为什么httpopenrequest会因错误122而失败?

一般来说,URL的大小应该小于或等于2K。因为您正在执行一个日志,所以您朝着正确的方向前进,对于大部分数据,您希望将其作为HTTP请求的主体传递,如本例中所示:

POST /login.jsp HTTP/1.1
Host: www.mysite.com
User-Agent: Mozilla/4.0
Content-Length: 27
Content-Type: application/x-www-form-urlencoded

userid=joe&password=guessme <--You need to do this!

从这里开始: http://developers.sun.com/mobility/midp/ttips/HTTPPost/

我想你应该做的是:

std::string url("http://host.com/url");

std::string dataPayload("name=value&othername=anothervalue");//Query string payload style.
DWORD dataPayloadLength = dataPayload.length();

std::ostringstream headerStream;
headerStream << "content-length: ";
headerStream << dataPayloadLength;
std::string headers = headerStream.str();

DWORD headerLength = headers.length();

HINTERNET handle = HttpOpenRequest(hConnect,
    "POST",
    url.c_str(), 
    NULL, NULL, NULL,
    INTERNET_FLAG_RELOAD|INTERNET_FLAG_NO_CACHE_WRITE, 
    0);

if(!handle) {
    DWORD errorCode = GetLastError();
    //Handle error here.
}

//Use this thing to send POST values.
if(! HttpSendRequest(handle,
    headers.c_str(),
    headerLength,
    dataPayload, //lpOptional <--Your POST data...not really optional for you.
    dataPayloadLength) {

    DWORD errorCode = GetLastError();
    //Handle error here.
}

编辑:

看起来这家伙也有同样的问题,网址太长了。

http://social.msdn.microsoft.com/Forums/en-US/windowsmobiledev/thread/68612c89-bbce-4d88-926d-5d76771be944

经过一些挖掘,当一个AV或防火墙阻止了我的GET请求时,我得到了错误122。