html2canvas/tests/server.ts

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import * as express from 'express';
const cors = require('cors');
const path = require('path');
const serveIndex = require('serve-index');
const proxy = require('html2canvas-proxy');
import yargs from 'yargs';
import {ScreenshotRequest} from './types';
const fs = require('fs');
const bodyParser = require('body-parser');
const filenamifyUrl = require('filenamify-url');
const mkdirp = require('mkdirp');
export const app = express();
app.use('/', serveIndex(path.resolve(__dirname, '../'), {icons: true}));
app.use('/', express.static(path.resolve(__dirname, '../')));
export const corsApp = express();
corsApp.use('/proxy', proxy());
corsApp.use('/cors', cors(), express.static(path.resolve(__dirname, '../')));
corsApp.use('/', express.static(path.resolve(__dirname, '.')));
export const screenshotApp = express();
screenshotApp.use(cors());
screenshotApp.use((req: express.Request, _res: express.Response, next: express.NextFunction) => {
// IE9 doesn't set headers for cross-domain ajax requests
if (typeof req.headers['content-type'] === 'undefined') {
req.headers['content-type'] = 'application/json';
}
next();
});
screenshotApp.use(
bodyParser.json({
limit: '15mb',
type: '*/*'
})
);
const prefix = 'data:image/png;base64,';
const screenshotFolder = '../tmp/reftests';
const metadataFolder = '../tmp/reftests/metadata';
mkdirp.sync(path.resolve(__dirname, screenshotFolder));
mkdirp.sync(path.resolve(__dirname, metadataFolder));
const writeScreenshot = (buffer: Buffer, body: ScreenshotRequest) => {
const filename = `${filenamifyUrl(body.test.replace(/^\/tests\/reftests\//, '').replace(/\.html$/, ''), {
replacement: '-'
})}!${[process.env.TARGET_BROWSER, body.platform.name, body.platform.version].join('-')}`;
fs.writeFileSync(path.resolve(__dirname, screenshotFolder, `${filename}.png`), buffer);
return filename;
};
screenshotApp.post('/screenshot', (req: express.Request<{}, void, ScreenshotRequest>, res: express.Response) => {
if (!req.body || !req.body.screenshot) {
return res.sendStatus(400);
}
const buffer = Buffer.from(req.body.screenshot.substring(prefix.length), 'base64');
const filename = writeScreenshot(buffer, req.body);
fs.writeFileSync(
path.resolve(__dirname, metadataFolder, `${filename}.json`),
JSON.stringify({
windowWidth: req.body.windowWidth,
windowHeight: req.body.windowHeight,
platform: req.body.platform,
devicePixelRatio: req.body.devicePixelRatio,
test: req.body.test,
id: process.env.TARGET_BROWSER,
screenshot: filename
})
);
return res.sendStatus(200);
});
screenshotApp.use((error: Error, _req: express.Request, _res: express.Response, next: express.NextFunction) => {
console.error(error);
next();
});
const args = yargs(process.argv.slice(2)).number(['port', 'cors']).argv;
if (args.port) {
app.listen(args.port, () => {
console.log(`Server running on port ${args.port}`);
});
}
if (args.cors) {
corsApp.listen(args.cors, () => {
console.log(`CORS server running on port ${args.cors}`);
});
}