如何在nestjs graphql中实现用户防护

Question

我试图获取当前用户，但在解析器中我未定义，在 jwt 策略中我使用令牌获取用户对象，但在解析器中用户未定义

授权卫士

import { ExecutionContext, Injectable } from '@nestjs/common';
import { AuthGuard } from '@nestjs/passport';
import { GqlExecutionContext } from '@nestjs/graphql';
import { AuthenticationError } from 'apollo-server-core';
import { ExecutionContextHost } from '@nestjs/core/helpers/execution-context-host';

@Injectable()
export class GqlAuthGuard extends AuthGuard('jwt') {

    canActivate(context: ExecutionContext) {
        const ctx = GqlExecutionContext.create(context);
        const { req } = ctx.getContext();

        return super.canActivate(
            new ExecutionContextHost([req]),
        );
    }

    handleRequest(err: any, user: any) {
        if (err || !user) {
            throw err || new AuthenticationError('GqlAuthGuard');
        }
        return user;
    }

}

用户装饰器

import {createParamDecorator} from '@nestjs/common';

export const CurrentUser = createParamDecorator(
    (data, req) =>  req.user )
;

应用程序模块

@Module({
  imports: [
      PassportModule.register({ defaultStrategy: 'jwt' }),
      JwtModule.register({
          signOptions: {
              expiresIn: 3600,
          },
      }),
      SharedModule,
      AuthModule,
      GraphQLModule.forRoot({
          autoSchemaFile: 'schema.gql',
          context: ({ req }) => ({ req })
      }),
      MongooseModule.forRoot(process.env.MONGO_URI,
        {
          useNewUrlParser: true ,
          useUnifiedTopology: true
        }),
    // RewardsModule,
    OrdersModule,
  ],
  controllers: [AppController],
  providers: [AppService],
})
export class AppModule {}

解析器

import {User} from "src/types/user";
import {GqlAuthGuard} from "../guards/graphql.auth.guard";

@Resolver()
export class OrdersResolver {
    constructor(
        private orderService: OrdersService
    ) {
    }

    @Query(returns => [Order])
    @UseGuards(GqlAuthGuard)
    listOrders(@CurrentUser() user: User): Promise<Order> {
        console.log(user)
        return this.orderService.listOrdersByUser(user.id);
    }

}

我还尝试实现此处解释的解决方案NestJS Get current user in GraphQL revered with JWT，但我仍然遇到了相同的错误

Answer 1

在 Nest v7 中，该createParamDecorator功能得到了更新。现在，而不是使用

export const CurrentUser = createParamDecorator(
    (data, req) =>  req.user )
;

你应该使用这样的东西：

export const User = createParamDecorator(
  (data: unknown, ctx: ExecutionContext) => {
    const gqlCtx = GqlExecutionContext.create(ctx);
    const request = gqlCtx.getContext().req;
    return request.user;
  },
);

为此，您还需要

context: ({req}) => ({req})

在你的GraphqlModule配置中。