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f1c3b6d76f
Simplify the interface for most cowboy_req functions. They all return a single value except the four body reading functions. The reply functions now only return a Req value. Access functions do not return a Req anymore. Functions that used to cache results do not have a cache anymore. The interface for accessing query string and cookies has therefore been changed. There are now three query string functions: qs/1 provides access to the raw query string value; parse_qs/1 returns the query string as a list of key/values; match_qs/2 returns a map containing the values requested in the second argument, after applying constraints and default value. Similarly, there are two cookie functions: parse_cookies/1 and match_cookies/2. More match functions will be added in future commits. None of the functions return an error tuple anymore. It either works or crashes. Cowboy will attempt to provide an appropriate status code in the response of crashed handlers. As a result, the content decode function has its return value changed to a simple binary, and the body reading functions only return on success. |
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POST parameter echo example
To try this example, you need GNU make and git in your PATH.
To build the example, run the following command:
$ make
To start the release in the foreground:
$ ./_rel/echo_post_example/bin/echo_post_example console
As this example echoes a POST parameter, it is a little more
complex to test. Some browsers feature tools that allow you
to perform one such request, or you can use the command line
tool curl as we will demonstrate.
Example output
$ curl -i -d echo=echomeplz http://localhost:8080
HTTP/1.1 200 OK
connection: keep-alive
server: Cowboy
date: Fri, 28 Sep 2012 04:12:36 GMT
content-length: 9
content-type: text/plain; charset=utf-8
echomeplz