Httpsendrequest() function, error 12005 - "the URL is invalid" [SOLVED]

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Hi All,
So I try to write a simple code for HTTP GET and POST sessions.
InternetOpen(), InternetConnect() and OpenRequest() functions work, or at least they provide a valid pointer. Now when I call the HttpSendRequest() function, it keeps coming back with an error 12005 ("The URL is invalid"). The URL is: http://145.239.244.171:3001/api/get/customers.
Thanks for your help.

C++

LPCWSTR host = L"http://145.239.244.171";
LPCWSTR url = L"api/get/customers";
HINTERNET hIntOpen = InternetOpen((LPCTSTR)"Mozilla/5.0 (Windows NT 6.1; rv:58.0) Gecko/20100101 Firefox/58.0", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
HINTERNET hIntConnect = InternetConnect(hIntOpen, host, 3001, NULL, NULL, INTERNET_SERVICE_HTTP, INTERNET_FLAG_KEEP_CONNECTION | INTERNET_FLAG_NO_CACHE_WRITE, 0);
HINTERNET hHttpOpenReq = HttpOpenRequest(hIntConnect, _T("GET"), url, NULL, NULL, 0, INTERNET_FLAG_RELOAD, 0);

BOOL hHttpSendReq = HttpSendRequest(hHttpOpenReq, NULL, NULL, 0, 0);

if (!hHttpSendReq)
{
    DWORD ErrorNum = GetLastError();
    std::cout << "Failed to open URL \nError No: " << ErrorNum;
    InternetCloseHandle(hIntConnect);
    InternetCloseHandle(hIntOpen);
    getchar();
    return 0;
}

What I have tried:

I checked many examples on the net, I tried to set different arguments in the function calls, but my assumption is still just an assumption. I also tried to provide the port number (3001) in the InternetConnect() function instead of INTERNET_DEFAULT_HTTP_PORT.

Posted 19-Feb-18 12:10pm

m_smith

Updated 22-Feb-18 10:37am

v5

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Comments

phil.o 19-Feb-18 18:19pm

IMO, the port number should be part of the host, not the url. Have you tried to declare host as http://145.255.244.171:3001 and url as /api/get/customers instead?

m_smith 19-Feb-18 18:24pm

In that case I get an error 12007 ("The server name could not be resolved").

Rick York 19-Feb-18 19:15pm

Have you tried it with the port on the end of the URL : /api/get/customers:3001?

m_smith 19-Feb-18 19:24pm

Yeah, the same result...

phil.o 19-Feb-18 20:40pm

Could you try

LPCWSTR host = L"145.255.244.171";
LPCWSTR url = L"/api/get/customers";
// ...
HINTERNET hIntConnect = InternetConnect(hIntOpen, host, 3001, NULL, NULL, INTERNET_SERVICE_HTTP, INTERNET_FLAG_KEEP_CONNECTION | INTERNET_FLAG_NO_CACHE_WRITE, 0);

?
It seems to me specifying the protocol in the server name is redundant, since this protocol is later specified in the call to the InternetConnect function.

m_smith 19-Feb-18 20:54pm

I just tried it recently and forgot to post it here, but now I did. Unfortunately the same result, error 12005.

phil.o 19-Feb-18 21:00pm

Well, 12005 is ERROR_INTERNET_INVALID_URL; that could be considered a progress :)
Can you remove the leading slash from the url? (url = L"api/get/customers";)

m_smith 19-Feb-18 21:07pm

the same... thanks for your efforts :)

phil.o 19-Feb-18 21:16pm

I see from here that there exist some unicode versions of those functions. Maybe you could have a look/try?
I'm going to bed now, so I won't answer until a few hours.

2 solutions

Solution 1

You must learn to understand that the error is the answer of the server to your request. That means that the server dont understand your URL. I would guess that the URL isnt valid or you are on the wrong port. Why dont you use the standard port 80?

Try the request in the browser.

Tip: use for all string the same macro. => _T()
Tip 2: use Wireshark to see the network traffic

Posted 19-Feb-18 20:19pm

KarstenK

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m_smith · Accepted Answer · 2018-02-20T08:59:00

Ok, thanks for your efforts, guys, I found the solution, i should have removed 'http://' from the URL... that's it :) if anybody is interested, here is the code :

int main()
{
	LPCWSTR host = _T("145.239.244.171");
	LPCWSTR url = _T("api/get/customers");
	HINTERNET hIntOpen = InternetOpen(_T("Mozilla/5.0 (Windows NT 6.1; rv:58.0) Gecko/20100101 Firefox/58.0"), INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
	HINTERNET hIntConnect = InternetConnect(hIntOpen, host, 3001, NULL, NULL, INTERNET_SERVICE_HTTP, INTERNET_FLAG_KEEP_CONNECTION | INTERNET_FLAG_NO_CACHE_WRITE, 0);
	HINTERNET hHttpOpenReq = HttpOpenRequest(hIntConnect, _T("GET"), url, NULL, NULL, 0, INTERNET_FLAG_RELOAD, 0);

	BOOL hHttpSendReq = HttpSendRequest(hHttpOpenReq, NULL, NULL, 0, 0);