运行nodejs服务器时为什么会出现此错误？(Why this error coming while running nodejs server?)

运行nodejs服务器时为什么会出现此错误？(Why this error coming while running nodejs server?)

运行nodejs Server时出现此错误

Error: Not Found at C:\wamp\www\scope-leads-node-master\MyApp\app.js:30:13 at Layer.handle [as handle_request] (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\layer.js:95:5) at trim_prefix (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:312:13) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:280:7 at Function.process_params (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:330:12) at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:271:10) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:618:15 at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:256:14) at Function.handle (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:176:3) at router (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:46:12) var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); var routes = require('./routes/index'); var users = require('./routes/users'); var app = express(); // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); // uncomment after placing your favicon in /public //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico'))); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); app.use('/', routes); app.use('/users', users); // catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); }); // error handlers // development error handler // will print stacktrace if (app.get('env') === 'development') { app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: err }); }); } // production error handler // no stacktraces leaked to user app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: {} }); }); module.exports = app;

I am getting this error while running nodejs Server

Error: Not Found at C:\wamp\www\scope-leads-node-master\MyApp\app.js:30:13 at Layer.handle [as handle_request] (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\layer.js:95:5) at trim_prefix (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:312:13) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:280:7 at Function.process_params (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:330:12) at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:271:10) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:618:15 at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:256:14) at Function.handle (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:176:3) at router (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:46:12) var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); var routes = require('./routes/index'); var users = require('./routes/users'); var app = express(); // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); // uncomment after placing your favicon in /public //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico'))); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); app.use('/', routes); app.use('/users', users); // catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); }); // error handlers // development error handler // will print stacktrace if (app.get('env') === 'development') { app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: err }); }); } // production error handler // no stacktraces leaked to user app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: {} }); }); module.exports = app;

最满意答案

嗯，这是你在你写的中间件中传递的错误（第30行）：

app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); });

此代码只是在每个HTTP请求上传递错误，您应该将其注释掉。

Finally, It's working. I am still seeing that "not found" error in http://localhost:3000. But everything is working fine. I have used another computer to do this. Just did the following.

npm install express npm install npm start

nodejs, git server should haven been installed in our machine.

运行nodejs服务器时为什么会出现此错误？(Why this error coming while running nodejs server?)

运行nodejs Server时出现此错误

Error: Not Found at C:\wamp\www\scope-leads-node-master\MyApp\app.js:30:13 at Layer.handle [as handle_request] (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\layer.js:95:5) at trim_prefix (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:312:13) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:280:7 at Function.process_params (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:330:12) at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:271:10) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:618:15 at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:256:14) at Function.handle (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:176:3) at router (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:46:12) var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); var routes = require('./routes/index'); var users = require('./routes/users'); var app = express(); // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); // uncomment after placing your favicon in /public //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico'))); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); app.use('/', routes); app.use('/users', users); // catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); }); // error handlers // development error handler // will print stacktrace if (app.get('env') === 'development') { app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: err }); }); } // production error handler // no stacktraces leaked to user app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: {} }); }); module.exports = app;

I am getting this error while running nodejs Server

Error: Not Found at C:\wamp\www\scope-leads-node-master\MyApp\app.js:30:13 at Layer.handle [as handle_request] (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\layer.js:95:5) at trim_prefix (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:312:13) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:280:7 at Function.process_params (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:330:12) at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:271:10) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:618:15 at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:256:14) at Function.handle (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:176:3) at router (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:46:12) var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); var routes = require('./routes/index'); var users = require('./routes/users'); var app = express(); // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); // uncomment after placing your favicon in /public //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico'))); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); app.use('/', routes); app.use('/users', users); // catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); }); // error handlers // development error handler // will print stacktrace if (app.get('env') === 'development') { app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: err }); }); } // production error handler // no stacktraces leaked to user app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: {} }); }); module.exports = app;

最满意答案

嗯，这是你在你写的中间件中传递的错误（第30行）：

app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); });

此代码只是在每个HTTP请求上传递错误，您应该将其注释掉。

Finally, It's working. I am still seeing that "not found" error in http://localhost:3000. But everything is working fine. I have used another computer to do this. Just did the following.

npm install express npm install npm start

nodejs, git server should haven been installed in our machine.