Upstream version 5.34.104.0
[platform/framework/web/crosswalk.git] / src / net / url_request / url_fetcher_core.h
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 #ifndef NET_URL_REQUEST_URL_FETCHER_CORE_H_
6 #define NET_URL_REQUEST_URL_FETCHER_CORE_H_
7
8 #include <set>
9 #include <string>
10
11 #include "base/basictypes.h"
12 #include "base/compiler_specific.h"
13 #include "base/debug/stack_trace.h"
14 #include "base/files/file_path.h"
15 #include "base/lazy_instance.h"
16 #include "base/memory/ref_counted.h"
17 #include "base/memory/scoped_ptr.h"
18 #include "base/timer/timer.h"
19 #include "net/base/host_port_pair.h"
20 #include "net/http/http_request_headers.h"
21 #include "net/url_request/url_fetcher.h"
22 #include "net/url_request/url_request.h"
23 #include "net/url_request/url_request_status.h"
24 #include "url/gurl.h"
25
26 namespace base {
27 class SingleThreadTaskRunner;
28 }  // namespace base
29
30 namespace net {
31 class DrainableIOBuffer;
32 class HttpResponseHeaders;
33 class IOBuffer;
34 class URLFetcherDelegate;
35 class URLFetcherResponseWriter;
36 class URLRequestContextGetter;
37 class URLRequestThrottlerEntryInterface;
38
39 class URLFetcherCore
40     : public base::RefCountedThreadSafe<URLFetcherCore>,
41       public URLRequest::Delegate {
42  public:
43   URLFetcherCore(URLFetcher* fetcher,
44                  const GURL& original_url,
45                  URLFetcher::RequestType request_type,
46                  URLFetcherDelegate* d);
47
48   // Starts the load.  It's important that this not happen in the constructor
49   // because it causes the IO thread to begin AddRef()ing and Release()ing
50   // us.  If our caller hasn't had time to fully construct us and take a
51   // reference, the IO thread could interrupt things, run a task, Release()
52   // us, and destroy us, leaving the caller with an already-destroyed object
53   // when construction finishes.
54   void Start();
55
56   // Stops any in-progress load and ensures no callback will happen.  It is
57   // safe to call this multiple times.
58   void Stop();
59
60   // URLFetcher-like functions.
61
62   // For POST requests, set |content_type| to the MIME type of the
63   // content and set |content| to the data to upload.
64   void SetUploadData(const std::string& upload_content_type,
65                      const std::string& upload_content);
66   void SetUploadFilePath(const std::string& upload_content_type,
67                          const base::FilePath& file_path,
68                          uint64 range_offset,
69                          uint64 range_length,
70                          scoped_refptr<base::TaskRunner> file_task_runner);
71   void SetChunkedUpload(const std::string& upload_content_type);
72   // Adds a block of data to be uploaded in a POST body. This can only be
73   // called after Start().
74   void AppendChunkToUpload(const std::string& data, bool is_last_chunk);
75   // |flags| are flags to apply to the load operation--these should be
76   // one or more of the LOAD_* flags defined in net/base/load_flags.h.
77   void SetLoadFlags(int load_flags);
78   int GetLoadFlags() const;
79   void SetReferrer(const std::string& referrer);
80   void SetReferrerPolicy(URLRequest::ReferrerPolicy referrer_policy);
81   void SetExtraRequestHeaders(const std::string& extra_request_headers);
82   void AddExtraRequestHeader(const std::string& header_line);
83   void SetRequestContext(URLRequestContextGetter* request_context_getter);
84   // Set the URL that should be consulted for the third-party cookie
85   // blocking policy.
86   void SetFirstPartyForCookies(const GURL& first_party_for_cookies);
87   // Set the key and data callback that is used when setting the user
88   // data on any URLRequest objects this object creates.
89   void SetURLRequestUserData(
90       const void* key,
91       const URLFetcher::CreateDataCallback& create_data_callback);
92   void SetStopOnRedirect(bool stop_on_redirect);
93   void SetAutomaticallyRetryOn5xx(bool retry);
94   void SetMaxRetriesOn5xx(int max_retries);
95   int GetMaxRetriesOn5xx() const;
96   base::TimeDelta GetBackoffDelay() const;
97   void SetAutomaticallyRetryOnNetworkChanges(int max_retries);
98   void SaveResponseToFileAtPath(
99       const base::FilePath& file_path,
100       scoped_refptr<base::SequencedTaskRunner> file_task_runner);
101   void SaveResponseToTemporaryFile(
102       scoped_refptr<base::SequencedTaskRunner> file_task_runner);
103   void SaveResponseWithWriter(
104       scoped_ptr<URLFetcherResponseWriter> response_writer);
105   HttpResponseHeaders* GetResponseHeaders() const;
106   HostPortPair GetSocketAddress() const;
107   bool WasFetchedViaProxy() const;
108   const GURL& GetOriginalURL() const;
109   const GURL& GetURL() const;
110   const URLRequestStatus& GetStatus() const;
111   int GetResponseCode() const;
112   const ResponseCookies& GetCookies() const;
113   // Reports that the received content was malformed (i.e. failed parsing
114   // or validation).  This makes the throttling logic that does exponential
115   // back-off when servers are having problems treat the current request as
116   // a failure.  Your call to this method will be ignored if your request is
117   // already considered a failure based on the HTTP response code or response
118   // headers.
119   void ReceivedContentWasMalformed();
120   bool GetResponseAsString(std::string* out_response_string) const;
121   bool GetResponseAsFilePath(bool take_ownership,
122                              base::FilePath* out_response_path);
123
124   // Overridden from URLRequest::Delegate:
125   virtual void OnReceivedRedirect(URLRequest* request,
126                                   const GURL& new_url,
127                                   bool* defer_redirect) OVERRIDE;
128   virtual void OnResponseStarted(URLRequest* request) OVERRIDE;
129   virtual void OnReadCompleted(URLRequest* request,
130                                int bytes_read) OVERRIDE;
131   virtual void OnCertificateRequested(
132       URLRequest* request,
133       SSLCertRequestInfo* cert_request_info) OVERRIDE;
134
135   URLFetcherDelegate* delegate() const { return delegate_; }
136   static void CancelAll();
137   static int GetNumFetcherCores();
138   static void SetEnableInterceptionForTests(bool enabled);
139   static void SetIgnoreCertificateRequests(bool ignored);
140
141  private:
142   friend class base::RefCountedThreadSafe<URLFetcherCore>;
143
144   class Registry {
145    public:
146     Registry();
147     ~Registry();
148
149     void AddURLFetcherCore(URLFetcherCore* core);
150     void RemoveURLFetcherCore(URLFetcherCore* core);
151
152     void CancelAll();
153
154     int size() const {
155       return fetchers_.size();
156     }
157
158    private:
159     std::set<URLFetcherCore*> fetchers_;
160
161     DISALLOW_COPY_AND_ASSIGN(Registry);
162   };
163
164   virtual ~URLFetcherCore();
165
166   // Wrapper functions that allow us to ensure actions happen on the right
167   // thread.
168   void StartOnIOThread();
169   void StartURLRequest();
170   void DidInitializeWriter(int result);
171   void StartURLRequestWhenAppropriate();
172   void CancelURLRequest(int error);
173   void OnCompletedURLRequest(base::TimeDelta backoff_delay);
174   void InformDelegateFetchIsComplete();
175   void NotifyMalformedContent();
176   void DidFinishWriting(int result);
177   void RetryOrCompleteUrlFetch();
178
179   // Deletes the request, removes it from the registry, and removes the
180   // destruction observer.
181   void ReleaseRequest();
182
183   // Returns the max value of exponential back-off release time for
184   // |original_url_| and |url_|.
185   base::TimeTicks GetBackoffReleaseTime();
186
187   void CompleteAddingUploadDataChunk(const std::string& data,
188                                      bool is_last_chunk);
189
190   // Writes all bytes stored in |data| with |response_writer_|.
191   // Returns OK if all bytes in |data| get written synchronously. Otherwise,
192   // returns ERR_IO_PENDING or a network error code.
193   int WriteBuffer(scoped_refptr<DrainableIOBuffer> data);
194
195   // Used to implement WriteBuffer().
196   void DidWriteBuffer(scoped_refptr<DrainableIOBuffer> data, int result);
197
198   // Read response bytes from the request.
199   void ReadResponse();
200
201   // Notify Delegate about the progress of upload/download.
202   void InformDelegateUploadProgress();
203   void InformDelegateUploadProgressInDelegateThread(int64 current, int64 total);
204   void InformDelegateDownloadProgress();
205   void InformDelegateDownloadProgressInDelegateThread(int64 current,
206                                                       int64 total);
207
208   URLFetcher* fetcher_;              // Corresponding fetcher object
209   GURL original_url_;                // The URL we were asked to fetch
210   GURL url_;                         // The URL we eventually wound up at
211   URLFetcher::RequestType request_type_;  // What type of request is this?
212   URLRequestStatus status_;          // Status of the request
213   URLFetcherDelegate* delegate_;     // Object to notify on completion
214   // Task runner for the creating thread. Used to interact with the delegate.
215   scoped_refptr<base::SingleThreadTaskRunner> delegate_task_runner_;
216   // Task runner for network operations.
217   scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
218   // Task runner for upload file access.
219   scoped_refptr<base::TaskRunner> upload_file_task_runner_;
220   scoped_ptr<URLRequest> request_;   // The actual request this wraps
221   int load_flags_;                   // Flags for the load operation
222   int response_code_;                // HTTP status code for the request
223   scoped_refptr<IOBuffer> buffer_;
224                                      // Read buffer
225   scoped_refptr<URLRequestContextGetter> request_context_getter_;
226                                      // Cookie/cache info for the request
227   GURL first_party_for_cookies_;     // The first party URL for the request
228   // The user data to add to each newly-created URLRequest.
229   const void* url_request_data_key_;
230   URLFetcher::CreateDataCallback url_request_create_data_callback_;
231   ResponseCookies cookies_;          // Response cookies
232   HttpRequestHeaders extra_request_headers_;
233   scoped_refptr<HttpResponseHeaders> response_headers_;
234   bool was_fetched_via_proxy_;
235   HostPortPair socket_address_;
236
237   bool upload_content_set_;          // SetUploadData has been called
238   std::string upload_content_;       // HTTP POST payload
239   base::FilePath upload_file_path_;  // Path to file containing POST payload
240   uint64 upload_range_offset_;       // Offset from the beginning of the file
241                                      // to be uploaded.
242   uint64 upload_range_length_;       // The length of the part of file to be
243                                      // uploaded.
244   std::string upload_content_type_;  // MIME type of POST payload
245   std::string referrer_;             // HTTP Referer header value and policy
246   URLRequest::ReferrerPolicy referrer_policy_;
247   bool is_chunked_upload_;           // True if using chunked transfer encoding
248
249   // Used to determine how long to wait before making a request or doing a
250   // retry.
251   //
252   // Both of them can only be accessed on the IO thread.
253   //
254   // We need not only the throttler entry for |original_URL|, but also
255   // the one for |url|. For example, consider the case that URL A
256   // redirects to URL B, for which the server returns a 500
257   // response. In this case, the exponential back-off release time of
258   // URL A won't increase. If we retry without considering the
259   // back-off constraint of URL B, we may send out too many requests
260   // for URL A in a short period of time.
261   //
262   // Both of these will be NULL if
263   // URLRequestContext::throttler_manager() is NULL.
264   scoped_refptr<URLRequestThrottlerEntryInterface>
265       original_url_throttler_entry_;
266   scoped_refptr<URLRequestThrottlerEntryInterface> url_throttler_entry_;
267
268   // True if the URLFetcher has been cancelled.
269   bool was_cancelled_;
270
271   // Writer object to write response to the destination like file and string.
272   scoped_ptr<URLFetcherResponseWriter> response_writer_;
273
274   // By default any server-initiated redirects are automatically followed.  If
275   // this flag is set to true, however, a redirect will halt the fetch and call
276   // back to to the delegate immediately.
277   bool stop_on_redirect_;
278   // True when we're actually stopped due to a redirect halted by the above.  We
279   // use this to ensure that |url_| is set to the redirect destination rather
280   // than the originally-fetched URL.
281   bool stopped_on_redirect_;
282
283   // If |automatically_retry_on_5xx_| is false, 5xx responses will be
284   // propagated to the observer, if it is true URLFetcher will automatically
285   // re-execute the request, after the back-off delay has expired.
286   // true by default.
287   bool automatically_retry_on_5xx_;
288   // |num_retries_on_5xx_| indicates how many times we've failed to successfully
289   // fetch this URL due to 5xx responses.  Once this value exceeds the maximum
290   // number of retries specified by the owner URLFetcher instance,
291   // we'll give up.
292   int num_retries_on_5xx_;
293   // Maximum retries allowed when 5xx responses are received.
294   int max_retries_on_5xx_;
295   // Back-off time delay. 0 by default.
296   base::TimeDelta backoff_delay_;
297
298   // The number of retries that have been attempted due to ERR_NETWORK_CHANGED.
299   int num_retries_on_network_changes_;
300   // Maximum retries allowed when the request fails with ERR_NETWORK_CHANGED.
301   // 0 by default.
302   int max_retries_on_network_changes_;
303
304   // Timer to poll the progress of uploading for POST and PUT requests.
305   // When crbug.com/119629 is fixed, scoped_ptr is not necessary here.
306   scoped_ptr<base::RepeatingTimer<URLFetcherCore> >
307       upload_progress_checker_timer_;
308   // Number of bytes sent so far.
309   int64 current_upload_bytes_;
310   // Number of bytes received so far.
311   int64 current_response_bytes_;
312   // Total expected bytes to receive (-1 if it cannot be determined).
313   int64 total_response_bytes_;
314
315   // TODO(willchan): Get rid of this after debugging crbug.com/90971.
316   base::debug::StackTrace stack_trace_;
317
318   static base::LazyInstance<Registry> g_registry;
319
320   DISALLOW_COPY_AND_ASSIGN(URLFetcherCore);
321 };
322
323 }  // namespace net
324
325 #endif  // NET_URL_REQUEST_URL_FETCHER_CORE_H_