Fix: calling URLs with curl

Calling URLs via curl results in the error: “Command blocked by safety guard (path outside working dir)”. This commit fixes the problem.

My changes to guardCommand ensure that the command is split into its individual parts (command + options/flags + arguments) and that each part is checked individually. In addition, web URLs are excluded from the check.

pkg/tools/shell.go

@@ -5,11 +5,13 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"net/url"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"regexp"
 	"runtime"
+	"strconv"
 	"strings"
 	"time"
 
@@ -75,6 +77,9 @@ var (
 
 	// absolutePathPattern matches absolute file paths in commands (Unix and Windows).
 	absolutePathPattern = regexp.MustCompile(`[A-Za-z]:\\[^\\\"']+|/[^\s\"']+`)
+
+	// split command in command + options/flags + arguments
+	splitPattern = regexp.MustCompile(`("[^"]*"|'[^']*'|[\S]+)+`)
 )
 
 func NewExecTool(workingDir string, restrict bool) (*ExecTool, error) {
@@ -286,30 +291,48 @@ func (t *ExecTool) guardCommand(command, cwd string) string {
 	}
 
 	if t.restrictToWorkspace {
-		if strings.Contains(cmd, "..\\") || strings.Contains(cmd, "../") {
-			return "Command blocked by safety guard (path traversal detected)"
-		}
 
 		cwdPath, err := filepath.Abs(cwd)
 		if err != nil {
-			return ""
+			cwdPath = ""
 		}
 
-		matches := absolutePathPattern.FindAllString(cmd, -1)
-
-		for _, raw := range matches {
-			p, err := filepath.Abs(raw)
+		parts := splitPattern.FindAllString(cmd, -1)
+		for _, part := range parts {
+			unquoted, err := strconv.Unquote(part)
 			if err != nil {
+				unquoted = part
+			}
+
+			u, err := url.ParseRequestURI(unquoted)
+			if err == nil && u.Scheme != "" && u.Host != "" {
 				continue
 			}
 
-			rel, err := filepath.Rel(cwdPath, p)
-			if err != nil {
+			if strings.Contains(part, "..\\") || strings.Contains(part, "../") {
+				return "Command blocked by safety guard (path traversal detected)"
+			}
+
+			if cwdPath == "" {
 				continue
 			}
 
-			if strings.HasPrefix(rel, "..") {
-				return "Command blocked by safety guard (path outside working dir)"
+			matches := absolutePathPattern.FindAllString(part, -1)
+
+			for _, raw := range matches {
+				p, err := filepath.Abs(raw)
+				if err != nil {
+					continue
+				}
+
+				rel, err := filepath.Rel(cwdPath, p)
+				if err != nil {
+					continue
+				}
+
+				if strings.HasPrefix(rel, "..") {
+					return "Command blocked by safety guard (path outside working dir)"
+				}
 			}
 		}
 	}