fix bad http credentials causing a dos attack cause firefox is the best browser

ext/bg.js

@@ -12,6 +12,7 @@ var global_ws = null;
 var container_count = 0;
 
 var proxy_map = {};
+var proxy_map_http_attempts = new Map();
 
 var web_response_whitelist = ["main_frame", "xmlhttprequest"];
 
@@ -201,6 +202,12 @@ function attach_ws_events(ws){
 	
 	ws.addEventListener("open", async function(){
 		
+		// clean up internal previous garbage
+		webreq_completed = new Map();
+		proxy_map = {};
+		proxy_map_http_attempts = new Map();
+		web_response_whitelist = ["main_frame", "xmlhttprequest"];
+		
 		console.log("ws: connected");
 		await set_status(STATUS_CONNECTED);
 	});
@@ -421,6 +428,15 @@ function attach_ws_events(ws){
 				break;
 			
 			case "container_delete":
+				// clear http proxy cache
+				try{
+					
+					await browser.webRequest.handlerBehaviorChanged();
+				}catch(err){
+					
+					console.log("warn: http proxy cache flush failed: " + err);
+				}
+				
 				var deleted_containers = 0;
 				
 				switch(typeof msg.id){
@@ -505,7 +521,6 @@ function attach_ws_events(ws){
 	ws.addEventListener("close", async function(e){
 		
 		console.log("ws: offline");
-		webreq_completed = new Map();
 		await set_status(STATUS_OFFLINE);
 	});
 }
@@ -604,6 +619,7 @@ browser.webRequest.onBeforeRequest.addListener(
 			
 			resolve_func({success: false});
 			webreq_completed.delete(details.requestId);
+			proxy_map_http_attempts.delete(details.requestId);
 			return;
 		}	
 		
@@ -643,6 +659,7 @@ browser.webRequest.onBeforeRequest.addListener(
 			
 			resolve_func({success: false});
 			webreq_completed.delete(details.requestId);
+			proxy_map_http_attempts.delete(details.requestId);
 		}
 	},
 	{ urls: ["<all_urls>"] },
@@ -690,6 +707,7 @@ browser.webRequest.onCompleted.addListener(
 		
 		// clean up
 		webreq_completed.delete(details.requestId);
+		proxy_map_http_attempts.delete(details.requestId);
 	},
 	{ urls: ["<all_urls>"] }
 );
@@ -703,9 +721,12 @@ browser.webRequest.onErrorOccurred.addListener(
 		if(!web_response_whitelist.includes(page.type)){
 			
 			webreq_completed.delete(page.requestId);
+			proxy_map_http_attempts.delete(page.requestId);
 			return;
 		}
 		
+		const proxy_config = proxy_map[page.cookieStoreId];
+		
 		send_event(
 			global_ws,
 			{
@@ -719,6 +740,7 @@ browser.webRequest.onErrorOccurred.addListener(
 		);
 		
 		webreq_completed.delete(page.requestId);
+		proxy_map_http_attempts.delete(page.requestId);
 	},
 	{ urls: ["<all_urls>"] }
 );
@@ -728,8 +750,11 @@ browser.proxy.onRequest.addListener(function(request){
 	const proxy_config = proxy_map[request.cookieStoreId];
 	
 	if(
-		proxy_config.type == "http" ||
+		proxy_config &&
-		proxy_config.type == "https"
+		(
+			proxy_config.type == "http" ||
+			proxy_config.type == "https"
+		)
 	){
 		
 		return {
@@ -775,6 +800,31 @@ browser.webRequest.onAuthRequired.addListener(
 			proxy_config.password
 		){
 			
+			// check if creds have been tried before...
+			var attempts = proxy_map_http_attempts.get(details.requestId);
+			
+			if(typeof attempts == "undefined"){
+				
+				proxy_map_http_attempts.set(details.requestId, 1);
+			}else{
+				
+				send_event(
+					global_ws,
+					{
+						"action": "dom_load_fail",
+						"data": {
+							id: details.tabId,
+							url: details.url,
+							error: "HTTP proxy refused the connection"
+						}
+					}
+				);
+				
+				webreq_completed.delete(details.requestId);
+				proxy_map_http_attempts.delete(details.requestId);
+				return;
+			}
+			
 			return {
 				authCredentials: {
 					username: proxy_config.username,