1 files changed, 398 insertions, 0 deletions
diff --git a/src/shrpx_mruby_module_response.cc b/src/shrpx_mruby_module_response.cc
new file mode 100644
index 0000000..1de1d5f
--- /dev/null
+++ b/src/shrpx_mruby_module_response.cc
@@ -0,0 +1,398 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2015 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "shrpx_mruby_module_response.h"
+
+#include <mruby/variable.h>
+#include <mruby/string.h>
+#include <mruby/hash.h>
+#include <mruby/array.h>
+
+#include "shrpx_downstream.h"
+#include "shrpx_upstream.h"
+#include "shrpx_client_handler.h"
+#include "shrpx_mruby.h"
+#include "shrpx_mruby_module.h"
+#include "shrpx_log.h"
+#include "util.h"
+#include "http2.h"
+
+namespace shrpx {
+
+namespace mruby {
+
+namespace {
+mrb_value response_init(mrb_state *mrb, mrb_value self) { return self; }
+} // namespace
+
+namespace {
+mrb_value response_get_http_version_major(mrb_state *mrb, mrb_value self) {
+  auto data = static_cast<MRubyAssocData *>(mrb->ud);
+  auto downstream = data->downstream;
+  const auto &resp = downstream->response();
+  return mrb_fixnum_value(resp.http_major);
+}
+} // namespace
+
+namespace {
+mrb_value response_get_http_version_minor(mrb_state *mrb, mrb_value self) {
+  auto data = static_cast<MRubyAssocData *>(mrb->ud);
+  auto downstream = data->downstream;
+  const auto &resp = downstream->response();
+  return mrb_fixnum_value(resp.http_minor);
+}
+} // namespace
+
+namespace {
+mrb_value response_get_status(mrb_state *mrb, mrb_value self) {
+  auto data = static_cast<MRubyAssocData *>(mrb->ud);
+  auto downstream = data->downstream;
+  const auto &resp = downstream->response();
+  return mrb_fixnum_value(resp.http_status);
+}
+} // namespace
+
+namespace {
+mrb_value response_set_status(mrb_state *mrb, mrb_value self) {
+  auto data = static_cast<MRubyAssocData *>(mrb->ud);
+  auto downstream = data->downstream;
+  auto &resp = downstream->response();
+
+  mrb_int status;
+  mrb_get_args(mrb, "i", &status);
+  // We don't support 1xx status code for mruby scripting yet.
+  if (status < 200 || status > 999) {
+    mrb_raise(mrb, E_RUNTIME_ERROR,
+              "invalid status; it should be [200, 999], inclusive");
+  }
+
+  resp.http_status = status;
+
+  return self;
+}
+} // namespace
+
+namespace {
+mrb_value response_get_headers(mrb_state *mrb, mrb_value self) {
+  auto data = static_cast<MRubyAssocData *>(mrb->ud);
+  auto downstream = data->downstream;
+  const auto &resp = downstream->response();
+
+  return create_headers_hash(mrb, resp.fs.headers());
+}
+} // namespace
+
+namespace {
+mrb_value response_mod_header(mrb_state *mrb, mrb_value self, bool repl) {
+  auto data = static_cast<MRubyAssocData *>(mrb->ud);
+  auto downstream = data->downstream;
+  auto &resp = downstream->response();
+  auto &balloc = downstream->get_block_allocator();
+
+  mrb_value key, values;
+  mrb_get_args(mrb, "So", &key, &values);
+
+  if (RSTRING_LEN(key) == 0) {
+    mrb_raise(mrb, E_RUNTIME_ERROR, "empty key is not allowed");
+  }
+
+  auto ai = mrb_gc_arena_save(mrb);
+
+  key = mrb_funcall(mrb, key, "downcase", 0);
+
+  auto keyref =
+      make_string_ref(balloc, StringRef{RSTRING_PTR(key),
+                                        static_cast<size_t>(RSTRING_LEN(key))});
+
+  mrb_gc_arena_restore(mrb, ai);
+
+  auto token = http2::lookup_token(keyref.byte(), keyref.size());
+
+  if (repl) {
+    size_t p = 0;
+    auto &headers = resp.fs.headers();
+    for (size_t i = 0; i < headers.size(); ++i) {
+      auto &kv = headers[i];
+      if (kv.name == keyref) {
+        continue;
+      }
+      if (i != p) {
+        headers[p] = std::move(kv);
+      }
+      ++p;
+    }
+    headers.resize(p);
+  }
+
+  if (mrb_array_p(values)) {
+    auto n = RARRAY_LEN(values);
+    for (int i = 0; i < n; ++i) {
+      auto value = mrb_ary_ref(mrb, values, i);
+      if (!mrb_string_p(value)) {
+        mrb_raise(mrb, E_RUNTIME_ERROR, "value must be string");
+      }
+
+      resp.fs.add_header_token(
+          keyref,
+          make_string_ref(balloc,
+                          StringRef{RSTRING_PTR(value),
+                                    static_cast<size_t>(RSTRING_LEN(value))}),
+          false, token);
+    }
+  } else if (mrb_string_p(values)) {
+    resp.fs.add_header_token(
+        keyref,
+        make_string_ref(balloc,
+                        StringRef{RSTRING_PTR(values),
+                                  static_cast<size_t>(RSTRING_LEN(values))}),
+        false, token);
+  } else {
+    mrb_raise(mrb, E_RUNTIME_ERROR, "value must be string");
+  }
+
+  return mrb_nil_value();
+}
+} // namespace
+
+namespace {
+mrb_value response_set_header(mrb_state *mrb, mrb_value self) {
+  return response_mod_header(mrb, self, true);
+}
+} // namespace
+
+namespace {
+mrb_value response_add_header(mrb_state *mrb, mrb_value self) {
+  return response_mod_header(mrb, self, false);
+}
+} // namespace
+
+namespace {
+mrb_value response_clear_headers(mrb_state *mrb, mrb_value self) {
+  auto data = static_cast<MRubyAssocData *>(mrb->ud);
+  auto downstream = data->downstream;
+  auto &resp = downstream->response();
+
+  resp.fs.clear_headers();
+
+  return mrb_nil_value();
+}
+} // namespace
+
+namespace {
+mrb_value response_return(mrb_state *mrb, mrb_value self) {
+  auto data = static_cast<MRubyAssocData *>(mrb->ud);
+  auto downstream = data->downstream;
+  auto &req = downstream->request();
+  auto &resp = downstream->response();
+  int rv;
+
+  auto &balloc = downstream->get_block_allocator();
+
+  if (downstream->get_response_state() == DownstreamState::MSG_COMPLETE) {
+    mrb_raise(mrb, E_RUNTIME_ERROR, "response has already been committed");
+  }
+
+  const char *val;
+  mrb_int vallen;
+  mrb_get_args(mrb, "|s", &val, &vallen);
+
+  const uint8_t *body = nullptr;
+  size_t bodylen = 0;
+
+  if (resp.http_status == 0) {
+    resp.http_status = 200;
+  }
+
+  if (downstream->expect_response_body() && vallen > 0) {
+    body = reinterpret_cast<const uint8_t *>(val);
+    bodylen = vallen;
+  }
+
+  auto cl = resp.fs.header(http2::HD_CONTENT_LENGTH);
+
+  if (resp.http_status == 204 ||
+      (resp.http_status == 200 && req.method == HTTP_CONNECT)) {
+    if (cl) {
+      // Delete content-length here
+      http2::erase_header(cl);
+    }
+
+    resp.fs.content_length = -1;
+  } else {
+    auto content_length = util::make_string_ref_uint(balloc, vallen);
+
+    if (cl) {
+      cl->value = content_length;
+    } else {
+      resp.fs.add_header_token(StringRef::from_lit("content-length"),
+                               content_length, false, http2::HD_CONTENT_LENGTH);
+    }
+
+    resp.fs.content_length = vallen;
+  }
+
+  auto date = resp.fs.header(http2::HD_DATE);
+  if (!date) {
+    auto lgconf = log_config();
+    lgconf->update_tstamp(std::chrono::system_clock::now());
+    resp.fs.add_header_token(StringRef::from_lit("date"),
+                             make_string_ref(balloc, lgconf->tstamp->time_http),
+                             false, http2::HD_DATE);
+  }
+
+  auto upstream = downstream->get_upstream();
+
+  rv = upstream->send_reply(downstream, body, bodylen);
+  if (rv != 0) {
+    mrb_raise(mrb, E_RUNTIME_ERROR, "could not send response");
+  }
+
+  auto handler = upstream->get_client_handler();
+
+  handler->signal_write();
+
+  return self;
+}
+} // namespace
+
+namespace {
+mrb_value response_send_info(mrb_state *mrb, mrb_value self) {
+  auto data = static_cast<MRubyAssocData *>(mrb->ud);
+  auto downstream = data->downstream;
+  auto &resp = downstream->response();
+  int rv;
+
+  if (downstream->get_response_state() == DownstreamState::MSG_COMPLETE) {
+    mrb_raise(mrb, E_RUNTIME_ERROR, "response has already been committed");
+  }
+
+  mrb_int http_status;
+  mrb_value hash;
+  mrb_get_args(mrb, "iH", &http_status, &hash);
+
+  if (http_status / 100 != 1) {
+    mrb_raise(mrb, E_RUNTIME_ERROR,
+              "status_code must be in range [100, 199], inclusive");
+  }
+
+  auto &balloc = downstream->get_block_allocator();
+
+  auto keys = mrb_hash_keys(mrb, hash);
+  auto keyslen = RARRAY_LEN(keys);
+
+  for (int i = 0; i < keyslen; ++i) {
+    auto key = mrb_ary_ref(mrb, keys, i);
+    if (!mrb_string_p(key)) {
+      mrb_raise(mrb, E_RUNTIME_ERROR, "key must be string");
+    }
+
+    auto values = mrb_hash_get(mrb, hash, key);
+
+    auto ai = mrb_gc_arena_save(mrb);
+
+    key = mrb_funcall(mrb, key, "downcase", 0);
+
+    auto keyref = make_string_ref(
+        balloc,
+        StringRef{RSTRING_PTR(key), static_cast<size_t>(RSTRING_LEN(key))});
+
+    mrb_gc_arena_restore(mrb, ai);
+
+    auto token = http2::lookup_token(keyref.byte(), keyref.size());
+
+    if (mrb_array_p(values)) {
+      auto n = RARRAY_LEN(values);
+      for (int i = 0; i < n; ++i) {
+        auto value = mrb_ary_ref(mrb, values, i);
+        if (!mrb_string_p(value)) {
+          mrb_raise(mrb, E_RUNTIME_ERROR, "value must be string");
+        }
+
+        resp.fs.add_header_token(
+            keyref,
+            make_string_ref(balloc,
+                            StringRef{RSTRING_PTR(value),
+                                      static_cast<size_t>(RSTRING_LEN(value))}),
+            false, token);
+      }
+    } else if (mrb_string_p(values)) {
+      resp.fs.add_header_token(
+          keyref,
+          make_string_ref(balloc,
+                          StringRef{RSTRING_PTR(values),
+                                    static_cast<size_t>(RSTRING_LEN(values))}),
+          false, token);
+    } else {
+      mrb_raise(mrb, E_RUNTIME_ERROR, "value must be string");
+    }
+  }
+
+  resp.http_status = http_status;
+
+  auto upstream = downstream->get_upstream();
+
+  rv = upstream->on_downstream_header_complete(downstream);
+  if (rv != 0) {
+    mrb_raise(mrb, E_RUNTIME_ERROR, "could not send non-final response");
+  }
+
+  auto handler = upstream->get_client_handler();
+
+  handler->signal_write();
+
+  return self;
+}
+} // namespace
+
+void init_response_class(mrb_state *mrb, RClass *module) {
+  auto response_class =
+      mrb_define_class_under(mrb, module, "Response", mrb->object_class);
+
+  mrb_define_method(mrb, response_class, "initialize", response_init,
+                    MRB_ARGS_NONE());
+  mrb_define_method(mrb, response_class, "http_version_major",
+                    response_get_http_version_major, MRB_ARGS_NONE());
+  mrb_define_method(mrb, response_class, "http_version_minor",
+                    response_get_http_version_minor, MRB_ARGS_NONE());
+  mrb_define_method(mrb, response_class, "status", response_get_status,
+                    MRB_ARGS_NONE());
+  mrb_define_method(mrb, response_class, "status=", response_set_status,
+                    MRB_ARGS_REQ(1));
+  mrb_define_method(mrb, response_class, "headers", response_get_headers,
+                    MRB_ARGS_NONE());
+  mrb_define_method(mrb, response_class, "add_header", response_add_header,
+                    MRB_ARGS_REQ(2));
+  mrb_define_method(mrb, response_class, "set_header", response_set_header,
+                    MRB_ARGS_REQ(2));
+  mrb_define_method(mrb, response_class, "clear_headers",
+                    response_clear_headers, MRB_ARGS_NONE());
+  mrb_define_method(mrb, response_class, "return", response_return,
+                    MRB_ARGS_OPT(1));
+  mrb_define_method(mrb, response_class, "send_info", response_send_info,
+                    MRB_ARGS_REQ(2));
+}
+
+} // namespace mruby
+
+} // namespace shrpx