badguardhome/internal/dnsfilter
Ainar Garipov fc79e2e8f8 Pull request: all: support more $dnsrewrite rr types
Merge in DNS/adguard-home from 2102-dnsrewrite-2 to master

Updates #2102.
Updates #2452.

Squashed commit of the following:

commit b41e57731b4f276e97202e172fa400067174653d
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Dec 22 20:40:56 2020 +0300

    dnsforward: improve naming

commit 70b832ce969d8cdcf4224d221e5e1e2057fba6ee
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Dec 22 19:36:21 2020 +0300

    all: support more $dnsrewrite rr types
2020-12-23 12:35:07 +03:00
..
tests Pull request: * all: move internal Go packages to internal/ 2020-10-30 13:32:02 +03:00
README.md Pull request:* all: remove github.com/joomcode/errorx dependency 2020-11-05 15:20:57 +03:00
blocked.go Pull request #886: all: allow multiple rules in dns filter results 2020-12-17 13:32:46 +03:00
dnsfilter.go Pull request: all: add $dnsrewrite handling 2020-12-21 17:48:07 +03:00
dnsfilter_test.go Pull request: all: add $dnsrewrite handling 2020-12-21 17:48:07 +03:00
dnsrewrite.go Pull request: all: support more $dnsrewrite rr types 2020-12-23 12:35:07 +03:00
dnsrewrite_test.go Pull request: all: add $dnsrewrite handling 2020-12-21 17:48:07 +03:00
rewrites.go Pull request #886: all: allow multiple rules in dns filter results 2020-12-17 13:32:46 +03:00
rewrites_test.go Pull request #886: all: allow multiple rules in dns filter results 2020-12-17 13:32:46 +03:00
safebrowsing.go Pull request #886: all: allow multiple rules in dns filter results 2020-12-17 13:32:46 +03:00
safebrowsing_test.go Pull request #886: all: allow multiple rules in dns filter results 2020-12-17 13:32:46 +03:00
safesearch.go Pull request #886: all: allow multiple rules in dns filter results 2020-12-17 13:32:46 +03:00

README.md

AdGuard Home's DNS filtering go library

Example use:

[ -z "$GOPATH" ] && export GOPATH=$HOME/go
go get -d github.com/AdguardTeam/AdGuardHome/dnsfilter

Create file filter.go

package main

import (
    "github.com/AdguardTeam/AdGuardHome/dnsfilter"
    "log"
)

func main() {
    filter := dnsfilter.New()
    filter.AddRule("||dou*ck.net^")
    host := "www.doubleclick.net"
    res, err := filter.CheckHost(host)
    if err != nil {
        // temporary failure
        log.Fatalf("Failed to check host %q: %s", host, err)
    }
    if res.IsFiltered {
        log.Printf("Host %s is filtered, reason - %q, matched rule: %q", host, res.Reason, res.Rule)
    } else {
        log.Printf("Host %s is not filtered, reason - %q", host, res.Reason)
    }
}

And then run it:

go run filter.go

You will get:

2000/01/01 00:00:00 Host www.doubleclick.net is filtered, reason - 'FilteredBlackList', matched rule: '||dou*ck.net^'

You can also enable checking against AdGuard's SafeBrowsing:

package main

import (
    "github.com/AdguardTeam/AdGuardHome/dnsfilter"
    "log"
)

func main() {
    filter := dnsfilter.New()
    filter.EnableSafeBrowsing()
    host := "wmconvirus.narod.ru" // hostname for testing safebrowsing
    res, err := filter.CheckHost(host)
    if err != nil {
        // temporary failure
        log.Fatalf("Failed to check host %q: %s", host, err)
    }
    if res.IsFiltered {
        log.Printf("Host %s is filtered, reason - %q, matched rule: %q", host, res.Reason, res.Rule)
    } else {
        log.Printf("Host %s is not filtered, reason - %q", host, res.Reason)
    }
}