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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 "webkit/appcache/appcache_url_request_job.h"
#include "base/message_loop.h"
#include "net/url_request/url_request_status.h"
namespace appcache {
AppCacheURLRequestJob::AppCacheURLRequestJob(
URLRequest* request, AppCacheStorage* storage)
: URLRequestJob(request), storage_(storage),
has_been_started_(false), has_been_killed_(false),
delivery_type_(AWAITING_DELIVERY_ORDERS),
cache_id_(kNoCacheId),
ALLOW_THIS_IN_INITIALIZER_LIST(read_callback_(
this, &AppCacheURLRequestJob::OnReadComplete)) {
DCHECK(storage_);
}
AppCacheURLRequestJob::~AppCacheURLRequestJob() {
if (storage_)
storage_->CancelDelegateCallbacks(this);
}
void AppCacheURLRequestJob::DeliverAppCachedResponse(
const GURL& manifest_url, int64 cache_id, const AppCacheEntry& entry) {
DCHECK(!has_delivery_orders());
DCHECK(entry.has_response_id());
delivery_type_ = APPCACHED_DELIVERY;
manifest_url_ = manifest_url;
cache_id_ = cache_id;
entry_ = entry;
MaybeBeginDelivery();
}
void AppCacheURLRequestJob::DeliverNetworkResponse() {
DCHECK(!has_delivery_orders());
delivery_type_ = NETWORK_DELIVERY;
storage_ = NULL; // not needed
MaybeBeginDelivery();
}
void AppCacheURLRequestJob::DeliverErrorResponse() {
DCHECK(!has_delivery_orders());
delivery_type_ = ERROR_DELIVERY;
storage_ = NULL; // not needed
MaybeBeginDelivery();
}
void AppCacheURLRequestJob::MaybeBeginDelivery() {
if (has_been_started() && has_delivery_orders()) {
// Start asynchronously so that all error reporting and data
// callbacks happen as they would for network requests.
MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod(
this, &AppCacheURLRequestJob::BeginDelivery));
}
}
void AppCacheURLRequestJob::BeginDelivery() {
DCHECK(has_delivery_orders() && has_been_started());
if (has_been_killed())
return;
switch (delivery_type_) {
case NETWORK_DELIVERY:
// To fallthru to the network, we restart the request which will
// cause a new job to be created to retrieve the resource from the
// network. Our caller is responsible for arranging to not re-intercept
// the same request.
NotifyRestartRequired();
break;
case ERROR_DELIVERY:
NotifyStartError(
URLRequestStatus(URLRequestStatus::FAILED, net::ERR_FAILED));
break;
case APPCACHED_DELIVERY:
storage_->LoadResponseInfo(manifest_url_, entry_.response_id(), this);
break;
default:
NOTREACHED();
break;
}
}
void AppCacheURLRequestJob::OnResponseInfoLoaded(
AppCacheResponseInfo* response_info, int64 response_id) {
DCHECK(is_delivering_appcache_response());
scoped_refptr<AppCacheURLRequestJob> protect(this);
if (response_info) {
info_ = response_info;
reader_.reset(
storage_->CreateResponseReader(manifest_url_, entry_.response_id()));
NotifyHeadersComplete();
} else {
NotifyStartError(
URLRequestStatus(URLRequestStatus::FAILED, net::ERR_FAILED));
}
storage_ = NULL; // no longer needed
}
void AppCacheURLRequestJob::OnReadComplete(int result) {
DCHECK(is_delivering_appcache_response());
if (result == 0)
NotifyDone(URLRequestStatus());
else if (result < 0)
NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, result));
else
SetStatus(URLRequestStatus()); // Clear the IO_PENDING status
NotifyReadComplete(result);
}
// URLRequestJob overrides ------------------------------------------------
void AppCacheURLRequestJob::Start() {
DCHECK(!has_been_started());
has_been_started_ = true;
MaybeBeginDelivery();
}
void AppCacheURLRequestJob::Kill() {
if (!has_been_killed_) {
has_been_killed_ = true;
reader_.reset();
if (storage_) {
storage_->CancelDelegateCallbacks(this);
storage_ = NULL;
}
URLRequestJob::Kill();
}
}
net::LoadState AppCacheURLRequestJob::GetLoadState() const {
if (!has_been_started())
return net::LOAD_STATE_IDLE;
if (!has_delivery_orders())
return net::LOAD_STATE_WAITING_FOR_CACHE;
if (delivery_type_ != APPCACHED_DELIVERY)
return net::LOAD_STATE_IDLE;
if (!info_.get())
return net::LOAD_STATE_WAITING_FOR_CACHE;
if (reader_.get() && reader_->IsReadPending())
return net::LOAD_STATE_READING_RESPONSE;
return net::LOAD_STATE_IDLE;
}
bool AppCacheURLRequestJob::GetMimeType(std::string* mime_type) const {
if (!http_info())
return false;
return http_info()->headers->GetMimeType(mime_type);
}
bool AppCacheURLRequestJob::GetCharset(std::string* charset) {
if (!http_info())
return false;
return http_info()->headers->GetCharset(charset);
}
void AppCacheURLRequestJob::GetResponseInfo(net::HttpResponseInfo* info) {
if (!http_info())
return;
*info = *http_info();
}
int AppCacheURLRequestJob::GetResponseCode() const {
if (!http_info())
return -1;
return http_info()->headers->response_code();
}
bool AppCacheURLRequestJob::ReadRawData(net::IOBuffer* buf, int buf_size,
int *bytes_read) {
DCHECK(is_delivering_appcache_response());
DCHECK_NE(buf_size, 0);
DCHECK(bytes_read);
DCHECK(!reader_->IsReadPending());
reader_->ReadData(buf, buf_size, &read_callback_);
SetStatus(URLRequestStatus(URLRequestStatus::IO_PENDING, 0));
return false;
}
} // namespace appcache
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