/*global plupload ,mOxie*/
/*global ActiveXObject */
/*exported Qiniu */

function QiniuJsSDK() {


    this.detectIEVersion = function() {
        var v = 4,
            div = document.createElement('div'),
            all = div.getElementsByTagName('i');
        while (
            div.innerHTML = '<!--[if gt IE ' + v + ']><i></i><![endif]-->',
            all[0]
        ) {
            v++;
        }
        return v > 4 ? v : false;
    };

    this.isImage = function(url) {
        var res, suffix = "";
        var imageSuffixes = ["png", "jpg", "jpeg", "gif", "bmp"];
        var suffixMatch = /\.([a-zA-Z0-9]+)(\?|\@|$)/;

        if (!url || !suffixMatch.test(url)) {
            return false;
        }
        res = suffixMatch.exec(url);
        suffix = res[1].toLowerCase();
        for (var i = 0, l = imageSuffixes.length; i < l; i++) {
            if (suffix === imageSuffixes[i]) {
                return true;
            }
        }
        return false;
    };

    this.getFileExtension = function(filename) {
        var tempArr = filename.split(".");
        var ext;
        if (tempArr.length === 1 || (tempArr[0] === "" && tempArr.length === 2)) {
            ext = "";
        } else {
            ext = tempArr.pop().toLowerCase(); //get the extension and make it lower-case
        }
        return ext;
    };

    this.utf8_encode = function(argString) {
        // http://kevin.vanzonneveld.net
        // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
        // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
        // +   improved by: sowberry
        // +    tweaked by: Jack
        // +   bugfixed by: Onno Marsman
        // +   improved by: Yves Sucaet
        // +   bugfixed by: Onno Marsman
        // +   bugfixed by: Ulrich
        // +   bugfixed by: Rafal Kukawski
        // +   improved by: kirilloid
        // +   bugfixed by: kirilloid
        // *     example 1: this.utf8_encode('Kevin van Zonneveld');
        // *     returns 1: 'Kevin van Zonneveld'

        if (argString === null || typeof argString === 'undefined') {
            return '';
        }

        var string = (argString + ''); // .replace(/\r\n/g, '\n').replace(/\r/g, '\n');
        var utftext = '',
            start, end, stringl = 0;

        start = end = 0;
        stringl = string.length;
        for (var n = 0; n < stringl; n++) {
            var c1 = string.charCodeAt(n);
            var enc = null;

            if (c1 < 128) {
                end++;
            } else if (c1 > 127 && c1 < 2048) {
                enc = String.fromCharCode(
                    (c1 >> 6) | 192, (c1 & 63) | 128
                );
            } else if (c1 & 0xF800 ^ 0xD800 > 0) {
                enc = String.fromCharCode(
                    (c1 >> 12) | 224, ((c1 >> 6) & 63) | 128, (c1 & 63) | 128
                );
            } else { // surrogate pairs
                if (c1 & 0xFC00 ^ 0xD800 > 0) {
                    throw new RangeError('Unmatched trail surrogate at ' + n);
                }
                var c2 = string.charCodeAt(++n);
                if (c2 & 0xFC00 ^ 0xDC00 > 0) {
                    throw new RangeError('Unmatched lead surrogate at ' + (n - 1));
                }
                c1 = ((c1 & 0x3FF) << 10) + (c2 & 0x3FF) + 0x10000;
                enc = String.fromCharCode(
                    (c1 >> 18) | 240, ((c1 >> 12) & 63) | 128, ((c1 >> 6) & 63) | 128, (c1 & 63) | 128
                );
            }
            if (enc !== null) {
                if (end > start) {
                    utftext += string.slice(start, end);
                }
                utftext += enc;
                start = end = n + 1;
            }
        }

        if (end > start) {
            utftext += string.slice(start, stringl);
        }

        return utftext;
    };

    this.base64_encode = function(data) {
        // http://kevin.vanzonneveld.net
        // +   original by: Tyler Akins (http://rumkin.com)
        // +   improved by: Bayron Guevara
        // +   improved by: Thunder.m
        // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
        // +   bugfixed by: Pellentesque Malesuada
        // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
        // -    depends on: this.utf8_encode
        // *     example 1: this.base64_encode('Kevin van Zonneveld');
        // *     returns 1: 'S2V2aW4gdmFuIFpvbm5ldmVsZA=='
        // mozilla has this native
        // - but breaks in 2.0.0.12!
        //if (typeof this.window['atob'] == 'function') {
        //    return atob(data);
        //}
        var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
        var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,
            ac = 0,
            enc = '',
            tmp_arr = [];

        if (!data) {
            return data;
        }

        data = this.utf8_encode(data + '');

        do { // pack three octets into four hexets
            o1 = data.charCodeAt(i++);
            o2 = data.charCodeAt(i++);
            o3 = data.charCodeAt(i++);

            bits = o1 << 16 | o2 << 8 | o3;

            h1 = bits >> 18 & 0x3f;
            h2 = bits >> 12 & 0x3f;
            h3 = bits >> 6 & 0x3f;
            h4 = bits & 0x3f;

            // use hexets to index into b64, and append result to encoded string
            tmp_arr[ac++] = b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
        } while (i < data.length);

        enc = tmp_arr.join('');

        switch (data.length % 3) {
            case 1:
                enc = enc.slice(0, -2) + '==';
                break;
            case 2:
                enc = enc.slice(0, -1) + '=';
                break;
        }

        return enc;
    };

    this.URLSafeBase64Encode = function(v) {
        v = this.base64_encode(v);
        return v.replace(/\//g, '_').replace(/\+/g, '-');
    };

    this.createAjax = function(argument) {
        var xmlhttp = {};
        if (window.XMLHttpRequest) {
            xmlhttp = new XMLHttpRequest();
        } else {
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        return xmlhttp;
    };

    this.parseJSON = function(data) {
        // Attempt to parse using the native JSON parser first
        if (window.JSON && window.JSON.parse) {
            return window.JSON.parse(data);
        }

        if (data === null) {
            return data;
        }
        if (typeof data === "string") {

            // Make sure leading/trailing whitespace is removed (IE can't handle it)
            data = this.trim(data);

            if (data) {
                // Make sure the incoming data is actual JSON
                // Logic borrowed from http://json.org/json2.js
                if (/^[\],:{}\s]*$/.test(data.replace(/\\(?:["\\\/bfnrt]|u[\da-fA-F]{4})/g, "@").replace(/"[^"\\\r\n]*"|true|false|null|-?(?:\d+\.|)\d+(?:[eE][+-]?\d+|)/g, "]").replace(/(?:^|:|,)(?:\s*\[)+/g, ""))) {

                    return (function() {
                        return data;
                    })();
                }
            }
        }
    };

    this.trim = function(text) {
        return text === null ? "" : this.trim.call(text);
    };

    //Todo ie7 handler / this.parseJSON bug;

    var that = this;

    this.uploader = function(op) {
        if (!op.domain) {
            throw 'uptoken_url or domain is required!';
        }

        if (!op.browse_button) {
            throw 'browse_button is required!';
        }

        var option = {};

        var _Error_Handler = op.init && op.init.Error;
        var _FileUploaded_Handler = op.init && op.init.FileUploaded;

        op.init.Error = function() {};
        op.init.FileUploaded = function() {};

        that.uptoken_url = op.uptoken_url;
        that.token = '';
        that.key_handler = typeof op.init.Key === 'function' ? op.init.Key : '';
        this.domain = op.domain;
        var ctx = '';

        var reset_chunk_size = function() {
            var ie = that.detectIEVersion();
            var BLOCK_BITS, MAX_CHUNK_SIZE, chunk_size;
            var isSpecialSafari = (mOxie.Env.browser === "Safari" && mOxie.Env.version <= 5 && mOxie.Env.os === "Windows" && mOxie.Env.osVersion === "7") || (mOxie.Env.browser === "Safari" && mOxie.Env.os === "iOS" && mOxie.Env.osVersion === "7");
            if (ie && ie <= 9 && op.chunk_size && op.runtimes.indexOf('flash') >= 0) {
                //  link: http://www.plupload.com/docs/Frequently-Asked-Questions#when-to-use-chunking-and-when-not
                //  when plupload chunk_size setting is't null ,it cause bug in ie8/9  which runs  flash runtimes (not support html5) .
                op.chunk_size = 0;

            } else if (isSpecialSafari) {
                // win7 safari / iOS7 safari have bug when in chunk upload mode
                // reset chunk_size to 0
                // disable chunk in special version safari
                op.chunk_size = 0;
            } else {
                BLOCK_BITS = 20;
                MAX_CHUNK_SIZE = 4 << BLOCK_BITS; //4M

                chunk_size = plupload.parseSize(op.chunk_size);
                if (chunk_size > MAX_CHUNK_SIZE) {
                    op.chunk_size = MAX_CHUNK_SIZE;
                }
                // qiniu service  max_chunk_size is 4m
                // reset chunk_size to max_chunk_size(4m) when chunk_size > 4m
            }
        };
        reset_chunk_size();

        var getUpToken = function() {
            if (!op.uptoken) {
                var ajax = that.createAjax();
                ajax.open('GET', that.uptoken_url, true);
                ajax.setRequestHeader("If-Modified-Since", "0");
                ajax.onreadystatechange = function() {
                    if (ajax.readyState === 4 && ajax.status === 200) {
                        var res = that.parseJSON(ajax.responseText);
                        that.token = res.uptoken;
                    }
                };
                ajax.send();
            } else {
                that.token = op.uptoken;
            }
        };

        var getFileKey = function(up, file, func) {
            var key = '',
                unique_names = false;
            if (!op.save_key) {
                unique_names = up.getOption && up.getOption('unique_names');
                unique_names = unique_names || (up.settings && up.settings.unique_names);
                if (unique_names) {
                    var ext = that.getFileExtension(file.name);
                    key = ext ? file.id + '.' + ext : file.id;
                } else if (typeof func === 'function') {
                    key = func(up, file);
                } else {
                    key = file.name;
                }
            }
            return key;
        };

        plupload.extend(option, op, {
            url: 'http://up.qiniu.com',
            multipart_params: {
                token: ''
            }
        });

        var uploader = new plupload.Uploader(option);

        uploader.bind('Init', function(up, params) {
            getUpToken();
        });
        uploader.init();

        uploader.bind('FilesAdded', function(up, files) {
            var auto_start = up.getOption && up.getOption('auto_start');
            auto_start = auto_start || (up.settings && up.settings.auto_start);
            if (auto_start) {
                plupload.each(files, function(i, file) {
                    up.start();
                });
            }
            up.refresh(); // Reposition Flash/Silverlight
        });

        uploader.bind('BeforeUpload', function(up, file) {

            ctx = '';

            var directUpload = function(up, file, func) {

                var multipart_params_obj;
                if (op.save_key) {
                    multipart_params_obj = {
                        'token': that.token
                    };
                } else {
                    multipart_params_obj = {
                        'key': getFileKey(up, file, func),
                        'token': that.token
                    };
                }

                var x_vars = op.x_vars;
                if (x_vars !== undefined && typeof x_vars === 'object') {
                    for (var x_key in x_vars) {
                        if (x_vars.hasOwnProperty(x_key)) {
                            if (typeof x_vars[x_key] === 'function') {
                                multipart_params_obj['x:' + x_key] = x_vars[x_key](up, file);
                            } else if (typeof x_vars[x_key] !== 'object') {
                                multipart_params_obj['x:' + x_key] = x_vars[x_key];
                            }
                        }
                    }
                }


                up.setOption({
                    'url': 'http://up.qiniu.com/',
                    'multipart': true,
                    'chunk_size': undefined,
                    'multipart_params': multipart_params_obj
                });
            };


            var chunk_size = up.getOption && up.getOption('chunk_size');
            chunk_size = chunk_size || (up.settings && up.settings.chunk_size);
            if (uploader.runtime === 'html5' && chunk_size) {
                if (file.size < chunk_size) {
                    directUpload(up, file, that.key_handler);
                } else {
                    var localFileInfo = localStorage.getItem(file.name);
                    var blockSize = chunk_size;
                    if (localFileInfo) {
                        localFileInfo = JSON.parse(localFileInfo);
                        var now = (new Date()).getTime();
                        var before = localFileInfo.time || 0;
                        var aDay = 24 * 60 * 60 * 1000; //  milliseconds
                        if (now - before < aDay) {
                            if (localFileInfo.percent !== 100) {
                                if (file.size === localFileInfo.total) {
                                    file.percent = localFileInfo.percent;
                                    file.loaded = localFileInfo.offset;
                                    ctx = localFileInfo.ctx;
                                    if (localFileInfo.offset + blockSize > file.size) {
                                        blockSize = file.size - localFileInfo.offset;
                                    }
                                } else {
                                    localStorage.removeItem(file.name);
                                }

                            } else {
                                // 进度100%时，删除对应的localStorage，避免 499 bug
                                localStorage.removeItem(file.name);
                            }
                        } else {
                            localStorage.removeItem(file.name);
                        }
                    }
                    up.setOption({
                        'url': 'http://up.qiniu.com/mkblk/' + blockSize,
                        'multipart': false,
                        'chunk_size': chunk_size,
                        'required_features': "chunks",
                        'headers': {
                            'Authorization': 'UpToken ' + that.token
                        },
                        'multipart_params': {}
                    });
                }
            } else {
                directUpload(up, file, that.key_handler);
            }
        });

        uploader.bind('ChunkUploaded', function(up, file, info) {
            var res = that.parseJSON(info.response);

            ctx = ctx ? ctx + ',' + res.ctx : res.ctx;
            var leftSize = info.total - info.offset;
            var chunk_size = up.getOption && up.getOption('chunk_size');
            chunk_size = chunk_size || (up.settings && up.settings.chunk_size);
            if (leftSize < chunk_size) {
                up.setOption({
                    'url': 'http://up.qiniu.com/mkblk/' + leftSize
                });
            }
            localStorage.setItem(file.name, JSON.stringify({
                ctx: ctx,
                percent: file.percent,
                total: info.total,
                offset: info.offset,
                time: (new Date()).getTime()
            }));
        });

        uploader.bind('Error', (function(_Error_Handler) {
            return function(up, err) {
                var errTip = '';
                var file = err.file;
                if (file) {
                    switch (err.code) {
                        case plupload.FAILED:
                            errTip = '上传失败。请稍后再试。';
                            break;
                        case plupload.FILE_SIZE_ERROR:
                            var max_file_size = up.getOption && up.getOption('max_file_size');
                            max_file_size = max_file_size || (up.settings && up.settings.max_file_size);
                            errTip = '浏览器最大可上传' + max_file_size + '。更大文件请使用命令行工具。';
                            break;
                        case plupload.FILE_EXTENSION_ERROR:
                            errTip = '文件验证失败。请稍后重试。';
                            break;
                        case plupload.HTTP_ERROR:
                            var errorObj = that.parseJSON(err.response);
                            var errorText = errorObj.error;
                            switch (err.status) {
                                case 400:
                                    errTip = "请求报文格式错误。";
                                    break;
                                case 401:
                                    errTip = "客户端认证授权失败。请重试或提交反馈。";
                                    break;
                                case 405:
                                    errTip = "客户端请求错误。请重试或提交反馈。";
                                    break;
                                case 579:
                                    errTip = "资源上传成功，但回调失败。";
                                    break;
                                case 599:
                                    errTip = "网络连接异常。请重试或提交反馈。";
                                    break;
                                case 614:
                                    errTip = "文件已存在。";
                                    try {
                                        errorObj = that.parseJSON(errorObj.error);
                                        errorText = errorObj.error || 'file exists';
                                    } catch (e) {
                                        errorText = errorObj.error || 'file exists';
                                    }
                                    break;
                                case 631:
                                    errTip = "指定空间不存在。";
                                    break;
                                case 701:
                                    errTip = "上传数据块校验出错。请重试或提交反馈。";
                                    break;
                                default:
                                    errTip = "未知错误。";
                                    break;
                            }
                            errTip = errTip + '(' + err.status + '：' + errorText + ')';
                            break;
                        case plupload.SECURITY_ERROR:
                            errTip = '安全配置错误。请联系网站管理员。';
                            break;
                        case plupload.GENERIC_ERROR:
                            errTip = '上传失败。请稍后再试。';
                            break;
                        case plupload.IO_ERROR:
                            errTip = '上传失败。请稍后再试。';
                            break;
                        case plupload.INIT_ERROR:
                            errTip = '网站配置错误。请联系网站管理员。';
                            uploader.destroy();
                            break;
                        default:
                            errTip = err.message + err.details;
                            break;
                    }
                    if (_Error_Handler) {
                        _Error_Handler(up, err, errTip);
                    }
                }
                up.refresh(); // Reposition Flash/Silverlight
            };
        })(_Error_Handler));

        uploader.bind('FileUploaded', (function(_FileUploaded_Handler) {
            return function(up, file, info) {

                var last_step = function(up, file, info) {
                    if (op.downtoken_url) {
                        var ajax_downtoken = that.createAjax();
                        ajax_downtoken.open('POST', op.downtoken_url, true);
                        ajax_downtoken.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
                        ajax_downtoken.onreadystatechange = function() {
                            if (ajax_downtoken.readyState === 4) {
                                if (ajax_downtoken.status === 200) {
                                    var res_downtoken;
                                    try {
                                        res_downtoken = that.parseJSON(ajax_downtoken.responseText);
                                    } catch (e) {
                                        throw ('invalid json format');
                                    }
                                    var info_extended = {};
                                    plupload.extend(info_extended, that.parseJSON(info), res_downtoken);
                                    if (_FileUploaded_Handler) {
                                        _FileUploaded_Handler(up, file, JSON.stringify(info_extended));
                                    }
                                } else {
                                    uploader.trigger('Error', {
                                        status: ajax_downtoken.status,
                                        response: ajax_downtoken.responseText,
                                        file: file,
                                        code: plupload.HTTP_ERROR
                                    });
                                }
                            }
                        };
                        ajax_downtoken.send('key=' + that.parseJSON(info).key + '&domain=' + op.domain);
                    } else if (_FileUploaded_Handler) {
                        _FileUploaded_Handler(up, file, info);
                    }
                };

                var res = that.parseJSON(info.response);
                ctx = ctx ? ctx : res.ctx;
                if (ctx) {
                    var key = '';
                    if (!op.save_key) {
                        key = getFileKey(up, file, that.key_handler);
                        key = key ? '/key/' + that.URLSafeBase64Encode(key) : '';
                    }

                    var x_vars = op.x_vars,
                        x_val = '',
                        x_vars_url = '';
                    if (x_vars !== undefined && typeof x_vars === 'object') {
                        for (var x_key in x_vars) {
                            if (x_vars.hasOwnProperty(x_key)) {
                                if (typeof x_vars[x_key] === 'function') {
                                    x_val = that.URLSafeBase64Encode(x_vars[x_key](up, file));
                                } else if (typeof x_vars[x_key] !== 'object') {
                                    x_val = that.URLSafeBase64Encode(x_vars[x_key]);
                                }
                                x_vars_url += '/x:' + x_key + '/' + x_val;
                            }
                        }
                    }

                    var url = 'http://up.qiniu.com/mkfile/' + file.size + key + x_vars_url;
                    var ajax = that.createAjax();
                    ajax.open('POST', url, true);
                    ajax.setRequestHeader('Content-Type', 'text/plain;charset=UTF-8');
                    ajax.setRequestHeader('Authorization', 'UpToken ' + that.token);
                    ajax.onreadystatechange = function() {
                        if (ajax.readyState === 4) {
                            localStorage.removeItem(file.name);
                            if (ajax.status === 200) {
                                var info = ajax.responseText;
                                last_step(up, file, info);
                            } else {
                                uploader.trigger('Error', {
                                    status: ajax.status,
                                    response: ajax.responseText,
                                    file: file,
                                    code: -200
                                });
                            }
                        }
                    };
                    ajax.send(ctx);
                } else {
                    last_step(up, file, info.response);
                }

            };
        })(_FileUploaded_Handler));

        return uploader;
    };

    this.getUrl = function(key) {
        if (!key) {
            return false;
        }
        key = encodeURI(key);
        var domain = this.domain;
        if (domain.slice(domain.length - 1) !== '/') {
            domain = domain + '/';
        }
        return domain + key;
    };

    this.imageView2 = function(op, key) {
        var mode = op.mode || '',
            w = op.w || '',
            h = op.h || '',
            q = op.quality || '',
            format = op.format || '';
        if (!mode) {
            return false;
        }
        if (!w && !h) {
            return false;
        }

        var imageUrl = 'imageView2/' + mode;
        imageUrl += w ? '/w/' + w : '';
        imageUrl += h ? '/h/' + h : '';
        imageUrl += q ? '/q/' + q : '';
        imageUrl += format ? '/format/' + format : '';
        if (key) {
            imageUrl = this.getUrl(key) + '?' + imageUrl;
        }
        return imageUrl;
    };


    this.imageMogr2 = function(op, key) {
        var auto_orient = op['auto-orient'] || '',
            thumbnail = op.thumbnail || '',
            strip = op.strip || '',
            gravity = op.gravity || '',
            crop = op.crop || '',
            quality = op.quality || '',
            rotate = op.rotate || '',
            format = op.format || '',
            blur = op.blur || '';
        //Todo check option

        var imageUrl = 'imageMogr2';

        imageUrl += auto_orient ? '/auto-orient' : '';
        imageUrl += thumbnail ? '/thumbnail/' + thumbnail : '';
        imageUrl += strip ? '/strip' : '';
        imageUrl += gravity ? '/gravity/' + gravity : '';
        imageUrl += quality ? '/quality/' + quality : '';
        imageUrl += crop ? '/crop/' + crop : '';
        imageUrl += rotate ? '/rotate/' + rotate : '';
        imageUrl += format ? '/format/' + format : '';
        imageUrl += blur ? '/blur/' + blur : '';

        if (key) {
            imageUrl = this.getUrl(key) + '?' + imageUrl;
        }
        return imageUrl;
    };

    this.watermark = function(op, key) {

        var mode = op.mode;
        if (!mode) {
            return false;
        }

        var imageUrl = 'watermark/' + mode;

        if (mode === 1) {
            var image = op.image || '';
            if (!image) {
                return false;
            }
            imageUrl += image ? '/image/' + this.URLSafeBase64Encode(image) : '';
        } else if (mode === 2) {
            var text = op.text ? op.text : '',
                font = op.font ? op.font : '',
                fontsize = op.fontsize ? op.fontsize : '',
                fill = op.fill ? op.fill : '';
            if (!text) {
                return false;
            }
            imageUrl += text ? '/text/' + this.URLSafeBase64Encode(text) : '';
            imageUrl += font ? '/font/' + this.URLSafeBase64Encode(font) : '';
            imageUrl += fontsize ? '/fontsize/' + fontsize : '';
            imageUrl += fill ? '/fill/' + this.URLSafeBase64Encode(fill) : '';
        } else {
            // Todo mode3
            return false;
        }

        var dissolve = op.dissolve || '',
            gravity = op.gravity || '',
            dx = op.dx || '',
            dy = op.dy || '';

        imageUrl += dissolve ? '/dissolve/' + dissolve : '';
        imageUrl += gravity ? '/gravity/' + gravity : '';
        imageUrl += dx ? '/dx/' + dx : '';
        imageUrl += dy ? '/dy/' + dy : '';

        if (key) {
            imageUrl = this.getUrl(key) + '?' + imageUrl;
        }
        return imageUrl;

    };

    this.imageInfo = function(key) {
        if (!key) {
            return false;
        }
        var url = this.getUrl(key) + '?imageInfo';
        var xhr = this.createAjax();
        var info;
        var that = this;
        xhr.open('GET', url, false);
        xhr.onreadystatechange = function() {
            if (xhr.readyState === 4 && xhr.status === 200) {
                info = that.parseJSON(xhr.responseText);
            }
        };
        xhr.send();
        return info;
    };


    this.exif = function(key) {
        if (!key) {
            return false;
        }
        var url = this.getUrl(key) + '?exif';
        var xhr = this.createAjax();
        var info;
        var that = this;
        xhr.open('GET', url, false);
        xhr.onreadystatechange = function() {
            if (xhr.readyState === 4 && xhr.status === 200) {
                info = that.parseJSON(xhr.responseText);
            }
        };
        xhr.send();
        return info;
    };

    this.get = function(type, key) {
        if (!key || !type) {
            return false;
        }
        if (type === 'exif') {
            return this.exif(key);
        } else if (type === 'imageInfo') {
            return this.imageInfo(key);
        }
        return false;
    };


    this.pipeline = function(arr, key) {

        var isArray = Object.prototype.toString.call(arr) === '[object Array]';
        var option, errOp, imageUrl = '';
        if (isArray) {
            for (var i = 0, len = arr.length; i < len; i++) {
                option = arr[i];
                if (!option.fop) {
                    return false;
                }
                switch (option.fop) {
                    case 'watermark':
                        imageUrl += this.watermark(option) + '|';
                        break;
                    case 'imageView2':
                        imageUrl += this.imageView2(option) + '|';
                        break;
                    case 'imageMogr2':
                        imageUrl += this.imageMogr2(option) + '|';
                        break;
                    default:
                        errOp = true;
                        break;
                }
                if (errOp) {
                    return false;
                }
            }
            if (key) {
                imageUrl = this.getUrl(key) + '?' + imageUrl;
                var length = imageUrl.length;
                if (imageUrl.slice(length - 1) === '|') {
                    imageUrl = imageUrl.slice(0, length - 1);
                }
            }
            return imageUrl;
        }
        return false;
    };

}

var Qiniu = new QiniuJsSDK();