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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.
#ifndef PPAPI_CPP_DEV_URL_LOADER_DEV_H_
#define PPAPI_CPP_DEV_URL_LOADER_DEV_H_
#include "ppapi/c/pp_stdint.h"
#include "ppapi/cpp/resource.h"
namespace pp {
class CompletionCallback;
class Instance;
class URLRequestInfo_Dev;
class URLResponseInfo_Dev;
// URLLoader provides an API to download URLs.
//
// EXAMPLE USAGE:
//
// class MyHandler {
// public:
// MyHandler(const Instance& instance)
// : factory_(this),
// loader_(instance),
// did_open_(false) {
// }
// void ProcessURL(const char* url) {
// CompletionCallback* cc = NewCallback();
// int32_t rv = loader_.Open(MakeRequest(url), cc);
// if (rv != PP_Error_WouldBlock)
// cc->Run(rv);
// }
// private:
// CompletionCallback* NewCallback() {
// return factory_.NewCallback(&MyHandler::DidCompleteIO);
// }
// URLRequestInfo MakeRequest(const char* url) {
// URLRequestInfo request;
// request.SetURL(url);
// request.SetMethod("GET");
// request.SetFollowRedirects(true);
// return request;
// }
// void DidCompleteIO(int32_t result) {
// if (result > 0) {
// // buf_ now contains 'result' number of bytes from the URL.
// ProcessBytes(buf_, result);
// ReadMore();
// } else if (result == PP_OK && !did_open_) {
// // Headers are available, and we can start reading the body.
// did_open_ = true;
// ProcessResponseInfo(loader_.GetResponseInfo());
// ReadMore();
// } else {
// // Done reading (possibly with an error given by 'result').
// }
// }
// void ReadMore() {
// CompletionCallback* cc = NewCallback();
// int32_t rv = fio_.Read(offset_, buf_, sizeof(buf_), cc);
// if (rv != PP_Error_WouldBlock)
// cc->Run(rv);
// }
// void ProcessResponseInfo(const URLResponseInfo& response_info) {
// // Read response headers, etc.
// }
// void ProcessBytes(const char* bytes, int32_t length) {
// // Do work ...
// }
// pp::CompletionCallbackFactory<MyHandler> factory_;
// pp::URLLoader loader_;
// char buf_[4096];
// bool did_open_;
// };
//
class URLLoader_Dev : public Resource {
public:
// Creates an is_null() URLLoader object.
URLLoader_Dev() {}
explicit URLLoader_Dev(PP_Resource resource);
explicit URLLoader_Dev(const Instance& instance);
URLLoader_Dev(const URLLoader_Dev& other);
URLLoader_Dev& operator=(const URLLoader_Dev& other);
void swap(URLLoader_Dev& other);
// PPB_URLLoader methods:
int32_t Open(const URLRequestInfo_Dev& request_info,
const CompletionCallback& cc);
int32_t FollowRedirect(const CompletionCallback& cc);
bool GetUploadProgress(int64_t* bytes_sent,
int64_t* total_bytes_to_be_sent) const;
bool GetDownloadProgress(int64_t* bytes_received,
int64_t* total_bytes_to_be_received) const;
URLResponseInfo_Dev GetResponseInfo() const;
int32_t ReadResponseBody(char* buffer,
int32_t bytes_to_read,
const CompletionCallback& cc);
int32_t FinishStreamingToFile(const CompletionCallback& cc);
void Close();
};
} // namespace pp
#endif // PPAPI_CPP_DEV_URL_LOADER_DEV_H_
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