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| 1 // Copyright 2014 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 "mojo/tools/package_manager/package_fetcher.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/files/file_path.h" | |
| 9 #include "base/files/file_util.h" | |
| 10 #include "mojo/services/network/public/interfaces/url_loader.mojom.h" | |
| 11 | |
| 12 namespace mojo { | |
| 13 | |
| 14 PackageFetcher::PackageFetcher(NetworkService* network_service, | |
| 15 PackageFetcherDelegate* delegate, | |
| 16 const GURL& url) | |
| 17 : delegate_(delegate), | |
| 18 url_(url) { | |
| 19 network_service->CreateURLLoader(GetProxy(&loader_)); | |
| 20 | |
| 21 URLRequestPtr request(URLRequest::New()); | |
| 22 request->url = url.spec(); | |
| 23 request->auto_follow_redirects = true; | |
| 24 | |
| 25 loader_->Start(request.Pass(), | |
| 26 base::Bind(&PackageFetcher::OnReceivedResponse, | |
| 27 base::Unretained(this))); | |
| 28 } | |
| 29 | |
| 30 PackageFetcher::~PackageFetcher() { | |
| 31 } | |
| 32 | |
| 33 void PackageFetcher::OnReceivedResponse(URLResponsePtr response) { | |
| 34 if (response->error) { | |
| 35 printf("Got error %d (%s) for %s\n", | |
| 36 response->error->code, | |
| 37 response->error->description.get().c_str(), | |
| 38 url_.spec().c_str()); | |
| 39 delegate_->FetchFailed(url_); | |
| 40 return; | |
| 41 } | |
| 42 | |
| 43 if (!base::CreateTemporaryFile(&output_file_name_)) { | |
| 44 delegate_->FetchFailed(url_); | |
| 45 return; | |
| 46 } | |
| 47 output_file_.Initialize(output_file_name_, | |
| 48 base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE); | |
| 49 if (!output_file_.IsValid()) { | |
| 50 base::DeleteFile(output_file_name_, false); | |
| 51 delegate_->FetchFailed(url_); | |
| 52 // Danger: may be deleted now. | |
| 53 return; | |
| 54 } | |
| 55 | |
| 56 body_ = response->body.Pass(); | |
| 57 ReadData(MOJO_RESULT_OK); | |
| 58 // Danger: may be deleted now. | |
| 59 } | |
| 60 | |
| 61 void PackageFetcher::ReadData(MojoResult) { | |
| 62 char buf[4096]; | |
| 63 uint32_t num_bytes = sizeof(buf); | |
| 64 MojoResult result = ReadDataRaw(body_.get(), buf, &num_bytes, | |
| 65 MOJO_READ_DATA_FLAG_NONE); | |
| 66 if (result == MOJO_RESULT_SHOULD_WAIT) { | |
| 67 WaitToReadMore(); | |
| 68 } else if (result == MOJO_RESULT_OK) { | |
| 69 if (output_file_.WriteAtCurrentPos(buf, num_bytes) != | |
| 70 static_cast<int>(num_bytes)) { | |
| 71 // Clean up the output file. | |
| 72 output_file_.Close(); | |
| 73 base::DeleteFile(output_file_name_, false); | |
| 74 | |
| 75 delegate_->FetchFailed(url_); | |
| 76 // Danger: may be deleted now. | |
| 77 return; | |
| 78 } | |
| 79 WaitToReadMore(); | |
| 80 } else if (result == MOJO_RESULT_FAILED_PRECONDITION) { | |
| 81 // Done. | |
| 82 output_file_.Close(); | |
| 83 delegate_->FetchSucceeded(url_, output_file_name_); | |
| 84 // Danger: may be deleted now. | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 void PackageFetcher::WaitToReadMore() { | |
| 89 handle_watcher_.Start( | |
| 90 body_.get(), | |
| 91 MOJO_HANDLE_SIGNAL_READABLE, | |
| 92 MOJO_DEADLINE_INDEFINITE, | |
| 93 base::Bind(&PackageFetcher::ReadData, base::Unretained(this))); | |
| 94 } | |
| 95 | |
| 96 } // namespace mojo | |
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