When is an HTTP response finished?

Question

I am writing a simple HTTP client in .NET for learning purposes. I am using the .NET Socket class, which ultimately uses Winsock. I do not want to use the WebRequest, HttpWe

Answer 1

Your understanding is mostly correct, with some minor corrections, per RFC 2616 Section 4.4:

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

Answer 2

You should look at http://greenbytes.de/tech/webdav/draft-ietf-httpbis-p1-messaging-24.html#message.body.length (if this doesn't answer your question then please send back to the Working Group).