HTTP路径必须以斜杠开头吗？ [英] Do HTTP paths have to start with a slash?

问题描述

我对HTTP格式有疑问。 HTTP请求的第一行如下所示：

  GET /path/to/resource.txt HTTP / 1.1 
  

或换句话说：

  METHOD URI HTTP-VERSION 
  

是否需要 URI 以 / 字符开头，以便 /path/to/resource.txt 与路径/到/ resource.txt 相同，两者都有效吗？

如果是领先 / 不是必需的，是 GET / HTTP / 1.1 和 GET HTTP / 1.1 也一样吗？ （ GET 和 HTTP / 1.1 之间的两个空格）

解决方案

请参阅 RFC 7230，第5.3节请求目标：

获得入站连接后，客户端发送带有请求的HTTP
请求消息（第3节） -target派生自
目标URI。请求目标有四种不同的格式，
取决于所请求的方法和请求
是否代理。

  request-target = origin-form 
 / absolute-form 
 / authority-form 
 / asterisk-form 
  

你在谈论原型，在 5.3.1小节：

当直接向源服务器发出请求时，除了
CONNECT或服务器范围的OPTIONS请求（如下所述），客户端
必须只发送目标$ b的绝对路径和查询组件$ b URI作为请求目标。 如果目标URI的路径组件为
为空，则客户端必须发送/作为
request-target的原始格式内的路径。主机头字段也是发送，如
第5.4节中所定义。

例如，希望检索标识为

的
资源的表示的客户

  http://www.example.org/where?q=now 
   
 
 
将打开（或重复使用）与主机www.example.org的端口80的TCP 
连接并发送
行：
  GET / where？q = now HTTP / 1.1 
主持人：www.example.org 
  
 
 

早期在第2.7节为

  absolute-path = 1 *（/segment）
  

所以是的，需要一些目标标识符，路径始终以斜杠为前缀，如果未知，空或不适用，则为 / 。

I have a question regarding the HTTP format. The first line of a HTTP request looks something like this:

GET /path/to/resource.txt HTTP/1.1

or in other words:

METHOD URI HTTP-VERSION

Is it required that the URI starts with the / character so that /path/to/resource.txt would be the same as path/to/resource.txt and both are valid?

And if a leading / is not required, are GET / HTTP/1.1 and GET HTTP/1.1 the same too? (two spaces between GET and HTTP/1.1)

解决方案

See RFC 7230, section 5.3 Request target:

Once an inbound connection is obtained, the client sends an HTTP request message (Section 3) with a request-target derived from the target URI. There are four distinct formats for the request-target, depending on both the method being requested and whether the request is to a proxy.

request-target = origin-form
                / absolute-form
                / authority-form
                / asterisk-form

You're talking about origin-form, described in subsection 5.3.1:

When making a request directly to an origin server, other than a CONNECT or server-wide OPTIONS request (as detailed below), a client MUST send only the absolute path and query components of the target URI as the request-target. If the target URI's path component is empty, the client MUST send "/" as the path within the origin-form of request-target. A Host header field is also sent, as defined in Section 5.4.

For example, a client wishing to retrieve a representation of the resource identified as

http://www.example.org/where?q=now

directly from the origin server would open (or reuse) a TCP connection to port 80 of the host "www.example.org" and send the lines:

GET /where?q=now HTTP/1.1
 Host: www.example.org

And an "absolute path" is defined earlier in section 2.7 as

 absolute-path = 1*( "/" segment )

So yes, some target identifier is required, the path is always prefixed with a slash, and if unknown, empty or inapplicable, it is /.

这篇关于HTTP路径必须以斜杠开头吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！