You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
90 lines
2.0 KiB
90 lines
2.0 KiB
package http
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
// ValidateEndpointHost validates that the host string passed in is a valid RFC
|
|
// 3986 host. Returns error if the host is not valid.
|
|
func ValidateEndpointHost(host string) error {
|
|
var errors strings.Builder
|
|
var hostname string
|
|
var port string
|
|
var err error
|
|
|
|
if strings.Contains(host, ":") {
|
|
hostname, port, err = net.SplitHostPort(host)
|
|
if err != nil {
|
|
errors.WriteString(fmt.Sprintf("\n endpoint %v, failed to parse, got ", host))
|
|
errors.WriteString(err.Error())
|
|
}
|
|
|
|
if !ValidPortNumber(port) {
|
|
errors.WriteString(fmt.Sprintf("port number should be in range [0-65535], got %v", port))
|
|
}
|
|
} else {
|
|
hostname = host
|
|
}
|
|
|
|
labels := strings.Split(hostname, ".")
|
|
for i, label := range labels {
|
|
if i == len(labels)-1 && len(label) == 0 {
|
|
// Allow trailing dot for FQDN hosts.
|
|
continue
|
|
}
|
|
|
|
if !ValidHostLabel(label) {
|
|
errors.WriteString("\nendpoint host domain labels must match \"[a-zA-Z0-9-]{1,63}\", but found: ")
|
|
errors.WriteString(label)
|
|
}
|
|
}
|
|
|
|
if len(hostname) == 0 && len(port) != 0 {
|
|
errors.WriteString("\nendpoint host with port must not be empty")
|
|
}
|
|
|
|
if len(hostname) > 255 {
|
|
errors.WriteString(fmt.Sprintf("\nendpoint host must be less than 255 characters, but was %d", len(hostname)))
|
|
}
|
|
|
|
if len(errors.String()) > 0 {
|
|
return fmt.Errorf("invalid endpoint host%s", errors.String())
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// ValidPortNumber returns whether the port is valid RFC 3986 port.
|
|
func ValidPortNumber(port string) bool {
|
|
i, err := strconv.Atoi(port)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
|
|
if i < 0 || i > 65535 {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// ValidHostLabel returns whether the label is a valid RFC 3986 host abel.
|
|
func ValidHostLabel(label string) bool {
|
|
if l := len(label); l == 0 || l > 63 {
|
|
return false
|
|
}
|
|
for _, r := range label {
|
|
switch {
|
|
case r >= '0' && r <= '9':
|
|
case r >= 'A' && r <= 'Z':
|
|
case r >= 'a' && r <= 'z':
|
|
case r == '-':
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
return true
|
|
}
|