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       webtool  -  WebTool  is a tool used to simplify the implementation of web based tools with


       WebTool makes it easy to use web based  tools  with  Erlang/OTP.  WebTool  configures  and
       starts the webserver httpd.


       start()-> {ok,Pid}| {stop,Reason}

              Start  WebTool  with default data, i.e. port 8888, ip-number, and server-
              name localhost. If port 8888 is in use, port 8889 is tried instead. If 8889 is also
              in use, 8890 is tried and so on. Max number of ports tried is 256.

              The mime.types file and WebTool's own HTML files are assumed to be in the directory



                 Path = string() | standard_path
                 Data = [Port,Address,Name] | PortNumber | standard_data
                 Port = {port,PortNumber}
                 Address = {bind_address,IpNumber}
                 Name = {server_name,ServerName}
                 PortNumber = integer()
                 IpNumber = tuple(), e.g. {127,0,0,1}
                 ServerName = string()
                 Pid = pid()

              Use this function to start WebTool if the  default  port,  ip-number,servername  or
              path can not be used.

              Path  is  the  directory where the mime.types file and WebTool's own HTML files are
              located. By default this is webtool-<vsn>/priv, and in most cases there is no  need
              to change this. If Path is set to standard_path the default will be used.

              If  Data  is  set  to  PortNumber,  the  default  data  will  be used for ip-number
              ( and server name (localhost).


              Stop WebTool and the tools started by WebTool.



                 Module = atom()

              Debug a WebTool application by tracing all functions in the given module which  are
              called from WebTool.


              Stop the tracing started by debug_app/1, and format the trace log.


       The  following  callback  function must be implemented by each web based tool that will be
       used via WebTool. When started, WebTool searches the Erlang code path for *.tool files  to
       locate  all web based tools and their callback functions. See the WebTool User's Guide for
       more information about the *.tool files.


       Module:Func(Data)-> {Name,WebData}|error


                 Data = term()
                 Name = atom()
                 WebData = [WebOptions]
                 WebOptions = LinkData | Alias | Start
                 LinkData = {web_data,{ToolName,Url}}
                 Alias = {alias,{VirtualPath,RealPath}} | {alias,{erl_alias,Path,[Modules]}
                 Start = {start,StartData}
                 ToolName = Url = VirtualPath = RealPath = Path = string()
                 Modules = atom()
                 StartData = AppData | ChildSpec | Func
                 AppData = {app,AppName}
                 ChildSpec = {child,child_spec()}
                   See the Reference Manual for the module supervisor in the  STDLIB  application
                   for details about child_spec().
                 Func = {func,{StartMod,StartFunc,StartArg}, {StopMod,StopFunc,StopArg}}
                 AppName = StartMod = StartFunc = StopMod = StopFunc =atom()
                 StartArg = StopArg = [term()]

              This is the configuration function (config_func) which must be stated in the *.tool

              The function is called by WebTool at startup to retrieve the data needed  to  start
              and configure the tool. LinkData is used by WebTool to create the link to the tool.
              Alias is used to create the aliases needed by the webserver. Start is used to start
              and stop the tool.


       start_webtool(1), WebTool User's Guide