HTTP包不发送

Question

我为MAC OS X Mavericks编写我的应用程序。它必须是应用程序，它可以向服务器发送POST和GET请求。首先，我尝试发送POST请求。但不幸的是，它不起作用，我不知道为什么。当我尝试用嗅探器WireShark捕获包时，它显示没有包发送。这是我的代码：

UInt32 Login(wchar_t* wstrIpAddress) 
{ 
    size_t size = wstrIpAddress.length(); 

    //create request body 
    CFStringRef bodyString = CFSTR(""); 
    CFDataRef bodyData = CFStringCreateExternalRepresentation(kCFAllocatorDefault, 
                 bodyString, 
                 kCFStringEncodingUTF8, 
                 0); 
    if(bodyData == NULL) 
    { 
     cout << "CFStringCreateExternalRepresentation() could not convert the characters to the specified encoding. " 
     "Error code: " 
     << errno << endl; 
     return 2; 
    } 

    //create headers 
    CFStringRef headerFieldName = CFSTR("Content-Type"); 
    CFStringRef headerFieldValue = CFSTR("application/x-www-form-urlencoded;charset=base64"); 

    //fix coding wstrIpAddress from wstring to UInt8 
    CFStringEncoding encoding = 
    (CFByteOrderLittleEndian == CFByteOrderGetCurrent()) ? kCFStringEncodingUTF32LE : kCFStringEncodingUTF32BE; 

    CFIndex wstrIpAddressLen = (wcslen(wstrIpAddress.c_str())) * sizeof(wchar_t); 

    CFStringRef myUrl = CFStringCreateWithBytes(kCFAllocatorDefault, 
             (UInt8*)wstrIpAddress.c_str(), 
             wstrIpAddressLen, 
             encoding, 
             false); 
    if(myUrl == NULL) 
    { 
     cout << "CFStringCreateWithBytes() had a problem with creating the object. Error code: " << errno << endl; 
     return 3; 
    } 

    //CFStringRef urlEscaped = CFURLCreateStringByAddingPercentEscapes(NULL, myUrl, NULL, NULL, kCFStringEncodingUTF8); 

    CFURLRef url = CFURLCreateWithString(kCFAllocatorDefault, myUrl, 0); 
    if(url == NULL) 
    { 
     cout << "CFURLCreateWithString() had a problem with creating the object. Error code: " << errno << endl; 
     return 4; 
    } 

    CFStringRef requestMethod = CFSTR("POST"); 
    CFHTTPMessageRef myRequest = CFHTTPMessageCreateRequest(kCFAllocatorDefault, requestMethod, url, kCFHTTPVersion1_1); 
    if(myRequest == NULL) 
    { 
     cout << "CFHTTPMessageCreateRequest() had a problem with creating the object. Error code: " << errno << endl; 
     return 5; 
    } 

    CFDataRef bodyDataExt = CFStringCreateExternalRepresentation(kCFAllocatorDefault, 
                 bodyString, 
                 kCFStringEncodingUTF8, 
                 0); 
    if(bodyDataExt == NULL) 
    { 
     cout << "CFStringCreateExternalRepresentation() could not convert the characters to the specified encoding. " 
     "Error code: " 
     << errno << endl; 
     return 6; 
    } 

    CFHTTPMessageSetBody(myRequest, bodyDataExt); 
    CFHTTPMessageSetHeaderFieldValue(myRequest, headerFieldName, headerFieldValue); 
    CFReadStreamRef myReadStream = CFReadStreamCreateForHTTPRequest(kCFAllocatorDefault, myRequest); 
    //CFErrorRef copyError = CFReadStreamCopyError(myReadStream); 
    //cout << copyError << endl; 
    CFRelease(myRequest); 
    myRequest = NULL; 

    //you could release the CFHTTP request object immediately after calling CFReadStreamCreateForHTTPRequest 
    //Because the read stream opens a socket connection with the server specified by the myUrl parameter when the CFHTTP request was created, some 
    //amount of time must be allowed to pass before the stream is considered to be open 

    //Opening the read stream also causes the request to be serialized and sent 
    Boolean bRes = CFReadStreamOpen(myReadStream); 
    if(bRes == FALSE) 
    { 
     CFStreamError myErr = CFReadStreamGetError(myReadStream); 
     // An error has occurred. 
     if (myErr.domain == kCFStreamErrorDomainPOSIX) { 
     // Interpret myErr.error as a UNIX errno. 
     } 
     else if (myErr.domain == kCFStreamErrorDomainMacOSStatus) { 
     // Interpret myErr.error as a MacOS error code. 
     OSStatus macError = (OSStatus)myErr.error; 
     // Check other error domains. 
     } 
     cout << "ReadStreamOpen error with error code: " << errno << endl;; 
     return 7; 
    } 
    //UInt32 myErrCode = CFHTTPMessageGetResponseStatusCode(myReadStream); 
    /*if(myErrCode != 200) 
    { 
     cout << "Request faild\n" << endl; 
     return 1; 
    }*/ 

    //release the message objects 
    CFRelease(url); 
    CFRelease(bodyString); 
    CFRelease(bodyData); 
    CFRelease(headerFieldName); 
    CFRelease(headerFieldValue); 
    CFRelease(bodyDataExt); 
    bodyDataExt = NULL; 
    return 0; 
} 

Answer 1

我找到了答案。

1. 地址的服务器，例如，必须是这样的格式： http://10.0.0.25，但不只能使用IP这样的 - > 10.0.0.25。

2. 我们还必须从响应中检查状态码，以确保正确的连接。

   UInt32 myErrCode = CFHTTPMessageGetResponseStatusCode(myReadStream); 
   if(myErrCode != 200) 
   { 
       cout << "Request faild\n" << endl; 
       return 1; 
   }