520 Web Server Returned an Unknown Error

Cloudflare specific error. The origin server returned an empty, unknown, or unexpected response.

When and Why to Use It

Cloudflare specific error. The origin server returned an empty, unknown, or unexpected response.

Usage Examples

Shokupan (Functional)

import { HttpException, get } from 'shokupan';

export const getResource = get('/resource', () => {
    throw new HttpException('Web Server Returned an Unknown Error', 520);
});

Shokupan (Controller)

import { Controller, Get, HttpException } from 'shokupan';

@Controller('/api')
export class ExampleController {
    @Get('/resource')
    getResource() {
        throw new HttpException('Web Server Returned an Unknown Error', 520);
    }
}

Express

import express from 'express';
const app = express();

app.get('/resource', (req, res) => {
    res.status(520).json({ error: 'Web Server Returned an Unknown Error' });
});

Nest

import { Controller, Get, HttpException } from '@nestjs/common';

@Controller('api')
export class ExampleController {
  @Get('resource')
  getResource() {
    throw new HttpException('Web Server Returned an Unknown Error', 520);
  }
}

Koa

import Koa from 'koa';
const app = new Koa();

app.use(async ctx => {
  if (ctx.path === '/resource' && ctx.method === 'GET') {
    ctx.status = 520;
    ctx.body = { error: 'Web Server Returned an Unknown Error' };
  }
});