387 lines
10 KiB
C++
387 lines
10 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: D E S C R Q S T . C P P
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//
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// Contents: Implementation of description request processing for 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 2000/08/31
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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 <wininet.h>
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#include "descrqst.h"
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#include "udhiutil.h"
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#include "hostp.h"
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#include "uhcommon.h"
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#include "ncstring.h"
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//+---------------------------------------------------------------------------
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//
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// Function: HrValidateDescriptionMethod
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//
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// Purpose: Validates that the HTTP verb used is valid for this
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// type of request.
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//
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// Arguments:
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// pszaMethod [in] The HTTP verb
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//
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// Returns:
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// If the method is valid, the return value is S_OK. If the method is
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// not valid, the function returns one of the COM error codes defined
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// in WinError.h.
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//
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// Author: spather 2000/09/21
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//
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// Notes:
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//
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HRESULT
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HrValidateDescriptionMethod(
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IN LPSTR pszaMethod)
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{
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HRESULT hr = S_OK;
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AssertSz(pszaMethod,
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"HrValidateDescriptionMethod(): NULL Method passed");
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if (0 != lstrcmpiA(pszaMethod, "GET"))
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{
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hr = E_FAIL;
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}
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TraceError("HrValidateDescriptionMethod(): Exiting",
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hr);
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return hr;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: HrParseDescriptionQueryString
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//
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// Purpose: Parses a description request's query string and extracts
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// the content GUID from it.
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//
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// Arguments:
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// pszaQueryString [in] The query string to parse
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// rguidContent [out] Points to a GUID structure that will be
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// initialized with the content GUID as parsed
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//
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// Returns:
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// If the function succeeds, the return value is S_OK. Otherwise, the
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// function returns one of the COM error codes defined in WinError.h.
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//
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// Author: spather 2000/09/14
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//
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// Notes:
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//
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HRESULT
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HrParseDescriptionQueryString(
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IN LPSTR pszaQueryString,
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OUT GUID & rguidContent)
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{
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HRESULT hr = S_OK;
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LPWSTR szQueryString;
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Assert(pszaQueryString);
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szQueryString = WszFromSz(pszaQueryString);
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if (szQueryString)
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{
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hr = HrContentURLToGUID(szQueryString, rguidContent);
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delete [] szQueryString;
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}
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else
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{
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hr = E_OUTOFMEMORY;
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TraceError("HrParseDescriptionQueryString(): "
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"Unable to allocate memory for content URL",
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hr);
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}
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TraceError("HrParseDescriptionQueryString(): "
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"Exiting",
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hr);
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return hr;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: HrReturnContent
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//
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// Purpose: Retrieves content from a content source and sends it back
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// to the originator of a description request
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//
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// Arguments:
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// pecb [in] The extension control block for the description
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// request
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// pudcs [in] The dynamic content source
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// rguidContent [in] The GUID identifying the content being requested.
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//
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// Returns:
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// If the function succeeds, the return value is S_OK. Otherwise, the
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// function returns one of the COM error codes defined in WinError.h.
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//
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// Author: spather 2000/09/14
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//
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// Notes:
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//
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HRESULT
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HrReturnContent(
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LPEXTENSION_CONTROL_BLOCK pecb,
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IUPnPDynamicContentSource * pudcs,
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REFGUID rguidContent)
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{
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HRESULT hr = S_OK;
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LONG nHeaders = 0;
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LPWSTR * rgszHeaders = NULL;
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LONG nBytes = 0;
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BYTE * rgBytes = NULL;
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hr = pudcs->GetContent(rguidContent,
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&nHeaders,
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&rgszHeaders,
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&nBytes,
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&rgBytes);
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if (SUCCEEDED(hr))
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{
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DWORD cchHeaders = 0;
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LPSTR pszaHeaders = NULL;
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Assert(rgszHeaders);
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Assert(rgBytes);
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// Need to merge the headers into a single ASCII string. Each
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// Headers will be delimited by \r\n pairs and the last header
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// will be followed by 2 \r\n pairs.
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for (LONG i = 0; i < nHeaders; i++)
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{
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cchHeaders += lstrlenW(rgszHeaders[i]);
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cchHeaders += 2; // For the "\r\n" pair
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}
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cchHeaders += 2; // For the final "\r\n"
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pszaHeaders = new CHAR[cchHeaders+1];
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if (pszaHeaders)
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{
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LPSTR pszaNextHeader = pszaHeaders;
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for (LONG i = 0; i < nHeaders; i++)
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{
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DWORD cchCurHeader;
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cchCurHeader = lstrlenW(rgszHeaders[i]);
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wsprintfA(pszaNextHeader,
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"%S\r\n",
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rgszHeaders[i]);
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pszaNextHeader += cchCurHeader+2; // +2 for \r\n
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}
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lstrcpyA(pszaNextHeader,
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"\r\n");
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if (bSendResponseToClient(pecb,
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"200 OK",
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cchHeaders,
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pszaHeaders,
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nBytes,
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(LPCSTR) rgBytes))
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{
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pecb->dwHttpStatusCode = HTTP_STATUS_OK;
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TraceTag(ttidUDHISAPI,
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"HrReturnContent(): "
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"Successfully sent response to client");
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}
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delete [] pszaHeaders;
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pszaHeaders = NULL;
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}
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else
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{
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hr = E_OUTOFMEMORY;
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TraceError("HrReturnContent(): "
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"Failed to allocate memory for headers",
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hr);
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}
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// Free memory returned from GetContent().
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for (LONG i = 0; i < nHeaders; i++)
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{
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CoTaskMemFree(rgszHeaders[i]);
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rgszHeaders[i] = NULL;
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}
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CoTaskMemFree(rgszHeaders);
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rgszHeaders = NULL;
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CoTaskMemFree(rgBytes);
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rgBytes = NULL;
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}
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else
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{
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TraceError("HrReturnContent(): "
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"Failed to get content",
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hr);
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}
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TraceError("HrReturnContent(): "
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"Exiting",
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hr);
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return hr;
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}
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DWORD WINAPI
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DwHandleContentRequest(
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LPVOID lpParameter)
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{
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LPEXTENSION_CONTROL_BLOCK pecb = NULL;
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DWORD dwStatus = HSE_STATUS_SUCCESS ;
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HCONN ConnID;
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HRESULT hr = S_OK;
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GUID guidContent;
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BOOL fKeepConn = FALSE;
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pecb = (LPEXTENSION_CONTROL_BLOCK) lpParameter;
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AssertSz(pecb,
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"DwHandleContentRequest(): "
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"NULL extension control block");
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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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if(fKeepConn)
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dwStatus = HSE_STATUS_SUCCESS_AND_KEEP_CONN;
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else
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dwStatus = HSE_STATUS_SUCCESS;
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ConnID = pecb->ConnID;
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AssertSz(pecb->lpszQueryString,
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"DwHandleContentRequest(): "
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"NULL query string passed");
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// Validate the method.
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hr = HrValidateDescriptionMethod(pecb->lpszMethod);
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if (SUCCEEDED(hr))
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{
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// Get the content GUID.
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TraceTag(ttidUDHISAPI,
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"DwHandleContentRequest(): ConnID(0x%x) "
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"Query string is %s",
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ConnID,
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pecb->lpszQueryString);
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hr = HrParseDescriptionQueryString(pecb->lpszQueryString,
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guidContent);
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if (SUCCEEDED(hr))
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{
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hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
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if (SUCCEEDED(hr))
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{
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IUPnPDynamicContentSource * pudcs = NULL;
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hr = CoCreateInstance(CLSID_UPnPDynamicContentSource,
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NULL,
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CLSCTX_INPROC_SERVER,
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IID_IUPnPDynamicContentSource,
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(void **) &pudcs);
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if (SUCCEEDED(hr))
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{
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hr = HrReturnContent(pecb,
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pudcs,
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guidContent);
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pudcs->Release();
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}
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else
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{
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TraceTag(ttidUDHISAPI,
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"DwHandleContentRequest(): ConnID(0x%x): "
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"Failed to CoCreate dynamic content source, "
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" HRESULT == 0x%x",
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ConnID,
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hr);
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}
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CoUninitialize();
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}
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else
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{
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TraceTag(ttidUDHISAPI,
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"DwHandleContentRequest(): ConnID(0x%x): "
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"Failed to initialize COM, HRESULT == 0x%x",
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ConnID,
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hr);
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}
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}
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else
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{
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TraceTag(ttidUDHISAPI,
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"DwHandleContentRequest(): ConnID(0x%x): "
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"Failed to get content GUID, HRESULT == 0x%x",
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ConnID,
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hr);
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}
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}
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else
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{
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TraceTag(ttidUDHISAPI,
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"DwHandleContentRequest(): ConnID(0x%x): "
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"Failed to validate method %s, HRESULT == 0x%x",
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ConnID,
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pecb->lpszMethod,
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hr);
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}
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if (FAILED(hr))
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{
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LPCSTR pcszErrorHeaders = "\r\n";
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dwStatus = HSE_STATUS_ERROR;
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if (bSendResponseToClient(pecb,
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"500 Internal Server Error",
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lstrlenA(pcszErrorHeaders),
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pcszErrorHeaders,
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0,
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NULL))
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{
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pecb->dwHttpStatusCode = HTTP_STATUS_SERVER_ERROR;
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}
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}
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return dwStatus ;
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}
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