fix: Proxy configuration improvements

src/whatsapp/controllers/proxy.controller.ts

@@ -1,4 +1,7 @@
+import axios from 'axios';
+
 import { Logger } from '../../config/logger.config';
+import { BadRequestException } from '../../exceptions';
 import { InstanceDto } from '../dto/instance.dto';
 import { ProxyDto } from '../dto/proxy.dto';
 import { ProxyService } from '../services/proxy.service';
@@ -13,7 +16,16 @@ export class ProxyController {
 
     if (!data.enabled) {
       logger.verbose('proxy disabled');
-      data.proxy = '';
+      data.proxy = null;
+    }
+
+    if (data.proxy) {
+      logger.verbose('proxy enabled');
+      const { host, port, protocol, username, password } = data.proxy;
+      const testProxy = await this.testProxy(host, port, protocol, username, password);
+      if (!testProxy) {
+        throw new BadRequestException('Invalid proxy');
+      }
     }
 
     return this.proxyService.create(instance, data);
@@ -23,4 +35,36 @@ export class ProxyController {
     logger.verbose('requested findProxy from ' + instance.instanceName + ' instance');
     return this.proxyService.find(instance);
   }
+
+  private async testProxy(host: string, port: string, protocol: string, username?: string, password?: string) {
+    logger.verbose('requested testProxy');
+    try {
+      let proxyConfig: any = {
+        host: host,
+        port: parseInt(port),
+        protocol: protocol,
+      };
+
+      if (username && password) {
+        proxyConfig = {
+          ...proxyConfig,
+          auth: {
+            username: username,
+            password: password,
+          },
+        };
+      }
+      const serverIp = await axios.get('http://meuip.com/api/meuip.php');
+
+      const response = await axios.get('http://meuip.com/api/meuip.php', {
+        proxy: proxyConfig,
+      });
+
+      logger.verbose('testProxy response: ' + response.data);
+      return response.data !== serverIp.data;
+    } catch (error) {
+      logger.error('testProxy error: ' + error);
+      return false;
+    }
+  }
 }