+---[[
+Extract and split urlencoded data pairs, separated bei either "&" or ";"
+from given url or string. Returns a table with urldecoded values.
+
+Simple parameters are stored as string values associated with the parameter
+name within the table. Parameters with multiple values are stored as array
+containing the corresponding values.
+
+@class function
+@name urldecode_params
+@param url The url or string which contains x-www-urlencoded form data
+@param tbl Use the given table for storing values (optional)
+@return Table containing the urldecoded parameters
+@see urlencode_params
+]]
+
+---[[
+Encode each key-value-pair in given table to x-www-urlencoded format,
+separated by "&".
+
+Tables are encoded as parameters with multiple values by repeating the
+parameter name with each value.
+
+@class function
+@name urlencode_params
+@param tbl Table with the values
+@return String containing encoded values
+@see urldecode_params
+]]
+
+---[[
+Decode a mime encoded http message body with multipart/form-data Content-Type.
+
+Stores all extracted data associated with its parameter name
+in the params table within the given message object. Multiple parameter
+values are stored as tables, ordinary ones as strings.
+
+If an optional file callback function is given then it is feeded with the
+file contents chunk by chunk and only the extracted file name is stored
+within the params table. The callback function will be called subsequently
+with three arguments:
+ o Table containing decoded (name, file) and raw (headers) mime header data
+ o String value containing a chunk of the file data
+ o Boolean which indicates wheather the current chunk is the last one (eof)
+
+@class function
+@name mimedecode_message_body
+@param src Ltn12 source function
+@param msg HTTP message object
+@param filecb File callback function (optional)
+@return Value indicating successful operation (not nil means "ok")
+@return String containing the error if unsuccessful
+@see parse_message_header
+]]
+
+---[[
+Decode an urlencoded http message body with application/x-www-urlencoded
+Content-Type.
+
+Stores all extracted data associated with its parameter name in the params
+table within the given message object. Multiple parameter values are stored
+as tables, ordinary ones as strings.
+
+@class function
+@name urldecode_message_body
+@param src Ltn12 source function
+@param msg HTTP message object
+@return Value indicating successful operation (not nil means "ok")
+@return String containing the error if unsuccessful
+@see parse_message_header
+]]
+
+---[[
+Try to extract and decode a http message body from the given ltn12 source.
+This function will examine the Content-Type within the given message object
+to select the appropriate content decoder.
+
+Currently the application/x-www-urlencoded and application/form-data
+mime types are supported. If the encountered content encoding can't be
+handled then the whole message body will be stored unaltered as "content"
+property within the given message object.
+
+@class function
+@name parse_message_body
+@param src Ltn12 source function
+@param msg HTTP message object
+@param filecb File data callback (optional, see mimedecode_message_body())
+@return Value indicating successful operation (not nil means "ok")
+@return String containing the error if unsuccessful
+@see parse_message_header
+]]