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Allow allowing/blocks hosts by IP range (#236)

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Blake Stoddard 2020-06-19 20:30:49 -04:00 • committed by GitHub
parent 3c7d08f311
commit f91e9cb508
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3 changed files with 16 additions and 2 deletions
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11
imageproxy.go
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@ -28,6 +28,7 @@ import (
"io/ioutil"
"log"
"mime"
"net"
"net/http"
"net/url"
"path"
@ -324,6 +325,16 @@ func hostMatches(hosts []string, u *url.URL) bool {
if strings.HasPrefix(host, "*.") && strings.HasSuffix(u.Host, host[2:]) {
return true
}
// Checks whether the host in u is an IP
if ip := net.ParseIP(u.Host); ip != nil {
// Checks whether our current host is a CIDR
if _, ipnet, err := net.ParseCIDR(host); err == nil {
// Checks if our host contains the IP in u
if ipnet.Contains(ip) {
return true
}
}
}
}
return false