4log 中文文档教程
4log 
行、HTTP 响应和错误记录器
Install
$ npm install --save 4log
Usage
const log = require('4log')('ctrl:index');
log.msg('unicorns');
// Format: [datetime] [pid] type who "message"
// => [12/Sep/2016:11:56:51 +0500] [74640] MSG ctrl:index "unicorns"
log.err(new Error('foobar'));
// Format: [datetime] [pid] type who "message" "stack"
// => [12/Sep/2016:09:53:28 +0300] [74640] ERR ctrl:index "ERROR: index returned tuples in wrong order" "Error: ERROR: index returned tuples in wrong order >> >> at Client._readError (/node_modules/pg-native/index.js:80:13) >> at Client._read (/node_modules/pg-native/index.js:121:19) >> at PQ.emit (events.js:104:17)"
log.res(res);
// format: [datetime] [pid] type who IP "method url" status "message" "request_id"
// => [12/Sep/2016:11:34:00 +0300] [74640] RES ctrl:index 2a02:6b8:0:1625::6 "GET /v1/locations/foobar" 404 "Unsupported location" "7b5f10be25e111b2483f2b7e856feeac"
API
log(name[, outStream[, errStream]])
name
类型：String
Logger 实例的名称。
outStream
类型：流
默认值：stdout
MSG 和 RES 日志的可写流。
errStream
类型：流
默认值：stderr
ERR 日志的可写流。
log.msg(str[, arg1[, arg2,[ … argN]]])
str
类型：String
日志字符串。 它可能包含格式化程序 %s 或 %d 类似于 console.log
log.err(err)
err
类型：错误
log.res(res[, err])
res
类型：响应
快速响应。
err
类型：Error
用于记录响应错误的错误。
License
麻省理工学院 © Maxim Ponomarev
4log
Line, HTTP Response and Error logger
Install
$ npm install --save 4log
Usage
const log = require('4log')('ctrl:index');
log.msg('unicorns');
// Format: [datetime] [pid] type who "message"
// => [12/Sep/2016:11:56:51 +0500] [74640] MSG ctrl:index "unicorns"
log.err(new Error('foobar'));
// Format: [datetime] [pid] type who "message" "stack"
// => [12/Sep/2016:09:53:28 +0300] [74640] ERR ctrl:index "ERROR: index returned tuples in wrong order" "Error: ERROR: index returned tuples in wrong order >> >> at Client._readError (/node_modules/pg-native/index.js:80:13) >> at Client._read (/node_modules/pg-native/index.js:121:19) >> at PQ.emit (events.js:104:17)"
log.res(res);
// format: [datetime] [pid] type who IP "method url" status "message" "request_id"
// => [12/Sep/2016:11:34:00 +0300] [74640] RES ctrl:index 2a02:6b8:0:1625::6 "GET /v1/locations/foobar" 404 "Unsupported location" "7b5f10be25e111b2483f2b7e856feeac"
API
log(name[, outStream[, errStream]])
name
Type: String
Name of the Logger instance.
outStream
Type: Stream
Default: stdout
Writable stream for MSG and RES logs.
errStream
Type: Stream
Default: stderr
Writable stream for ERR logs.
log.msg(str[, arg1[, arg2,[ … argN]]])
str
Type: String
Sting for log. It may contain formatters %s or %d similar to console.log
log.err(err)
err
Type: Error
log.res(res[, err])
res
Type: Response
Express Response.
err
Type: Error
Error for logging response error.
License
MIT © Maxim Ponomarev
