blocks|key|1934760|text|当您使用curl调用它时，您声称已经“尝试做了”的事情就是您在代码中编写的，并且可以“按预期”工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1934761|您收到的错误似乎与您向我们显示的任何代码都无关。|1934762|如果希望获得原始请求，请在request上为data和end事件设置处理程序(当然，还要删除对express.bodyParser()的任何调用)。请注意，data事件将以块的形式发生，除非您为data事件设置了编码，否则这些块将是缓冲区，而不是字符串。|offset|length|style|CODE|1934763|entityMap^0|0|0|D|7|M|4|R|3|1B|K|26|4|2P|4|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@$F|O|G|P|H|I]|$F|Q|G|R|H|I]|$F|S|G|T|H|I]|$F|U|G|V|H|I]|$F|W|G|X|H|I]|$F|Y|G|Z|H|I]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|K|$]]

What you claim to have "tried doing" is exactly what you wrote in the code that works "as expected" when you invoke it with curl.

The error you're getting doesn't appear to be related to any of the code you've shown us.

If you want to get the raw request, set handlers on <code>request</code> for the <code>data</code> and <code>end</code> events (and, of course, remove any invocations of <code>express.bodyParser()</code>). Note that the <code>data</code> events will occur in chunks, and that unless you set an encoding for the <code>data</code> event those chunks will be buffers, not strings.

blocks|key|1721236|text|Express+4.0及更高版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1721237|$+npm+install+--save+body-parser|offset|length|style|CODE|1721238|然后在你的节点应用中：|1721239|const+bodyParser+=+require('body-parser');
app.use(bodyParser);|code-block|syntax|javascript|1721240|1721241|Express+3.0及更低版本：|1721242|尝试在您的cURL调用中传递此参数：|1721243|--header+"Content-Type:+application/json"|1721244|并确保您的数据为JSON格式：|1721245|{"user":"someone"}|1721246|此外，还可以在node.js代码中使用console.dir查看对象内部的数据，如下例所示：|1721247|var+express+=+require('express');
var+app+=+express.createServer();

app.use(express.bodyParser());

app.post('/',+function(req,+res){
++++console.dir(req.body);
++++res.send("test");
});+

app.listen(3000);|1721248|另一个问题可能也有帮助：How+to+receive+JSON+in+express+node.js+POST+request?|1721249|如果您不想使用bodyParser，请查看另一个问题：https://stackoverflow.com/a/9920700/446681|1721250|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/8742982/how-to-receive-json-in-express-node-js-post-request|1|https://stackoverflow.com/a/9920700/446681^0|0|0|W|0|0|0|0|0|0|0|15|0|0|0|I|0|0|0|C|1G|0|0|R|16|1|0^^$0|@$1|2|3|4|5|6|7|1H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1I|8|@$D|1J|E|1K|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1L|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1M|8|@]|9|@]|A|$M|N]]|$1|O|3|-4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1O|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1P|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1Q|8|@$D|1R|E|1S|F|G]]|9|@]|A|$]]|$1|V|3|W|5|6|7|1T|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1U|8|@$D|1V|E|1W|F|G]]|9|@]|A|$]]|$1|Z|3|10|5|6|7|1X|8|@]|9|@]|A|$]]|$1|11|3|12|5|L|7|1Y|8|@]|9|@]|A|$M|N]]|$1|13|3|14|5|6|7|1Z|8|@]|9|@$D|20|E|21|1|22]]|A|$]]|$1|15|3|16|5|6|7|23|8|@]|9|@$D|24|E|25|1|26]]|A|$]]|$1|17|3|-4|5|6|7|27|8|@]|9|@]|A|$]]]|18|$19|$5|1A|1B|1C|A|$1D|1E]]|1F|$5|1A|1B|1C|A|$1D|1G]]]]

<h3>Express 4.0 and above:</h3>

<code>$ npm install --save body-parser</code>

And then in your node app:

<pre><code>const bodyParser = require('body-parser');
app.use(bodyParser);
</code></pre>

<hr>

<h3>Express 3.0 and below:</h3>

Try passing this in your cURL call:

<code>--header "Content-Type: application/json"</code>

and making sure your data is in JSON format:

<code>{"user":"someone"}</code>

Also, you can use console.dir in your node.js code to see the data inside the object as in the following example:

<pre><code>var express = require('express');
var app = express.createServer();

app.use(express.bodyParser());

app.post('/', function(req, res){
 console.dir(req.body);
 res.send("test");
}); 

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

This other question might also help: <a href="https://stackoverflow.com/questions/8742982/how-to-receive-json-in-express-node-js-post-request">How to receive JSON in express node.js POST request?</a>

If you don't want to use the bodyParser check out this other question: <a href="https://stackoverflow.com/a/9920700/446681">https://stackoverflow.com/a/9920700/446681</a>

blocks|key|1934877|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1934878|response.write(JSON.stringify(request.body));|code-block|syntax|javascript|1934879|这将获取bodyParser为您创建的对象，并将其转换回字符串，并将其写入响应。如果您想要确切的请求正文(具有相同的空格等)，则需要在此之前将data和end侦听器附加到请求，并逐块构建字符串，如您在json+parsing+source+code+from+connect中所看到的那样。|offset|length|style|CODE|1934880|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/senchalabs/connect/blob/master/lib/middleware/json.js#L50^0|0|0|4|A|1Z|4|24|3|2S|11|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@$I|X|J|Y|K|L]|$I|Z|J|10|K|L]|$I|11|J|12|K|L]]|9|@$I|13|J|14|1|15]]|A|$]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

Try this:

<pre><code>response.write(JSON.stringify(request.body));
</code></pre>

That will take the object which <code>bodyParser</code> has created for you and turn it back into a string and write it to the response. If you want the exact request body (with the same whitespace, etc), you will need <code>data</code> and <code>end</code> listeners attached to the request before and build up the string chunk by chunk as you can see in the <a href="https://github.com/senchalabs/connect/blob/master/lib/middleware/json.js#L50" rel="nofollow">json parsing source code from connect</a>.

blocks|key|1721583|text|从Express4开始，下面的代码似乎可以做到这一点。请注意，您需要使用npm安装body-parser。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1721584|var+express+=+require('express');
var+bodyParser+=+require('body-parser');
var+app+=+express();
app.use(bodyParser.urlencoded({+extended:+false+}));


app.listen(8888);

app.post('/update',+function(req,+res)+{
++++console.log(req.body);+//+the+posted+data
});|code-block|syntax|javascript|1721585|entityMap^0|10|3|15|B|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

As of Express 4, the following code appears to do the trick.
Note that you'll need to install <code>body-parser</code> using <code>npm</code>.

<pre><code>var express = require('express');
var bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.urlencoded({ extended: false }));


app.listen(8888);

app.post('/update', function(req, res) {
 console.log(req.body); // the posted data
});
</code></pre>

blocks|key|1935188|text|您可以使用以下代码来记录post数据：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1935189|router.post("/users",function(req,res){
++++res.send(JSON.stringify(req.body,+null,+4));
});|code-block|syntax|javascript|1935190|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|$]]

You use the following code to log post data:

<pre><code>router.post("/users",function(req,res){
 res.send(JSON.stringify(req.body, null, 4));
});
</code></pre>

blocks|key|1935232|text|var+express+=+require('express');
var+bodyParser+=+require('body-parser');
var+app+=+express();
app.use(bodyParser.urlencoded({+extended:+false+}));
app.use(bodyParser.json())

var+port+=+9000;

app.post('/post/data',+function(req,+res)+{
++++console.log('receiving+data...');
++++console.log('body+is+',req.body);
++++res.send(req.body);
});

//+start+the+server
app.listen(port);
console.log('Server+started!+At+http://localhost:'+%2B+port);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1935233|这会对你有帮助。我假设你发送的是json格式的body。|unstyled|1935234|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>var express = require('express');
var bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json())

var port = 9000;

app.post('/post/data', function(req, res) {
 console.log('receiving data...');
 console.log('body is ',req.body);
 res.send(req.body);
});

// start the server
app.listen(port);
console.log('Server started! At http://localhost:' + port);
</code></pre>

This will help you. I assume you are sending body in json.

blocks|key|1935267|text|这也可以在没有body-parser依赖的情况下实现，监听request:data和request:end，并在请求结束时返回响应，请参阅下面的代码示例。参考：https://nodejs.org/en/docs/guides/anatomy-of-an-http-transaction/#request-body|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1935268|var+express+=+require('express');
var+app+=+express.createServer(express.logger());

app.post('/',+function(request,+response)+{

++++//+push+the+data+to+body
++++var+body+=+[];
++++request.on('data',+(chunk)+=>+{
++++++body.push(chunk);
++++}).on('end',+()+=>+{
++++++//+on+end+of+data,+perform+necessary+action
++++++body+=+Buffer.concat(body).toString();
++++++response.write(request.body.user);
++++++response.end();
++++});
});|code-block|syntax|javascript|1935269|entityMap|0|LINK|mutability|MUTABLE|url|https://nodejs.org/en/docs/guides/anatomy-of-an-http-transaction/#request-body^0|7|B|T|C|16|B|28|26|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

This can be achieved without <code>body-parser</code> dependency as well, listen to <code>request:data</code> and <code>request:end</code> and return the response on end of request, refer below code sample. ref:<a href="https://nodejs.org/en/docs/guides/anatomy-of-an-http-transaction/#request-body" rel="noreferrer">https://nodejs.org/en/docs/guides/anatomy-of-an-http-transaction/#request-body</a>

<pre><code>var express = require('express');
var app = express.createServer(express.logger());

app.post('/', function(request, response) {

 // push the data to body
 var body = [];
 request.on('data', (chunk) =&gt; {
 body.push(chunk);
 }).on('end', () =&gt; {
 // on end of data, perform necessary action
 body = Buffer.concat(body).toString();
 response.write(request.body.user);
 response.end();
 });
});
</code></pre>

blocks|key|1721777|text|2019年，您无需安装body-parser。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1721778|您可以使用：|1721779|var+express+=+require('express');
var+app+=+express();
app.use(express.json())
app.use(express.urlencoded({extended:+true}))
app.listen(8888);
app.post('/update',+function(req,+res)+{
++++console.log(req.body);+//+the+posted+data
});|code-block|syntax|javascript|1721780|entityMap^0|B|B|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

For 2019, you don't need to install <code>body-parser</code>.

You can use:

<pre><code>var express = require('express');
var app = express();
app.use(express.json())
app.use(express.urlencoded({extended: true}))
app.listen(8888);
app.post('/update', function(req, res) {
 console.log(req.body); // the posted data
});
</code></pre>

blocks|key|1935500|text|我对JS和ES完全是新手，但似乎对我有用的是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1935501|JSON.stringify(req.body)|code-block|syntax|javascript|1935502|如果它有什么问题，请告诉我！|1935503|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I'm absolutely new to JS and ES, but what seems to work for me is just this:

<pre><code>JSON.stringify(req.body)
</code></pre>

Let me know if there's anything wrong with it!

blocks|key|1935557|text|通过以下命令安装Body+Parser|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1935558|$+npm+install+--save+body-parser|code-block|syntax|javascript|1935559|配置正文解析器|1935560|const+bodyParser+=+require('body-parser');
app.use(bodyParser);
app.use(bodyParser.json());+//Make+sure+u+have+added+this+line
app.use(bodyParser.urlencoded({+extended:+false+}));|1935561|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|$]]

Install Body Parser by below command

<pre><code>$ npm install --save body-parser
</code></pre>

Configure Body Parser

<pre><code>const bodyParser = require('body-parser');
app.use(bodyParser);
app.use(bodyParser.json()); //Make sure u have added this line
app.use(bodyParser.urlencoded({ extended: false }));
</code></pre>

blocks|key|1722183|text|您不应该使用body-parser，它已被弃用。试试这个吧|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1722184|​|1722185|const+express+=+require('express')
const+app+=+express()

app.use(express.json())+//Notice+express.json+middleware|code-block|syntax|javascript|1722186|1722187|app.use()函数用于在指定的路径挂载指定的中间件函数。它主要用于为您的应用程序设置中间件。|1722188|现在，要访问主体，只需执行以下操作|1722189|1722190|app.post('/',+(req,+res)+=>+{
++console.log(req.body)
})|1722191|1722192|entityMap^0|6|B|0|0|0|0|0|9|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|10|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|11|8|@]|D|@]|E|$K|L]]|$1|M|3|G|5|6|7|12|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|13|8|@$9|14|A|15|B|C]]|D|@]|E|$]]|$1|P|3|Q|5|6|7|16|8|@]|D|@]|E|$]]|$1|R|3|G|5|6|7|17|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|18|8|@]|D|@]|E|$K|L]]|$1|U|3|G|5|6|7|19|8|@]|D|@]|E|$]]|$1|V|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|W|$]]

You should not use <code>body-parser</code> it is deprecated. Try this instead
<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>const express = require('express')
const app = express()

app.use(express.json()) //Notice express.json middleware</code></pre>
</div>
</div>

The <code>app.use()</code> function is used to mount the specified middleware function(s) at the path which is being specified. It is mostly used to set up middleware for your application.
Now to access the body just do the following
<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>app.post('/', (req, res) =&gt; {
 console.log(req.body)
})</code></pre>
</div>
</div>

blocks|key|1722315|text|接受的答案只适用于与JSON格式兼容的正文。一般情况下，可以使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1722316|app.use(
++Express.raw({
++++inflate:+true,
++++limit:+'50mb',
++++type:+()+=>+true,+//+this+matches+all+content+types
++})
);|code-block|syntax|javascript|1722317|就像发布的here。req.body具有Buffer类型，并且可以转换为所需的格式。|offset|length|style|CODE|1722318|例如，通过以下方式转换为字符串：|1722319|let+body+=+req.body.toString()|1722320|或通过以下方式转换为JSON：|1722321|let+body+=+req.body.toJSON();|1722322|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/69227838/2801669^0|0|0|A|8|K|6|5|4|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@$I|15|J|16|K|L]|$I|17|J|18|K|L]]|9|@$I|19|J|1A|1|1B]]|A|$]]|$1|M|3|N|5|6|7|1C|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|1D|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|1E|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|1F|8|@]|9|@]|A|$E|F]]|$1|U|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

The accepted answer only works for a body that is compatible with the JSON format. In general, the body can be accessed using
<pre><code>app.use(
 Express.raw({
 inflate: true,
 limit: '50mb',
 type: () =&gt; true, // this matches all content types
 })
);
</code></pre>
like posted <a href="https://stackoverflow.com/a/69227838/2801669">here</a>. The <code>req.body</code> has a <code>Buffer</code> type and can be converted into the desired format.
For example into a string via:
<pre><code>let body = req.body.toString()
</code></pre>
Or into JSON via:
<pre><code>let body = req.body.toJSON();
</code></pre>

I have the following Node.js code:

<pre><code>var express = require('express');
var app = express.createServer(express.logger());
app.use(express.bodyParser());

app.post('/', function(request, response) {
 response.write(request.body.user);
 response.end();
});
</code></pre>

Now if I POST something like:

<pre><code>curl -d user=Someone -H Accept:application/json --url http://localhost:5000
</code></pre>

I get <code>Someone</code> as expected. Now, what if I want to get the full request body? I tried doing <code>response.write(request.body)</code> but Node.js throws an exception saying "first argument must be a string or Buffer" then goes to an "infinite loop" with an exception that says "Can't set headers after they are sent."; this also true even if I did <code>var reqBody = request.body;</code> and then writing <code>response.write(reqBody)</code>.

What's the issue here?

Also, can I just get the raw request without using <code>express.bodyParser()</code>?

How to access the request body when POSTing using Node.js and Express?

中间件

JSON

我有以下Node.js代码：var express = require('express');var app = express.createServer(express.logger());app.use(express.bodyParser());app.post('/', function(request, re...

问使用Node.js和Express进行POSTing时，如何访问请求体？
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问使用Node.js和Express进行POSTing时，如何访问请求体？EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问使用Node.js和Express进行POSTing时，如何访问请求体？
EN