Windows MFC HTTP GET请求 函数流程

  1 CString m_strHttpUrl(_T("http://10.200.80.86:8090/course/upload"))
  2 CInternetSession * pInternetSession = NULL;
  3 CHttpConnection * pHttpConnection = NULL;
  4 CHttpFile * pHttpFile = NULL;
  5 
  6 
  7 //建立连接
  8 pInternetSession = new CInternetSession(AfxGetAppName());
  9 
 10 
 11 CString strServer;
 12 CString strObject;
 13 DWORD dwServiceType;
 14 INTERNET_PORT nPort;
 15 AfxParseURL(m_strHttpUrl, dwServiceType, strServer, strObject, nPort);
 16 
 17 
 18 try
 19 {
 20     pHttpConnection = pInternetSession->GetHttpConnection(strServer, nPort);
 21 }
 22 catch (CInternetException* e)
 23 {
 24     CString strError;
 25     strError.Format(_T("GetHttpConnection Error: %u, Context: %u"), e->m_dwError, e->m_dwContext);
 26     AfxMessageBox(strError);
 27 
 28     if (NULL != pHttpConnection)
 29     {
 30         pHttpConnection->Close();
 31         delete pHttpConnection;
 32         pHttpConnection = NULL;
 33     }
 34     if (NULL != pInternetSession)
 35     {
 36         pInternetSession->Close();
 37         delete pInternetSession;
 38         pInternetSession = NULL;
 39     }
 40 
 41     return FALSE;
 42 }
 43 
 44 
 45 strParam.Format(_T("?ccvid=%s&filename=%s&filesize=%u&first=1&format=%s&md5=%s&servicetype=%s&uid=%s&time=%I64u"),
 46     m_strVideoid, m_strVideoName, m_fileLen, g_strFormat, m_strFileMD5, m_strServicetype, m_strUserid, currentTime);
 47 strParam.AppendFormat(_T("&hash=%s"), sHash.c_str());
 48 
 49 CString strTempObject = strObject + strParam;
 50 pHttpFile = pHttpConnection->OpenRequest(CHttpConnection::HTTP_VERB_GET, strTempObject);
 51 if (NULL == pHttpFile)
 52 {
 53     AfxMessageBox(_T("OpenRequest Error."));
 54 
 55     if (NULL != pHttpFile)
 56     {
 57         pHttpFile->Close();
 58         delete pHttpFile;
 59         pHttpFile = NULL;
 60     }
 61     if (NULL != pHttpConnection)
 62     {
 63         pHttpConnection->Close();
 64         delete pHttpConnection;
 65         pHttpConnection = NULL;
 66     }
 67     if (NULL != pInternetSession)
 68     {
 69         pInternetSession->Close();
 70         delete pInternetSession;
 71         pInternetSession = NULL;
 72     }
 73 
 74     return FALSE;
 75 }
 76 
 77     
 78 pHttpFile->AddRequestHeaders(_T("Content-Type: application/x-www-form-urlencoded; charset=utf-8"));
 79 
 80 
 81 try
 82 {
 83     pHttpFile->SendRequest();
 84 }
 85 catch (CInternetException* e)
 86 {
 87     CString strError;
 88     strError.Format(_T("SendRequest Error: %u, Context: %u"), e->m_dwError, e->m_dwContext);
 89     AfxMessageBox(strError);
 90 
 91     if (NULL != pHttpFile)
 92     {
 93         pHttpFile->Close();
 94         delete pHttpFile;
 95         pHttpFile = NULL;
 96     }
 97     if (NULL != pHttpConnection)
 98     {
 99         pHttpConnection->Close();
100         delete pHttpConnection;
101         pHttpConnection = NULL;
102     }
103     if (NULL != pInternetSession)
104     {
105         pInternetSession->Close();
106         delete pInternetSession;
107         pInternetSession = NULL;
108     }
109 
110     return FALSE;
111 }
112 
113 
114 char szChars[1024 + 1] = { 0 };
115 CString strRawResponse;
116 UINT nReaded = 0;
117 while ((nReaded = pHttpFile->Read((void*)szChars, 1024)) > 0)
118 {
119     szChars[nReaded] = ‘\0‘;
120     strRawResponse += szChars;
121     memset(szChars, 0, 1024 + 1);
122 }
123 
124 AfxMessageBox(strRawResponse);
125 
126 
127 if (NULL != pHttpFile)
128 {
129     pHttpFile->Close();
130     delete pHttpFile;
131     pHttpFile = NULL;
132 }
133 if (NULL != pHttpConnection)
134 {
135     pHttpConnection->Close();
136     delete pHttpConnection;
137     pHttpConnection = NULL;
138 }
139 if (NULL != pInternetSession)
140 {
141     pInternetSession->Close();
142     delete pInternetSession;
143     pInternetSession = NULL;
144 }
145 
146 return TRUE;