问

从原始http请求中读取多部分内容

fion依依315 发布于 2023-02-06 09:38

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.这是我一直在使用的代码示例和我试图读取的示例文件:

    var content = new MultipartFormDataContent();

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

            List lstStreamContents = new List();

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

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

文本文件 :

Cache-Control: no-cache
Connection: Close
Content-Length: 5216
Content-Type: multipart/related;
     boundary="cbsms-main-boundary";
     start="", 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: 




5947CCE35D5B4AEFB99DADDDF9472E67



6.5.0
hostname
1-1754394156

46707630767



72401


2008-05-08 11:16:39 Normal
Tube test




--cbsms-main-boundary
Content-Type: multipart/mixed;
     boundary="cbsms-sub-boundary"
Content-ID: 

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

  


 





--cbsms-sub-boundary
content-type: image/jpeg;
    Name=smslogo.jpg
content-transfer-encoding: Base64
content-location: smslogo.jpg
content-length: 2218

/9j/4AAQSkZJRgABAgAAZABkAAD/7AARRHVja3kAAQAEAAAAKgAA/+4ADkFkb2JlAGTAAAAA
Af/bAIQACwgICAgICwgICxAKCQoQEw4LCw4TFhERExERFhUREhISEhEVFRkaGxoZFSEhJCQh
ITAvLy8wNjY2NjY2NjY2NgEMCgoMDQwPDQ0PEw4ODhMUDg8PDhQaEhIUEhIaIhgVFRUVGCIe
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AQEAAAAAAAAAAAAAAAUAAQIEBgcDAQEBAQEBAAAAAAAAAAAAAAABAAIDBBAAAQMCAwQDCgkK
BwAAAAAAAQACAxEEIRIFMVETBkFhgXGRsSJCYrKT0xSh0TJScpIjMxbB4YKiJBUlNVUX8NJT
g6MmNhEBAAECBAQEBwAAAAAAAAAAAAERAiExcRKBkTKTQVGy0vAiQpKiAxP/2gAMAwEAAhED
EQA/ANDzDzHJYzughLpbx7i2KBhNTjhWnQvDTZ9bawy6jeOkkfiIG0DWV6KgVJ7VK5srePV7
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OD//2Q==

--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'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)
                    {

这给出了错误''意外结束的MIME多部分流.MIME多部分邮件不完整'

1 个回答

您正在添加一个空StreamContent的部分MultipartFormDataContent.当然,ReadAsMultipartAsync然后什么都不做.相反,你想读的StreamContent.此外,您的文件不仅包含内容,还包含标题.如果你剪掉标题,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
    }
}

2023-02-06 09:43 回答

this_is_me活在自己小世界

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