93 lines
2.0 KiB
C++
93 lines
2.0 KiB
C++
/*
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* HttpDownloader.cpp
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*
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* Created on: 2017年5月5日
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* Author: xzl
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*/
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#include "HttpDownloader.h"
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#include "Util/MD5.h"
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#include "Util/File.h"
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using namespace ZL::Util;
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namespace ZL {
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namespace Http {
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HttpDownloader::HttpDownloader() {
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}
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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& filePath,bool bAppend) {
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_filePath = filePath;
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if(_filePath.empty()){
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_filePath = exeDir() + "/HttpDownloader/" + MD5(url).hexdigest();
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}
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_saveFile = File::createfile_file(_filePath.data(),bAppend ? "ab" : "wb");
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if(!_saveFile){
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auto strErr = StrPrinter << "打开文件失败:" << filePath << endl;
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throw std::runtime_error(strErr);
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}
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if(bAppend){
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auto currentLen = ftell(_saveFile);
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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(_saveFile,-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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shutdown();
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closeFile();
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File::delete_file(_filePath.data());
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if(_onResult){
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auto errMsg = StrPrinter << "Http Status:" << status << endl;
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_onResult(Err_other,errMsg.data(),_filePath.data());
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_onResult = nullptr;
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}
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}
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}
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void HttpDownloader::onResponseBody(const char* buf, size_t size, size_t recvedSize, size_t totalSize) {
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if(_saveFile){
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fwrite(buf,size,1,_saveFile);
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}
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}
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void HttpDownloader::onResponseCompleted() {
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closeFile();
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if(_onResult){
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_onResult(Err_success,"success",_filePath.data());
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_onResult = nullptr;
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}
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}
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void HttpDownloader::onDisconnect(const SockException &ex) {
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closeFile();
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if(_onResult){
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_onResult(ex.getErrCode(),ex.what(),_filePath.data());
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_onResult = nullptr;
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}
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}
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void HttpDownloader::closeFile() {
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if(_saveFile){
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fclose(_saveFile);
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_saveFile = nullptr;
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}
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}
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} /* namespace Http */
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} /* namespace ZL */
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