Extend supported Node.js from <=9 to <=14

Author: Rob--W

.travis.yml

@@ -6,6 +6,11 @@ node_js:
   - 7
   - 8
   - 9
+  - 11
+  - 12
+  - 13
+  - 13
+  - 14
 script:
   - npm run lint
   - npm run test

lib/cors-anywhere.js

@@ -413,6 +413,11 @@ exports.createServer = function createServer(options) {
       // This could happen when a protocol error occurs when an error occurs
       // after the headers have been received (and forwarded). Do not write
       // the headers because it would generate an error.
+      // Prior to Node 13.x, the stream would have ended.
+      // As of Node 13.x, we must explicitly close it.
+      if (res.writableEnded === false) {
+        res.end();
+      }
       return;
     }
 

test/test.js

@@ -385,10 +385,15 @@ describe('Proxy errors', function() {
   });
 
   it('Content-Length mismatch', function(done) {
+    var errorMessage = 'Error: Parse Error: Invalid character in Content-Length';
+    // <13.0.0: https://github.com/nodejs/node/commit/ba565a37349e81c9d2402b0c8ef05ab39dca8968
+    if (parseInt(process.versions.node, 10) < 13) {
+      errorMessage = 'Error: Parse Error';
+    }
     request(cors_anywhere)
       .get('/' + bad_http_server_url)
       .expect('Access-Control-Allow-Origin', '*')
-      .expect(404, 'Not found because of proxy error: Error: Parse Error', done);
+      .expect(404, 'Not found because of proxy error: ' + errorMessage, done);
   });
 
   it('Invalid HTTP status code', function(done) {