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| 1 // Copyright (c) 2011 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 "webkit/browser/blob/blob_url_request_job_factory.h" | |
| 6 | |
| 7 #include "base/basictypes.h" | |
| 8 #include "base/compiler_specific.h" | |
| 9 #include "base/message_loop/message_loop_proxy.h" | |
| 10 #include "base/strings/string_util.h" | |
| 11 #include "net/base/request_priority.h" | |
| 12 #include "net/url_request/url_request_context.h" | |
| 13 #include "net/url_request/url_request_job_factory.h" | |
| 14 #include "webkit/browser/blob/blob_data_handle.h" | |
| 15 #include "webkit/browser/blob/blob_storage_context.h" | |
| 16 #include "webkit/browser/blob/blob_url_request_job.h" | |
| 17 #include "webkit/browser/fileapi/file_system_context.h" | |
| 18 | |
| 19 namespace webkit_blob { | |
| 20 | |
| 21 namespace { | |
| 22 | |
| 23 int kUserDataKey; // The value is not important, the addr is a key. | |
| 24 | |
| 25 BlobDataHandle* GetRequestedBlobDataHandle(net::URLRequest* request) { | |
| 26 return static_cast<BlobDataHandle*>(request->GetUserData(&kUserDataKey)); | |
| 27 } | |
| 28 | |
| 29 } // namespace | |
| 30 | |
| 31 // static | |
| 32 scoped_ptr<net::URLRequest> BlobProtocolHandler::CreateBlobRequest( | |
| 33 scoped_ptr<BlobDataHandle> blob_data_handle, | |
| 34 const net::URLRequestContext* request_context, | |
| 35 net::URLRequest::Delegate* request_delegate) { | |
| 36 const GURL kBlobUrl("blob://see_user_data/"); | |
| 37 scoped_ptr<net::URLRequest> request = request_context->CreateRequest( | |
| 38 kBlobUrl, net::DEFAULT_PRIORITY, request_delegate, NULL); | |
| 39 SetRequestedBlobDataHandle(request.get(), blob_data_handle.Pass()); | |
| 40 return request.Pass(); | |
| 41 } | |
| 42 | |
| 43 // static | |
| 44 void BlobProtocolHandler::SetRequestedBlobDataHandle( | |
| 45 net::URLRequest* request, | |
| 46 scoped_ptr<BlobDataHandle> blob_data_handle) { | |
| 47 request->SetUserData(&kUserDataKey, blob_data_handle.release()); | |
| 48 } | |
| 49 | |
| 50 BlobProtocolHandler::BlobProtocolHandler( | |
| 51 BlobStorageContext* context, | |
| 52 fileapi::FileSystemContext* file_system_context, | |
| 53 base::MessageLoopProxy* loop_proxy) | |
| 54 : file_system_context_(file_system_context), | |
| 55 file_loop_proxy_(loop_proxy) { | |
| 56 if (context) | |
| 57 context_ = context->AsWeakPtr(); | |
| 58 } | |
| 59 | |
| 60 BlobProtocolHandler::~BlobProtocolHandler() { | |
| 61 } | |
| 62 | |
| 63 net::URLRequestJob* BlobProtocolHandler::MaybeCreateJob( | |
| 64 net::URLRequest* request, net::NetworkDelegate* network_delegate) const { | |
| 65 return new webkit_blob::BlobURLRequestJob( | |
| 66 request, network_delegate, LookupBlobData(request), | |
| 67 file_system_context_, file_loop_proxy_); | |
| 68 } | |
| 69 | |
| 70 scoped_refptr<webkit_blob::BlobData> | |
| 71 BlobProtocolHandler::LookupBlobData(net::URLRequest* request) const { | |
| 72 BlobDataHandle* blob_data_handle = GetRequestedBlobDataHandle(request); | |
| 73 if (blob_data_handle) | |
| 74 return blob_data_handle->data(); | |
| 75 if (!context_.get()) | |
| 76 return NULL; | |
| 77 | |
| 78 // Support looking up based on uuid, the FeedbackExtensionAPI relies on this. | |
| 79 // TODO(michaeln): Replace this use case and others like it with a BlobReader | |
| 80 // impl that does not depend on urlfetching to perform this function. | |
| 81 const std::string kPrefix("blob:uuid/"); | |
| 82 if (!StartsWithASCII(request->url().spec(), kPrefix, true)) | |
| 83 return NULL; | |
| 84 std::string uuid = request->url().spec().substr(kPrefix.length()); | |
| 85 scoped_ptr<BlobDataHandle> handle = context_->GetBlobDataFromUUID(uuid); | |
| 86 return handle.get() ? handle->data() : NULL; | |
| 87 } | |
| 88 | |
| 89 } // namespace webkit_blob | |
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