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+# Sleep Webservice Utilities
+#
+# To use this: 
+#    include('webservice.sl');
+#
+#    debug(7 | 34) highly recommended
+#
+# Functions:
+#             
+# $ post("url", %hash)        
+#    connects to "url", posts the data in the hash, returns a handle for reading
+#
+# % buildDataStructure("<xml>...</xml>");
+#    creates a sleep hash tree from the XML document.  each node in the hash is:
+#    name => string       : tagname
+#    text => string       : raw content of the tag (may be a bunch of spaces)
+#    attributes => hash   : attributes for the tag
+#    children => array    : an array of nodes (with this same structure)
+#
+# childrenToHash(%element)
+#    constructs a hash out of an element's children... uses the tagnames for the
+#    keys and each element for the values.
+#
+# walkData(%data, %functions)
+#    walks through %data, calls the function held by %functions["tagName"] when
+#    a tag is encountered.  Argument $1 to the function is the current node.
+#    uses a postorder traversal; children left to right, parent
+#
+# printNice(%data);
+#    pretty prints a sleep hash tree
+#
+# Dependencies:
+#
+#    This code assumes the following jars are in your Java classpath:
+#
+#    commons-codec-1.2.jar        - http://archive.apache.org/dist/commons/codec/
+#    commons-httpclient-3.1.jar   - http://hc.apache.org/downloads.cgi
+#    commons-logging-api.jar      - http://archive.apache.org/dist/commons/logging/binaries/
+#    commons-logging.jar          - http://archive.apache.org/dist/commons/logging/binaries/
+#    jdom.jar                     - http://www.jdom.org
+#
+# Contact:
+#
+#    Raphael Mudge (rsmudge@gmail.com)
+#
+# Release 15 Jul 08
+#
+
+import org.apache.commons.httpclient.HttpClient;
+import org.apache.commons.httpclient.HttpStatus;
+import org.apache.commons.httpclient.methods.PostMethod;
+
+import sleep.bridges.io.IOObject;
+
+import org.jdom.*;
+import org.jdom.input.*;
+
+sub post
+{
+   local('$client $method $key $value $code');
+   $client = [new HttpClient];    
+   $method = [new PostMethod: $1];
+
+   foreach $key => $value ($2)
+   {
+      [$method addParameter: $key, $value];
+   }
+
+   $code = [$client executeMethod: $method];
+
+   if ($code != [HttpStatus SC_OK])
+   {
+      throw "Method failed: " . [$method getStatusLine];
+   }
+
+   return [SleepUtils getIOHandle: [$method getResponseBodyAsStream], $null];
+}
+
+sub buildDataStructure
+{
+   local('$builder $doc $buffer');
+
+   $buffer  = allocate(strlen($1));
+   writeb($buffer, $1);
+   closef($buffer);
+
+   $builder = [new SAXBuilder];
+   $doc     = [$builder build: [$buffer getInputStream]];
+
+   closef($buffer);
+
+   return [{
+      local('$child %result');
+
+      %result["name"] = [$1 getName];
+      %result["text"] = [$1 getText];
+      %result["attributes"] = [{
+         local('$attr %result');
+
+         foreach $attr ([SleepUtils getArrayWrapper: $1])
+         {
+            %result[[$attr getName]] = [$attr getValue];
+         }
+
+         return %result;
+      }: [$1 getAttributes]];     
+
+      %result["children"] = @();
+
+      foreach $child ([SleepUtils getArrayWrapper: [$1 getChildren]])
+      {
+         push(%result["children"], [$this: $child]);
+      }
+
+      return %result;
+   }: [$doc getRootElement]];
+}
+
+sub walkData
+{
+   local('$child');
+
+   foreach $child ($1["children"])
+   {
+      walkData($child, $2);
+   }
+
+   invoke($2, @($1), $1["name"]);
+}
+
+sub childrenToHash
+{
+   local('$child %results');
+
+   foreach $child ($1["children"])
+   {
+      %results[$child["name"]] = $child["text"];
+   }
+
+   return %results;
+}
+
+sub printNice   
+{
+   local('$k $v $2');
+
+   if (-isarray $1)
+   {
+      foreach $k => $v ($1)
+      {
+         println("$2 $+ $k $+ :");
+         printNice($v, "$2   ");
+      }
+   }
+   else if (-ishash $1)
+   {
+      foreach $k => $v ($1)
+      {
+         println("$2 $+ $k $+ :"); 
+         printNice($v, "$2   ");
+      }
+   }
+   else
+   {
+      println("$2 $+ $1"); 
+   }
+}