loopback.io错误：发送后无法设置标头。 确认用户
我正在使用摩卡和supertest来创buildfunctiontesting。 以下是testing的副本。
it("should verify user POST /api/User/confirm", function (done) { app.models.Users.findById(userId, function (err, usr) { json('get', '/api/user/confirm?uid=' + userId + '&token=' + usr.verificationToken) .expect(204,done); }); }); 然而这个testing返回：
Error: Can't set headers after they are sent. at ServerResponse.OutgoingMessage.setHeader (http.js:689:11) at ServerResponse.res.setHeader (/node_modules/loopback-explorer/node_modules/express/node_modules/connect/lib/patch.js:134:22) at ServerResponse.header (/node_modules/loopback/node_modules/express/lib/response.js:700:10) at ServerResponse.send (/node_modules/loopback/node_modules/express/lib/response.js:154:12) at ServerResponse.json (/node_modules/loopback/node_modules/express/lib/response.js:240:15) at ServerResponse.send (/node_modules/loopback/node_modules/express/lib/response.js:142:21) at defaultHandler (/node_modules/loopback/node_modules/strong-remoting/lib/rest-adapter.js:379:11) at restErrorHandler (/node_modules/loopback/node_modules/strong-remoting/lib/rest-adapter.js:348:14) at Layer.handle_error (/node_modules/loopback/node_modules/express/lib/router/layer.js:58:5) at trim_prefix (/node_modules/loopback/node_modules/express/lib/router/index.js:300:13) at /node_modules/loopback/node_modules/express/lib/router/index.js:270:7 at Function.proto.process_params (/node_modules/loopback/node_modules/express/lib/router/index.js:321:12) at next (/node_modules/loopback/node_modules/express/lib/router/index.js:261:10) at Layer.handle_error (/node_modules/loopback/node_modules/express/lib/router/layer.js:54:12) at trim_prefix (/node_modules/loopback/node_modules/express/lib/router/index.js:300:13) at /node_modules/loopback/node_modules/express/lib/router/index.js:270:7 at Function.proto.process_params (/node_modules/loopback/node_modules/express/lib/router/index.js:321:12) at Object.next (/node_modules/loopback/node_modules/express/lib/router/index.js:261:10) at Object. (/node_modules/loopback/node_modules/express/lib/router/index.js:603:15) at Object. (/node_modules/loopback/node_modules/continuation-local-storage/node_modules/async-listener/glue.js:188:31) at Object.immediate._onImmediate (timers.js:363:16) at processImmediate as _immediateCallback
我正在使用最新版本的环回。 有人能指出我的方向吗？
这通常是由代码中res.send()多次使用造成的。 我会检查是否是这样的情况。