src/components/copresence/rpc/http_post.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/copresence/rpc/http_post.h"
   6
   7 // TODO(ckehoe): Support third-party protobufs too.
   8 #include <google/protobuf/message_lite.h>
   9
  10 #include "base/bind.h"
  11 #include "google_apis/google_api_keys.h"
  12 #include "net/base/load_flags.h"
  13 #include "net/base/url_util.h"
  14 #include "net/http/http_status_code.h"
  15 #include "net/url_request/url_fetcher.h"
  16 #include "net/url_request/url_request_context_getter.h"
  17 #include "url/gurl.h"
  18
  19 namespace copresence {
  20
  21 const char HttpPost::kApiKeyField[] = "key";
  22 const char HttpPost::kTracingTokenField[] = "trace";
  23
  24 HttpPost::HttpPost(net::URLRequestContextGetter* url_context_getter,
  25                    const std::string& server_host,
  26                    const std::string& rpc_name,
  27                    const std::string& tracing_token,
  28                    std::string api_key,
  29                    const google::protobuf::MessageLite& request_proto) {
  30   // Create the base URL to call.
  31   GURL url(server_host + "/" + rpc_name);
  32
  33   // Add the tracing token, if specified.
  34   if (!tracing_token.empty()) {
  35     url = net::AppendQueryParameter(
  36         url, kTracingTokenField, "token:" + tracing_token);
  37   }
  38
  39   // If no API key is specified, use the Chrome API key.
  40   if (api_key.empty()) {
  41 #ifdef GOOGLE_CHROME_BUILD
  42     DCHECK(google_apis::HasKeysConfigured());
  43     api_key = google_apis::GetAPIKey();
  44 #else
  45     LOG(ERROR) << "No Copresence API key provided";
  46 #endif
  47   }
  48   url = net::AppendQueryParameter(url, kApiKeyField, api_key);
  49
  50   // Serialize the proto for transmission.
  51   std::string request_data;
  52   bool serialize_success = request_proto.SerializeToString(&request_data);
  53   DCHECK(serialize_success);
  54
  55   // Configure and send the request.
  56   url_fetcher_.reset(net::URLFetcher::Create(
  57       kUrlFetcherId, url, net::URLFetcher::POST, this));
  58   url_fetcher_->SetRequestContext(url_context_getter);
  59   url_fetcher_->SetLoadFlags(net::LOAD_BYPASS_CACHE |
  60                              net::LOAD_DISABLE_CACHE |
  61                              net::LOAD_DO_NOT_SAVE_COOKIES |
  62                              net::LOAD_DO_NOT_SEND_COOKIES |
  63                              net::LOAD_DO_NOT_SEND_AUTH_DATA);
  64   url_fetcher_->SetUploadData("application/x-protobuf", request_data);
  65 }
  66
  67 HttpPost::~HttpPost() {}
  68
  69 void HttpPost::Start(const ResponseCallback& response_callback) {
  70   response_callback_ = response_callback;
  71   url_fetcher_->Start();
  72 }
  73
  74 void HttpPost::OnURLFetchComplete(const net::URLFetcher* source) {
  75   DCHECK_EQ(url_fetcher_.get(), source);
  76
  77   // Gather response info.
  78   std::string response;
  79   source->GetResponseAsString(&response);
  80   int response_code = source->GetResponseCode();
  81
  82   // Log any errors.
  83   if (response_code < 0) {
  84     LOG(WARNING) << "Couldn't contact the Copresence server at "
  85                  << source->GetURL();
  86   } else if (response_code != net::HTTP_OK) {
  87     LOG(WARNING) << "Copresence request got HTTP response code "
  88                  << response_code << ". Response:\n" << response;
  89   }
  90
  91   // Return the response.
  92   response_callback_.Run(response_code, response);
  93 }
  94
  95 }  // namespace copresence