通过HTTP实现文件上传，有三种方式，分别是：WinInet、WinHttp、CURL模拟表单上传文件。
一、WinInet版本：
#include "stdafx.h"
#include <stdio.h>
#include <windows.h>
#include <winsock2.h>
#include <wininet.h>
#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "wininet.lib")
namespace
{
LPCTSTR boundary = TEXT("-----------------------------1234567890123"); //随机字符串
LPCSTR aboundary = "-----------------------------1234567890123";
}
//
BOOL DoUploadFile(char *pszFilePath, char *pszFileName)
{
HINTERNET hSession = InternetOpen("HttpSendRequest",
INTERNET_OPEN_TYPE_PRECONFIG,
NULL,
NULL,
0); //同步方式
if(!hSession)
{
printf("Failed to open InternetOpen\n");
return -1;
}
//连接到一个http服务:
HINTERNET hConnect = InternetConnect(hSession,
"127.0.0.1",
8899/*INTERNET_DEFAULT_HTTP_PORT*/, //连接到80端口
NULL,
NULL,
INTERNET_SERVICE_HTTP, //服务类型HTTP，FTP或Gopher
0,
1);
if(!hConnect)
{
printf("error InternetConnect\n");
return -1;
}
//上传文件
HINTERNET hRequest = HttpOpenRequest(hConnect,
"POST",
"/CRMFiles/"/*远程文件夹名字*/,
HTTP_VERSION/*NULL*/,
NULL,
NULL,
INTERNET_FLAG_KEEP_CONNECTION/*INTERNET_FLAG_NO_CACHE_WRITE*/,
0);
if (!hRequest)
{
printf("Failed to open request handle: %lu\n", GetLastError ());
return FALSE;
}
//打开指定的文件:
HANDLE hFile = CreateFile(pszFilePath,
GENERIC_READ,
FILE_SHARE_READ|FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (hFile == INVALID_HANDLE_VALUE)
{
printf("\nFailed to open local file %s.", pszFilePath);
return FALSE;
}
DWORD dwFileSize = GetFileSize(hFile, 0);
printf ("File size is %d\n", dwFileSize );
TCHAR content_type[128] = {0};
_stprintf_s(content_type, TEXT("Content-Type: multipart/form-data; boundary=%s"), boundary);
LPTSTR referer = TEXT("Referer: http://127.0.0.1/CRMFiles");
LPTSTR accept = TEXT("Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
LPTSTR accept_lan = TEXT("Accept-Language: zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3");
LPTSTR accept_encoding = TEXT("Accept-Encoding: gzip, deflate");
LPTSTR user_agent = TEXT("User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0");
HttpAddRequestHeaders(hRequest, content_type, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
HttpAddRequestHeaders(hRequest, referer, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
HttpAddRequestHeaders(hRequest, accept, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
HttpAddRequestHeaders(hRequest, accept_lan, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
HttpAddRequestHeaders(hRequest, accept_encoding, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
char first_boundary[128] = {0};
char delimiter[128] = {0};
char end_boundary[128] = {0};
sprintf_s(first_boundary, "--%s\r\n", aboundary);
sprintf_s(delimiter, "\r\n--%s\r\n", aboundary);
sprintf_s(end_boundary, "\r\n--%s--\r\n", aboundary);
char content_dispos[128] = {0};
if (strlen(pszFileName) > 0){
_stprintf_s(content_dispos, "Content-Disposition: form-data; name=\"fileupload\"; filename=\"%s\"\r\n", pszFileName);
}
//LPSTR content_dispos = "Content-Disposition: form-data; name=\"fileupload\"; filename=\"123.jpg\"\r\n";
LPSTR content_type2 = "Content-Type: application/octet-stream\r\n\r\n";
LPSTR rn = "\r\n";
//
INTERNET_BUFFERS BufferIn = {0};
BufferIn.dwStructSize = sizeof( INTERNET_BUFFERS );
BufferIn.Next = NULL;
BufferIn.lpcszHeader = NULL;
BufferIn.dwHeadersLength = 0;
BufferIn.dwHeadersTotal = 0;
BufferIn.lpvBuffer = NULL;
BufferIn.dwBufferLength = 0;
BufferIn.dwBufferTotal = dwFileSize
+strlen(first_boundary)
+strlen(content_dispos)
+strlen(content_type2)
+strlen(end_boundary); //Content-Length:
BufferIn.dwOffsetLow = 0;
BufferIn.dwOffsetHigh = 0;
if(!HttpSendRequestEx( hRequest, &BufferIn, NULL, 0/*HSR_INITIATE*/, 0))
{
InternetCloseHandle(hRequest);
InternetCloseHandle(hConnect);
InternetCloseHandle(hSession);
printf( "Error on HttpSendRequestEx %lu\n", GetLastError() );
return FALSE;
}
DWORD dwWrittenBytes = 0;
InternetWriteFile(hRequest, (byte*)first_boundary, strlen(first_boundary), &dwWrittenBytes); //first boundary
InternetWriteFile(hRequest, (byte*)content_dispos, strlen(content_dispos), &dwWrittenBytes);
InternetWriteFile(hRequest, (byte*)content_type2, strlen(content_type2), &dwWrittenBytes);
//BYTE *lpBuffer = (BYTE*)VirtualAlloc(0, dwFileSize, MEM_COMMIT, PAGE_READWRITE);
DWORD sum = 0;
DWORD dwBytesRead = 0;
DWORD dwBytesWritten = 0;
BYTE pBuffer[5120] = {0}; // 按照5kb读取文件(栈的大小为1M,超过1M将提示溢出)
BOOL bRead, bRet;
do
{
if (!(bRead = ReadFile (hFile, pBuffer, sizeof(pBuffer), &dwBytesRead, NULL)))
{
printf ("\nReadFile failed on buffer %lu.",GetLastError());
break;
}
if (!(bRet=InternetWriteFile( hRequest, pBuffer, dwBytesRead, &dwBytesWritten)))
{
printf ("\nInternetWriteFile failed %lu", GetLastError());
break;
}
sum += dwBytesWritten;
}while (dwBytesRead == sizeof(pBuffer));
//
CloseHandle(hFile);
//last boundary
InternetWriteFile(hRequest, (byte*)end_boundary, strlen(end_boundary), &dwWrittenBytes);
printf ("Actual written bytes: %d\nupload %s successed!\n", sum, pszFileName);
//结束一个HTTP请求:
if(!HttpEndRequest(hRequest, NULL, 0, 0))
{
printf( "Error on HttpEndRequest %lu \n", GetLastError());
return FALSE;
}
InternetCloseHandle(hRequest);
InternetCloseHandle(hConnect);
InternetCloseHandle(hSession);
//VirtualFree(lpBuffer, 0, MEM_RELEASE);
return TRUE;
}
//
int main(int argc, char **argv)
{
BOOL bOkey = DoUploadFile("d:\\test.jpg", "test123.jpg");
if(!bOkey)
{
printf("error DoUploadFile\n");
}
system("pause");
return 0;
}
二、winhttp版本
待发布~~~~
三、libcurl版本
通过模拟表单上传文件到服务端，代码部分：
#include "stdafx.h"
#include <iostream>
#include <string.h>
#include <assert.h>
#include "curl.h"
using namespace std;
/**
* @brief 回调函数,得到响应内容
*/
int write_data(void* buffer, int size, int nmemb, void* userp)
{
std::string * str = dynamic_cast<std::string *>((std::string *)userp);
str->append((char *)buffer, size * nmemb);
return nmemb;
}
/**
* @brief upload
*/
bool upload(string url, string filePath, string fileName, string &response, long &statusCode)
{
CURL *curl = curl_easy_init();
struct curl_httppost* post = NULL;
struct curl_httppost* last = NULL;
if (curl)
{
//指定url
curl_easy_setopt(curl, CURLOPT_URL, (char *)url.c_str());
/* Fill in the file upload field */
/*curl_formadd(&post,
&last,
CURLFORM_COPYNAME, "file",
CURLFORM_FILE, "d:\\beyond.mp3",
CURLFORM_END);*/
CURLFORMcode formCode = CURL_FORMADD_OK;
formCode = curl_formadd(&post,
&last,
CURLFORM_PTRNAME, "file",
CURLFORM_FILE, (char*)filePath.c_str(),
CURLFORM_FILENAME, (char*)fileName.c_str(),
CURLFORM_END);// form-data key(file) "filePath"为文件路径,"fileName"为文件上传时文件名
/* Fill in the filename field */
/*curl_formadd(&post,
&last,
CURLFORM_COPYNAME, "name",
CURLFORM_COPYCONTENTS, "EasyCurl.h",
CURLFORM_END);*/
/* Fill in the submit field too, even if this is rarely needed */
curl_formadd(&post,
&last,
CURLFORM_COPYNAME, "submit",
CURLFORM_COPYCONTENTS, "submit",
CURLFORM_END);
//构造post参数
curl_easy_setopt(curl, CURLOPT_HTTPPOST, post);
//绑定相应
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
//绑定响应内容的地址
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)(&response));
//支持重定向(HFS作为文件服务端,不加这句代码,状态码返回的是301)
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
//执行请求
CURLcode ret = curl_easy_perform(curl);
//获取返回信息
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &statusCode);
//
curl_easy_cleanup(curl);
return (ret == CURLE_OK);
}
else
{
return false;
}
}
//
int _tmain(int argc, _TCHAR* argv[])
{
std::string response;
long statuscode = 0;
int code = upload("http://127.0.0.1:7879/CRMFiles", "d:\\error.wav", "_123.mp3", response, statuscode);
cout << "code : "<< code << endl;
cout << "status_code : "<< statuscode << endl;
cout << "response : "<< response.c_str() << endl;
getchar();
return 0;
}
关于分片上传（multipart/form-data）的一些资料：
tips：搭建服务端可以使用hfs，很好用的一款免费软件！
