src/net/http/http_response_body_drainer_unittest.cc

   1 // Copyright (c) 2012 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 "net/http/http_response_body_drainer.h"
   6
   7 #include <cstring>
   8
   9 #include "base/bind.h"
  10 #include "base/compiler_specific.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "net/base/io_buffer.h"
  14 #include "net/base/net_errors.h"
  15 #include "net/base/test_completion_callback.h"
  16 #include "net/http/http_network_session.h"
  17 #include "net/http/http_server_properties_impl.h"
  18 #include "net/http/http_stream.h"
  19 #include "net/proxy/proxy_service.h"
  20 #include "net/ssl/ssl_config_service_defaults.h"
  21 #include "testing/gtest/include/gtest/gtest.h"
  22
  23 namespace net {
  24
  25 namespace {
  26
  27 const int kMagicChunkSize = 1024;
  28 COMPILE_ASSERT(
  29     (HttpResponseBodyDrainer::kDrainBodyBufferSize % kMagicChunkSize) == 0,
  30     chunk_size_needs_to_divide_evenly_into_buffer_size);
  31
  32 class CloseResultWaiter {
  33  public:
  34   CloseResultWaiter()
  35       : result_(false),
  36         have_result_(false),
  37         waiting_for_result_(false) {}
  38
  39   int WaitForResult() {
  40     CHECK(!waiting_for_result_);
  41     while (!have_result_) {
  42       waiting_for_result_ = true;
  43       base::MessageLoop::current()->Run();
  44       waiting_for_result_ = false;
  45     }
  46     return result_;
  47   }
  48
  49   void set_result(bool result) {
  50     result_ = result;
  51     have_result_ = true;
  52     if (waiting_for_result_)
  53       base::MessageLoop::current()->Quit();
  54   }
  55
  56  private:
  57   int result_;
  58   bool have_result_;
  59   bool waiting_for_result_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(CloseResultWaiter);
  62 };
  63
  64 class MockHttpStream : public HttpStream {
  65  public:
  66   MockHttpStream(CloseResultWaiter* result_waiter)
  67       : result_waiter_(result_waiter),
  68         buf_len_(0),
  69         closed_(false),
  70         stall_reads_forever_(false),
  71         num_chunks_(0),
  72         is_sync_(false),
  73         is_last_chunk_zero_size_(false),
  74         is_complete_(false),
  75         weak_factory_(this) {}
  76   virtual ~MockHttpStream() {}
  77
  78   // HttpStream implementation.
  79   virtual int InitializeStream(const HttpRequestInfo* request_info,
  80                                RequestPriority priority,
  81                                const BoundNetLog& net_log,
  82                                const CompletionCallback& callback) OVERRIDE {
  83     return ERR_UNEXPECTED;
  84   }
  85   virtual int SendRequest(const HttpRequestHeaders& request_headers,
  86                           HttpResponseInfo* response,
  87                           const CompletionCallback& callback) OVERRIDE {
  88     return ERR_UNEXPECTED;
  89   }
  90   virtual UploadProgress GetUploadProgress() const OVERRIDE {
  91     return UploadProgress();
  92   }
  93   virtual int ReadResponseHeaders(const CompletionCallback& callback) OVERRIDE {
  94     return ERR_UNEXPECTED;
  95   }
  96
  97   virtual bool CanFindEndOfResponse() const OVERRIDE { return true; }
  98   virtual bool IsConnectionReused() const OVERRIDE { return false; }
  99   virtual void SetConnectionReused() OVERRIDE {}
 100   virtual bool IsConnectionReusable() const OVERRIDE { return false; }
 101   virtual int64 GetTotalReceivedBytes() const OVERRIDE { return 0; }
 102   virtual void GetSSLInfo(SSLInfo* ssl_info) OVERRIDE {}
 103   virtual void GetSSLCertRequestInfo(
 104       SSLCertRequestInfo* cert_request_info) OVERRIDE {}
 105
 106   // Mocked API
 107   virtual int ReadResponseBody(IOBuffer* buf, int buf_len,
 108                                const CompletionCallback& callback) OVERRIDE;
 109   virtual void Close(bool not_reusable) OVERRIDE {
 110     CHECK(!closed_);
 111     closed_ = true;
 112     result_waiter_->set_result(not_reusable);
 113   }
 114
 115   virtual HttpStream* RenewStreamForAuth() OVERRIDE {
 116     return NULL;
 117   }
 118
 119   virtual bool IsResponseBodyComplete() const OVERRIDE { return is_complete_; }
 120
 121   virtual bool IsSpdyHttpStream() const OVERRIDE { return false; }
 122
 123   virtual bool GetLoadTimingInfo(
 124       LoadTimingInfo* load_timing_info) const OVERRIDE { return false; }
 125
 126   virtual void Drain(HttpNetworkSession*) OVERRIDE {}
 127
 128   virtual void SetPriority(RequestPriority priority) OVERRIDE {}
 129
 130   // Methods to tweak/observer mock behavior:
 131   void set_stall_reads_forever() { stall_reads_forever_ = true; }
 132
 133   void set_num_chunks(int num_chunks) { num_chunks_ = num_chunks; }
 134
 135   void set_sync() { is_sync_ = true; }
 136
 137   void set_is_last_chunk_zero_size() { is_last_chunk_zero_size_ = true; }
 138
 139  private:
 140   int ReadResponseBodyImpl(IOBuffer* buf, int buf_len);
 141   void CompleteRead();
 142
 143   bool closed() const { return closed_; }
 144
 145   CloseResultWaiter* const result_waiter_;
 146   scoped_refptr<IOBuffer> user_buf_;
 147   CompletionCallback callback_;
 148   int buf_len_;
 149   bool closed_;
 150   bool stall_reads_forever_;
 151   int num_chunks_;
 152   bool is_sync_;
 153   bool is_last_chunk_zero_size_;
 154   bool is_complete_;
 155   base::WeakPtrFactory<MockHttpStream> weak_factory_;
 156 };
 157
 158 int MockHttpStream::ReadResponseBody(IOBuffer* buf,
 159                                      int buf_len,
 160                                      const CompletionCallback& callback) {
 161   CHECK(!callback.is_null());
 162   CHECK(callback_.is_null());
 163   CHECK(buf);
 164
 165   if (stall_reads_forever_)
 166     return ERR_IO_PENDING;
 167
 168   if (is_complete_)
 169     return ERR_UNEXPECTED;
 170
 171   if (!is_sync_) {
 172     user_buf_ = buf;
 173     buf_len_ = buf_len;
 174     callback_ = callback;
 175     base::MessageLoop::current()->PostTask(
 176         FROM_HERE,
 177         base::Bind(&MockHttpStream::CompleteRead, weak_factory_.GetWeakPtr()));
 178     return ERR_IO_PENDING;
 179   } else {
 180     return ReadResponseBodyImpl(buf, buf_len);
 181   }
 182 }
 183
 184 int MockHttpStream::ReadResponseBodyImpl(IOBuffer* buf, int buf_len) {
 185   if (is_last_chunk_zero_size_ && num_chunks_ == 1) {
 186     buf_len = 0;
 187   } else {
 188     if (buf_len > kMagicChunkSize)
 189       buf_len = kMagicChunkSize;
 190     std::memset(buf->data(), 1, buf_len);
 191   }
 192   num_chunks_--;
 193   if (!num_chunks_)
 194     is_complete_ = true;
 195
 196   return buf_len;
 197 }
 198
 199 void MockHttpStream::CompleteRead() {
 200   int result = ReadResponseBodyImpl(user_buf_.get(), buf_len_);
 201   user_buf_ = NULL;
 202   CompletionCallback callback = callback_;
 203   callback_.Reset();
 204   callback.Run(result);
 205 }
 206
 207 class HttpResponseBodyDrainerTest : public testing::Test {
 208  protected:
 209   HttpResponseBodyDrainerTest()
 210       : proxy_service_(ProxyService::CreateDirect()),
 211         ssl_config_service_(new SSLConfigServiceDefaults),
 212         http_server_properties_(new HttpServerPropertiesImpl()),
 213         session_(CreateNetworkSession()),
 214         mock_stream_(new MockHttpStream(&result_waiter_)),
 215         drainer_(new HttpResponseBodyDrainer(mock_stream_)) {}
 216
 217   virtual ~HttpResponseBodyDrainerTest() {}
 218
 219   HttpNetworkSession* CreateNetworkSession() const {
 220     HttpNetworkSession::Params params;
 221     params.proxy_service = proxy_service_.get();
 222     params.ssl_config_service = ssl_config_service_.get();
 223     params.http_server_properties = http_server_properties_->GetWeakPtr();
 224     return new HttpNetworkSession(params);
 225   }
 226
 227   scoped_ptr<ProxyService> proxy_service_;
 228   scoped_refptr<SSLConfigService> ssl_config_service_;
 229   scoped_ptr<HttpServerPropertiesImpl> http_server_properties_;
 230   const scoped_refptr<HttpNetworkSession> session_;
 231   CloseResultWaiter result_waiter_;
 232   MockHttpStream* const mock_stream_;  // Owned by |drainer_|.
 233   HttpResponseBodyDrainer* const drainer_;  // Deletes itself.
 234 };
 235
 236 TEST_F(HttpResponseBodyDrainerTest, DrainBodySyncSingleOK) {
 237   mock_stream_->set_num_chunks(1);
 238   mock_stream_->set_sync();
 239   drainer_->Start(session_.get());
 240   EXPECT_FALSE(result_waiter_.WaitForResult());
 241 }
 242
 243 TEST_F(HttpResponseBodyDrainerTest, DrainBodySyncOK) {
 244   mock_stream_->set_num_chunks(3);
 245   mock_stream_->set_sync();
 246   drainer_->Start(session_.get());
 247   EXPECT_FALSE(result_waiter_.WaitForResult());
 248 }
 249
 250 TEST_F(HttpResponseBodyDrainerTest, DrainBodyAsyncOK) {
 251   mock_stream_->set_num_chunks(3);
 252   drainer_->Start(session_.get());
 253   EXPECT_FALSE(result_waiter_.WaitForResult());
 254 }
 255
 256 // Test the case when the final chunk is 0 bytes. This can happen when
 257 // the final 0-byte chunk of a chunk-encoded http response is read in a last
 258 // call to ReadResponseBody, after all data were returned from HttpStream.
 259 TEST_F(HttpResponseBodyDrainerTest, DrainBodyAsyncEmptyChunk) {
 260   mock_stream_->set_num_chunks(4);
 261   mock_stream_->set_is_last_chunk_zero_size();
 262   drainer_->Start(session_.get());
 263   EXPECT_FALSE(result_waiter_.WaitForResult());
 264 }
 265
 266 TEST_F(HttpResponseBodyDrainerTest, DrainBodySyncEmptyChunk) {
 267   mock_stream_->set_num_chunks(4);
 268   mock_stream_->set_sync();
 269   mock_stream_->set_is_last_chunk_zero_size();
 270   drainer_->Start(session_.get());
 271   EXPECT_FALSE(result_waiter_.WaitForResult());
 272 }
 273
 274 TEST_F(HttpResponseBodyDrainerTest, DrainBodySizeEqualsDrainBuffer) {
 275   mock_stream_->set_num_chunks(
 276       HttpResponseBodyDrainer::kDrainBodyBufferSize / kMagicChunkSize);
 277   drainer_->Start(session_.get());
 278   EXPECT_FALSE(result_waiter_.WaitForResult());
 279 }
 280
 281 TEST_F(HttpResponseBodyDrainerTest, DrainBodyTimeOut) {
 282   mock_stream_->set_num_chunks(2);
 283   mock_stream_->set_stall_reads_forever();
 284   drainer_->Start(session_.get());
 285   EXPECT_TRUE(result_waiter_.WaitForResult());
 286 }
 287
 288 TEST_F(HttpResponseBodyDrainerTest, CancelledBySession) {
 289   mock_stream_->set_num_chunks(2);
 290   mock_stream_->set_stall_reads_forever();
 291   drainer_->Start(session_.get());
 292   // HttpNetworkSession should delete |drainer_|.
 293 }
 294
 295 TEST_F(HttpResponseBodyDrainerTest, DrainBodyTooLarge) {
 296   int too_many_chunks =
 297       HttpResponseBodyDrainer::kDrainBodyBufferSize / kMagicChunkSize;
 298   too_many_chunks += 1;  // Now it's too large.
 299
 300   mock_stream_->set_num_chunks(too_many_chunks);
 301   drainer_->Start(session_.get());
 302   EXPECT_TRUE(result_waiter_.WaitForResult());
 303 }
 304
 305 }  // namespace
 306
 307 }  // namespace net