MFC开发IM---MFC实现http协议传输图片和文本

要将自己的文件通过http协议进行上传到Web服务器,就必须进行数据封装,也就是加上http协议的包头,数据前加上数据信息描述,协议尾三部分,一边服务端进行解析。在我们本次项目中,我需要控制Ip摄像头进行拍照,将抓取的图片通过Http协议传送到另一个人负责的服务器端。我用的的时MFC,完成控制客户端开发。

首先他给了我他要求的包头,数据描述,结尾符格式,让我按找C++来实现。首先贴出他的Java封装代码:

给的Java格式封装,要求进行C++仿写:

public class SocketHttpRequester {
    /**
     * 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能:
     *   <FORM METHOD=POST ACTION="http://192.168.1.101:8083/upload/servlet/UploadServlet" enctype="multipart/form-data">
            <INPUT TYPE="text" NAME="name">
            <INPUT TYPE="text" NAME="id">
            <input type="file" name="imagefile"/>
            <input type="file" name="zip"/>
         </FORM>
     * @param path 上传路径(注:避免使用localhost或127.0.0.1这样的路径测试,因为它会指向手机模拟器,你可以使用http://www.iteye.cn或http://192.168.1.101:8083这样的路径测试)
     * @param params 请求参数 key为参数名,value为参数值
     * @param file 上传文件
     */
    public static String post(String path, Map<String, String> params, FormFile[] files) throws Exception{     
        final String BOUNDARY = "---------------------------7da2137580612"; //数据分隔线
        final String endline = "--" + BOUNDARY + "--\r\n";//数据结束标志
        
        int fileDataLength = 0;
        if (files!=null||files.length>0) {
        for(FormFile uploadFile : files){//得到文件类型数据的总长度
            StringBuilder fileExplain = new StringBuilder();
             fileExplain.append("--");
             fileExplain.append(BOUNDARY);
             fileExplain.append("\r\n");
             fileExplain.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");
             fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");
             fileExplain.append("\r\n");
             fileDataLength += fileExplain.length();
             
            if(uploadFile.getInStream()!=null){
                fileDataLength += uploadFile.getFile().length();
             }else{
                 fileDataLength += uploadFile.getData().length;
             }
        }
        }
        StringBuilder textEntity = new StringBuilder();
        for (Map.Entry<String, String> entry : params.entrySet()) {//构造文本类型参数的实体数据
            textEntity.append("--");
            textEntity.append(BOUNDARY);
            textEntity.append("\r\n");
            textEntity.append("Content-Disposition: form-data; name=\""+ entry.getKey() + "\"\r\n\r\n");
            textEntity.append(entry.getValue());
            textEntity.append("\r\n");
        }
        //计算传输给服务器的实体数据总长度
        int dataLength = textEntity.toString().getBytes().length + fileDataLength +  endline.getBytes().length;
   
        URL url = new URL(path);
        int port = url.getPort()==-1 ? 80 : url.getPort();
        Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);           
        OutputStream outStream = socket.getOutputStream();
        //下面完成HTTP请求头的发送
        String requestmethod = "POST "+ url.getPath()+" HTTP/1.1\r\n";
        outStream.write(requestmethod.getBytes());
        String accept = "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*\r\n";
        outStream.write(accept.getBytes());
        String language = "Accept-Language: zh-CN\r\n";
        outStream.write(language.getBytes());
        String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "\r\n";
        outStream.write(contenttype.getBytes());
        String contentlength = "Content-Length: "+ dataLength + "\r\n";
        outStream.write(contentlength.getBytes());
        String alive = "Connection: Keep-Alive\r\n";
        outStream.write(alive.getBytes());
        String host = "Host: "+ url.getHost() +":"+ port +"\r\n";
        outStream.write(host.getBytes());
        //写完HTTP请求头后根据HTTP协议再写一个回车换行
        outStream.write("\r\n".getBytes());
        //把所有文本类型的实体数据发送出来
        outStream.write(textEntity.toString().getBytes());           
        //把所有文件类型的实体数据发送出来
        for(FormFile uploadFile : files){
            StringBuilder fileEntity = new StringBuilder();
             fileEntity.append("--");
             fileEntity.append(BOUNDARY);
             fileEntity.append("\r\n");
             fileEntity.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");
             fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");
             outStream.write(fileEntity.toString().getBytes());
             if(uploadFile.getInStream()!=null){
                 byte[] buffer = new byte[1024];
                 int len = 0;
                 while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1){
                     outStream.write(buffer, 0, len);
                 }
                 uploadFile.getInStream().close();
             }else{
                 outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);
             }
             outStream.write("\r\n".getBytes());
        }
        //下面发送数据结束标志,表示数据已经结束
        outStream.write(endline.getBytes());


进行的进行C++格式封装如下:

1.请求包头处理:


CString CHotpimUploadDlg::MakeRequestHeaders(CString &strBoundary)//包头
{
   CString strFormat;
CString strData;
     CString accept = _T("Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*\r\n");
     CString language = _T("Accept-Language: zh-CN\r\n");
     CString contenttype = _T("Content-Type: multipart/form-data; boundary=%s\r\n");//二进制文件传送Content-Type类型为: multipart/form-data
     CString contentlength = _T("Content-Length: %d\r\n");
     CString alive = _T("Connection: Keep-Alive\r\n");
     CString host = _T("Host: 192.168.1.112:8080\r\n");
CString anotherEnter = _T("\r\n");
/* 经过多次尝试发现一开头必须为contenttype,只要这一串字符在开头都可以实现图片上传Web服务器
下面的三种字符排列格式,后两种都可行都是可行的,可根据实际情况添加*/
//strFormat += accept+language+contenttype+contentlength+alive+host+anotherEnter;
//strFormat = contenttype; //这行必须要它标志数据开始,其他包头可根据实际添加
strFormat += contenttype+accept+language+contenttype+contentlength+alive+host+anotherEnter;
//strData.Format(strFormat, strBoundary,m_HeaderStrLen);
strData.Format(strFormat, strBoundary,strBoundary, m_HeaderStrLen);// m_HeaderStrLen = strlen(strPreFileData+endLine);
//strData.Format(strFormat, strBoundary);
    return strData;
}

2.传输数据描述:

CString CHotpimUploadDlg::MakePreFileData(CString &strBoundary, CString &strFileName, int iRecordID)
{
    CString strFormat;
    CString strData;

/* 前面的是需要给服务器的一些参数信息,
包括自定义的时间,参数值,比如我们需要identitynumber,time等,name要与服务器一致 */
strFormat += _T("--%s");
    strFormat += _T("\r\n");
    strFormat += _T("Content-Disposition: form-data; name=\"identitynumber\"");
    strFormat += _T("\r\n\r\n");
strFormat += _T("141040046"); //id值
    strFormat += _T("\r\n");
//
strFormat += _T("--%s");
    strFormat += _T("\r\n");
    strFormat += _T("Content-Disposition: form-data; name=\"time\"");
    strFormat += _T("\r\n\r\n");
strFormat += _T("1433323280446"); //时间值
    strFormat += _T("\r\n");
///////////////////需要传输的图片文件//////////////////////////////////////
strFormat += _T("--%s");
    strFormat += _T("\r\n");
    strFormat += _T("Content-Disposition: form-data;name=\"image\";filename=\"%s\"");
    strFormat += _T("\r\n");
strFormat += _T("Content-Type: application/octet-stream\r\n\r\n");

strData.Format(strFormat, strBoundary, strBoundary, strBoundary, strFileName);
//m_strLen = strlen(strData);
    return strData;
}

3.数据尾部部分:

CString CHotpimUploadDlg::MakePostFileData(CString &strBoundary)
{
    CString strFormat;
    CString strData;
/* 提交完成,根据服务器端实际情况添加,我们的服务器端只需要有结尾标示符就好
strFormat = _T("\r\n");
    strFormat += _T("--%s");
    strFormat += _T("\r\n");
    strFormat += _T("Content-Disposition: form-data; name=\"submitted\"");
    strFormat += _T("\r\n\r\n");
    strFormat += _T("submit");
*/
/* 结尾标示符endLine = "--strBoundary--"  */
    strFormat += _T("\r\n");
    strFormat += _T("--%s--");
    strFormat += _T("\r\n"); 
//strData.Format(strFormat, strBoundary, strBoundary);
strData.Format(strFormat, strBoundary);
    return strData;
}

4.数据发送过程如下:

[cpp]  view plain  copy
  1.   
BOOL CHotpimUploadDlg::SendTrack()//发送数据
{
     CString _mFilePath;
//_mFilePath = "E:\\1.dat";//要传的本地文件地址
//_mFilePath = "E:\\1.pdf";
mFilePath = "E:\\20150602194621.jpg";
     int startp = _mFilePath.ReverseFind('\\');
     int namelen = _mFilePath.GetLength()-startp-1;
   
     CString pcmname = _mFilePath.Mid(startp+1,namelen);
     CString defServerName ="192.168.1.103";//服务器名
     CString defObjectName ="/ShcoolSafer/ArriveMessageAction";//保存的地址
 
 
     // USES_CONVERSION;
     CInternetSession Session;
    CHttpConnection *pHttpConnection = NULL;
     INTERNET_PORT   nPort = 80;
     CFile fTrack;
     CHttpFile* pHTTP;
CString strRequestHeader;
     CString strBoundary ;
     CString strPreFileData ;
     CString strPostFileData ;
     DWORD dwTotalRequestLength;
    DWORD dwChunkLength;
     DWORD dwReadLength;
     DWORD dwResponseLength;
     TCHAR szError[MAX_PATH];
     void* pBuffer = NULL;
     LPSTR szResponse;
     CString strResponse;
     BOOL bSuccess = TRUE;
 
     CString strDebugMessage = _T("");
    
    if (FALSE == fTrack.Open(_mFilePath, CFile::modeRead | CFile::shareDenyWrite))//读出文件 
    {
       AfxMessageBox(_T("Unable to open the file."));
       return FALSE;
    }
 
     int iRecordID = 1;
     strBoundary = _T("---------------------------7da2137580612");//定义边界值
CString endLine = _T("-----------------------------7da2137580612--\r\n");//结尾符
strPreFileData = MakePreFileData(strBoundary, pcmname, iRecordID);
m_HeaderStrLen = strlen(strPreFileData+endLine);
strRequestHeader = MakeRequestHeaders(strBoundary);
     strPostFileData = MakePostFileData(strBoundary);
     dwTotalRequestLength = strPreFileData.GetLength() + strPostFileData.GetLength() + fTrack.GetLength();//计算整个包的总长度
//
dwChunkLength = fTrack.GetLength();
    pBuffer = malloc(dwChunkLength);
 
    if (NULL == pBuffer)
     {
     return FALSE;
    }
 
      try
      {
      pHttpConnection = Session.GetHttpConnection(defServerName,nPort);
       pHTTP = pHttpConnection->OpenRequest(CHttpConnection::HTTP_VERB_POST, defObjectName);
       pHTTP->AddRequestHeaders(strRequestHeader);//发送包头请求
       pHTTP->SendRequestEx(dwTotalRequestLength, HSR_SYNC | HSR_INITIATE);
      
     #ifdef _UNICODE
       pHTTP->Write(W2A(strPreFileData), strPreFileData.GetLength());
     #else
      pHTTP->Write((LPSTR)(LPCSTR)strPreFileData, strPreFileData.GetLength());//写入服务器所需信息
     #endif
      
      dwReadLength = -1;
      while (0 != dwReadLength)
      {
           strDebugMessage.Format(_T("%u / %u\n"), fTrack.GetPosition(), fTrack.GetLength());
           TRACE(strDebugMessage);
           dwReadLength = fTrack.Read(pBuffer, dwChunkLength);//文件内容
           if (0 != dwReadLength)
           {
                pHTTP->Write(pBuffer, dwReadLength);//写入服务器本地文件,用二进制进行传送
           }
      }
      
    #ifdef _UNICODE
       pHTTP->Write(W2A(strPostFileData), strPostFileData.GetLength());
     #else
       pHTTP->Write((LPSTR)(LPCSTR)strPostFileData, strPostFileData.GetLength());
     #endif
      
       pHTTP->EndRequest(HSR_SYNC);
      
      dwResponseLength = pHTTP->GetLength();
      while (0 != dwResponseLength)
      {
        szResponse = (LPSTR)malloc(dwResponseLength + 1);
        szResponse[dwResponseLength] = '\0';
        pHTTP->Read(szResponse, dwResponseLength);
        strResponse += szResponse;
        free(szResponse);
        dwResponseLength = pHTTP->GetLength();
       }
      


      
      } 
      catch (CException* e)
      {
       e->GetErrorMessage(szError, MAX_PATH);
       e->Delete();
       AfxMessageBox(szError);
       bSuccess = FALSE;
      }
 
      pHTTP->Close();
      delete pHTTP;
     
      fTrack.Close();
     
      if (NULL != pBuffer)
      {
      free(pBuffer);
      }
     return bSuccess;
}

5.发送图片时,截取的数据如下(文本显示):



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转载自blog.csdn.net/golddaniu/article/details/79866060