How come I can't url encode this URL in node.js?

$node
querystring = require('querystring')
var dict = { 'q': 'what\'s up' };
var url = 'http://google.com/?q=' + querystring.stringify(dict);
url = encodeURIComponent(url);
console.log(ur开发者_运维问答l);

The result is this:

"http://google.com/?q=q=what's%20up"

Notice how the single quote is not encoded correctly. Is there something wrong with the node.js module?

The ' is allowed in plain in the URI query. Here are the corresponding production rules for the URI query as per RFC 3986:

query         = *( pchar / "/" / "?" )
pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"
pct-encoded   = "%" HEXDIG HEXDIG
sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"
              / "*" / "+" / "," / ";" / "="

As you can see, sub-delims contains a plain '. So the result is valid.

it is encoded correctly, if you type the same query into google sear field manually you will get this address:

http://www.google.cz/#hl=cs&cp=8&gs_id=u&xhr=t&q=what's+up&pf=p&sclient=psy&site=&source=hp&pbx=1&oq=what's+u&aq=0&aqi=g5&aql=&gs_sm=&gs_upl=&bav=on.2,or.r_gc.r_pw.&fp=792ecf51920895b2&biw=1276&bih=683

note that &q=what's+up& part

and encodeURIComponent is not a Node.js module, but part of standard javascript library

https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/encodeURIComponent

manual workaround:

$node
querystring = require('querystring')
var dict = { 'q': 'what\'s up' };
var url = 'http://google.com/?q=' + querystring.stringify(dict);
url = encodeURIComponent(url);
url = url.replace(/'/g,"%27");