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This commit is contained in:
Notealot 2021-11-29 14:03:13 +08:00
parent 48d71d8b8d
commit 839cc536f8
1 changed files with 20 additions and 18 deletions
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38
gin.go
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@ -422,11 +422,12 @@ func (engine *Engine) parseTrustedProxies() error {
// isTrustedProxy will check whether the IP address is included in the trusted list according to Engine.trustedCIDRs
func (engine *Engine) isTrustedProxy(ip net.IP) bool {
if engine.trustedCIDRs != nil {
for _, cidr := range engine.trustedCIDRs {
if cidr.Contains(ip) {
return true
}
if engine.trustedCIDRs == nil {
return false
}
for _, cidr := range engine.trustedCIDRs {
if cidr.Contains(ip) {
return true
}
}
return false
@ -434,20 +435,21 @@ func (engine *Engine) isTrustedProxy(ip net.IP) bool {
// validateHeader will parse X-Forwarded-For header and return the trusted client IP address
func (engine *Engine) validateHeader(header string) (clientIP string, valid bool) {
if header != "" {
items := strings.Split(header, ",")
for i := len(items) - 1; i >= 0; i-- {
ipStr := strings.TrimSpace(items[i])
ip := net.ParseIP(ipStr)
if ip == nil {
break
}
if header == "" {
return "", false
}
items := strings.Split(header, ",")
for i := len(items) - 1; i >= 0; i-- {
ipStr := strings.TrimSpace(items[i])
ip := net.ParseIP(ipStr)
if ip == nil {
break
}
// X-Forwarded-For is appended by proxy
// Check IPs in reverse order and stop when find untrusted proxy
if (i == 0) || (!engine.isTrustedProxy(ip)) {
return ipStr, true
}
// X-Forwarded-For is appended by proxy
// Check IPs in reverse order and stop when find untrusted proxy
if (i == 0) || (!engine.isTrustedProxy(ip)) {
return ipStr, true
}
}
return "", false