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fix(pkg):do regex precompile insteadd on the fly (#911)

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* fix(pkg/providers):do regex precompile insteadd on the fly

* fix(providers): replace HTTP-specific regex with standalone status code matcher

The precompiled HTTP regex used uppercase "HTTP" which never matched
because ClassifyError lowercases the input. Replace it with a
case-insensitive word-boundary pattern that matches any standalone
3-digit status code (300-599), which also subsumes the HTTP/x.x case.

Add test case for standalone status code extraction.

* fix(providers): restore http regex and add standalone status code matcher

Restore the http-prefixed regex (without unnecessary (?i) flag since
input is already lowercased by ClassifyError) as a mid-priority pattern
to reduce false positives. Add a standalone word-boundary matcher as a
fallback for bare status codes like "429". Fix test to use lowercased
input matching the actual calling convention.

* perf(tools): move path regex compilation from per-call to package init

The path regex in guardCommand was compiled on every call. Hoist it
to a package-level var (absolutePathPattern) alongside defaultDenyPatterns
in a single var block, so it is compiled once at init time.

* style(tools): move inline comment to fix golines formatting error
This commit is contained in:
Tong Niu
2026-03-01 23:06:31 +11:00
committed by GitHub
parent 71bdeb41c9
commit d6e88da8ba
3 changed files with 64 additions and 56 deletions
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pkg/tools/shell.go
+53 -46
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@@ -24,50 +24,58 @@ type ExecTool struct {
restrictToWorkspace bool
}
var defaultDenyPatterns = []*regexp.Regexp{
regexp.MustCompile(`\brm\s+-[rf]{1,2}\b`),
regexp.MustCompile(`\bdel\s+/[fq]\b`),
regexp.MustCompile(`\brmdir\s+/s\b`),
regexp.MustCompile(`\b(format|mkfs|diskpart)\b\s`), // Match disk wiping commands (must be followed by space/args)
regexp.MustCompile(`\bdd\s+if=`),
regexp.MustCompile(`>\s*/dev/sd[a-z]\b`), // Block writes to disk devices (but allow /dev/null)
regexp.MustCompile(`\b(shutdown|reboot|poweroff)\b`),
regexp.MustCompile(`:\(\)\s*\{.*\};\s*:`),
regexp.MustCompile(`\$\([^)]+\)`),
regexp.MustCompile(`\$\{[^}]+\}`),
regexp.MustCompile("`[^`]+`"),
regexp.MustCompile(`\|\s*sh\b`),
regexp.MustCompile(`\|\s*bash\b`),
regexp.MustCompile(`;\s*rm\s+-[rf]`),
regexp.MustCompile(`&&\s*rm\s+-[rf]`),
regexp.MustCompile(`\|\|\s*rm\s+-[rf]`),
regexp.MustCompile(`>\s*/dev/null\s*>&?\s*\d?`),
regexp.MustCompile(`<<\s*EOF`),
regexp.MustCompile(`\$\(\s*cat\s+`),
regexp.MustCompile(`\$\(\s*curl\s+`),
regexp.MustCompile(`\$\(\s*wget\s+`),
regexp.MustCompile(`\$\(\s*which\s+`),
regexp.MustCompile(`\bsudo\b`),
regexp.MustCompile(`\bchmod\s+[0-7]{3,4}\b`),
regexp.MustCompile(`\bchown\b`),
regexp.MustCompile(`\bpkill\b`),
regexp.MustCompile(`\bkillall\b`),
regexp.MustCompile(`\bkill\s+-[9]\b`),
regexp.MustCompile(`\bcurl\b.*\|\s*(sh|bash)`),
regexp.MustCompile(`\bwget\b.*\|\s*(sh|bash)`),
regexp.MustCompile(`\bnpm\s+install\s+-g\b`),
regexp.MustCompile(`\bpip\s+install\s+--user\b`),
regexp.MustCompile(`\bapt\s+(install|remove|purge)\b`),
regexp.MustCompile(`\byum\s+(install|remove)\b`),
regexp.MustCompile(`\bdnf\s+(install|remove)\b`),
regexp.MustCompile(`\bdocker\s+run\b`),
regexp.MustCompile(`\bdocker\s+exec\b`),
regexp.MustCompile(`\bgit\s+push\b`),
regexp.MustCompile(`\bgit\s+force\b`),
regexp.MustCompile(`\bssh\b.*@`),
regexp.MustCompile(`\beval\b`),
regexp.MustCompile(`\bsource\s+.*\.sh\b`),
}
var (
defaultDenyPatterns = []*regexp.Regexp{
regexp.MustCompile(`\brm\s+-[rf]{1,2}\b`),
regexp.MustCompile(`\bdel\s+/[fq]\b`),
regexp.MustCompile(`\brmdir\s+/s\b`),
// Match disk wiping commands (must be followed by space/args)
regexp.MustCompile(
`\b(format|mkfs|diskpart)\b\s`,
),
regexp.MustCompile(`\bdd\s+if=`),
regexp.MustCompile(`>\s*/dev/sd[a-z]\b`), // Block writes to disk devices (but allow /dev/null)
regexp.MustCompile(`\b(shutdown|reboot|poweroff)\b`),
regexp.MustCompile(`:\(\)\s*\{.*\};\s*:`),
regexp.MustCompile(`\$\([^)]+\)`),
regexp.MustCompile(`\$\{[^}]+\}`),
regexp.MustCompile("`[^`]+`"),
regexp.MustCompile(`\|\s*sh\b`),
regexp.MustCompile(`\|\s*bash\b`),
regexp.MustCompile(`;\s*rm\s+-[rf]`),
regexp.MustCompile(`&&\s*rm\s+-[rf]`),
regexp.MustCompile(`\|\|\s*rm\s+-[rf]`),
regexp.MustCompile(`>\s*/dev/null\s*>&?\s*\d?`),
regexp.MustCompile(`<<\s*EOF`),
regexp.MustCompile(`\$\(\s*cat\s+`),
regexp.MustCompile(`\$\(\s*curl\s+`),
regexp.MustCompile(`\$\(\s*wget\s+`),
regexp.MustCompile(`\$\(\s*which\s+`),
regexp.MustCompile(`\bsudo\b`),
regexp.MustCompile(`\bchmod\s+[0-7]{3,4}\b`),
regexp.MustCompile(`\bchown\b`),
regexp.MustCompile(`\bpkill\b`),
regexp.MustCompile(`\bkillall\b`),
regexp.MustCompile(`\bkill\s+-[9]\b`),
regexp.MustCompile(`\bcurl\b.*\|\s*(sh|bash)`),
regexp.MustCompile(`\bwget\b.*\|\s*(sh|bash)`),
regexp.MustCompile(`\bnpm\s+install\s+-g\b`),
regexp.MustCompile(`\bpip\s+install\s+--user\b`),
regexp.MustCompile(`\bapt\s+(install|remove|purge)\b`),
regexp.MustCompile(`\byum\s+(install|remove)\b`),
regexp.MustCompile(`\bdnf\s+(install|remove)\b`),
regexp.MustCompile(`\bdocker\s+run\b`),
regexp.MustCompile(`\bdocker\s+exec\b`),
regexp.MustCompile(`\bgit\s+push\b`),
regexp.MustCompile(`\bgit\s+force\b`),
regexp.MustCompile(`\bssh\b.*@`),
regexp.MustCompile(`\beval\b`),
regexp.MustCompile(`\bsource\s+.*\.sh\b`),
}
// absolutePathPattern matches absolute file paths in commands (Unix and Windows).
absolutePathPattern = regexp.MustCompile(`[A-Za-z]:\\[^\\\"']+|/[^\s\"']+`)
)
func NewExecTool(workingDir string, restrict bool) (*ExecTool, error) {
return NewExecToolWithConfig(workingDir, restrict, nil)
@@ -287,8 +295,7 @@ func (t *ExecTool) guardCommand(command, cwd string) string {
return ""
}
pathPattern := regexp.MustCompile(`[A-Za-z]:\\[^\\\"']+|/[^\s\"']+`)
matches := pathPattern.FindAllString(cmd, -1)
matches := absolutePathPattern.FindAllString(cmd, -1)
for _, raw := range matches {
p, err := filepath.Abs(raw)