html2canvas
Version:
Screenshots with JavaScript
420 lines • 19.6 kB
JavaScript
"use strict";
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
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;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var assert_1 = require("assert");
var features_1 = require("../features");
var cache_storage_1 = require("../cache-storage");
var context_1 = require("../context");
var bounds_1 = require("../../css/layout/bounds");
var proxy = 'http://example.com/proxy';
var createMockContext = function (origin, opts) {
if (opts === void 0) { opts = {}; }
var context = {
location: {
href: origin
},
document: {
createElement: function (_name) {
var _href = '';
return {
set href(value) {
_href = value;
},
get href() {
return _href;
},
get protocol() {
return new URL(_href).protocol;
},
get hostname() {
return new URL(_href).hostname;
},
get port() {
return new URL(_href).port;
}
};
}
}
};
cache_storage_1.CacheStorage.setContext(context);
return new context_1.Context(__assign({ logging: false, imageTimeout: 0, useCORS: false, allowTaint: false, proxy: proxy }, opts), new bounds_1.Bounds(0, 0, 0, 0));
};
var images = [];
var xhr = [];
var sleep = function (timeout) { return __awaiter(void 0, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, new Promise(function (resolve) { return setTimeout(resolve, timeout); })];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); };
var ImageMock = /** @class */ (function () {
function ImageMock() {
images.push(this);
}
return ImageMock;
}());
var XMLHttpRequestMock = /** @class */ (function () {
function XMLHttpRequestMock() {
this.sent = false;
this.status = 500;
this.timeout = 5000;
xhr.push(this);
}
XMLHttpRequestMock.prototype.load = function (status, response) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
this.response = response;
this.status = status;
if (this.onload) {
this.onload();
}
return [4 /*yield*/, sleep(0)];
case 1:
_a.sent();
return [2 /*return*/];
}
});
});
};
XMLHttpRequestMock.prototype.open = function (method, url) {
this.method = method;
this.url = url;
};
XMLHttpRequestMock.prototype.send = function () {
this.sent = true;
};
return XMLHttpRequestMock;
}());
Object.defineProperty(global, 'Image', { value: ImageMock, writable: true });
Object.defineProperty(global, 'XMLHttpRequest', {
value: XMLHttpRequestMock,
writable: true
});
var setFeatures = function (opts) {
if (opts === void 0) { opts = {}; }
var defaults = {
SUPPORT_SVG_DRAWING: true,
SUPPORT_CORS_IMAGES: true,
SUPPORT_CORS_XHR: true,
SUPPORT_RESPONSE_TYPE: false
};
Object.keys(defaults).forEach(function (key) {
Object.defineProperty(features_1.FEATURES, key, {
value: typeof opts[key] === 'boolean' ? opts[key] : defaults[key],
writable: true
});
});
};
describe('cache-storage', function () {
beforeEach(function () { return setFeatures(); });
afterEach(function () {
xhr.splice(0, xhr.length);
images.splice(0, images.length);
});
it('addImage adds images to cache', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com', { proxy: null }).cache;
return [4 /*yield*/, cache.addImage('http://example.com/test.jpg')];
case 1:
_a.sent();
return [4 /*yield*/, cache.addImage('http://example.com/test2.jpg')];
case 2:
_a.sent();
assert_1.deepStrictEqual(images.length, 2);
assert_1.deepStrictEqual(images[0].src, 'http://example.com/test.jpg');
assert_1.deepStrictEqual(images[1].src, 'http://example.com/test2.jpg');
return [2 /*return*/];
}
});
}); });
it('addImage should not add duplicate entries', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com').cache;
return [4 /*yield*/, cache.addImage('http://example.com/test.jpg')];
case 1:
_a.sent();
return [4 /*yield*/, cache.addImage('http://example.com/test.jpg')];
case 2:
_a.sent();
assert_1.deepStrictEqual(images.length, 1);
assert_1.deepStrictEqual(images[0].src, 'http://example.com/test.jpg');
return [2 /*return*/];
}
});
}); });
describe('svg', function () {
it('should add svg images correctly', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com').cache;
return [4 /*yield*/, cache.addImage('http://example.com/test.svg')];
case 1:
_a.sent();
return [4 /*yield*/, cache.addImage('http://example.com/test2.svg')];
case 2:
_a.sent();
assert_1.deepStrictEqual(images.length, 2);
assert_1.deepStrictEqual(images[0].src, 'http://example.com/test.svg');
assert_1.deepStrictEqual(images[1].src, 'http://example.com/test2.svg');
return [2 /*return*/];
}
});
}); });
it('should omit svg images if not supported', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
setFeatures({ SUPPORT_SVG_DRAWING: false });
cache = createMockContext('http://example.com').cache;
return [4 /*yield*/, cache.addImage('http://example.com/test.svg')];
case 1:
_a.sent();
return [4 /*yield*/, cache.addImage('http://example.com/test2.svg')];
case 2:
_a.sent();
assert_1.deepStrictEqual(images.length, 0);
return [2 /*return*/];
}
});
}); });
});
describe('cross-origin', function () {
it('addImage should not add images it cannot load/render', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com', {
proxy: undefined
}).cache;
return [4 /*yield*/, cache.addImage('http://html2canvas.hertzen.com/test.jpg')];
case 1:
_a.sent();
assert_1.deepStrictEqual(images.length, 0);
return [2 /*return*/];
}
});
}); });
it('addImage should add images if tainting enabled', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com', {
allowTaint: true,
proxy: undefined
}).cache;
return [4 /*yield*/, cache.addImage('http://html2canvas.hertzen.com/test.jpg')];
case 1:
_a.sent();
assert_1.deepStrictEqual(images.length, 1);
assert_1.deepStrictEqual(images[0].src, 'http://html2canvas.hertzen.com/test.jpg');
assert_1.deepStrictEqual(images[0].crossOrigin, undefined);
return [2 /*return*/];
}
});
}); });
it('addImage should add images if cors enabled', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com', { useCORS: true }).cache;
return [4 /*yield*/, cache.addImage('http://html2canvas.hertzen.com/test.jpg')];
case 1:
_a.sent();
assert_1.deepStrictEqual(images.length, 1);
assert_1.deepStrictEqual(images[0].src, 'http://html2canvas.hertzen.com/test.jpg');
assert_1.deepStrictEqual(images[0].crossOrigin, 'anonymous');
return [2 /*return*/];
}
});
}); });
it('addImage should not add images if cors enabled but not supported', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
setFeatures({ SUPPORT_CORS_IMAGES: false });
cache = createMockContext('http://example.com', {
useCORS: true,
proxy: undefined
}).cache;
return [4 /*yield*/, cache.addImage('http://html2canvas.hertzen.com/test.jpg')];
case 1:
_a.sent();
assert_1.deepStrictEqual(images.length, 0);
return [2 /*return*/];
}
});
}); });
it('addImage should not add images to proxy if cors enabled', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com', { useCORS: true }).cache;
return [4 /*yield*/, cache.addImage('http://html2canvas.hertzen.com/test.jpg')];
case 1:
_a.sent();
assert_1.deepStrictEqual(images.length, 1);
assert_1.deepStrictEqual(images[0].src, 'http://html2canvas.hertzen.com/test.jpg');
assert_1.deepStrictEqual(images[0].crossOrigin, 'anonymous');
return [2 /*return*/];
}
});
}); });
it('addImage should use proxy ', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com').cache;
return [4 /*yield*/, cache.addImage('http://html2canvas.hertzen.com/test.jpg')];
case 1:
_a.sent();
assert_1.deepStrictEqual(xhr.length, 1);
assert_1.deepStrictEqual(xhr[0].url, proxy + "?url=" + encodeURIComponent('http://html2canvas.hertzen.com/test.jpg') + "&responseType=text");
return [4 /*yield*/, xhr[0].load(200, '<data response>')];
case 2:
_a.sent();
assert_1.deepStrictEqual(images.length, 1);
assert_1.deepStrictEqual(images[0].src, '<data response>');
return [2 /*return*/];
}
});
}); });
it('proxy should respect imageTimeout', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache, e_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com', {
imageTimeout: 10
}).cache;
return [4 /*yield*/, cache.addImage('http://html2canvas.hertzen.com/test.jpg')];
case 1:
_a.sent();
assert_1.deepStrictEqual(xhr.length, 1);
assert_1.deepStrictEqual(xhr[0].url, proxy + "?url=" + encodeURIComponent('http://html2canvas.hertzen.com/test.jpg') + "&responseType=text");
assert_1.deepStrictEqual(xhr[0].timeout, 10);
if (xhr[0].ontimeout) {
xhr[0].ontimeout();
}
_a.label = 2;
case 2:
_a.trys.push([2, 4, , 5]);
return [4 /*yield*/, cache.match('http://html2canvas.hertzen.com/test.jpg')];
case 3:
_a.sent();
assert_1.fail('Expected result to timeout');
return [3 /*break*/, 5];
case 4:
e_1 = _a.sent();
return [3 /*break*/, 5];
case 5: return [2 /*return*/];
}
});
}); });
});
it('match should return cache entry', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache, response;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com').cache;
return [4 /*yield*/, cache.addImage('http://example.com/test.jpg')];
case 1:
_a.sent();
if (images[0].onload) {
images[0].onload();
}
return [4 /*yield*/, cache.match('http://example.com/test.jpg')];
case 2:
response = _a.sent();
assert_1.deepStrictEqual(response.src, 'http://example.com/test.jpg');
return [2 /*return*/];
}
});
}); });
it('image should respect imageTimeout', function () { return __awaiter(void 0, void 0, void 0, function () {
var cache, e_2;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cache = createMockContext('http://example.com', { imageTimeout: 10 }).cache;
cache.addImage('http://example.com/test.jpg');
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 4]);
return [4 /*yield*/, cache.match('http://example.com/test.jpg')];
case 2:
_a.sent();
assert_1.fail('Expected result to timeout');
return [3 /*break*/, 4];
case 3:
e_2 = _a.sent();
return [3 /*break*/, 4];
case 4: return [2 /*return*/];
}
});
}); });
});
//# sourceMappingURL=cache-storage.js.map