Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 2967 insertions, 0 deletions

diff --git a/toolkit/components/viaduct/Viaduct.cpp b/toolkit/components/viaduct/Viaduct.cpp
new file mode 100644
index 0000000000..8d7f76b0f8
--- /dev/null
+++ b/toolkit/components/viaduct/Viaduct.cpp
@@ -0,0 +1,51 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/Viaduct.h"
+
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/ViaductRequest.h"
+
+namespace mozilla {
+
+namespace {
+
+extern "C" {
+uint8_t viaduct_initialize(
+    ViaductByteBuffer (*fetch_callback)(ViaductByteBuffer));
+}
+
+}  // namespace
+
+static StaticRefPtr<Viaduct> gViaduct;
+
+// static
+already_AddRefed<Viaduct> Viaduct::GetSingleton() {
+  if (gViaduct) {
+    return do_AddRef(gViaduct);
+  }
+
+  gViaduct = new Viaduct();
+  ClearOnShutdown(&gViaduct);
+  return do_AddRef(gViaduct);
+}
+
+NS_IMETHODIMP
+Viaduct::EnsureInitialized() {
+  if (mInitialized.compareExchange(false, true)) {
+    viaduct_initialize(ViaductCallback);
+  }
+  return NS_OK;
+}
+
+// static
+ViaductByteBuffer Viaduct::ViaductCallback(ViaductByteBuffer buffer) {
+  MOZ_ASSERT(!NS_IsMainThread(), "Background thread only!");
+  RefPtr<ViaductRequest> request = new ViaductRequest();
+  return request->MakeRequest(buffer);
+}
+
+NS_IMPL_ISUPPORTS(Viaduct, mozIViaduct)
+
+};  // namespace mozilla
diff --git a/toolkit/components/viaduct/Viaduct.h b/toolkit/components/viaduct/Viaduct.h
new file mode 100644
index 0000000000..03805bc98a
--- /dev/null
+++ b/toolkit/components/viaduct/Viaduct.h
@@ -0,0 +1,72 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_Viaduct_h
+#define mozilla_Viaduct_h
+
+#include "mozIViaduct.h"
+#include "mozilla/Atomics.h"
+
+/**
+ * Viaduct is a way for Application Services Rust components
+ * (https://github.com/mozilla/application-services) to make network requests
+ * using a trusted stack (gecko).
+ *
+ * The way it works is roughly as follows:
+ * - First we register a callback using `viaduct_initialize`
+ * (Viaduct::Initialize). This callback is stored on the Rust side
+ * in a static variable, therefore Initialize() must be called only once.
+ *
+ * - When the Rust code needs to make a network request, our callback
+ * (Viaduct::ViaductCallback) will be called with a protocol buffer describing
+ * the request to make on their behalf. Note 1: The callback MUST be called from
+ * a background thread as it is blocking. Note 2: It is our side responsibility
+ * to call `viaduct_destroy_bytebuffer` on the buffer.
+ *
+ * - We set a semaphore to make the background thread wait while we make the
+ * request on the main thread using nsIChannel. (ViaductRequest::MakeRequest)
+ *
+ * - Once a response is received, we allocate a bytebuffer to store the
+ * response using `viaduct_alloc_bytebuffer` and unlock the semaphore.
+ * (ViaductRequest::OnStopRequest)
+ *
+ * - The background thread is unlocked, and the callback returns the response to
+ * the Rust caller. (Viaduct::ViaductCallback)
+ *
+ * - The Rust caller will free the response buffer we allocated earlier.
+ *
+ * Reference:
+ * https://github.com/mozilla/application-services/blob/master/components/viaduct/README.md
+ */
+
+namespace mozilla {
+
+namespace {
+
+// A mapping of the ByteBuffer repr(C) Rust struct.
+typedef struct ViaductByteBuffer {
+  int64_t len;
+  uint8_t* data;
+} ViaductByteBuffer;
+
+}  // namespace
+
+class Viaduct final : public mozIViaduct {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_MOZIVIADUCT
+
+  Viaduct() : mInitialized(false) {}
+  static already_AddRefed<Viaduct> GetSingleton();
+
+ private:
+  static ViaductByteBuffer ViaductCallback(ViaductByteBuffer buffer);
+  Atomic<bool> mInitialized;
+
+  ~Viaduct() = default;
+};
+
+};  // namespace mozilla
+
+#endif  // mozilla_Viaduct_h
diff --git a/toolkit/components/viaduct/ViaductRequest.cpp b/toolkit/components/viaduct/ViaductRequest.cpp
new file mode 100644
index 0000000000..e72f087f01
--- /dev/null
+++ b/toolkit/components/viaduct/ViaductRequest.cpp
@@ -0,0 +1,319 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/ViaductRequest.h"
+
+#include "mozilla/ErrorNames.h"
+#include "mozilla/ResultExtensions.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/Services.h"
+
+#include "nsComponentManagerUtils.h"
+#include "nsContentUtils.h"
+#include "nsIAsyncVerifyRedirectCallback.h"
+#include "nsIHttpChannel.h"
+#include "nsIHttpHeaderVisitor.h"
+#include "nsIInputStream.h"
+#include "nsIUploadChannel2.h"
+#include "nsIURI.h"
+#include "nsNetUtil.h"
+#include "nsPrintfCString.h"
+#include "nsString.h"
+#include "nsStringStream.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla {
+
+namespace {
+
+extern "C" {
+ViaductByteBuffer viaduct_alloc_bytebuffer(int32_t);
+void viaduct_destroy_bytebuffer(ViaductByteBuffer);
+}
+
+}  // namespace
+
+class HeaderVisitor final : public nsIHttpHeaderVisitor {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIHTTPHEADERVISITOR
+
+  explicit HeaderVisitor(
+      google::protobuf::Map<std::string, std::string>* aHeaders)
+      : mHeaders(aHeaders) {}
+
+ private:
+  google::protobuf::Map<std::string, std::string>* mHeaders;
+  ~HeaderVisitor() = default;
+};
+
+NS_IMETHODIMP
+HeaderVisitor::VisitHeader(const nsACString& aHeader,
+                           const nsACString& aValue) {
+  (*mHeaders)[aHeader.BeginReading()] = aValue.BeginReading();
+  return NS_OK;
+}
+NS_IMPL_ISUPPORTS(HeaderVisitor, nsIHttpHeaderVisitor)
+
+nsCString ConvertMethod(
+    appservices::httpconfig::protobuf::Request_Method method);
+
+///////////////////////////////////////////////////////////////////////////////
+// ViaductRequest implementation
+
+ViaductByteBuffer ViaductRequest::MakeRequest(ViaductByteBuffer reqBuf) {
+  MOZ_ASSERT(!NS_IsMainThread(), "Background thread only!");
+  auto clearBuf = MakeScopeExit([&] { viaduct_destroy_bytebuffer(reqBuf); });
+  // We keep the protobuf parsing/serializing in the background thread.
+  appservices::httpconfig::protobuf::Request request;
+  if (!request.ParseFromArray(static_cast<const void*>(reqBuf.data),
+                              reqBuf.len)) {
+    // We still need to return something!
+    return ViaductByteBuffer{.len = 0, .data = nullptr};
+  }
+  MonitorAutoLock lock(mMonitor);
+  NS_DispatchToMainThread(NS_NewRunnableFunction(
+      "ViaductRequest::LaunchRequest", [this, &request]() {
+        nsresult rv = LaunchRequest(request);
+        if (NS_WARN_IF(NS_FAILED(rv))) {
+          // Something went very very wrong, but we still have to unblock
+          // the calling thread.
+          NotifyMonitor();
+        }
+      }));
+  while (!mDone) {
+    mMonitor.Wait();
+  }
+  ViaductByteBuffer respBuf =
+      viaduct_alloc_bytebuffer(mResponse.ByteSizeLong());
+  if (!mResponse.SerializeToArray(respBuf.data, respBuf.len)) {
+    viaduct_destroy_bytebuffer(respBuf);
+    return ViaductByteBuffer{.len = 0, .data = nullptr};
+  }
+  return respBuf;
+}
+
+nsresult ViaductRequest::LaunchRequest(
+    appservices::httpconfig::protobuf::Request& request) {
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = NS_NewURI(getter_AddRefs(uri), request.url().c_str());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsSecurityFlags secFlags =
+      nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL |
+      nsILoadInfo::SEC_COOKIES_OMIT;
+  uint32_t loadFlags = 0;
+
+  if (!request.use_caches()) {
+    loadFlags |= nsIRequest::LOAD_BYPASS_CACHE;
+  }
+
+  if (!request.follow_redirects()) {
+    secFlags |= nsILoadInfo::SEC_DONT_FOLLOW_REDIRECTS;
+  }
+
+  rv = NS_NewChannel(getter_AddRefs(mChannel), uri,
+                     nsContentUtils::GetSystemPrincipal(), secFlags,
+                     nsIContentPolicy::TYPE_OTHER,
+                     nullptr,  // nsICookieJarSettings
+                     nullptr,  // aPerformanceStorage
+                     nullptr,  // aLoadGroup
+                     nullptr, loadFlags);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel);
+  nsCString method = ConvertMethod(request.method());
+  rv = httpChannel->SetRequestMethod(method);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  for (auto& header : request.headers()) {
+    rv = httpChannel->SetRequestHeader(
+        nsDependentCString(header.first.c_str(), header.first.size()),
+        nsDependentCString(header.second.c_str(), header.second.size()),
+        false /* merge */);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  // Body
+  if (request.has_body()) {
+    const std::string& body = request.body();
+    nsCOMPtr<nsIStringInputStream> stream(
+        do_CreateInstance(NS_STRINGINPUTSTREAM_CONTRACTID));
+    rv = stream->SetData(body.data(), body.size());
+    NS_ENSURE_SUCCESS(rv, rv);
+    nsCOMPtr<nsIUploadChannel2> uploadChannel = do_QueryInterface(mChannel);
+    uploadChannel->ExplicitSetUploadStream(stream, VoidCString(), -1, method,
+                                           false /* aStreamHasHeaders */);
+  }
+
+  MOZ_TRY_VAR(
+      mConnectTimeoutTimer,
+      NS_NewTimerWithCallback(this, request.connect_timeout_secs() * 1000,
+                              nsITimer::TYPE_ONE_SHOT));
+  MOZ_TRY_VAR(mReadTimeoutTimer,
+              NS_NewTimerWithCallback(this, request.read_timeout_secs() * 1000,
+                                      nsITimer::TYPE_ONE_SHOT));
+
+  rv = httpChannel->AsyncOpen(this);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return rv;
+}
+
+nsCString ConvertMethod(
+    appservices::httpconfig::protobuf::Request_Method method) {
+  using appservices::httpconfig::protobuf::Request_Method;
+  switch (method) {
+    case Request_Method::Request_Method_GET:
+      return "GET"_ns;
+    case Request_Method::Request_Method_HEAD:
+      return "HEAD"_ns;
+    case Request_Method::Request_Method_POST:
+      return "POST"_ns;
+    case Request_Method::Request_Method_PUT:
+      return "PUT"_ns;
+    case Request_Method::Request_Method_DELETE:
+      return "DELETE"_ns;
+    case Request_Method::Request_Method_CONNECT:
+      return "CONNECT"_ns;
+    case Request_Method::Request_Method_OPTIONS:
+      return "OPTIONS"_ns;
+    case Request_Method::Request_Method_TRACE:
+      return "TRACE"_ns;
+  }
+  return "UNKNOWN"_ns;
+}
+
+void ViaductRequest::ClearTimers() {
+  if (mConnectTimeoutTimer) {
+    mConnectTimeoutTimer->Cancel();
+    mConnectTimeoutTimer = nullptr;
+  }
+  if (mReadTimeoutTimer) {
+    mReadTimeoutTimer->Cancel();
+    mReadTimeoutTimer = nullptr;
+  }
+}
+
+void ViaductRequest::NotifyMonitor() {
+  MonitorAutoLock lock(mMonitor);
+  mDone = true;
+  mMonitor.Notify();
+}
+
+ViaductRequest::~ViaductRequest() {
+  ClearTimers();
+  if (mChannel) {
+    mChannel->Cancel(NS_ERROR_ABORT);
+    mChannel = nullptr;
+  }
+  NotifyMonitor();
+}
+
+NS_IMPL_ISUPPORTS(ViaductRequest, nsIStreamListener, nsITimerCallback,
+                  nsIChannelEventSink)
+
+///////////////////////////////////////////////////////////////////////////////
+// nsIStreamListener implementation
+
+NS_IMETHODIMP
+ViaductRequest::OnStartRequest(nsIRequest* aRequest) {
+  if (mConnectTimeoutTimer) {
+    mConnectTimeoutTimer->Cancel();
+    mConnectTimeoutTimer = nullptr;
+  }
+  return NS_OK;
+}
+
+static nsresult AssignResponseToBuffer(nsIInputStream* aIn, void* aClosure,
+                                       const char* aFromRawSegment,
+                                       uint32_t aToOffset, uint32_t aCount,
+                                       uint32_t* aWriteCount) {
+  nsCString* buf = static_cast<nsCString*>(aClosure);
+  buf->Append(aFromRawSegment, aCount);
+  *aWriteCount = aCount;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+ViaductRequest::OnDataAvailable(nsIRequest* aRequest,
+                                nsIInputStream* aInputStream, uint64_t aOffset,
+                                uint32_t aCount) {
+  nsresult rv;
+  uint32_t readCount;
+  rv = aInputStream->ReadSegments(AssignResponseToBuffer, &mBodyBuffer, aCount,
+                                  &readCount);
+  NS_ENSURE_SUCCESS(rv, rv);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+ViaductRequest::OnStopRequest(nsIRequest* aRequest, nsresult aStatusCode) {
+  ClearTimers();
+  auto defer = MakeScopeExit([&] {
+    mChannel = nullptr;
+    NotifyMonitor();
+  });
+
+  if (NS_FAILED(aStatusCode)) {
+    nsCString errorName;
+    GetErrorName(aStatusCode, errorName);
+    nsPrintfCString msg("Request error: %s", errorName.get());
+    mResponse.set_exception_message(msg.BeginReading());
+  } else {
+    nsresult rv;
+    nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aRequest, &rv);
+    // Early return is OK because MakeScopeExit will call Notify()
+    // and unblock the original calling thread.
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    uint32_t httpStatus;
+    rv = httpChannel->GetResponseStatus(&httpStatus);
+    NS_ENSURE_SUCCESS(rv, rv);
+    mResponse.set_status(httpStatus);
+
+    nsCOMPtr<nsIURI> uri;
+    httpChannel->GetURI(getter_AddRefs(uri));
+    nsAutoCString uriStr;
+    uri->GetSpec(uriStr);
+    mResponse.set_url(uriStr.BeginReading());
+
+    auto* headers = mResponse.mutable_headers();
+    nsCOMPtr<nsIHttpHeaderVisitor> visitor = new HeaderVisitor(headers);
+    rv = httpChannel->VisitResponseHeaders(visitor);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    mResponse.set_body(mBodyBuffer.BeginReading());
+  }
+
+  return NS_OK;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// nsIChannelEventSink implementation
+
+NS_IMETHODIMP
+ViaductRequest::AsyncOnChannelRedirect(
+    nsIChannel* aOldChannel, nsIChannel* aNewChannel, uint32_t flags,
+    nsIAsyncVerifyRedirectCallback* callback) {
+  mChannel = aNewChannel;
+  callback->OnRedirectVerifyCallback(NS_OK);
+  return NS_OK;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// nsITimerCallback implementation
+
+NS_IMETHODIMP
+ViaductRequest::Notify(nsITimer* timer) {
+  ClearTimers();
+  // Cancelling the channel will trigger OnStopRequest.
+  if (mChannel) {
+    mChannel->Cancel(NS_ERROR_ABORT);
+    mChannel = nullptr;
+  }
+  return NS_OK;
+}
+
+};  // namespace mozilla
diff --git a/toolkit/components/viaduct/ViaductRequest.h b/toolkit/components/viaduct/ViaductRequest.h
new file mode 100644
index 0000000000..d79387f1fd
--- /dev/null
+++ b/toolkit/components/viaduct/ViaductRequest.h
@@ -0,0 +1,50 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_ViaductRequest_h
+#define mozilla_ViaductRequest_h
+
+#include "mozilla/Monitor.h"
+#include "mozilla/fetch_msg_types.pb.h"
+#include "mozilla/Viaduct.h"
+
+#include "nsCOMPtr.h"
+#include "nsIChannel.h"
+#include "nsIChannelEventSink.h"
+#include "nsIStreamListener.h"
+#include "nsITimer.h"
+
+namespace mozilla {
+
+class ViaductRequest final : public nsIStreamListener,
+                             public nsITimerCallback,
+                             public nsIChannelEventSink {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIREQUESTOBSERVER
+  NS_DECL_NSISTREAMLISTENER
+  NS_DECL_NSITIMERCALLBACK
+  NS_DECL_NSICHANNELEVENTSINK
+
+  ViaductRequest()
+      : mDone(false), mChannel(nullptr), mMonitor("ViaductRequest") {}
+  ViaductByteBuffer MakeRequest(ViaductByteBuffer reqBuf);
+
+ private:
+  nsresult LaunchRequest(appservices::httpconfig::protobuf::Request&);
+  void ClearTimers();
+  void NotifyMonitor();
+  bool mDone;
+  nsCOMPtr<nsIChannel> mChannel;
+  nsCString mBodyBuffer;
+  nsCOMPtr<nsITimer> mConnectTimeoutTimer;
+  nsCOMPtr<nsITimer> mReadTimeoutTimer;
+  appservices::httpconfig::protobuf::Response mResponse;
+  Monitor mMonitor;
+  ~ViaductRequest();
+};
+
+};  // namespace mozilla
+
+#endif  // mozilla_ViaductRequest_h
diff --git a/toolkit/components/viaduct/components.conf b/toolkit/components/viaduct/components.conf
new file mode 100644
index 0000000000..1c17256367
--- /dev/null
+++ b/toolkit/components/viaduct/components.conf
@@ -0,0 +1,14 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Classes = [
+    {
+        'cid': '{1e668408-40aa-4185-991c-12671e2471dc}',
+        'contract_ids': ['@mozilla.org/toolkit/viaduct;1'],
+        'singleton': True,
+        'type': 'mozilla::Viaduct',
+        'headers': ['mozilla/Viaduct.h'],
+        'constructor': 'mozilla::Viaduct::GetSingleton',
+    }
+]
diff --git a/toolkit/components/viaduct/fetch_msg_types.pb.cc b/toolkit/components/viaduct/fetch_msg_types.pb.cc
new file mode 100644
index 0000000000..cc4422eabf
--- /dev/null
+++ b/toolkit/components/viaduct/fetch_msg_types.pb.cc
@@ -0,0 +1,1083 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: fetch_msg_types.proto
+
+#include "fetch_msg_types.pb.h"
+
+#include <algorithm>
+
+#include <google/protobuf/io/coded_stream.h>
+#include <google/protobuf/extension_set.h>
+#include <google/protobuf/wire_format_lite.h>
+#include <google/protobuf/io/zero_copy_stream_impl_lite.h>
+// @@protoc_insertion_point(includes)
+#include <google/protobuf/port_def.inc>
+extern PROTOBUF_INTERNAL_EXPORT_fetch_5fmsg_5ftypes_2eproto ::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<0> scc_info_Request_HeadersEntry_DoNotUse_fetch_5fmsg_5ftypes_2eproto;
+extern PROTOBUF_INTERNAL_EXPORT_fetch_5fmsg_5ftypes_2eproto ::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<0> scc_info_Response_HeadersEntry_DoNotUse_fetch_5fmsg_5ftypes_2eproto;
+namespace mozilla {
+namespace appservices {
+namespace httpconfig {
+namespace protobuf {
+class Request_HeadersEntry_DoNotUseDefaultTypeInternal {
+ public:
+  ::PROTOBUF_NAMESPACE_ID::internal::ExplicitlyConstructed<Request_HeadersEntry_DoNotUse> _instance;
+} _Request_HeadersEntry_DoNotUse_default_instance_;
+class RequestDefaultTypeInternal {
+ public:
+  ::PROTOBUF_NAMESPACE_ID::internal::ExplicitlyConstructed<Request> _instance;
+} _Request_default_instance_;
+class Response_HeadersEntry_DoNotUseDefaultTypeInternal {
+ public:
+  ::PROTOBUF_NAMESPACE_ID::internal::ExplicitlyConstructed<Response_HeadersEntry_DoNotUse> _instance;
+} _Response_HeadersEntry_DoNotUse_default_instance_;
+class ResponseDefaultTypeInternal {
+ public:
+  ::PROTOBUF_NAMESPACE_ID::internal::ExplicitlyConstructed<Response> _instance;
+} _Response_default_instance_;
+}  // namespace protobuf
+}  // namespace httpconfig
+}  // namespace appservices
+}  // namespace mozilla
+static void InitDefaultsscc_info_Request_fetch_5fmsg_5ftypes_2eproto() {
+  GOOGLE_PROTOBUF_VERIFY_VERSION;
+
+  {
+    void* ptr = &::mozilla::appservices::httpconfig::protobuf::_Request_default_instance_;
+    new (ptr) ::mozilla::appservices::httpconfig::protobuf::Request();
+    ::PROTOBUF_NAMESPACE_ID::internal::OnShutdownDestroyMessage(ptr);
+  }
+  ::mozilla::appservices::httpconfig::protobuf::Request::InitAsDefaultInstance();
+}
+
+::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<1> scc_info_Request_fetch_5fmsg_5ftypes_2eproto =
+    {{ATOMIC_VAR_INIT(::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase::kUninitialized), 1, 0, InitDefaultsscc_info_Request_fetch_5fmsg_5ftypes_2eproto}, {
+      &scc_info_Request_HeadersEntry_DoNotUse_fetch_5fmsg_5ftypes_2eproto.base,}};
+
+static void InitDefaultsscc_info_Request_HeadersEntry_DoNotUse_fetch_5fmsg_5ftypes_2eproto() {
+  GOOGLE_PROTOBUF_VERIFY_VERSION;
+
+  {
+    void* ptr = &::mozilla::appservices::httpconfig::protobuf::_Request_HeadersEntry_DoNotUse_default_instance_;
+    new (ptr) ::mozilla::appservices::httpconfig::protobuf::Request_HeadersEntry_DoNotUse();
+  }
+  ::mozilla::appservices::httpconfig::protobuf::Request_HeadersEntry_DoNotUse::InitAsDefaultInstance();
+}
+
+::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<0> scc_info_Request_HeadersEntry_DoNotUse_fetch_5fmsg_5ftypes_2eproto =
+    {{ATOMIC_VAR_INIT(::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase::kUninitialized), 0, 0, InitDefaultsscc_info_Request_HeadersEntry_DoNotUse_fetch_5fmsg_5ftypes_2eproto}, {}};
+
+static void InitDefaultsscc_info_Response_fetch_5fmsg_5ftypes_2eproto() {
+  GOOGLE_PROTOBUF_VERIFY_VERSION;
+
+  {
+    void* ptr = &::mozilla::appservices::httpconfig::protobuf::_Response_default_instance_;
+    new (ptr) ::mozilla::appservices::httpconfig::protobuf::Response();
+    ::PROTOBUF_NAMESPACE_ID::internal::OnShutdownDestroyMessage(ptr);
+  }
+  ::mozilla::appservices::httpconfig::protobuf::Response::InitAsDefaultInstance();
+}
+
+::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<1> scc_info_Response_fetch_5fmsg_5ftypes_2eproto =
+    {{ATOMIC_VAR_INIT(::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase::kUninitialized), 1, 0, InitDefaultsscc_info_Response_fetch_5fmsg_5ftypes_2eproto}, {
+      &scc_info_Response_HeadersEntry_DoNotUse_fetch_5fmsg_5ftypes_2eproto.base,}};
+
+static void InitDefaultsscc_info_Response_HeadersEntry_DoNotUse_fetch_5fmsg_5ftypes_2eproto() {
+  GOOGLE_PROTOBUF_VERIFY_VERSION;
+
+  {
+    void* ptr = &::mozilla::appservices::httpconfig::protobuf::_Response_HeadersEntry_DoNotUse_default_instance_;
+    new (ptr) ::mozilla::appservices::httpconfig::protobuf::Response_HeadersEntry_DoNotUse();
+  }
+  ::mozilla::appservices::httpconfig::protobuf::Response_HeadersEntry_DoNotUse::InitAsDefaultInstance();
+}
+
+::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<0> scc_info_Response_HeadersEntry_DoNotUse_fetch_5fmsg_5ftypes_2eproto =
+    {{ATOMIC_VAR_INIT(::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase::kUninitialized), 0, 0, InitDefaultsscc_info_Response_HeadersEntry_DoNotUse_fetch_5fmsg_5ftypes_2eproto}, {}};
+
+namespace mozilla {
+namespace appservices {
+namespace httpconfig {
+namespace protobuf {
+bool Request_Method_IsValid(int value) {
+  switch (value) {
+    case 0:
+    case 1:
+    case 2:
+    case 3:
+    case 4:
+    case 5:
+    case 6:
+    case 7:
+      return true;
+    default:
+      return false;
+  }
+}
+
+static ::PROTOBUF_NAMESPACE_ID::internal::ExplicitlyConstructed<std::string> Request_Method_strings[8] = {};
+
+static const char Request_Method_names[] =
+  "CONNECT"
+  "DELETE"
+  "GET"
+  "HEAD"
+  "OPTIONS"
+  "POST"
+  "PUT"
+  "TRACE";
+
+static const ::PROTOBUF_NAMESPACE_ID::internal::EnumEntry Request_Method_entries[] = {
+  { {Request_Method_names + 0, 7}, 5 },
+  { {Request_Method_names + 7, 6}, 4 },
+  { {Request_Method_names + 13, 3}, 0 },
+  { {Request_Method_names + 16, 4}, 1 },
+  { {Request_Method_names + 20, 7}, 6 },
+  { {Request_Method_names + 27, 4}, 2 },
+  { {Request_Method_names + 31, 3}, 3 },
+  { {Request_Method_names + 34, 5}, 7 },
+};
+
+static const int Request_Method_entries_by_number[] = {
+  2, // 0 -> GET
+  3, // 1 -> HEAD
+  5, // 2 -> POST
+  6, // 3 -> PUT
+  1, // 4 -> DELETE
+  0, // 5 -> CONNECT
+  4, // 6 -> OPTIONS
+  7, // 7 -> TRACE
+};
+
+const std::string& Request_Method_Name(
+    Request_Method value) {
+  static const bool dummy =
+      ::PROTOBUF_NAMESPACE_ID::internal::InitializeEnumStrings(
+          Request_Method_entries,
+          Request_Method_entries_by_number,
+          8, Request_Method_strings);
+  (void) dummy;
+  int idx = ::PROTOBUF_NAMESPACE_ID::internal::LookUpEnumName(
+      Request_Method_entries,
+      Request_Method_entries_by_number,
+      8, value);
+  return idx == -1 ? ::PROTOBUF_NAMESPACE_ID::internal::GetEmptyString() :
+                     Request_Method_strings[idx].get();
+}
+bool Request_Method_Parse(
+    const std::string& name, Request_Method* value) {
+  int int_value;
+  bool success = ::PROTOBUF_NAMESPACE_ID::internal::LookUpEnumValue(
+      Request_Method_entries, 8, name, &int_value);
+  if (success) {
+    *value = static_cast<Request_Method>(int_value);
+  }
+  return success;
+}
+#if (__cplusplus < 201703) && (!defined(_MSC_VER) || _MSC_VER >= 1900)
+constexpr Request_Method Request::GET;
+constexpr Request_Method Request::HEAD;
+constexpr Request_Method Request::POST;
+constexpr Request_Method Request::PUT;
+constexpr Request_Method Request::DELETE;
+constexpr Request_Method Request::CONNECT;
+constexpr Request_Method Request::OPTIONS;
+constexpr Request_Method Request::TRACE;
+constexpr Request_Method Request::Method_MIN;
+constexpr Request_Method Request::Method_MAX;
+constexpr int Request::Method_ARRAYSIZE;
+#endif  // (__cplusplus < 201703) && (!defined(_MSC_VER) || _MSC_VER >= 1900)
+
+// ===================================================================
+
+Request_HeadersEntry_DoNotUse::Request_HeadersEntry_DoNotUse() {}
+Request_HeadersEntry_DoNotUse::Request_HeadersEntry_DoNotUse(::PROTOBUF_NAMESPACE_ID::Arena* arena)
+    : SuperType(arena) {}
+void Request_HeadersEntry_DoNotUse::MergeFrom(const Request_HeadersEntry_DoNotUse& other) {
+  MergeFromInternal(other);
+}
+
+// ===================================================================
+
+void Request::InitAsDefaultInstance() {
+}
+class Request::_Internal {
+ public:
+  using HasBits = decltype(std::declval<Request>()._has_bits_);
+  static void set_has_method(HasBits* has_bits) {
+    (*has_bits)[0] |= 4u;
+  }
+  static void set_has_url(HasBits* has_bits) {
+    (*has_bits)[0] |= 1u;
+  }
+  static void set_has_body(HasBits* has_bits) {
+    (*has_bits)[0] |= 2u;
+  }
+  static void set_has_follow_redirects(HasBits* has_bits) {
+    (*has_bits)[0] |= 8u;
+  }
+  static void set_has_use_caches(HasBits* has_bits) {
+    (*has_bits)[0] |= 16u;
+  }
+  static void set_has_connect_timeout_secs(HasBits* has_bits) {
+    (*has_bits)[0] |= 32u;
+  }
+  static void set_has_read_timeout_secs(HasBits* has_bits) {
+    (*has_bits)[0] |= 64u;
+  }
+};
+
+Request::Request()
+  : ::PROTOBUF_NAMESPACE_ID::MessageLite(), _internal_metadata_(nullptr) {
+  SharedCtor();
+  // @@protoc_insertion_point(constructor:mozilla.appservices.httpconfig.protobuf.Request)
+}
+Request::Request(const Request& from)
+  : ::PROTOBUF_NAMESPACE_ID::MessageLite(),
+      _internal_metadata_(nullptr),
+      _has_bits_(from._has_bits_) {
+  _internal_metadata_.MergeFrom(from._internal_metadata_);
+  headers_.MergeFrom(from.headers_);
+  url_.UnsafeSetDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  if (from._internal_has_url()) {
+    url_.AssignWithDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), from.url_);
+  }
+  body_.UnsafeSetDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  if (from._internal_has_body()) {
+    body_.AssignWithDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), from.body_);
+  }
+  ::memcpy(&method_, &from.method_,
+    static_cast<size_t>(reinterpret_cast<char*>(&read_timeout_secs_) -
+    reinterpret_cast<char*>(&method_)) + sizeof(read_timeout_secs_));
+  // @@protoc_insertion_point(copy_constructor:mozilla.appservices.httpconfig.protobuf.Request)
+}
+
+void Request::SharedCtor() {
+  ::PROTOBUF_NAMESPACE_ID::internal::InitSCC(&scc_info_Request_fetch_5fmsg_5ftypes_2eproto.base);
+  url_.UnsafeSetDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  body_.UnsafeSetDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  ::memset(&method_, 0, static_cast<size_t>(
+      reinterpret_cast<char*>(&read_timeout_secs_) -
+      reinterpret_cast<char*>(&method_)) + sizeof(read_timeout_secs_));
+}
+
+Request::~Request() {
+  // @@protoc_insertion_point(destructor:mozilla.appservices.httpconfig.protobuf.Request)
+  SharedDtor();
+}
+
+void Request::SharedDtor() {
+  url_.DestroyNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  body_.DestroyNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+
+void Request::SetCachedSize(int size) const {
+  _cached_size_.Set(size);
+}
+const Request& Request::default_instance() {
+  ::PROTOBUF_NAMESPACE_ID::internal::InitSCC(&::scc_info_Request_fetch_5fmsg_5ftypes_2eproto.base);
+  return *internal_default_instance();
+}
+
+
+void Request::Clear() {
+// @@protoc_insertion_point(message_clear_start:mozilla.appservices.httpconfig.protobuf.Request)
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  headers_.Clear();
+  cached_has_bits = _has_bits_[0];
+  if (cached_has_bits & 0x00000003u) {
+    if (cached_has_bits & 0x00000001u) {
+      url_.ClearNonDefaultToEmptyNoArena();
+    }
+    if (cached_has_bits & 0x00000002u) {
+      body_.ClearNonDefaultToEmptyNoArena();
+    }
+  }
+  if (cached_has_bits & 0x0000007cu) {
+    ::memset(&method_, 0, static_cast<size_t>(
+        reinterpret_cast<char*>(&read_timeout_secs_) -
+        reinterpret_cast<char*>(&method_)) + sizeof(read_timeout_secs_));
+  }
+  _has_bits_.Clear();
+  _internal_metadata_.Clear();
+}
+
+const char* Request::_InternalParse(const char* ptr, ::PROTOBUF_NAMESPACE_ID::internal::ParseContext* ctx) {
+#define CHK_(x) if (PROTOBUF_PREDICT_FALSE(!(x))) goto failure
+  _Internal::HasBits has_bits{};
+  while (!ctx->Done(&ptr)) {
+    ::PROTOBUF_NAMESPACE_ID::uint32 tag;
+    ptr = ::PROTOBUF_NAMESPACE_ID::internal::ReadTag(ptr, &tag);
+    CHK_(ptr);
+    switch (tag >> 3) {
+      // required .mozilla.appservices.httpconfig.protobuf.Request.Method method = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 8)) {
+          ::PROTOBUF_NAMESPACE_ID::uint64 val = ::PROTOBUF_NAMESPACE_ID::internal::ReadVarint(&ptr);
+          CHK_(ptr);
+          if (PROTOBUF_PREDICT_TRUE(::mozilla::appservices::httpconfig::protobuf::Request_Method_IsValid(val))) {
+            _internal_set_method(static_cast<::mozilla::appservices::httpconfig::protobuf::Request_Method>(val));
+          } else {
+            ::PROTOBUF_NAMESPACE_ID::internal::WriteVarint(1, val, mutable_unknown_fields());
+          }
+        } else goto handle_unusual;
+        continue;
+      // required string url = 2;
+      case 2:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 18)) {
+          auto str = _internal_mutable_url();
+          ptr = ::PROTOBUF_NAMESPACE_ID::internal::InlineGreedyStringParser(str, ptr, ctx);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      // optional bytes body = 3;
+      case 3:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 26)) {
+          auto str = _internal_mutable_body();
+          ptr = ::PROTOBUF_NAMESPACE_ID::internal::InlineGreedyStringParser(str, ptr, ctx);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      // map<string, string> headers = 4;
+      case 4:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 34)) {
+          ptr -= 1;
+          do {
+            ptr += 1;
+            ptr = ctx->ParseMessage(&headers_, ptr);
+            CHK_(ptr);
+            if (!ctx->DataAvailable(ptr)) break;
+          } while (::PROTOBUF_NAMESPACE_ID::internal::ExpectTag<34>(ptr));
+        } else goto handle_unusual;
+        continue;
+      // required bool follow_redirects = 5;
+      case 5:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 40)) {
+          _Internal::set_has_follow_redirects(&has_bits);
+          follow_redirects_ = ::PROTOBUF_NAMESPACE_ID::internal::ReadVarint(&ptr);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      // required bool use_caches = 6;
+      case 6:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 48)) {
+          _Internal::set_has_use_caches(&has_bits);
+          use_caches_ = ::PROTOBUF_NAMESPACE_ID::internal::ReadVarint(&ptr);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      // required int32 connect_timeout_secs = 7;
+      case 7:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 56)) {
+          _Internal::set_has_connect_timeout_secs(&has_bits);
+          connect_timeout_secs_ = ::PROTOBUF_NAMESPACE_ID::internal::ReadVarint(&ptr);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      // required int32 read_timeout_secs = 8;
+      case 8:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 64)) {
+          _Internal::set_has_read_timeout_secs(&has_bits);
+          read_timeout_secs_ = ::PROTOBUF_NAMESPACE_ID::internal::ReadVarint(&ptr);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      default: {
+      handle_unusual:
+        if ((tag & 7) == 4 || tag == 0) {
+          ctx->SetLastTag(tag);
+          goto success;
+        }
+        ptr = UnknownFieldParse(tag, &_internal_metadata_, ptr, ctx);
+        CHK_(ptr != nullptr);
+        continue;
+      }
+    }  // switch
+  }  // while
+success:
+  _has_bits_.Or(has_bits);
+  return ptr;
+failure:
+  ptr = nullptr;
+  goto success;
+#undef CHK_
+}
+
+::PROTOBUF_NAMESPACE_ID::uint8* Request::_InternalSerialize(
+    ::PROTOBUF_NAMESPACE_ID::uint8* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {
+  // @@protoc_insertion_point(serialize_to_array_start:mozilla.appservices.httpconfig.protobuf.Request)
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  cached_has_bits = _has_bits_[0];
+  // required .mozilla.appservices.httpconfig.protobuf.Request.Method method = 1;
+  if (cached_has_bits & 0x00000004u) {
+    target = stream->EnsureSpace(target);
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::WriteEnumToArray(
+      1, this->_internal_method(), target);
+  }
+
+  // required string url = 2;
+  if (cached_has_bits & 0x00000001u) {
+    target = stream->WriteStringMaybeAliased(
+        2, this->_internal_url(), target);
+  }
+
+  // optional bytes body = 3;
+  if (cached_has_bits & 0x00000002u) {
+    target = stream->WriteBytesMaybeAliased(
+        3, this->_internal_body(), target);
+  }
+
+  // map<string, string> headers = 4;
+  if (!this->_internal_headers().empty()) {
+    typedef ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::const_pointer
+        ConstPtr;
+    typedef ConstPtr SortItem;
+    typedef ::PROTOBUF_NAMESPACE_ID::internal::CompareByDerefFirst<SortItem> Less;
+    struct Utf8Check {
+      static void Check(ConstPtr p) {
+      }
+    };
+
+    if (stream->IsSerializationDeterministic() &&
+        this->_internal_headers().size() > 1) {
+      ::std::unique_ptr<SortItem[]> items(
+          new SortItem[this->_internal_headers().size()]);
+      typedef ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::size_type size_type;
+      size_type n = 0;
+      for (::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::const_iterator
+          it = this->_internal_headers().begin();
+          it != this->_internal_headers().end(); ++it, ++n) {
+        items[static_cast<ptrdiff_t>(n)] = SortItem(&*it);
+      }
+      ::std::sort(&items[0], &items[static_cast<ptrdiff_t>(n)], Less());
+      for (size_type i = 0; i < n; i++) {
+        target = Request_HeadersEntry_DoNotUse::Funcs::InternalSerialize(4, items[static_cast<ptrdiff_t>(i)]->first, items[static_cast<ptrdiff_t>(i)]->second, target, stream);
+        Utf8Check::Check(&(*items[static_cast<ptrdiff_t>(i)]));
+      }
+    } else {
+      for (::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::const_iterator
+          it = this->_internal_headers().begin();
+          it != this->_internal_headers().end(); ++it) {
+        target = Request_HeadersEntry_DoNotUse::Funcs::InternalSerialize(4, it->first, it->second, target, stream);
+        Utf8Check::Check(&(*it));
+      }
+    }
+  }
+
+  // required bool follow_redirects = 5;
+  if (cached_has_bits & 0x00000008u) {
+    target = stream->EnsureSpace(target);
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::WriteBoolToArray(5, this->_internal_follow_redirects(), target);
+  }
+
+  // required bool use_caches = 6;
+  if (cached_has_bits & 0x00000010u) {
+    target = stream->EnsureSpace(target);
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::WriteBoolToArray(6, this->_internal_use_caches(), target);
+  }
+
+  // required int32 connect_timeout_secs = 7;
+  if (cached_has_bits & 0x00000020u) {
+    target = stream->EnsureSpace(target);
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::WriteInt32ToArray(7, this->_internal_connect_timeout_secs(), target);
+  }
+
+  // required int32 read_timeout_secs = 8;
+  if (cached_has_bits & 0x00000040u) {
+    target = stream->EnsureSpace(target);
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::WriteInt32ToArray(8, this->_internal_read_timeout_secs(), target);
+  }
+
+  if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {
+    target = stream->WriteRaw(_internal_metadata_.unknown_fields().data(),
+        static_cast<int>(_internal_metadata_.unknown_fields().size()), target);
+  }
+  // @@protoc_insertion_point(serialize_to_array_end:mozilla.appservices.httpconfig.protobuf.Request)
+  return target;
+}
+
+size_t Request::RequiredFieldsByteSizeFallback() const {
+// @@protoc_insertion_point(required_fields_byte_size_fallback_start:mozilla.appservices.httpconfig.protobuf.Request)
+  size_t total_size = 0;
+
+  if (_internal_has_url()) {
+    // required string url = 2;
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
+        this->_internal_url());
+  }
+
+  if (_internal_has_method()) {
+    // required .mozilla.appservices.httpconfig.protobuf.Request.Method method = 1;
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::EnumSize(this->_internal_method());
+  }
+
+  if (_internal_has_follow_redirects()) {
+    // required bool follow_redirects = 5;
+    total_size += 1 + 1;
+  }
+
+  if (_internal_has_use_caches()) {
+    // required bool use_caches = 6;
+    total_size += 1 + 1;
+  }
+
+  if (_internal_has_connect_timeout_secs()) {
+    // required int32 connect_timeout_secs = 7;
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::Int32Size(
+        this->_internal_connect_timeout_secs());
+  }
+
+  if (_internal_has_read_timeout_secs()) {
+    // required int32 read_timeout_secs = 8;
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::Int32Size(
+        this->_internal_read_timeout_secs());
+  }
+
+  return total_size;
+}
+size_t Request::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:mozilla.appservices.httpconfig.protobuf.Request)
+  size_t total_size = 0;
+
+  if (((_has_bits_[0] & 0x0000007d) ^ 0x0000007d) == 0) {  // All required fields are present.
+    // required string url = 2;
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
+        this->_internal_url());
+
+    // required .mozilla.appservices.httpconfig.protobuf.Request.Method method = 1;
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::EnumSize(this->_internal_method());
+
+    // required bool follow_redirects = 5;
+    total_size += 1 + 1;
+
+    // required bool use_caches = 6;
+    total_size += 1 + 1;
+
+    // required int32 connect_timeout_secs = 7;
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::Int32Size(
+        this->_internal_connect_timeout_secs());
+
+    // required int32 read_timeout_secs = 8;
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::Int32Size(
+        this->_internal_read_timeout_secs());
+
+  } else {
+    total_size += RequiredFieldsByteSizeFallback();
+  }
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  // map<string, string> headers = 4;
+  total_size += 1 *
+      ::PROTOBUF_NAMESPACE_ID::internal::FromIntSize(this->_internal_headers_size());
+  for (::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::const_iterator
+      it = this->_internal_headers().begin();
+      it != this->_internal_headers().end(); ++it) {
+    total_size += Request_HeadersEntry_DoNotUse::Funcs::ByteSizeLong(it->first, it->second);
+  }
+
+  // optional bytes body = 3;
+  cached_has_bits = _has_bits_[0];
+  if (cached_has_bits & 0x00000002u) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::BytesSize(
+        this->_internal_body());
+  }
+
+  if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {
+    total_size += _internal_metadata_.unknown_fields().size();
+  }
+  int cached_size = ::PROTOBUF_NAMESPACE_ID::internal::ToCachedSize(total_size);
+  SetCachedSize(cached_size);
+  return total_size;
+}
+
+void Request::CheckTypeAndMergeFrom(
+    const ::PROTOBUF_NAMESPACE_ID::MessageLite& from) {
+  MergeFrom(*::PROTOBUF_NAMESPACE_ID::internal::DownCast<const Request*>(
+      &from));
+}
+
+void Request::MergeFrom(const Request& from) {
+// @@protoc_insertion_point(class_specific_merge_from_start:mozilla.appservices.httpconfig.protobuf.Request)
+  GOOGLE_DCHECK_NE(&from, this);
+  _internal_metadata_.MergeFrom(from._internal_metadata_);
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  headers_.MergeFrom(from.headers_);
+  cached_has_bits = from._has_bits_[0];
+  if (cached_has_bits & 0x0000007fu) {
+    if (cached_has_bits & 0x00000001u) {
+      _has_bits_[0] |= 0x00000001u;
+      url_.AssignWithDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), from.url_);
+    }
+    if (cached_has_bits & 0x00000002u) {
+      _has_bits_[0] |= 0x00000002u;
+      body_.AssignWithDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), from.body_);
+    }
+    if (cached_has_bits & 0x00000004u) {
+      method_ = from.method_;
+    }
+    if (cached_has_bits & 0x00000008u) {
+      follow_redirects_ = from.follow_redirects_;
+    }
+    if (cached_has_bits & 0x00000010u) {
+      use_caches_ = from.use_caches_;
+    }
+    if (cached_has_bits & 0x00000020u) {
+      connect_timeout_secs_ = from.connect_timeout_secs_;
+    }
+    if (cached_has_bits & 0x00000040u) {
+      read_timeout_secs_ = from.read_timeout_secs_;
+    }
+    _has_bits_[0] |= cached_has_bits;
+  }
+}
+
+void Request::CopyFrom(const Request& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:mozilla.appservices.httpconfig.protobuf.Request)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool Request::IsInitialized() const {
+  if ((_has_bits_[0] & 0x0000007d) != 0x0000007d) return false;
+  return true;
+}
+
+void Request::InternalSwap(Request* other) {
+  using std::swap;
+  _internal_metadata_.Swap(&other->_internal_metadata_);
+  swap(_has_bits_[0], other->_has_bits_[0]);
+  headers_.Swap(&other->headers_);
+  url_.Swap(&other->url_, &::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(),
+    GetArenaNoVirtual());
+  body_.Swap(&other->body_, &::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(),
+    GetArenaNoVirtual());
+  swap(method_, other->method_);
+  swap(follow_redirects_, other->follow_redirects_);
+  swap(use_caches_, other->use_caches_);
+  swap(connect_timeout_secs_, other->connect_timeout_secs_);
+  swap(read_timeout_secs_, other->read_timeout_secs_);
+}
+
+std::string Request::GetTypeName() const {
+  return "mozilla.appservices.httpconfig.protobuf.Request";
+}
+
+
+// ===================================================================
+
+Response_HeadersEntry_DoNotUse::Response_HeadersEntry_DoNotUse() {}
+Response_HeadersEntry_DoNotUse::Response_HeadersEntry_DoNotUse(::PROTOBUF_NAMESPACE_ID::Arena* arena)
+    : SuperType(arena) {}
+void Response_HeadersEntry_DoNotUse::MergeFrom(const Response_HeadersEntry_DoNotUse& other) {
+  MergeFromInternal(other);
+}
+
+// ===================================================================
+
+void Response::InitAsDefaultInstance() {
+}
+class Response::_Internal {
+ public:
+  using HasBits = decltype(std::declval<Response>()._has_bits_);
+  static void set_has_exception_message(HasBits* has_bits) {
+    (*has_bits)[0] |= 1u;
+  }
+  static void set_has_url(HasBits* has_bits) {
+    (*has_bits)[0] |= 2u;
+  }
+  static void set_has_status(HasBits* has_bits) {
+    (*has_bits)[0] |= 8u;
+  }
+  static void set_has_body(HasBits* has_bits) {
+    (*has_bits)[0] |= 4u;
+  }
+};
+
+Response::Response()
+  : ::PROTOBUF_NAMESPACE_ID::MessageLite(), _internal_metadata_(nullptr) {
+  SharedCtor();
+  // @@protoc_insertion_point(constructor:mozilla.appservices.httpconfig.protobuf.Response)
+}
+Response::Response(const Response& from)
+  : ::PROTOBUF_NAMESPACE_ID::MessageLite(),
+      _internal_metadata_(nullptr),
+      _has_bits_(from._has_bits_) {
+  _internal_metadata_.MergeFrom(from._internal_metadata_);
+  headers_.MergeFrom(from.headers_);
+  exception_message_.UnsafeSetDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  if (from._internal_has_exception_message()) {
+    exception_message_.AssignWithDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), from.exception_message_);
+  }
+  url_.UnsafeSetDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  if (from._internal_has_url()) {
+    url_.AssignWithDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), from.url_);
+  }
+  body_.UnsafeSetDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  if (from._internal_has_body()) {
+    body_.AssignWithDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), from.body_);
+  }
+  status_ = from.status_;
+  // @@protoc_insertion_point(copy_constructor:mozilla.appservices.httpconfig.protobuf.Response)
+}
+
+void Response::SharedCtor() {
+  ::PROTOBUF_NAMESPACE_ID::internal::InitSCC(&scc_info_Response_fetch_5fmsg_5ftypes_2eproto.base);
+  exception_message_.UnsafeSetDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  url_.UnsafeSetDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  body_.UnsafeSetDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  status_ = 0;
+}
+
+Response::~Response() {
+  // @@protoc_insertion_point(destructor:mozilla.appservices.httpconfig.protobuf.Response)
+  SharedDtor();
+}
+
+void Response::SharedDtor() {
+  exception_message_.DestroyNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  url_.DestroyNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  body_.DestroyNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+
+void Response::SetCachedSize(int size) const {
+  _cached_size_.Set(size);
+}
+const Response& Response::default_instance() {
+  ::PROTOBUF_NAMESPACE_ID::internal::InitSCC(&::scc_info_Response_fetch_5fmsg_5ftypes_2eproto.base);
+  return *internal_default_instance();
+}
+
+
+void Response::Clear() {
+// @@protoc_insertion_point(message_clear_start:mozilla.appservices.httpconfig.protobuf.Response)
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  headers_.Clear();
+  cached_has_bits = _has_bits_[0];
+  if (cached_has_bits & 0x00000007u) {
+    if (cached_has_bits & 0x00000001u) {
+      exception_message_.ClearNonDefaultToEmptyNoArena();
+    }
+    if (cached_has_bits & 0x00000002u) {
+      url_.ClearNonDefaultToEmptyNoArena();
+    }
+    if (cached_has_bits & 0x00000004u) {
+      body_.ClearNonDefaultToEmptyNoArena();
+    }
+  }
+  status_ = 0;
+  _has_bits_.Clear();
+  _internal_metadata_.Clear();
+}
+
+const char* Response::_InternalParse(const char* ptr, ::PROTOBUF_NAMESPACE_ID::internal::ParseContext* ctx) {
+#define CHK_(x) if (PROTOBUF_PREDICT_FALSE(!(x))) goto failure
+  _Internal::HasBits has_bits{};
+  while (!ctx->Done(&ptr)) {
+    ::PROTOBUF_NAMESPACE_ID::uint32 tag;
+    ptr = ::PROTOBUF_NAMESPACE_ID::internal::ReadTag(ptr, &tag);
+    CHK_(ptr);
+    switch (tag >> 3) {
+      // optional string exception_message = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 10)) {
+          auto str = _internal_mutable_exception_message();
+          ptr = ::PROTOBUF_NAMESPACE_ID::internal::InlineGreedyStringParser(str, ptr, ctx);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      // optional string url = 2;
+      case 2:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 18)) {
+          auto str = _internal_mutable_url();
+          ptr = ::PROTOBUF_NAMESPACE_ID::internal::InlineGreedyStringParser(str, ptr, ctx);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      // optional int32 status = 3;
+      case 3:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 24)) {
+          _Internal::set_has_status(&has_bits);
+          status_ = ::PROTOBUF_NAMESPACE_ID::internal::ReadVarint(&ptr);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      // optional bytes body = 4;
+      case 4:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 34)) {
+          auto str = _internal_mutable_body();
+          ptr = ::PROTOBUF_NAMESPACE_ID::internal::InlineGreedyStringParser(str, ptr, ctx);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      // map<string, string> headers = 5;
+      case 5:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 42)) {
+          ptr -= 1;
+          do {
+            ptr += 1;
+            ptr = ctx->ParseMessage(&headers_, ptr);
+            CHK_(ptr);
+            if (!ctx->DataAvailable(ptr)) break;
+          } while (::PROTOBUF_NAMESPACE_ID::internal::ExpectTag<42>(ptr));
+        } else goto handle_unusual;
+        continue;
+      default: {
+      handle_unusual:
+        if ((tag & 7) == 4 || tag == 0) {
+          ctx->SetLastTag(tag);
+          goto success;
+        }
+        ptr = UnknownFieldParse(tag, &_internal_metadata_, ptr, ctx);
+        CHK_(ptr != nullptr);
+        continue;
+      }
+    }  // switch
+  }  // while
+success:
+  _has_bits_.Or(has_bits);
+  return ptr;
+failure:
+  ptr = nullptr;
+  goto success;
+#undef CHK_
+}
+
+::PROTOBUF_NAMESPACE_ID::uint8* Response::_InternalSerialize(
+    ::PROTOBUF_NAMESPACE_ID::uint8* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {
+  // @@protoc_insertion_point(serialize_to_array_start:mozilla.appservices.httpconfig.protobuf.Response)
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  cached_has_bits = _has_bits_[0];
+  // optional string exception_message = 1;
+  if (cached_has_bits & 0x00000001u) {
+    target = stream->WriteStringMaybeAliased(
+        1, this->_internal_exception_message(), target);
+  }
+
+  // optional string url = 2;
+  if (cached_has_bits & 0x00000002u) {
+    target = stream->WriteStringMaybeAliased(
+        2, this->_internal_url(), target);
+  }
+
+  // optional int32 status = 3;
+  if (cached_has_bits & 0x00000008u) {
+    target = stream->EnsureSpace(target);
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::WriteInt32ToArray(3, this->_internal_status(), target);
+  }
+
+  // optional bytes body = 4;
+  if (cached_has_bits & 0x00000004u) {
+    target = stream->WriteBytesMaybeAliased(
+        4, this->_internal_body(), target);
+  }
+
+  // map<string, string> headers = 5;
+  if (!this->_internal_headers().empty()) {
+    typedef ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::const_pointer
+        ConstPtr;
+    typedef ConstPtr SortItem;
+    typedef ::PROTOBUF_NAMESPACE_ID::internal::CompareByDerefFirst<SortItem> Less;
+    struct Utf8Check {
+      static void Check(ConstPtr p) {
+      }
+    };
+
+    if (stream->IsSerializationDeterministic() &&
+        this->_internal_headers().size() > 1) {
+      ::std::unique_ptr<SortItem[]> items(
+          new SortItem[this->_internal_headers().size()]);
+      typedef ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::size_type size_type;
+      size_type n = 0;
+      for (::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::const_iterator
+          it = this->_internal_headers().begin();
+          it != this->_internal_headers().end(); ++it, ++n) {
+        items[static_cast<ptrdiff_t>(n)] = SortItem(&*it);
+      }
+      ::std::sort(&items[0], &items[static_cast<ptrdiff_t>(n)], Less());
+      for (size_type i = 0; i < n; i++) {
+        target = Response_HeadersEntry_DoNotUse::Funcs::InternalSerialize(5, items[static_cast<ptrdiff_t>(i)]->first, items[static_cast<ptrdiff_t>(i)]->second, target, stream);
+        Utf8Check::Check(&(*items[static_cast<ptrdiff_t>(i)]));
+      }
+    } else {
+      for (::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::const_iterator
+          it = this->_internal_headers().begin();
+          it != this->_internal_headers().end(); ++it) {
+        target = Response_HeadersEntry_DoNotUse::Funcs::InternalSerialize(5, it->first, it->second, target, stream);
+        Utf8Check::Check(&(*it));
+      }
+    }
+  }
+
+  if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {
+    target = stream->WriteRaw(_internal_metadata_.unknown_fields().data(),
+        static_cast<int>(_internal_metadata_.unknown_fields().size()), target);
+  }
+  // @@protoc_insertion_point(serialize_to_array_end:mozilla.appservices.httpconfig.protobuf.Response)
+  return target;
+}
+
+size_t Response::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:mozilla.appservices.httpconfig.protobuf.Response)
+  size_t total_size = 0;
+
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  // map<string, string> headers = 5;
+  total_size += 1 *
+      ::PROTOBUF_NAMESPACE_ID::internal::FromIntSize(this->_internal_headers_size());
+  for (::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::const_iterator
+      it = this->_internal_headers().begin();
+      it != this->_internal_headers().end(); ++it) {
+    total_size += Response_HeadersEntry_DoNotUse::Funcs::ByteSizeLong(it->first, it->second);
+  }
+
+  cached_has_bits = _has_bits_[0];
+  if (cached_has_bits & 0x0000000fu) {
+    // optional string exception_message = 1;
+    if (cached_has_bits & 0x00000001u) {
+      total_size += 1 +
+        ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
+          this->_internal_exception_message());
+    }
+
+    // optional string url = 2;
+    if (cached_has_bits & 0x00000002u) {
+      total_size += 1 +
+        ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
+          this->_internal_url());
+    }
+
+    // optional bytes body = 4;
+    if (cached_has_bits & 0x00000004u) {
+      total_size += 1 +
+        ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::BytesSize(
+          this->_internal_body());
+    }
+
+    // optional int32 status = 3;
+    if (cached_has_bits & 0x00000008u) {
+      total_size += 1 +
+        ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::Int32Size(
+          this->_internal_status());
+    }
+
+  }
+  if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {
+    total_size += _internal_metadata_.unknown_fields().size();
+  }
+  int cached_size = ::PROTOBUF_NAMESPACE_ID::internal::ToCachedSize(total_size);
+  SetCachedSize(cached_size);
+  return total_size;
+}
+
+void Response::CheckTypeAndMergeFrom(
+    const ::PROTOBUF_NAMESPACE_ID::MessageLite& from) {
+  MergeFrom(*::PROTOBUF_NAMESPACE_ID::internal::DownCast<const Response*>(
+      &from));
+}
+
+void Response::MergeFrom(const Response& from) {
+// @@protoc_insertion_point(class_specific_merge_from_start:mozilla.appservices.httpconfig.protobuf.Response)
+  GOOGLE_DCHECK_NE(&from, this);
+  _internal_metadata_.MergeFrom(from._internal_metadata_);
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  headers_.MergeFrom(from.headers_);
+  cached_has_bits = from._has_bits_[0];
+  if (cached_has_bits & 0x0000000fu) {
+    if (cached_has_bits & 0x00000001u) {
+      _has_bits_[0] |= 0x00000001u;
+      exception_message_.AssignWithDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), from.exception_message_);
+    }
+    if (cached_has_bits & 0x00000002u) {
+      _has_bits_[0] |= 0x00000002u;
+      url_.AssignWithDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), from.url_);
+    }
+    if (cached_has_bits & 0x00000004u) {
+      _has_bits_[0] |= 0x00000004u;
+      body_.AssignWithDefault(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), from.body_);
+    }
+    if (cached_has_bits & 0x00000008u) {
+      status_ = from.status_;
+    }
+    _has_bits_[0] |= cached_has_bits;
+  }
+}
+
+void Response::CopyFrom(const Response& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:mozilla.appservices.httpconfig.protobuf.Response)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool Response::IsInitialized() const {
+  return true;
+}
+
+void Response::InternalSwap(Response* other) {
+  using std::swap;
+  _internal_metadata_.Swap(&other->_internal_metadata_);
+  swap(_has_bits_[0], other->_has_bits_[0]);
+  headers_.Swap(&other->headers_);
+  exception_message_.Swap(&other->exception_message_, &::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(),
+    GetArenaNoVirtual());
+  url_.Swap(&other->url_, &::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(),
+    GetArenaNoVirtual());
+  body_.Swap(&other->body_, &::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(),
+    GetArenaNoVirtual());
+  swap(status_, other->status_);
+}
+
+std::string Response::GetTypeName() const {
+  return "mozilla.appservices.httpconfig.protobuf.Response";
+}
+
+
+// @@protoc_insertion_point(namespace_scope)
+}  // namespace protobuf
+}  // namespace httpconfig
+}  // namespace appservices
+}  // namespace mozilla
+PROTOBUF_NAMESPACE_OPEN
+template<> PROTOBUF_NOINLINE ::mozilla::appservices::httpconfig::protobuf::Request_HeadersEntry_DoNotUse* Arena::CreateMaybeMessage< ::mozilla::appservices::httpconfig::protobuf::Request_HeadersEntry_DoNotUse >(Arena* arena) {
+  return Arena::CreateInternal< ::mozilla::appservices::httpconfig::protobuf::Request_HeadersEntry_DoNotUse >(arena);
+}
+template<> PROTOBUF_NOINLINE ::mozilla::appservices::httpconfig::protobuf::Request* Arena::CreateMaybeMessage< ::mozilla::appservices::httpconfig::protobuf::Request >(Arena* arena) {
+  return Arena::CreateInternal< ::mozilla::appservices::httpconfig::protobuf::Request >(arena);
+}
+template<> PROTOBUF_NOINLINE ::mozilla::appservices::httpconfig::protobuf::Response_HeadersEntry_DoNotUse* Arena::CreateMaybeMessage< ::mozilla::appservices::httpconfig::protobuf::Response_HeadersEntry_DoNotUse >(Arena* arena) {
+  return Arena::CreateInternal< ::mozilla::appservices::httpconfig::protobuf::Response_HeadersEntry_DoNotUse >(arena);
+}
+template<> PROTOBUF_NOINLINE ::mozilla::appservices::httpconfig::protobuf::Response* Arena::CreateMaybeMessage< ::mozilla::appservices::httpconfig::protobuf::Response >(Arena* arena) {
+  return Arena::CreateInternal< ::mozilla::appservices::httpconfig::protobuf::Response >(arena);
+}
+PROTOBUF_NAMESPACE_CLOSE
+
+// @@protoc_insertion_point(global_scope)
+#include <google/protobuf/port_undef.inc>
diff --git a/toolkit/components/viaduct/fetch_msg_types.pb.h b/toolkit/components/viaduct/fetch_msg_types.pb.h
new file mode 100644
index 0000000000..1eba75ed18
--- /dev/null
+++ b/toolkit/components/viaduct/fetch_msg_types.pb.h
@@ -0,0 +1,1294 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: fetch_msg_types.proto
+
+#ifndef GOOGLE_PROTOBUF_INCLUDED_fetch_5fmsg_5ftypes_2eproto
+#define GOOGLE_PROTOBUF_INCLUDED_fetch_5fmsg_5ftypes_2eproto
+
+#include <limits>
+#include <string>
+
+#include <google/protobuf/port_def.inc>
+#if PROTOBUF_VERSION < 3011000
+#error This file was generated by a newer version of protoc which is
+#error incompatible with your Protocol Buffer headers. Please update
+#error your headers.
+#endif
+#if 3011004 < PROTOBUF_MIN_PROTOC_VERSION
+#error This file was generated by an older version of protoc which is
+#error incompatible with your Protocol Buffer headers. Please
+#error regenerate this file with a newer version of protoc.
+#endif
+
+#include <google/protobuf/port_undef.inc>
+#include <google/protobuf/io/coded_stream.h>
+#include <google/protobuf/arena.h>
+#include <google/protobuf/arenastring.h>
+#include <google/protobuf/generated_message_table_driven.h>
+#include <google/protobuf/generated_message_util.h>
+#include <google/protobuf/inlined_string_field.h>
+#include <google/protobuf/metadata_lite.h>
+#include <google/protobuf/message_lite.h>
+#include <google/protobuf/repeated_field.h>  // IWYU pragma: export
+#include <google/protobuf/extension_set.h>  // IWYU pragma: export
+#include <google/protobuf/map.h>  // IWYU pragma: export
+#include <google/protobuf/map_entry_lite.h>
+#include <google/protobuf/map_field_lite.h>
+#include <google/protobuf/generated_enum_util.h>
+// @@protoc_insertion_point(includes)
+#include <google/protobuf/port_def.inc>
+#define PROTOBUF_INTERNAL_EXPORT_fetch_5fmsg_5ftypes_2eproto
+PROTOBUF_NAMESPACE_OPEN
+namespace internal {
+class AnyMetadata;
+}  // namespace internal
+PROTOBUF_NAMESPACE_CLOSE
+
+// Internal implementation detail -- do not use these members.
+struct TableStruct_fetch_5fmsg_5ftypes_2eproto {
+  static const ::PROTOBUF_NAMESPACE_ID::internal::ParseTableField entries[]
+    PROTOBUF_SECTION_VARIABLE(protodesc_cold);
+  static const ::PROTOBUF_NAMESPACE_ID::internal::AuxillaryParseTableField aux[]
+    PROTOBUF_SECTION_VARIABLE(protodesc_cold);
+  static const ::PROTOBUF_NAMESPACE_ID::internal::ParseTable schema[4]
+    PROTOBUF_SECTION_VARIABLE(protodesc_cold);
+  static const ::PROTOBUF_NAMESPACE_ID::internal::FieldMetadata field_metadata[];
+  static const ::PROTOBUF_NAMESPACE_ID::internal::SerializationTable serialization_table[];
+  static const ::PROTOBUF_NAMESPACE_ID::uint32 offsets[];
+};
+namespace mozilla {
+namespace appservices {
+namespace httpconfig {
+namespace protobuf {
+class Request;
+class RequestDefaultTypeInternal;
+extern RequestDefaultTypeInternal _Request_default_instance_;
+class Request_HeadersEntry_DoNotUse;
+class Request_HeadersEntry_DoNotUseDefaultTypeInternal;
+extern Request_HeadersEntry_DoNotUseDefaultTypeInternal _Request_HeadersEntry_DoNotUse_default_instance_;
+class Response;
+class ResponseDefaultTypeInternal;
+extern ResponseDefaultTypeInternal _Response_default_instance_;
+class Response_HeadersEntry_DoNotUse;
+class Response_HeadersEntry_DoNotUseDefaultTypeInternal;
+extern Response_HeadersEntry_DoNotUseDefaultTypeInternal _Response_HeadersEntry_DoNotUse_default_instance_;
+}  // namespace protobuf
+}  // namespace httpconfig
+}  // namespace appservices
+}  // namespace mozilla
+PROTOBUF_NAMESPACE_OPEN
+template<> ::mozilla::appservices::httpconfig::protobuf::Request* Arena::CreateMaybeMessage<::mozilla::appservices::httpconfig::protobuf::Request>(Arena*);
+template<> ::mozilla::appservices::httpconfig::protobuf::Request_HeadersEntry_DoNotUse* Arena::CreateMaybeMessage<::mozilla::appservices::httpconfig::protobuf::Request_HeadersEntry_DoNotUse>(Arena*);
+template<> ::mozilla::appservices::httpconfig::protobuf::Response* Arena::CreateMaybeMessage<::mozilla::appservices::httpconfig::protobuf::Response>(Arena*);
+template<> ::mozilla::appservices::httpconfig::protobuf::Response_HeadersEntry_DoNotUse* Arena::CreateMaybeMessage<::mozilla::appservices::httpconfig::protobuf::Response_HeadersEntry_DoNotUse>(Arena*);
+PROTOBUF_NAMESPACE_CLOSE
+namespace mozilla {
+namespace appservices {
+namespace httpconfig {
+namespace protobuf {
+
+enum Request_Method : int {
+  Request_Method_GET = 0,
+  Request_Method_HEAD = 1,
+  Request_Method_POST = 2,
+  Request_Method_PUT = 3,
+  Request_Method_DELETE = 4,
+  Request_Method_CONNECT = 5,
+  Request_Method_OPTIONS = 6,
+  Request_Method_TRACE = 7
+};
+bool Request_Method_IsValid(int value);
+constexpr Request_Method Request_Method_Method_MIN = Request_Method_GET;
+constexpr Request_Method Request_Method_Method_MAX = Request_Method_TRACE;
+constexpr int Request_Method_Method_ARRAYSIZE = Request_Method_Method_MAX + 1;
+
+const std::string& Request_Method_Name(Request_Method value);
+template<typename T>
+inline const std::string& Request_Method_Name(T enum_t_value) {
+  static_assert(::std::is_same<T, Request_Method>::value ||
+    ::std::is_integral<T>::value,
+    "Incorrect type passed to function Request_Method_Name.");
+  return Request_Method_Name(static_cast<Request_Method>(enum_t_value));
+}
+bool Request_Method_Parse(
+    const std::string& name, Request_Method* value);
+// ===================================================================
+
+class Request_HeadersEntry_DoNotUse : public ::PROTOBUF_NAMESPACE_ID::internal::MapEntryLite<Request_HeadersEntry_DoNotUse, 
+    std::string, std::string,
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+    0 > {
+public:
+  typedef ::PROTOBUF_NAMESPACE_ID::internal::MapEntryLite<Request_HeadersEntry_DoNotUse, 
+    std::string, std::string,
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+    0 > SuperType;
+  Request_HeadersEntry_DoNotUse();
+  explicit Request_HeadersEntry_DoNotUse(::PROTOBUF_NAMESPACE_ID::Arena* arena);
+  void MergeFrom(const Request_HeadersEntry_DoNotUse& other);
+  static const Request_HeadersEntry_DoNotUse* internal_default_instance() { return reinterpret_cast<const Request_HeadersEntry_DoNotUse*>(&_Request_HeadersEntry_DoNotUse_default_instance_); }
+  static bool ValidateKey(void*) { return true; }
+  static bool ValidateValue(void*) { return true; }
+};
+
+// -------------------------------------------------------------------
+
+class Request :
+    public ::PROTOBUF_NAMESPACE_ID::MessageLite /* @@protoc_insertion_point(class_definition:mozilla.appservices.httpconfig.protobuf.Request) */ {
+ public:
+  Request();
+  virtual ~Request();
+
+  Request(const Request& from);
+  Request(Request&& from) noexcept
+    : Request() {
+    *this = ::std::move(from);
+  }
+
+  inline Request& operator=(const Request& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline Request& operator=(Request&& from) noexcept {
+    if (GetArenaNoVirtual() == from.GetArenaNoVirtual()) {
+      if (this != &from) InternalSwap(&from);
+    } else {
+      CopyFrom(from);
+    }
+    return *this;
+  }
+
+  inline const std::string& unknown_fields() const {
+    return _internal_metadata_.unknown_fields();
+  }
+  inline std::string* mutable_unknown_fields() {
+    return _internal_metadata_.mutable_unknown_fields();
+  }
+
+  static const Request& default_instance();
+
+  static void InitAsDefaultInstance();  // FOR INTERNAL USE ONLY
+  static inline const Request* internal_default_instance() {
+    return reinterpret_cast<const Request*>(
+               &_Request_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    1;
+
+  friend void swap(Request& a, Request& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(Request* other) {
+    if (other == this) return;
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  inline Request* New() const final {
+    return CreateMaybeMessage<Request>(nullptr);
+  }
+
+  Request* New(::PROTOBUF_NAMESPACE_ID::Arena* arena) const final {
+    return CreateMaybeMessage<Request>(arena);
+  }
+  void CheckTypeAndMergeFrom(const ::PROTOBUF_NAMESPACE_ID::MessageLite& from)
+    final;
+  void CopyFrom(const Request& from);
+  void MergeFrom(const Request& from);
+  PROTOBUF_ATTRIBUTE_REINITIALIZES void Clear() final;
+  bool IsInitialized() const final;
+
+  size_t ByteSizeLong() const final;
+  const char* _InternalParse(const char* ptr, ::PROTOBUF_NAMESPACE_ID::internal::ParseContext* ctx) final;
+  ::PROTOBUF_NAMESPACE_ID::uint8* _InternalSerialize(
+      ::PROTOBUF_NAMESPACE_ID::uint8* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const final;
+  void DiscardUnknownFields();
+  int GetCachedSize() const final { return _cached_size_.Get(); }
+
+  private:
+  inline void SharedCtor();
+  inline void SharedDtor();
+  void SetCachedSize(int size) const;
+  void InternalSwap(Request* other);
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "mozilla.appservices.httpconfig.protobuf.Request";
+  }
+  private:
+  inline ::PROTOBUF_NAMESPACE_ID::Arena* GetArenaNoVirtual() const {
+    return nullptr;
+  }
+  inline void* MaybeArenaPtr() const {
+    return nullptr;
+  }
+  public:
+
+  std::string GetTypeName() const final;
+
+  // nested types ----------------------------------------------------
+
+
+  typedef Request_Method Method;
+  static constexpr Method GET =
+    Request_Method_GET;
+  static constexpr Method HEAD =
+    Request_Method_HEAD;
+  static constexpr Method POST =
+    Request_Method_POST;
+  static constexpr Method PUT =
+    Request_Method_PUT;
+  static constexpr Method DELETE =
+    Request_Method_DELETE;
+  static constexpr Method CONNECT =
+    Request_Method_CONNECT;
+  static constexpr Method OPTIONS =
+    Request_Method_OPTIONS;
+  static constexpr Method TRACE =
+    Request_Method_TRACE;
+  static inline bool Method_IsValid(int value) {
+    return Request_Method_IsValid(value);
+  }
+  static constexpr Method Method_MIN =
+    Request_Method_Method_MIN;
+  static constexpr Method Method_MAX =
+    Request_Method_Method_MAX;
+  static constexpr int Method_ARRAYSIZE =
+    Request_Method_Method_ARRAYSIZE;
+  template<typename T>
+  static inline const std::string& Method_Name(T enum_t_value) {
+    static_assert(::std::is_same<T, Method>::value ||
+      ::std::is_integral<T>::value,
+      "Incorrect type passed to function Method_Name.");
+    return Request_Method_Name(enum_t_value);
+  }
+  static inline bool Method_Parse(const std::string& name,
+      Method* value) {
+    return Request_Method_Parse(name, value);
+  }
+
+  // accessors -------------------------------------------------------
+
+  enum : int {
+    kHeadersFieldNumber = 4,
+    kUrlFieldNumber = 2,
+    kBodyFieldNumber = 3,
+    kMethodFieldNumber = 1,
+    kFollowRedirectsFieldNumber = 5,
+    kUseCachesFieldNumber = 6,
+    kConnectTimeoutSecsFieldNumber = 7,
+    kReadTimeoutSecsFieldNumber = 8,
+  };
+  // map<string, string> headers = 4;
+  int headers_size() const;
+  private:
+  int _internal_headers_size() const;
+  public:
+  void clear_headers();
+  private:
+  const ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >&
+      _internal_headers() const;
+  ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >*
+      _internal_mutable_headers();
+  public:
+  const ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >&
+      headers() const;
+  ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >*
+      mutable_headers();
+
+  // required string url = 2;
+  bool has_url() const;
+  private:
+  bool _internal_has_url() const;
+  public:
+  void clear_url();
+  const std::string& url() const;
+  void set_url(const std::string& value);
+  void set_url(std::string&& value);
+  void set_url(const char* value);
+  void set_url(const char* value, size_t size);
+  std::string* mutable_url();
+  std::string* release_url();
+  void set_allocated_url(std::string* url);
+  private:
+  const std::string& _internal_url() const;
+  void _internal_set_url(const std::string& value);
+  std::string* _internal_mutable_url();
+  public:
+
+  // optional bytes body = 3;
+  bool has_body() const;
+  private:
+  bool _internal_has_body() const;
+  public:
+  void clear_body();
+  const std::string& body() const;
+  void set_body(const std::string& value);
+  void set_body(std::string&& value);
+  void set_body(const char* value);
+  void set_body(const void* value, size_t size);
+  std::string* mutable_body();
+  std::string* release_body();
+  void set_allocated_body(std::string* body);
+  private:
+  const std::string& _internal_body() const;
+  void _internal_set_body(const std::string& value);
+  std::string* _internal_mutable_body();
+  public:
+
+  // required .mozilla.appservices.httpconfig.protobuf.Request.Method method = 1;
+  bool has_method() const;
+  private:
+  bool _internal_has_method() const;
+  public:
+  void clear_method();
+  ::mozilla::appservices::httpconfig::protobuf::Request_Method method() const;
+  void set_method(::mozilla::appservices::httpconfig::protobuf::Request_Method value);
+  private:
+  ::mozilla::appservices::httpconfig::protobuf::Request_Method _internal_method() const;
+  void _internal_set_method(::mozilla::appservices::httpconfig::protobuf::Request_Method value);
+  public:
+
+  // required bool follow_redirects = 5;
+  bool has_follow_redirects() const;
+  private:
+  bool _internal_has_follow_redirects() const;
+  public:
+  void clear_follow_redirects();
+  bool follow_redirects() const;
+  void set_follow_redirects(bool value);
+  private:
+  bool _internal_follow_redirects() const;
+  void _internal_set_follow_redirects(bool value);
+  public:
+
+  // required bool use_caches = 6;
+  bool has_use_caches() const;
+  private:
+  bool _internal_has_use_caches() const;
+  public:
+  void clear_use_caches();
+  bool use_caches() const;
+  void set_use_caches(bool value);
+  private:
+  bool _internal_use_caches() const;
+  void _internal_set_use_caches(bool value);
+  public:
+
+  // required int32 connect_timeout_secs = 7;
+  bool has_connect_timeout_secs() const;
+  private:
+  bool _internal_has_connect_timeout_secs() const;
+  public:
+  void clear_connect_timeout_secs();
+  ::PROTOBUF_NAMESPACE_ID::int32 connect_timeout_secs() const;
+  void set_connect_timeout_secs(::PROTOBUF_NAMESPACE_ID::int32 value);
+  private:
+  ::PROTOBUF_NAMESPACE_ID::int32 _internal_connect_timeout_secs() const;
+  void _internal_set_connect_timeout_secs(::PROTOBUF_NAMESPACE_ID::int32 value);
+  public:
+
+  // required int32 read_timeout_secs = 8;
+  bool has_read_timeout_secs() const;
+  private:
+  bool _internal_has_read_timeout_secs() const;
+  public:
+  void clear_read_timeout_secs();
+  ::PROTOBUF_NAMESPACE_ID::int32 read_timeout_secs() const;
+  void set_read_timeout_secs(::PROTOBUF_NAMESPACE_ID::int32 value);
+  private:
+  ::PROTOBUF_NAMESPACE_ID::int32 _internal_read_timeout_secs() const;
+  void _internal_set_read_timeout_secs(::PROTOBUF_NAMESPACE_ID::int32 value);
+  public:
+
+  // @@protoc_insertion_point(class_scope:mozilla.appservices.httpconfig.protobuf.Request)
+ private:
+  class _Internal;
+
+  // helper for ByteSizeLong()
+  size_t RequiredFieldsByteSizeFallback() const;
+
+  ::PROTOBUF_NAMESPACE_ID::internal::InternalMetadataWithArenaLite _internal_metadata_;
+  ::PROTOBUF_NAMESPACE_ID::internal::HasBits<1> _has_bits_;
+  mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  ::PROTOBUF_NAMESPACE_ID::internal::MapFieldLite<
+      Request_HeadersEntry_DoNotUse,
+      std::string, std::string,
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+      0 > headers_;
+  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr url_;
+  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr body_;
+  int method_;
+  bool follow_redirects_;
+  bool use_caches_;
+  ::PROTOBUF_NAMESPACE_ID::int32 connect_timeout_secs_;
+  ::PROTOBUF_NAMESPACE_ID::int32 read_timeout_secs_;
+  friend struct ::TableStruct_fetch_5fmsg_5ftypes_2eproto;
+};
+// -------------------------------------------------------------------
+
+class Response_HeadersEntry_DoNotUse : public ::PROTOBUF_NAMESPACE_ID::internal::MapEntryLite<Response_HeadersEntry_DoNotUse, 
+    std::string, std::string,
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+    0 > {
+public:
+  typedef ::PROTOBUF_NAMESPACE_ID::internal::MapEntryLite<Response_HeadersEntry_DoNotUse, 
+    std::string, std::string,
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+    0 > SuperType;
+  Response_HeadersEntry_DoNotUse();
+  explicit Response_HeadersEntry_DoNotUse(::PROTOBUF_NAMESPACE_ID::Arena* arena);
+  void MergeFrom(const Response_HeadersEntry_DoNotUse& other);
+  static const Response_HeadersEntry_DoNotUse* internal_default_instance() { return reinterpret_cast<const Response_HeadersEntry_DoNotUse*>(&_Response_HeadersEntry_DoNotUse_default_instance_); }
+  static bool ValidateKey(void*) { return true; }
+  static bool ValidateValue(void*) { return true; }
+};
+
+// -------------------------------------------------------------------
+
+class Response :
+    public ::PROTOBUF_NAMESPACE_ID::MessageLite /* @@protoc_insertion_point(class_definition:mozilla.appservices.httpconfig.protobuf.Response) */ {
+ public:
+  Response();
+  virtual ~Response();
+
+  Response(const Response& from);
+  Response(Response&& from) noexcept
+    : Response() {
+    *this = ::std::move(from);
+  }
+
+  inline Response& operator=(const Response& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline Response& operator=(Response&& from) noexcept {
+    if (GetArenaNoVirtual() == from.GetArenaNoVirtual()) {
+      if (this != &from) InternalSwap(&from);
+    } else {
+      CopyFrom(from);
+    }
+    return *this;
+  }
+
+  inline const std::string& unknown_fields() const {
+    return _internal_metadata_.unknown_fields();
+  }
+  inline std::string* mutable_unknown_fields() {
+    return _internal_metadata_.mutable_unknown_fields();
+  }
+
+  static const Response& default_instance();
+
+  static void InitAsDefaultInstance();  // FOR INTERNAL USE ONLY
+  static inline const Response* internal_default_instance() {
+    return reinterpret_cast<const Response*>(
+               &_Response_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    3;
+
+  friend void swap(Response& a, Response& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(Response* other) {
+    if (other == this) return;
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  inline Response* New() const final {
+    return CreateMaybeMessage<Response>(nullptr);
+  }
+
+  Response* New(::PROTOBUF_NAMESPACE_ID::Arena* arena) const final {
+    return CreateMaybeMessage<Response>(arena);
+  }
+  void CheckTypeAndMergeFrom(const ::PROTOBUF_NAMESPACE_ID::MessageLite& from)
+    final;
+  void CopyFrom(const Response& from);
+  void MergeFrom(const Response& from);
+  PROTOBUF_ATTRIBUTE_REINITIALIZES void Clear() final;
+  bool IsInitialized() const final;
+
+  size_t ByteSizeLong() const final;
+  const char* _InternalParse(const char* ptr, ::PROTOBUF_NAMESPACE_ID::internal::ParseContext* ctx) final;
+  ::PROTOBUF_NAMESPACE_ID::uint8* _InternalSerialize(
+      ::PROTOBUF_NAMESPACE_ID::uint8* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const final;
+  void DiscardUnknownFields();
+  int GetCachedSize() const final { return _cached_size_.Get(); }
+
+  private:
+  inline void SharedCtor();
+  inline void SharedDtor();
+  void SetCachedSize(int size) const;
+  void InternalSwap(Response* other);
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "mozilla.appservices.httpconfig.protobuf.Response";
+  }
+  private:
+  inline ::PROTOBUF_NAMESPACE_ID::Arena* GetArenaNoVirtual() const {
+    return nullptr;
+  }
+  inline void* MaybeArenaPtr() const {
+    return nullptr;
+  }
+  public:
+
+  std::string GetTypeName() const final;
+
+  // nested types ----------------------------------------------------
+
+
+  // accessors -------------------------------------------------------
+
+  enum : int {
+    kHeadersFieldNumber = 5,
+    kExceptionMessageFieldNumber = 1,
+    kUrlFieldNumber = 2,
+    kBodyFieldNumber = 4,
+    kStatusFieldNumber = 3,
+  };
+  // map<string, string> headers = 5;
+  int headers_size() const;
+  private:
+  int _internal_headers_size() const;
+  public:
+  void clear_headers();
+  private:
+  const ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >&
+      _internal_headers() const;
+  ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >*
+      _internal_mutable_headers();
+  public:
+  const ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >&
+      headers() const;
+  ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >*
+      mutable_headers();
+
+  // optional string exception_message = 1;
+  bool has_exception_message() const;
+  private:
+  bool _internal_has_exception_message() const;
+  public:
+  void clear_exception_message();
+  const std::string& exception_message() const;
+  void set_exception_message(const std::string& value);
+  void set_exception_message(std::string&& value);
+  void set_exception_message(const char* value);
+  void set_exception_message(const char* value, size_t size);
+  std::string* mutable_exception_message();
+  std::string* release_exception_message();
+  void set_allocated_exception_message(std::string* exception_message);
+  private:
+  const std::string& _internal_exception_message() const;
+  void _internal_set_exception_message(const std::string& value);
+  std::string* _internal_mutable_exception_message();
+  public:
+
+  // optional string url = 2;
+  bool has_url() const;
+  private:
+  bool _internal_has_url() const;
+  public:
+  void clear_url();
+  const std::string& url() const;
+  void set_url(const std::string& value);
+  void set_url(std::string&& value);
+  void set_url(const char* value);
+  void set_url(const char* value, size_t size);
+  std::string* mutable_url();
+  std::string* release_url();
+  void set_allocated_url(std::string* url);
+  private:
+  const std::string& _internal_url() const;
+  void _internal_set_url(const std::string& value);
+  std::string* _internal_mutable_url();
+  public:
+
+  // optional bytes body = 4;
+  bool has_body() const;
+  private:
+  bool _internal_has_body() const;
+  public:
+  void clear_body();
+  const std::string& body() const;
+  void set_body(const std::string& value);
+  void set_body(std::string&& value);
+  void set_body(const char* value);
+  void set_body(const void* value, size_t size);
+  std::string* mutable_body();
+  std::string* release_body();
+  void set_allocated_body(std::string* body);
+  private:
+  const std::string& _internal_body() const;
+  void _internal_set_body(const std::string& value);
+  std::string* _internal_mutable_body();
+  public:
+
+  // optional int32 status = 3;
+  bool has_status() const;
+  private:
+  bool _internal_has_status() const;
+  public:
+  void clear_status();
+  ::PROTOBUF_NAMESPACE_ID::int32 status() const;
+  void set_status(::PROTOBUF_NAMESPACE_ID::int32 value);
+  private:
+  ::PROTOBUF_NAMESPACE_ID::int32 _internal_status() const;
+  void _internal_set_status(::PROTOBUF_NAMESPACE_ID::int32 value);
+  public:
+
+  // @@protoc_insertion_point(class_scope:mozilla.appservices.httpconfig.protobuf.Response)
+ private:
+  class _Internal;
+
+  ::PROTOBUF_NAMESPACE_ID::internal::InternalMetadataWithArenaLite _internal_metadata_;
+  ::PROTOBUF_NAMESPACE_ID::internal::HasBits<1> _has_bits_;
+  mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  ::PROTOBUF_NAMESPACE_ID::internal::MapFieldLite<
+      Response_HeadersEntry_DoNotUse,
+      std::string, std::string,
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
+      0 > headers_;
+  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr exception_message_;
+  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr url_;
+  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr body_;
+  ::PROTOBUF_NAMESPACE_ID::int32 status_;
+  friend struct ::TableStruct_fetch_5fmsg_5ftypes_2eproto;
+};
+// ===================================================================
+
+
+// ===================================================================
+
+#ifdef __GNUC__
+  #pragma GCC diagnostic push
+  #pragma GCC diagnostic ignored "-Wstrict-aliasing"
+#endif  // __GNUC__
+// -------------------------------------------------------------------
+
+// Request
+
+// required .mozilla.appservices.httpconfig.protobuf.Request.Method method = 1;
+inline bool Request::_internal_has_method() const {
+  bool value = (_has_bits_[0] & 0x00000004u) != 0;
+  return value;
+}
+inline bool Request::has_method() const {
+  return _internal_has_method();
+}
+inline void Request::clear_method() {
+  method_ = 0;
+  _has_bits_[0] &= ~0x00000004u;
+}
+inline ::mozilla::appservices::httpconfig::protobuf::Request_Method Request::_internal_method() const {
+  return static_cast< ::mozilla::appservices::httpconfig::protobuf::Request_Method >(method_);
+}
+inline ::mozilla::appservices::httpconfig::protobuf::Request_Method Request::method() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Request.method)
+  return _internal_method();
+}
+inline void Request::_internal_set_method(::mozilla::appservices::httpconfig::protobuf::Request_Method value) {
+  assert(::mozilla::appservices::httpconfig::protobuf::Request_Method_IsValid(value));
+  _has_bits_[0] |= 0x00000004u;
+  method_ = value;
+}
+inline void Request::set_method(::mozilla::appservices::httpconfig::protobuf::Request_Method value) {
+  _internal_set_method(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Request.method)
+}
+
+// required string url = 2;
+inline bool Request::_internal_has_url() const {
+  bool value = (_has_bits_[0] & 0x00000001u) != 0;
+  return value;
+}
+inline bool Request::has_url() const {
+  return _internal_has_url();
+}
+inline void Request::clear_url() {
+  url_.ClearToEmptyNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  _has_bits_[0] &= ~0x00000001u;
+}
+inline const std::string& Request::url() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Request.url)
+  return _internal_url();
+}
+inline void Request::set_url(const std::string& value) {
+  _internal_set_url(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Request.url)
+}
+inline std::string* Request::mutable_url() {
+  // @@protoc_insertion_point(field_mutable:mozilla.appservices.httpconfig.protobuf.Request.url)
+  return _internal_mutable_url();
+}
+inline const std::string& Request::_internal_url() const {
+  return url_.GetNoArena();
+}
+inline void Request::_internal_set_url(const std::string& value) {
+  _has_bits_[0] |= 0x00000001u;
+  url_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), value);
+}
+inline void Request::set_url(std::string&& value) {
+  _has_bits_[0] |= 0x00000001u;
+  url_.SetNoArena(
+    &::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), ::std::move(value));
+  // @@protoc_insertion_point(field_set_rvalue:mozilla.appservices.httpconfig.protobuf.Request.url)
+}
+inline void Request::set_url(const char* value) {
+  GOOGLE_DCHECK(value != nullptr);
+  _has_bits_[0] |= 0x00000001u;
+  url_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
+  // @@protoc_insertion_point(field_set_char:mozilla.appservices.httpconfig.protobuf.Request.url)
+}
+inline void Request::set_url(const char* value, size_t size) {
+  _has_bits_[0] |= 0x00000001u;
+  url_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(),
+      ::std::string(reinterpret_cast<const char*>(value), size));
+  // @@protoc_insertion_point(field_set_pointer:mozilla.appservices.httpconfig.protobuf.Request.url)
+}
+inline std::string* Request::_internal_mutable_url() {
+  _has_bits_[0] |= 0x00000001u;
+  return url_.MutableNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+inline std::string* Request::release_url() {
+  // @@protoc_insertion_point(field_release:mozilla.appservices.httpconfig.protobuf.Request.url)
+  if (!_internal_has_url()) {
+    return nullptr;
+  }
+  _has_bits_[0] &= ~0x00000001u;
+  return url_.ReleaseNonDefaultNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+inline void Request::set_allocated_url(std::string* url) {
+  if (url != nullptr) {
+    _has_bits_[0] |= 0x00000001u;
+  } else {
+    _has_bits_[0] &= ~0x00000001u;
+  }
+  url_.SetAllocatedNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), url);
+  // @@protoc_insertion_point(field_set_allocated:mozilla.appservices.httpconfig.protobuf.Request.url)
+}
+
+// optional bytes body = 3;
+inline bool Request::_internal_has_body() const {
+  bool value = (_has_bits_[0] & 0x00000002u) != 0;
+  return value;
+}
+inline bool Request::has_body() const {
+  return _internal_has_body();
+}
+inline void Request::clear_body() {
+  body_.ClearToEmptyNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  _has_bits_[0] &= ~0x00000002u;
+}
+inline const std::string& Request::body() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Request.body)
+  return _internal_body();
+}
+inline void Request::set_body(const std::string& value) {
+  _internal_set_body(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Request.body)
+}
+inline std::string* Request::mutable_body() {
+  // @@protoc_insertion_point(field_mutable:mozilla.appservices.httpconfig.protobuf.Request.body)
+  return _internal_mutable_body();
+}
+inline const std::string& Request::_internal_body() const {
+  return body_.GetNoArena();
+}
+inline void Request::_internal_set_body(const std::string& value) {
+  _has_bits_[0] |= 0x00000002u;
+  body_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), value);
+}
+inline void Request::set_body(std::string&& value) {
+  _has_bits_[0] |= 0x00000002u;
+  body_.SetNoArena(
+    &::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), ::std::move(value));
+  // @@protoc_insertion_point(field_set_rvalue:mozilla.appservices.httpconfig.protobuf.Request.body)
+}
+inline void Request::set_body(const char* value) {
+  GOOGLE_DCHECK(value != nullptr);
+  _has_bits_[0] |= 0x00000002u;
+  body_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
+  // @@protoc_insertion_point(field_set_char:mozilla.appservices.httpconfig.protobuf.Request.body)
+}
+inline void Request::set_body(const void* value, size_t size) {
+  _has_bits_[0] |= 0x00000002u;
+  body_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(),
+      ::std::string(reinterpret_cast<const char*>(value), size));
+  // @@protoc_insertion_point(field_set_pointer:mozilla.appservices.httpconfig.protobuf.Request.body)
+}
+inline std::string* Request::_internal_mutable_body() {
+  _has_bits_[0] |= 0x00000002u;
+  return body_.MutableNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+inline std::string* Request::release_body() {
+  // @@protoc_insertion_point(field_release:mozilla.appservices.httpconfig.protobuf.Request.body)
+  if (!_internal_has_body()) {
+    return nullptr;
+  }
+  _has_bits_[0] &= ~0x00000002u;
+  return body_.ReleaseNonDefaultNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+inline void Request::set_allocated_body(std::string* body) {
+  if (body != nullptr) {
+    _has_bits_[0] |= 0x00000002u;
+  } else {
+    _has_bits_[0] &= ~0x00000002u;
+  }
+  body_.SetAllocatedNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), body);
+  // @@protoc_insertion_point(field_set_allocated:mozilla.appservices.httpconfig.protobuf.Request.body)
+}
+
+// map<string, string> headers = 4;
+inline int Request::_internal_headers_size() const {
+  return headers_.size();
+}
+inline int Request::headers_size() const {
+  return _internal_headers_size();
+}
+inline void Request::clear_headers() {
+  headers_.Clear();
+}
+inline const ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >&
+Request::_internal_headers() const {
+  return headers_.GetMap();
+}
+inline const ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >&
+Request::headers() const {
+  // @@protoc_insertion_point(field_map:mozilla.appservices.httpconfig.protobuf.Request.headers)
+  return _internal_headers();
+}
+inline ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >*
+Request::_internal_mutable_headers() {
+  return headers_.MutableMap();
+}
+inline ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >*
+Request::mutable_headers() {
+  // @@protoc_insertion_point(field_mutable_map:mozilla.appservices.httpconfig.protobuf.Request.headers)
+  return _internal_mutable_headers();
+}
+
+// required bool follow_redirects = 5;
+inline bool Request::_internal_has_follow_redirects() const {
+  bool value = (_has_bits_[0] & 0x00000008u) != 0;
+  return value;
+}
+inline bool Request::has_follow_redirects() const {
+  return _internal_has_follow_redirects();
+}
+inline void Request::clear_follow_redirects() {
+  follow_redirects_ = false;
+  _has_bits_[0] &= ~0x00000008u;
+}
+inline bool Request::_internal_follow_redirects() const {
+  return follow_redirects_;
+}
+inline bool Request::follow_redirects() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Request.follow_redirects)
+  return _internal_follow_redirects();
+}
+inline void Request::_internal_set_follow_redirects(bool value) {
+  _has_bits_[0] |= 0x00000008u;
+  follow_redirects_ = value;
+}
+inline void Request::set_follow_redirects(bool value) {
+  _internal_set_follow_redirects(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Request.follow_redirects)
+}
+
+// required bool use_caches = 6;
+inline bool Request::_internal_has_use_caches() const {
+  bool value = (_has_bits_[0] & 0x00000010u) != 0;
+  return value;
+}
+inline bool Request::has_use_caches() const {
+  return _internal_has_use_caches();
+}
+inline void Request::clear_use_caches() {
+  use_caches_ = false;
+  _has_bits_[0] &= ~0x00000010u;
+}
+inline bool Request::_internal_use_caches() const {
+  return use_caches_;
+}
+inline bool Request::use_caches() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Request.use_caches)
+  return _internal_use_caches();
+}
+inline void Request::_internal_set_use_caches(bool value) {
+  _has_bits_[0] |= 0x00000010u;
+  use_caches_ = value;
+}
+inline void Request::set_use_caches(bool value) {
+  _internal_set_use_caches(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Request.use_caches)
+}
+
+// required int32 connect_timeout_secs = 7;
+inline bool Request::_internal_has_connect_timeout_secs() const {
+  bool value = (_has_bits_[0] & 0x00000020u) != 0;
+  return value;
+}
+inline bool Request::has_connect_timeout_secs() const {
+  return _internal_has_connect_timeout_secs();
+}
+inline void Request::clear_connect_timeout_secs() {
+  connect_timeout_secs_ = 0;
+  _has_bits_[0] &= ~0x00000020u;
+}
+inline ::PROTOBUF_NAMESPACE_ID::int32 Request::_internal_connect_timeout_secs() const {
+  return connect_timeout_secs_;
+}
+inline ::PROTOBUF_NAMESPACE_ID::int32 Request::connect_timeout_secs() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Request.connect_timeout_secs)
+  return _internal_connect_timeout_secs();
+}
+inline void Request::_internal_set_connect_timeout_secs(::PROTOBUF_NAMESPACE_ID::int32 value) {
+  _has_bits_[0] |= 0x00000020u;
+  connect_timeout_secs_ = value;
+}
+inline void Request::set_connect_timeout_secs(::PROTOBUF_NAMESPACE_ID::int32 value) {
+  _internal_set_connect_timeout_secs(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Request.connect_timeout_secs)
+}
+
+// required int32 read_timeout_secs = 8;
+inline bool Request::_internal_has_read_timeout_secs() const {
+  bool value = (_has_bits_[0] & 0x00000040u) != 0;
+  return value;
+}
+inline bool Request::has_read_timeout_secs() const {
+  return _internal_has_read_timeout_secs();
+}
+inline void Request::clear_read_timeout_secs() {
+  read_timeout_secs_ = 0;
+  _has_bits_[0] &= ~0x00000040u;
+}
+inline ::PROTOBUF_NAMESPACE_ID::int32 Request::_internal_read_timeout_secs() const {
+  return read_timeout_secs_;
+}
+inline ::PROTOBUF_NAMESPACE_ID::int32 Request::read_timeout_secs() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Request.read_timeout_secs)
+  return _internal_read_timeout_secs();
+}
+inline void Request::_internal_set_read_timeout_secs(::PROTOBUF_NAMESPACE_ID::int32 value) {
+  _has_bits_[0] |= 0x00000040u;
+  read_timeout_secs_ = value;
+}
+inline void Request::set_read_timeout_secs(::PROTOBUF_NAMESPACE_ID::int32 value) {
+  _internal_set_read_timeout_secs(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Request.read_timeout_secs)
+}
+
+// -------------------------------------------------------------------
+
+// -------------------------------------------------------------------
+
+// Response
+
+// optional string exception_message = 1;
+inline bool Response::_internal_has_exception_message() const {
+  bool value = (_has_bits_[0] & 0x00000001u) != 0;
+  return value;
+}
+inline bool Response::has_exception_message() const {
+  return _internal_has_exception_message();
+}
+inline void Response::clear_exception_message() {
+  exception_message_.ClearToEmptyNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  _has_bits_[0] &= ~0x00000001u;
+}
+inline const std::string& Response::exception_message() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Response.exception_message)
+  return _internal_exception_message();
+}
+inline void Response::set_exception_message(const std::string& value) {
+  _internal_set_exception_message(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Response.exception_message)
+}
+inline std::string* Response::mutable_exception_message() {
+  // @@protoc_insertion_point(field_mutable:mozilla.appservices.httpconfig.protobuf.Response.exception_message)
+  return _internal_mutable_exception_message();
+}
+inline const std::string& Response::_internal_exception_message() const {
+  return exception_message_.GetNoArena();
+}
+inline void Response::_internal_set_exception_message(const std::string& value) {
+  _has_bits_[0] |= 0x00000001u;
+  exception_message_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), value);
+}
+inline void Response::set_exception_message(std::string&& value) {
+  _has_bits_[0] |= 0x00000001u;
+  exception_message_.SetNoArena(
+    &::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), ::std::move(value));
+  // @@protoc_insertion_point(field_set_rvalue:mozilla.appservices.httpconfig.protobuf.Response.exception_message)
+}
+inline void Response::set_exception_message(const char* value) {
+  GOOGLE_DCHECK(value != nullptr);
+  _has_bits_[0] |= 0x00000001u;
+  exception_message_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
+  // @@protoc_insertion_point(field_set_char:mozilla.appservices.httpconfig.protobuf.Response.exception_message)
+}
+inline void Response::set_exception_message(const char* value, size_t size) {
+  _has_bits_[0] |= 0x00000001u;
+  exception_message_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(),
+      ::std::string(reinterpret_cast<const char*>(value), size));
+  // @@protoc_insertion_point(field_set_pointer:mozilla.appservices.httpconfig.protobuf.Response.exception_message)
+}
+inline std::string* Response::_internal_mutable_exception_message() {
+  _has_bits_[0] |= 0x00000001u;
+  return exception_message_.MutableNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+inline std::string* Response::release_exception_message() {
+  // @@protoc_insertion_point(field_release:mozilla.appservices.httpconfig.protobuf.Response.exception_message)
+  if (!_internal_has_exception_message()) {
+    return nullptr;
+  }
+  _has_bits_[0] &= ~0x00000001u;
+  return exception_message_.ReleaseNonDefaultNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+inline void Response::set_allocated_exception_message(std::string* exception_message) {
+  if (exception_message != nullptr) {
+    _has_bits_[0] |= 0x00000001u;
+  } else {
+    _has_bits_[0] &= ~0x00000001u;
+  }
+  exception_message_.SetAllocatedNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), exception_message);
+  // @@protoc_insertion_point(field_set_allocated:mozilla.appservices.httpconfig.protobuf.Response.exception_message)
+}
+
+// optional string url = 2;
+inline bool Response::_internal_has_url() const {
+  bool value = (_has_bits_[0] & 0x00000002u) != 0;
+  return value;
+}
+inline bool Response::has_url() const {
+  return _internal_has_url();
+}
+inline void Response::clear_url() {
+  url_.ClearToEmptyNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  _has_bits_[0] &= ~0x00000002u;
+}
+inline const std::string& Response::url() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Response.url)
+  return _internal_url();
+}
+inline void Response::set_url(const std::string& value) {
+  _internal_set_url(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Response.url)
+}
+inline std::string* Response::mutable_url() {
+  // @@protoc_insertion_point(field_mutable:mozilla.appservices.httpconfig.protobuf.Response.url)
+  return _internal_mutable_url();
+}
+inline const std::string& Response::_internal_url() const {
+  return url_.GetNoArena();
+}
+inline void Response::_internal_set_url(const std::string& value) {
+  _has_bits_[0] |= 0x00000002u;
+  url_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), value);
+}
+inline void Response::set_url(std::string&& value) {
+  _has_bits_[0] |= 0x00000002u;
+  url_.SetNoArena(
+    &::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), ::std::move(value));
+  // @@protoc_insertion_point(field_set_rvalue:mozilla.appservices.httpconfig.protobuf.Response.url)
+}
+inline void Response::set_url(const char* value) {
+  GOOGLE_DCHECK(value != nullptr);
+  _has_bits_[0] |= 0x00000002u;
+  url_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
+  // @@protoc_insertion_point(field_set_char:mozilla.appservices.httpconfig.protobuf.Response.url)
+}
+inline void Response::set_url(const char* value, size_t size) {
+  _has_bits_[0] |= 0x00000002u;
+  url_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(),
+      ::std::string(reinterpret_cast<const char*>(value), size));
+  // @@protoc_insertion_point(field_set_pointer:mozilla.appservices.httpconfig.protobuf.Response.url)
+}
+inline std::string* Response::_internal_mutable_url() {
+  _has_bits_[0] |= 0x00000002u;
+  return url_.MutableNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+inline std::string* Response::release_url() {
+  // @@protoc_insertion_point(field_release:mozilla.appservices.httpconfig.protobuf.Response.url)
+  if (!_internal_has_url()) {
+    return nullptr;
+  }
+  _has_bits_[0] &= ~0x00000002u;
+  return url_.ReleaseNonDefaultNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+inline void Response::set_allocated_url(std::string* url) {
+  if (url != nullptr) {
+    _has_bits_[0] |= 0x00000002u;
+  } else {
+    _has_bits_[0] &= ~0x00000002u;
+  }
+  url_.SetAllocatedNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), url);
+  // @@protoc_insertion_point(field_set_allocated:mozilla.appservices.httpconfig.protobuf.Response.url)
+}
+
+// optional int32 status = 3;
+inline bool Response::_internal_has_status() const {
+  bool value = (_has_bits_[0] & 0x00000008u) != 0;
+  return value;
+}
+inline bool Response::has_status() const {
+  return _internal_has_status();
+}
+inline void Response::clear_status() {
+  status_ = 0;
+  _has_bits_[0] &= ~0x00000008u;
+}
+inline ::PROTOBUF_NAMESPACE_ID::int32 Response::_internal_status() const {
+  return status_;
+}
+inline ::PROTOBUF_NAMESPACE_ID::int32 Response::status() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Response.status)
+  return _internal_status();
+}
+inline void Response::_internal_set_status(::PROTOBUF_NAMESPACE_ID::int32 value) {
+  _has_bits_[0] |= 0x00000008u;
+  status_ = value;
+}
+inline void Response::set_status(::PROTOBUF_NAMESPACE_ID::int32 value) {
+  _internal_set_status(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Response.status)
+}
+
+// optional bytes body = 4;
+inline bool Response::_internal_has_body() const {
+  bool value = (_has_bits_[0] & 0x00000004u) != 0;
+  return value;
+}
+inline bool Response::has_body() const {
+  return _internal_has_body();
+}
+inline void Response::clear_body() {
+  body_.ClearToEmptyNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+  _has_bits_[0] &= ~0x00000004u;
+}
+inline const std::string& Response::body() const {
+  // @@protoc_insertion_point(field_get:mozilla.appservices.httpconfig.protobuf.Response.body)
+  return _internal_body();
+}
+inline void Response::set_body(const std::string& value) {
+  _internal_set_body(value);
+  // @@protoc_insertion_point(field_set:mozilla.appservices.httpconfig.protobuf.Response.body)
+}
+inline std::string* Response::mutable_body() {
+  // @@protoc_insertion_point(field_mutable:mozilla.appservices.httpconfig.protobuf.Response.body)
+  return _internal_mutable_body();
+}
+inline const std::string& Response::_internal_body() const {
+  return body_.GetNoArena();
+}
+inline void Response::_internal_set_body(const std::string& value) {
+  _has_bits_[0] |= 0x00000004u;
+  body_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), value);
+}
+inline void Response::set_body(std::string&& value) {
+  _has_bits_[0] |= 0x00000004u;
+  body_.SetNoArena(
+    &::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), ::std::move(value));
+  // @@protoc_insertion_point(field_set_rvalue:mozilla.appservices.httpconfig.protobuf.Response.body)
+}
+inline void Response::set_body(const char* value) {
+  GOOGLE_DCHECK(value != nullptr);
+  _has_bits_[0] |= 0x00000004u;
+  body_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), ::std::string(value));
+  // @@protoc_insertion_point(field_set_char:mozilla.appservices.httpconfig.protobuf.Response.body)
+}
+inline void Response::set_body(const void* value, size_t size) {
+  _has_bits_[0] |= 0x00000004u;
+  body_.SetNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(),
+      ::std::string(reinterpret_cast<const char*>(value), size));
+  // @@protoc_insertion_point(field_set_pointer:mozilla.appservices.httpconfig.protobuf.Response.body)
+}
+inline std::string* Response::_internal_mutable_body() {
+  _has_bits_[0] |= 0x00000004u;
+  return body_.MutableNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+inline std::string* Response::release_body() {
+  // @@protoc_insertion_point(field_release:mozilla.appservices.httpconfig.protobuf.Response.body)
+  if (!_internal_has_body()) {
+    return nullptr;
+  }
+  _has_bits_[0] &= ~0x00000004u;
+  return body_.ReleaseNonDefaultNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited());
+}
+inline void Response::set_allocated_body(std::string* body) {
+  if (body != nullptr) {
+    _has_bits_[0] |= 0x00000004u;
+  } else {
+    _has_bits_[0] &= ~0x00000004u;
+  }
+  body_.SetAllocatedNoArena(&::PROTOBUF_NAMESPACE_ID::internal::GetEmptyStringAlreadyInited(), body);
+  // @@protoc_insertion_point(field_set_allocated:mozilla.appservices.httpconfig.protobuf.Response.body)
+}
+
+// map<string, string> headers = 5;
+inline int Response::_internal_headers_size() const {
+  return headers_.size();
+}
+inline int Response::headers_size() const {
+  return _internal_headers_size();
+}
+inline void Response::clear_headers() {
+  headers_.Clear();
+}
+inline const ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >&
+Response::_internal_headers() const {
+  return headers_.GetMap();
+}
+inline const ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >&
+Response::headers() const {
+  // @@protoc_insertion_point(field_map:mozilla.appservices.httpconfig.protobuf.Response.headers)
+  return _internal_headers();
+}
+inline ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >*
+Response::_internal_mutable_headers() {
+  return headers_.MutableMap();
+}
+inline ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >*
+Response::mutable_headers() {
+  // @@protoc_insertion_point(field_mutable_map:mozilla.appservices.httpconfig.protobuf.Response.headers)
+  return _internal_mutable_headers();
+}
+
+#ifdef __GNUC__
+  #pragma GCC diagnostic pop
+#endif  // __GNUC__
+// -------------------------------------------------------------------
+
+// -------------------------------------------------------------------
+
+// -------------------------------------------------------------------
+
+
+// @@protoc_insertion_point(namespace_scope)
+
+}  // namespace protobuf
+}  // namespace httpconfig
+}  // namespace appservices
+}  // namespace mozilla
+
+PROTOBUF_NAMESPACE_OPEN
+
+template <> struct is_proto_enum< ::mozilla::appservices::httpconfig::protobuf::Request_Method> : ::std::true_type {};
+
+PROTOBUF_NAMESPACE_CLOSE
+
+// @@protoc_insertion_point(global_scope)
+
+#include <google/protobuf/port_undef.inc>
+#endif  // GOOGLE_PROTOBUF_INCLUDED_GOOGLE_PROTOBUF_INCLUDED_fetch_5fmsg_5ftypes_2eproto
diff --git a/toolkit/components/viaduct/fetch_msg_types.proto b/toolkit/components/viaduct/fetch_msg_types.proto
new file mode 100644
index 0000000000..7ca651267a
--- /dev/null
+++ b/toolkit/components/viaduct/fetch_msg_types.proto
@@ -0,0 +1,41 @@
+syntax = "proto2";
+
+// Note: this file name must be unique due to how the iOS megazord works :(
+
+package mozilla.appservices.httpconfig.protobuf;
+
+option java_package = "mozilla.appservices.httpconfig";
+option java_outer_classname = "MsgTypes";
+option swift_prefix = "MsgTypes_";
+option optimize_for = LITE_RUNTIME;
+
+message Request {
+    enum Method {
+        GET = 0;
+        HEAD = 1;
+        POST = 2;
+        PUT = 3;
+        DELETE = 4;
+        CONNECT = 5;
+        OPTIONS = 6;
+        TRACE = 7;
+    }
+    required Method method = 1;
+    required string url = 2;
+    optional bytes body = 3;
+    map<string, string> headers = 4;
+    required bool follow_redirects = 5;
+    required bool use_caches = 6;
+    required int32 connect_timeout_secs = 7;
+    required int32 read_timeout_secs = 8;
+}
+
+message Response {
+    // If this is present, nothing else is.
+    optional string exception_message = 1;
+    optional string url = 2;
+    optional int32 status = 3;
+    optional bytes body = 4;
+    map<string, string> headers = 5;
+}
+
diff --git a/toolkit/components/viaduct/moz.build b/toolkit/components/viaduct/moz.build
new file mode 100644
index 0000000000..2394d7e69f
--- /dev/null
+++ b/toolkit/components/viaduct/moz.build
@@ -0,0 +1,32 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+XPIDL_MODULE = "viaduct"
+
+XPIDL_SOURCES += [
+    "mozIViaduct.idl",
+]
+
+XPCOM_MANIFESTS += [
+    "components.conf",
+]
+
+UNIFIED_SOURCES += [
+    "fetch_msg_types.pb.cc",
+    "Viaduct.cpp",
+    "ViaductRequest.cpp",
+]
+
+EXPORTS.mozilla += [
+    "fetch_msg_types.pb.h",
+    "Viaduct.h",
+    "ViaductRequest.h",
+]
+
+include("/ipc/chromium/chromium-config.mozbuild")
+
+DEFINES["GOOGLE_PROTOBUF_NO_RTTI"] = True
+DEFINES["GOOGLE_PROTOBUF_NO_STATIC_INITIALIZER"] = True
+
+FINAL_LIBRARY = "xul"
diff --git a/toolkit/components/viaduct/mozIViaduct.idl b/toolkit/components/viaduct/mozIViaduct.idl
new file mode 100644
index 0000000000..fe6f6b3e80
--- /dev/null
+++ b/toolkit/components/viaduct/mozIViaduct.idl
@@ -0,0 +1,11 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+[uuid(f8f11a45-ff04-4d8b-80e0-9ce14824538e), scriptable, builtinclass]
+interface mozIViaduct: nsISupports
+{
+  void EnsureInitialized();
+};