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ipn: add support for HTTP Redirects (#17594)

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Adds a new Redirect field to HTTPHandler for serving HTTP redirects
from the Tailscale serve config. The redirect URL supports template
variables ${HOST} and ${REQUEST_URI} that are resolved per request.

By default, it redirects using HTTP Status 302 (Found). For another
redirect status, like 301 - Moved Permanently, pass the HTTP status
code followed by ':' on Redirect, like: "301:https://tailscale.com"

Updates #11252
Updates #11330

Signed-off-by: Fernando Serboncini <fserb@tailscale.com>
This commit is contained in:
Fernando Serboncini
2025-10-29 21:27:59 -04:00
committed by GitHub
parent 05d2dcaf49
commit d68513b0db
5 changed files with 168 additions and 1 deletions
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ipn/serve.go
+10 -1
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@@ -162,8 +162,17 @@ type HTTPHandler struct {
AcceptAppCaps []tailcfg.PeerCapability `json:",omitempty"` // peer capabilities to forward in grant header, e.g. example.com/cap/mon
// Redirect, if not empty, is the target URL to redirect requests to.
// By default, we redirect with HTTP 302 (Found) status.
// If Redirect starts with '<httpcode>:', then we use that status instead.
//
// The target URL supports the following expansion variables:
// - ${HOST}: replaced with the request's Host header value
// - ${REQUEST_URI}: replaced with the request's full URI (path and query string)
Redirect string `json:",omitempty"`
// TODO(bradfitz): bool to not enumerate directories? TTL on mapping for
// temporary ones? Error codes? Redirects?
// temporary ones? Error codes?
}
// WebHandlerExists reports whether if the ServeConfig Web handler exists for