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<title>read (Metacat)</title>
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<pre><span class="ruby-comment cmt"># File lib/metacat.rb, line 199</span>
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<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">read</span>(<span class="ruby-identifier">docid</span>, <span class="ruby-identifier">options</span> = {}, <span class="ruby-operator">&</span><span class="ruby-identifier">block</span>) <span class="ruby-comment cmt"># :yields: xml or data_table fragment</span>
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<span class="ruby-identifier">data</span> = {
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<span class="ruby-value str">'action'</span> =<span class="ruby-operator">></span> <span class="ruby-value str">'read'</span>,
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<span class="ruby-value str">'qformat'</span> =<span class="ruby-operator">></span> <span class="ruby-value str">'xml'</span>,
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<span class="ruby-value str">'docid'</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">docid</span>
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}
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<span class="ruby-identifier">metacat_get</span>(<span class="ruby-identifier">data</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-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-keyword kw">if</span>(<span class="ruby-identifier">doc</span>.<span class="ruby-identifier">root</span>.<span class="ruby-identifier">text</span>.<span class="ruby-identifier">match</span>(<span class="ruby-value str">'permission'</span>))
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<span class="ruby-identifier">raise</span> <span class="ruby-constant">MetacatPermissionDenied</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">elsif</span>(<span class="ruby-identifier">doc</span>.<span class="ruby-identifier">root</span>.<span class="ruby-identifier">text</span>.<span class="ruby-identifier">match</span>(<span class="ruby-value str">'does not exist'</span>))
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<span class="ruby-comment cmt"># Nothing found, return nil</span>
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<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</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">'Unrecognized response from metacat: '</span><span class="ruby-operator">+</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">end</span>
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<span class="ruby-keyword kw">else</span> <span class="ruby-comment cmt"># xml data</span>
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<span class="ruby-keyword kw">return</span> <span class="ruby-identifier">doc</span>
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<span class="ruby-keyword kw">end</span>
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<span class="ruby-keyword kw">else</span> <span class="ruby-comment cmt"># probably a data table</span>
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<span class="ruby-keyword kw">if</span> (<span class="ruby-identifier">options</span>.<span class="ruby-identifier">has_key?</span>(<span class="ruby-value str">'only_eml'</span>) <span class="ruby-operator">&&</span> <span class="ruby-identifier">options</span>[<span class="ruby-value str">'only_eml'</span>] <span class="ruby-operator">==</span> <span class="ruby-keyword kw">true</span>)
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<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</span>
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<span class="ruby-keyword kw">else</span>
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<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">block_given?</span>
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<span class="ruby-identifier">response</span>.<span class="ruby-identifier">read_body</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">buffer</span><span class="ruby-operator">|</span> <span class="ruby-keyword kw">yield</span> <span class="ruby-identifier">buffer</span> }
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<span class="ruby-keyword kw">else</span>
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<span class="ruby-identifier">response</span>.<span class="ruby-identifier">read_body</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">end</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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