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/*************************************************************************/
/* geturl_handler.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef EXAMPLES_GETURL_GETURL_HANDLER_H_
#define EXAMPLES_GETURL_GETURL_HANDLER_H_
#include "core/ustring.h"
#include "core/vector.h"
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/cpp/url_loader.h"
#include "ppapi/cpp/url_request_info.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/utility/completion_callback_factory.h"
#define READ_BUFFER_SIZE 32768
// GetURLHandler is used to download data from |url|. When download is
// finished or when an error occurs, it posts a message back to the browser
// with the results encoded in the message as a string and self-destroys.
//
// EXAMPLE USAGE:
// GetURLHandler* handler* = GetURLHandler::Create(instance,url);
// handler->Start();
//
class GetURLHandler {
public:
enum Status {
STATUS_NONE,
STATUS_IN_PROGRESS,
STATUS_COMPLETED,
STATUS_ERROR,
};
private:
Status status;
// Callback fo the pp::URLLoader::Open().
// Called by pp::URLLoader when response headers are received or when an
// error occurs (in response to the call of pp::URLLoader::Open()).
// Look at <ppapi/c/ppb_url_loader.h> and
// <ppapi/cpp/url_loader.h> for more information about pp::URLLoader.
void OnOpen(int32_t result);
// Callback fo the pp::URLLoader::ReadResponseBody().
// |result| contains the number of bytes read or an error code.
// Appends data from this->buffer_ to this->url_response_body_.
void OnRead(int32_t result);
// Reads the response body (asynchronously) into this->buffer_.
// OnRead() will be called when bytes are received or when an error occurs.
void ReadBody();
// Append data bytes read from the URL onto the internal buffer. Does
// nothing if |num_bytes| is 0.
void AppendDataBytes(const char* buffer, int32_t num_bytes);
pp::Instance* instance_; // Weak pointer.
String url_; // URL to be downloaded.
pp::URLRequestInfo url_request_;
pp::URLLoader url_loader_; // URLLoader provides an API to download URLs.
char buffer_[READ_BUFFER_SIZE]; // Temporary buffer for reads.
Vector<uint8_t> data; // Contains accumulated downloaded data.
pp::CompletionCallbackFactory<GetURLHandler> cc_factory_;
bool complete;
GetURLHandler(const GetURLHandler&);
void operator=(const GetURLHandler&);
public:
// Creates instance of GetURLHandler on the heap.
// GetURLHandler objects shall be created only on the heap (they
// self-destroy when all data is in).
// Initiates page (URL) download.
void Start();
Status get_status() const;
Vector<uint8_t> get_data() const;
int get_bytes_read() const;
GetURLHandler(pp::Instance* instance_, const String& url);
~GetURLHandler();
};
#endif // EXAMPLES_GETURL_GETURL_HANDLER_H_
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