Deno 反向代理解决前端跨域问题以及将 http 转为 https

This topic created in 1293 days ago, the information mentioned may be changed or developed.

前端在调用别人 api 时经常遇到跨域或者 https 无法调用 http 的问题，通过反代即可解决。 deno.com 提供免费的 NodeJS 环境，在其官网后台新建应用，在 playground 粘贴代码：

import { serve } from "https://deno.land/[email protected]/http/server.ts"
serve(async (req: Request) => {
  const url = new URL(req.url)
  const targetUrl = url.href.replace(`${url.origin}/`, '')
  let urlObj: any
  try {
    urlObj = new URL(targetUrl)
  } catch (e) {
    console.error(e.message)
  }
  if (['http:', 'https:'].indexOf(urlObj?.protocol) > -1) {
    let res = await fetch(targetUrl, {
      headers: req.headers,
      method: req.method,
      body: req.body,
    })
    let headers = {}
    res.headers.forEach((value, key) => {
      headers[key] = value
    })
    if ('*' !== headers['Access-Control-Allow-Origin']?.trim()
      && '*' !== headers['access-control-allow-origin']?.trim()) {
      headers['Access-Control-Allow-Origin'] = '*'
    }
    return new Response(res.body, { headers, status: res.status })
  }
  return new Response(
    `Usage: ${url.origin}/https://deno.com/deploy/docs/pricing-and-limits`)
})

13 replies • 2022-11-19 13:18:51 +08:00