The querystring. parse method in node. js is described in node. jsurl. parse.

The querystring. parse method in node. js is described in node. jsurl. parse.

Method description:

Converts a string to an object. To put it bluntly, the parameter string on the url is converted into an array object. (See the example)

Syntax:

Copy codeThe Code is as follows:
Querystring. parse (str, [sep], [eq], [options])

Receiving parameters:

Str string to be converted

Set the separator for sep. The default value is '&'

The eq value assignment operator. The default value is '='

[Options] maximum length of a maxKeys acceptable string, 1000 by default

Example:

Copy codeThe Code is as follows:
Querystring. parse ('foo = bar & baz = qux & baz = quux & corge ')
// Returns
{Foo: 'bar', baz: ['qux', 'quux '], corge :''}

Source code:

Copy codeThe Code is as follows:

// Parse a key = val string.
QueryString. parse = QueryString. decode = function (qs, sep, eq, options ){
Sep = sep | '&';
Eq = eq | '= ';
Var obj = {};
If (! Util. isString (qs) | qs. length = 0 ){
Return obj;
}
Var regexp =/\ +/g;
Qs = qs. split (sep );
Var maxKeys = 1000;
If (options & util. isNumber (options. maxKeys )){
MaxKeys = options. maxKeys;
}
Var len = qs. length;
// MaxKeys <= 0 means that we shocould not limit keys count
If (maxKeys> 0 & len> maxKeys ){
Len = maxKeys;
}
For (var I = 0; I <len; ++ I ){
Var x = qs [I]. replace (regexp, '% 20 '),
Idx = x. indexOf (eq ),
Kstr, vstr, k, v;
If (idx> = 0 ){
Kstr = x. substr (0, idx );
Vstr = x. substr (idx + 1 );
} Else {
Kstr = x;
Vstr = '';
}
Try {
K = decodeURIComponent (kstr );
V = decodeURIComponent (vstr );
} Catch (e ){
K = QueryString. unescape (kstr, true );
V = QueryString. unescape (vstr, true );
}
If (! HasOwnProperty (obj, k )){
Obj [k] = v;
} Else if (util. isArray (obj [k]) {
Obj [k]. push (v );
} Else {
Obj [k] = [obj [k], v];
}
}
Return obj;
};