40 lines
1.1 KiB
TypeScript
40 lines
1.1 KiB
TypeScript
import {
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CanActivate,
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ExecutionContext,
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Injectable,
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UnauthorizedException,
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} from '@nestjs/common';
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import { JwtService } from '@nestjs/jwt';
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import { JWT_SECRET } from '../consts';
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import { AuthUser } from './auth.service';
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@Injectable()
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export class AuthGuard implements CanActivate {
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constructor(private jwtService: JwtService) {}
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async canActivate(context: ExecutionContext): Promise<boolean> {
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const request = context.switchToHttp().getRequest();
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const token = this.extractTokenFromHeader(request);
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if (!token) {
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throw new UnauthorizedException();
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}
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try {
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const payload = await this.jwtService.verifyAsync(token, {
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secret: JWT_SECRET,
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});
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// 💡 We're assigning the payload to the request object here
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// so that we can access it in our route handlers
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request['user'] = payload as AuthUser;
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} catch {
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throw new UnauthorizedException();
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}
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return true;
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}
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private extractTokenFromHeader(request: Request): string | undefined {
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const [type, token] =
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(request.headers as any).authorization?.split(' ') ?? [];
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return type === 'Bearer' ? token : undefined;
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}
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}
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