fix(filter): handle errors

Author: chimurai

Diff for: CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [v2.0.7](https://github.com/chimurai/http-proxy-middleware/releases/tag/v2.0.7)
 
 - ci(github actions): add publish.yml
+- fix(filter): handle errors
 
 ## [v2.0.6](https://github.com/chimurai/http-proxy-middleware/releases/tag/v2.0.6)
 

Diff for: package.json

@@ -1,6 +1,6 @@
 {
   "name": "http-proxy-middleware",
-  "version": "2.0.7-beta.0",
+  "version": "2.0.7-beta.1",
   "description": "The one-liner node.js proxy middleware for connect, express and browser-sync",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

Diff for: src/http-proxy-middleware.ts

@@ -109,8 +109,13 @@ export class HttpProxyMiddleware {
    * @return {Boolean}
    */
   private shouldProxy = (context, req: Request): boolean => {
-    const path = req.originalUrl || req.url;
-    return contextMatcher.match(context, path, req);
+    try {
+      const path = req.originalUrl || req.url;
+      return contextMatcher.match(context, path, req);
+    } catch (error) {
+      this.logger.error(error);
+      return false;
+    }
   };
 
   /**

Diff for: test/e2e/http-proxy-middleware.spec.ts

@@ -153,6 +153,34 @@ describe('E2E http-proxy-middleware', () => {
         const response = await agent.get(`/api/b/c/d`).expect(404);
         expect(response.status).toBe(404);
       });
+
+      it('should not proxy when filter throws Error', async () => {
+        const myError = new Error('MY_ERROR');
+        const filter = (path, req) => {
+          throw myError;
+        };
+
+        const logger = {
+          log: jest.fn(),
+          info: jest.fn(),
+          warn: jest.fn(),
+          error: jest.fn(),
+        };
+
+        agent = request(
+          createApp(
+            createProxyMiddleware(filter, {
+              target: `http://localhost:${mockTargetServer.port}`,
+              logProvider: () => logger,
+            })
+          )
+        );
+
+        await mockTargetServer.get('/api/b/c/d').thenReply(200, 'HELLO WEB');
+        const response = await agent.get(`/api/b/c/d`).expect(404);
+        expect(response.status).toBe(404);
+        expect(logger.error).toHaveBeenCalledWith(expect.objectContaining(myError));
+      });
     });
 
     describe('multi path', () => {