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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.
#ifndef WEBKIT_APPCACHE_APPCACHE_URL_REQUEST_JOB_H_
#define WEBKIT_APPCACHE_APPCACHE_URL_REQUEST_JOB_H_
#include <string>
#include "net/url_request/url_request_job.h"
#include "webkit/appcache/appcache_entry.h"
#include "webkit/appcache/appcache_response.h"
#include "webkit/appcache/appcache_storage.h"
namespace appcache {
// A URLRequestJob derivative that knows how to return a response stored
// in the appcache.
class AppCacheURLRequestJob : public URLRequestJob,
public AppCacheStorage::Delegate {
public:
explicit AppCacheURLRequestJob(URLRequest* request,
AppCacheStorage* storage);
virtual ~AppCacheURLRequestJob();
// Informs the job of what response it should deliver. Only one of these
// methods should be called, and only once per job. A job will sit idle and
// wait indefinitely until one of the deliver methods is called.
void DeliverAppCachedResponse(const GURL& manifest_url, int64 cache_id,
const AppCacheEntry& entry);
void DeliverNetworkResponse();
void DeliverErrorResponse();
bool is_waiting() const {
return delivery_type_ == AWAITING_DELIVERY_ORDERS;
}
bool is_delivering_appcache_response() const {
return delivery_type_ == APPCACHED_DELIVERY;
}
bool is_delivering_network_response() const {
return delivery_type_ == NETWORK_DELIVERY;
}
bool is_delivering_error_response() const {
return delivery_type_ == ERROR_DELIVERY;
}
// Accessors for the info about the appcached response, if any,
// that this job has been instructed to deliver. These are only
// valid to call if is_delivering_appcache_response.
const GURL& manifest_url() { return manifest_url_; }
int64 cache_id() { return cache_id_; }
const AppCacheEntry& entry() { return entry_; }
// URLRequestJob's Kill method is made public so the users of this
// class in the appcache namespace can call it.
virtual void Kill();
// Returns true if the job has been started by the net library.
bool has_been_started() const {
return has_been_started_;
}
// Returns true if the job has been killed.
bool has_been_killed() const {
return has_been_killed_;
}
private:
friend class AppCacheRequestHandlerTest;
friend class AppCacheURLRequestJobTest;
enum DeliveryType {
AWAITING_DELIVERY_ORDERS,
APPCACHED_DELIVERY,
NETWORK_DELIVERY,
ERROR_DELIVERY
};
// Returns true if one of the Deliver methods has been called.
bool has_delivery_orders() const {
return !is_waiting();
}
void MaybeBeginDelivery();
void BeginDelivery();
// AppCacheStorage::Delegate methods
virtual void OnResponseInfoLoaded(
AppCacheResponseInfo* response_info, int64 response_id);
const net::HttpResponseInfo* http_info() const {
return info_.get() ? info_->http_response_info() : NULL;
}
// AppCacheResponseReader completion callback
void OnReadComplete(int result);
// URLRequestJob methods, see url_request_job.h for doc comments
virtual void Start();
virtual net::LoadState GetLoadState() const;
virtual bool GetCharset(std::string* charset);
virtual void GetResponseInfo(net::HttpResponseInfo* info);
virtual bool GetMoreData();
virtual bool ReadRawData(net::IOBuffer* buf, int buf_size, int *bytes_read);
// Sets extra request headers for Job types that support request headers.
// TODO(michaeln): support for range-requests
virtual void SetExtraRequestHeaders(const std::string& headers) {}
// TODO(michaeln): does this apply to our cached responses?
// The payload we store should have been fully decoded prior to
// us storing it. Maybe we should strip the content-encoding headers
// when writing the response to the cache.
// virtual bool GetContentEncodings(
// std::vector<Filter::FilterType>* encoding_types);
// FilterContext methods
virtual bool GetMimeType(std::string* mime_type) const;
virtual int GetResponseCode() const;
virtual bool IsCachedContent() const {
return is_delivering_appcache_response();
}
AppCacheStorage* storage_;
bool has_been_started_;
bool has_been_killed_;
DeliveryType delivery_type_;
GURL manifest_url_;
int64 cache_id_;
AppCacheEntry entry_;
scoped_refptr<AppCacheResponseInfo> info_;
scoped_ptr<AppCacheResponseReader> reader_;
net::CompletionCallbackImpl<AppCacheURLRequestJob> read_callback_;
};
} // namespace appcache
#endif // WEBKIT_APPCACHE_APPCACHE_REQUEST_HANDLER_H_
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