Implement URLRequestBackoffManager for managing Backoff headers

net/url_request/url_request_http_job_unittest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/url_request/url_request_http_job.h"
 
 #include <cstddef>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
@@ skipping 75 matching lines @@
   void EnableSdch() {
     context_.SetSdchManager(scoped_ptr<SdchManager>(new SdchManager).Pass());
   }
 
   MockNetworkLayer network_layer_;
   TestURLRequestContext context_;
   TestDelegate delegate_;
   scoped_ptr<URLRequest> req_;
 };
 
+class URLRequestHttpJobBackoffTest : public ::testing::Test {
+ protected:
+  URLRequestHttpJobBackoffTest() : context_(new TestURLRequestContext(true)) {
+    context_->set_client_socket_factory(&socket_factory_);
+    context_->set_network_delegate(&network_delegate_);
+    context_->set_backoff_manager(&manager_);
+    context_->Init();
+  }
+
+  MockClientSocketFactory socket_factory_;
+  TestNetworkDelegate network_delegate_;
+  URLRequestBackoffManager manager_;
+  scoped_ptr<TestURLRequestContext> context_;
+};
+
+TEST_F(URLRequestHttpJobBackoffTest, BackoffHeader) {
+  MockWrite writes[] = {MockWrite(
+      "GET / HTTP/1.1\r\n"
+      "Host: www.example.com\r\n"
+      "Connection: keep-alive\r\n"
+      "User-Agent:\r\n"
+      "Accept-Encoding: gzip, deflate\r\n"
+      "Accept-Language: en-us,fr\r\n\r\n")};
+  MockRead reads[] = {MockRead(
+                          "HTTP/1.1 200 OK\r\n"
+                          "Backoff: 3600\r\n"
+                          "Content-Length: 9\r\n\r\n"),
+                      MockRead("test.html")};
+
+  StaticSocketDataProvider socket_data(reads, arraysize(reads), writes,
+                                       arraysize(writes));
+  socket_factory_.AddSocketDataProvider(&socket_data);
+
+  TestDelegate delegate1;
+  scoped_ptr<URLRequest> request1 =
+      context_->CreateRequest(GURL("http://www.example.com"), DEFAULT_PRIORITY,
+                              &delegate1).Pass();
+
+  request1->Start();
+  ASSERT_TRUE(request1->is_pending());
+  base::RunLoop().Run();
+
+  EXPECT_TRUE(request1->status().is_success());
+  EXPECT_EQ("test.html", delegate1.data_received());
+  EXPECT_EQ(1, delegate1.received_before_network_start_count());
+
+  // Issue another request, and backoff logic should apply.
+  TestDelegate delegate2;
+  scoped_ptr<URLRequest> request2 =
+      context_->CreateRequest(GURL("http://www.example.com"), DEFAULT_PRIORITY,
+                              &delegate2).Pass();
+
+  request2->Start();
+  ASSERT_TRUE(request2->is_pending());
+  base::RunLoop().Run();
+
+  EXPECT_FALSE(request2->status().is_success());
+  EXPECT_EQ(ERR_TEMPORARY_BACKOFF, request2->status().error());
+  EXPECT_EQ(0, delegate2.received_before_network_start_count());
+}
+
+TEST_F(URLRequestHttpJobBackoffTest, BackoffHeaderCachedResponse) {
+  MockWrite writes[] = {MockWrite(
+      "GET / HTTP/1.1\r\n"
+      "Host: www.example.com\r\n"
+      "Connection: keep-alive\r\n"
+      "User-Agent:\r\n"
+      "Accept-Encoding: gzip, deflate\r\n"
+      "Accept-Language: en-us,fr\r\n\r\n")};
+  MockRead reads[] = {MockRead(
+                          "HTTP/1.1 200 OK\r\n"
+                          "Backoff: 3600\r\n"
+                          "Cache-Control: max-age=120\r\n"
+                          "Content-Length: 9\r\n\r\n"),
+                      MockRead("test.html")};
+
+  StaticSocketDataProvider socket_data(reads, arraysize(reads), writes,
+                                       arraysize(writes));
+  socket_factory_.AddSocketDataProvider(&socket_data);
+
+  TestDelegate delegate1;
+  scoped_ptr<URLRequest> request1 =
+      context_->CreateRequest(GURL("http://www.example.com"), DEFAULT_PRIORITY,
+                              &delegate1).Pass();
+
+  request1->Start();
+  ASSERT_TRUE(request1->is_pending());
+  base::RunLoop().Run();
+
+  EXPECT_TRUE(request1->status().is_success());
+  EXPECT_EQ("test.html", delegate1.data_received());
+  EXPECT_EQ(1, delegate1.received_before_network_start_count());
+
+  // Backoff logic does not apply to a second request, since it is fetched
+  // from cache.
+  TestDelegate delegate2;
+  scoped_ptr<URLRequest> request2 =
+      context_->CreateRequest(GURL("http://www.example.com"), DEFAULT_PRIORITY,
+                              &delegate2).Pass();
+
+  request2->Start();
+  ASSERT_TRUE(request2->is_pending());
+  base::RunLoop().Run();
+  EXPECT_TRUE(request2->was_cached());
+  EXPECT_TRUE(request2->status().is_success());
+  EXPECT_EQ(0, delegate2.received_before_network_start_count());
+}
+
 // Make sure that SetPriority actually sets the URLRequestHttpJob's
 // priority, both before and after start.
 TEST_F(URLRequestHttpJobTest, SetPriorityBasic) {
   scoped_refptr<TestURLRequestHttpJob> job(
       new TestURLRequestHttpJob(req_.get()));
   EXPECT_EQ(DEFAULT_PRIORITY, job->priority());
 
   job->SetPriority(LOWEST);
   EXPECT_EQ(LOWEST, job->priority());
 
@@ skipping 237 matching lines @@
   req_->SetLoadFlags(LOAD_DISABLE_CACHE);
   job->Start();
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(URLRequestStatus::IO_PENDING, req_->status().status());
   EXPECT_TRUE(fake_handshake_stream->initialize_stream_was_called());
 }
 
 }  // namespace
 
 }  // namespace net