Validate Chrome is working at startup

src/index.ts

@@ -1,8 +1,13 @@
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
 import log from './log'
 import { createServer, IncomingMessage, ServerResponse } from 'http';
 import { RequestContext } from './types'
 import Router, { BaseAPICall } from './routes'
 import getCaptchaSolver from "./captcha";
+import sessions from "./session";
+import {v1 as UUIDv1} from "uuid";
 
 const version: string = "v" + require('../package.json').version
 const serverPort: number = Number(process.env.PORT) || 8191
@@ -30,6 +35,22 @@ function validateEnvironmentVariables() {
   }
 }
 
+async function testChromeInstallation() {
+  log.debug("Testing Chrome installation...")
+  // create a temporary file for testing
+  const filePath = path.join(os.tmpdir(), 'flaresolverr.txt')
+  fs.writeFileSync(filePath, 'flaresolverr');
+  // launch the browser
+  const url = `file://${filePath}`;
+  const session = await sessions.create(UUIDv1(), {
+    userAgent: null,
+    oneTimeSession: true
+  })
+  const page = await session.browser.newPage()
+  await page.goto(url, { waitUntil: 'domcontentloaded' })
+  log.debug("Test successful.")
+}
+
 function errorResponse(errorMsg: string, res: ServerResponse, startTimestamp: number) {
   log.error(errorMsg)
   const response = {
@@ -87,8 +108,10 @@ function validateIncomingRequest(ctx: RequestContext, params: BaseAPICall) {
 }
 
 // init
+log.info(`FlareSolverr ${version}`);
+log.debug('Debug log enabled');
 validateEnvironmentVariables();
-
+testChromeInstallation().then(r =>
   createServer((req: IncomingMessage, res: ServerResponse) => {
     const startTimestamp = Date.now()
 
@@ -145,6 +168,6 @@ createServer((req: IncomingMessage, res: ServerResponse) => {
       })
     })
   }).listen(serverPort, serverHost, () => {
-  log.info(`FlareSolverr ${version} listening on http://${serverHost}:${serverPort}`);
+    log.info(`Listening on http://${serverHost}:${serverPort}`);
-  log.debug('Debug log enabled');
   })
+)