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// Copyright (c) 2009 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 "base/message_loop.h"
#include "base/process_util.h"
#include "media/base/filter_host.h"
#include "net/base/load_flags.h"
#include "net/http/http_response_headers.h"
#include "net/url_request/url_request_status.h"
#include "webkit/glue/media/simple_data_source.h"
#include "webkit/glue/resource_loader_bridge.h"
#include "webkit/glue/webappcachecontext.h"
namespace {
const char kHttpScheme[] = "http";
const char kHttpsScheme[] = "https";
const char kFtpScheme[] = "ftp";
// A helper method that accepts only HTTP, HTTPS and FILE protocol.
bool IsSchemeSupported(const GURL& url) {
return url.SchemeIs(kHttpScheme) ||
url.SchemeIs(kHttpsScheme) ||
url.SchemeIs(kFtpScheme) ||
url.SchemeIsFile();
}
} // namespace
namespace webkit_glue {
SimpleDataSource::SimpleDataSource(
MessageLoop* render_loop,
webkit_glue::MediaResourceLoaderBridgeFactory* bridge_factory)
: render_loop_(render_loop),
bridge_factory_(bridge_factory),
size_(-1),
position_(0),
state_(UNINITIALIZED) {
DCHECK(render_loop);
}
SimpleDataSource::~SimpleDataSource() {
AutoLock auto_lock(lock_);
DCHECK(state_ == UNINITIALIZED || state_ == STOPPED);
}
void SimpleDataSource::Stop() {
AutoLock auto_lock(lock_);
state_ = STOPPED;
// Post a task to the render thread to cancel loading the resource.
render_loop_->PostTask(FROM_HERE,
NewRunnableMethod(this, &SimpleDataSource::CancelTask));
}
bool SimpleDataSource::Initialize(const std::string& url) {
AutoLock auto_lock(lock_);
DCHECK_EQ(state_, UNINITIALIZED);
state_ = INITIALIZING;
// Validate the URL.
SetURL(GURL(url));
if (!url_.is_valid() || !IsSchemeSupported(url_)) {
host_->Error(media::PIPELINE_ERROR_NETWORK);
return false;
}
// Post a task to the render thread to start loading the resource.
render_loop_->PostTask(FROM_HERE,
NewRunnableMethod(this, &SimpleDataSource::StartTask));
return true;
}
const media::MediaFormat& SimpleDataSource::media_format() {
return media_format_;
}
size_t SimpleDataSource::Read(uint8* data, size_t size) {
DCHECK_GE(size_, 0);
size_t copied = std::min(size, static_cast<size_t>(size_ - position_));
memcpy(data, data_.c_str() + position_, copied);
position_ += copied;
return copied;
}
bool SimpleDataSource::GetPosition(int64* position_out) {
*position_out = position_;
return true;
}
bool SimpleDataSource::SetPosition(int64 position) {
if (position < 0 || position > size_)
return false;
position_ = position;
return true;
}
bool SimpleDataSource::GetSize(int64* size_out) {
*size_out = size_;
return true;
}
bool SimpleDataSource::IsSeekable() {
return true;
}
void SimpleDataSource::OnDownloadProgress(uint64 position, uint64 size) {}
void SimpleDataSource::OnUploadProgress(uint64 position, uint64 size) {}
void SimpleDataSource::OnReceivedRedirect(const GURL& new_url) {
SetURL(new_url);
}
void SimpleDataSource::OnReceivedResponse(
const webkit_glue::ResourceLoaderBridge::ResponseInfo& info,
bool content_filtered) {
size_ = info.content_length;
}
void SimpleDataSource::OnReceivedData(const char* data, int len) {
data_.append(data, len);
}
void SimpleDataSource::OnCompletedRequest(const URLRequestStatus& status,
const std::string& security_info) {
AutoLock auto_lock(lock_);
// It's possible this gets called after Stop(), in which case |host_| is no
// longer valid.
if (state_ == STOPPED) {
return;
}
// Otherwise we should be initializing and have created a bridge.
DCHECK_EQ(state_, INITIALIZING);
DCHECK(bridge_.get());
bridge_.reset();
// If we don't get a content length or the request has failed, report it
// as a network error.
DCHECK(size_ == -1 || size_ == data_.length());
if (size_ == -1) {
size_ = data_.length();
}
if (!status.is_success()) {
host_->Error(media::PIPELINE_ERROR_NETWORK);
return;
}
// We're initialized!
state_ = INITIALIZED;
host_->SetTotalBytes(size_);
host_->SetBufferedBytes(size_);
host_->InitializationComplete();
}
std::string SimpleDataSource::GetURLForDebugging() {
return url_.spec();
}
void SimpleDataSource::SetURL(const GURL& url) {
url_ = url;
media_format_.Clear();
media_format_.SetAsString(media::MediaFormat::kMimeType,
media::mime_type::kApplicationOctetStream);
media_format_.SetAsString(media::MediaFormat::kURL, url.spec());
}
void SimpleDataSource::StartTask() {
AutoLock auto_lock(lock_);
DCHECK(MessageLoop::current() == render_loop_);
// We may have stopped.
if (state_ == STOPPED)
return;
DCHECK_EQ(state_, INITIALIZING);
// Create our bridge and start loading the resource.
bridge_.reset(bridge_factory_->CreateBridge(
url_, net::LOAD_BYPASS_CACHE, -1, -1));
bridge_->Start(this);
}
void SimpleDataSource::CancelTask() {
AutoLock auto_lock(lock_);
DCHECK_EQ(state_, STOPPED);
// Cancel any pending requests.
if (bridge_.get()) {
bridge_->Cancel();
bridge_.reset();
}
}
} // namespace webkit_glue
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