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151 lines
5.6 KiB
C++
151 lines
5.6 KiB
C++
/*************************************************************************/
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/* geturl_handler.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "geturl_handler.h"
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#include "core/os/copymem.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include "ppapi/c/pp_errors.h"
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#include "ppapi/c/ppb_instance.h"
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#include "ppapi/cpp/module.h"
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#include "ppapi/cpp/var.h"
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void GetURLHandler::Start() {
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pp::CompletionCallback cc =
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cc_factory_.NewCallback(&GetURLHandler::OnOpen);
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url_loader_.Open(url_request_, cc);
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}
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void GetURLHandler::OnOpen(int32_t result) {
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if (result != PP_OK) {
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status = STATUS_ERROR;
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return;
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}
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// Here you would process the headers. A real program would want to at least
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// check the HTTP code and potentially cancel the request.
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// pp::URLResponseInfo response = loader_.GetResponseInfo();
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// Start streaming.
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ReadBody();
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}
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void GetURLHandler::AppendDataBytes(const char* buffer, int32_t num_bytes) {
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if (num_bytes <= 0)
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return;
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// Make sure we don't get a buffer overrun.
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num_bytes = std::min(READ_BUFFER_SIZE, num_bytes);
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int ofs = data.size();
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data.resize(ofs + num_bytes);
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copymem(&data[ofs], buffer, num_bytes);
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}
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void GetURLHandler::OnRead(int32_t result) {
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if (result == PP_OK) {
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// Streaming the file is complete.
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status = STATUS_COMPLETED;
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instance_->HandleMessage("package_finished");
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instance_->HandleMessage(0);
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printf("completed!\n");
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} else if (result > 0) {
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// The URLLoader just filled "result" number of bytes into our buffer.
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// Save them and perform another read.
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AppendDataBytes(buffer_, result);
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ReadBody();
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} else {
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// A read error occurred.
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status = STATUS_ERROR;
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ERR_FAIL_COND(result < 0);
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}
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}
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void GetURLHandler::ReadBody() {
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// Note that you specifically want an "optional" callback here. This will
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// allow ReadBody() to return synchronously, ignoring your completion
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// callback, if data is available. For fast connections and large files,
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// reading as fast as we can will make a large performance difference
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// However, in the case of a synchronous return, we need to be sure to run
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// the callback we created since the loader won't do anything with it.
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pp::CompletionCallback cc =
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cc_factory_.NewOptionalCallback(&GetURLHandler::OnRead);
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int32_t result = PP_OK;
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do {
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result = url_loader_.ReadResponseBody(buffer_, sizeof(buffer_), cc);
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// Handle streaming data directly. Note that we *don't* want to call
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// OnRead here, since in the case of result > 0 it will schedule
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// another call to this function. If the network is very fast, we could
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// end up with a deeply recursive stack.
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if (result > 0) {
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AppendDataBytes(buffer_, result);
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}
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} while (result > 0);
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if (result != PP_OK_COMPLETIONPENDING) {
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// Either we reached the end of the stream (result == PP_OK) or there was
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// an error. We want OnRead to get called no matter what to handle
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// that case, whether the error is synchronous or asynchronous. If the
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// result code *is* COMPLETIONPENDING, our callback will be called
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// asynchronously.
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cc.Run(result);
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}
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}
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GetURLHandler::Status GetURLHandler::get_status() const {
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return status;
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};
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Vector<uint8_t> GetURLHandler::get_data() const {
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return data;
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};
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int GetURLHandler::get_bytes_read() const {
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return data.size();
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};
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GetURLHandler::GetURLHandler(pp::Instance* instance,
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const String& url)
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: instance_(instance),
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url_(url),
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url_request_(instance),
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url_loader_(instance),
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cc_factory_(this) {
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url_request_.SetURL(std::string(url.utf8().get_data()));
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url_request_.SetMethod("GET");
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status = STATUS_NONE;
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printf("url handler for url %ls!\n", url.c_str());
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}
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GetURLHandler::~GetURLHandler() {
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}
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