Thread: internet post method using wininet.dll

I have a application that has a file submit section and I want to post a file to my website. I have a php page that accepts incoming file and stores it in the server. I want to do it using wininet.dll not C++ library functions in winsock2.h and ws2_32.dll

it works for GET method but I want to post a file using it. so, I changed a little it but dunno how to post a file using it yet!

the php page's code is:
<?php
$msg = copy($_FILES[MyFile][tmp_name],$_FILES[MyFile][name]) ? "Yes" : "No";
echo $msg;
?>
<form ENCTYPE="multipart/form-data" ACTION="" METHOD="POST">
<input NAME="MyFile" TYPE="file">
<input VALUE="Upload!" TYPE="submit"></form>

my code is this:
//************************************************
void main(int argc, char *argv[])
{
if (argc != 3)
{
cout << "Usage: download <host> <object>" << endl;
return;
}

HINTERNET hSession = InternetOpen("WinInet Doenload Sample",
INTERNET_OPEN_TYPE_PRECONFIG,
NULL,
NULL,
0);
HINTERNET hConnection = InternetConnect(hSession,
argv[1], // Server
INTERNET_DEFAULT_HTTP_PORT,
NULL, // Username
NULL, // Password
INTERNET_SERVICE_HTTP,
0, // Synchronous
NULL); // No Context

HINTERNET hRequest = HttpOpenRequest(hConnection,
"GET",
argv[2],
NULL, // Default HTTP Version
NULL, // No Referer
(const char**)"*/*\0", // Accept
// anything
0, // Flags
NULL); // No Context
HttpSendRequest(hRequest,
NULL, // No extra headers
0, // Header length
NULL, // No Body
0); // Body length

DWORD dwContentLen;
DWORD dwBufLen = sizeof(dwContentLen);
if (HttpQueryInfo(hRequest,
HTTP_QUERY_CONTENT_LENGTH | HTTP_QUERY_FLAG_NUMBER,
(LPVOID)&dwContentLen,
&dwBufLen,
0))
{
// You have a content length so you can calculate percent complete
char *pData = (char*)GlobalAlloc(GMEM_FIXED, dwContentLen + 1);
DWORD dwReadSize = dwContentLen;
DWORD dwBytesRead;

InternetReadFile(hRequest, pData, dwReadSize, &dwBytesRead);
// Null terminate data
pData[dwContentLen] = 0;

// Display
cout << endl << "Download Complete" << endl;
cout << pData;
}
else
{
DWORD err = GetLastError();
// No content length...
// Just read until we are done.
char pData[100];
DWORD dwBytesRead = 1;
while (dwBytesRead)
{
InternetReadFile(hRequest, pData, 99, &dwBytesRead);
pData[dwBytesRead] = 0;
cout << pData;
}
}
}
//************************************************
thank you very much
regards

Heres a link for WinHTTP documentation on msdn http://msdn.microsoft.com/en-us/libr...8VS.85%29.aspx and http://msdn.microsoft.com/en-us/libr...8VS.85%29.aspx for wininet.

please use code tags :-) it is hard for people to read what you have coded without them.

Code:

my code is this:
//************************************************
void main(int argc, char *argv[])
{
if (argc != 3)
{
cout << "Usage: download <host> <object>" << endl;
return;
}

HINTERNET hSession = InternetOpen("WinInet Doenload Sample",
INTERNET_OPEN_TYPE_PRECONFIG,
NULL,
NULL,
0);
HINTERNET hConnection = InternetConnect(hSession,
argv[1], // Server
INTERNET_DEFAULT_HTTP_PORT,
NULL, // Username
NULL, // Password
INTERNET_SERVICE_HTTP,
0, // Synchronous
NULL); // No Context

HINTERNET hRequest = HttpOpenRequest(hConnection,
"GET",
argv[2],
NULL, // Default HTTP Version
NULL, // No Referer
(const char**)"*/*\0", // Accept
// anything
0, // Flags
NULL); // No Context
HttpSendRequest(hRequest,
NULL, // No extra headers
0, // Header length
NULL, // No Body
0); // Body length

DWORD dwContentLen;
DWORD dwBufLen = sizeof(dwContentLen);
if (HttpQueryInfo(hRequest,
HTTP_QUERY_CONTENT_LENGTH | HTTP_QUERY_FLAG_NUMBER,
(LPVOID)&dwContentLen,
&dwBufLen,
0))
{
// You have a content length so you can calculate percent complete
char *pData = (char*)GlobalAlloc(GMEM_FIXED, dwContentLen + 1);
DWORD dwReadSize = dwContentLen;
DWORD dwBytesRead;

InternetReadFile(hRequest, pData, dwReadSize, &dwBytesRead);
// Null terminate data
pData[dwContentLen] = 0;

// Display
cout << endl << "Download Complete" << endl;
cout << pData;
}
else
{
DWORD err = GetLastError();
// No content length...
// Just read until we are done.
char pData[100];
DWORD dwBytesRead = 1;
while (dwBytesRead)
{
InternetReadFile(hRequest, pData, 99, &dwBytesRead);
pData[dwBytesRead] = 0;
cout << pData;
}
}
}
//************************************************
thank you very much
regards

Happy? :p

0exception:
thank you for your links but as you see my code works for GET and I have some problem for POST using the given php code. your links was good but didn't help me. whatever! thank you

albinoskunk:
sorry but as you see me name i'm beginner
I'll use it after this...

mjrod5:
thank you for putting my code in code tag dude.

well, you know, I have a POST method code too that works but it works for php pages that give url parameters. I'm now in university and can not post you the code but if I return to home, I'll post you the code. maybe you can change the can in my way

thank you all
regards

Code:

#include <windows.h>
#include <wininet.h>
#include <tchar.h>
 
#pragma comment(lib,"wininet.lib")
 
int main()
{
        static TCHAR frmdata[] = _T("name=John+Doe&userid=hithere&other=P%26Q");
    //static LPSTR accept[2]={"*/*", NULL};
 
    // for clarity, error-checking has been removed
 
        static TCHAR hdrs[2048] = _T("-----------------------------23281168279961\r\n");
        strcat(hdrs,"Content-Disposition: form-data; name=\"MyFile\"; filename=\"");
        TCHAR fname[] = "test.txt";
        TCHAR content[] = "this is a test";
        strcat(hdrs,fname);
        strcat(hdrs,"\"\r\n");
        strcat(hdrs,"Content-Type: text/plain\r\n\r\n");
        strcat(hdrs,content);
        strcat(hdrs,"\r\n");
        strcat(hdrs, "-----------------------------23281168279961--\r\n");
           
        HINTERNET hSession = InternetOpen("MyAgent",INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
    HINTERNET hConnect = InternetConnect(hSession, _T("localhost"),INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1);
    HINTERNET hRequest = HttpOpenRequest(hConnect, (const char*)"POST",_T("uploader.php"), NULL, NULL, (const char**)"*/*\0", 0, 1);
    HttpSendRequest(hRequest, hdrs, strlen(hdrs), frmdata, strlen(frmdata));
    // close any valid internet-handles
    InternetCloseHandle(hSession);
    InternetCloseHandle(hConnect);
    InternetCloseHandle(hRequest);
    return 0;
}

indeed my problem is that my file content should be between header and i dunno what to do

-----------------------------23281168279961
Content-Disposition: form-data; name="MyFile"; filename="test.txt"
Content-Type: text/plain

these line is in test.txt that should be uploaded. this line is my file's content
-----------------------------23281168279961--


regards

instead of using all those strcat's like this:

Code:

 
static TCHAR hdrs[2048] = _T("-----------------------------23281168279961\r\n");
        strcat(hdrs,"Content-Disposition: form-data; name=\"MyFile\"; filename=\"");
        TCHAR fname[] = "test.txt";
        TCHAR content[] = "this is a test";
        strcat(hdrs,fname);
        strcat(hdrs,"\"\r\n");
        strcat(hdrs,"Content-Type: text/plain\r\n\r\n");
        strcat(hdrs,content);
        strcat(hdrs,"\r\n");
        strcat(hdrs, "-----------------------------23281168279961--\r\n");

try replace them with a single sprintf, should tighten up your code abit :-)

Code:

       
static TCHAR hdrs[2048] = _T("-----------------------------23281168279961\r\n");
        strcat(hdrs,"Content-Disposition: form-data; name=\"MyFile\"; filename=\"");
        TCHAR fname[] = "test.txt";
        TCHAR content[] = "this is a test";

sprintf(hdrs, "%s\"\r\nContent-Type: text/plain\r\n\r\n %s \r\n-----------------------------23281168279961--\r\n", fname, content);

i typed the above on my laptop in the reply box so i expect there is a typo in there ;-)

i have yet to really read your code fully, but those strcat's just seemed to take up quite some space so i thought i would show you a small "fix".

good luck with solving your problem, stick at it and i am sure you will over come the problem.

-AlbinoSkunk.

Fixed and working...

Code:

#include <stdio.h>
#include <windows.h>
#include <wininet.h>

 
int main(void) {
	char url[] = "upload.php?name=value";
	char contenttype[] = "content-type: multipart/form-data; " 
	"boundary=-----------------------------23281168279961\r\n";
	char body[1024] = "-------------------------------23281168279961\r\n"
	"content-disposition: form-data; name=\"file\"; filename=\"test.txt\"\r\n"
	"content-type: text/plain\r\n"
	"\r\n"
	"these line is in test.txt that should be uploaded. this line is my file's content"
	"\r\n"
	"-------------------------------23281168279961"
	"\r\n";

	HINTERNET hSession = InternetOpen("",INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
    
	if (!hSession) { 
		fprintf(stderr, "InternetOpen failed.\r\n");
		return -1;
	}

	HINTERNET hConnect = InternetConnect(hSession, "localhost",INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1);
    
	if (!hConnect) {
		fprintf(stderr, "InternetConnect failed.\r\n");
		return -1;
	}
	
	HINTERNET hRequest = HttpOpenRequest(hConnect, "POST", url, "HTTP/1.0", NULL, (const char**)"*/*", 0, 0);
    
	if (!hRequest) {
		fprintf(stderr, "InternetRequest failed.\r\n");
		return -1;
	}
	
	if (!HttpAddRequestHeaders(hRequest, contenttype, strlen(contenttype), 0)) {
		fprintf(stderr, "HttpAddRequestHeaders failed.\r\n");
		fprintf(stderr, "Error: %i", GetLastError());
		return -1;
	}

	
	if (!HttpSendRequest(hRequest, NULL, 0, body, strlen(body))) {
		fprintf(stderr, "HttpSendRequest failed.\r\n");
		fprintf(stderr, "Error: %i", GetLastError());
	}
    
    InternetCloseHandle(hSession);
    InternetCloseHandle(hConnect);
    InternetCloseHandle(hRequest);
	
    return 0;
}

thank you very much 0exception, for answering me

my php code is this:

Code:

<?php
$msg = copy($_FILES[MyFile][tmp_name],$_FILES[MyFile][name]) ? "Yes" : "No";
echo $msg;
?>
<form ENCTYPE="multipart/form-data" ACTION="" METHOD="POST">
<input NAME="MyFile" TYPE="file">
<input VALUE="Upload!" TYPE="submit"></form>

I tested your code, didn't work! and I changed a lot your code and didn't work again!
I think if you test for my php would not work. this did not work on my local apache (

so, any idea my friend?
thank you and other people
yours sincerely