cleanup(geolocate): use netxlite rather than netx (#756)

See https://github.com/ooni/probe/issues/2114

internal/engine/geolocate/geolocate.go

@@ -5,8 +5,8 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/ooni/probe-cli/v3/internal/engine/netx"
 	"github.com/ooni/probe-cli/v3/internal/model"
+	"github.com/ooni/probe-cli/v3/internal/netxlite"
 	"github.com/ooni/probe-cli/v3/internal/version"
 )
 
@@ -114,8 +114,7 @@ func NewTask(config Config) *Task {
 		config.UserAgent = fmt.Sprintf("ooniprobe-engine/%s", version.Version)
 	}
 	if config.Resolver == nil {
-		config.Resolver = netx.NewResolver(
-			netx.Config{Logger: config.Logger})
+		config.Resolver = netxlite.NewResolverStdlib(config.Logger)
 	}
 	return &Task{
 		countryLookupper:     mmdbLookupper{},

internal/engine/geolocate/iplookup.go

@@ -9,9 +9,9 @@ import (
 	"net/http"
 	"time"
 
-	"github.com/ooni/probe-cli/v3/internal/engine/netx"
 	"github.com/ooni/probe-cli/v3/internal/model"
 	"github.com/ooni/probe-cli/v3/internal/multierror"
+	"github.com/ooni/probe-cli/v3/internal/netxlite"
 )
 
 var (
@@ -86,10 +86,11 @@ func (c ipLookupClient) doWithCustomFunc(
 	// Implementation note: we MUST use an HTTP client that we're
 	// sure IS NOT using any proxy. To this end, we construct a
 	// client ourself that we know is not proxied.
-	clnt := &http.Client{Transport: netx.NewHTTPTransport(netx.Config{
-		Logger:       c.Logger,
-		FullResolver: c.Resolver,
-	})}
+	dialer := netxlite.NewDialerWithResolver(c.Logger, c.Resolver)
+	handshaker := netxlite.NewTLSHandshakerStdlib(c.Logger)
+	tlsDialer := netxlite.NewTLSDialer(dialer, handshaker)
+	txp := netxlite.NewHTTPTransport(c.Logger, dialer, tlsDialer)
+	clnt := &http.Client{Transport: txp}
 	defer clnt.CloseIdleConnections()
 	ip, err := fn(ctx, clnt, c.Logger, c.UserAgent)
 	if err != nil {

internal/engine/geolocate/iplookup_test.go

@@ -7,11 +7,14 @@ import (
 	"testing"
 
 	"github.com/apex/log"
+	"github.com/ooni/probe-cli/v3/internal/model"
+	"github.com/ooni/probe-cli/v3/internal/netxlite"
 )
 
 func TestIPLookupGood(t *testing.T) {
 	ip, err := (ipLookupClient{
 		Logger:    log.Log,
+		Resolver:  netxlite.NewResolverStdlib(model.DiscardLogger),
 		UserAgent: "ooniprobe-engine/0.1.0",
 	}).LookupProbeIP(context.Background())
 	if err != nil {
@@ -27,6 +30,7 @@ func TestIPLookupAllFailed(t *testing.T) {
 	cancel() // immediately cancel to cause Do() to fail
 	ip, err := (ipLookupClient{
 		Logger:    log.Log,
+		Resolver:  netxlite.NewResolverStdlib(model.DiscardLogger),
 		UserAgent: "ooniprobe-engine/0.1.0",
 	}).LookupProbeIP(ctx)
 	if !errors.Is(err, context.Canceled) {
@@ -41,6 +45,7 @@ func TestIPLookupInvalidIP(t *testing.T) {
 	ctx := context.Background()
 	ip, err := (ipLookupClient{
 		Logger:    log.Log,
+		Resolver:  netxlite.NewResolverStdlib(model.DiscardLogger),
 		UserAgent: "ooniprobe-engine/0.1.0",
 	}).doWithCustomFunc(ctx, invalidIPLookup)
 	if !errors.Is(err, ErrInvalidIPAddress) {