addon java-server

This commit is contained in:
gaoshuaixing
2022-12-14 19:58:13 +08:00
parent b68ad22699
commit 8f2eac0b6e
10 changed files with 546 additions and 99 deletions

View File

@@ -0,0 +1,257 @@
var ChildProcess = require("child_process");
var IS_WIN = process.platform === "win32";
var TableParser = require("table-parser");
/**
* End of line.
* Basically, the EOL should be:
* - windows: \r\n
* - *nix: \n
* But i'm trying to get every possibilities covered.
*/
var EOL = /(\r\n)|(\n\r)|\n|\r/;
var SystemEOL = require("os").EOL;
/**
* Execute child process
* @type {Function}
* @param {String[]} args
* @param {String} where
* @param {Function} callback
* @param {Object=null} callback.err
* @param {Object[]} callback.stdout
*/
var Exec = function (args, where) {
var spawnSync = ChildProcess.spawnSync;
var execSync = ChildProcess.execSync;
// on windows, if use ChildProcess.exec(`wmic process get`), the stdout will gives you nothing
// that's why I use `cmd` instead
if (IS_WIN) {
const cmd = `wmic process where ${where} get ProcessId,ParentProcessId,CommandLine \n`;
const result = execSync(cmd);
if (!result) {
throw new Error(result);
}
var stdout = result.toString();
var beginRow;
stdout = stdout.split(EOL);
// Find the line index for the titles
stdout.forEach(function (out, index) {
if (
out &&
typeof beginRow == "undefined" &&
out.indexOf("CommandLine") === 0
) {
beginRow = index;
}
});
// get rid of the start (copyright) and the end (current pwd)
stdout.splice(stdout.length - 1, 1);
stdout.splice(0, beginRow);
return stdout.join(SystemEOL) || false;
} else {
if (typeof args === "string") {
args = args.split(/\s+/);
}
const result = spawnSync("ps", args);
if (result.stderr && !!result.stderr.toString()) {
throw new Error(result.stderr);
} else {
return result.stdout.toString();
}
}
};
/**
* Query Process: Focus on pid & cmd
* @param query
* @param {String|String[]} query.pid
* @param {String} query.command RegExp String
* @param {String} query.arguments RegExp String
* @param {String|array} query.psargs
* @param {String|array} query.where where 条件
* @param {Function} callback
* @param {Object=null} callback.err
* @param {Object[]} callback.processList
* @return {Object}
*/
exports.lookup = function (query) {
/**
* add 'lx' as default ps arguments, since the default ps output in linux like "ubuntu", wont include command arguments
*/
var exeArgs = query.psargs || ["lx"];
var where = query.where || 'name="javaw.exe"';
var filter = {};
var idList;
// Lookup by PID
if (query.pid) {
if (Array.isArray(query.pid)) {
idList = query.pid;
} else {
idList = [query.pid];
}
// Cast all PIDs as Strings
idList = idList.map(function (v) {
return String(v);
});
}
if (query.command) {
filter["command"] = new RegExp(query.command, "i");
}
if (query.arguments) {
filter["arguments"] = new RegExp(query.arguments, "i");
}
if (query.ppid) {
filter["ppid"] = new RegExp(query.ppid);
}
const result = Exec(exeArgs, where);
var processList = parseGrid(result);
var resultList = [];
processList.forEach(function (p) {
var flt;
var type;
var result = true;
if (idList && idList.indexOf(String(p.pid)) < 0) {
return;
}
for (type in filter) {
flt = filter[type];
result = flt.test(p[type]) ? result : false;
}
if (result) {
resultList.push(p);
}
});
return resultList;
};
/**
* Kill process
* @param pid
* @param {Object|String} signal
* @param {String} signal.signal
* @param {number} signal.timeout
* @param next
*/
exports.kill = function (pid, signal, next) {
//opts are optional
if (arguments.length == 2 && typeof signal == "function") {
next = signal;
signal = undefined;
}
var checkTimeoutSeconds = (signal && signal.timeout) || 30;
if (typeof signal === "object") {
signal = signal.signal;
}
try {
process.kill(pid, signal);
} catch (e) {
return next && next(e);
}
var checkConfident = 0;
var checkTimeoutTimer = null;
var checkIsTimeout = false;
function checkKilled(finishCallback) {
exports.lookup({ pid: pid }, function (err, list) {
if (checkIsTimeout) return;
if (err) {
clearTimeout(checkTimeoutTimer);
finishCallback && finishCallback(err);
} else if (list.length > 0) {
checkConfident = checkConfident - 1 || 0;
checkKilled(finishCallback);
} else {
checkConfident++;
if (checkConfident === 5) {
clearTimeout(checkTimeoutTimer);
finishCallback && finishCallback();
} else {
checkKilled(finishCallback);
}
}
});
}
next && checkKilled(next);
checkTimeoutTimer =
next &&
setTimeout(function () {
checkIsTimeout = true;
next(new Error("Kill process timeout"));
}, checkTimeoutSeconds * 1000);
};
/**
* Parse the stdout into readable object.
* @param {String} output
*/
function parseGrid(output) {
if (!output) {
return [];
}
return formatOutput(TableParser.parse(output));
}
/**
* format the structure, extract pid, command, arguments, ppid
* @param data
* @return {Array}
*/
function formatOutput(data) {
var formatedData = [];
data.forEach(function (d) {
var pid =
(d.PID && d.PID[0]) || (d.ProcessId && d.ProcessId[0]) || undefined;
var cmd = d.CMD || d.CommandLine || d.COMMAND || undefined;
var ppid =
(d.PPID && d.PPID[0]) ||
(d.ParentProcessId && d.ParentProcessId[0]) ||
undefined;
if (pid && cmd) {
var command = cmd[0];
var args = "";
if (cmd.length > 1) {
args = cmd.slice(1);
}
formatedData.push({
pid: pid,
command: command,
arguments: args,
ppid: ppid,
});
}
});
return formatedData;
}