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// Copyright (c) 2010 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/base/data_url.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/webkit_glue.h"
namespace {
const char kHttpScheme[] = "http";
const char kHttpsScheme[] = "https";
const char kDataScheme[] = "data";
// A helper method that accepts only HTTP, HTTPS and FILE protocol.
bool IsDataProtocol(const GURL& url) {
return url.SchemeIs(kDataScheme);
}
} // namespace
namespace webkit_glue {
SimpleDataSource::SimpleDataSource(
MessageLoop* render_loop,
webkit_glue::MediaResourceLoaderBridgeFactory* bridge_factory)
: render_loop_(render_loop),
bridge_factory_(bridge_factory),
size_(-1),
single_origin_(true),
state_(UNINITIALIZED) {
DCHECK(render_loop);
}
SimpleDataSource::~SimpleDataSource() {
AutoLock auto_lock(lock_);
DCHECK(state_ == UNINITIALIZED || state_ == STOPPED);
}
void SimpleDataSource::Stop(media::FilterCallback* callback) {
AutoLock auto_lock(lock_);
state_ = STOPPED;
if (callback) {
callback->Run();
delete callback;
}
// Post a task to the render thread to cancel loading the resource.
render_loop_->PostTask(FROM_HERE,
NewRunnableMethod(this, &SimpleDataSource::CancelTask));
}
void SimpleDataSource::Initialize(const std::string& url,
media::FilterCallback* callback) {
AutoLock auto_lock(lock_);
DCHECK_EQ(state_, UNINITIALIZED);
DCHECK(callback);
state_ = INITIALIZING;
initialize_callback_.reset(callback);
// Validate the URL.
SetURL(GURL(url));
if (!url_.is_valid() || !IsProtocolSupportedForMedia(url_)) {
host()->SetError(media::PIPELINE_ERROR_NETWORK);
initialize_callback_->Run();
initialize_callback_.reset();
return;
}
// Post a task to the render thread to start loading the resource.
render_loop_->PostTask(FROM_HERE,
NewRunnableMethod(this, &SimpleDataSource::StartTask));
}
const media::MediaFormat& SimpleDataSource::media_format() {
return media_format_;
}
void SimpleDataSource::Read(int64 position,
size_t size,
uint8* data,
ReadCallback* read_callback) {
DCHECK_GE(size_, 0);
if (position >= size_) {
read_callback->RunWithParams(Tuple1<size_t>(0));
delete read_callback;
} else {
size_t copied = std::min(size, static_cast<size_t>(size_ - position));
memcpy(data, data_.c_str() + position, copied);
read_callback->RunWithParams(Tuple1<size_t>(copied));
delete read_callback;
}
}
bool SimpleDataSource::GetSize(int64* size_out) {
*size_out = size_;
return true;
}
bool SimpleDataSource::IsStreaming() {
return false;
}
bool SimpleDataSource::OnReceivedRedirect(
const GURL& new_url,
const webkit_glue::ResourceResponseInfo& info,
bool* has_new_first_party_for_cookies,
GURL* new_first_party_for_cookies) {
DCHECK(MessageLoop::current() == render_loop_);
single_origin_ = url_.GetOrigin() == new_url.GetOrigin();
// TODO(wtc): should we return a new first party for cookies URL?
*has_new_first_party_for_cookies = false;
return true;
}
void SimpleDataSource::OnReceivedResponse(
const webkit_glue::ResourceResponseInfo& info,
bool content_filtered) {
DCHECK(MessageLoop::current() == render_loop_);
size_ = info.content_length;
}
void SimpleDataSource::OnReceivedData(const char* data, int len) {
DCHECK(MessageLoop::current() == render_loop_);
data_.append(data, len);
}
void SimpleDataSource::OnCompletedRequest(const URLRequestStatus& status,
const std::string& security_info,
const base::Time& completion_time) {
DCHECK(MessageLoop::current() == render_loop_);
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.
if (size_ == -1)
size_ = data_.length();
DCHECK(static_cast<size_t>(size_) == data_.length());
DoneInitialization_Locked(status.is_success());
}
bool SimpleDataSource::HasSingleOrigin() {
DCHECK(MessageLoop::current() == render_loop_);
return single_origin_;
}
void SimpleDataSource::Abort() {
DCHECK(MessageLoop::current() == render_loop_);
NOTIMPLEMENTED();
}
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() {
DCHECK(MessageLoop::current() == render_loop_);
AutoLock auto_lock(lock_);
// We may have stopped.
if (state_ == STOPPED)
return;
DCHECK_EQ(state_, INITIALIZING);
if (IsDataProtocol(url_)) {
// If this using data protocol, we just need to decode it.
std::string mime_type, charset;
bool success = net::DataURL::Parse(url_, &mime_type, &charset, &data_);
// Don't care about the mime-type just proceed if decoding was successful.
size_ = data_.length();
DoneInitialization_Locked(success);
} else {
// 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() {
DCHECK(MessageLoop::current() == render_loop_);
AutoLock auto_lock(lock_);
DCHECK_EQ(state_, STOPPED);
// Cancel any pending requests.
if (bridge_.get()) {
bridge_->Cancel();
bridge_.reset();
}
}
void SimpleDataSource::DoneInitialization_Locked(bool success) {
lock_.AssertAcquired();
if (success) {
state_ = INITIALIZED;
host()->SetTotalBytes(size_);
host()->SetBufferedBytes(size_);
// If scheme is file or data, say we are loaded.
host()->SetLoaded(url_.SchemeIsFile() || IsDataProtocol(url_));
} else {
host()->SetError(media::PIPELINE_ERROR_NETWORK);
}
initialize_callback_->Run();
initialize_callback_.reset();
}
} // namespace webkit_glue
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