I’m having trouble scraping a website that recently updated its authentication. The site now uses OpenID bearer tokens for some parts.
My OkHttp3 setup worked before, but now I’m getting 401 errors. I’ve confirmed it’s because of the missing bearer token. When I manually add the token from my browser, it works fine.
I tried using HtmlUnit as a headless browser to get closer to a real browser environment. It can scrape some parts of the site, but still fails on the sections that require the bearer token. I can’t find the token in the responses or cookies.
Is it possible to retrieve the OpenID bearer token using a headless browser? Or should I consider other methods? I’m using Java for this project.
I’ve dealt with similar issues before, and it can be tricky. One approach that worked for me was using Puppeteer with Node.js. It’s a powerful tool for automating headless Chrome or Chromium browsers and has good support for handling modern authentication flows.
With Puppeteer, you can intercept network requests and responses, which makes it easier to capture the bearer token. You might need to set up a custom middleware to extract the token from the appropriate request or response headers.
If you’re set on using Java, you could look into using Selenium with ChromeDriver in headless mode. It’s a bit more complex to set up, but it gives you more control over the browser environment.
Remember to respect the website’s terms of service and rate limits when scraping. Sometimes reaching out to the site owners about API access can save you a lot of headaches in the long run.
have u tried using selenium with a headless chrome browser? it might be more reliable for handling modern auth. you could also try intercepting network requests to see where the token is being set. if all else fails, maybe look into using an API if the site offers one. good luck!
I’ve encountered similar challenges with OpenID bearer tokens. One effective approach is using Playwright, a newer automation library that supports multiple browser engines. It’s particularly good at handling modern authentication mechanisms.
Playwright allows you to intercept network requests and extract the bearer token. You can set up a request interception to capture the token when it’s first issued, then use it for subsequent requests.
If you’re committed to Java, consider JBrowserDriver. It’s a pure Java headless browser that implements the Selenium WebDriver API. It might handle the OpenID flow better than HtmlUnit.
Remember, some sites implement anti-scraping measures that detect headless browsers. You might need to tweak your user agent or other browser fingerprints to bypass these. Always ensure you’re complying with the site’s terms of service when scraping.