blocks|key|699248|text|您可以在请求回调中使用URL+module中的parse方法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|699249|var+http+=+require('http');
var+url+=+require('url');

//+Configure+our+HTTP+server+to+respond+with+Hello+World+to+all+requests.
var+server+=+http.createServer(function+(request,+response)+{
++var+queryData+=+url.parse(request.url,+true).query;
++response.writeHead(200,+{"Content-Type":+"text/plain"});

++if+(queryData.name)+{
++++//+user+told+us+their+name+in+the+GET+request,+ex:+http://host:8000/?name=Tom
++++response.end('Hello+'+%2B+queryData.name+%2B+'\n');

++}+else+{
++++response.end("Hello+World\n");
++}
});

//+Listen+on+port+8000,+IP+defaults+to+127.0.0.1
server.listen(8000);|code-block|syntax|javascript|699250|我建议您阅读HTTP+module+documentation以了解您在createServer回调中得到了什么。您还应该看看像http://howtonode.org/这样的站点，并查看Express+framework，以便更快地开始使用Node。|699251|entityMap|0|LINK|mutability|MUTABLE|url|http://nodejs.org/api/url.html|1|http://nodejs.org/docs/latest/api/http.html|2|http://howtonode.org/|3|http://expressjs.com/^0|N|5|B|A|0|0|0|10|C|6|P|1|1S|L|2|2M|H|3|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|F|3|G|5|H|7|16|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@$9|1A|A|1B|1|1C]|$9|1D|A|1E|1|1F]|$9|1G|A|1H|1|1I]]|E|$]]|$1|M|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]|W|$5|P|Q|R|E|$S|X]]|Y|$5|P|Q|R|E|$S|Z]]]]

You can use the <code>parse</code> method from the <a href="http://nodejs.org/api/url.html" rel="noreferrer">URL module</a> in the request callback. 

<pre><code>var http = require('http');
var url = require('url');

// Configure our HTTP server to respond with Hello World to all requests.
var server = http.createServer(function (request, response) {
 var queryData = url.parse(request.url, true).query;
 response.writeHead(200, {"Content-Type": "text/plain"});

 if (queryData.name) {
 // user told us their name in the GET request, ex: http://host:8000/?name=Tom
 response.end('Hello ' + queryData.name + '\n');

 } else {
 response.end("Hello World\n");
 }
});

// Listen on port 8000, IP defaults to 127.0.0.1
server.listen(8000);
</code></pre>

I suggest you read the <a href="http://nodejs.org/docs/latest/api/http.html" rel="noreferrer">HTTP module documentation</a> to get an idea of what you get in the <code>createServer</code> callback. You should also take a look at sites like <a href="http://howtonode.org/" rel="noreferrer">http://howtonode.org/</a> and checkout the <a href="http://expressjs.com/" rel="noreferrer">Express framework</a> to get started with Node faster.

blocks|key|699289|text|还有QueryString+module的parse()方法：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|699290|var+http+=+require('http'),
++++queryString+=+require('querystring');

http.createServer(function+(oRequest,+oResponse)+{

++++var+oQueryParams;

++++//+get+query+params+as+object
++++if+(oRequest.url.indexOf('?')+>=+0)+{
++++++++oQueryParams+=+queryString.parse(oRequest.url.replace(/%5E.*\?/,+''));

++++++++//+do+stuff
++++++++console.log(oQueryParams);
++++}

++++oResponse.writeHead(200,+{'Content-Type':+'text/plain'});
++++oResponse.end('Hello+world.');

}).listen(1337,+'127.0.0.1');|code-block|syntax|javascript|699291|entityMap|0|LINK|mutability|MUTABLE|url|http://nodejs.org/api/querystring.html^0|L|7|2|I|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

There's also the <a href="http://nodejs.org/api/querystring.html" rel="noreferrer">QueryString module</a>'s <code>parse()</code> method:

<pre><code>var http = require('http'),
 queryString = require('querystring');

http.createServer(function (oRequest, oResponse) {

 var oQueryParams;

 // get query params as object
 if (oRequest.url.indexOf('?') &gt;= 0) {
 oQueryParams = queryString.parse(oRequest.url.replace(/^.*\?/, ''));

 // do stuff
 console.log(oQueryParams);
 }

 oResponse.writeHead(200, {'Content-Type': 'text/plain'});
 oResponse.end('Hello world.');

}).listen(1337, '127.0.0.1');
</code></pre>

blocks|key|699296|text|require('url').parse('/status?name=ryan',+{parseQueryString:+true}).query|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|699297|返回|unstyled|699298|{+name:+'ryan'+}|699299|参考：https://nodejs.org/api/url.html#url_urlobject_query|offset|length|699300|entityMap|0|LINK|mutability|MUTABLE|url|https://nodejs.org/api/url.html#url_urlobject_query^0|0|0|0|3|1F|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|V|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|F|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

<pre><code>require('url').parse('/status?name=ryan', {parseQueryString: true}).query
</code></pre>

returns

<pre><code>{ name: 'ryan' }
</code></pre>

ref: <a href="https://nodejs.org/api/url.html#url_urlobject_query" rel="noreferrer">https://nodejs.org/api/url.html#url_urlobject_query</a>

blocks|key|483498|text|从Node.js+11开始，url.parse和Legacy+URL+API的其他方法是deprecated的(最初只在文档中)，支持standardized+WHATWG+URL+API。新的API不提供将查询字符串解析为对象的功能。这可以使用querystring.parse方法来实现：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|483499|//+Load+modules+to+create+an+http+server,+parse+a+URL+and+parse+a+URL+query.
const+http+=+require('http');
const+{+URL+}+=+require('url');
const+{+parse:+parseQuery+}+=+require('querystring');

//+Provide+the+origin+for+relative+URLs+sent+to+Node.js+requests.
const+serverOrigin+=+'http://localhost:8000';

//+Configure+our+HTTP+server+to+respond+to+all+requests+with+a+greeting.
const+server+=+http.createServer((request,+response)+=>+{
++//+Parse+the+request+URL.+Relative+URLs+require+an+origin+explicitly.
++const+url+=+new+URL(request.url,+serverOrigin);
++//+Parse+the+URL+query.+The+leading+'?'+has+to+be+removed+before+this.
++const+query+=+parseQuery(url.search.substr(1));
++response.writeHead(200,+{+'Content-Type':+'text/plain'+});
++response.end(`Hello,+${query.name}!\n`);
});

//+Listen+on+port+8000,+IP+defaults+to+127.0.0.1.
server.listen(8000);

//+Print+a+friendly+message+on+the+terminal.
console.log(`Server+running+at+${serverOrigin}/`);|code-block|syntax|javascript|483500|如果您运行上面的脚本，您可以像这样测试服务器响应，例如：|483501|curl+-q+http://localhost:8000/status?name=ryan
Hello,+ryan!|483502|entityMap|0|LINK|mutability|MUTABLE|url|https://nodejs.org/api/url.html#url_url_parse_urlstring_parsequerystring_slashesdenotehost|1|https://nodejs.org/api/url.html#url_legacy_url_api|2|https://nodejs.org/api/deprecations.html#deprecations_dep0116_legacy_url_api|3|https://url.spec.whatwg.org/|4|https://nodejs.org/api/url.html#url_the_whatwg_url_api|5|https://nodejs.org/api/querystring.html#querystring_querystring_parse_str_sep_eq_options^0|E|9|0|O|E|1|18|A|2|1V|C|3|28|E|4|3F|H|5|0|0|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@$A|15|B|16|1|17]|$A|18|B|19|1|1A]|$A|1B|B|1C|1|1D]|$A|1E|B|1F|1|1G]|$A|1H|B|1I|1|1J]|$A|1K|B|1L|1|1M]]|C|$]]|$1|D|3|E|5|F|7|1N|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|1O|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|1P|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|1Q|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]|W|$5|P|Q|R|C|$S|X]]|Y|$5|P|Q|R|C|$S|Z]]|10|$5|P|Q|R|C|$S|11]]|12|$5|P|Q|R|C|$S|13]]]]

Starting with Node.js 11, the <a href="https://nodejs.org/api/url.html#url_url_parse_urlstring_parsequerystring_slashesdenotehost" rel="noreferrer">url.parse</a> and other methods of the <a href="https://nodejs.org/api/url.html#url_legacy_url_api" rel="noreferrer">Legacy URL API</a> were <a href="https://nodejs.org/api/deprecations.html#deprecations_dep0116_legacy_url_api" rel="noreferrer">deprecated</a> (only in the documentation, at first) in favour of the <a href="https://url.spec.whatwg.org/" rel="noreferrer">standardized</a> <a href="https://nodejs.org/api/url.html#url_the_whatwg_url_api" rel="noreferrer">WHATWG URL API</a>. The new API does not offer parsing the query string into an object. That can be achieved using tthe <a href="https://nodejs.org/api/querystring.html#querystring_querystring_parse_str_sep_eq_options" rel="noreferrer">querystring.parse</a> method:
<pre class="lang-js prettyprint-override"><code>// Load modules to create an http server, parse a URL and parse a URL query.
const http = require('http');
const { URL } = require('url');
const { parse: parseQuery } = require('querystring');

// Provide the origin for relative URLs sent to Node.js requests.
const serverOrigin = 'http://localhost:8000';

// Configure our HTTP server to respond to all requests with a greeting.
const server = http.createServer((request, response) =&gt; {
 // Parse the request URL. Relative URLs require an origin explicitly.
 const url = new URL(request.url, serverOrigin);
 // Parse the URL query. The leading '?' has to be removed before this.
 const query = parseQuery(url.search.substr(1));
 response.writeHead(200, { 'Content-Type': 'text/plain' });
 response.end(`Hello, ${query.name}!\n`);
});

// Listen on port 8000, IP defaults to 127.0.0.1.
server.listen(8000);

// Print a friendly message on the terminal.
console.log(`Server running at ${serverOrigin}/`);
</code></pre>
If you run the script above, you can test the server response like this, for example:
<pre class="lang-sh prettyprint-override"><code>curl -q http://localhost:8000/status?name=ryan
Hello, ryan!
</code></pre>

In this "Hello World" example:

<pre><code>// Load the http module to create an http server.
var http = require('http');

// Configure our HTTP server to respond with Hello World to all requests.
var server = http.createServer(function (request, response) {
 response.writeHead(200, {"Content-Type": "text/plain"});
 response.end("Hello World\n");
});

// Listen on port 8000, IP defaults to 127.0.0.1
server.listen(8000);

// Put a friendly message on the terminal
console.log("Server running at http://127.0.0.1:8000/");
</code></pre>

How can I get the parameters from the query string?

<pre><code>http://127.0.0.1:8000/status?name=ryan
</code></pre>

In the documentation, they mentioned:

<pre><code>node&gt; require('url').parse('/status?name=ryan', true)
{ href: '/status?name=ryan'
, search: '?name=ryan'
, query: { name: 'ryan' }
, pathname: '/status'
}
</code></pre>

But I did not understand how to use it. Could anyone explain?

Parsing Query String in node.js

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在这个"Hello World“示例中：// Load the http module to create an http server.var http = require('http');// Configure our HTTP server to respond with Hello World to all ...

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