resting-squirrel-es-logger
v1.0.3
Published
ElasticSearch logger for Resting Squirrel apps.
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resting-squirrel-es-logger
ElasticSearch logger for Resting Squirrel apps.
Requirements
- Node.js >= 8
- ElasticSearch 7
Installation
npm install resting-squirrel-es-logger --save
Usage
import rs from 'resting-squirrel'; // peer dependency
import logger from 'resting-squirrel-es-logger';
const app = rs({
logger: logger(/* options */),
});
app.start();
Options
appName: string - Name of the application. Default: RS App
clearTemplate: boolean - Indicates if the ES template is deleted before the logger init. Default: false
getCustomData: (property: string, loggerData: ILoggerData) => any - Function to get the value of custom property. Default: null
indexTimeFormat: string - Time format from moment
for the index suffix. Default: YYYY-MM-DD
node: string - ES node. Default: http://localhost:9200
onError: (error: any) => void - Function called if some error occurs. Default: null
onReady: () => void - Function called if the logger is ready. Default: null
template: Template - Template data. Default: { name: 'rs-es-logger', numberOfReplicas: 0, numberOfShards: 1, properties: {} }
transformBody: (property: string, value: any) => any - Function to transform property value before the save in the request body. Default: null
transformQuery: (property: string, value: any) => any - Function to transform property value before the save in the request query. Default: null
Template
name: string - Name of the template. Default: rs-es-logger
numberOfReplicas: number - Number of replicas. Default: 0
numberOfShards: number - Number of shards. Default: 1
properties: { [key: string]: any } - Custom template properties for custom data. Default: {}
Transforms
Data in body and query can be transformed.
import logger from 'resting-squirrel-es-logger';
logger({
transformBody(property, value) {
switch (property) {
case 'password':
return '********'; // We really don't want to have passwords in database
case 'profile_picture': // The picture is in base64
return `[file(${value?.length})]`; // We don't want to save large data to database
default:
return value;
}
},
});
Custom data
Custom data can be indexed as well. It should be the data for further searches.
import logger from 'resting-squirrel-es-logger';
logger({
template: {
properties: {
userId: {
type: 'integer',
},
},
},
getCustomData(property, { headers }) {
// Logger doesn't have access to the incoming request so we have to store the userId to the headers in auth middleware
switch (property) {
case 'userId':
// After that we can access userId from headers and save it
return headers?.userId || null;
default:
return null;
}
},
});