Add socks proxy support to proxy feature

- Socks proxy support implemented.
- Monitor proxy agent create flow refactored
  and moved under proxy class.

Thanks for suggestion @thomasleveil

server/model/monitor.js

@@ -1,6 +1,4 @@
 const https = require("https");
-const HttpProxyAgent = require("http-proxy-agent");
-const HttpsProxyAgent = require("https-proxy-agent");
 const dayjs = require("dayjs");
 const utc = require("dayjs/plugin/utc");
 let timezone = require("dayjs/plugin/timezone");
@@ -13,6 +11,7 @@ const { tcping, ping, dnsResolve, checkCertificate, checkStatusCode, getTotalCli
 const { R } = require("redbean-node");
 const { BeanModel } = require("redbean-node/dist/bean-model");
 const { Notification } = require("../notification");
+const { Proxy } = require("../proxy");
 const { demoMode } = require("../config");
 const version = require("../../package.json").version;
 const apicache = require("../modules/apicache");
@@ -170,31 +169,13 @@ class Monitor extends BeanModel {
                         const proxy = await R.load("proxy", this.proxy_id);
 
                         if (proxy && proxy.active) {
-                            const httpProxyAgentOptions = {
-                                protocol: proxy.protocol,
-                                host: proxy.host,
-                                port: proxy.port,
-                            };
-                            const httpsProxyAgentOptions = {
-                                ...httpsAgentOptions,
-                                protocol: proxy.protocol,
-                                hostname: proxy.host,
-                                port: proxy.port,
-                            };
-
-                            if (proxy.auth) {
-                                httpProxyAgentOptions.auth = `${proxy.username}:${proxy.password}`;
-                                httpsProxyAgentOptions.auth = `${proxy.username}:${proxy.password}`;
-                            }
-
-                            debug(`[${this.name}] HTTP options: ${JSON.stringify({
-                                "http": httpProxyAgentOptions,
-                                "https": httpsProxyAgentOptions,
-                            })}`);
+                            const { httpAgent, httpsAgent } = Proxy.createAgents(proxy, {
+                                httpsAgentOptions: httpsAgentOptions,
+                            });
 
                             options.proxy = false;
-                            options.httpAgent = new HttpProxyAgent(httpProxyAgentOptions);
-                            options.httpsAgent = new HttpsProxyAgent(httpsProxyAgentOptions);
+                            options.httpAgent = httpAgent;
+                            options.httpsAgent = httpsAgent;
                         }
                     }
 

server/proxy.js

@@ -1,7 +1,13 @@
 const { R } = require("redbean-node");
+const HttpProxyAgent = require("http-proxy-agent");
+const HttpsProxyAgent = require("https-proxy-agent");
+const SocksProxyAgent = require("socks-proxy-agent");
+const { debug } = require("../src/util");
 
 class Proxy {
 
+    static SUPPORTED_PROXY_PROTOCOLS = ["http", "https", "socks", "socks5", "socks4"]
+
     /**
      * Saves and updates given proxy entity
      *
@@ -25,8 +31,11 @@ class Proxy {
         }
 
         // Make sure given proxy protocol is supported
-        if (!["http", "https"].includes(proxy.protocol)) {
-            throw new Error(`Unsupported proxy protocol "${proxy.protocol}. Supported protocols are http and https."`);
+        if (!this.SUPPORTED_PROXY_PROTOCOLS.includes(proxy.protocol)) {
+            throw new Error(`
+                Unsupported proxy protocol "${proxy.protocol}.
+                Supported protocols are ${this.SUPPORTED_PROXY_PROTOCOLS.join(", ")}."`
+            );
         }
 
         // When proxy is default update deactivate old default proxy
@@ -73,6 +82,68 @@ class Proxy {
         // Delete proxy from list
         await R.trash(bean);
     }
+
+    /**
+     * Create HTTP and HTTPS agents related with given proxy bean object
+     *
+     * @param proxy proxy bean object
+     * @param options http and https agent options
+     * @return {{httpAgent: Agent, httpsAgent: Agent}}
+     */
+    static createAgents(proxy, options) {
+        const { httpAgentOptions, httpsAgentOptions } = options || {};
+        let agent;
+        let httpAgent;
+        let httpsAgent;
+
+        const proxyOptions = {
+            protocol: proxy.protocol,
+            host: proxy.host,
+            port: proxy.port,
+        };
+
+        if (proxy.auth) {
+            proxyOptions.auth = `${proxy.username}:${proxy.password}`;
+        }
+
+        debug(`Proxy Options: ${JSON.stringify(proxyOptions)}`);
+        debug(`HTTP Agent Options: ${JSON.stringify(httpAgentOptions)}`);
+        debug(`HTTPS Agent Options: ${JSON.stringify(httpsAgentOptions)}`);
+
+        switch (proxy.protocol) {
+            case "http":
+            case "https":
+                httpAgent = new HttpProxyAgent({
+                    ...httpAgentOptions || {},
+                    ...proxyOptions
+                });
+
+                httpsAgent = new HttpsProxyAgent({
+                    ...httpsAgentOptions || {},
+                    ...proxyOptions,
+                });
+                break;
+            case "socks":
+            case "socks5":
+            case "socks4":
+                agent = new SocksProxyAgent({
+                    ...httpAgentOptions,
+                    ...httpsAgentOptions,
+                    ...proxyOptions,
+                });
+
+                httpAgent = agent;
+                httpsAgent = agent;
+                break;
+
+            default: throw new Error(`Unsupported proxy protocol provided. ${proxy.protocol}`);
+        }
+
+        return {
+            httpAgent,
+            httpsAgent
+        };
+    }
 }
 
 /**

src/components/ProxyDialog.vue

@@ -15,6 +15,9 @@
                             <select id="proxy-protocol" v-model="proxy.protocol" class="form-select">
                                 <option value="https">HTTPS</option>
                                 <option value="http">HTTP</option>
+                                <option value="socks">SOCKS</option>
+                                <option value="socks5">SOCKS v5</option>
+                                <option value="socks4">SOCKS v4</option>
                             </select>
                         </div>
 

src/pages/EditMonitor.vue

@@ -237,7 +237,7 @@
                                 <input :id="`proxy-${proxy.id}`" v-model="monitor.proxyId" :value="proxy.id" name="proxy" class="form-check-input" type="radio">
 
                                 <label class="form-check-label" :for="`proxy-${proxy.id}`">
-                                    {{ proxy.host }}
+                                    {{ proxy.host }}:{{ proxy.port }} ({{ proxy.protocol }})
                                     <a href="#" @click="$refs.proxyDialog.show(proxy.id)">{{ $t("Edit") }}</a>
                                 </label>
 

src/pages/Settings.vue

@@ -282,7 +282,8 @@
 
                             <ul class="list-group mb-3" style="border-radius: 1rem;">
                                 <li v-for="(proxy, index) in $root.proxyList" :key="index" class="list-group-item">
-                                    {{ proxy.host }}<span v-if="proxy.default === true" class="badge bg-primary ms-2">{{ $t("Default") }}</span><br>
+                                    {{ proxy.host }}:{{ proxy.port }} ({{ proxy.protocol }})
+                                    <span v-if="proxy.default === true" class="badge bg-primary ms-2">{{ $t("Default") }}</span><br>
                                     <a href="#" @click="$refs.proxyDialog.show(proxy.id)">{{ $t("Edit") }}</a>
                                 </li>
                             </ul>