How to solve the 404 error that occurs after 302 redirect when using Selenium to simulate login?

Selenium simulation login: 404 error troubleshooting and resolution after 302 redirect

When using Selenium for automated login, sometimes you will encounter a login request that returns a 302 redirect, but the final page shows a 404 error. When logging in manually, the process is normal: login?service=http://best.youyuan.com/cas returns 302, redirect to https://best.youyuan.com/cas?ticket=ST-376416-ECsUQJ3kbHWZbDT... and the page is successfully loaded. However, after Selenium automatically logs in, although it also returns 302 and redirects, the target page returns 404 error.

Analysis shows that the 404 error is returned by the nginx server. When logging in manually, the browser URL remains unchanged after redirection, which may be the result of nginx rewrite operation on /cas?ticket=xxx request. The Selenium operation causes the URL to change, which is equivalent to re-initiating a GET request to /cas?ticket=xxx . The nginx configuration may cause these two requests to match different locations, resulting in a 404 error.

Here are a few solutions:

1. Check Nginx configuration: Carefully check nginx configuration files, especially /cas?ticket=xxx related rewrite rules to ensure that these rules take effect correctly under manual and automated operations, and avoid inconsistent request matching due to configuration differences.

2. Simulate browser redirection behavior: In Selenium script, you can try to directly get the URL of the current page after 302 redirect and manually set it to the correct URL to avoid triggering new GET requests. This can simulate the browser's behavior after redirection and keep the URL unchanged.

3. Make sure cookies are handled correctly: While cookies are lost are a possible reason, it is more important to ensure cookies are handled correctly in Selenium scripts. Use Selenium's add_cookie method to add necessary cookies, or ensure that browser sessions remain consistent throughout the login process, avoiding cookies loss or mismatch.

Through the above methods, the 404 error after 302 redirection occurs during the Selenium simulation login process can be effectively solved, ensuring that the automated script completes the login operation smoothly.

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