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| 1 // Copyright (c) 2013 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 COMPONENTS_RAPPOR_LOG_UPLOADER_H_ |
| 6 #define COMPONENTS_RAPPOR_LOG_UPLOADER_H_ |
| 7 |
| 8 #include <queue> |
| 9 #include <string> |
| 10 |
| 11 #include "base/memory/weak_ptr.h" |
| 12 #include "base/time/time.h" |
| 13 #include "base/timer/timer.h" |
| 14 #include "net/url_request/url_fetcher.h" |
| 15 #include "net/url_request/url_fetcher_delegate.h" |
| 16 #include "net/url_request/url_request_context_getter.h" |
| 17 |
| 18 namespace rappor { |
| 19 |
| 20 // Handles uploading logs to an external server. |
| 21 class LogUploader : public net::URLFetcherDelegate { |
| 22 public: |
| 23 LogUploader(const char* server_url, const char* mime_type); |
| 24 |
| 25 void SetRequestContext(net::URLRequestContextGetter* request_context); |
| 26 |
| 27 void QueueLog(const std::string& logData); |
| 28 |
| 29 private: |
| 30 // The server URL to upload logs to. |
| 31 const char* server_url_; |
| 32 |
| 33 // The mime type to specify on uploaded logs. |
| 34 const char* mime_type_; |
| 35 |
| 36 net::URLRequestContextGetter* request_context_; |
| 37 |
| 38 // The outstanding transmission appears as a URL Fetch operation. |
| 39 scoped_ptr<net::URLFetcher> current_fetch_; |
| 40 |
| 41 // The logs that still need to be uploaded. |
| 42 std::queue<std::string> queued_logs_; |
| 43 |
| 44 base::OneShotTimer<LogUploader> upload_timer_; |
| 45 |
| 46 // Indicates that the last triggered upload hasn't resolved yet. |
| 47 bool callback_pending_; |
| 48 |
| 49 // The interval between being told an upload is done and starting the next |
| 50 // upload. |
| 51 base::TimeDelta upload_interval_; |
| 52 |
| 53 // Starts transmission of the next log. |
| 54 void StartScheduledUpload(); |
| 55 |
| 56 // Schedules a future call to StartScheduledUpload if one isn't already |
| 57 // pending. |
| 58 void ScheduleNextUpload(); |
| 59 |
| 60 // Increases the upload interval each time it's called, to handle the case |
| 61 // where the server is having issues. |
| 62 void BackOffUploadInterval(); |
| 63 |
| 64 // Implementation of net::URLFetcherDelegate. Called after transmission |
| 65 // completes (either successfully or with failure). |
| 66 virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE; |
| 67 |
| 68 // Called when the upload is completed. |
| 69 void UploadFinished(bool server_is_healthy, bool more_logs_remaining); |
| 70 }; |
| 71 |
| 72 } // namespace rappor |
| 73 |
| 74 #endif // COMPONENTS_RAPPOR_LOG_UPLOADER_H_ |
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