Support of http proxy

[jimliang]

If I want to use http proxy，I will

 require('http').request({
    host:'127.0.0.1',
    port:8580,
    method:'POST',
    path:'https://www.google.com',
},function(res){
    //...
})

But I use node-fetch，

fetch(obj).then(function(res){
    ...
})

It throw TypeError: Parameter 'url' must be a string, not object

It does not support URL objects

[bitinn]

You can pass a http.Agent with custom proxy settings: https://github.com/bitinn/node-fetch#options

see also: #8 (comment)

[jimliang]

It resolved, I used https://github.com/TooTallNate/node-https-proxy-agent

fetch('https://www.google.com',{ agent:new HttpsProxyAgent('http://127.0.0.1:8580')}).then(function(res){
    ...
})

[jimliang]

use https://github.com/zjael/simple-proxy-agent to support more proxy type. http、socks5.

[lisonge]

It resolved, I used https://github.com/TooTallNate/node-https-proxy-agent

fetch('https://www.google.com',{ agent:new HttpsProxyAgent('http://127.0.0.1:8580')}).then(function(res){
    ...
})

i use typescript, and it type is incompatible

import { HttpProxyAgent } from 'http-proxy-agent';
import fetch from 'node-fetch';

fetch('', {
    method: 'GET',
    agent: new HttpProxyAgent('http://127.0.0.1:10809')
})

Type 'HttpProxyAgent' is not assignable to type 'Agent | ((parsedUrl: URL) => Agent) | undefined'. Property 'freeSockets' is missing in type 'HttpProxyAgent' but required in type 'Agent'.

[kics223w1]

You can use package tunnel to support node fetch with proxy.
Example Implement:

   const tunnel = require('tunnel');  
   const fetch = require('node-fetch');
   import fs from 'fs';
  
    const configTunnel = {
      ca: [fs.readFileSync(
      "YOUR_CERTIFICATE_PATH"
    )],
      proxy: {
        host: this.currentIP,
        port: proxyPort,
      },
    };

    const tunnelHTTPS = tunnel.httpsOverHttp(configTunnel);

    const tunnelHTTP = tunnel.httpOverHttp(configTunnel);

    let config: Record<string, any> = {
      url: flow.request.url,
      method: method,
      headers: headers,
      agent: flow.isSSL ? tunnelHTTPS : tunnelHTTP,
    };
    if (flow.request.bodySize > 0 && method !== 'GET' && method !== 'HEAD') {
      config.body = flow.request.body;
    }

   try {
      const response = await fetch(flow.request.url, config);
    } catch (e: any) {
      throw new Error(e.message);
    }

Note that: node fetch with proxy doesn't work if Method GET contains body.