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feature, net/tshttpproxy: pull out support for using proxies as a feature

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Saves 139 KB.

Also Synology support, which I saw had its own large-ish proxy parsing
support on Linux, but support for proxies without Synology proxy
support is reasonable, so I pulled that out as its own thing.

Updates #12614

Change-Id: I22de285a3def7be77fdcf23e2bec7c83c9655593
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2025-09-30 09:12:42 -07:00
committed by Brad Fitzpatrick
parent 9b997c8f2f
commit 442a3a779d
45 changed files with 267 additions and 79 deletions
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19
cmd/tailscaled/debug.go
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@@ -21,10 +21,11 @@ import (
"time"
"tailscale.com/derp/derphttp"
"tailscale.com/feature"
"tailscale.com/feature/buildfeatures"
"tailscale.com/health"
"tailscale.com/ipn"
"tailscale.com/net/netmon"
"tailscale.com/net/tshttpproxy"
"tailscale.com/tailcfg"
"tailscale.com/types/key"
"tailscale.com/util/eventbus"
@@ -124,9 +125,14 @@ func getURL(ctx context.Context, urlStr string) error {
if err != nil {
return fmt.Errorf("http.NewRequestWithContext: %v", err)
}
proxyURL, err := tshttpproxy.ProxyFromEnvironment(req)
if err != nil {
return fmt.Errorf("tshttpproxy.ProxyFromEnvironment: %v", err)
var proxyURL *url.URL
if buildfeatures.HasUseProxy {
if proxyFromEnv, ok := feature.HookProxyFromEnvironment.GetOk(); ok {
proxyURL, err = proxyFromEnv(req)
if err != nil {
return fmt.Errorf("tshttpproxy.ProxyFromEnvironment: %v", err)
}
}
}
log.Printf("proxy: %v", proxyURL)
tr := &http.Transport{
@@ -135,7 +141,10 @@ func getURL(ctx context.Context, urlStr string) error {
DisableKeepAlives: true,
}
if proxyURL != nil {
auth, err := tshttpproxy.GetAuthHeader(proxyURL)
var auth string
if f, ok := feature.HookProxyGetAuthHeader.GetOk(); ok {
auth, err = f(proxyURL)
}
if err == nil && auth != "" {
tr.ProxyConnectHeader.Set("Proxy-Authorization", auth)
}