删除HTTP标题信息 [英] Remove HTTP Header Info

问题描述

在C中，有一种方法可以在套接字上使用 recv（）时排除数据附带的HTTP头信息。我试图读取一些二进制数据，我想要的只是实际的二进制信息，而不是HTTP头信息。收到的当前数据如下所示：

  HTTP / 1.1 200 OK 
 Content-Length：3314 
 Content-Type：image / jpeg 
 Last-Modified：Tue，20 Mar 2012 14:51:34 GMT 
 Accept-Ranges：bytes 
 ETag：45da99f1a86cd1：6b9
服务器：Microsoft-IIS / 6.0 
 X-Powered-By：ASP.NET 
日期：2012年8月20日星期一14:10:08 GMT 
连接：关闭
 
╪α
  

我只想读取文件的二进制部分。 （这显然不是所有的二进制文件，只有那么多显示，因为我把我的recv循环的输出作为字符串打印出来，而第一个NULL字符在那个小的二进制字符串之后）。

我只需要摆脱标题部分，是否有一个简单的方法来做到这一点？ 您需要提取 Content-Length 的值来知道要读取的二进制数据的大小，否则无法知道是否已收到所有数据。一个简单的方法来消费并且大部分忽略头部分，就是逐字节地读入传入的数据，直到\r\\\
\r\\\
，这表示标题部分的结束和内容的开始。

In C is there a way to exclude the HTTP header information that comes with the data when using recv() on a socket? I am trying to read some binary data and all I want is the actual binary information, not the HTTP header information. The current data received looks like this:

HTTP/1.1 200 OK
Content-Length: 3314
Content-Type: image/jpeg
Last-Modified: Tue, 20 Mar 2012 14:51:34 GMT
Accept-Ranges: bytes
ETag: "45da99f1a86cd1:6b9"
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Date: Mon, 20 Aug 2012 14:10:08 GMT
Connection: close 

╪ α

I would like only to read the binary portion of the file. (That's obviously not all the binary, only that much was displayed since I printed the output from my recv loop as a string and the first NULL char is after that small binary string).

I just need to get rid of the header portion, is there a simple way to do this?

解决方案

I think you need to extract the value of the Content-Length to know the size of the binary data to be read otherwise it will be impossible to know whether all data has been received. A simple approach to consume, and mostly ignore, the header portion is to read the incoming data byte-by-byte until "\r\n\r\n" is encountered, which indicates the end of the header section and the beginning of the content.

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