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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// Query String Utilities
var QueryString = exports;
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var urlDecode = process.binding('http_parser').urlDecode;
// If obj.hasOwnProperty has been overridden, then calling
// obj.hasOwnProperty(prop) will break.
// See: https://github.com/joyent/node/issues/1707
function hasOwnProperty(obj, prop) {
return Object.prototype.hasOwnProperty.call(obj, prop);
}
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function charCode(c) {
return c.charCodeAt(0);
}
// a safe fast alternative to decodeURIComponent
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QueryString.unescapeBuffer = function(s, decodeSpaces) {
var out = new Buffer(s.length);
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var state = 'CHAR'; // states: CHAR, HEX0, HEX1
var n, m, hexchar;
for (var inIndex = 0, outIndex = 0; inIndex <= s.length; inIndex++) {
var c = s.charCodeAt(inIndex);
switch (state) {
case 'CHAR':
switch (c) {
case charCode('%'):
n = 0;
m = 0;
state = 'HEX0';
break;
case charCode('+'):
if (decodeSpaces) c = charCode(' ');
// pass thru
default:
out[outIndex++] = c;
break;
}
break;
case 'HEX0':
state = 'HEX1';
hexchar = c;
if (charCode('0') <= c && c <= charCode('9')) {
n = c - charCode('0');
} else if (charCode('a') <= c && c <= charCode('f')) {
n = c - charCode('a') + 10;
} else if (charCode('A') <= c && c <= charCode('F')) {
n = c - charCode('A') + 10;
} else {
out[outIndex++] = charCode('%');
out[outIndex++] = c;
state = 'CHAR';
break;
}
break;
case 'HEX1':
state = 'CHAR';
if (charCode('0') <= c && c <= charCode('9')) {
m = c - charCode('0');
} else if (charCode('a') <= c && c <= charCode('f')) {
m = c - charCode('a') + 10;
} else if (charCode('A') <= c && c <= charCode('F')) {
m = c - charCode('A') + 10;
} else {
out[outIndex++] = charCode('%');
out[outIndex++] = hexchar;
out[outIndex++] = c;
break;
}
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out[outIndex++] = 16 * n + m;
break;
}
}
// TODO support returning arbitrary buffers.
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return out.slice(0, outIndex - 1);
};
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QueryString.unescape = function(s, decodeSpaces) {
return QueryString.unescapeBuffer(s, decodeSpaces).toString();
};
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QueryString.escape = function(str) {
return encodeURIComponent(str);
};
var stringifyPrimitive = function(v) {
switch (typeof v) {
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case 'string':
return v;
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case 'boolean':
return v ? 'true' : 'false';
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case 'number':
return isFinite(v) ? v : '';
default:
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return '';
}
};
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QueryString.stringify = QueryString.encode = function(obj, sep, eq, name) {
sep = sep || '&';
eq = eq || '=';
obj = (obj === null) ? undefined : obj;
switch (typeof obj) {
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case 'object':
return Object.keys(obj).map(function(k) {
if (Array.isArray(obj[k])) {
return obj[k].map(function(v) {
return QueryString.escape(stringifyPrimitive(k)) +
eq +
QueryString.escape(stringifyPrimitive(v));
}).join(sep);
} else {
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return QueryString.escape(stringifyPrimitive(k)) +
eq +
QueryString.escape(stringifyPrimitive(obj[k]));
}
}).join(sep);
default:
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if (!name) return '';
return QueryString.escape(stringifyPrimitive(name)) + eq +
QueryString.escape(stringifyPrimitive(obj));
}
};
// Parse a key=val string.
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QueryString.parse = QueryString.decode = function(qs, sep, eq) {
sep = sep || '&';
eq = eq || '=';
var obj = {};
if (typeof qs !== 'string' || qs.length === 0) {
return obj;
}
qs.split(sep).forEach(function(kvp) {
var x = kvp.split(eq);
var k = QueryString.unescape(x[0], true);
var v = QueryString.unescape(x.slice(1).join(eq), true);
if (!hasOwnProperty(obj, k)) {
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obj[k] = v;
} else if (!Array.isArray(obj[k])) {
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obj[k] = [obj[k], v];
} else {
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obj[k].push(v);
}
});
return obj;
};