html2canvas/dist/npm/Proxy.js

Screenshots with JavaScript

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.Proxy = undefined;

var _Feature = require('./Feature');

var _Feature2 = _interopRequireDefault(_Feature);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var Proxy = exports.Proxy = function Proxy(src, options) {
    if (!options.proxy) {
        return Promise.reject(process.env.NODE_ENV !== 'production' ? 'No proxy defined' : null);
    }
    var proxy = options.proxy;

    return new Promise(function (resolve, reject) {
        var responseType = _Feature2.default.SUPPORT_CORS_XHR && _Feature2.default.SUPPORT_RESPONSE_TYPE ? 'blob' : 'text';
        var xhr = _Feature2.default.SUPPORT_CORS_XHR ? new XMLHttpRequest() : new XDomainRequest();
        xhr.onload = function () {
            if (xhr instanceof XMLHttpRequest) {
                if (xhr.status === 200) {
                    if (responseType === 'text') {
                        resolve(xhr.response);
                    } else {
                        var reader = new FileReader();
                        // $FlowFixMe
                        reader.addEventListener('load', function () {
                            return resolve(reader.result);
                        }, false);
                        // $FlowFixMe
                        reader.addEventListener('error', function (e) {
                            return reject(e);
                        }, false);
                        reader.readAsDataURL(xhr.response);
                    }
                } else {
                    reject(process.env.NODE_ENV !== 'production' ? 'Failed to proxy resource ' + src.substring(0, 256) + ' with status code ' + xhr.status : '');
                }
            } else {
                resolve(xhr.responseText);
            }
        };

        xhr.onerror = reject;
        xhr.open('GET', proxy + '?url=' + encodeURIComponent(src) + '&responseType=' + responseType);

        if (responseType !== 'text' && xhr instanceof XMLHttpRequest) {
            xhr.responseType = responseType;
        }

        if (options.imageTimeout) {
            var timeout = options.imageTimeout;
            xhr.timeout = timeout;
            xhr.ontimeout = function () {
                return reject(process.env.NODE_ENV !== 'production' ? 'Timed out (' + timeout + 'ms) proxying ' + src.substring(0, 256) : '');
            };
        }

        xhr.send();
    });
};