Mhttpd.js
About
mhttpd.js contains javascript function wrappers for most MIDAS AJAX functions typically used for implementing interactive custom pages for MIDAS experiments.
AJAX is a set of web development techniques used to construct interactive web applications:
mhttpd.js is typically served by mhttpd from $MIDASSYS/resources/mhttpd.js
<html> <head> ... <script src='mhttpd.js'></script> ... </head> ... </html>
A mostly up to date copy of mhttpd.js is linked here:
- http://ladd00.triumf.ca/~daqweb/doc/midas/resources/mhttpd.js
- https://bitbucket.org/tmidas/midas/src/HEAD/resources/mhttpd.js?at=develop
An example for using all mhttpd.js functions is included in the MIDAS distribution under examples/javascript1:
- http://ladd00.triumf.ca/~daqweb/doc/midas/examples/javascript1/
- http://ladd00.triumf.ca/~daqweb/doc/midas/examples/javascript1/example.html
MIDAS AJAX functions can be accessed directly without using mhttpd.js wrappers (i.e. using the JSON-P script-tag method)
- AJAX - MIDAS AJAX functions
Functions
Helper functions:
- function getMouseXY(e)
- function XMLHttpRequestGeneric()
- function ODBExtractRecord(record, key)
- function ODBEdit(path)
- function ODBFinishInlineEdit(...)
- function ODBInlineEditKeydown(...)
- function ODBInlineEdit(...)
ODB access functions:
- function ODBSet(path, value, pwdname)
- function ODBGet(path, format, defval, len, type)
- function ODBMGet(paths, callback, formats)
- function ODBGetRecord(path)
- function ODBKey(path)
- function ODBCopy(path, format)
- function ODBMCopy(paths, callback, format)
MIDAS access functions:
- function ODBRpc_rev0(name, rpc, args)
- function ODBRpc_rev1(name, rpc, max_reply_length, args)
- function ODBGetMsg(n)
- function ODBGenerateMsg(m)
- function ODBGetAlarms()
Summary table
| Function | XML | JSON | JSON-P | async | AJAX |
| ODBSet(path, value, pwdname) | no | no | no | no | cmd=jset |
| ODBGet(path, format, defval, len, type) | no | no | no | no | cmd=jget |
| ODBMGet(paths, callback, formats) | no | no | no | yes | cmd=jget |
| ODBGetRecord(path) | ? | ? | ? | no | cmd=jget |
| ODBKey(path) | no | yes | no | no | cmd=jkey |
| ODBCopy(path, format) | yes | yes | yes | no | cmd=jcopy |
| ODBMcopy(paths, callback, format) | yes | yes | yes | yes | cmd=jcopy |
| ODBRpc_rev0(name, rpc, args) | no | no | no | no | cmd=jrpc_rev0 |
| ODBRpc_rev1(name, rpc, max_reply_length, args) | no | no | no | no | cmd=jrpc_rev1 |
| ODBRpc(...) | yes | yes | yes | yes | cmd=jrpc |
| ODBGetMsg(n) | no | no | no | no | cmd=jmsg |
| ODBGenerateMsg(m) | no | no | no | no | cmd=jgenmsg |
| ODBGetAlarms() | no | no | no | no | cmd=jalm |
ODBSet
ODBGet
ODBMGet
ODBKey
(doc incomplete)
Usage:
var key = new ODBKey("/Equipment/RpcExample/Variables/SLOW");
Returns a javascript object with data fields corresponding to the data fields of MIDAS KEY (midas.h):
{"name":"SLOW","type":"TID_DOUBLE","num_values":"3","item_size":"8","last_written":"1376633931"}
ODBCopy
Usage:
var data_json = ODBCopy("/Equipment/RpcExample/Variables", "json");
var obj = JSON.parse(data_json);
document.getElementById('json_data0').innerHTML = obj.SLOW[0];
Return value:
{
"SLOW/key" : { "type" : 10, "num_values" : 3, "last_written" : 1376634320 },
"SLOW" : [ 2357, 1376634320, -8.6602540236010100e+01 ]
}
ODBMCopy
AAA