迅雷下载库的网址：http://thunderplatform.xunlei.com

复制代码 代码如下:
// FileName: Download.h
#pragma once
#include "lib\XLDownload.h"
#include "lib\XLError.h"
#include <vector>

// 下载队列的大小，决定同时开启下载线程的数量
const int LIMIT = 2;

struct Down
{
// 解析出来的下载地址
CString strDownURL;
// 保存的路径
CString strSavePath;
};

struct Flag
{
DWORD dwFlag; // 记录下载线程实时状态
LONG lTaskId; // 记录对应任务ID号
ULONGLONG ullFileSize; // 下载文件大小
ULONGLONG ullRecvSize; // 已下载大小
};

class CDownload
{
private:

// 保存下载的日志信息
std::vector<CString> strLogArr;

// 解析XML文件
//void Analysis (LPCTSTR lpPathXML, LPCTSTR lpBegin, LPCTSTR lpEnd);
void Analysis (LPCTSTR lpPathXML);

// 开始下载
void Start (void);

// 调用迅雷的下载接口
void CreateDownThread (int n);

// 下载任务查询监控线程
static void DownQury (LPVOID ptr);

// 保存日志
void SaveLog (LPCTSTR lpPathAndName);

public:

// 保存解析出来的下载队列
std::vector<Down> strDownArr;

// 记录最新的下载位置
int m_nIndex;

// 下载队列的大小，对应位为1时，该下载位为空，可以启动新的下载线程
struct Flag Flags[LIMIT];

// 总共的下载数
int m_nTotal;

// 失败的下载数
int m_nFail;

// 成功的下载数
int m_nSuccess;

CDownload();
~CDownload();
BOOL DownloadFilesByXML(LPCTSTR lpPahtXML);
};

复制代码 代码如下:
// FileName: Download.cpp
#include "stdafx.h"
#include "Download.h"
#include <Shlwapi.h>
#include <locale.h>
#pragma comment(lib, "lib\\XLDownload.lib")

// 包含XTP界面库头文件
#include "XTToolkitPro.h"

CDownload::CDownload()
{
// 初始化
m_nIndex = 0;

// 初始化为没有下载线程
for (int n=0; n<LIMIT; n++)
{
Flags[n].dwFlag = 1;
Flags[n].lTaskId = n;
}

m_nSuccess = 0;
m_nTotal = 0;
m_nFail = 0;
}

CDownload::~CDownload()
{

}

BOOL CDownload::DownloadFilesByXML(LPCTSTR lpPathXML)
{
DWORD dwRet = XL_SUCCESS;

// 检测XML文件是否存在
if (!PathFileExists(lpPathXML))
{
::MessageBox(NULL, _T("XML文件不存在!"), _T("友情提示"), MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}

// 解析XML文件
Analysis(lpPathXML);

// 统计下载链接数
m_nTotal = strDownArr.size();

// 开始下载
Start();

return TRUE;
}

//void CDownload::Analysis(LPCTSTR lpPathXML, LPCTSTR lpBegin, LPCTSTR lpEnd)
void CDownload::Analysis(LPCTSTR lpPathXML)
{
// 读取XML文件
CXTPPropExchangeXMLNode px(TRUE, NULL, _T("DownLoadInfo"));

if (!px.LoadFromFile(lpPathXML))
{

::MessageBox(NULL, _T("打开XML文件出错!"), _T("友情提示"), MB_OK|MB_ICONEXCLAMATION);
return;
}

if (!px.OnBeforeExchange())
{
::MessageBox(NULL, _T("OnBeforeExchange false!"), _T("友情提示"), MB_OK|MB_ICONEXCLAMATION);
return;
}

px.SetCompactMode(TRUE);

CXTPPropExchangeEnumeratorPtr enumItem(px.GetEnumerator(_T("Item")));
POSITION posItem = enumItem->GetPosition();

CString strLocalName;
Down down;

// 遍历所有的结点
while (posItem)
{
CXTPPropExchangeSection sec(enumItem->GetNext(posItem));

if (sec->IsLoading())
{
PX_String(sec->GetSection(_T("URL")), NULL, down.strDownURL);
PX_String(sec->GetSection(_T("LocalPath")), NULL, down.strSavePath);
PX_String(sec->GetSection(_T("LocalName")), NULL, strLocalName);

down.strSavePath += strLocalName;
// 路径转换
down.strSavePath.Replace('/', '\\');

strDownArr.push_back(down);
}
}
}

// 下载任务查询
void CDownload::DownQury (LPVOID ptr)
{
CDownload* pDown = (CDownload*)ptr;
bool nSign = true;
DWORD dwRst;
TCHAR errorBuf[500];
DWORD dwSize = 500;
CString strLog;

// 如果没有下载完成一直下载
while ((pDown->m_nIndex < (pDown->strDownArr).size()) || nSign)
{
int n = 0;
LONG temp = -1;
nSign = false;

while (n<LIMIT)
{
switch(pDown->Flags[n].dwFlag)
{
// 没有下载，开始新的下载
case 1 :
pDown->CreateDownThread(n);
dwRst = XLQueryTaskInfo(pDown->Flags[n].lTaskId, &temp, &(pDown->Flags[n].ullFileSize), &(pDown->Flags[n].ullRecvSize));

if (dwRst == XL_SUCCESS && pDown->m_nIndex<pDown->strDownArr.size())
{
pDown->strLogArr.push_back(pDown->strDownArr[pDown->m_nIndex].strDownURL);
pDown->strLogArr.push_back(_T("state:suceess"));
pDown->Flags[n].dwFlag = temp;
}
else
{
if (pDown->m_nIndex < pDown->strDownArr.size())
{
pDown->m_nFail += 1;
XLGetErrorMsg(dwRst, errorBuf, dwSize);
pDown->strLogArr.push_back(pDown->strDownArr[pDown->m_nIndex].strDownURL);
strLog.Format(_T("state:%s"), errorBuf);
pDown->strLogArr.push_back(strLog);
}
pDown->m_nIndex += 1;
}
break;

// 成功下载完, 开始新的下载
case 11:
pDown->CreateDownThread(n);
dwRst = XLQueryTaskInfo(pDown->Flags[n].lTaskId, &temp, &(pDown->Flags[n].ullFileSize), &(pDown->Flags[n].ullRecvSize));
if (dwRst == XL_SUCCESS && pDown->m_nIndex<pDown->strDownArr.size())
{
pDown->strLogArr.push_back(pDown->strDownArr[pDown->m_nIndex].strDownURL);
pDown->strLogArr.push_back(_T("state:suceess"));
pDown->Flags[n].dwFlag = temp;
}
else
{
if (pDown->m_nIndex < pDown->strDownArr.size())
{
pDown->m_nFail += 1;
XLGetErrorMsg(dwRst, errorBuf, dwSize);
pDown->strLogArr.push_back(pDown->strDownArr[pDown->m_nIndex].strDownURL);
strLog.Format(_T("state:%s"), errorBuf);
pDown->strLogArr.push_back(strLog);
}
pDown->m_nIndex += 1;
}
break;

// 下载失败，开始新的下载
case 12:
pDown->CreateDownThread(n);
dwRst = XLQueryTaskInfo(pDown->Flags[n].lTaskId, &temp, &(pDown->Flags[n].ullFileSize), &(pDown->Flags[n].ullRecvSize));
if (dwRst == XL_SUCCESS && pDown->m_nIndex<pDown->strDownArr.size())
{
pDown->strLogArr.push_back(pDown->strDownArr[pDown->m_nIndex].strDownURL);
pDown->strLogArr.push_back(_T("state:suceess"));
pDown->Flags[n].dwFlag = temp;
}
else
{
if (pDown->m_nIndex < pDown->strDownArr.size())
{
pDown->m_nFail += 1;
XLGetErrorMsg(dwRst, errorBuf, dwSize);
pDown->strLogArr.push_back(pDown->strDownArr[pDown->m_nIndex].strDownURL);
strLog.Format(_T("state:%s"), errorBuf);
pDown->strLogArr.push_back(strLog);
}
pDown->m_nIndex += 1;
}
break;

// 默认处理
default:
XLQueryTaskInfo(pDown->Flags[n].lTaskId, &temp, &(pDown->Flags[n].ullFileSize), &(pDown->Flags[n].ullRecvSize));
pDown->Flags[n].dwFlag = temp;
if (temp == enumTaskStatus_Download)
{
nSign = true;
}
}
n++;
}
//Sleep(1);
}

// 保存日志
pDown->SaveLog(_T("C:\\down.log"));

CString strTemp;
strTemp.Format(_T("下载完成! 下载总数:%d 成功总数%d 失败总数%d 日志存在位置:C:\\down.log"), pDown->m_nTotal, pDown->m_nSuccess, pDown->m_nFail);
::MessageBox(NULL, strTemp, _T("友情提示"), MB_OK);

pDown->m_nSuccess = 0;
pDown->m_nTotal = 0;
pDown->m_nFail = 0;

// 恢复初始状态
pDown->m_nIndex = 0;

// 恢复为下载队列为空
for (int n=0; n<LIMIT; n++)
{
pDown->Flags[n].dwFlag = 1;
pDown->Flags[n].lTaskId = n;
// 无论是否下载成功，都必须调用XLStopTask
XLStopTask(pDown->Flags[n].lTaskId);
}

//释放资源
XLUninitDownloadEngine();
}

void CDownload::Start (void)
{
int nIndex = 0;

// 1、初始化下载引擎
if ( FALSE == XLInitDownloadEngine() )
{
::MessageBox(NULL, _T("初始化下载引擎失败!"), _T("友情提示"), MB_OK|MB_ICONEXCLAMATION);
return;
}

// 下载任务查询监控线程
::CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE)DownQury, this, 0, NULL);
}

// 调用迅雷的下载接口
void CDownload::CreateDownThread (int n)
{
DWORD dwRst = 0;
if (m_nIndex < strDownArr.size())
{
dwRst = XLURLDownloadToFile(strDownArr[m_nIndex].strSavePath, strDownArr[m_nIndex].strDownURL, NULL, Flags[n].lTaskId);
if (dwRst == XL_SUCCESS)
{
Flags[n].dwFlag = enumTaskStatus_Download;
m_nIndex++;
m_nSuccess++;
}
}
else
{
m_nIndex = strDownArr.size();
}
}

void CDownload::SaveLog (LPCTSTR lpPathAndName)
{
CStdioFile file;
std::vector<CString>::iterator iter;

// 保存现在的语言环境
char * old_locale = _strdup(setlocale(LC_CTYPE,NULL));
// 设置中文环境
setlocale(LC_CTYPE, "chs");

if (file.Open(lpPathAndName, CFile::modeCreate|CFile::modeWrite))
{
for (iter=strLogArr.begin(); iter!=strLogArr.end(); iter++)
{
file.WriteString(*iter);
file.WriteString(_T("\n"));
}
}
file.Close();
// 还原语言区域的设置
setlocale(LC_CTYPE, old_locale);
// 释放内存
free(old_locale);
}