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POHow to properly check the HTTP response code in Ruby
 

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  1. POHow to properly check the HTTP response code in Ruby
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    <p>I am writing a gem that will serve as a REST API client for the service my company provides.</p> <p>For that, I have a <code>Channel</code> class that will serve as a means of interacting with the <code>/channels</code> path of the API. It uses <a href="https://github.com/jnunemaker/httparty" rel="nofollow"><code>HTTParty</code></a> for the actual HTTP calls. This class has a method called create, that POSTs a Channel instance with the required attributes.</p> <p>This is what the method looks like:</p> <pre><code>def create body = { external_id: external_id, name: name, description: description } action = post "/", body case action.response.class when Net::HTTPAccepted then return action when Net::HTTPNotAcceptable then raise HTTPNotAcceptable else raise "Server responded with " + Net::HTTPResponse::CODE_TO_OBJ[action.response.code].to_s end end </code></pre> <p>The <code>post</code> method is an abstraction that transforms the body hash into JSON and attaches authentication and other attributes to the actual <code>HTTParty</code> call. </p> <p>This does not work. Even when the response is a <code>202</code>, this <code>case</code> statement always falls on the <code>else</code> condition. I have attached a <code>pry</code> session after the <code>post</code> call to verify that the response was correct:</p> <pre><code> 38: def create 39: body = { external_id: external_id, 40: name: name, 41: description: description } 42: action = post "/", body =&gt; 43: case action.response.class 44: when Net::HTTPAccepted then return action 45: when Net::HTTPNotAcceptable then raise HTTPNotAcceptable 46: else raise "Server responded with " + Net::HTTPResponse::CODE_TO_OBJ[action.response.code].to_s 47: end 48: end [1] (pry) #&lt;ZynkApi::Channel&gt;: 0&gt; action.response.class =&gt; Net::HTTPAccepted </code></pre> <p>But it still falls on <code>else</code>:</p> <pre><code>[1] (pry) #&lt;ZynkApi::Channel&gt;: 0&gt; action.response.class =&gt; Net::HTTPAccepted [2] (pry) #&lt;ZynkApi::Channel&gt;: 0&gt; n From: /Users/cassiano/projects/Zynk/src/zynk_api/lib/zynk_api/channel.rb @ line 38 ZynkApi::Channel#create: 38: def create 39: body = { external_id: external_id, 40: name: name, 41: description: description } 42: action = post "/", body 43: case action.response.class 44: when Net::HTTPAccepted then return action 45: when Net::HTTPNotAcceptable then raise HTTPNotAcceptable =&gt; 46: else raise "Server responded with " + Net::HTTPResponse::CODE_TO_OBJ[action.response.code].to_s 47: end 48: end </code></pre>
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    1. USAndrew Marshall
    1. UScassianoleal
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    1. COreplace `case action.response.class` with `case action.response`, because class of class is a Class.
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      1. POHow to properly check the HTTP response code in Ruby
      1. UStaro
    2. COThanks, @taro. This works, but I'm still puzzled.. `action.response.class == Net::HTTPAccepted` returns `true`, while `action.response == Net::HTTPAccepted` returns `false`. What sort of comparison is `case .. when` doing, if not `==`?
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      1. POHow to properly check the HTTP response code in Ruby
      1. UScassianoleal
    3. COCase statement uses `===` operator, not `==`. You can read about that, for instance in this article: http://www.skorks.com/2009/08/how-a-ruby-case-statement-works-and-what-you-can-do-with-it/
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      1. POHow to properly check the HTTP response code in Ruby
      1. UStaro
 

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