blocks|key|3060712|text|检查console.log(req)或console.log(req.headers);的输出|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3060713|entityMap^0|2|G|J|P|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|$]]

Check output of <code>console.log(req)</code> or <code>console.log(req.headers);</code>

blocks|key|3060745|text|var+host+=+req.headers['host'];+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3060746|标头存储在JavaScript对象中，标头字符串作为对象键。|unstyled|3060747|同样，可以使用以下命令获取用户代理头|3060748|var+userAgent+=+req.headers['user-agent'];+|3060749|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$B|C]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>var host = req.headers['host']; 
</code></pre>

The headers are stored in a JavaScript object, with the header strings as object keys. 

Likewise, the user-agent header could be obtained with 

<pre><code>var userAgent = req.headers['user-agent']; 
</code></pre>

blocks|key|206684|text|如果使用的是Express4.x，则可以使用Express+4.x+API+Reference中所述的req.get(headerName)方法|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|206685|entityMap|0|LINK|mutability|MUTABLE|url|http://expressjs.com/en/api.html#req.get^0|1F|J|M|P|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

If you use Express 4.x, you can use the <code>req.get(headerName)</code> method as described in <a href="http://expressjs.com/en/api.html#req.get" rel="noreferrer">Express 4.x API Reference</a>

blocks|key|209330|text|要查看HTTP请求头的列表，您可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|209331|console.log(JSON.stringify(req.headers));|code-block|syntax|javascript|209332|返回JSON格式的列表。|209333|{
"host":"localhost:8081",
"connection":"keep-alive",
"cache-control":"max-age=0",
"accept":"text/html,application/xhtml%2Bxml,application/xml;q=0.9,image/webp,*/*;q=0.8",
"upgrade-insecure-requests":"1",
"user-agent":"Mozilla/5.0+(Windows+NT+6.1;+WOW64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/44.0.2403.107+Safari/537.36",
"accept-encoding":"gzip,+deflate,+sdch",
"accept-language":"en-US,en;q=0.8,et;q=0.6"
}|209334|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

To see a list of HTTP request headers, you can use :

<pre><code>console.log(JSON.stringify(req.headers));
</code></pre>

to return a list in JSON format.

<pre><code>{
"host":"localhost:8081",
"connection":"keep-alive",
"cache-control":"max-age=0",
"accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
"upgrade-insecure-requests":"1",
"user-agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.107 Safari/537.36",
"accept-encoding":"gzip, deflate, sdch",
"accept-language":"en-US,en;q=0.8,et;q=0.6"
}
</code></pre>

blocks|key|3060820|text|logger.info({headers:req.headers})|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3060821|输出；|unstyled|3060822|+"headers":{"authorization":"Basic+bmluYWQ6bmluYWQ=","content-
type":"application/json","user-
agent":"PostmanRuntime/7.26.8","accept":"*/*","postman-token":"36e0d84a-
55be-4661-bb1e-1f04d9499574","host":"localhost:9012","accept-
encoding":"gzip,+deflate,+br","connection":"keep-alive","content-
length":"198"}|3060823|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>logger.info({headers:req.headers})
</code></pre>
Output;
<pre><code> &quot;headers&quot;:{&quot;authorization&quot;:&quot;Basic bmluYWQ6bmluYWQ=&quot;,&quot;content-
type&quot;:&quot;application/json&quot;,&quot;user-
agent&quot;:&quot;PostmanRuntime/7.26.8&quot;,&quot;accept&quot;:&quot;*/*&quot;,&quot;postman-token&quot;:&quot;36e0d84a-
55be-4661-bb1e-1f04d9499574&quot;,&quot;host&quot;:&quot;localhost:9012&quot;,&quot;accept-
encoding&quot;:&quot;gzip, deflate, br&quot;,&quot;connection&quot;:&quot;keep-alive&quot;,&quot;content-
length&quot;:&quot;198&quot;}
</code></pre>

blocks|key|209360|text|在express中，我们可以使用request.headers'+header+-name'，例如，如果你在authorization+header中设置了一个持有者token，并且想要检索该token，那么你应该写req.headers'authorization'，然后你会得到包含'Bearer‘的字符串。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|209361|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In express, we can use request.headers['header-name'], For example if you have set up a Bearer token in authorization header and want to retrieve the token, then you should write req.headers['authorization'], and you will get the string containing 'Bearer tokenString'.

I'd like to get the "Host" header of a request made using Node JS's connect library bundle. My code looks like: 

<pre><code>var app = connect()
 .use(connect.logger('dev'))
 .use(connect.static('public'))
 .use(function(req, res){

 var host = req.???

 })
 .listen(3000);
</code></pre>

The documentation for connect is here but I don't see anything detailing the API of the <code>req</code> object in the above code. <a href="http://www.senchalabs.org/connect/" rel="noreferrer">http://www.senchalabs.org/connect/</a>

Edit: Note a successful answer must point to the documentation (I need this to verify which version provided the API I'm looking for).

How to extract request http headers from a request using NodeJS connect

Windows

JSON

我想要获取使用Node JS的连接库包发出的请求的"Host“头。我的代码看起来像这样：var app = connect()  .use(connect.logger('dev'))  .use(connect.static('public'))  .use(function(req, res){    var ho...

问如何使用NodeJS connect从请求中提取请求http头
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