mirrors/AdGuardHome
1
0
Fork 0
mirror of https://github.com/AdguardTeam/AdGuardHome.git synced 2024-11-21 12:35:33 +03:00
Code Issues Projects Releases Packages Wiki Activity

Pull request 2176: AG-20945-rule-list-engine

Browse source 
Squashed commit of the following:

commit 56756b2299dd01d79dc9bdbe873ffdab30e78c58
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Mar 15 15:40:39 2024 +0300

    all: imp code, docs, tests

commit 45849e651ced92ebb889ff3902c7710e2161b5a3
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Thu Mar 14 20:18:07 2024 +0300

    rulelist: add engine, textengine
This commit is contained in:
Ainar Garipov 2024-03-15 17:23:36 +03:00
parent ee0144185f
commit c64a36c94d
15 changed files with 584 additions and 93 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
internal/filtering/blocked.go
View file

@ -8,6 +8,7 @@ import (
"time"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
"github.com/AdguardTeam/AdGuardHome/internal/filtering/rulelist"
"github.com/AdguardTeam/AdGuardHome/internal/schedule"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/urlfilter/rules"
@ -28,7 +29,7 @@ func initBlockedServices() {
for i, s := range blockedServices {
netRules := make([]*rules.NetworkRule, 0, len(s.Rules))
for _, text := range s.Rules {
rule, err := rules.NewNetworkRule(text, BlockedSvcsListID)
rule, err := rules.NewNetworkRule(text, rulelist.URLFilterIDBlockedService)
if err != nil {
log.Error("parsing blocked service %q rule %q: %s", s.ID, text, err)

2
internal/filtering/filter.go
View file

@ -608,7 +608,7 @@ func (d *DNSFilter) EnableFilters(async bool) {
func (d *DNSFilter) enableFiltersLocked(async bool) {
filters := make([]Filter, 1, len(d.conf.Filters)+len(d.conf.WhitelistFilters)+1)
filters[0] = Filter{
ID: CustomListID,
ID: rulelist.URLFilterIDCustom,
Data: []byte(strings.Join(d.conf.UserRules, "\n")),
}

17
internal/filtering/filtering.go
View file

@ -32,19 +32,6 @@ import (
"github.com/miekg/dns"
)
// The IDs of built-in filter lists.
//
// Keep in sync with client/src/helpers/constants.js.
// TODO(d.kolyshev): Add RewritesListID and don't forget to keep in sync.
const (
CustomListID = -iota
SysHostsListID
BlockedSvcsListID
ParentalListID
SafeBrowsingListID
SafeSearchListID
)
// ServiceEntry - blocked service array element
type ServiceEntry struct {
Name string
@ -1139,7 +1126,7 @@ func (d *DNSFilter) checkSafeBrowsing(
res = Result{
Rules: []*ResultRule{{
Text: "adguard-malware-shavar",
FilterListID: SafeBrowsingListID,
FilterListID: rulelist.URLFilterIDSafeBrowsing,
}},
Reason: FilteredSafeBrowsing,
IsFiltered: true,
@ -1171,7 +1158,7 @@ func (d *DNSFilter) checkParental(
res = Result{
Rules: []*ResultRule{{
Text: "parental CATEGORY_BLACKLISTED",
FilterListID: ParentalListID,
FilterListID: rulelist.URLFilterIDParentalControl,
}},
Reason: FilteredParental,
IsFiltered: true,

5
internal/filtering/hosts.go
View file

@ -4,6 +4,7 @@ import (
"fmt"
"net/netip"
"github.com/AdguardTeam/AdGuardHome/internal/filtering/rulelist"
"github.com/AdguardTeam/golibs/hostsfile"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/golibs/netutil"
@ -66,7 +67,7 @@ func hostsRewrites(
vals = append(vals, name)
rls = append(rls, &ResultRule{
Text: fmt.Sprintf("%s %s", addr, name),
FilterListID: SysHostsListID,
FilterListID: rulelist.URLFilterIDEtcHosts,
})
}
@ -84,7 +85,7 @@ func hostsRewrites(
}
rls = append(rls, &ResultRule{
Text: fmt.Sprintf("%s %s", addr, host),
FilterListID: SysHostsListID,
FilterListID: rulelist.URLFilterIDEtcHosts,
})
}

17
internal/filtering/hosts_test.go
View file

@ -8,6 +8,7 @@ import (
"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
"github.com/AdguardTeam/AdGuardHome/internal/aghtest"
"github.com/AdguardTeam/AdGuardHome/internal/filtering/rulelist"
"github.com/AdguardTeam/golibs/testutil"
"github.com/AdguardTeam/urlfilter/rules"
"github.com/miekg/dns"
@ -71,7 +72,7 @@ func TestDNSFilter_CheckHost_hostsContainer(t *testing.T) {
dtyp: dns.TypeA,
wantRules: []*ResultRule{{
Text: "1.2.3.4 v4.host.example",
FilterListID: SysHostsListID,
FilterListID: rulelist.URLFilterIDEtcHosts,
}},
wantResps: []rules.RRValue{addrv4},
}, {
@ -80,7 +81,7 @@ func TestDNSFilter_CheckHost_hostsContainer(t *testing.T) {
dtyp: dns.TypeAAAA,
wantRules: []*ResultRule{{
Text: "::1 v6.host.example",
FilterListID: SysHostsListID,
FilterListID: rulelist.URLFilterIDEtcHosts,
}},
wantResps: []rules.RRValue{addrv6},
}, {
@ -89,7 +90,7 @@ func TestDNSFilter_CheckHost_hostsContainer(t *testing.T) {
dtyp: dns.TypeAAAA,
wantRules: []*ResultRule{{
Text: "::ffff:1.2.3.4 mapped.host.example",
FilterListID: SysHostsListID,
FilterListID: rulelist.URLFilterIDEtcHosts,
}},
wantResps: []rules.RRValue{addrMapped},
}, {
@ -98,7 +99,7 @@ func TestDNSFilter_CheckHost_hostsContainer(t *testing.T) {
dtyp: dns.TypePTR,
wantRules: []*ResultRule{{
Text: "1.2.3.4 v4.host.example",
FilterListID: SysHostsListID,
FilterListID: rulelist.URLFilterIDEtcHosts,
}},
wantResps: []rules.RRValue{"v4.host.example"},
}, {
@ -107,7 +108,7 @@ func TestDNSFilter_CheckHost_hostsContainer(t *testing.T) {
dtyp: dns.TypePTR,
wantRules: []*ResultRule{{
Text: "::ffff:1.2.3.4 mapped.host.example",
FilterListID: SysHostsListID,
FilterListID: rulelist.URLFilterIDEtcHosts,
}},
wantResps: []rules.RRValue{"mapped.host.example"},
}, {
@ -134,7 +135,7 @@ func TestDNSFilter_CheckHost_hostsContainer(t *testing.T) {
dtyp: dns.TypeAAAA,
wantRules: []*ResultRule{{
Text: fmt.Sprintf("%s v4.host.example", addrv4),
FilterListID: SysHostsListID,
FilterListID: rulelist.URLFilterIDEtcHosts,
}},
wantResps: nil,
}, {
@ -143,7 +144,7 @@ func TestDNSFilter_CheckHost_hostsContainer(t *testing.T) {
dtyp: dns.TypeA,
wantRules: []*ResultRule{{
Text: fmt.Sprintf("%s v6.host.example", addrv6),
FilterListID: SysHostsListID,
FilterListID: rulelist.URLFilterIDEtcHosts,
}},
wantResps: nil,
}, {
@ -164,7 +165,7 @@ func TestDNSFilter_CheckHost_hostsContainer(t *testing.T) {
dtyp: dns.TypeA,
wantRules: []*ResultRule{{
Text: "4.3.2.1 v4.host.with-dup",
FilterListID: SysHostsListID,
FilterListID: rulelist.URLFilterIDEtcHosts,
}},
wantResps: []rules.RRValue{addrv4Dup},
}}

254
internal/filtering/rulelist/engine.go Normal file
View file

@ -0,0 +1,254 @@
package rulelist
import (
"context"
"fmt"
"net/http"
"sync"
"github.com/AdguardTeam/golibs/errors"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/urlfilter"
"github.com/AdguardTeam/urlfilter/filterlist"
"github.com/c2h5oh/datasize"
)
// Engine is a single DNS filter based on one or more rule lists. This
// structure contains the filtering engine combining several rule lists.
//
// TODO(a.garipov): Merge with [TextEngine] in some way?
type Engine struct {
// mu protects engine and storage.
//
// TODO(a.garipov): See if anything else should be protected.
mu *sync.RWMutex
// engine is the filtering engine.
engine *urlfilter.DNSEngine
// storage is the filtering-rule storage. It is saved here to close it.
storage *filterlist.RuleStorage
// name is the human-readable name of the engine, like "allowed", "blocked",
// or "custom".
name string
// filters is the data about rule filters in this engine.
filters []*Filter
}
// EngineConfig is the configuration for rule-list filtering engines created by
// combining refreshable filters.
type EngineConfig struct {
// Name is the human-readable name of this engine, like "allowed",
// "blocked", or "custom".
Name string
// Filters is the data about rule lists in this engine. There must be no
// other references to the elements of this slice.
Filters []*Filter
}
// NewEngine returns a new rule-list filtering engine. The engine is not
// refreshed, so a refresh should be performed before use.
func NewEngine(c *EngineConfig) (e *Engine) {
return &Engine{
mu: &sync.RWMutex{},
name: c.Name,
filters: c.Filters,
}
}
// Close closes the underlying rule-list engine as well as the rule lists.
func (e *Engine) Close() (err error) {
e.mu.Lock()
defer e.mu.Unlock()
if e.storage == nil {
return nil
}
err = e.storage.Close()
if err != nil {
return fmt.Errorf("closing engine %q: %w", e.name, err)
}
return nil
}
// FilterRequest returns the result of filtering req using the DNS filtering
// engine.
func (e *Engine) FilterRequest(
req *urlfilter.DNSRequest,
) (res *urlfilter.DNSResult, hasMatched bool) {
return e.currentEngine().MatchRequest(req)
}
// currentEngine returns the current filtering engine.
func (e *Engine) currentEngine() (enging *urlfilter.DNSEngine) {
e.mu.RLock()
defer e.mu.RUnlock()
return e.engine
}
// Refresh updates all rule lists in e. ctx is used for cancellation.
// parseBuf, cli, cacheDir, and maxSize are used for updates of rule-list
// filters; see [Filter.Refresh].
//
// TODO(a.garipov): Unexport and test in an internal test or through enigne
// tests.
func (e *Engine) Refresh(
ctx context.Context,
parseBuf []byte,
cli *http.Client,
cacheDir string,
maxSize datasize.ByteSize,
) (err error) {
defer func() { err = errors.Annotate(err, "updating engine %q: %w", e.name) }()
var filtersToRefresh []*Filter
for _, f := range e.filters {
if f.enabled {
filtersToRefresh = append(filtersToRefresh, f)
}
}
if len(filtersToRefresh) == 0 {
log.Info("filtering: updating engine %q: no rule-list filters", e.name)
return nil
}
engRefr := &engineRefresh{
httpCli: cli,
cacheDir: cacheDir,
engineName: e.name,
parseBuf: parseBuf,
maxSize: maxSize,
}
ruleLists, errs := engRefr.process(ctx, e.filters)
if isOneTimeoutError(errs) {
// Don't wrap the error since it's informative enough as is.
return err
}
storage, err := filterlist.NewRuleStorage(ruleLists)
if err != nil {
errs = append(errs, fmt.Errorf("creating rule storage: %w", err))
return errors.Join(errs...)
}
e.resetStorage(storage)
return errors.Join(errs...)
}
// resetStorage sets e.storage and e.engine and closes the previous storage.
// Errors from closing the previous storage are logged.
func (e *Engine) resetStorage(storage *filterlist.RuleStorage) {
e.mu.Lock()
defer e.mu.Unlock()
prevStorage := e.storage
e.storage, e.engine = storage, urlfilter.NewDNSEngine(storage)
if prevStorage == nil {
return
}
err := prevStorage.Close()
if err != nil {
log.Error("filtering: engine %q: closing old storage: %s", e.name, err)
}
}
// isOneTimeoutError returns true if the sole error in errs is either
// [context.Canceled] or [context.DeadlineExceeded].
func isOneTimeoutError(errs []error) (ok bool) {
if len(errs) != 1 {
return false
}
err := errs[0]
return errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded)
}
// engineRefresh represents a single ongoing engine refresh.
type engineRefresh struct {
httpCli *http.Client
cacheDir string
engineName string
parseBuf []byte
maxSize datasize.ByteSize
}
// process runs updates of all given rule-list filters. All errors are logged
// as they appear, since the update can take a significant amount of time.
// errs contains all errors that happened during the update, unless the context
// is canceled or its deadline is reached, in which case errs will only contain
// a single timeout error.
//
// TODO(a.garipov): Think of a better way to communicate the timeout condition?
func (r *engineRefresh) process(
ctx context.Context,
filters []*Filter,
) (ruleLists []filterlist.RuleList, errs []error) {
ruleLists = make([]filterlist.RuleList, 0, len(filters))
for i, f := range filters {
select {
case <-ctx.Done():
return nil, []error{fmt.Errorf("timeout after updating %d filters: %w", i, ctx.Err())}
default:
// Go on.
}
err := r.processFilter(ctx, f)
if err == nil {
ruleLists = append(ruleLists, f.ruleList)
continue
}
errs = append(errs, err)
// Also log immediately, since the update can take a lot of time.
log.Error(
"filtering: updating engine %q: rule list %s from url %q: %s\n",
r.engineName,
f.uid,
f.url,
err,
)
}
return ruleLists, errs
}
// processFilter runs an update of a single rule-list filter.
func (r *engineRefresh) processFilter(ctx context.Context, f *Filter) (err error) {
prevChecksum := f.checksum
parseRes, err := f.Refresh(ctx, r.parseBuf, r.httpCli, r.cacheDir, r.maxSize)
if err != nil {
return fmt.Errorf("updating %s: %w", f.uid, err)
}
if prevChecksum == parseRes.Checksum {
log.Info("filtering: engine %q: filter %q: no change", r.engineName, f.uid)
return nil
}
log.Info(
"filtering: updated engine %q: filter %q: %d bytes, %d rules",
r.engineName,
f.uid,
parseRes.BytesWritten,
parseRes.RulesCount,
)
return nil
}

63
internal/filtering/rulelist/engine_test.go Normal file
View file

@ -0,0 +1,63 @@
package rulelist_test
import (
"context"
"net/http"
"testing"
"github.com/AdguardTeam/AdGuardHome/internal/filtering/rulelist"
"github.com/AdguardTeam/golibs/testutil"
"github.com/AdguardTeam/urlfilter"
"github.com/miekg/dns"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestEngine_Refresh(t *testing.T) {
cacheDir := t.TempDir()
fileURL, srvURL := newFilterLocations(t, cacheDir, testRuleTextBlocked, testRuleTextBlocked2)
fileFlt := newFilter(t, fileURL, "File Filter")
httpFlt := newFilter(t, srvURL, "HTTP Filter")
eng := rulelist.NewEngine(&rulelist.EngineConfig{
Name: "Engine",
Filters: []*rulelist.Filter{fileFlt, httpFlt},
})
require.NotNil(t, eng)
testutil.CleanupAndRequireSuccess(t, eng.Close)
ctx, cancel := context.WithTimeout(context.Background(), testTimeout)
t.Cleanup(cancel)
buf := make([]byte, rulelist.DefaultRuleBufSize)
cli := &http.Client{
Timeout: testTimeout,
}
err := eng.Refresh(ctx, buf, cli, cacheDir, rulelist.DefaultMaxRuleListSize)
require.NoError(t, err)
fltReq := &urlfilter.DNSRequest{
Hostname: "blocked.example",
Answer: false,
DNSType: dns.TypeA,
}
fltRes, hasMatched := eng.FilterRequest(fltReq)
assert.True(t, hasMatched)
require.NotNil(t, fltRes)
fltReq = &urlfilter.DNSRequest{
Hostname: "blocked-2.example",
Answer: false,
DNSType: dns.TypeA,
}
fltRes, hasMatched = eng.FilterRequest(fltReq)
assert.True(t, hasMatched)
require.NotNil(t, fltRes)
}

44
internal/filtering/rulelist/filter.go
View file

@ -14,7 +14,6 @@ import (
"github.com/AdguardTeam/AdGuardHome/internal/aghrenameio"
"github.com/AdguardTeam/golibs/errors"
"github.com/AdguardTeam/golibs/ioutil"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/urlfilter/filterlist"
"github.com/c2h5oh/datasize"
)
@ -52,8 +51,6 @@ type Filter struct {
checksum uint32
// enabled, if true, means that this rule-list filter is used for filtering.
//
// TODO(a.garipov): Take into account.
enabled bool
}
@ -106,6 +103,11 @@ func NewFilter(c *FilterConfig) (f *Filter, err error) {
// Refresh updates the data in the rule-list filter. parseBuf is the initial
// buffer used to parse information from the data. cli and maxSize are only
// used when f is a URL-based list.
//
// TODO(a.garipov): Unexport and test in an internal test or through enigne
// tests.
//
// TODO(a.garipov): Consider not returning parseRes.
func (f *Filter) Refresh(
ctx context.Context,
parseBuf []byte,
@ -300,39 +302,3 @@ func (f *Filter) Close() (err error) {
return f.ruleList.Close()
}
// filterUpdate represents a single ongoing rule-list filter update.
//
//lint:ignore U1000 TODO(a.garipov): Use.
type filterUpdate struct {
httpCli *http.Client
cacheDir string
name string
parseBuf []byte
maxSize datasize.ByteSize
}
// process runs an update of a single rule-list.
func (u *filterUpdate) process(ctx context.Context, f *Filter) (err error) {
prevChecksum := f.checksum
parseRes, err := f.Refresh(ctx, u.parseBuf, u.httpCli, u.cacheDir, u.maxSize)
if err != nil {
return fmt.Errorf("updating %s: %w", f.uid, err)
}
if prevChecksum == parseRes.Checksum {
log.Info("filtering: filter %q: filter %q: no change", u.name, f.uid)
return nil
}
log.Info(
"filtering: updated filter %q: filter %q: %d bytes, %d rules",
u.name,
f.uid,
parseRes.BytesWritten,
parseRes.RulesCount,
)
return nil
}

23
internal/filtering/rulelist/filter_test.go
View file

@ -2,9 +2,7 @@ package rulelist_test
import (
"context"
"io"
"net/http"
"net/http/httptest"
"net/url"
"os"
"path/filepath"
@ -20,23 +18,8 @@ func TestFilter_Refresh(t *testing.T) {
cacheDir := t.TempDir()
uid := rulelist.MustNewUID()
initialFile := filepath.Join(cacheDir, "initial.txt")
initialData := []byte(
testRuleTextTitle +
testRuleTextBlocked,
)
writeErr := os.WriteFile(initialFile, initialData, 0o644)
require.NoError(t, writeErr)
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
pt := testutil.PanicT{}
_, err := io.WriteString(w, testRuleTextTitle+testRuleTextBlocked)
require.NoError(pt, err)
}))
srvURL, urlErr := url.Parse(srv.URL)
require.NoError(t, urlErr)
const fltData = testRuleTextTitle + testRuleTextBlocked
fileURL, srvURL := newFilterLocations(t, cacheDir, fltData, fltData)
testCases := []struct {
url *url.URL
@ -56,7 +39,7 @@ func TestFilter_Refresh(t *testing.T) {
name: "file",
url: &url.URL{
Scheme: "file",
Path: initialFile,
Path: fileURL.Path,
},
wantNewErrMsg: "",
}, {

20
internal/filtering/rulelist/rulelist.go
View file

@ -23,8 +23,28 @@ const DefaultMaxRuleListSize = 64 * datasize.MB
// URLFilterID is a semantic type-alias for IDs used for working with package
// urlfilter.
//
// TODO(a.garipov): Use everywhere in package filtering.
type URLFilterID = int
// The IDs of built-in filter lists.
//
// NOTE: Do not change without the need for it and keep in sync with
// client/src/helpers/constants.js.
//
// TODO(a.garipov): Add type [URLFilterID] once it is used consistently in
// package filtering.
//
// TODO(d.kolyshev): Add URLFilterIDLegacyRewrite here and to the UI.
const (
URLFilterIDCustom = 0
URLFilterIDEtcHosts = -1
URLFilterIDBlockedService = -2
URLFilterIDParentalControl = -3
URLFilterIDSafeBrowsing = -4
URLFilterIDSafeSearch = -5
)
// UID is the type for the unique IDs of filtering-rule lists.
type UID uuid.UUID

75
internal/filtering/rulelist/rulelist_test.go
View file

@ -1,11 +1,19 @@
package rulelist_test
import (
"io"
"net/http"
"net/http/httptest"
"net/url"
"os"
"path/filepath"
"sync/atomic"
"testing"
"time"
"github.com/AdguardTeam/AdGuardHome/internal/filtering/rulelist"
"github.com/AdguardTeam/golibs/testutil"
"github.com/stretchr/testify/require"
)
func TestMain(m *testing.M) {
@ -35,3 +43,70 @@ const (
// See https://github.com/AdguardTeam/AdGuardHome/issues/6003.
testRuleTextCosmetic = "||cosmetic.example## :has-text(/\u200c/i)\n"
)
// urlFilterIDCounter is the atomic integer used to create unique filter IDs.
var urlFilterIDCounter = &atomic.Int32{}
// newURLFilterID returns a new unique URLFilterID.
func newURLFilterID() (id rulelist.URLFilterID) {
return rulelist.URLFilterID(urlFilterIDCounter.Add(1))
}
// newFilter is a helper for creating new filters in tests. It does not
// register the closing of the filter using t.Cleanup; callers must do that
// either directly or by using the filter in an engine.
func newFilter(t testing.TB, u *url.URL, name string) (f *rulelist.Filter) {
t.Helper()
f, err := rulelist.NewFilter(&rulelist.FilterConfig{
URL: u,
Name: name,
UID: rulelist.MustNewUID(),
URLFilterID: newURLFilterID(),
Enabled: true,
})
require.NoError(t, err)
return f
}
// newFilterLocations is a test helper that sets up both the filtering-rule list
// file and the HTTP-server. It also registers file removal and server stopping
// using t.Cleanup.
func newFilterLocations(
t testing.TB,
cacheDir string,
fileData string,
httpData string,
) (fileURL, srvURL *url.URL) {
filePath := filepath.Join(cacheDir, "initial.txt")
err := os.WriteFile(filePath, []byte(fileData), 0o644)
require.NoError(t, err)
testutil.CleanupAndRequireSuccess(t, func() (err error) {
return os.Remove(filePath)
})
fileURL = &url.URL{
Scheme: "file",
Path: filePath,
}
srv := newStringHTTPServer(httpData)
t.Cleanup(srv.Close)
srvURL, err = url.Parse(srv.URL)
require.NoError(t, err)
return fileURL, srvURL
}
// newStringHTTPServer returns a new HTTP server that serves s.
func newStringHTTPServer(s string) (srv *httptest.Server) {
return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
pt := testutil.PanicT{}
_, err := io.WriteString(w, s)
require.NoError(pt, err)
}))
}

98
internal/filtering/rulelist/textengine.go Normal file
View file

@ -0,0 +1,98 @@
package rulelist
import (
"fmt"
"strings"
"sync"
"github.com/AdguardTeam/urlfilter"
"github.com/AdguardTeam/urlfilter/filterlist"
)
// TextEngine is a single DNS filter based on a list of rules in text form.
type TextEngine struct {
// mu protects engine and storage.
mu *sync.RWMutex
// engine is the filtering engine.
engine *urlfilter.DNSEngine
// storage is the filtering-rule storage. It is saved here to close it.
storage *filterlist.RuleStorage
// name is the human-readable name of the engine, like "custom".
name string
}
// TextEngineConfig is the configuration for a rule-list filtering engine
// created from a filtering rule text.
type TextEngineConfig struct {
// Name is the human-readable name of this engine, like "allowed",
// "blocked", or "custom".
Name string
// Rules is the text of the filtering rules for this engine.
Rules []string
// ID is the ID to use inside a URL-filter engine.
ID URLFilterID
}
// NewTextEngine returns a new rule-list filtering engine that uses rules
// directly. The engine is ready to use and should not be refreshed.
func NewTextEngine(c *TextEngineConfig) (e *TextEngine, err error) {
text := strings.Join(c.Rules, "\n")
storage, err := filterlist.NewRuleStorage([]filterlist.RuleList{
&filterlist.StringRuleList{
RulesText: text,
ID: c.ID,
IgnoreCosmetic: true,
},
})
if err != nil {
return nil, fmt.Errorf("creating rule storage: %w", err)
}
engine := urlfilter.NewDNSEngine(storage)
return &TextEngine{
mu: &sync.RWMutex{},
engine: engine,
storage: storage,
name: c.Name,
}, nil
}
// FilterRequest returns the result of filtering req using the DNS filtering
// engine.
func (e *TextEngine) FilterRequest(
req *urlfilter.DNSRequest,
) (res *urlfilter.DNSResult, hasMatched bool) {
var engine *urlfilter.DNSEngine
func() {
e.mu.RLock()
defer e.mu.RUnlock()
engine = e.engine
}()
return engine.MatchRequest(req)
}
// Close closes the underlying rule list engine as well as the rule lists.
func (e *TextEngine) Close() (err error) {
e.mu.Lock()
defer e.mu.Unlock()
if e.storage == nil {
return nil
}
err = e.storage.Close()
if err != nil {
return fmt.Errorf("closing text engine %q: %w", e.name, err)
}
return nil
}

40
internal/filtering/rulelist/textengine_test.go Normal file
View file

@ -0,0 +1,40 @@
package rulelist_test
import (
"testing"
"github.com/AdguardTeam/AdGuardHome/internal/filtering/rulelist"
"github.com/AdguardTeam/golibs/testutil"
"github.com/AdguardTeam/urlfilter"
"github.com/miekg/dns"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestNewTextEngine(t *testing.T) {
eng, err := rulelist.NewTextEngine(&rulelist.TextEngineConfig{
Name: "RulesEngine",
Rules: []string{
testRuleTextTitle,
testRuleTextBlocked,
},
ID: testURLFilterID,
})
require.NoError(t, err)
require.NotNil(t, eng)
testutil.CleanupAndRequireSuccess(t, eng.Close)
fltReq := &urlfilter.DNSRequest{
Hostname: "blocked.example",
Answer: false,
DNSType: dns.TypeA,
}
fltRes, hasMatched := eng.FilterRequest(fltReq)
assert.True(t, hasMatched)
require.NotNil(t, fltRes)
require.NotNil(t, fltRes.NetworkRule)
assert.Equal(t, fltRes.NetworkRule.FilterListID, testURLFilterID)
}

7
internal/filtering/safesearch/safesearch.go
View file

@ -14,6 +14,7 @@ import (
"time"
"github.com/AdguardTeam/AdGuardHome/internal/filtering"
"github.com/AdguardTeam/AdGuardHome/internal/filtering/rulelist"
"github.com/AdguardTeam/golibs/cache"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/urlfilter"
@ -98,7 +99,7 @@ func NewDefault(
cacheTTL: cacheTTL,
}
err = ss.resetEngine(filtering.SafeSearchListID, conf)
err = ss.resetEngine(rulelist.URLFilterIDSafeSearch, conf)
if err != nil {
// Don't wrap the error, because it's informative enough as is.
return nil, err
@ -234,7 +235,7 @@ func (ss *Default) newResult(
) (res *filtering.Result, err error) {
res = &filtering.Result{
Rules: []*filtering.ResultRule{{
FilterListID: filtering.SafeSearchListID,
FilterListID: rulelist.URLFilterIDSafeSearch,
}},
Reason: filtering.FilteredSafeSearch,
IsFiltered: true,
@ -368,7 +369,7 @@ func (ss *Default) Update(conf filtering.SafeSearchConfig) (err error) {
ss.mu.Lock()
defer ss.mu.Unlock()
err = ss.resetEngine(filtering.SafeSearchListID, conf)
err = ss.resetEngine(rulelist.URLFilterIDSafeSearch, conf)
if err != nil {
// Don't wrap the error, because it's informative enough as is.
return err

9
internal/filtering/safesearch/safesearch_test.go
View file

@ -9,6 +9,7 @@ import (
"github.com/AdguardTeam/AdGuardHome/internal/aghtest"
"github.com/AdguardTeam/AdGuardHome/internal/filtering"
"github.com/AdguardTeam/AdGuardHome/internal/filtering/rulelist"
"github.com/AdguardTeam/AdGuardHome/internal/filtering/safesearch"
"github.com/AdguardTeam/golibs/testutil"
"github.com/miekg/dns"
@ -69,7 +70,7 @@ func TestDefault_CheckHost_yandex(t *testing.T) {
require.Len(t, res.Rules, 1)
assert.Equal(t, yandexIP, res.Rules[0].IP)
assert.EqualValues(t, filtering.SafeSearchListID, res.Rules[0].FilterListID)
assert.EqualValues(t, rulelist.URLFilterIDSafeSearch, res.Rules[0].FilterListID)
}
}
@ -89,7 +90,7 @@ func TestDefault_CheckHost_yandexAAAA(t *testing.T) {
require.Len(t, res.Rules, 1)
assert.Empty(t, res.Rules[0].IP)
assert.EqualValues(t, filtering.SafeSearchListID, res.Rules[0].FilterListID)
assert.EqualValues(t, rulelist.URLFilterIDSafeSearch, res.Rules[0].FilterListID)
}
func TestDefault_CheckHost_google(t *testing.T) {
@ -128,7 +129,7 @@ func TestDefault_CheckHost_google(t *testing.T) {
require.Len(t, res.Rules, 1)
assert.Equal(t, wantIP, res.Rules[0].IP)
assert.EqualValues(t, filtering.SafeSearchListID, res.Rules[0].FilterListID)
assert.EqualValues(t, rulelist.URLFilterIDSafeSearch, res.Rules[0].FilterListID)
})
}
}
@ -180,7 +181,7 @@ func TestDefault_CheckHost_duckduckgoAAAA(t *testing.T) {
require.Len(t, res.Rules, 1)
assert.Empty(t, res.Rules[0].IP)
assert.EqualValues(t, filtering.SafeSearchListID, res.Rules[0].FilterListID)
assert.EqualValues(t, rulelist.URLFilterIDSafeSearch, res.Rules[0].FilterListID)
}
func TestDefault_Update(t *testing.T) {