HTTP请求至少需要什么？ [英] What, at the bare minimum, is required for an HTTP request?

问题描述

我正在尝试使用 netcat 向我的本地服务器发出GET命令，执行以下操作：

I'm trying to issue a GET command to my local server using netcat by doing the following:

echo -e "GET / HTTP/1.1\nHost: localhost" | nc localhost 80

不幸的是，我收到 HTTP / 1.1 400 Bad Request 对此的回应。 HTTP请求至少需要什么？

Unfortunately, I get a HTTP/1.1 400 Bad Request response for this. What, at the very minimum, is required for a HTTP request?

推荐答案

它必须使用CRLF行结尾，并且必须以 \\\\ nn结尾\\ r \\ n ，即一个空行。这就是我使用的：

It must use CRLF line endings, and it must end in \r\n\r\n, i.e. a blank line. This is what I use:

printf 'GET / HTTP/1.1\r\nHost: www.example.com\r\nConnection: close\r\n\r\n' |
  nc www.example.com 80

此外，我更喜欢 printf over echo ，我添加了一个额外的标头让服务器关闭连接，但不需要那些。

Additionally, I prefer printf over echo, and I add an extra header to have the server close the connection, but those aren’t needed.

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