pub enum RequestUri {
    AbsolutePath(String),
    AbsoluteUri(Url),
    Authority(String),
    Star,
}The Request-URI of a Request's StartLine.
From 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
Variants
AbsolutePath | The most common request target, an absolute path and optional query. 
For example, the line GET /where?q=now HTTP/1.1 would parse the URI
as AbsolutePath("/where?q=now".to_string()). 
 | 
AbsoluteUri | An absolute URI. Used in conjunction with proxies. 
When making a request to a proxy, other than a CONNECT or server-wide
OPTIONS request (as detailed below), a client MUST send the target
URI in absolute-form as the request-target. 
 
An example StartLine with an AbsoluteUri would be
GET http://www.example.org/pub/WWW/TheProject.html HTTP/1.1. 
 | 
Authority | The authority form is only for use with CONNECT requests. 
An example StartLine: CONNECT www.example.com:80 HTTP/1.1. 
 | 
Star | The star is used to target the entire server, instead of a specific resource. 
This is only used for a server-wide OPTIONS request. 
 | 
Trait Implementations
Derived Implementations