Changing HTTP status message using Sinatra

问题

I'm writing a simple Sinatra app, and given a user posts a request with an specific data, I want to return an error '453' (custom error code) with a message CLIENT_ERROR, or something similar.

The problem is: looking into the Sinatra documentation and doing some testing I couldn't find a way to setup the response error message, only the response status.

So, if a set the Sinatra response

get '/' do
   response.status = 453
end

I get the error code right:

curl -v localhost:4567

* About to connect() to localhost port 4567 (#0)
*   Trying 127.0.0.1... connected
> GET / HTTP/1.1
> User-Agent: curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1 zlib/1.2.3.4     libidn/1.23 librtmp/2.3
> Host: localhost:4567
> Accept: */*
> 
< HTTP/1.1 453 
< X-Frame-Options: sameorigin
< X-XSS-Protection: 1; mode=block
< Content-Type: text/html;charset=utf-8
< Content-Length: 0
< Connection: keep-alive
< Server: thin 1.3.1 codename Triple Espresso
< 
* Connection #0 to host localhost left intact
* Closing connection #0

But what I want to have is:

< HTTP/1.1 453 CLIENT_ERROR

The same way I have

< HTTP/1.1 200 OK

When everything goes according to the plan.

Is there anyway to do this using Sinatra/Rack?

回答1:

The status message is generated by the server you are using, e.g. in Thin the messages are in Thin::HTTP_STATUS_CODES and the reponse line is generated in Thin::Response, and in WEBrick they are in WEBrick::HHTPStatus::StatusMessage and the response is generated in WEBrick::HTTPResponse.

If you know what server you are using, you could add your error to the appropriate hash.

With Thin:

require 'thin'
Thin::HTTP_STATUS_CODES[453] = "Client Error"

and the output:

$ curl -v localhost:4567
* About to connect() to localhost port 4567 (#0)
*   Trying 127.0.0.1... connected
* Connected to localhost (127.0.0.1) port 4567 (#0)
> GET / HTTP/1.1
> User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8r zlib/1.2.3
> Host: localhost:4567
> Accept: */*
> 
< HTTP/1.1 453 Client Error
< X-Frame-Options: sameorigin
< X-XSS-Protection: 1; mode=block
< Content-Type: text/html;charset=utf-8
< Content-Length: 0
< Connection: keep-alive
< Server: thin 1.4.1 codename Chromeo
< 
* Connection #0 to host localhost left intact
* Closing connection #0

and with WEBrick:

require 'webrick'
WEBrick::HTTPStatus::StatusMessage[453] = "Client Error"

which gives the output:

$ curl -v localhost:4567
* About to connect() to localhost port 4567 (#0)
*   Trying 127.0.0.1... connected
* Connected to localhost (127.0.0.1) port 4567 (#0)
> GET / HTTP/1.1
> User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8r zlib/1.2.3
> Host: localhost:4567
> Accept: */*
> 
localhost - - [13/Aug/2012:01:41:48 BST] "GET / HTTP/1.1" 453 0
- -> /
< HTTP/1.1 453 Client Error 
< X-Frame-Options: sameorigin
< X-Xss-Protection: 1; mode=block
< Content-Type: text/html;charset=utf-8
< Content-Length: 0
< Server: WEBrick/1.3.1 (Ruby/1.9.3/2012-04-20)
< Date: Mon, 13 Aug 2012 00:41:48 GMT
< Connection: Keep-Alive
< 
* Connection #0 to host localhost left intact
* Closing connection #0

回答2:

I would recommend not to use custom HTTP status codes. If you think you have something of general use, consider writing an Internet Draft and going through the IETF specification process.

来源：https://stackoverflow.com/questions/11926823/changing-http-status-message-using-sinatra

标签

ruby

http

sinatra

rack

http-status