将 Http 请求读入字节数组

Question

我正在开发一个需要接受 HTTP Post 请求并将其读入字节数组以进行进一步处理的网页。我有点坚持如何做到这一点，而且我很难做到最好的方法是什么。到目前为止，这是我的代码：

 public override void ProcessRequest(HttpContext curContext)
    {
        if (curContext != null)
        {
            int totalBytes = curContext.Request.TotalBytes;
            string encoding = curContext.Request.ContentEncoding.ToString();
            int reqLength = curContext.Request.ContentLength;
            long inputLength = curContext.Request.InputStream.Length;
            Stream str = curContext.Request.InputStream;

         }
       }

我正在检查请求的长度及其等于 128 的总字节数。现在我只需要使用 Stream 对象将其转换为 byte[] 格式吗？我是否朝着正确的方向前进？不知道如何进行。任何建议都会很棒。我需要将整个 HTTP 请求放入 byte[] 字段。

谢谢！

Answer 1

最简单的方法是将其复制到MemoryStream - 如果需要，然后调用ToArray。

如果您使用的是 .NET 4，那真的很简单：

MemoryStream ms = new MemoryStream();
curContext.Request.InputStream.CopyTo(ms);
// If you need it...
byte[] data = ms.ToArray();

编辑：如果您不使用 .NET 4，您可以创建自己的 CopyTo 实现。这是一个作为扩展方法的版本：

public static void CopyTo(this Stream source, Stream destination)
{
    // TODO: Argument validation
    byte[] buffer = new byte[16384]; // For example...
    int bytesRead;
    while ((bytesRead = source.Read(buffer, 0, buffer.Length)) > 0)
    {
        destination.Write(buffer, 0, bytesRead);
    }
}

Answer 2

class WebFetch
{
static void Main(string[] args)
{
    // used to build entire input
    StringBuilder sb = new StringBuilder();

    // used on each read operation
    byte[] buf = new byte[8192];

    // prepare the web page we will be asking for
    HttpWebRequest request = (HttpWebRequest)
        WebRequest.Create(@"http://www.google.com/search?q=google");

    // execute the request
    HttpWebResponse response = (HttpWebResponse)
        request.GetResponse();

    // we will read data via the response stream
    Stream resStream = response.GetResponseStream();

    string tempString = null;
    int count = 0;

    do
    {
        // fill the buffer with data
        count = resStream.Read(buf, 0, buf.Length);

        // make sure we read some data
        if (count != 0)
        {
            // translate from bytes to ASCII text
            tempString = Encoding.ASCII.GetString(buf, 0, count);

            // continue building the string
            sb.Append(tempString);
        }
    }
    while (count > 0); // any more data to read?

    // print out page source
    Console.WriteLine(sb.ToString());
    Console.Read();
    }
}

Answer 3

您可以使用 WebClient 来实现...

WebClient c = new WebClient();
byte [] responseData = c.DownloadData(..)

.. 是数据的 URL 地址。

Answer 4

我有一个函数可以做到这一点，通过发送响应流：

private byte[] ReadFully(Stream input)
{
    try
    {
        int bytesBuffer = 1024;
        byte[] buffer = new byte[bytesBuffer];
        using (MemoryStream ms = new MemoryStream())
        {
            int readBytes;
            while ((readBytes = input.Read(buffer, 0, buffer.Length)) > 0)
            {
               ms.Write(buffer, 0, readBytes);
            }
            return ms.ToArray();
        }
    }
    catch (Exception ex)
    {
        // Exception handling here:  Response.Write("Ex.: " + ex.Message);
    }
}

既然你有Stream str = curContext.Request.InputStream;，那么你可以这样做：

byte[] bytes = ReadFully(str);

如果你这样做了：

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(someUri);
req.Credentials = CredentialCache.DefaultCredentials;
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();

你可以这样称呼它：

byte[] bytes = ReadFully(resp.GetResponseStream());

Answer 5

我使用MemoryStream 和Response.GetResponseStream().CopyTo(stream)

HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url);
myRequest.Method = "GET";
WebResponse myResponse = myRequest.GetResponse();
MemoryStream ms = new MemoryStream();
myResponse.GetResponseStream().CopyTo(ms);
byte[] data = ms.ToArray();

Answer 6

对于所有那些 context.Request.ContentLength 大于零的情况，您可以简单地这样做：

byte[] contentBytes = context.Request.BinaryRead(context.Request.ContentLength);