1 files changed, 135 insertions, 0 deletions
diff --git a/netwerk/protocol/http/CacheControlParser.cpp b/netwerk/protocol/http/CacheControlParser.cpp
new file mode 100644
index 0000000000..00d5b42d4f
--- /dev/null
+++ b/netwerk/protocol/http/CacheControlParser.cpp
@@ -0,0 +1,135 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et tw=80 : */
+/* 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 "CacheControlParser.h"
+
+namespace mozilla {
+namespace net {
+
+CacheControlParser::CacheControlParser(nsACString const& aHeader)
+    : Tokenizer(aHeader, nullptr, "-_"),
+      mMaxAgeSet(false),
+      mMaxAge(0),
+      mMaxStaleSet(false),
+      mMaxStale(0),
+      mMinFreshSet(false),
+      mMinFresh(0),
+      mStaleWhileRevalidateSet(false),
+      mStaleWhileRevalidate(0),
+      mNoCache(false),
+      mNoStore(false),
+      mPublic(false),
+      mPrivate(false),
+      mImmutable(false) {
+  SkipWhites();
+  if (!CheckEOF()) {
+    Directive();
+  }
+}
+
+void CacheControlParser::Directive() {
+  if (CheckWord("no-cache")) {
+    mNoCache = true;
+    IgnoreDirective();  // ignore any optionally added values
+  } else if (CheckWord("no-store")) {
+    mNoStore = true;
+  } else if (CheckWord("max-age")) {
+    mMaxAgeSet = SecondsValue(&mMaxAge);
+  } else if (CheckWord("max-stale")) {
+    mMaxStaleSet = SecondsValue(&mMaxStale, PR_UINT32_MAX);
+  } else if (CheckWord("min-fresh")) {
+    mMinFreshSet = SecondsValue(&mMinFresh);
+  } else if (CheckWord("stale-while-revalidate")) {
+    mStaleWhileRevalidateSet = SecondsValue(&mStaleWhileRevalidate);
+  } else if (CheckWord("public")) {
+    mPublic = true;
+  } else if (CheckWord("private")) {
+    mPrivate = true;
+  } else if (CheckWord("immutable")) {
+    mImmutable = true;
+  } else {
+    IgnoreDirective();
+  }
+
+  SkipWhites();
+  if (CheckEOF()) {
+    return;
+  }
+  if (CheckChar(',')) {
+    SkipWhites();
+    Directive();
+    return;
+  }
+
+  NS_WARNING("Unexpected input in Cache-control header value");
+}
+
+bool CacheControlParser::SecondsValue(uint32_t* seconds, uint32_t defaultVal) {
+  SkipWhites();
+  if (!CheckChar('=')) {
+    *seconds = defaultVal;
+    return !!defaultVal;
+  }
+
+  SkipWhites();
+  if (!ReadInteger(seconds)) {
+    NS_WARNING("Unexpected value in Cache-control header value");
+    return false;
+  }
+
+  return true;
+}
+
+void CacheControlParser::IgnoreDirective() {
+  Token t;
+  while (Next(t)) {
+    if (t.Equals(Token::Char(',')) || t.Equals(Token::EndOfFile())) {
+      Rollback();
+      break;
+    }
+    if (t.Equals(Token::Char('"'))) {
+      SkipUntil(Token::Char('"'));
+      if (!CheckChar('"')) {
+        NS_WARNING(
+            "Missing quoted string expansion in Cache-control header value");
+        break;
+      }
+    }
+  }
+}
+
+bool CacheControlParser::MaxAge(uint32_t* seconds) {
+  *seconds = mMaxAge;
+  return mMaxAgeSet;
+}
+
+bool CacheControlParser::MaxStale(uint32_t* seconds) {
+  *seconds = mMaxStale;
+  return mMaxStaleSet;
+}
+
+bool CacheControlParser::MinFresh(uint32_t* seconds) {
+  *seconds = mMinFresh;
+  return mMinFreshSet;
+}
+
+bool CacheControlParser::StaleWhileRevalidate(uint32_t* seconds) {
+  *seconds = mStaleWhileRevalidate;
+  return mStaleWhileRevalidateSet;
+}
+
+bool CacheControlParser::NoCache() { return mNoCache; }
+
+bool CacheControlParser::NoStore() { return mNoStore; }
+
+bool CacheControlParser::Public() { return mPublic; }
+
+bool CacheControlParser::Private() { return mPrivate; }
+
+bool CacheControlParser::Immutable() { return mImmutable; }
+
+}  // namespace net
+}  // namespace mozilla