MFC POST 文件到 http服务器

include ,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:

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”);


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文章标题:MFC POST 文件到 http服务器

文章字数:622

本文作者:零贰

发布时间:2019-12-12, 01:42:58

最后更新:2020-07-16, 11:32:40

原始链接:/html/20191212014258.html

版权声明: "署名-非商用-相同方式共享 4.0" 转载请保留原文链接及作者。

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