MIDAS Javascript functions

This web page shows examples of how to use most MIDAS javascript and JSON-RPC functions. For more information, please read the MIDAS documentation: https://midas.triumf.ca/MidasWiki/index.php/Mhttpd.js

Index

mjsonrpc_set_url(url);
mjsonrpc_db_get_values(paths);
mjsonrpc_db_copy(paths);
mjsonrpc_db_paste(paths, values);
mjsonrpc_db_ls(paths); 
mjsonrpc_db_create(specs);
mjsonrpc_db_resize(paths, new_lengths);
test db_resize_string(paths, new_lengths, new_string_lengths);
mjsonrpc_db_key(paths);
test db_rename
test db_link
test db_reorder
mjsonrpc_db_delete(paths); 
mjsonrpc_cm_msg(message);
test cm_msg_facilities();
test cm_msg_retrieve(facility, time, min_messages);
test cm_exist()
test cm_shutdown()
test start_program()
test al_trigger_alarm()  
test al_reset_alarm()  
test get_alarms()
test jrpc()
test brpc()
ODBEdit(path);
        

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ODB functions:

mjsonrpc_db_create()

mjsonrpc_db_get_values()

JSON data:
db_get_values() status:
Runinfo/State:
Run number:
/Example/int:
/Example/int_array:
data age:

db_get_value() omit all optional information to reduce data size

JSON data:

mjsonrpc_db_copy()

JSON data:

mjsonrpc_db_paste()

mjsonrpc_db_ls()

RPC Status:
ls of /Equipment:
ls of /Example:
ls of non-existing directory:

mjsonrpc_db_resize()

db_resize_string()

mjsonrpc_db_key()

JSON data:

mjsonrpc_db_rename()

mjsonrpc_db_link()

mjsonrpc_db_reorder()

mjsonrpc_db_delete()

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Message functions

mjsonrpc_cm_msg()

Type in a message and press Enter. See the new message on the MIDAS "messages" page or press "Get MIDAS messages" button in the ODBGetMsg() section above.

cm_msg_facilities

list of messages facilities goes here

cm_msg_retrieve

number of messages goes here
list of messages goes here

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History functions

hs_get_active_events (hs_read_event_list)

list of active history events goes here

list of logger history channels

result of hs_reopen

list of history events goes here

list of history events goes here, channel MIDAS

list of history tags goes here

list of history last-written goes here

history data

binned history data

history data

binned history data

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Inline editor functions

ODBEdit()

Observe updated values in the ODBGet() section above. (Hint: press the "update now" button above)

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Programs control functions

Observe the effect of these functions on the MIDAS Programs page.

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Run control

Observe the effect of these functions on the MIDAS Status page and Messages page.

test cm_transition()

test cm_transition_status()

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Alarm functions

Observe the effect of these functions on the MIDAS Alarms page and Status page.

mjsonrpc_al_trigger_alarm()

mjsonrpc_al_reset_alarm()

mjsonrpc_get_alarms()

Alarms:

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mjsonrpc_jrpc() direct RPC from web page to frontend program

(note: frontend "fetest" should be running!) Also see the result of this function in the output of fetest and in MIDAS Messages.

JRPC reply:

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mjsonrpc_brpc() direct RPC from web page to frontend program

(note: frontend "fetest" should be running!) Also see the result of this function in the output of fetest and in MIDAS Messages.

BRPC reply:

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mhttpd special functions

Enable tracing of http requests:

MIDAS JSON RPC special functions and test cases

Test built-in functions:

Test json encoder and decoder:

Test error responses:

Test batch requests:

Test examples from mjsonrpc_user.cxx

test mjsonrpc_db_get_values() crash

test mjsonrpc_db_paste() array korner cases

test mjsonrpc_db_paste() values korner cases TID_BOOL /example/bool

test mjsonrpc_db_paste() values korner cases TID_INT /example/int

test mjsonrpc_db_paste() values korner cases TID_DWORD /example/dword

test mjsonrpc_db_paste() values korner cases TID_QWORD /example/qword

test mjsonrpc_db_paste() values korner cases TID_DOUBLE /example/double

test mjsonrpc_db_paste() values korner cases TID_FLOAT /example/float

Test nan and inf encoding

Test arraybuffer requests

Test modbset()

Test set and get e.innerHTML or enter: Span: test_innerHTML

mjsonrpc_get_schema()

JSON-RPC schema:

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Obsolete functions

ODBSet(path, value, pwdname); ---- use mjsonrpc_db_paste() instead
ODBGet(path, format, defval, len, type); ---- use ODBMCopy() instead ---- use mjsonrpc_db_get_values() instead
ODBMGet(paths, callback, formats); ---- use ODBMCopy() instead ---- use mjsonrpc_db_get_values() instead
ODBGetRecord(path); ---- use ODBMCopy() instead ---- use mjsonrpc_db_get_values() instead
ODBExtractRecord(record, key); ---- use ODBMCopy() instead ---- use mjsonrpc_db_get_values() instead
new ODBKey(path); ---- use ODBMKey() instead
ODBCopy(path, format); ---- use ODBMCopy() instead ---- use mjsonrpc_db_get_values() instead
ODBMCopy(paths, callback, format); ---- use mjsonrpc_db_get_values() instead
ODBMLs(paths, callback); ---- use mjsonrpc_db_ls() instead
ODBMCreate(paths, types); ---- use mjsonrpc_db_create() instead
ODBMCreate(paths, types, arraylengths, stringlengths, callback); ---- use mjsonrpc_db_create() instead
ODBMResize(paths, arraylengths, stringlengths, callback); ---- use mjsonrpc_db_resize() instead
ODBMRename(paths, names, callback);  ---- use RPC "db_rename"
ODBMLink(paths, links, callback);  ---- use RPC "db_link"
ODBMReorder(paths, indices, callback); ---- use RPC "db_reorder"
ODBMKey(paths, callback); ---- use mjsonrpc_db_key() instead
ODBMDelete(paths, callback); ---- use mjsonrpc_db_delete() instead
ODBRpc(name, command, args[, callback[, max_reply_length]]); ---- use RPC "jrpc"
ODBGenerateMsg(m); ---- use mjsonrpc_cm_msg() instead
ODBGetMsg(n); --- use RPC "cm_msg_retrieve"
ODBGetAlarms(); ---- use mjsonrpc_call("get_alarms")
        

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Example of periodic update

Last updated: never

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Last value