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package internal
import (
"errors"
"net/http"
"net/http/httptest"
"testing"
)
func TestXForwardedForUpdateIgnoreUnix(t *testing.T) {
var remoteAddr = ""
var xff = ""
h := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
remoteAddr = r.RemoteAddr
xff = r.Header.Get("X-Forwarded-For")
w.WriteHeader(http.StatusOK)
})
r := httptest.NewRequest(http.MethodGet, "/", nil)
r.RemoteAddr = "@"
w := httptest.NewRecorder()
XForwardedForUpdate(h).ServeHTTP(w, r)
if r.RemoteAddr != remoteAddr {
t.Errorf("wanted remoteAddr to be %s, got: %s", r.RemoteAddr, remoteAddr)
}
if xff != "" {
t.Error("handler added X-Forwarded-For when it should not have")
}
}
func TestXForwardedForUpdateAddToChain(t *testing.T) {
var xff = ""
const expected = "1.1.1.1"
h := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
xff = r.Header.Get("X-Forwarded-For")
w.WriteHeader(http.StatusOK)
})
srv := httptest.NewServer(XForwardedForUpdate(h))
r, err := http.NewRequest(http.MethodGet, srv.URL, nil)
if err != nil {
t.Fatal(err)
}
r.Header.Set("X-Forwarded-For", "1.1.1.1,10.20.30.40")
if _, err := srv.Client().Do(r); err != nil {
t.Fatal(err)
}
if xff != expected {
t.Logf("expected: %s", expected)
t.Logf("got: %s", xff)
t.Error("X-Forwarded-For header was not what was expected")
}
}
func TestComputeXFFHeader(t *testing.T) {
for _, tt := range []struct {
name string
remoteAddr string
origXFFHeader string
pref XFFComputePreferences
result string
err error
}{
{
name: "StripPrivate",
remoteAddr: "127.0.0.1:80",
origXFFHeader: "1.1.1.1,10.0.0.1",
pref: XFFComputePreferences{
StripPrivate: true,
},
result: "1.1.1.1,127.0.0.1",
},
{
name: "StripLoopback",
remoteAddr: "127.0.0.1:80",
origXFFHeader: "1.1.1.1,10.0.0.1,127.0.0.1",
pref: XFFComputePreferences{
StripLoopback: true,
},
result: "1.1.1.1,10.0.0.1",
},
{
name: "StripCGNAT",
remoteAddr: "100.64.0.1:80",
origXFFHeader: "1.1.1.1,10.0.0.1,100.64.0.1",
pref: XFFComputePreferences{
StripCGNAT: true,
},
result: "1.1.1.1,10.0.0.1",
},
{
name: "StripLinkLocalUnicastIPv4",
remoteAddr: "169.254.0.1:80",
origXFFHeader: "1.1.1.1,10.0.0.1,169.254.0.1",
pref: XFFComputePreferences{
StripLLU: true,
},
result: "1.1.1.1,10.0.0.1",
},
{
name: "StripLinkLocalUnicastIPv6",
remoteAddr: "169.254.0.1:80",
origXFFHeader: "1.1.1.1,10.0.0.1,fe80::",
pref: XFFComputePreferences{
StripLLU: true,
},
result: "1.1.1.1,10.0.0.1",
},
{
name: "Flatten",
remoteAddr: "127.0.0.1:80",
origXFFHeader: "1.1.1.1,10.0.0.1,fe80::,100.64.0.1,169.254.0.1",
pref: XFFComputePreferences{
StripPrivate: true,
StripLoopback: true,
StripCGNAT: true,
StripLLU: true,
Flatten: true,
},
result: "1.1.1.1",
},
{
name: "invalid-ip-port",
remoteAddr: "fe80::",
err: ErrCantSplitHostParse,
},
{
name: "invalid-remote-ip",
remoteAddr: "anubis:80",
err: ErrCantParseRemoteIP,
},
{
name: "no-xff-dont-panic",
remoteAddr: "127.0.0.1:80",
pref: XFFComputePreferences{
StripPrivate: true,
StripLoopback: true,
StripCGNAT: true,
StripLLU: true,
Flatten: true,
},
},
} {
t.Run(tt.name, func(t *testing.T) {
result, err := computeXFFHeader(tt.remoteAddr, tt.origXFFHeader, tt.pref)
if err != nil && !errors.Is(err, tt.err) {
t.Errorf("computeXFFHeader got the wrong error, wanted %v but got: %v", tt.err, err)
}
if result != tt.result {
t.Errorf("computeXFFHeader returned the wrong result, wanted %q but got: %q", tt.result, result)
}
})
}
}
|
