blocks|key|573394|text|您只需使用res.send(404);即可使用res.send('OMG+:(',+404);|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|573395|entityMap^0|5|E|N|O|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

You can use <code>res.send('OMG :(', 404);</code> just <code>res.send(404);</code>

blocks|key|357658|text|捆绑在一起的errorHandler中间件版本(可能是较旧的？)express的各个版本似乎都有硬编码的状态代码。这里记录的版本:另一方面，http://www.senchalabs.org/connect/errorHandler.html可以让你做你想做的事情。因此，也许可以尝试升级到最新版本的express/connect。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|357659|entityMap|0|LINK|mutability|MUTABLE|url|http://www.senchalabs.org/connect/errorHandler.html^0|1Y|1F|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

The version of the errorHandler middleware bundled with some (perhaps older?) versions of express seems to have the status code hardcoded. The version documented here: <a href="http://www.senchalabs.org/connect/errorHandler.html">http://www.senchalabs.org/connect/errorHandler.html</a> on the other hand lets you do what you are trying to do. So, perhaps trying upgrading to the latest version of express/connect.

blocks|key|573445|text|这是个老问题，但还是会出现在Google上。在当前版本的Express+(3.4.0)中，您可以在调用next(Err)之前更改res.statusCode：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|573446|res.statusCode+=+404;
next(new+Error('File+not+found'));|code-block|syntax|javascript|573447|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Old question, but still coming up on Google. In the current version of Express (3.4.0), you can alter res.statusCode before calling next(err):

<pre><code>res.statusCode = 404;
next(new Error('File not found'));
</code></pre>

blocks|key|357721|text|根据Express+(版本4%2B)文档，您可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|357722|res.status(400);
res.send('None+shall+pass');|code-block|syntax|javascript|357723|http://expressjs.com/4x/api.html#res.status|offset|length|357724|<=3.8|357725|res.statusCode+=+401;
res.send('None+shall+pass');|357726|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|17|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|W|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|X|8|@]|9|@$I|Y|J|Z|1|10]]|A|$]]|$1|K|3|L|5|6|7|11|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|H]]]]

Per the Express (Version 4+) docs, you can use:

<pre><code>res.status(400);
res.send('None shall pass');
</code></pre>

<a href="http://expressjs.com/4x/api.html#res.status">http://expressjs.com/4x/api.html#res.status</a>

&lt;=3.8

<pre><code>res.statusCode = 401;
res.send('None shall pass');
</code></pre>

blocks|key|357763|text|从我在Express+4.0中看到的情况来看，这对我来说是可行的。这是需要身份验证的中间件的示例。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|357764|function+apiDemandLoggedIn(req,+res,+next)+{

++++//+if+user+is+authenticated+in+the+session,+carry+on
++++console.log('isAuth',+req.isAuthenticated(),+req.user);
++++if+(req.isAuthenticated())
++++++++return+next();

++++//+If+not+return+401+response+which+means+unauthroized.
++++var+err+=+new+Error();
++++err.status+=+401;
++++next(err);
}|code-block|syntax|javascript|357765|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

From what I saw in Express 4.0 this works for me. This is example of authentication required middleware.

<pre><code>function apiDemandLoggedIn(req, res, next) {

 // if user is authenticated in the session, carry on
 console.log('isAuth', req.isAuthenticated(), req.user);
 if (req.isAuthenticated())
 return next();

 // If not return 401 response which means unauthroized.
 var err = new Error();
 err.status = 401;
 next(err);
}
</code></pre>

blocks|key|357812|text|一个简单的线条；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|357813|res.status(404).send("Oh+uh,+something+went+wrong");|code-block|syntax|javascript|357814|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A simple one liner; 

<pre><code>res.status(404).send("Oh uh, something went wrong");
</code></pre>

blocks|key|357844|text|在express+4.0中，他们做对了:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|357845|res.sendStatus(statusCode)
//+Sets+the+response+HTTP+status+code+to+statusCode+and+send+its+string+representation+as+the+response+body.

res.sendStatus(200);+//+equivalent+to+res.status(200).send('OK')
res.sendStatus(403);+//+equivalent+to+res.status(403).send('Forbidden')
res.sendStatus(404);+//+equivalent+to+res.status(404).send('Not+Found')
res.sendStatus(500);+//+equivalent+to+res.status(500).send('Internal+Server+Error')

//If+an+unsupported+status+code+is+specified,+the+HTTP+status+is+still+set+to+statusCode+and+the+string+version+of+the+code+is+sent+as+the+response+body.

res.sendStatus(2000);+//+equivalent+to+res.status(2000).send('2000')|code-block|syntax|javascript|357846|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In express 4.0 they got it right :)

<pre><code>res.sendStatus(statusCode)
// Sets the response HTTP status code to statusCode and send its string representation as the response body.

res.sendStatus(200); // equivalent to res.status(200).send('OK')
res.sendStatus(403); // equivalent to res.status(403).send('Forbidden')
res.sendStatus(404); // equivalent to res.status(404).send('Not Found')
res.sendStatus(500); // equivalent to res.status(500).send('Internal Server Error')

//If an unsupported status code is specified, the HTTP status is still set to statusCode and the string version of the code is sent as the response body.

res.sendStatus(2000); // equivalent to res.status(2000).send('2000')
</code></pre>

blocks|key|357895|text|Express已弃用res.send(body,+status)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|357896|请改用res.status(status).send(body)|357897|entityMap^0|A|M|0|3|T|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

Express deprecated <code>res.send(body, status)</code>.
Use <code>res.status(status).send(body)</code> instead

blocks|key|357948|text|我建议使用Boom包来处理http错误代码的发送。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|357949|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/hapijs/boom^0|5|4|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I would recommend handling the sending of http error codes by using the <a href="https://github.com/hapijs/boom" rel="nofollow noreferrer">Boom</a> package.

blocks|key|357977|text|异步方式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|357978|++myNodeJs.processAsync(pays)
++++++++.then((result)+=>+{
++++++++++++myLog.logger.info('API+200+OK');
++++++++++++res.statusCode+=+200;
++++++++++++res.json(result);
++++++++++++myLog.logger.response(result);
++++++++})
++++++++.fail((error)+=>+{
++++++++++++if+(error+instanceof+myTypes.types.MyError)+{
++++++++++++++++log.logger.info(`My+Custom+Error:${error.toString()}`);
++++++++++++++++res.statusCode+=+400;
++++++++++++++++res.json(error);
++++++++++++}+else+{
++++++++++++++++log.logger.error(error);
++++++++++++++++res.statusCode+=+500;
++++++++++++++++//+it+seems+standard+errors+do+not+go+properly+into+json+by+themselves
++++++++++++++++res.json({
++++++++++++++++++++name:+error.name,
++++++++++++++++++++message:+error.message
++++++++++++++++});
++++++++++++}
++++++++++++log.logger.response(error);
++++++++})
++++++++.done();|code-block|syntax|javascript|357979|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Async way:
<pre><code> myNodeJs.processAsync(pays)
 .then((result) =&gt; {
 myLog.logger.info('API 200 OK');
 res.statusCode = 200;
 res.json(result);
 myLog.logger.response(result);
 })
 .fail((error) =&gt; {
 if (error instanceof myTypes.types.MyError) {
 log.logger.info(`My Custom Error:${error.toString()}`);
 res.statusCode = 400;
 res.json(error);
 } else {
 log.logger.error(error);
 res.statusCode = 500;
 // it seems standard errors do not go properly into json by themselves
 res.json({
 name: error.name,
 message: error.message
 });
 }
 log.logger.response(error);
 })
 .done();
</code></pre>

I have tried:

<pre><code>app.get('/', function(req, res, next) {
 var e = new Error('error message');
 e.status = 400;
 next(e);
});
</code></pre>

and:

<pre><code>app.get('/', function(req, res, next) {
 res.statusCode = 400;
 var e = new Error('error message');
 next(e);
});
</code></pre>

but always an error code of 500 is announced.

How to specify HTTP error code using Express.js?

身份验证

中间件

我试过了：app.get('/', function(req, res, next) {    var e = new Error('error message');    e.status = 400;    next(e);});和：app.get('/', function(req, res, next) {  ...

问如何使用Express.js指定HTTP错误码？
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