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srealip_test.go
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package srealip
import (
"fmt"
"net"
"net/http"
"testing"
"github.com/stretchr/testify/assert"
)
func newHttpRequest(remoteAddr string, xRealIP string, xForwardedFor ...string) *http.Request {
h := http.Header{
"X-Forwarded-For": xForwardedFor,
}
h.Set("X-Real-IP", xRealIP)
return &http.Request{
RemoteAddr: remoteAddr,
Header: h,
}
}
func TestIsPrivate(t *testing.T) {
publicAddr1 := "144.12.54.87"
assert.False(t, isPrivateIP(net.ParseIP(publicAddr1)))
publicAddr2 := "119.14.55.11"
assert.False(t, isPrivateIP(net.ParseIP(publicAddr2)))
publicAddr3 := "119.15.55.11"
assert.False(t, isPrivateIP(net.ParseIP(publicAddr3)))
localAddr := "127.0.0.0"
assert.True(t, isPrivateIP(net.ParseIP(localAddr)))
privateAddr := "192.168.1.1"
assert.True(t, isPrivateIP(net.ParseIP(privateAddr)))
sharedAddr := "100.127.28.62"
assert.True(t, isPrivateIP(net.ParseIP(sharedAddr)))
invalidAddr := "string"
assert.False(t, isPrivateIP(net.ParseIP(invalidAddr)))
emptyAddr := ""
assert.False(t, isPrivateIP(net.ParseIP(emptyAddr)))
}
func TestSecureRealIp(t *testing.T) {
publicAddr1 := "144.12.54.87"
publicAddr2 := "119.14.55.11"
publicAddr3 := "119.15.55.11"
localAddr := "127.0.0.0"
privateAddr := "192.168.1.1"
sharedAddr := "100.127.28.62"
publicAddr1WithPort := fmt.Sprintf("%s:%d", publicAddr1, 80)
invalidAddr := "invalidStr"
tests := map[string]struct {
request *http.Request
expected string
}{
"No X-Forwarded-For": {request: newHttpRequest(publicAddr1, ""), expected: publicAddr1},
"X-Forwarded-For - one value": {request: newHttpRequest(publicAddr1, "", publicAddr2), expected: publicAddr2},
"multiple X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", localAddr, publicAddr1, publicAddr2), expected: publicAddr2},
"Has local X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", publicAddr1, localAddr), expected: publicAddr1},
"Has private X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", publicAddr1, localAddr, privateAddr), expected: publicAddr1},
"Has shared X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", publicAddr1, sharedAddr, localAddr, privateAddr), expected: publicAddr1},
"Has X-Real-IP": {request: newHttpRequest(publicAddr3, publicAddr2, publicAddr1, localAddr), expected: publicAddr1},
"not IP X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", invalidAddr), expected: publicAddr3},
"not + vallid IP X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", publicAddr2, privateAddr, invalidAddr), expected: publicAddr2},
"not IP X-Forwarded-For then IP": {request: newHttpRequest(publicAddr3, "", publicAddr1, localAddr, invalidAddr), expected: publicAddr1},
"RemoteAddr with port": {request: newHttpRequest(publicAddr1WithPort, "", localAddr, invalidAddr), expected: publicAddr1},
"invalid at all header": {request: newHttpRequest(invalidAddr, invalidAddr, invalidAddr), expected: invalidAddr},
"empty IP at all header": {request: newHttpRequest("", ""), expected: ""},
}
for name, tc := range tests {
t.Run(name, func(t *testing.T) {
if actual := SecureRealIP(tc.request); tc.expected != actual {
t.Errorf("expected %s but got %s", tc.expected, actual)
}
})
}
}
func TestNaiveRealIp(t *testing.T) {
publicAddr1 := "144.12.54.87"
publicAddr2 := "119.14.55.11"
publicAddr3 := "119.15.55.11"
publicAddr4 := "119.16.55.11"
localAddr := "127.0.0.0"
privateAddr := "192.168.1.1"
sharedAddr := "100.127.28.62"
invalidAddr := "invalidStr"
publicAddr1WithPort := fmt.Sprintf("%s:%d", publicAddr1, 80)
tests := map[string]struct {
request *http.Request
expected string
}{
"No X-Forwarded-For": {request: newHttpRequest(publicAddr1, ""), expected: publicAddr1},
"X-Forwarded-For - one value": {request: newHttpRequest(publicAddr1, "", publicAddr2), expected: publicAddr2},
"multiple X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", localAddr, publicAddr1, publicAddr2), expected: publicAddr1},
"Has private X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", privateAddr, publicAddr1, localAddr), expected: publicAddr1},
"Has shared X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", sharedAddr, publicAddr1, localAddr), expected: publicAddr1},
"not IP X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", invalidAddr), expected: publicAddr3},
"not + vallid IP X-Forwarded-For": {request: newHttpRequest(publicAddr3, "", privateAddr, publicAddr2, invalidAddr), expected: publicAddr2},
"not IP X-Forwarded-For then IP": {request: newHttpRequest(publicAddr3, "", localAddr, invalidAddr, publicAddr1), expected: publicAddr1},
"Has X-Real-IP": {request: newHttpRequest(publicAddr3, publicAddr2, publicAddr1, localAddr), expected: publicAddr2},
"Private X-Real-IP": {request: newHttpRequest(publicAddr3, privateAddr, localAddr, publicAddr1), expected: publicAddr1},
"Private Headers": {request: newHttpRequest(publicAddr3, privateAddr, localAddr, privateAddr), expected: publicAddr3},
"Invalid X-Real-IP": {request: newHttpRequest(publicAddr3, invalidAddr, publicAddr1), expected: publicAddr1},
"Invalid Headers": {request: newHttpRequest(publicAddr3, invalidAddr, invalidAddr), expected: publicAddr3},
"RemoteAddr with port": {request: newHttpRequest(publicAddr1WithPort, "", localAddr, invalidAddr), expected: publicAddr1},
"empty IP at all header": {request: newHttpRequest("", ""), expected: ""},
"invalid at all header": {request: newHttpRequest(invalidAddr, invalidAddr, invalidAddr), expected: invalidAddr},
}
for name, tc := range tests {
t.Run(name, func(t *testing.T) {
if actual := NaiveRealIP(tc.request); tc.expected != actual {
t.Errorf("expected %s but got %s", tc.expected, actual)
}
})
}
// Test multiple "X-Real-IP"
req := newHttpRequest(publicAddr3, publicAddr2, publicAddr1)
req.Header.Add("X-Real-IP", publicAddr4)
assert.Equal(t, publicAddr2, NaiveRealIP(req))
// Test multiple "X-Real-IP", with invalid value as second
// NaiveRealIP should only look on the first value
req = newHttpRequest(publicAddr3, publicAddr2, publicAddr1)
req.Header.Add("X-Real-IP", invalidAddr)
assert.Equal(t, publicAddr2, NaiveRealIP(req))
// Test multiple "X-Real-IP", with invalid value as first
req = newHttpRequest(publicAddr3, invalidAddr, publicAddr1)
req.Header.Add("X-Real-IP", publicAddr2)
assert.Equal(t, publicAddr1, NaiveRealIP(req))
}