javascript: pooling and reuse with export functions + misc updates (#4709)

* js hotfix: wrap javascript source in anon functions

* mysql module improvements

* misc mysql bugs

* js vm pooling: soft deprecation + incentivised pooling

* misc updates

* disable interactsh failed test

* disable interactsh.yaml integration test on win & mac

cmd/integration-test/interactsh.go

@@ -1,9 +1,11 @@
 package main
 
+import osutils "github.com/projectdiscovery/utils/os"
+
 // All Interactsh related testcases
 var interactshTestCases = []TestCaseInfo{
-	{Path: "protocols/http/interactsh.yaml", TestCase: &httpInteractshRequest{}, DisableOn: func() bool { return false }},
-	{Path: "protocols/http/interactsh-stop-at-first-match.yaml", TestCase: &httpInteractshStopAtFirstMatchRequest{}, DisableOn: func() bool { return false }}, // disable this test for now
-	{Path: "protocols/http/default-matcher-condition.yaml", TestCase: &httpDefaultMatcherCondition{}, DisableOn: func() bool { return false }},
+	{Path: "protocols/http/interactsh.yaml", TestCase: &httpInteractshRequest{}, DisableOn: func() bool { return osutils.IsWindows() || osutils.IsOSX() }},
+	{Path: "protocols/http/interactsh-stop-at-first-match.yaml", TestCase: &httpInteractshStopAtFirstMatchRequest{}, DisableOn: func() bool { return true }}, // disable this test for now
+	{Path: "protocols/http/default-matcher-condition.yaml", TestCase: &httpDefaultMatcherCondition{}, DisableOn: func() bool { return true }},
 	{Path: "protocols/http/interactsh-requests-mc-and.yaml", TestCase: &httpInteractshRequestsWithMCAnd{}},
 }

pkg/js/compiler/compiler.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/projectdiscovery/nuclei/v3/pkg/protocols/common/generators"
 	contextutil "github.com/projectdiscovery/utils/context"
+	stringsutil "github.com/projectdiscovery/utils/strings"
 )
 
 // Compiler provides a runtime to execute goja runtime
@@ -33,6 +34,11 @@ type ExecuteOptions struct {
 
 	/// Timeout for this script execution
 	Timeout int
+	// Source is original source of the script
+	Source *string
+
+	// Manually exported objects
+	exports map[string]interface{}
 }
 
 // ExecuteArgs is the arguments to pass to the script.
@@ -67,7 +73,7 @@ func (e ExecuteResult) GetSuccess() bool {
 
 // Execute executes a script with the default options.
 func (c *Compiler) Execute(code string, args *ExecuteArgs) (ExecuteResult, error) {
-	p, err := goja.Compile("", code, false)
+	p, err := WrapScriptNCompile(code, false)
 	if err != nil {
 		return nil, err
 	}
@@ -108,10 +114,33 @@ func (c *Compiler) ExecuteWithOptions(program *goja.Program, args *ExecuteArgs,
 				err = fmt.Errorf("panic: %v", r)
 			}
 		}()
-		return executeProgram(program, args, opts)
+		return ExecuteProgram(program, args, opts)
 	})
 	if err != nil {
 		return nil, err
 	}
-	return ExecuteResult{"response": results.Export(), "success": results.ToBoolean()}, nil
+	var res ExecuteResult
+	if opts.exports != nil {
+		res = ExecuteResult(opts.exports)
+		opts.exports = nil
+	} else {
+		res = NewExecuteResult()
+	}
+	res["response"] = results.Export()
+	res["success"] = results.ToBoolean()
+	return res, nil
+}
+
+// Wraps a script in a function and compiles it.
+func WrapScriptNCompile(script string, strict bool) (*goja.Program, error) {
+	if !stringsutil.ContainsAny(script, exportAsToken, exportToken) {
+		// this will not be run in a pooled runtime
+		return goja.Compile("", script, strict)
+	}
+	val := fmt.Sprintf(`
+		(function() {
+			%s
+		})()
+	`, script)
+	return goja.Compile("", val, strict)
 }

pkg/js/compiler/init.go

@@ -7,7 +7,8 @@ import "github.com/projectdiscovery/nuclei/v3/pkg/types"
 var (
 	// Per Execution Javascript timeout in seconds
 	JsProtocolTimeout       = 10
-	JsVmConcurrency   = 500
+	PoolingJsVmConcurrency  = 100
+	NonPoolingVMConcurrency = 20
 )
 
 // Init initializes the javascript protocol
@@ -21,6 +22,7 @@ func Init(opts *types.Options) error {
 		opts.JsConcurrency = 100
 	}
 	JsProtocolTimeout = opts.Timeout
-	JsVmConcurrency = opts.JsConcurrency
+	PoolingJsVmConcurrency = opts.JsConcurrency
+	PoolingJsVmConcurrency -= NonPoolingVMConcurrency
 	return nil
 }

pkg/js/compiler/non-pool.go

@@ -0,0 +1,23 @@
+package compiler
+
+import (
+	"sync"
+
+	"github.com/dop251/goja"
+	"github.com/remeh/sizedwaitgroup"
+)
+
+var (
+	ephemeraljsc    = sizedwaitgroup.New(NonPoolingVMConcurrency)
+	lazyFixedSgInit = sync.OnceFunc(func() {
+		ephemeraljsc = sizedwaitgroup.New(NonPoolingVMConcurrency)
+	})
+)
+
+func executeWithoutPooling(p *goja.Program, args *ExecuteArgs, opts *ExecuteOptions) (result goja.Value, err error) {
+	lazyFixedSgInit()
+	ephemeraljsc.Add()
+	defer ephemeraljsc.Done()
+	runtime := createNewRuntime()
+	return executeWithRuntime(runtime, p, args, opts)
+}

pkg/js/compiler/pool.go

@@ -1,7 +1,10 @@
 package compiler
 
 import (
+	"bytes"
+	"encoding/json"
 	"fmt"
+	"reflect"
 	"sync"
 
 	"github.com/dop251/goja"
@@ -29,11 +32,18 @@ import (
 	_ "github.com/projectdiscovery/nuclei/v3/pkg/js/generated/go/libtelnet"
 	_ "github.com/projectdiscovery/nuclei/v3/pkg/js/generated/go/libvnc"
 	"github.com/projectdiscovery/nuclei/v3/pkg/js/global"
+	"github.com/projectdiscovery/nuclei/v3/pkg/js/gojs"
 	"github.com/projectdiscovery/nuclei/v3/pkg/js/libs/goconsole"
 	"github.com/projectdiscovery/nuclei/v3/pkg/protocols/common/protocolstate"
+	stringsutil "github.com/projectdiscovery/utils/strings"
 	"github.com/remeh/sizedwaitgroup"
 )
 
+const (
+	exportToken   = "Export"
+	exportAsToken = "ExportAs"
+)
+
 var (
 	r                *require.Registry
 	lazyRegistryInit = sync.OnceFunc(func() {
@@ -41,40 +51,19 @@ var (
 		// autoregister console node module with default printer it uses gologger backend
 		require.RegisterNativeModule(console.ModuleName, console.RequireWithPrinter(goconsole.NewGoConsolePrinter()))
 	})
-	sg         sizedwaitgroup.SizedWaitGroup
+	pooljsc    sizedwaitgroup.SizedWaitGroup
 	lazySgInit = sync.OnceFunc(func() {
-		sg = sizedwaitgroup.New(JsVmConcurrency)
+		pooljsc = sizedwaitgroup.New(PoolingJsVmConcurrency)
 	})
 )
 
-func getRegistry() *require.Registry {
-	lazyRegistryInit()
-	return r
-}
-
 var gojapool = &sync.Pool{
 	New: func() interface{} {
-		runtime := protocolstate.NewJSRuntime()
-		_ = getRegistry().Enable(runtime)
-		// by default import below modules every time
-		_ = runtime.Set("console", require.Require(runtime, console.ModuleName))
-
-		// Register embedded javacript helpers
-		if err := global.RegisterNativeScripts(runtime); err != nil {
-			gologger.Error().Msgf("Could not register scripts: %s\n", err)
-		}
-		return runtime
+		return createNewRuntime()
 	},
 }
 
-// executes the actual js program
-func executeProgram(p *goja.Program, args *ExecuteArgs, opts *ExecuteOptions) (result goja.Value, err error) {
-	// its unknown (most likely cannot be done) to limit max js runtimes at a moment without making it static
-	// unlike sync.Pool which reacts to GC and its purposes is to reuse objects rather than creating new ones
-	lazySgInit()
-	sg.Add()
-	defer sg.Done()
-	runtime := gojapool.Get().(*goja.Runtime)
+func executeWithRuntime(runtime *goja.Runtime, p *goja.Program, args *ExecuteArgs, opts *ExecuteOptions) (result goja.Value, err error) {
 	defer func() {
 		// reset before putting back to pool
 		_ = runtime.GlobalObject().Delete("template") // template ctx
@@ -85,7 +74,6 @@ func executeProgram(p *goja.Program, args *ExecuteArgs, opts *ExecuteOptions) (r
 		if opts != nil && opts.Cleanup != nil {
 			opts.Cleanup(runtime)
 		}
-		gojapool.Put(runtime)
 	}()
 	defer func() {
 		if r := recover(); r != nil {
@@ -109,8 +97,126 @@ func executeProgram(p *goja.Program, args *ExecuteArgs, opts *ExecuteOptions) (r
 	return runtime.RunProgram(p)
 }
 
+// ExecuteProgram executes a compiled program with the default options.
+// it deligates if a particular program should run in a pooled or non-pooled runtime
+func ExecuteProgram(p *goja.Program, args *ExecuteArgs, opts *ExecuteOptions) (result goja.Value, err error) {
+	if opts.Source == nil {
+		// not-recommended anymore
+		return executeWithoutPooling(p, args, opts)
+	}
+	if !stringsutil.ContainsAny(*opts.Source, exportAsToken, exportToken) {
+		// not-recommended anymore
+		return executeWithoutPooling(p, args, opts)
+	}
+	return executeWithPoolingProgram(p, args, opts)
+}
+
+// executes the actual js program
+func executeWithPoolingProgram(p *goja.Program, args *ExecuteArgs, opts *ExecuteOptions) (result goja.Value, err error) {
+	// its unknown (most likely cannot be done) to limit max js runtimes at a moment without making it static
+	// unlike sync.Pool which reacts to GC and its purposes is to reuse objects rather than creating new ones
+	lazySgInit()
+	pooljsc.Add()
+	defer pooljsc.Done()
+	runtime := gojapool.Get().(*goja.Runtime)
+	defer gojapool.Put(runtime)
+	var buff bytes.Buffer
+	opts.exports = make(map[string]interface{})
+
+	defer func() {
+		// remove below functions from runtime
+		_ = runtime.GlobalObject().Delete(exportAsToken)
+		_ = runtime.GlobalObject().Delete(exportToken)
+	}()
+	// register export functions
+	_ = gojs.RegisterFuncWithSignature(runtime, gojs.FuncOpts{
+		Name:        "Export", // we use string instead of const for documentation generation
+		Signatures:  []string{"Export(value any)"},
+		Description: "Converts a given value to a string and is appended to output of script",
+		FuncDecl: func(call goja.FunctionCall, runtime *goja.Runtime) goja.Value {
+			if len(call.Arguments) == 0 {
+				return goja.Null()
+			}
+			for _, arg := range call.Arguments {
+				value := arg.Export()
+				if out := stringify(value); out != "" {
+					buff.WriteString(out)
+				}
+			}
+			return goja.Null()
+		},
+	})
+	// register exportAs function
+	_ = gojs.RegisterFuncWithSignature(runtime, gojs.FuncOpts{
+		Name:        "ExportAs", // Export
+		Signatures:  []string{"ExportAs(key string,value any)"},
+		Description: "Exports given value with specified key and makes it available in DSL and response",
+		FuncDecl: func(call goja.FunctionCall, runtime *goja.Runtime) goja.Value {
+			if len(call.Arguments) != 2 {
+				// this is how goja expects errors to be returned
+				// and internally it is done same way for all errors
+				panic(runtime.ToValue("ExportAs expects 2 arguments"))
+			}
+			key := call.Argument(0).String()
+			value := call.Argument(1).Export()
+			opts.exports[key] = stringify(value)
+			return goja.Null()
+		},
+	})
+	val, err := executeWithRuntime(runtime, p, args, opts)
+	if err != nil {
+		return nil, err
+	}
+	if val.Export() != nil {
+		// append last value to output
+		buff.WriteString(stringify(val.Export()))
+	}
+	// and return it as result
+	return runtime.ToValue(buff.String()), nil
+}
+
 // Internal purposes i.e generating bindings
 func InternalGetGeneratorRuntime() *goja.Runtime {
 	runtime := gojapool.Get().(*goja.Runtime)
 	return runtime
 }
+
+func getRegistry() *require.Registry {
+	lazyRegistryInit()
+	return r
+}
+
+func createNewRuntime() *goja.Runtime {
+	runtime := protocolstate.NewJSRuntime()
+	_ = getRegistry().Enable(runtime)
+	// by default import below modules every time
+	_ = runtime.Set("console", require.Require(runtime, console.ModuleName))
+
+	// Register embedded javacript helpers
+	if err := global.RegisterNativeScripts(runtime); err != nil {
+		gologger.Error().Msgf("Could not register scripts: %s\n", err)
+	}
+	return runtime
+}
+
+// stringify converts a given value to string
+// if its a struct it will be marshalled to json
+func stringify(value interface{}) string {
+	if value == nil {
+		return ""
+	}
+	kind := reflect.TypeOf(value).Kind()
+	if kind == reflect.Struct || kind == reflect.Ptr && reflect.ValueOf(value).Elem().Kind() == reflect.Struct {
+		// marshal structs or struct pointers to json automatically
+		val := value
+		if kind == reflect.Ptr {
+			val = reflect.ValueOf(value).Elem().Interface()
+		}
+		bin, err := json.Marshal(val)
+		if err == nil {
+			return string(bin)
+		}
+	}
+	// for everything else stringify
+	return fmt.Sprintf("%v", value)
+}

pkg/js/libs/mysql/mysql.go

@@ -7,13 +7,12 @@ import (
 	"io"
 	"log"
 	"net"
-	"net/url"
 	"time"
 
 	"github.com/go-sql-driver/mysql"
 	"github.com/praetorian-inc/fingerprintx/pkg/plugins"
 	mysqlplugin "github.com/praetorian-inc/fingerprintx/pkg/plugins/services/mysql"
-	utils "github.com/projectdiscovery/nuclei/v3/pkg/js/utils"
+	"github.com/projectdiscovery/nuclei/v3/pkg/js/utils"
 	"github.com/projectdiscovery/nuclei/v3/pkg/protocols/common/protocolstate"
 )
 
@@ -22,16 +21,6 @@ import (
 // Internally client uses go-sql-driver/mysql driver.
 type MySQLClient struct{}
 
-// Connect connects to MySQL database using given credentials.
-//
-// If connection is successful, it returns true.
-// If connection is unsuccessful, it returns false and error.
-//
-// The connection is closed after the function returns.
-func (c *MySQLClient) Connect(host string, port int, username, password string) (bool, error) {
-	return connect(host, port, username, password, "INFORMATION_SCHEMA")
-}
-
 // IsMySQL checks if the given host is running MySQL database.
 //
 // If the host is running MySQL database, it returns true.
@@ -58,83 +47,96 @@ func (c *MySQLClient) IsMySQL(host string, port int) (bool, error) {
 	return true, nil
 }
 
-// ConnectWithDB connects to MySQL database using given credentials and database name.
+// Connect connects to MySQL database using given credentials.
 //
 // If connection is successful, it returns true.
 // If connection is unsuccessful, it returns false and error.
-//
 // The connection is closed after the function returns.
-func (c *MySQLClient) ConnectWithDB(host string, port int, username, password, dbName string) (bool, error) {
-	return connect(host, port, username, password, dbName)
+func (c *MySQLClient) Connect(host string, port int, username, password string) (bool, error) {
+	if !protocolstate.IsHostAllowed(host) {
+		// host is not valid according to network policy
+		return false, protocolstate.ErrHostDenied.Msgf(host)
+	}
+	dsn, err := BuildDSN(MySQLOptions{
+		Host:     host,
+		Port:     port,
+		DbName:   "INFORMATION_SCHEMA",
+		Protocol: "tcp",
+		Username: username,
+		Password: password,
+	})
+	if err != nil {
+		return false, err
+	}
+	return connectWithDSN(dsn)
+}
+
+type MySQLInfo struct {
+	Host      string               `json:"host,omitempty"`
+	IP        string               `json:"ip"`
+	Port      int                  `json:"port"`
+	Protocol  string               `json:"protocol"`
+	TLS       bool                 `json:"tls"`
+	Transport string               `json:"transport"`
+	Version   string               `json:"version,omitempty"`
+	Debug     plugins.ServiceMySQL `json:"debug,omitempty"`
+	Raw       string               `json:"metadata"`
+}
+
+// returns MySQLInfo when fingerpint is successful
+func (c *MySQLClient) FingerprintMySQL(host string, port int) (MySQLInfo, error) {
+	info := MySQLInfo{}
+	if !protocolstate.IsHostAllowed(host) {
+		// host is not valid according to network policy
+		return info, protocolstate.ErrHostDenied.Msgf(host)
+	}
+	conn, err := protocolstate.Dialer.Dial(context.TODO(), "tcp", net.JoinHostPort(host, fmt.Sprintf("%d", port)))
+	if err != nil {
+		return info, err
+	}
+	defer conn.Close()
+
+	plugin := &mysqlplugin.MYSQLPlugin{}
+	service, err := plugin.Run(conn, 5*time.Second, plugins.Target{Host: host})
+	if err != nil {
+		return info, err
+	}
+	if service == nil {
+		return info, fmt.Errorf("something went wrong got null output")
+	}
+	// fill all fields
+	info.Host = service.Host
+	info.IP = service.IP
+	info.Port = service.Port
+	info.Protocol = service.Protocol
+	info.TLS = service.TLS
+	info.Transport = service.Transport
+	info.Version = service.Version
+	info.Debug = service.Metadata().(plugins.ServiceMySQL)
+	bin, _ := service.Raw.MarshalJSON()
+	info.Raw = string(bin)
+	return info, nil
 }
 
 // ConnectWithDSN connects to MySQL database using given DSN.
 // we override mysql dialer with fastdialer so it respects network policy
 func (c *MySQLClient) ConnectWithDSN(dsn string) (bool, error) {
+	return connectWithDSN(dsn)
+}
+
+func (c *MySQLClient) ExecuteQueryWithOpts(opts MySQLOptions, query string) (*utils.SQLResult, error) {
+	if !protocolstate.IsHostAllowed(opts.Host) {
+		// host is not valid according to network policy
+		return nil, protocolstate.ErrHostDenied.Msgf(opts.Host)
+	}
+	dsn, err := BuildDSN(opts)
+	if err != nil {
+		return nil, err
+	}
+
 	db, err := sql.Open("mysql", dsn)
 	if err != nil {
-		return false, err
-	}
-	defer db.Close()
-	db.SetMaxOpenConns(1)
-	db.SetMaxIdleConns(0)
-
-	_, err = db.Exec("select 1")
-	if err != nil {
-		return false, err
-	}
-	return true, nil
-}
-
-func connect(host string, port int, username, password, dbName string) (bool, error) {
-	if host == "" || port <= 0 {
-		return false, fmt.Errorf("invalid host or port")
-	}
-
-	if !protocolstate.IsHostAllowed(host) {
-		// host is not valid according to network policy
-		return false, protocolstate.ErrHostDenied.Msgf(host)
-	}
-
-	target := net.JoinHostPort(host, fmt.Sprintf("%d", port))
-
-	db, err := sql.Open("mysql", fmt.Sprintf("%v:%v@tcp(%v)/%s?allowOldPasswords=1",
-		url.PathEscape(username),
-		url.PathEscape(password),
-		target,
-		dbName))
-	if err != nil {
-		return false, err
-	}
-	defer db.Close()
-	db.SetMaxOpenConns(1)
-	db.SetMaxIdleConns(0)
-
-	_, err = db.Exec("select 1")
-	if err != nil {
-		return false, err
-	}
-	return true, nil
-}
-
-// ExecuteQuery connects to Mysql database using given credentials and database name.
-// and executes a query on the db.
-func (c *MySQLClient) ExecuteQuery(host string, port int, username, password, dbName, query string) (string, error) {
-
-	if !protocolstate.IsHostAllowed(host) {
-		// host is not valid according to network policy
-		return "", protocolstate.ErrHostDenied.Msgf(host)
-	}
-
-	target := net.JoinHostPort(host, fmt.Sprintf("%d", port))
-
-	db, err := sql.Open("mysql", fmt.Sprintf("%v:%v@tcp(%v)/%s",
-		url.PathEscape(username),
-		url.PathEscape(password),
-		target,
-		dbName))
-	if err != nil {
-		return "", err
+		return nil, err
 	}
 	defer db.Close()
 	db.SetMaxOpenConns(1)
@@ -142,13 +144,43 @@ func (c *MySQLClient) ExecuteQuery(host string, port int, username, password, db
 
 	rows, err := db.Query(query)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
-	resp, err := utils.UnmarshalSQLRows(rows)
+
+	data, err := utils.UnmarshalSQLRows(rows)
 	if err != nil {
-		return "", err
+		if len(data.Rows) > 0 {
+			// allow partial results
+			return data, nil
 		}
-	return string(resp), nil
+		return nil, err
+	}
+	return data, nil
+}
+
+// ExecuteQuery connects to Mysql database using given credentials
+// and executes a query on the db.
+func (c *MySQLClient) ExecuteQuery(host string, port int, username, password, query string) (*utils.SQLResult, error) {
+	return c.ExecuteQueryWithOpts(MySQLOptions{
+		Host:     host,
+		Port:     port,
+		Protocol: "tcp",
+		Username: username,
+		Password: password,
+	}, query)
+}
+
+// ExecuteQuery connects to Mysql database using given credentials
+// and executes a query on the db.
+func (c *MySQLClient) ExecuteQueryOnDB(host string, port int, username, password, dbname, query string) (*utils.SQLResult, error) {
+	return c.ExecuteQueryWithOpts(MySQLOptions{
+		Host:     host,
+		Port:     port,
+		Protocol: "tcp",
+		Username: username,
+		Password: password,
+		DbName:   dbname,
+	}, query)
 }
 
 func init() {

pkg/js/libs/mysql/mysql_private.go

@@ -0,0 +1,65 @@
+package mysql
+
+import (
+	"database/sql"
+	"fmt"
+	"net"
+	"net/url"
+	"strings"
+)
+
+// MySQLOptions defines the data source name (DSN) options required to connect to a MySQL database.
+// along with other options like Timeout etc
+type MySQLOptions struct {
+	Host     string // Host is the host name or IP address of the MySQL server.
+	Port     int    // Port is the port number on which the MySQL server is listening.
+	Protocol string // Protocol is the protocol used to connect to the MySQL server (ex: "tcp").
+	Username string // Username is the user name used to authenticate with the MySQL server.
+	Password string // Password is the password used to authenticate with the MySQL server.
+	DbName   string // DbName is the name of the database to connect to on the MySQL server.
+	RawQuery string // QueryStr is the query string to append to the DSN (ex: "?tls=skip-verify").
+	Timeout  int    // Timeout is the timeout in seconds for the connection to the MySQL server.
+}
+
+// BuildDSN builds a MySQL data source name (DSN) from the given options.
+func BuildDSN(opts MySQLOptions) (string, error) {
+	if opts.Host == "" || opts.Port <= 0 {
+		return "", fmt.Errorf("invalid host or port")
+	}
+	if opts.Protocol == "" {
+		opts.Protocol = "tcp"
+	}
+	if opts.DbName == "" {
+		opts.DbName = "/"
+	} else {
+		opts.DbName = "/" + opts.DbName
+	}
+	target := net.JoinHostPort(opts.Host, fmt.Sprintf("%d", opts.Port))
+	var dsn strings.Builder
+	dsn.WriteString(fmt.Sprintf("%v:%v", url.QueryEscape(opts.Username), url.QueryEscape(opts.Password)))
+	dsn.WriteString("@")
+	dsn.WriteString(fmt.Sprintf("%v(%v)", opts.Protocol, target))
+	if opts.DbName != "" {
+		dsn.WriteString(opts.DbName)
+	}
+	if opts.RawQuery != "" {
+		dsn.WriteString(opts.RawQuery)
+	}
+	return dsn.String(), nil
+}
+
+func connectWithDSN(dsn string) (bool, error) {
+	db, err := sql.Open("mysql", dsn)
+	if err != nil {
+		return false, err
+	}
+	defer db.Close()
+	db.SetMaxOpenConns(1)
+	db.SetMaxIdleConns(0)
+
+	_, err = db.Exec("select 1")
+	if err != nil {
+		return false, err
+	}
+	return true, nil
+}

pkg/js/libs/postgres/postgres.go

@@ -59,11 +59,10 @@ func (c *PGClient) Connect(host string, port int, username, password string) (bo
 
 // ExecuteQuery connects to Postgres database using given credentials and database name.
 // and executes a query on the db.
-func (c *PGClient) ExecuteQuery(host string, port int, username, password, dbName, query string) (string, error) {
-
+func (c *PGClient) ExecuteQuery(host string, port int, username, password, dbName, query string) (*utils.SQLResult, error) {
 	if !protocolstate.IsHostAllowed(host) {
 		// host is not valid according to network policy
-		return "", protocolstate.ErrHostDenied.Msgf(host)
+		return nil, protocolstate.ErrHostDenied.Msgf(host)
 	}
 
 	target := net.JoinHostPort(host, fmt.Sprintf("%d", port))
@@ -71,18 +70,18 @@ func (c *PGClient) ExecuteQuery(host string, port int, username, password, dbNam
 	connStr := fmt.Sprintf("postgres://%s:%s@%s/%s?sslmode=disable", username, password, target, dbName)
 	db, err := sql.Open("postgres", connStr)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 
 	rows, err := db.Query(query)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 	resp, err := utils.UnmarshalSQLRows(rows)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
-	return string(resp), nil
+	return resp, nil
 }
 
 // ConnectWithDB connects to Postgres database using given credentials and database name.

pkg/js/utils/util.go

@@ -2,29 +2,41 @@ package utils
 
 import (
 	"database/sql"
-
-	jsoniter "github.com/json-iterator/go"
 )
 
-// UnmarshalSQLRows unmarshals sql rows to json
+// SQLResult holds the result of a SQL query.
 //
-// This function provides a way to unmarshal arbitrary sql rows
-// to json.
-func UnmarshalSQLRows(rows *sql.Rows) ([]byte, error) {
+// It contains the count of rows, the columns present, and the actual row data.
+type SQLResult struct {
+	Count   int           // Count is the number of rows returned.
+	Columns []string      // Columns is the slice of column names.
+	Rows    []interface{} // Rows is a slice of row data, where each row is a map of column name to value.
+}
+
+// UnmarshalSQLRows converts sql.Rows into a more structured SQLResult.
+//
+// This function takes *sql.Rows as input and attempts to unmarshal the data into
+// a SQLResult struct. It handles different SQL data types by using the appropriate
+// sql.Null* types during scanning. It returns a pointer to a SQLResult or an error.
+//
+// The function closes the sql.Rows when finished.
+func UnmarshalSQLRows(rows *sql.Rows) (*SQLResult, error) {
+	defer rows.Close()
 	columnTypes, err := rows.ColumnTypes()
 	if err != nil {
 		return nil, err
 	}
+	result := &SQLResult{}
+	result.Columns, err = rows.Columns()
+	if err != nil {
+		return nil, err
+	}
 
 	count := len(columnTypes)
-	finalRows := []interface{}{}
-
 	for rows.Next() {
-
+		result.Count++
 		scanArgs := make([]interface{}, count)
-
 		for i, v := range columnTypes {
-
 			switch v.DatabaseTypeName() {
 			case "VARCHAR", "TEXT", "UUID", "TIMESTAMP":
 				scanArgs[i] = new(sql.NullString)
@@ -36,17 +48,13 @@ func UnmarshalSQLRows(rows *sql.Rows) ([]byte, error) {
 				scanArgs[i] = new(sql.NullString)
 			}
 		}
-
 		err := rows.Scan(scanArgs...)
-
 		if err != nil {
-			return nil, err
+			// Return the result accumulated so far along with the error.
+			return result, err
 		}
-
-		masterData := map[string]interface{}{}
-
+		masterData := make(map[string]interface{})
 		for i, v := range columnTypes {
-
 			if z, ok := (scanArgs[i]).(*sql.NullBool); ok {
 				masterData[v.Name()] = z.Bool
 				continue
@@ -74,8 +82,7 @@ func UnmarshalSQLRows(rows *sql.Rows) ([]byte, error) {
 
 			masterData[v.Name()] = scanArgs[i]
 		}
-
-		finalRows = append(finalRows, masterData)
+		result.Rows = append(result.Rows, masterData)
 	}
-	return jsoniter.Marshal(finalRows)
+	return result, nil
 }

pkg/protocols/javascript/js.go

@@ -151,6 +151,7 @@ func (request *Request) Compile(options *protocols.ExecutorOptions) error {
 
 		opts := &compiler.ExecuteOptions{
 			Timeout: request.Timeout,
+			Source:  &request.Init,
 		}
 		// register 'export' function to export variables from init code
 		// these are saved in args and are available in pre-condition and request code
@@ -212,7 +213,7 @@ func (request *Request) Compile(options *protocols.ExecutorOptions) error {
 		// proceed with whatever args we have
 		args.Args, _ = request.evaluateArgs(allVars, options, true)
 
-		initCompiled, err := goja.Compile("", request.Init, false)
+		initCompiled, err := compiler.WrapScriptNCompile(request.Init, false)
 		if err != nil {
 			return errorutil.NewWithTag(request.TemplateID, "could not compile init code: %s", err)
 		}
@@ -233,7 +234,7 @@ func (request *Request) Compile(options *protocols.ExecutorOptions) error {
 
 	// compile pre-condition if any
 	if request.PreCondition != "" {
-		preConditionCompiled, err := goja.Compile("", request.PreCondition, false)
+		preConditionCompiled, err := compiler.WrapScriptNCompile(request.PreCondition, false)
 		if err != nil {
 			return errorutil.NewWithTag(request.TemplateID, "could not compile pre-condition: %s", err)
 		}
@@ -242,7 +243,7 @@ func (request *Request) Compile(options *protocols.ExecutorOptions) error {
 
 	// compile actual source code
 	if request.Code != "" {
-		scriptCompiled, err := goja.Compile("", request.Code, false)
+		scriptCompiled, err := compiler.WrapScriptNCompile(request.Code, false)
 		if err != nil {
 			return errorutil.NewWithTag(request.TemplateID, "could not compile javascript code: %s", err)
 		}
@@ -339,7 +340,8 @@ func (request *Request) ExecuteWithResults(target *contextargs.Context, dynamicV
 		}
 		argsCopy.TemplateCtx = templateCtx.GetAll()
 
-		result, err := request.options.JsCompiler.ExecuteWithOptions(request.preConditionCompiled, argsCopy, &compiler.ExecuteOptions{Timeout: request.Timeout})
+		result, err := request.options.JsCompiler.ExecuteWithOptions(request.preConditionCompiled, argsCopy,
+			&compiler.ExecuteOptions{Timeout: request.Timeout, Source: &request.PreCondition})
 		if err != nil {
 			return errorutil.NewWithTag(request.TemplateID, "could not execute pre-condition: %s", err)
 		}
@@ -471,7 +473,8 @@ func (request *Request) executeRequestWithPayloads(hostPort string, input *conte
 		}
 	}
 
-	results, err := request.options.JsCompiler.ExecuteWithOptions(request.scriptCompiled, argsCopy, &compiler.ExecuteOptions{Timeout: request.Timeout})
+	results, err := request.options.JsCompiler.ExecuteWithOptions(request.scriptCompiled, argsCopy,
+		&compiler.ExecuteOptions{Timeout: request.Timeout, Source: &request.Code})
 	if err != nil {
 		// shouldn't fail even if it returned error instead create a failure event
 		results = compiler.ExecuteResult{"success": false, "error": err.Error()}

pkg/tmplexec/exec.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/dop251/goja"
 	"github.com/projectdiscovery/gologger"
+	"github.com/projectdiscovery/nuclei/v3/pkg/js/compiler"
 	"github.com/projectdiscovery/nuclei/v3/pkg/operators/common/dsl"
 	"github.com/projectdiscovery/nuclei/v3/pkg/output"
 	"github.com/projectdiscovery/nuclei/v3/pkg/protocols"
@@ -48,7 +49,7 @@ func NewTemplateExecuter(requests []protocols.Request, options *protocols.Execut
 		// we use a dummy input here because goal of flow executor at this point is to just check
 		// syntax and other things are correct before proceeding to actual execution
 		// during execution new instance of flow will be created as it is tightly coupled with lot of executor options
-		p, err := goja.Compile("flow.js", options.Flow, false)
+		p, err := compiler.WrapScriptNCompile(options.Flow, false)
 		if err != nil {
 			return nil, fmt.Errorf("could not compile flow: %s", err)
 		}