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<title>read (DataTable)</title>
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<body class="standalone-code">
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<pre><span class="ruby-comment cmt"># File lib/data_table.rb, line 140</span>
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<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">read</span>
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<span class="ruby-keyword kw">if</span>(<span class="ruby-identifier">location</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp re">/ecogrid/</span>)
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<span class="ruby-comment cmt">#we need to pull out the docid and do a read on metacat</span>
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<span class="ruby-comment cmt">#get self.location, and pull out the string after the last "/"</span>
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<span class="ruby-identifier">uri</span> = <span class="ruby-constant">URI</span>.<span class="ruby-identifier">parse</span>(<span class="ruby-constant">PATH_TO_METACAT</span>)
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<span class="ruby-identifier">uri</span>.<span class="ruby-identifier">query</span> = <span class="ruby-node">"action=read&qformat=xml&docid=#{docid}"</span>
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<span class="ruby-comment cmt"># Use Net:HTTP first to get the content_type</span>
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<span class="ruby-identifier">http</span> = <span class="ruby-constant">Net</span><span class="ruby-operator">::</span><span class="ruby-constant">HTTP</span>.<span class="ruby-identifier">start</span>(<span class="ruby-identifier">uri</span>.<span class="ruby-identifier">host</span>, <span class="ruby-identifier">uri</span>.<span class="ruby-identifier">port</span>)
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<span class="ruby-identifier">http</span>.<span class="ruby-identifier">request_get</span>(<span class="ruby-identifier">uri</span>.<span class="ruby-identifier">to_s</span>) <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">response</span><span class="ruby-operator">|</span>
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<span class="ruby-keyword kw">if</span>(<span class="ruby-identifier">response</span>.<span class="ruby-identifier">content_type</span> <span class="ruby-operator">==</span> <span class="ruby-value str">'text/xml'</span>)
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<span class="ruby-comment cmt"># error message</span>
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<span class="ruby-identifier">doc</span> = <span class="ruby-constant">REXML</span><span class="ruby-operator">::</span><span class="ruby-constant">Document</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">response</span>.<span class="ruby-identifier">read_body</span>)
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<span class="ruby-keyword kw">if</span>(<span class="ruby-identifier">doc</span>.<span class="ruby-identifier">root</span>.<span class="ruby-identifier">name</span> <span class="ruby-operator">==</span> <span class="ruby-value str">'error'</span>)
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<span class="ruby-identifier">raise</span> <span class="ruby-identifier">doc</span>.<span class="ruby-identifier">root</span>.<span class="ruby-identifier">text</span>
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<span class="ruby-keyword kw">else</span>
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<span class="ruby-identifier">raise</span> <span class="ruby-node">"Unrecognized response from metacat at #{PATH_TO_METACAT}"</span>
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<span class="ruby-keyword kw">end</span>
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<span class="ruby-keyword kw">elsif</span>(<span class="ruby-identifier">response</span>.<span class="ruby-identifier">content_type</span> <span class="ruby-operator">==</span> <span class="ruby-value str">'text/plain'</span>)
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<span class="ruby-identifier">response</span>.<span class="ruby-identifier">read_body</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">f</span><span class="ruby-operator">|</span>
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<span class="ruby-keyword kw">yield</span> <span class="ruby-identifier">f</span>
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<span class="ruby-keyword kw">end</span>
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<span class="ruby-keyword kw">else</span>
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<span class="ruby-identifier">raise</span> <span class="ruby-node">"Unrecognized content type \"#{response.content_type}\" "</span> <span class="ruby-operator">+</span>
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<span class="ruby-node">"from metacat at #{PATH_TO_METACAT}"</span>
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<span class="ruby-keyword kw">end</span>
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<span class="ruby-keyword kw">end</span>
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<span class="ruby-keyword kw">elsif</span>(<span class="ruby-identifier">location</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp re">/http/</span>)
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<span class="ruby-identifier">uri</span> = <span class="ruby-constant">URI</span>.<span class="ruby-identifier">parse</span>(<span class="ruby-identifier">location</span>)
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<span class="ruby-identifier">http</span> = <span class="ruby-constant">Net</span><span class="ruby-operator">::</span><span class="ruby-constant">HTTP</span>.<span class="ruby-identifier">start</span>(<span class="ruby-identifier">uri</span>.<span class="ruby-identifier">host</span>, <span class="ruby-identifier">uri</span>.<span class="ruby-identifier">port</span>)
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<span class="ruby-identifier">http</span>.<span class="ruby-identifier">request_get</span>(<span class="ruby-identifier">uri</span>.<span class="ruby-identifier">to_s</span>) <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">response</span><span class="ruby-operator">|</span>
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<span class="ruby-identifier">response</span>.<span class="ruby-identifier">read_body</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">f</span><span class="ruby-operator">|</span>
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<span class="ruby-keyword kw">yield</span> <span class="ruby-identifier">f</span>
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<span class="ruby-keyword kw">end</span>
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<span class="ruby-keyword kw">end</span>
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<span class="ruby-keyword kw">else</span>
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<span class="ruby-identifier">raise</span> <span class="ruby-value str">'Unknown location for dataTable'</span>
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<span class="ruby-keyword kw">end</span>
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<span class="ruby-keyword kw">end</span></pre>
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