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/net_errors.h"
  14 #include "net/base/url_util.h"
  15 #include "net/http/http_status_code.h"
  16 #include "net/url_request/url_fetcher.h"
  17 #include "net/url_request/url_request_context_getter.h"
  18 #include "url/gurl.h"
  19
  20 namespace copresence {
  21
  22 const char HttpPost::kApiKeyField[] = "key";
  23 const char HttpPost::kTracingField[] = "trace";
  24
  25 HttpPost::HttpPost(net::URLRequestContextGetter* url_context_getter,
  26                    const std::string& server_host,
  27                    const std::string& rpc_name,
  28                    const std::string& tracing_token,
  29                    std::string api_key,
  30                    const google::protobuf::MessageLite& request_proto) {
  31   // Create the base URL to call.
  32   GURL url(server_host + "/" + rpc_name);
  33
  34   // Add the tracing token, if specified.
  35   if (!tracing_token.empty()) {
  36     url = net::AppendQueryParameter(
  37         url, kTracingField, "token:" + tracing_token);
  38   }
  39
  40   // If no API key is specified, use the Chrome API key.
  41   if (api_key.empty()) {
  42 #ifdef GOOGLE_CHROME_BUILD
  43     DCHECK(google_apis::HasKeysConfigured());
  44     api_key = google_apis::GetAPIKey();
  45 #else
  46     LOG(ERROR) << "No Copresence API key provided";
  47 #endif
  48   }
  49   url = net::AppendQueryParameter(url, kApiKeyField, api_key);
  50
  51   // Serialize the proto for transmission.
  52   std::string request_data;
  53   bool serialize_success = request_proto.SerializeToString(&request_data);
  54   DCHECK(serialize_success);
  55
  56   // Configure and send the request.
  57   url_fetcher_.reset(net::URLFetcher::Create(
  58       kUrlFetcherId, url, net::URLFetcher::POST, this));
  59   url_fetcher_->SetRequestContext(url_context_getter);
  60   url_fetcher_->SetLoadFlags(net::LOAD_BYPASS_CACHE |
  61                              net::LOAD_DISABLE_CACHE |
  62                              net::LOAD_DO_NOT_SAVE_COOKIES |
  63                              net::LOAD_DO_NOT_SEND_COOKIES |
  64                              net::LOAD_DO_NOT_SEND_AUTH_DATA);
  65   url_fetcher_->SetUploadData("application/x-protobuf", request_data);
  66 }
  67
  68 HttpPost::~HttpPost() {}
  69
  70 void HttpPost::Start(const ResponseCallback& response_callback) {
  71   response_callback_ = response_callback;
  72   DVLOG(3) << "Sending Copresence request to "
  73            << url_fetcher_->GetOriginalURL().spec();
  74   url_fetcher_->Start();
  75 }
  76
  77 void HttpPost::OnURLFetchComplete(const net::URLFetcher* source) {
  78   DCHECK_EQ(url_fetcher_.get(), source);
  79
  80   // Gather response info.
  81   std::string response;
  82   source->GetResponseAsString(&response);
  83   int response_code = source->GetResponseCode();
  84
  85   // Log any errors.
  86   if (response_code < 0) {
  87     net::URLRequestStatus status = source->GetStatus();
  88     LOG(WARNING) << "Couldn't contact the Copresence server at "
  89                  << source->GetURL() << ". Status code " << status.status();
  90     LOG_IF(WARNING, status.error())
  91         << "Network error: " << net::ErrorToString(status.error());
  92     LOG_IF(WARNING, !response.empty()) << "HTTP response: " << response;
  93   } else if (response_code != net::HTTP_OK) {
  94     LOG(WARNING) << "Copresence request got HTTP response code "
  95                  << response_code << ". Response:\n" << response;
  96   }
  97
  98   // Return the response.
  99   response_callback_.Run(response_code, response);
 100 }
 101
 102 }  // namespace copresence