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import {AuthenticateFn, AuthenticationBindings} from '@loopback/authentication';
import {inject} from '@loopback/context';
import {ExpressRequestHandler, FindRoute, InvokeMethod, InvokeMiddleware, ParseParams, Reject, RequestContext, RestBindings, Send, SequenceHandler} from '@loopback/rest';
import cors from 'cors';
import requestIp from 'request-ip';
import * as winston from 'winston';
import {failureHandler} from './controllers/components';
import {LoggerServiceBindings} from './keys';
// import * as winston from 'winston';
// import {LoggerServiceBindings} from './keys';
const middlewareList: ExpressRequestHandler[] = [
cors(),
requestIp.mw()
];
const SequenceActions = RestBindings.SequenceActions;
export class MySequence implements SequenceHandler {
/**
* Optional invoker for registered middleware in a chain.
* To be injected via SequenceActions.INVOKE_MIDDLEWARE.
*/
@inject(SequenceActions.INVOKE_MIDDLEWARE, {optional: true})
protected invokeMiddleware: InvokeMiddleware = () => true;
constructor(
@inject(SequenceActions.FIND_ROUTE) protected findRoute: FindRoute,
@inject(SequenceActions.PARSE_PARAMS) protected parseParams: ParseParams,
@inject(SequenceActions.INVOKE_METHOD) protected invoke: InvokeMethod,
@inject(SequenceActions.SEND) public send: Send,
@inject(SequenceActions.REJECT) public reject: Reject,
@inject(AuthenticationBindings.AUTH_ACTION) protected authenticateRequest: AuthenticateFn,
@inject(LoggerServiceBindings.LOGGER_SERVICE) public logger: winston.Logger,
) { }
async handle(context: RequestContext) {
const {request, response, name} = context;
try {
const entryTime = Date.now();
const finished = await this.invokeMiddleware(context, middlewareList);
Iif (finished) return;
await this.trackEntry(request, name);
const route = this.findRoute(request);
// call authentication action
await this.authenticateRequest(request);
const args = await this.parseParams(request, route);
const result = await this.invoke(route, args);
const exitTime = Date.now();
const responseTime = exitTime - entryTime;
await this.trackExit(request, name, responseTime);
this.send(response, result);
} catch (err: any) {
let code = err.code || 422
failureHandler(response, code, err)
}
}
async trackEntry(request: any, name: String,): Promise<void | boolean> {
console.log(request.url)
Iif (request.url === "/")
return true
const logData = {ip: request.clientIp, api: request.url, message: `Track Entry Log`};
this.logger.info(logData);
return true
}
async trackExit(request: any, name: String, responseTime: Number,): Promise<void | boolean> {
Iif (request.url === "/")
return true
const logData = {ip: request.clientIp, api: request.url, responseTime, message: `Track Exit Log`, };
this.logger.info(logData);
return true
}
}
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