NestJS 在 GraphQL 解析器中获取使用 JWT 进行身份验证的当前用户

使用 JWT（JSON Web Token）进行身份验证是一种常见的安全机制，在许多应用程序中被广泛采用。在使用NestJS构建GraphQL解析器时，我们可以使用JWT来验证当前用户的身份。本文将介绍如何在NestJS的GraphQL解析器中获取使用JWT进行身份验证的当前用户，并提供一个案例代码来演示。

npm install @nestjs/jwt passport-jwt

typescript
import { JwtModule } from '@nestjs/jwt';
@Module({
  imports: [
    JwtModule.register({
      secret: 'your-secret-key',
      signOptions: { expiresIn: '1d' },
    }),
  ],
})
export class AppModule {}

typescript
import { Resolver, Query, Context } from '@nestjs/graphql';
import { JwtService } from '@nestjs/jwt';
@Resolver()
export class UserResolver {
  constructor(private jwtService: JwtService) {}
  @Query()
  getCurrentUser(@Context() context) {
    const { req } = context;
    const token = req.headers.authorization.split(' ')[1];
    const decodedToken = this.jwtService.verify(token);
    const currentUser = decodedToken.user;
    return currentUser;
  }
}

typescript
import { Module } from '@nestjs/common';
import { JwtModule } from '@nestjs/jwt';
import { GraphQLModule } from '@nestjs/graphql';
import { JwtService } from '@nestjs/jwt';
import { Resolver, Query, Context } from '@nestjs/graphql';
@Module({
  imports: [
    GraphQLModule.forRoot({
      autoSchemaFile: true,
    }),
    JwtModule.register({
      secret: 'your-secret-key',
      signOptions: { expiresIn: '1d' },
    }),
  ],
})
export class AppModule {}
@Resolver()
export class UserResolver {
  constructor(private jwtService: JwtService) {}
  @Query()
  getCurrentUser(@Context() context) {
    const { req } = context;
    const token = req.headers.authorization.split(' ')[1];
    const decodedToken = this.jwtService.verify(token);
    const currentUser = decodedToken.user;
    return currentUser;
  }
}