koa-ln

Koa middleware for logging requests using ln

Installation

npm install koa-ln 

Usage

 
const Koa = require('koa');
const logger = require('koa-ln');
 
const app = new Koa();
 
app.use(logger.access());
app.use(logger.app());
 
app.use(ctx => {
    ctx.logger.info("hello world");
    ctx.body = "hello world";
})
app.listen(80)

Options

• name {string}

name of the logger, defaults to app/access

• type {"file" | "console"}

log type, defaults to console

• dateFormat {string}

date format of the log's filename, defaults to YYYY-MM-DD

• format {string| Function}

log body format , defaults to ":remote-addr :method :http-version :url :referrer :content-length :user-agent :status :request-time :body-bytes"

• formatter {Function}

function to convert the json data to string

• json {boolean}

use json log , defaults to false

• level {"trace" | "debug" | "info" | "warn" | "error" | "fatal"}

log level, defaluts to info

• path {string}

log file path, it is required when opts.type is file

example

const Koa = require('koa');
const logger = require('koa-ln');
 
const app = new Koa();
 
app.use(logger.access({type: "file", path: "./logs/"}));
//app.use(logger.access({format: ":url :method :request-time :[cookie-item] :[header-item]"}))
//app.use(logger.access({filter: /\.(js|html|css)$/}))
app.use(logger.app({type: "file", path: "./logs/", level: "debug"}));
 
app.use(ctx => {
    ctx.logger.debug("hello world");
    ctx.body = "hello world";
})
app.listen(80)

access.2016-04-18.log

2016-04-18 10:50:50.819 - INFO - access - 908 - ::ffff:127.0.0.1 - GET - HTTP/1.1 - /koa-ln - http://127.0.0.1 - 0Bytes - Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.75 Safari/537.36 - 404 - 12.90ms - 9Bytes

app.2016-04-18.log

2016-04-18 10:50:50.902 - DEBUG - app - 908 - hello world

dynamic level

change the log level dynamically

const Koa = require('koa');
const logger = require('koa-ln');
 
const app = new Koa();
 
app.use(logger.access({type: "file", path: "./logs/"}));
app.use(logger.app({type: "file", path: "./logs/"}));
 
app.use(ctx => {
    ctx.logger.info('info log');
    ctx.logger.debug("debug log");
    ctx.logger.trace("trace log");
    ctx.body = "hello world";
})
app.listen(80);
 
setTimeout(() => {
    app.context.logLevel = "debug";
},10000);
 
setTimeout(() => {
    app.context.logLevel = "trace";
},20000);