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| 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_REQUEST_SIMPLE_JOB_H_ | |
| 6 #define NET_URL_REQUEST_URL_REQUEST_SIMPLE_JOB_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/memory/ref_counted.h" | |
| 11 #include "base/memory/weak_ptr.h" | |
| 12 #include "base/strings/string_piece.h" | |
| 13 #include "net/base/completion_callback.h" | |
| 14 #include "net/base/net_export.h" | |
| 15 #include "net/url_request/url_range_request_job.h" | |
| 16 | |
| 17 namespace base { | |
| 18 class RefCountedMemory; | |
| 19 } | |
| 20 | |
| 21 namespace net { | |
| 22 | |
| 23 class URLRequest; | |
| 24 | |
| 25 class NET_EXPORT URLRequestSimpleJob : public URLRangeRequestJob { | |
| 26 public: | |
| 27 URLRequestSimpleJob(URLRequest* request, NetworkDelegate* network_delegate); | |
| 28 | |
| 29 void Start() override; | |
| 30 bool ReadRawData(IOBuffer* buf, int buf_size, int* bytes_read) override; | |
| 31 bool GetMimeType(std::string* mime_type) const override; | |
| 32 bool GetCharset(std::string* charset) override; | |
| 33 | |
| 34 protected: | |
| 35 ~URLRequestSimpleJob() override; | |
| 36 | |
| 37 // Subclasses must override either GetData or GetRefCountedData to define the | |
| 38 // way response data is determined. | |
| 39 // The return value should be: | |
| 40 // - OK if data is obtained; | |
| 41 // - ERR_IO_PENDING if async processing is needed to finish obtaining data. | |
| 42 // This is the only case when |callback| should be called after | |
| 43 // completion of the operation. In other situations |callback| should | |
| 44 // never be called; | |
| 45 // - any other ERR_* code to indicate an error. This code will be used | |
| 46 // as the error code in the URLRequestStatus when the URLRequest | |
| 47 // is finished. | |
| 48 virtual int GetData(std::string* mime_type, | |
| 49 std::string* charset, | |
| 50 std::string* data, | |
| 51 const CompletionCallback& callback) const; | |
| 52 | |
| 53 // Similar to GetData(), except |*data| can share ownership of the bytes | |
| 54 // instead of copying them into a std::string. | |
| 55 virtual int GetRefCountedData(std::string* mime_type, | |
| 56 std::string* charset, | |
| 57 scoped_refptr<base::RefCountedMemory>* data, | |
| 58 const CompletionCallback& callback) const; | |
| 59 | |
| 60 // Returns the task runner used by ReadRawData. This method is virtual so | |
| 61 // that it can be overridden in tests. | |
| 62 virtual base::TaskRunner* GetTaskRunner() const; | |
| 63 | |
| 64 void StartAsync(); | |
| 65 | |
| 66 private: | |
| 67 void OnGetDataCompleted(int result); | |
| 68 void OnReadCompleted(int bytes_read); | |
| 69 | |
| 70 HttpByteRange byte_range_; | |
| 71 std::string mime_type_; | |
| 72 std::string charset_; | |
| 73 scoped_refptr<base::RefCountedMemory> data_; | |
| 74 int64 next_data_offset_; | |
| 75 scoped_refptr<base::TaskRunner> task_runner_; | |
| 76 base::WeakPtrFactory<URLRequestSimpleJob> weak_factory_; | |
| 77 }; | |
| 78 | |
| 79 } // namespace net | |
| 80 | |
| 81 #endif // NET_URL_REQUEST_URL_REQUEST_SIMPLE_JOB_H_ | |
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