LInetHttp::LInetHttp
#include "ltwrappr.h"
L_VOID LInetHttp::LInetHttp(L_VOID)
L_VOID LInetHttp::LInetHttp(pszServer, pszUserName = NULL, pszPassword = NULL, nPort = 80)
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L_TCHAR *pszServer; |
/* name of server to connect to */ |
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L_TCHAR *pszUserName; |
/* username for authentication */ |
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L_TCHAR *pszPassword; |
/* password for authentication */ |
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L_INT nPort; |
/* port number to connect to */ |
Constructs and initializes the member variables of the LInetHttp object.
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Parameter |
Description |
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pszServer |
Character string that contains the name of the server to which to connect. The name can be a network name, an IP address, or a domain name (www.leadtools.com). |
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pszUserName |
Character string containing the username to be used for authentication. Default value is NULL. |
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pszPassword |
Character string containing the password to be used for authentication. Default value is NULL. |
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nPort |
Number of the port to which to connect. The default port assignment for web servers is 80. |
Returns
None.
Comments
LInetHttp::LInetHttp() is the default LInetHttp constructor. After calling the this constructor, a user must call LInetHttp::Connect to establish a connection before using other functions.
LInetHttp::LInetHttp(pszServer, pszUserName = NULL, pszPassword = NULL, nPort = 80) is a constructor for the LInetHttp object. It connects to the HTTP server. If both pszUserName and pszPassword are NULL, the connection is made anonymously.
A connection to an HTTP server must be established before using any other HTTP functions. If a connection is disconnected, via either LInetHttp::Disconnect or LInetHttp::~LInetHttp, then a connection must be re-established before any other HTTP functions are called. LInetHttp::Connect and LInetHttp::LInetHttp can be used to establish a connection with an HTTP server.
Required DLLs and Libraries
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LTWEB For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application |
See Also
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Functions: |
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Topics: |
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Example
//This example for LInetHttp::LInetHttp(L_VOID)
// This will call the default constructor and destructor when it is out of scope
L_INT LInetHttp_LInetHttpExample_1()
{
LInetHttp InetHttp;
// other code
return SUCCESS;
}
//-----------------------------------------------------------------------------------------------------------------------
/*This example for LInetHttp::LInetHttp(pszServer, pszUserName = NULL, pszPassword = NULL, nPort = 21)*/
// This example simulates posting a form to a web site
L_INT LInetHttp_LInetHttpExample_2(HWND hWndParent)
{
L_INT nRet;
L_UINT uStatus;
HANDLE pFile;
NAMEVALUE nv[2];
LBuffer Response;
L_UINT ulSize;
DWORD dwSizeWrite;
nv[0].pszName = TEXT("email");
nv[0].pszValue = TEXT("support@leadtools.com");
nv[1].pszName = TEXT("name");
nv[1].pszValue = TEXT("First Last");
LInetHttp InetHttp(TEXT("www.leadtools.com"));
// Checking if the connection failed
nRet = InetHttp.GetErrorFromList ();
if(nRet != SUCCESS)
{
InetHttp.DisplayError (hWndParent, TEXT("Can't connect to the HTTP web server"));
return nRet;
}
nRet = InetHttp.OpenRequest (HTTP_POST, TEXT("/form.asp"));
if(nRet != SUCCESS)
{
InetHttp.DisplayError (hWndParent, TEXT("Can't open a request"));
return nRet;
}
nRet = InetHttp.SendForm (nv, 2);
if(nRet != SUCCESS)
{
InetHttp.DisplayError(hWndParent, TEXT("Error while send the form"));
return nRet;
}
uStatus = InetHttp.GetServerStatus ();
// Checking if the an error occurred
nRet = InetHttp.GetErrorFromList ();
if(nRet != SUCCESS)
{
InetHttp.DisplayError (hWndParent, TEXT("Can't get the server status, the connection may refused"));
InetHttp.GetResponse (&Response);
ulSize = (L_UINT) Response.GetSize();
pFile = CreateFile(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\error.htm"), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
while(ulSize != 0)
{
WriteFile(pFile, Response.Lock (), ulSize, &dwSizeWrite, NULL);
Response.Unlock ();
InetHttp.GetResponse(&Response);
ulSize = (L_UINT) Response.GetSize ();
}
CloseHandle(pFile);
return nRet;
}
if(uStatus == L_HTTP_STATUS_OK)
{
nRet = InetHttp.GetResponse (&Response);
if(nRet != SUCCESS)
{
InetHttp.DisplayError (hWndParent, TEXT("Can't get the server reponse, the connection may refused"));
return nRet;
}
ulSize = (L_UINT) Response.GetSize();
pFile = CreateFile(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\output.htm"), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
while(ulSize != 0)
{
WriteFile(pFile, Response.Lock (), ulSize, &dwSizeWrite, NULL);
InetHttp.GetResponse(&Response);
ulSize = (L_UINT) Response.GetSize ();
}
CloseHandle(pFile);
}
return SUCCESS;
}
/*************************************************************************
Here is a sample form.asp that can be used with this sample.
<%@ LANGUAGE="VBSCRIPT" %>
<HTML>
<BODY>
<table>
<tr>
<td>Email:</td>
<td><% Response.Write Request("Email")%></td>
</tr>
<tr>
<td>Name:</td>
<td><% Response.Write Request("Name")%></td>
</tr>
</table>
</BODY>
<HTML>
*************************************************************************/