iD/js/lib/ohauth.js

(function(context) {

var ohauth = {};

ohauth.qsString = function(obj) {
    return Object.keys(obj).sort().map(function(key) {
        return encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]);
    }).join('&');
};

ohauth.stringQs = function(str) {
    return str.split('&').reduce(function(obj, pair){
        var parts = pair.split('=');
        obj[parts[0]] = (null === parts[1]) ? '' : decodeURIComponent(parts[1]);
        return obj;
    }, {});
};

ohauth.post = function(url, data, callback) {
    var xhr = new XMLHttpRequest();
    xhr.onreadystatechange = function() {
        if (4 == xhr.readyState && 0 !== xhr.status) callback(xhr);
    };
    xhr.open('POST', url, true);
    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xhr.send(data);
};

ohauth.nonce = function() {
    for (var o = ''; o.length < 6;) {
        o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
    }
    return o;
};

ohauth.timestamp = function() { return ~~((+new Date()) / 1000); };

ohauth.percentEncode = function(s) {
    return encodeURIComponent(s)
    .replace(/\!/g, '%21').replace(/\'/g, '%27')
    .replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
};

ohauth.baseString = function(method, url, params) {
    return [
        method,
        ohauth.percentEncode(url),
        ohauth.percentEncode(ohauth.qsString(params))].join('&');
};

context.ohauth = ohauth;

})(this);