convert-html-to-pdf
Version:
Convert HTML to PDF in node.js
146 lines (145 loc) • 7.05 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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) : new P(function (resolve) { resolve(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 };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var isArray_1 = __importDefault(require("lodash/fp/isArray"));
var mergeWith_1 = __importDefault(require("lodash/fp/mergeWith"));
var puppeteer_1 = __importDefault(require("puppeteer"));
var HTMLToPDF = /** @class */ (function () {
function HTMLToPDF(html, options) {
this._options = {
browserOptions: {
args: ['--font-render-hinting=none'],
},
pdfOptions: {
printBackground: true,
},
waitForNetworkIdle: false,
};
this.mergeOptions = mergeWith_1.default(function (objValue, srcValue) {
if (isArray_1.default(objValue)) {
if (srcValue.length === 0) {
return objValue = srcValue;
}
return objValue.concat(srcValue);
}
});
if (options) {
this._options = this.mergeOptions(this._options, options);
}
this._html = html;
}
Object.defineProperty(HTMLToPDF.prototype, "html", {
set: function (html) {
this._html = html;
},
enumerable: true,
configurable: true
});
Object.defineProperty(HTMLToPDF.prototype, "options", {
set: function (options) {
this._options = this.mergeOptions(this._options, options);
},
enumerable: true,
configurable: true
});
HTMLToPDF.prototype.convert = function () {
var _this = this;
return new Promise(function (res, rej) { return __awaiter(_this, void 0, void 0, function () {
var browser, page, html, pdf, err_1;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, puppeteer_1.default.launch(this._options.browserOptions)];
case 1:
browser = _a.sent();
return [4 /*yield*/, browser.newPage()];
case 2:
page = _a.sent();
page.on('error', function (err) { return __awaiter(_this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, browser.close()];
case 1:
_a.sent();
rej(err);
return [2 /*return*/];
}
});
}); });
if (!this._options.waitForNetworkIdle) return [3 /*break*/, 4];
html = HTMLToPDF.createDataUri(this._html, 'text/html');
return [4 /*yield*/, page.goto(html, { waitUntil: 'networkidle0' })];
case 3:
_a.sent();
return [3 /*break*/, 6];
case 4: return [4 /*yield*/, page.setContent(this._html)];
case 5:
_a.sent();
_a.label = 6;
case 6:
_a.trys.push([6, 9, , 11]);
return [4 /*yield*/, page.pdf(this._options.pdfOptions)];
case 7:
pdf = _a.sent();
return [4 /*yield*/, browser.close()];
case 8:
_a.sent();
res(pdf);
return [3 /*break*/, 11];
case 9:
err_1 = _a.sent();
return [4 /*yield*/, browser.close()];
case 10:
_a.sent();
rej(new Error("Error whilst generating PDF: " + err_1.message));
return [3 /*break*/, 11];
case 11: return [2 /*return*/];
}
});
}); });
};
HTMLToPDF.createDataUri = function (data, mimeType) {
var asBuffer = data instanceof Buffer ? data : Buffer.from(data);
var asBase64 = asBuffer.toString('base64');
return "data:" + mimeType + ";base64," + asBase64;
};
return HTMLToPDF;
}());
exports.default = HTMLToPDF;