Question

我正在将原始HTTP请求保存到文本文件中，我需要读取其中的多部分内容。我知道有很多第三方工具可以做到这一点，但如果可能的话，我需要使用.NET框架。我已经尝试将txt文件读入流中，但我不知道如何提取多部分内容。以下是我一直使用的代码示例以及我尝试阅读的示例文件：

    var content = new MultipartFormDataContent();

            var stream = new StreamContent(File.Open(@"C:\temp\test.txt", FileMode.Open));
            content.Add(stream);

            List<StreamContent> lstStreamContents = new List<StreamContent>();

            if (content != null)
            {
                if (content.IsMimeMultipartContent())
                    await content.ReadAsMultipartAsync(StreamProvider);

                foreach (MultipartContent multiPartContent in content)
                {
                    foreach (var streamContent in multiPartContent).....

文字档案：

Cache-Control: no-cache
Connection: Close
Content-Length: 5216
Content-Type: multipart/related;
     boundary="cbsms-main-boundary";
     start="<soap-envelope>", text/xml;
     charset=utf-8
Accept: */*
Host: hostname
User-Agent: Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
soapaction: ""

This is a multi-part message in MIME format.

--cbsms-main-boundary
Content-Type: text/xml;
     charset="utf-8"
Content-ID: <soap-envelope>

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header>
<mm7:TransactionID
xmlns:mm7="http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL
-6-MM7-1-2">5947CCE35D5B4AEFB99DADDDF9472E67</mm7:TransactionID>
</SOAP-ENV:Header>
<SOAP-ENV:Body>
<mm7:DeliverReq
xmlns:mm7="http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL
-6-MM7-1-2">
<mm7:MM7Version>6.5.0</mm7:MM7Version>
<mm7:MMSRelayServerID>hostname</mm7:MMSRelayServerID>
<mm7:LinkedID>1-1754394156</mm7:LinkedID>
<mm7:SenderAddress>
<mm7:Number>46707630767</mm7:Number>
</mm7:SenderAddress>
<mm7:Recipients>
<mm7:To>
<mm7:Number>72401</mm7:Number>
</mm7:To>
</mm7:Recipients>
<mm7:TimeStamp>2008-05-08 11:16:39</mm7:TimeStamp> <mm7:Priority>Normal</mm7:Priority>
<mm7:Subject>Tube test</mm7:Subject>
</mm7:DeliverReq>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

--cbsms-main-boundary
Content-Type: multipart/mixed;
     boundary="cbsms-sub-boundary"
Content-ID: <MM7-Media>

--cbsms-sub-boundary
content-type: application/smil;
    Name=main.smil;Charset=utf-8
content-transfer-encoding: 7bit
content-id: <AAAA>
content-length: 483

<smil><head><layout><root-layout backgroundColor="#FFFFFF"
background-color="#FFFFFF" height="480px" width="640px"/> <region id="Image" top="0" left="0" height="50%" width="100%" fit="meet"/> <region id="Text" top="50%" left="0" height="50%" width="100%"
fit="scroll"/>
</layout>
</head>
<body><par dur="4000ms"><img src="smslogo.jpg" region="Image"></img> <text src="smil.txt" region="Text"><param name="foreground-color"
value="#000000"/>
</text>
</par>
</body>
</smil>

--cbsms-sub-boundary
content-type: image/jpeg;
    Name=smslogo.jpg
content-transfer-encoding: Base64
content-location: smslogo.jpg
content-length: 2218
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--cbsms-sub-boundary
content-type: text/plain;
    Name=smil.txt;Charset=utf-8
content-transfer-encoding: 7bit
content-location: smil.txt
content-length: 9

Tube test
--cbsms-sub-boundary--

--cbsms-main-boundary--

目前我收到此错误'无法将类型为'System.Net.Http.StreamContent'的对象强制转换为'System.Net.Http.MultipartContent'。'

编辑：

foreach (var part in multipart.Contents)
            {
                if (part.Headers.ContentType.MediaType == "multipart/mixed")
                {
                    if (part.IsMimeMultipartContent())
                        await part.ReadAsMultipartAsync(StreamProvider);

                    foreach (MultipartContent multiPartContent in StreamProvider.Contents)
                    {

这会出现错误''意外结束MIME多部分流。 MIME多部分消息不完整'

Answer 1

您要将StreamContent作为部分添加到空MultipartFormDataContent。当然，ReadAsMultipartAsync然后什么都不做。相反，您希望读取 StreamContent。此外，您的文件不仅包含内容，还包含标题。如果您剪掉标题，这应该有效：

using (var stream = File.Open (@"C:\temp\test.txt", FileMode.Open))
{
    // note: StreamContent has no Content-Type set by default
    // set a suitable Content-Type for ReadAsMultipartAsync()
    var content = new StreamContent (stream) ;
    content.Headers.ContentType = 
        System.Net.Http.Headers.MediaTypeHeaderValue.Parse (
            "multipart/related; boundary=cbsms-main-boundary") ;

    // TODO: make this recursive if required...
    var outerMultipart = await stream.ReadAsMultipartAsync () ;

    foreach (var outerPart in outerMultipart.Contents)
    {
        if (outerPart.IsMimeMultipartContent())
        {
            var innerMultipart = await outerPart.ReadAsMultipartAsync () ;

            foreach (var innerPart in innerMultipart.Contents) // do stuff
        }
        else // do other stuff
    }
}

Answer 2

使用HttpContentMultipartExtensions类和ReadAsMultipartAsync方法 http://msdn.microsoft.com/en-us/library/hh835439%28v=vs.108%29.aspx

很好的例子在这里： http://www.asp.net/web-api/overview/working-with-http/sending-html-form-data,-part-2

从原始http请求中读取多部分内容

2 个答案: