title: MFC使用POST上传文件 author: Love02xp date: 2019-12-12 01:42:58 category: [编程代码] tags: [代码,VC6]

include <afxinet.h>，关键是要注意http的post协议格式，以及编码（Unicode下需要进行转换）。主要分为以下几个步骤：


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1、 编写数据包的头：

  这里需要注意一个是”Accept: audio/x-wav,text/plain,*/*;….”表示的是希望服务器接收的数据格式；还有就是”Content-Type: multipart/form-data;boundary=\%s”，表示是上传文件，boundary只是划分的分隔符（一般以”``````````````````7b1ac890a1b”的形式存在）；
2、 编写传输的主数据体：

可以理解为将不同的数据通过boundary分割开来，每类数据分别发送。首行的boundary前面需要多加”--”。格式为：

``````````````````--7b1ac890a1b

Content-Disposition:form-data; name=”name”; filename=”filename”

Content-Type: audio/x-wav



....(wav的byte流数据)
3、 编写数据包尾：

数据包结尾最后一个boundary后要多加”--”。格式为：

``````````````````--7b1ac890a1b

Content-Disposition:form-data; name=”Submit”



Submit

``````````````````--7b1ac890a1b--
下面是代码：

    void CCPostDlg::HttpPostFile( CString url, CString file, CString paramName, CString contentType )

    {

         CString boundary = "```````````````````````````1a2b3c4d5e6f";//分隔符，注意：首行必须多"--"，尾部最后必须加"--"，否则识别不出。

         CString boundaryTemplate;

         boundaryTemplate.Format(_T("\r\n--%s\r\n") , boundary);

         byte* boundarybytes = (byte*)boundaryTemplate.GetBuffer(boundaryTemplate.GetLength());



         CInternetSession pSession("ic_PostWav");

         CHttpConnection* pConnect;

         CHttpFile*         pFile;



         CString pServeIP = _T("192.168.10.156");

         INTERNET_PORT wPort = 80;

         CString pObject = _T("/yxbp/index.php");

         pConnect= pSession.GetHttpConnection(pServeIP , wPort);

         pFile= pConnect->OpenRequest(CHttpConnection::HTTP_VERB_POST, pObject

             ,NULL,0,NULL,NULL,INTERNET_FLAG_DONT_CACHE);



         //数据包头

         CString pPostHeader , pPostHeaderTemplate;

         pPostHeaderTemplate= _T("Accept:audio/x-wav,text/html,application/xhtml+xml,application/xml,*/*;q=0.9,*/*;q=0.8\r\n")

             _T("Content-Type: multipart/form-data;boundary=\%s\r\n")

             _T("Connection: keep-alive\r\n");

         pPostHeader.Format(pPostHeaderTemplate, boundary);

         pFile->AddRequestHeaders(pPostHeader);



         //数据帧头

         CString pPostTop , pPostTopTemplate;

         pPostTopTemplate= _T("\%sContent-Disposition:form-data; name=\"%s\"; filename=\"%s\"\r\nContent-Type: \%s\r\n\r\n");

         pPostTop.Format(pPostTopTemplate  , boundaryTemplate,_T("file"), file , contentType);

         byte* pPostTopbytes = (byte*)pPostTop.GetBuffer(pPostTop.GetLength());



         //数据包尾

         CString ender,enderTemplate;

         enderTemplate= _T("\r\n--\%s\r\nContent-Disposition:form-data; name=\"\%s\"\r\n\r\n\%s");

         ender.Format(enderTemplate, boundary , _T("Ender") , _T("ender"));

         ender+= _T("\r\n--");

         ender+= boundary;

         ender+= _T("--\r\n");

         byte* enderbyte = (byte*)ender.GetBuffer(ender.GetLength());



         CFile cfile;

         cfile.Open(file , CFile::modeRead|CFile::shareDenyRead, NULL);



         DWORD dwSize = pPostTop.GetLength() + ender.GetLength() + cfile.GetLength();

         pFile->SendRequestEx(dwSize);

         pFile->Write(pPostTopbytes, pPostTop.GetLength());



         //数据主体

         int bufflength = 4 * 1024;

         byte* buffer = newbyte[bufflength];

         int byteRead = 0;

         while((byteRead = cfile.Read(buffer , bufflength)) != 0)

         {

             pFile->Write(buffer , byteRead);

         }

         cfile.Close();



         //写尾

         pFile->Write(enderbyte, ender.GetLength());

         pFile->EndRequest();



         CString strSentence = "",strGetSentence = "";

         DWORD dwRet ;

         pFile->QueryInfoStatusCode(dwRet);

         if(HTTP_STATUS_OK==dwRet)

         {

             while(pFile->ReadString(strSentence))   // 读取提交数据后的返回结果

             {

                  strGetSentence = strGetSentence+ strSentence ;

              }

         }



         pFile->Close();

         pConnect->Close();

    }




调用：


HttpPostFile("http://127.0.0.1/xxxx/index.php","C:\\temp.wav" , "file","audio/x-wav");