WinHttp 类封装「建议收藏」

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头文件

#pragma once
#include <Windows.h>
#include <stdio.h>
#include <string>
using std::string;
using std::wstring;


bool libHttp_Get(wstring wszServerName,WORD nServerPort, wstring wszObjectName, string &result);

bool libHttp_Post(wstring wszServerName,WORD nServerPort, wstring wszObjectName,string &postData, string &result);

bool libHttp_DownloadFile(const wchar_t *wszURL, const wchar_t *wszFileSavePath);

源文件

#include "StdAfx.h"
#include "libHttp.h"
#include <iostream>
#include <windows.h>
#include <winhttp.h> 
#pragma comment(lib,"winhttp.lib")
bool libHttp_Get(wstring wszServerName,WORD nServerPort, wstring wszObjectName, string &result)
{ 

HINTERNET  hSession = NULL;
HINTERNET  hConnect = NULL;
HINTERNET  hRequest = NULL;
BOOL  bResults = FALSE;
hSession = WinHttpOpen(L"Mozilla/5.0 (Windows NT 6.1; WOW64) Chrome/45.0.2454.101",
WINHTTP_ACCESS_TYPE_NO_PROXY,
NULL,
NULL,
0);
hConnect = WinHttpConnect(hSession, wszServerName.c_str(), nServerPort, 0);	// WINHTTP_FLAG_ASYNC 指示WinHTTP API将异步执行
hRequest = WinHttpOpenRequest(hConnect, L"GET", wszObjectName.c_str(), L"HTTP/1.1", WINHTTP_NO_REFERER,WINHTTP_DEFAULT_ACCEPT_TYPES, 0);
bResults = WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0 );
bResults = WinHttpReceiveResponse(hRequest, NULL);
if(!bResults)
{ 

if (hRequest) WinHttpCloseHandle(hRequest);
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) WinHttpCloseHandle(hSession);
return false;
}
DWORD dwNumberOfBytesToRead = 0;
DWORD dwNumberOfBytesRead = 0;;
do 
{ 

dwNumberOfBytesToRead = 0;
WinHttpQueryDataAvailable(hRequest, &dwNumberOfBytesToRead);
if(dwNumberOfBytesToRead <= 0) break;
char *pbufRecv = new char[dwNumberOfBytesToRead + 1];
ZeroMemory(pbufRecv, dwNumberOfBytesToRead + 1);
WinHttpReadData( hRequest, (LPVOID)pbufRecv, dwNumberOfBytesToRead, &dwNumberOfBytesRead);
result += string(pbufRecv);
delete [] pbufRecv;
pbufRecv = NULL;
} while (dwNumberOfBytesToRead > 0);
if (hRequest) WinHttpCloseHandle(hRequest);
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) WinHttpCloseHandle(hSession);
return true;
}
bool libHttp_Post(wstring wszServerName,WORD nServerPort, wstring wszObjectName,string &postData, string &result)
{ 

HINTERNET  hSession = NULL;
HINTERNET  hConnect = NULL;
HINTERNET  hRequest = NULL;
BOOL  bResults = FALSE;
hSession = WinHttpOpen(L"Mozilla/5.0 (Windows NT 6.1; WOW64) Chrome/45.0.2454.101",
WINHTTP_ACCESS_TYPE_NO_PROXY,
NULL,
NULL,
0);
hConnect = WinHttpConnect(hSession, wszServerName.c_str(), nServerPort, 0);	// WINHTTP_FLAG_ASYNC 指示WinHTTP API将异步执行
hRequest = WinHttpOpenRequest(hConnect, L"POST", wszObjectName.c_str(), L"HTTP/1.1", WINHTTP_NO_REFERER,WINHTTP_DEFAULT_ACCEPT_TYPES, 0);
//bResults = WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0 );
bResults = WinHttpSendRequest(hRequest, 0, 0, (void*)(postData.c_str()), postData.length(), postData.length(), 0);
bResults = WinHttpReceiveResponse(hRequest, NULL);
if(!bResults)
{ 

if (hRequest) WinHttpCloseHandle(hRequest);
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) WinHttpCloseHandle(hSession);
return false;
}
DWORD dwNumberOfBytesToRead = 0;
DWORD dwNumberOfBytesRead = 0;;
do 
{ 

dwNumberOfBytesToRead = 0;
WinHttpQueryDataAvailable(hRequest, &dwNumberOfBytesToRead);
if(dwNumberOfBytesToRead <= 0) break;
char *pbufRecv = new char[dwNumberOfBytesToRead + 1];
ZeroMemory(pbufRecv, dwNumberOfBytesToRead + 1);
WinHttpReadData( hRequest, (LPVOID)pbufRecv, dwNumberOfBytesToRead, &dwNumberOfBytesRead);
result += string(pbufRecv);
delete [] pbufRecv;
pbufRecv = NULL;
} while (dwNumberOfBytesToRead > 0);
if (hRequest) WinHttpCloseHandle(hRequest);
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) WinHttpCloseHandle(hSession);
return true;
}
typedef struct _URL_INFO
{ 

WCHAR szScheme[512];
WCHAR szHostName[512];
WCHAR szUserName[512];
WCHAR szPassword[512];
WCHAR szUrlPath[512];
WCHAR szExtraInfo[512];
}URL_INFO, *PURL_INFO;
bool libHttp_DownloadFile(const wchar_t *wszURL, const wchar_t *wszFileSavePath)
{ 

URL_INFO url_info = { 
 0 };
URL_COMPONENTSW lpUrlComponents = { 
 0 };
lpUrlComponents.dwStructSize = sizeof(lpUrlComponents);
lpUrlComponents.lpszExtraInfo = url_info.szExtraInfo;
lpUrlComponents.lpszHostName = url_info.szHostName;
lpUrlComponents.lpszPassword = url_info.szPassword;
lpUrlComponents.lpszScheme = url_info.szScheme;
lpUrlComponents.lpszUrlPath = url_info.szUrlPath;
lpUrlComponents.lpszUserName = url_info.szUserName;
lpUrlComponents.dwExtraInfoLength = 
lpUrlComponents.dwHostNameLength = 
lpUrlComponents.dwPasswordLength = 
lpUrlComponents.dwSchemeLength = 
lpUrlComponents.dwUrlPathLength = 
lpUrlComponents.dwUserNameLength = 512;
WinHttpCrackUrl(wszURL, 0, ICU_ESCAPE, &lpUrlComponents);
HINTERNET hSession = WinHttpOpen(NULL, WINHTTP_ACCESS_TYPE_NO_PROXY, NULL, NULL, 0);
DWORD dwReadBytes, dwSizeDW = sizeof(dwSizeDW), dwContentSize, dwIndex = 0;
HINTERNET hConnect = WinHttpConnect(hSession, lpUrlComponents.lpszHostName, lpUrlComponents.nPort, 0);
HINTERNET hRequest = WinHttpOpenRequest(hConnect, L"HEAD", lpUrlComponents.lpszUrlPath, L"HTTP/1.1", WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, WINHTTP_FLAG_REFRESH);
WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0);
WinHttpReceiveResponse(hRequest, 0);
WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_CONTENT_LENGTH | WINHTTP_QUERY_FLAG_NUMBER, NULL, &dwContentSize, &dwSizeDW, &dwIndex);
WinHttpCloseHandle(hRequest);
// 创建一个请求，获取数据
hRequest = WinHttpOpenRequest(hConnect, L"GET", lpUrlComponents.lpszUrlPath, L"HTTP/1.1", WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, WINHTTP_FLAG_REFRESH);
WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0);
WinHttpReceiveResponse(hRequest, 0);
// 分段回调显示进度
DWORD BUF_LEN = 1024, ReadedLen = 0;
BYTE *pBuffer = NULL;
pBuffer = new BYTE[BUF_LEN];
bool bRet = false;
HANDLE hFile = CreateFileW(wszFileSavePath, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
while (dwContentSize > ReadedLen)
{ 

ZeroMemory(pBuffer, BUF_LEN);
WinHttpReadData(hRequest, pBuffer, BUF_LEN, &dwReadBytes);
ReadedLen += dwReadBytes;
WriteFile(hFile, pBuffer, dwReadBytes, &dwReadBytes, NULL);
bRet = true;
}
CloseHandle(hFile);
delete pBuffer;
WinHttpCloseHandle(hRequest);
WinHttpCloseHandle(hConnect);
WinHttpCloseHandle(hSession);
return bRet;
}