75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#include "HttpDownloader.h"
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#include "Util/File.h"
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#include "Util/MD5.h"
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using namespace toolkit;
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namespace mediakit {
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HttpDownloader::~HttpDownloader() {
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closeFile();
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}
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void HttpDownloader::startDownload(const string &url, const string &file_path, bool append) {
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_file_path = file_path;
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if (_file_path.empty()) {
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_file_path = exeDir() + "HttpDownloader/" + MD5(url).hexdigest();
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}
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_save_file = File::create_file(_file_path.data(), append ? "ab" : "wb");
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if (!_save_file) {
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auto strErr = StrPrinter << "打开文件失败:" << file_path << endl;
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throw std::runtime_error(strErr);
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}
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if (append) {
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auto currentLen = ftell(_save_file);
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if (currentLen) {
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//最少续传一个字节，怕遇到http 416的错误
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currentLen -= 1;
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fseek(_save_file, -1, SEEK_CUR);
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}
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addHeader("Range", StrPrinter << "bytes=" << currentLen << "-" << endl);
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}
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setMethod("GET");
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sendRequest(url);
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}
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void HttpDownloader::onResponseHeader(const string &status, const HttpHeader &headers) {
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if (status != "200" && status != "206") {
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//失败
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throw std::invalid_argument("bad http status: " + status);
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}
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}
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void HttpDownloader::onResponseBody(const char *buf, size_t size) {
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if (_save_file) {
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fwrite(buf, size, 1, _save_file);
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}
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}
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void HttpDownloader::onResponseCompleted(const SockException &ex) {
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closeFile();
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if (_on_result) {
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_on_result(ex, _file_path);
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_on_result = nullptr;
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}
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}
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void HttpDownloader::closeFile() {
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if (_save_file) {
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fflush(_save_file);
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fclose(_save_file);
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_save_file = nullptr;
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}
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}
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} /* namespace mediakit */
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