Disabled proxy for fetching PAC

Author: Rushabhshroff

android/.settings/org.eclipse.buildship.core.prefs

@@ -1,13 +1,13 @@
 arguments=
 auto.sync=false
 build.scans.enabled=false
-connection.gradle.distribution=GRADLE_DISTRIBUTION(VERSION(7.0-rc-1))
+connection.gradle.distribution=GRADLE_DISTRIBUTION(WRAPPER)
 connection.project.dir=
 eclipse.preferences.version=1
 gradle.user.home=
-java.home=/Library/Java/JavaVirtualMachines/zulu-11.jdk/Contents/Home
+java.home=
 jvm.arguments=
 offline.mode=false
-override.workspace.settings=true
-show.console.view=true
-show.executions.view=true
+override.workspace.settings=false
+show.console.view=false
+show.executions.view=false

ios/Classes/SwiftFlutterSystemProxyPlugin.swift

@@ -21,21 +21,12 @@ public class SwiftFlutterSystemProxyPlugin: NSObject, FlutterPlugin {
         let args = call.arguments as! NSDictionary
         let url = args.value(forKey:"url") as! String
         let host = args.value(forKey:"host") as! String
-        let PacUrl = proxyDict.value(forKey:"ProxyAutoConfigURLString") as! String
-        if let uri = URL(string: PacUrl) {
-        do {
-          let contents = try String(contentsOf: uri)
-          let jsEngine:JSContext = JSContext()
-          jsEngine.evaluateScript(contents)
-          let fn = "FindProxyForURL(\"" + url + "\",\""+host+"\")"
-          let proxy = jsEngine.evaluateScript(fn)
-          result(proxy?.toString())
-        } catch {
-          result("DIRECT")
-        }
-        } else {
-          result("DIRECT")
-        }
+        let js = args.value(forKey:"js") as! String
+        let jsEngine:JSContext = JSContext()
+        jsEngine.evaluateScript(js)
+        let fn = "FindProxyForURL(\"" + url + "\",\""+host+"\")"
+        let proxy = jsEngine.evaluateScript(fn)
+        result(proxy?.toString())
       }else{
         result("DIRECT")
       }

lib/flutter_system_proxy.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:convert';
 import 'dart:io';
 import 'package:flutter/services.dart';
 
@@ -32,7 +33,10 @@ class FlutterSystemProxy {
       return null;
     } else if (Platform.isIOS) {
       if (proxySettings["ProxyAutoConfigEnable"] == 1) {
-        return {"pacEnabled": "true"};
+        return {
+          "pacEnabled": "true",
+          "pacUrl": proxySettings['ProxyAutoConfigURLString']
+        };
       } else {
         if (isHttps) {
           if (proxySettings['HTTPSEnable'] == 1) {
@@ -65,9 +69,13 @@ class FlutterSystemProxy {
           (parsedProxy["host"] as String) +
           ":" +
           (parsedProxy["port"] as String);
-    } else if (parsedProxy != null && parsedProxy["pacEnabled"] == "true") {
-      String proxy =
-          await _channel.invokeMethod("executePAC", {"url": url, "host": host});
+    } else if (parsedProxy != null &&
+        parsedProxy["pacEnabled"] == "true" &&
+        parsedProxy["pacUrl"] != null) {
+      String pacLocation = parsedProxy["pacUrl"] as String;
+      String jsContents = await contents(pacLocation);
+      String proxy = await _channel.invokeMethod(
+          "executePAC", {"url": url, "host": host, "js": jsContents});
       return proxy;
     } else {
       return HttpClient.findProxyFromEnvironment(Uri.parse(url));
@@ -88,3 +96,15 @@ bool isPort(String? port) {
     return false;
   }
 }
+
+Future<String> contents(String url) async {
+  HttpClient client = new HttpClient();
+  var completor = new Completer<String>();
+  client.findProxy = null;
+  var request = await client.getUrl(Uri.parse(url));
+  var response = await request.close();
+  response.transform(utf8.decoder).listen((contents) {
+    completor.complete(contents);
+  });
+  return completor.future;
+}