类型错误:将圆形结构转换为 JSON -->从构造函数“ClientRequest"的对象开始 [英] TypeError: Converting circular structure to JSON --> starting at object with constructor 'ClientRequest'

问题描述

我是 nest.js 的初学者，我正在尝试用我的代码实现 Axios，但发生了这个错误，我想修复它.

I am a nest.js beginner and I am trying to implement Axios with my code and this error occurs and I would like to fix it.

    --> starting at object with constructor 'ClientRequest'
    |     property 'socket' -> object with constructor 'Socket'
    --- property '_httpMessage' closes the circle +188941ms
TypeError: Converting circular structure to JSON
    --> starting at object with constructor 'ClientRequest'
    |     property 'socket' -> object with constructor 'Socket'
    --- property '_httpMessage' closes the circle
    at JSON.stringify (<anonymous>)
    at stringify (D:CUSportcomplex-registersso-reg
ode_modulesexpresslib
esponse.js:1123:12)
    at ServerResponse.json (D:CUSportcomplex-registersso-reg
ode_modulesexpresslib
esponse.js:260:14)
    at ExpressAdapter.reply (D:CUSportcomplex-registersso-reg
[e-mail]:24:57)
    at RouterResponseController.apply (D:CUSportcomplex-registersso-reg
ode_modules@nestjscore
outer
outer-response-controller.js:13:36)
    at D:CUSportcomplex-registersso-reg
ode_modules@nestjscore
outer
outer-execution-context.js:173:48
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at async D:CUSportcomplex-registersso-reg
ode_modules@nestjscore
outer
outer-execution-context.js:47:13
    at async D:CUSportcomplex-registersso-reg
ode_modules@nestjscore
outer
outer-proxy.js:9:17

这是我的 app.service.ts

This is my app.service.ts

async validateSSO(appticket): Promise<SsoContent> {
        let instance = axios.create({
            baseURL: "http://localhost:8080/",
            headers: {
                'DeeAppId': config.DeeAppId,
                'DeeAppSecret': config.DeeAppSecret,
                'DeeTicket': appticket
            }
        });
        instance.get("/serviceValidation")
            .then(response => {
                this.ssoContent = response;
            })
            .catch(error => {
                return (error);
            });

        return this.ssoContent;

    }

这是我的 app.controller.ts

and this is my app.controller.ts

    @Get('validation/:appticket')
    async validateSSO(
        @Param('appticket') appticket: string
        //DeeAppTicket is sented via Front-end
    ): Promise<SsoContent> {
        return this.registeringService.validateSSO(appticket);
    }

谢谢你的帮助:)

推荐答案

首先，nest.js 为您提供开箱即用的 HttpService，您可以通过 DI 注入它:https://docs.nestjs.com/techniques/http-module

First of all nest.js provides you HttpService out of the box that you may inject it through DI: https://docs.nestjs.com/techniques/http-module

第二 - 您正在尝试存储整个响应对象，该对象是复杂的数据结构并包含错误消息中所述的循环依赖项(TypeError:将循环结构转换为 JSON)

Second - you are trying to store whole response object which is complex data structure and contains circular dependencies as it stated in error message (TypeError: Converting circular structure to JSON)

你应该做的是要么映射你需要的数据，而不是存储整个圆形对象，

What you should do is either you map the data you need instead of storing whole circular object,

或者您应该查找一些可以解析循环 json 的库:https://www.npmjs.com/package/flatted

or you should look up to some libs that could parse circular json: https://www.npmjs.com/package/flatted

这篇关于类型错误:将圆形结构转换为 JSON -->从构造函数“ClientRequest"的对象开始的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！