Guidance for suppressing 301 redirect from target?
Problem
Hello. I'm not sure if this is a bug or intended feature, but when the target issues a 301 redirect, the proxy forwards that to the client and the client gets redirected away from the proxy. Is there a way to resolve this? Thanks!
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1 Fix
Implement Proxy Redirect Handling for 301 Responses
When a target server issues a 301 redirect, the proxy forwards this response to the client without modification. This behavior causes the client to follow the redirect to the new location, bypassing the proxy. This is standard HTTP behavior, but it can be problematic in scenarios where the proxy needs to maintain control over the request flow.
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- 1
Capture 301 Redirects
Modify the proxy server's request handling to intercept 301 redirect responses from the target server.
javascriptif (response.statusCode === 301) { /* Handle redirect */ } - 2
Modify Redirect Location
Instead of forwarding the 301 response directly, modify the 'Location' header to point back to the proxy with the new target URL as a query parameter.
javascriptresponse.headers['Location'] = 'http://proxy-server.com/redirect?target=' + encodeURIComponent(response.headers['Location']); - 3
Send Custom Redirect Response
Send a new response to the client with a 302 status code and the modified 'Location' header to ensure the client follows the redirect through the proxy.
javascriptres.writeHead(302, { Location: response.headers['Location'] }); res.end(); - 4
Test the Implementation
After implementing the changes, test the proxy with a known URL that issues a 301 redirect to ensure that the client is redirected through the proxy as intended.
bash// Use a tool like Postman or curl to test the redirect
Validation
Use a tool like Postman or curl to send a request to the proxy that triggers a 301 redirect. Verify that the response contains a 302 status code and the 'Location' header points back to the proxy with the correct target URL as a query parameter.
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Environment
Submitted by
Alex Chen
2450 rep