gt.js

"v0.4.6 Geetest Inc.";

(function (window) {
    "use strict";
    if (typeof window === 'undefined') {
        throw new Error('Geetest requires browser environment');
    }

var document = window.document;
var Math = window.Math;
var head = document.getElementsByTagName("head")[0];

function _Object(obj) {
    this._obj = obj;
}

_Object.prototype = {
    _each: function (process) {
        var _obj = this._obj;
        for (var k in _obj) {
            if (_obj.hasOwnProperty(k)) {
                process(k, _obj[k]);
            }
        }
        return this;
    }
};

function Config(config) {
    var self = this;
    new _Object(config)._each(function (key, value) {
        self[key] = value;
    });
}

Config.prototype = {
    api_server: 'api.geetest.com',
    protocol: 'http://',
    typePath: '/gettype.php',
    fallback_config: {
        slide: {
            static_servers: ["static.geetest.com", "dn-staticdown.qbox.me"],
            type: 'slide',
            slide: '/static/js/geetest.0.0.0.js'
        },
        fullpage: {
            static_servers: ["static.geetest.com", "dn-staticdown.qbox.me"],
            type: 'fullpage',
            fullpage: '/static/js/fullpage.0.0.0.js'
        }
    },
    _get_fallback_config: function () {
        var self = this;
        if (isString(self.type)) {
            return self.fallback_config[self.type];
        } else if (self.new_captcha) {
            return self.fallback_config.fullpage;
        } else {
            return self.fallback_config.slide;
        }
    },
    _extend: function (obj) {
        var self = this;
        new _Object(obj)._each(function (key, value) {
            self[key] = value;
        })
    }
};
var isNumber = function (value) {
    return (typeof value === 'number');
};
var isString = function (value) {
    return (typeof value === 'string');
};
var isBoolean = function (value) {
    return (typeof value === 'boolean');
};
var isObject = function (value) {
    return (typeof value === 'object' && value !== null);
};
var isFunction = function (value) {
    return (typeof value === 'function');
};

var callbacks = {};
var status = {};

var random = function () {
    return parseInt(Math.random() * 10000) + (new Date()).valueOf();
};

var loadScript = function (url, cb) {
    var script = document.createElement("script");
    script.charset = "UTF-8";
    script.async = true;

    script.onerror = function () {
        cb(true);
    };
    var loaded = false;
    script.onload = script.onreadystatechange = function () {
        if (!loaded &&
            (!script.readyState ||
            "loaded" === script.readyState ||
            "complete" === script.readyState)) {

            loaded = true;
            setTimeout(function () {
                cb(false);
            }, 0);
        }
    };
    script.src = url;
    head.appendChild(script);
};

var normalizeDomain = function (domain) {
    // special domain: uems.sysu.edu.cn/jwxt/geetest/
    // return domain.replace(/^https?:\/\/|\/.*$/g, ''); uems.sysu.edu.cn
    return domain.replace(/^https?:\/\/|\/$/g, ''); // uems.sysu.edu.cn/jwxt/geetest
};
var normalizePath = function (path) {
    path = path.replace(/\/+/g, '/');
    if (path.indexOf('/') !== 0) {
        path = '/' + path;
    }
    return path;
};
var normalizeQuery = function (query) {
    if (!query) {
        return '';
    }
    var q = '?';
    new _Object(query)._each(function (key, value) {
        if (isString(value) || isNumber(value) || isBoolean(value)) {
            q = q + encodeURIComponent(key) + '=' + encodeURIComponent(value) + '&';
        }
    });
    if (q === '?') {
        q = '';
    }
    return q.replace(/&$/, '');
};
var makeURL = function (protocol, domain, path, query) {
    domain = normalizeDomain(domain);

    var url = normalizePath(path) + normalizeQuery(query);
    if (domain) {
        url = protocol + domain + url;
    }

    return url;
};

var load = function (protocol, domains, path, query, cb) {
    var tryRequest = function (at) {

        var url = makeURL(protocol, domains[at], path, query);
        loadScript(url, function (err) {
            if (err) {
                if (at >= domains.length - 1) {
                    cb(true);
                } else {
                    tryRequest(at + 1);
                }
            } else {
                cb(false);
            }
        });
    };
    tryRequest(0);
};


var jsonp = function (domains, path, config, callback) {
    if (isObject(config.getLib)) {
        config._extend(config.getLib);
        callback(config);
        return;
    }
    if (config.offline) {
        callback(config._get_fallback_config());
        return;
    }

    var cb = "geetest_" + random();
    window[cb] = function (data) {
        if (data.status == 'success') {
            callback(data.data);
        } else if (!data.status) {
            callback(data);
        } else {
            callback(config._get_fallback_config());
        }
        window[cb] = undefined;
        try {
            delete window[cb];
        } catch (e) {
        }
    };
    load(config.protocol, domains, path, {
        gt: config.gt,
        callback: cb
    }, function (err) {
        if (err) {
            callback(config._get_fallback_config());
        }
    });
};

var throwError = function (errorType, config) {
    var errors = {
        networkError: ' ',
        gtTypeError: 'gt '
    };
    if (typeof config.onError === 'function') {
        config.onError(errors[errorType]);
    } else {
        throw new Error(errors[errorType]);
    }
};

var detect = function () {
    return window.Geetest || document.getElementById("gt_lib");
};

if (detect()) {
    status.slide = "loaded";
}

window.initGeetest = function (userConfig, callback) {

    var config = new Config(userConfig);

    if (userConfig.https) {
        config.protocol = 'https://';
    } else if (!userConfig.protocol) {
        config.protocol = window.location.protocol + '//';
    }

    // for KFC
    if (userConfig.gt === '050cffef4ae57b5d5e529fea9540b0d1' ||
        userConfig.gt === '3bd38408ae4af923ed36e13819b14d42') {
        config.apiserver = 'yumchina.geetest.com/'; // for old js
        config.api_server = 'yumchina.geetest.com';
    }

    if (isObject(userConfig.getType)) {
        config._extend(userConfig.getType);
    }
    jsonp([config.api_server || config.apiserver], config.typePath, config, function (newConfig) {
        var type = newConfig.type;
        var init = function () {
            config._extend(newConfig);
            callback(new window.Geetest(config));
        };

        callbacks[type] = callbacks[type] || [];
        var s = status[type] || 'init';
        if (s === 'init') {
            status[type] = 'loading';

            callbacks[type].push(init);

            load(config.protocol, newConfig.static_servers || newConfig.domains, newConfig[type] || newConfig.path, null, function (err) {
                if (err) {
                    status[type] = 'fail';
                    throwError('networkError', config);
                } else {
                    status[type] = 'loaded';
                    var cbs = callbacks[type];
                    for (var i = 0, len = cbs.length; i < len; i = i + 1) {
                        var cb = cbs[i];
                        if (isFunction(cb)) {
                            cb();
                        }
                    }
                    callbacks[type] = [];
                }
            });
        } else if (s === "loaded") {
            init();
        } else if (s === "fail") {
            throwError('networkError', config);
        } else if (s === "loading") {
            callbacks[type].push(init);
        }
    });

};


})(window);