Klog

A very simple script for error handling in NodeJS using promises.

Structure of return

• status (int) 0 is success (default = 0)
• warnings (int) number of warnings (default = 0)
• notices (int) number of notices (default = 0)
• fin (bool) true if 'done()' is sent (default = false)
• logs (array) all logs (default = [])
• data (object) data send in 'done({data})' (default = {})
• httpcode (int) generated by functions (default = 0)

Basic functions

|Command |HTTP code |Status |Fin | Notes | --- | --- | --- | --- | --- | |done(data) |200 | - |true |Sends data as data| |err(msg) |500 |1 |- |Logs "ERROR 500"+msg| |bad(msg) |400 |1 |- |Logs "ERROR 400"+msg| |forbid(msg) |403 |1 |- |Logs "ERROR 403"+msg| |toomany(msg) |429 |1 |- |Logs "ERROR 429"+msg|

Other functions

log(msg) adds "msg" to logs

warn(msg) adds "WARNING: msg" to logs and warnings++

note(msg) adds "NOTICE: msg" to logs and notices++

Example of use

const Klog = require("kasperware-klog")

async function handleit(id){
    return new Promise(async (resolve, reject) => {
	var k = new Klog();
	k.log("Running on ID: "+id);
	const search = await knex("posts").where("id", "=", id)
	.then(function(rows){
	    if(rows.length==0)
		    k.warn("No result on ID"+id);
	    }else if(rows.length==1){
		    const row = rows[0];
		    k.log("Found "+row);
		    resolve(k.done())
	    }else{
		    reject(k.err("Too many found!"))
	    }
	})
	.catch(function(err){
	    reject(k.err("Error in db: "+err));
	})
    })
}

router.get(["/endpoint/:id"], async function(req, res){
	if(req.params.id && isNumber(req.params.id)){
		const id = req.params.id;
		await handleit(id)
		.then(function(data){
			res.status(data.httpcode).send(data);
		})
		.catch(function(data){
			res.status(data.httpcode).send(data);
		});
	}else{
		var out = new Klog().bad("ID is not a number!")
		res.status(out.httpcode).send(out);
	}
})