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persistence.go
103 lines (90 loc) · 1.79 KB
/
persistence.go
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package ipcache
import (
"fmt"
"net"
"strings"
)
func (cache *Cache) SetPersistent(key string, data []net.IP) {
if cache.db == nil ||
len(data) == 0 ||
strings.HasSuffix(key, "googlevideo.com.") {
return
}
serialize := ""
for _, ip := range data {
if net.ParseIP("0.0.0.0").Equal(ip) ||
net.ParseIP("0000:0000:0000:0000:0000:0000:0000:0000").Equal(ip) {
return
}
serialize += ip.String() + ","
}
query := `
INSERT INTO a (key, value, discovered_on, last_used)
VALUES ($1, $2, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
ON CONFLICT (key) DO UPDATE
SET value = $2, last_used = CURRENT_TIMESTAMP
;
`
if cache.ipv6 {
query = `
INSERT INTO aaaa (key, value, discovered_on, last_used)
VALUES ($1, $2, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
ON CONFLICT (key) DO UPDATE
SET value = $2, last_used = CURRENT_TIMESTAMP
;
`
}
_, err := cache.db.Exec(query, key, serialize)
if err != nil {
fmt.Println(err.Error())
}
}
func (cache *Cache) GetPersistent(key string) (data []net.IP, found bool) {
if cache.db == nil {
return []net.IP{}, false
}
query := `
SELECT value
FROM a
WHERE key = $1
`
if cache.ipv6 {
query = `
SELECT value
FROM aaaa
WHERE key = $1
`
}
row := cache.db.QueryRow(query, key)
var serialize string
err := row.Scan(&serialize)
if err != nil {
return []net.IP{}, false
}
ips := []net.IP{}
for _, ip := range strings.Split(serialize, ",") {
if parsed := net.ParseIP(ip); parsed != nil {
ips = append(ips, parsed)
}
}
return ips, true
}
func (cache *Cache) DeletePersistent(key string) {
if cache.db == nil {
return
}
query := `
DELETE FROM a
WHERE key = $1
`
if cache.ipv6 {
query = `
DELETE FROM aaaa
WHERE key = $1
`
}
_, err := cache.db.Exec(query, key)
if err != nil {
fmt.Println(err.Error())
}
}