html2canvas/dist/lib/core/cache-storage.js

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
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};
Object.defineProperty(exports, "__esModule", { value: true });
var features_1 = require("./features");
var logger_1 = require("./logger");
var CacheStorage = /** @class */ (function () {
    function CacheStorage() {
    }
    CacheStorage.create = function (name, options) {
        return (CacheStorage._caches[name] = new Cache(name, options));
    };
    CacheStorage.destroy = function (name) {
        delete CacheStorage._caches[name];
    };
    CacheStorage.open = function (name) {
        var cache = CacheStorage._caches[name];
        if (typeof cache !== 'undefined') {
            return cache;
        }
        throw new Error("Cache with key \"" + name + "\" not found");
    };
    CacheStorage.getOrigin = function (url) {
        var link = CacheStorage._link;
        if (!link) {
            return 'about:blank';
        }
        link.href = url;
        link.href = link.href; // IE9, LOL! - http://jsfiddle.net/niklasvh/2e48b/
        return link.protocol + link.hostname + link.port;
    };
    CacheStorage.isSameOrigin = function (src) {
        return CacheStorage.getOrigin(src) === CacheStorage._origin;
    };
    CacheStorage.setContext = function (window) {
        CacheStorage._link = window.document.createElement('a');
        CacheStorage._origin = CacheStorage.getOrigin(window.location.href);
    };
    CacheStorage.getInstance = function () {
        var current = CacheStorage._current;
        if (current === null) {
            throw new Error("No cache instance attached");
        }
        return current;
    };
    CacheStorage.attachInstance = function (cache) {
        CacheStorage._current = cache;
    };
    CacheStorage.detachInstance = function () {
        CacheStorage._current = null;
    };
    CacheStorage._caches = {};
    CacheStorage._origin = 'about:blank';
    CacheStorage._current = null;
    return CacheStorage;
}());
exports.CacheStorage = CacheStorage;
var Cache = /** @class */ (function () {
    function Cache(id, options) {
        this.id = id;
        this._options = options;
        this._cache = {};
    }
    Cache.prototype.addImage = function (src) {
        var result = Promise.resolve();
        if (this.has(src)) {
            return result;
        }
        if (isBlobImage(src) || isRenderable(src)) {
            this._cache[src] = this.loadImage(src);
            return result;
        }
        return result;
    };
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    Cache.prototype.match = function (src) {
        return this._cache[src];
    };
    Cache.prototype.loadImage = function (key) {
        return __awaiter(this, void 0, void 0, function () {
            var isSameOrigin, useCORS, useProxy, src;
            var _this = this;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        isSameOrigin = CacheStorage.isSameOrigin(key);
                        useCORS = !isInlineImage(key) && this._options.useCORS === true && features_1.FEATURES.SUPPORT_CORS_IMAGES && !isSameOrigin;
                        useProxy = !isInlineImage(key) &&
                            !isSameOrigin &&
                            typeof this._options.proxy === 'string' &&
                            features_1.FEATURES.SUPPORT_CORS_XHR &&
                            !useCORS;
                        if (!isSameOrigin && this._options.allowTaint === false && !isInlineImage(key) && !useProxy && !useCORS) {
                            return [2 /*return*/];
                        }
                        src = key;
                        if (!useProxy) return [3 /*break*/, 2];
                        return [4 /*yield*/, this.proxy(src)];
                    case 1:
                        src = _a.sent();
                        _a.label = 2;
                    case 2:
                        logger_1.Logger.getInstance(this.id).debug("Added image " + key.substring(0, 256));
                        return [4 /*yield*/, new Promise(function (resolve, reject) {
                                var img = new Image();
                                img.onload = function () { return resolve(img); };
                                img.onerror = reject;
                                //ios safari 10.3 taints canvas with data urls unless crossOrigin is set to anonymous
                                var timeStamp = new Date().getTime();
                                var hasParamsRegex = /\?.+/;
                                if (isInlineBase64Image(src) || useCORS) {
                                    img.crossOrigin = 'anonymous';
                                    img.setAttribute('crossOrigin', 'anonymous');
                                    if (hasParamsRegex.test(src)) {
                                        src = src + '&v=' + timeStamp;
                                    }
                                    else {
                                        src = src + '?v=' + timeStamp;
                                    }
                                    img.src = src;
                                }
                                img.src = src;
                                if (img.complete === true) {
                                    // Inline XML images may fail to parse, throwing an Error later on
                                    setTimeout(function () { return resolve(img); }, 500);
                                }
                                if (_this._options.imageTimeout > 0) {
                                    setTimeout(function () { return reject("Timed out (" + _this._options.imageTimeout + "ms) loading image"); }, _this._options.imageTimeout);
                                }
                            })];
                    case 3: return [2 /*return*/, _a.sent()];
                }
            });
        });
    };
    Cache.prototype.has = function (key) {
        return typeof this._cache[key] !== 'undefined';
    };
    Cache.prototype.keys = function () {
        return Promise.resolve(Object.keys(this._cache));
    };
    Cache.prototype.proxy = function (src) {
        var _this = this;
        var proxy = this._options.proxy;
        if (!proxy) {
            throw new Error('No proxy defined');
        }
        var key = src.substring(0, 256);
        return new Promise(function (resolve, reject) {
            var responseType = features_1.FEATURES.SUPPORT_RESPONSE_TYPE ? 'blob' : 'text';
            var xhr = new XMLHttpRequest();
            xhr.onload = function () {
                if (xhr.status === 200) {
                    if (responseType === 'text') {
                        resolve(xhr.response);
                    }
                    else {
                        var reader_1 = new FileReader();
                        reader_1.addEventListener('load', function () { return resolve(reader_1.result); }, false);
                        reader_1.addEventListener('error', function (e) { return reject(e); }, false);
                        reader_1.readAsDataURL(xhr.response);
                    }
                }
                else {
                    reject("Failed to proxy resource " + key + " with status code " + xhr.status);
                }
            };
            xhr.onerror = reject;
            xhr.open('GET', proxy + "?url=" + encodeURIComponent(src) + "&responseType=" + responseType);
            if (responseType !== 'text' && xhr instanceof XMLHttpRequest) {
                xhr.responseType = responseType;
            }
            if (_this._options.imageTimeout) {
                var timeout_1 = _this._options.imageTimeout;
                xhr.timeout = timeout_1;
                xhr.ontimeout = function () { return reject("Timed out (" + timeout_1 + "ms) proxying " + key); };
            }
            xhr.send();
        });
    };
    return Cache;
}());
exports.Cache = Cache;
var INLINE_SVG = /^data:image\/svg\+xml/i;
var INLINE_BASE64 = /^data:image\/.*;base64,/i;
var INLINE_IMG = /^data:image\/.*/i;
var isRenderable = function (src) { return features_1.FEATURES.SUPPORT_SVG_DRAWING || !isSVG(src); };
var isInlineImage = function (src) { return INLINE_IMG.test(src); };
var isInlineBase64Image = function (src) { return INLINE_BASE64.test(src); };
var isBlobImage = function (src) { return src.substr(0, 4) === 'blob'; };
var isSVG = function (src) { return src.substr(-3).toLowerCase() === 'svg' || INLINE_SVG.test(src); };
//# sourceMappingURL=cache-storage.js.map