Mhttpd: Difference between revisions

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== Purpose ==
The midas documentation has moved. The new documentation about the mhttpd web server is in:
The <span style="color:darkcyan;">''mhttpd''</span> utility runs the MIDAS [[Web Server]] which allows the user to communicate with the experiment. It is used for run control.
* [https://midas.triumf.ca/docs/develop/reference/reference/programs/#mhttpd mhttpd] on the Programs and options page (command-line options)
 
* [https://midas.triumf.ca/docs/develop/features/core_system/web/ Web interface: overview] (connecting and the built-in pages)
 
* [https://midas.triumf.ca/docs/develop/features/deployment/security/#web-security Web security] on the Security page (access from other computers, proxies and SSL)
 
== Arguments ==
 
    -p port  : port number e.g. 8081 (no default)
  [-h] : connect to midas server (mserver) on given host
  [-e] : experiment to connect to
  [-v] : display verbose HTTP communication
  [-D] : starts program as a daemon
  [-E] : only display ELog system
  [-H] : only display history plots
  [-a] : only allow access for specific host(s). Several [-a Hostname] statements might be given
  [-help] : display usage information
 
== Usage ==
 
  The TCP/IP port number is '''required''' as an argument in order to listen to the web-based request.
 
  mhttpd -p port [-h Hostname] [-e Experiment]  [-v] [-D] [-c] [-a Hostname]
  e.g.
  mhttpd -p 8081 -D
 
=== Features ===
As mentioned, <span style="color:darkcyan;">''mhttpd''</span> provide a mean for run control which include the monitoring of the run parameters as well.
Its main feature is a web paged invoked through any web browser accessing the Midas experimental URL at a defined port.
The content of this "Midas status page" is composed with the minimal information relative to the experiment and a collection of buttons and links to further describe and control the configuration of the experiment.
 
* Minimal display (main web page)
** Experiment name, time & date, page refresh rate
** Buttons (see below)
** User defined buttons
** run comments and condition display section (if enabled)
** Equipment list with current running condition, number of event received, event rate, data rate for each equipment.
** Data logging statistics (number of event recorded, data size recorder, compression factor, usage storage level) if enabled.  
** Secondary Data logging (data mover) with statistics if enabled.
** Single line of the most recent Midas message.
** Table of the current applications connected to this experiment.
 
* Buttons
** Transition the state of the run (stopped/running/paused), allows if setup to enter user running condition parameters at the start state.
** Access to the full [[Online Database]] for data display and/or data content modification.
** Display the [[Midas Messages]]. These messages are generated by the Midas system as well as the user using cm_msg() functions.
** Access to [[ELOG]]" site. "Short-cut" switch to the predefined "electronic logbook".
** Access to the [[Alarms]] section for monitoring the different type of alarms (evaluated, programs, internals, periodic).
** Access to the [[Program]] section for a status or interaction with the current running applications part of the Midas experiment.
** Access to the [[History]] for graphical data representation of any ODB variables and acquired data.
** Access to the Midas Slow Control Bus devices [[MSCB]] connected to this experiment.
** Access to the run [[Sequencer]] control/monitoring page for interactive loading/saving/running of a run sequence based on any ODB parameters.
** Short-cut to the Midas [[Help]] documentation resource.
* Links
** links to all the listed equipments invoking a dedicated page for the display and possible control of the equipment parameters.
** link to the logger configuration (if present) for the data recording.
** link to the possible secondary logging configuration parameters (if present).
 
=== Multiple copies ===
Several copies of  <span style="color:darkcyan;">''mhttpd''</span>  can run on a single host, as long as they are started on different ports.
 
If more than one experiment runs on the same host, a server for each experiment must be started on a different port, e.g.
          mhttpd -e midas -p 8081 -D
          mhttpd -e midgas -p 8082 -D

Latest revision as of 22:01, 30 October 2026

The midas documentation has moved. The new documentation about the mhttpd web server is in:

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