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/*
* Copyright 2010, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef URL_FETCHER_PROXY_H_
#define URL_FETCHER_PROXY_H_
#include "android/autofill/android_url_request_context_getter.h"
#include "android/autofill/profile_android.h"
#include "base/scoped_ptr.h"
#include "base/threading/thread.h"
#include "common/net/url_fetcher.h"
#include "net/url_request/url_request_status.h"
class URLFetcherProxy;
// The URLFetcherProxy uses RunnableMethod to call functions on it in
// another thread, but (since it's trying to behave like a URLFetcher)
// isn't reference counted. This specialisation makes RunnableMethod
// work with a non-reference-counted object by not manipulating the
// reference counts.
// TODO: Investigate alternatives to using RunnableMethod that don't
// expect a ref counted object so we can remove this if possible.
template <>
struct RunnableMethodTraits<class URLFetcherProxy> {
void RetainCallee(URLFetcherProxy* obj) {
}
void ReleaseCallee(URLFetcherProxy* obj) {
}
};
// A class that implements the same API as URLFetcher but instead of
// assuming that the calling thread is a chrome thread with a message
// loop, it assumes the calling thread is WebKit's main thread.
//
// It extends URLFetcher so as to minimise the diff in other code when
// using this class in place of URLFetcher. It uses a private
// URLFetcher instance to do the network request and thus implements
// URLFetcher::Delegate. We always use
// ProfileImplAndroid::GetDefaultRequestContext() as the request
// context.
//
// Note that we overide the minimum number of methods to allow this
// class to be used by AutoFillDownloadManager ...
// - set_upload_data()
// - set_automatically_retry_on_5xx()
// - Start()
class URLFetcherProxy : public URLFetcher, public URLFetcher::Delegate {
public:
URLFetcherProxy(const GURL& url,
URLFetcher::RequestType request_type,
URLFetcher::Delegate* d)
: URLFetcher(url /*unused*/, URLFetcher::POST /*unused*/, d),
request_type_(request_type),
retry_(true),
url_(url)
{
}
virtual ~URLFetcherProxy()
{
pending_callbacks_.erase(this);
}
virtual void set_automatically_retry_on_5xx(bool retry)
{
retry_ = retry;
}
virtual void set_upload_data(const std::string& upload_content_type,
const std::string& upload_content)
{
upload_content_type_ = upload_content_type;
upload_content_ = upload_content;
}
virtual void Start()
{
scoped_refptr<net::URLRequestContextGetter> con = request_context();
CHECK(con.get()) << "No URLRequestContextGetter!";
scoped_refptr<base::MessageLoopProxy> mlp = con->GetIOMessageLoopProxy();
// TODO: See the template specialisation at the top of the file. Can we use
// an alternative to RunnableMethod that doesn't expect a ref counted object?
mlp->PostTask(FROM_HERE, NewRunnableMethod(this, &URLFetcherProxy::DoStart));
};
virtual void OnURLFetchComplete(const URLFetcher* source,
const GURL& url,
const net::URLRequestStatus& status,
int response_code,
const ResponseCookies& cookies,
const std::string& data)
{
url_ = url;
status_ = status;
response_code_ = response_code;
cookies_ = cookies;
data_ = data;
pending_callbacks_[this] = true;
DoComplete(this);
}
net::HttpResponseHeaders* response_headers() const {return real_fetcher_->response_headers();};
// Returns the back-off delay before the request will be retried,
// when a 5xx response was received.
base::TimeDelta backoff_delay() const { return real_fetcher_->backoff_delay();};
private:
void DoStart()
{
real_fetcher_.reset(new URLFetcher(url_, request_type_, this));
real_fetcher_->set_automatically_retry_on_5xx(retry_);
// We expect set_upload_data() to have been called on this object.
real_fetcher_->set_upload_data(upload_content_type_, upload_content_);
real_fetcher_->set_request_context(request_context());
real_fetcher_->Start();
};
static void DoComplete(void* context)
{
URLFetcherProxy* that = static_cast<URLFetcherProxy*>(context);
if (pending_callbacks_[that]) {
that->DoCompleteImpl();
}
}
void DoCompleteImpl()
{
delegate()->OnURLFetchComplete(this, url_, status_, response_code_, cookies_, data_);
}
scoped_ptr<URLFetcher> real_fetcher_;
URLFetcher::RequestType request_type_;
bool retry_;
std::string upload_content_type_;
std::string upload_content_;
GURL url_;
net::URLRequestStatus status_;
int response_code_;
ResponseCookies cookies_;
std::string data_;
static std::map<URLFetcherProxy*, bool> pending_callbacks_;
DISALLOW_EVIL_CONSTRUCTORS(URLFetcherProxy);
};
#endif // URL_FETCHER_PROXY_H_
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