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domains.go
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domains.go
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package domains
import (
"context"
_ "embed"
"github.com/1f349/violet/database"
"github.com/1f349/violet/logger"
"github.com/1f349/violet/utils"
"github.com/mrmelon54/rescheduler"
"strings"
"sync"
)
var Logger = logger.Logger.WithPrefix("Violet Domains")
// Domains is the domain list and management system.
type Domains struct {
db *database.Queries
s *sync.RWMutex
m map[string]struct{}
r *rescheduler.Rescheduler
}
// New creates a new domain list
func New(db *database.Queries) *Domains {
a := &Domains{
db: db,
s: &sync.RWMutex{},
m: make(map[string]struct{}),
}
a.r = rescheduler.NewRescheduler(a.threadCompile)
return a
}
// IsValid returns true if a domain is valid.
func (d *Domains) IsValid(host string) bool {
domain, _, _ := utils.SplitDomainPort(host, 0)
// read lock for safety
d.s.RLock()
defer d.s.RUnlock()
// check root domains `www.example.com`, `example.com`, `com`
for len(domain) > 0 {
if _, ok := d.m[domain]; ok {
return true
}
n := strings.IndexByte(domain, '.')
if n == -1 {
break
}
domain = domain[n+1:]
}
return false
}
// Compile downloads the list of domains from the database and loads them into
// memory for faster lookups.
//
// This method makes use of the rescheduler instead of just ignoring multiple
// calls.
func (d *Domains) Compile() {
d.r.Run()
}
func (d *Domains) threadCompile() {
// new map
domainMap := make(map[string]struct{})
// compile map and check errors
err := d.internalCompile(domainMap)
if err != nil {
Logger.Info("Compile faile", "err", err)
return
}
// lock while replacing the map
d.s.Lock()
d.m = domainMap
d.s.Unlock()
}
// internalCompile is a hidden internal method for querying the database during
// the Compile() method.
func (d *Domains) internalCompile(m map[string]struct{}) error {
Logger.Info("Updating domains from database")
// sql or something?
rows, err := d.db.GetActiveDomains(context.Background())
if err != nil {
return err
}
for _, i := range rows {
m[i] = struct{}{}
}
// check for errors
return nil
}
func (d *Domains) Put(domain string, active bool) {
d.s.Lock()
defer d.s.Unlock()
err := d.db.AddDomain(context.Background(), database.AddDomainParams{
Domain: domain,
Active: active,
})
if err != nil {
logger.Logger.Infof("Database error: %s\n", err)
}
}
func (d *Domains) Delete(domain string) {
d.s.Lock()
defer d.s.Unlock()
err := d.db.DeleteDomain(context.Background(), domain)
if err != nil {
logger.Logger.Infof("Database error: %s\n", err)
}
}