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/*************************************************************************/
/* geturl_handler.cpp */
/*************************************************************************/
/* 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. */
/*************************************************************************/
#include "geturl_handler.h"
#include "core/os/copymem.h"
#include <stdio.h>
#include <stdlib.h>
#include "ppapi/c/pp_errors.h"
#include "ppapi/c/ppb_instance.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/var.h"
void GetURLHandler::Start() {
pp::CompletionCallback cc =
cc_factory_.NewCallback(&GetURLHandler::OnOpen);
url_loader_.Open(url_request_, cc);
}
void GetURLHandler::OnOpen(int32_t result) {
if (result != PP_OK) {
status = STATUS_ERROR;
return;
}
// Here you would process the headers. A real program would want to at least
// check the HTTP code and potentially cancel the request.
// pp::URLResponseInfo response = loader_.GetResponseInfo();
// Start streaming.
ReadBody();
}
void GetURLHandler::AppendDataBytes(const char* buffer, int32_t num_bytes) {
if (num_bytes <= 0)
return;
// Make sure we don't get a buffer overrun.
num_bytes = std::min(READ_BUFFER_SIZE, num_bytes);
int ofs = data.size();
data.resize(ofs + num_bytes);
copymem(&data[ofs], buffer, num_bytes);
}
void GetURLHandler::OnRead(int32_t result) {
if (result == PP_OK) {
// Streaming the file is complete.
status = STATUS_COMPLETED;
instance_->HandleMessage("package_finished");
instance_->HandleMessage(0);
printf("completed!\n");
} else if (result > 0) {
// The URLLoader just filled "result" number of bytes into our buffer.
// Save them and perform another read.
AppendDataBytes(buffer_, result);
ReadBody();
} else {
// A read error occurred.
status = STATUS_ERROR;
ERR_FAIL_COND(result < 0);
}
}
void GetURLHandler::ReadBody() {
// Note that you specifically want an "optional" callback here. This will
// allow ReadBody() to return synchronously, ignoring your completion
// callback, if data is available. For fast connections and large files,
// reading as fast as we can will make a large performance difference
// However, in the case of a synchronous return, we need to be sure to run
// the callback we created since the loader won't do anything with it.
pp::CompletionCallback cc =
cc_factory_.NewOptionalCallback(&GetURLHandler::OnRead);
int32_t result = PP_OK;
do {
result = url_loader_.ReadResponseBody(buffer_, sizeof(buffer_), cc);
// Handle streaming data directly. Note that we *don't* want to call
// OnRead here, since in the case of result > 0 it will schedule
// another call to this function. If the network is very fast, we could
// end up with a deeply recursive stack.
if (result > 0) {
AppendDataBytes(buffer_, result);
}
} while (result > 0);
if (result != PP_OK_COMPLETIONPENDING) {
// Either we reached the end of the stream (result == PP_OK) or there was
// an error. We want OnRead to get called no matter what to handle
// that case, whether the error is synchronous or asynchronous. If the
// result code *is* COMPLETIONPENDING, our callback will be called
// asynchronously.
cc.Run(result);
}
}
GetURLHandler::Status GetURLHandler::get_status() const {
return status;
};
Vector<uint8_t> GetURLHandler::get_data() const {
return data;
};
int GetURLHandler::get_bytes_read() const {
return data.size();
};
GetURLHandler::GetURLHandler(pp::Instance* instance,
const String& url)
: instance_(instance),
url_(url),
url_request_(instance),
url_loader_(instance),
cc_factory_(this) {
url_request_.SetURL(std::string(url.utf8().get_data()));
url_request_.SetMethod("GET");
status = STATUS_NONE;
printf("url handler for url %ls!\n", url.c_str());
}
GetURLHandler::~GetURLHandler() {
}
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