Thread: WININET HttpOpenRequest Help

I am trying to check if a port is open using the internet site ismyportopen.com, i seem to get to the function HttpOpenRequest working with this get request...

g_hHttpRequest = HttpOpenRequest(g_hNetSession, "GET //processors/port-check.php?ip=xxx.xx.x.xxx&port=80&t=1406357001803" , "", "HTTP/1.1", "", NULL, INTERNET_FLAG_KEEP_CONNECTION, 0);
if(g_hHttpRequest == NULL)
printf("HttpOpenRequest() returned NULL %d\n",GetLastError());

GetlastError returns
ERROR_INVALID_PARAMETER
87 (0x57)
The parameter is incorrect.

the string was captured with a chrome http logger so i dont know how its giving me an error..

HttpOpenRequest function (Windows)
Notice how everything is a TSTR

Using Generic-Text Mappings
You need to use _TEXT("foo") in place of all your "foo" strings.

Now ive got this

g_hNetSession = InternetConnect(g_hRoot, _TEXT("ismyportopen.com"), INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);

g_hHttpRequest = HttpOpenRequest(g_hNetSession, _TEXT("GET //processors/port-check.php?ip=xxx.xx.x.xxx&port=5050&t=140635700180 3"), "", _TEXT("HTTP/1.1"), "", NULL, INTERNET_FLAG_KEEP_CONNECTION, 0);

But still have the same issue,btw thanks for replying...

Sure, and what about these as well?

_TEXT("")

Those are set to NULL instead now

Still cant get it working

g_hHttpRequest = HttpOpenRequest(g_hNetSession, _TEXT("GET //processors/port-check.php?ip=xxx.xx.x.xxx&port=5050&t=140635700180 3"), "", _TEXT("HTTP/1.1"), "", NULL, INTERNET_FLAG_KEEP_CONNECTION, 0);
> Those are set to NULL instead now

Are you even reading the manual page?

Parameters

hConnect [in]
A handle to an HTTP session returned by InternetConnect.

lpszVerb [in]
A pointer to a null-terminated string that contains the HTTP verb to use in the request. If this parameter is NULL, the function uses GET as the HTTP verb.

lpszObjectName [in]
A pointer to a null-terminated string that contains the name of the target object of the specified HTTP verb. This is generally a file name, an executable module, or a search specifier.

lpszVersion [in]
A pointer to a null-terminated string that contains the HTTP version to use in the request. Settings in Internet Explorer will override the value specified in this parameter.
If this parameter is NULL, the function uses an HTTP version of 1.1 or 1.0, depending on the value of the Internet Explorer settings.

Where do you see in this that the 3rd parameter can be NULL ?

You might also wonder why you think the empty string is a good idea as well.

> Still cant get it working
That's a shame.
But you need to post your latest code and error messages if you want a better response.
Ideally, code that will compile and run. A few lines barely cuts it, and 1-line posts of "it doesn't work" are a complete waste of space.