Fix chrome upload with content uri

webkit/browser/blob/content_url_stream_reader_android.cc

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "webkit/browser/blob/content_url_stream_reader_android.h"
+
+#include "base/file_util.h"
+#include "base/files/file_util_proxy.h"
+#include "base/location.h"
+#include "base/logging.h"
+#include "base/platform_file.h"
+#include "base/task_runner.h"
+#include "net/android/content_uri_utils.h"
+#include "net/base/file_stream.h"
+#include "net/base/io_buffer.h"
+#include "net/base/net_errors.h"
+
+namespace webkit_blob {
+
+const int kOpenFlagsForRead = base::PLATFORM_FILE_OPEN |
+                              base::PLATFORM_FILE_READ |
+                              base::PLATFORM_FILE_ASYNC;
+
+FileStreamReader* FileStreamReader::CreateForContentUrl(
+    base::TaskRunner* task_runner,
+    const GURL& content_url,
+    int64 initial_offset) {
+  return new ContentUrlStreamReader(task_runner, content_url, initial_offset);
+}
+
+ContentUrlStreamReader::ContentUrlStreamReader(
+    base::TaskRunner* task_runner,
+    const GURL& content_url,
+    int64 initial_offset)
+    : task_runner_(task_runner),
+      content_url_(content_url),
+      initial_offset_(initial_offset),
+      weak_factory_(this) {}
+
+ContentUrlStreamReader::~ContentUrlStreamReader() {}
+
+int64 ContentUrlStreamReader::GetLength(
+    const net::Int64CompletionCallback& callback) {
+  net::GetContentUrlLength(task_runner_.get(), content_url_, callback);
+  return net::ERR_IO_PENDING;
+}
+
+int ContentUrlStreamReader::Read(net::IOBuffer* buf, int buf_len,
+                                 const net::CompletionCallback& callback) {
+  if (stream_impl_)
+    return stream_impl_->Read(buf, buf_len, callback);
+  return Open(base::Bind(&ContentUrlStreamReader::DidOpenForRead,
+                         weak_factory_.GetWeakPtr(),
+                         make_scoped_refptr(buf), buf_len, callback));
+}
+
+int ContentUrlStreamReader::Open(const net::CompletionCallback& callback) {
+  DCHECK(!stream_impl_);
+  stream_impl_.reset(new net::FileStream(NULL, task_runner_));
+  const int result = stream_impl_->OpenContentUrl(
+      content_url_, kOpenFlagsForRead,
+      base::Bind(&ContentUrlStreamReader::DidOpenContentUrl,
+                 weak_factory_.GetWeakPtr(),
+                 callback));
+  return result;
+}
+
+void ContentUrlStreamReader::DidOpenContentUrl(
+    const net::CompletionCallback& callback,
+    int result) {
+  if (result != net::OK) {
+    callback.Run(result);
+    return;
+  }
+
+  result = stream_impl_->Seek(
+      net::FROM_BEGIN, initial_offset_,
+      base::Bind(&ContentUrlStreamReader::DidSeekContentUrl,
+                 weak_factory_.GetWeakPtr(),
+                 callback));
+  if (result != net::ERR_IO_PENDING)
+    callback.Run(result);
+}
+
+void ContentUrlStreamReader::DidOpenForRead(
+    net::IOBuffer* buf,
+    int buf_len,
+    const net::CompletionCallback& callback,
+    int open_result) {
+  if (open_result != net::OK) {
+    stream_impl_.reset();
+    callback.Run(open_result);
+    return;
+  }
+  const int read_result = stream_impl_->Read(buf, buf_len, callback);
+  if (read_result != net::ERR_IO_PENDING)
+    callback.Run(read_result);
+}
+
+void ContentUrlStreamReader::DidSeekContentUrl(
+    const net::CompletionCallback& callback,
+    int64 seek_result) {
+  if (seek_result < 0) {
+    callback.Run(static_cast<int>(seek_result));
+    return;
+  }
+  if (seek_result != initial_offset_) {
+    callback.Run(net::ERR_REQUEST_RANGE_NOT_SATISFIABLE);
+    return;
+  }
+  callback.Run(net::OK);
+}
+
+}  // namespace webkit_blob