puppeteer render local HTML template bug
➜ url-to-poster git:(master) ✗ dev
^-v-^ app is running in development env!
yarn run v1.16.0
$ node index.js
(node:2725) UnhandledPromiseRejectionWarning: Error: Protocol error (Page.navigate): Cannot navigate to invalid URL
at Promise (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/Connection.js:183:56)
at new Promise (<anonymous>)
at CDPSession.send (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/Connection.js:182:12)
at navigate (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/FrameManager.js:118:39)
at FrameManager.navigateFrame (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/FrameManager.js:95:7)
at Frame.goto (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/FrameManager.js:406:37)
at Frame.<anonymous> (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/helper.js:112:23)
at Page.goto (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/Page.js:672:49)
at Page.<anonymous> (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/helper.js:112:23)
at /Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/index.js:30:14
-- ASYNC --
at Frame.<anonymous> (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/helper.js:111:15)
at Page.goto (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/Page.js:672:49)
at Page.<anonymous> (/Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/node_modules/puppeteer/lib/helper.js:112:23)
at /Users/xgqfrms-mbp/Documents/GitHub/url-to-poster/index.js:30:14
at process._tickCallback (internal/process/next_tick.js:68:7)
(node:2725) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:2725) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
solution
const Fs = require('fs')
const Path = require('path')
const Util = require('util')
const Puppeteer = require('puppeteer')
const Handlebars = require('handlebars')
const ReadFile = Util.promisify(Fs.readFile)
class Invoice {
async html() {
try {
const data = {
your: 'data'
}
const templatePath = Path.resolve('path', 'to', 'invoice.html')
const content = await ReadFile(templatePath, 'utf8')
// compile and render the template with handlebars
const template = Handlebars.compile(content)
return template(data)
} catch (error) {
throw new Error('Cannot create invoice HTML template.')
}
}
async pdf() {
const html = await this.html()
const browser = await Puppeteer.launch()
const page = await browser.newPage()
await page.setContent(html)
return page.pdf()
}
}
https://github.com/wildbit/postmark-templates/tree/master/templates/basic/invoice
handlebars.js
HTML template
https://github.com/wycats/handlebars.js
https://handlebarsjs.com/zh/guide/
var source = "<p>Hello, my name is {{name}}. I am from {{hometown}}. I have " +
"{{kids.length}} kids:</p>" +
"<ul>{{#kids}}<li>{{name}} is {{age}}</li>{{/kids}}</ul>";
var template = Handlebars.compile(source);
var data = { "name": "Alan", "hometown": "Somewhere, TX",
"kids": [{"name": "Jimmy", "age": "12"}, {"name": "Sally", "age": "4"}]};
var result = template(data);
// Would render:
// <p>Hello, my name is Alan. I am from Somewhere, TX. I have 2 kids:</p>
// <ul>
// <li>Jimmy is 12</li>
// <li>Sally is 4</li>
// </ul>