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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/weak_ptr.h"
     11 #include "net/base/completion_callback.h"
     12 #include "net/base/net_export.h"
     13 #include "net/url_request/url_range_request_job.h"
     14 
     15 namespace net {
     16 
     17 class URLRequest;
     18 
     19 class NET_EXPORT URLRequestSimpleJob : public URLRangeRequestJob {
     20  public:
     21   URLRequestSimpleJob(URLRequest* request, NetworkDelegate* network_delegate);
     22 
     23   virtual void Start() OVERRIDE;
     24   virtual bool ReadRawData(IOBuffer* buf,
     25                            int buf_size,
     26                            int *bytes_read) OVERRIDE;
     27   virtual bool GetMimeType(std::string* mime_type) const OVERRIDE;
     28   virtual bool GetCharset(std::string* charset) OVERRIDE;
     29 
     30  protected:
     31   virtual ~URLRequestSimpleJob();
     32 
     33   // Subclasses must override the way response data is determined.
     34   // The return value should be:
     35   //  - OK if data is obtained;
     36   //  - ERR_IO_PENDING if async processing is needed to finish obtaining data.
     37   //    This is the only case when |callback| should be called after
     38   //    completion of the operation. In other situations |callback| should
     39   //    never be called;
     40   //  - any other ERR_* code to indicate an error. This code will be used
     41   //    as the error code in the URLRequestStatus when the URLRequest
     42   //    is finished.
     43   virtual int GetData(std::string* mime_type,
     44                       std::string* charset,
     45                       std::string* data,
     46                       const CompletionCallback& callback) const = 0;
     47 
     48  protected:
     49   void StartAsync();
     50 
     51  private:
     52   void OnGetDataCompleted(int result);
     53 
     54   HttpByteRange byte_range_;
     55   std::string mime_type_;
     56   std::string charset_;
     57   std::string data_;
     58   int data_offset_;
     59   base::WeakPtrFactory<URLRequestSimpleJob> weak_factory_;
     60 };
     61 
     62 }  // namespace net
     63 
     64 #endif  // NET_URL_REQUEST_URL_REQUEST_SIMPLE_JOB_H_
     65