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Fix: Proxy setup failure handling across scripts:
- Improved error messaging in options.js
- Added 'proxyFailed' message handler in background.js
- Updated UI toggle state in popup.js when proxy fails

js/background.js

@@ -1,5 +1,4 @@
 let proxies = []; // Initially empty, will be populated from local storage or fetched from the server
-
 let currentProxyIndex = 0; // Start with the first proxy
 let proxyEnabled = false;
 
@@ -191,6 +190,7 @@ chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
         sendResponse({ status: "error", message: "No public proxy available at this moment. Please configure a custom proxy in the settings." });
       }
     });
+    return true; // For async response
   } else if (message.action === "disableProxy") {
     console.log("Disabling proxy...");
     clearProxySettings();
@@ -238,6 +238,7 @@ chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
           sendResponse({ status: "error", message: "No public proxy available at this moment. Please configure a custom proxy in the settings." });
         }
       });
+      return true; // For async response
     } else if (message.type === "disabled") {
       clearProxySettings();
       chrome.storage.local.set({ proxyEnabled: false, proxyType: null });
@@ -252,6 +253,19 @@ chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
         }
       });
     }
+  } else if (message.action === "proxyFailed") {
+    console.log("Proxy setup failed:", message.error);
+    clearProxySettings();
+    chrome.storage.local.set({ proxyEnabled: false, proxyType: null });
+    chrome.tabs.query({}, function(tabs) {
+      for (let tab of tabs) {
+        chrome.tabs.sendMessage(tab.id, {action: "toggleOff"}, function(response) {
+          if (chrome.runtime.lastError) {
+            console.warn("Warning: Could not send message to tab " + tab.id + ". Tab might have been closed.", chrome.runtime.lastError.message);
+          }
+        });
+      }
+    });
   } else if (message.action === "updateProxies") {
     console.log("Attempting to update proxies...");
     fetchProxies().then(() => {

js/options.js

@@ -177,8 +177,16 @@ saveSettings.addEventListener("click", () => {
           statusMessage.style.fontFamily = "Arial";
           statusMessage.style.fontWeight = "bold";
           applyProxySettings(proxyIP.value, proxyPort.value, filteredExceptions);
-          chrome.runtime.sendMessage({ action: "updateProxy", type: "custom", proxy: { host: proxyIP.value, port: parseInt(proxyPort.value) }, exceptions: filteredExceptions });
+          
-          clearStatusMessage();
+          // Send response to the message sender
+          chrome.runtime.sendMessage({ action: "updateProxy", type: "custom", proxy: { host: proxyIP.value, port: parseInt(proxyPort.value) }, exceptions: filteredExceptions }, (response) => {
+            if (chrome.runtime.lastError) {
+              console.error("Error sending message:", chrome.runtime.lastError);
+            } else {
+              console.log("Response received:", response);
+            }
+            clearStatusMessage();
+          });
         }
       });
     })
@@ -189,6 +197,16 @@ saveSettings.addEventListener("click", () => {
       statusMessage.style.fontFamily = "Arial";
       statusMessage.style.fontWeight = "bold";
       chrome.proxy.settings.clear({});
+
+      // Send a message indicating proxy setup failed
+      chrome.runtime.sendMessage({ action: "proxyFailed", error: error }, (response) => {
+        if (chrome.runtime.lastError) {
+          console.error("Error sending message:", chrome.runtime.lastError);
+        } else {
+          console.log("Response received for proxy failure:", response);
+        }
+        clearStatusMessage();
+      });
     })
     .finally(() => {
       // Re-enable the saveSettings button after the check is complete

js/popup.js

@@ -158,6 +158,15 @@ document.addEventListener("DOMContentLoaded", () => {
       statusMessage.style.color = "#f39c12"; // Orange for loading
     } else if (message.action === "updateStatus") {
       updateStatusFromBackground(message);
+    } else if (message.action === "toggleOff") {
+      // This is for when a proxy setup fails
+      proxyToggle.checked = false;
+      statusMessage.textContent = "Failed to set up proxy. Please check your settings.";
+      statusMessage.style.color = "#e74c3c"; // Red for error
+      // You might want to clear this message after some time or on interaction
+      setTimeout(() => {
+        statusMessage.textContent = "";
+      }, 5000); // Clear after 5 seconds
     }
   });