307 lines
8.4 KiB
C++
307 lines
8.4 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 2000.
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//
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// File: U D H I U T I L . C P P
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//
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// Contents: Implementation of various utility functions used by the
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// UPnP Device Host ISAPI extension
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//
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// Notes:
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//
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// Author: spather 2000/09/8
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//
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//----------------------------------------------------------------------------
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#include <pch.h>
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#pragma hdrstop
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#include <httpext.h>
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#include "wininet.h"
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#include "udhiutil.h"
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//+---------------------------------------------------------------------------
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//
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// Function: bSendResponseToClient
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//
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// Purpose: Sends an HTTP response to the originator of a request
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//
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// Arguments:
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// pecb [in] The extension control block for the request
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// pszStatus [in] HTTP status string e.g. "200 OK" or "400 Bad Request"
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// cchHeaders [in] Number of characters in pszHeaders string
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// pszHeaders [in] Headers string e.g. "Content-type: text/html\r\n\r\n"
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// cchBody [in] Number of bytes in pszBody
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// pszBody [in] Response body (may be NULL to send no body)
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//
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// Returns:
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// TRUE if successful
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// FALSE if unsuccessful (call GetLastError() to get error info)
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//
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// Author: spather 2000/09/7
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//
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// Notes:
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// All strings passed in must be NULL terminated.
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// pszHeaders string may contain multiple headers separated by \r\n pairs.
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// pszHeaders string must end in "\r\n\r\n" as required by HTTP
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// If a body is specified at pszBody, the pszHeaders string should contain
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// a Content-Length header.
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//
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BOOL
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bSendResponseToClient(
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IN LPEXTENSION_CONTROL_BLOCK pecb,
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IN LPCSTR pcszStatus,
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IN DWORD cchHeaders,
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IN LPCSTR pcszHeaders,
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IN DWORD cchBody,
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IN LPCSTR pcszBody)
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{
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BOOL bRet = TRUE;
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HSE_SEND_HEADER_EX_INFO HeaderExInfo;
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AssertSz(pecb,
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"bSendResponseToClient(): NULL pecb");
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AssertSz(pcszStatus,
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"bSendResponseToClient(): NULL pcszStatus");
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AssertSz(pcszHeaders,
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"bSendResponseToClient(): NULL pcszHeaders");
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BOOL fKeepConn = FALSE;
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bRet = pecb->ServerSupportFunction(
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pecb->ConnID,
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HSE_REQ_IS_KEEP_CONN,
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&fKeepConn,
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NULL,
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NULL);
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//
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// Prepare headers.
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//
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HeaderExInfo.pszStatus = pcszStatus;
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HeaderExInfo.pszHeader = pcszHeaders;
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HeaderExInfo.cchStatus = lstrlenA(pcszStatus);
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HeaderExInfo.cchHeader = cchHeaders;
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HeaderExInfo.fKeepConn = fKeepConn;
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//
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// Send the headers.
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//
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TraceTag(ttidUDHISAPI,
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"bSendResponseHeaders(): "
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"Sending Status \"%s\" and Headers:\n%s",
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pcszStatus,
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pcszHeaders);
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bRet = pecb->ServerSupportFunction(
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pecb->ConnID,
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HSE_REQ_SEND_RESPONSE_HEADER_EX,
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&HeaderExInfo,
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NULL,
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NULL);
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if (bRet)
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{
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//
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// Send the body if there is one.
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//
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if (pcszBody)
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{
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DWORD dwBytesToWrite = cchBody;
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bRet = pecb->WriteClient(pecb->ConnID,
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(LPVOID) pcszBody,
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&dwBytesToWrite,
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HSE_IO_SYNC);
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if (bRet)
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{
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AssertSz((cchBody == dwBytesToWrite),
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"bSendResponseToClient(): "
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"Didn't write the correct number of bytes");
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}
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else
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{
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TraceLastWin32Error("bSendResponseToClient(): "
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"Failed to send response body");
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}
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}
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}
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else
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{
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TraceLastWin32Error("bSendResponseToClient(): "
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"Failed to send response headers");
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}
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TraceTag(ttidUDHISAPI,
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"bSendResponseToClient(): "
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"Exiting - returning %d",
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bRet);
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return bRet;
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}
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VOID
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SendSimpleResponse(
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IN LPEXTENSION_CONTROL_BLOCK pecb,
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IN DWORD dwStatusCode)
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{
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BOOL fRet;
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static const CHAR c_szErrorHeaders[] = "\r\n";
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LPSTR szaResponse;
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switch(dwStatusCode)
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{
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case HTTP_STATUS_OK:
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szaResponse = "200 OK";
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break;
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case HTTP_STATUS_CREATED:
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szaResponse = "201 Created";
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break;
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case HTTP_STATUS_ACCEPTED:
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szaResponse = "202 Accepted";
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break;
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case HTTP_STATUS_NO_CONTENT:
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szaResponse = "204 No Content";
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break;
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case HTTP_STATUS_AMBIGUOUS:
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szaResponse = "300 Multiple";
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break;
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case HTTP_STATUS_MOVED:
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szaResponse = "301 Moved Permanently";
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break;
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case HTTP_STATUS_REDIRECT:
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szaResponse = "302 Moved Temporarily";
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break;
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case HTTP_STATUS_NOT_MODIFIED:
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szaResponse = "304 Not Modified";
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break;
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case HTTP_STATUS_BAD_REQUEST:
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szaResponse = "400 Bad Request";
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break;
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case HTTP_STATUS_DENIED:
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szaResponse = "401 Unauthorized";
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break;
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case HTTP_STATUS_FORBIDDEN:
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szaResponse = "403 Forbidden";
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break;
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case HTTP_STATUS_NOT_FOUND:
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szaResponse = "404 Not Found";
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break;
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case HTTP_STATUS_BAD_METHOD:
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szaResponse = "405 Method Not Allowed";
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break;
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case HTTP_STATUS_LENGTH_REQUIRED:
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szaResponse = "411 The Server Refused to Accept Request Without a Length";
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break;
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case HTTP_STATUS_PRECOND_FAILED:
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szaResponse = "412 Precondition Failed";
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break;
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case HTTP_STATUS_UNSUPPORTED_MEDIA:
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szaResponse = "415 Unsupported Media Type";
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break;
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case HTTP_STATUS_SERVER_ERROR:
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szaResponse = "500 Internal Server Error";
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break;
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case HTTP_STATUS_NOT_SUPPORTED:
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szaResponse = "501 Not Implemented";
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break;
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case HTTP_STATUS_BAD_GATEWAY:
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szaResponse = "502 Bad Gateway";
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break;
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case HTTP_STATUS_SERVICE_UNAVAIL:
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szaResponse = "503 Service Unavailable";
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break;
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default:
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AssertSz(FALSE, "You must pass in a known HTTP status code to "
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"SendErrorResponse()");
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break;
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}
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if (bSendResponseToClient(pecb, szaResponse, lstrlenA(c_szErrorHeaders),
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c_szErrorHeaders, 0, NULL))
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{
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pecb->dwHttpStatusCode = dwStatusCode;
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}
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DWORD dwHseStatus;
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dwHseStatus = (dwStatusCode >= HTTP_STATUS_BAD_REQUEST) ?
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HSE_STATUS_ERROR : HSE_STATUS_SUCCESS;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: DwQueryHeader
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//
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// Purpose: Queries one of the headers sent in an HTTP request
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//
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// Arguments:
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// pecb [in] Exetnsion control block
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// szaHeader [in] Header name to query
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// pszaResult [out] Returns value of header or NULL if not present
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//
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// Returns: ERROR_SUCCESS, ERROR_OUTOFMEMORY, or an ISAPI error code
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//
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// Author: danielwe 14 Aug 2000
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//
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// Notes:
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//
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DWORD DwQueryHeader(LPEXTENSION_CONTROL_BLOCK pecb, LPCSTR szaHeader,
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LPSTR *pszaResult)
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{
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DWORD cbHeader = 0;
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LPSTR szaBuf = NULL;
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DWORD dwReturn = ERROR_SUCCESS;
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Assert(pszaResult);
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*pszaResult = 0;
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if (!pecb->GetServerVariable(pecb->ConnID, (LPSTR)szaHeader, NULL, &cbHeader))
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{
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dwReturn = GetLastError();
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if (dwReturn == ERROR_INSUFFICIENT_BUFFER)
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{
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szaBuf = new CHAR[cbHeader / sizeof(CHAR)];
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if (szaBuf)
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{
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if (!pecb->GetServerVariable(pecb->ConnID, (LPSTR)szaHeader,
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(LPVOID)szaBuf, &cbHeader))
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{
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dwReturn = GetLastError();
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}
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else
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{
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*pszaResult = szaBuf;
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dwReturn = ERROR_SUCCESS;
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}
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}
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else
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{
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dwReturn = ERROR_OUTOFMEMORY;
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}
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}
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else
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{
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AssertSz(dwReturn != ERROR_SUCCESS, "How can it succeed if I gave"
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" it a NULL pointer!");
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}
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}
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return dwReturn;
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}
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