formathandler.cpp

一个WinCE6。0下的IP phone的源代码

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this sample source code is subject to the terms of the Microsoft
// license agreement under which you licensed this sample source code. If
// you did not accept the terms of the license agreement, you are not
// authorized to use this sample source code. For the terms of the license,
// please see the license agreement between you and Microsoft or, if applicable,
// see the LICENSE.RTF on your install media or the root of your tools installation.
// THE SAMPLE SOURCE CODE IS PROVIDED "AS IS", WITH NO WARRANTIES.
//
#include "FormatHandler.h"
#include "XMLDataRecordParser.h"
#include "RequestParameters.h"

/*------------------------------------------------------------------------------
    CGenericFormatHandler::Initialize
    
    Initializes the parseparameter parsing table
------------------------------------------------------------------------------*/
HRESULT CGenericFormatHandler::Initialize(
    const ParseParameters * pParameters
    )
{
    if (pParameters == NULL)
    {
        return E_POINTER;
    }
    //ok to do a pointer copy since the struct is static const 
    m_pParameters = pParameters;
    return S_OK;
}

/*------------------------------------------------------------------------------
    CGenericFormatHandler::GetFormattedHttpParameters

    For this given format handler - get the Http Parameters to be used in the 
    XMLHttpRequest - 
        Method - Method type to be sent in the header (e.g. GET, POST, SEARCH)
        Url    - Url to direct the request to (e.g. server.domain.com)
        Body   - Body of the http request

    Default: 
    Must be overridden by subclasses

    Returns:
        E_NOTIMPL
------------------------------------------------------------------------------*/
HRESULT CGenericFormatHandler::GetFormattedHttpParameters(
    BSTR * pbstrMethod, 
    BSTR * pbstrUrl, 
    BSTR * pbstrBody
    )
{
    return E_NOTIMPL;
}

/*------------------------------------------------------------------------------
    CGenericFormatHandler::SetAdditionalHeaders

    For the current XMLHttpRequest, sets any additional headers in the request
    (for example: Content-Type:text/xml)

    Default: 
        Additional headers are not necessary for this request

    Returns:
        S_FALSE
------------------------------------------------------------------------------*/
HRESULT CGenericFormatHandler::SetAdditionalHeaders(
    IXMLHTTPRequest * piRequest
    )
{
    return S_FALSE;
}


/*------------------------------------------------------------------------------
    CGenericFormatHandler::SetParsingFormat
    
    Uses the internal parsing table to set the parsers datarecord and property tags
------------------------------------------------------------------------------*/
HRESULT CGenericFormatHandler::SetParsingFormat(
    CXMLDataRecordParser * pParser
    )
{
    //Trusted internal function - assert on params
    PREFAST_ASSERT(pParser != NULL);

    //also assert that initialization was done correctly
    PREFAST_ASSERT(m_pParameters != NULL);
    
    HRESULT     hr = S_OK;

    //Set the "new datarecord" tag from the parse table
    hr = pParser->SetNewDataRecordKeyword(m_pParameters->c_wszNewDataRecordName);

    //Run through the mapping table and set the tag mapping
    if (SUCCEEDED(hr))
    {
        const ParsePropertyMapping  *pMapping = &(m_pParameters->c_rgPropertyMappings[0]);
        while (SUCCEEDED(hr) && pMapping->c_wszProperty != NULL)
        {
            hr = pParser->SetDataRecordPropertyKeyword(
                pMapping->idx, 
                pMapping->c_wszProperty
                );
            pMapping++;
        }
    }

    ASSERT(SUCCEEDED(hr));
    return hr;
}

/*------------------------------------------------------------------------------
    CGenericFormatHandler::Initialize

    Subclasses should perform necessary initializations here. 
    
    Default: 
        E_NOTIMPL
------------------------------------------------------------------------------*/
HRESULT CGenericFormatHandler::Initialize(
    const WCHAR * c_wszServername,
    VOID * pvParam
    )
{
    return E_NOTIMPL;
}

/*------------------------------------------------------------------------------
    CGenericFormatHandler::SetAdditionalHeadersFromValue
    
    Sets the additional headers from reg values if the headers exists
    (are non-empty)
------------------------------------------------------------------------------*/
HRESULT CGenericFormatHandler::SetAdditionalHeadersFromValue(
    IXMLHTTPRequest * piRequest, 
    const WCHAR * c_wszHeaderName, 
    const WCHAR * c_wszValue
    )
{
    PREFAST_ASSERT(piRequest && c_wszHeaderName && c_wszValue);

    if (c_wszHeaderName[0] == L'\0' ||
        c_wszValue[0]      == L'\0'
        )
    {
        return S_FALSE;
    }

    ce::auto_bstr bstrName, bstrValue;
    HRESULT       hr = S_OK;
    
    bstrName = SysAllocString(c_wszHeaderName);
    if (bstrName == NULL)
    {
        hr = E_OUTOFMEMORY;
    }

    if (SUCCEEDED(hr))
    {
        bstrValue = SysAllocString(c_wszValue);
        if (bstrValue == NULL)
        {
            hr = E_OUTOFMEMORY;
        }
    }

    if (SUCCEEDED(hr))
    {
        hr = piRequest->setRequestHeader(bstrName, bstrValue);
    }

    return hr;
}