grpc-js: fix error messages truncating at commas

packages/grpc-js/src/metadata-status-filter.ts

@@ -38,7 +38,7 @@ export class MetadataStatusFilter extends BaseFilter implements Filter {
       metadata.remove('grpc-status');
     }
     if (typeof metadataMap['grpc-message'] === 'string') {
-      details = decodeURI(metadataMap['grpc-message'] as string);
+      details = decodeURIComponent(metadataMap['grpc-message'] as string);
       metadata.remove('grpc-message');
     }
     return { code, details, metadata };

packages/grpc-js/src/server-call.ts

@@ -484,7 +484,9 @@ export class Http2ServerCallStream<
         const trailersToSend = Object.assign(
           {
             [GRPC_STATUS_HEADER]: statusObj.code,
-            [GRPC_MESSAGE_HEADER]: encodeURI(statusObj.details as string),
+            [GRPC_MESSAGE_HEADER]: encodeURIComponent(
+              statusObj.details as string
+            ),
           },
           statusObj.metadata.toHttp2Headers()
         );

packages/grpc-js/test/test-server-errors.ts

@@ -699,6 +699,18 @@ describe('Other conditions', () => {
         }
       );
     });
+
+    it('for an error message with a comma', done => {
+      client.unary(
+        { error: true, message: 'an error message, with a comma' },
+        (err: ServiceError, data: any) => {
+          assert(err);
+          assert.strictEqual(err.code, grpc.status.UNKNOWN);
+          assert.strictEqual(err.details, 'an error message, with a comma');
+          done();
+        }
+      );
+    });
   });
 });