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what does require("child_process") actually do?


what does require("child_process") actually do?

By : user2948605
Date : November 14 2020, 04:51 PM
This might help you Requiring modules can sometimes initialize the module, so don't feel bad about not knowing. They are all different. However, child_process does not create a process simply by requiring the module as you have done. You have to call either fork() or spawn() (or exec()) to actually create a new process (and PID).
If you look at the documentation you can see how sometimes they will use this syntax:
code :
var spawn = require('child_process').spawn;
// ...
spawn('ps', ['ax']);
// foo.js
module.exports = function() {
    return "bar";
};
var mymodule = require("foo");
var result = mymodule(); // <-- this calls the function returned via module.exports
console.log(result); // "bar"


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{"error":{"message":"Services require JSON-RPC","code":0,"origin":2},&

{"error":{"message":"Services require JSON-RPC","code":0,"origin":2},&


By : George F.
Date : March 29 2020, 07:55 AM
wish of those help JSON RPC expects the client to send parameters to the server using an HTTP POST command with the procedure parameters in the post data. When you type a URL into the browser it sends an HTTP GET command, which doesn't send any parameters.
RPC is intended for use by application programs, not directly by end users. See http://json-rpc.org/ for more details about it.
Require nodejs "child_process" with TypeScript, SystemJS and Electron

Require nodejs "child_process" with TypeScript, SystemJS and Electron


By : akm11
Date : March 29 2020, 07:55 AM
seems to work fine Ok, after some research #L138 I have found the solution
You can use import as before
code :
import * as child from 'child_process';

var foo: child.ChildProcess = child.exec('foo.sh');
console.log(typeof foo.on);
System.config({
  map: {
    'child_process': '@node/child_process'
  }
});
NativeScript: require('child_process') gives an error when running "tns run ios --emulator"

NativeScript: require('child_process') gives an error when running "tns run ios --emulator"


By : Viktor Miller
Date : March 29 2020, 07:55 AM
hope this fix your issue The child_process that you are seeing is a wrapper in the NativeScript CLI for Node's child_process.
There is no child_process in NativeScript as the concept is not relevant in mobile environments (Android/iOS). The reason Node JS works cross-platform for example, is because its engine has analogous feature implementation (file-system, http, child process) for each of the supported platforms.
behavior with "require-session-token = true" and "require-authentication="anonymous-all" attrib

behavior with "require-session-token = true" and "require-authentication="anonymous-all" attrib


By : Prabhakar Krishna
Date : March 29 2020, 07:55 AM
With these it helps As no one answer this questions, I suppose it is the designed in purpose. Though you do post RESTful call which should be stateless on the server, you will have to provide the api_key or authtenticaiton information in the http request in order to get rid of the ' Session token required (in moquiSessionToken) ...' message.
how to get textual stdout from console.log(require("child_process").execSync('ls'))?

how to get textual stdout from console.log(require("child_process").execSync('ls'))?


By : Rajesh Ashtaputre
Date : March 29 2020, 07:55 AM
around this issue How to print the stdout from console.log(require("child_process").execSync('ls')) , Your last line should be:
code :
console.log(child_process_1.execSync('ls -la').toString());
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