.net - HTTP响应何时结束？

Question

我出于学习目的在.NET中编写了一个简单的HTTP客户端。我正在使用.NET Socket类，最终使用了Winsock。我不想使用WebRequest，HttpWebRequest或HttpClient类，因为它们使用了WinINet，因为我对HTTP的工作原理有自己的了解，所以我不想使用它们。

我想知道如何确定HTTP响应何时完成。通过阅读HTTP/1.1规范(RFC 2616)，我认为以下伪代码是如何确定何时完成HTTP响应的伪代码。

parse HTTP headers
if parse not successful:
    throw error
if HTTP version is 1.1 and Transfer-encoding is chunked:
    parse first line of each chunk as an ASCII hexadecimal, the chunk size
    if parse not successful:
        throw error
    read each chunk until chunk size 0
else if Content-Length is specified:
    read Content-Length number of bytes
else:
    throw error

这是一种或多或少的正确方法吗？

Answer 1

根据RFC 2616 Section 4.4，您的理解大体上是正确的，并进行了一些小的更正:

Read and parse HTTP headers
if not successful:
    throw error
if response can contain message body:
    if HTTP version is 1.1+ and Transfer-encoding is not identity:
        while true:
            read line, extract delimited ASCII hexadecimal, the chunk size
            if not successful:
                throw error
             if chunk size is 0:
                break while loop
             read chunk size number of bytes
        read and parse trailing HTTP headers
    else if Content-Length is specified:
        read Content-Length number of bytes
    else if Content-Type is "multipart/byteranges":
        read and parse MIME-encoded chunks until terminating MIME boundary is reached
    else:
        read until connection is closed