Method splitPos

modules/caddyhttp/reverseproxy/fastcgi/fastcgi.go:433–478

splitPos returns the index where path should be split based on t.SplitPath. example: if splitPath is [".php"] "/path/to/script.php/some/path": ("/path/to/script.php", "/some/path") Matching is strictly ASCII case-insensitive. Bytes >= utf8.RuneSelf in path never match any split entry: split string

(path string)

//
// Adapted from FrankenPHP's code (copyright 2026 Kévin Dunglas, MIT license)
func (t Transport) splitPos(path string) int {
	// TODO: from v1...
	// if httpserver.CaseSensitivePath {
	// 	return strings.Index(path, r.SplitPath)
	// }
	if len(t.SplitPath) == 0 {
		return 0
	}

	pathLen := len(path)

	for _, split := range t.SplitPath {
		splitLen := len(split)
		if splitLen == 0 || splitLen > pathLen {
			continue
		}

		for i := 0; i <= pathLen-splitLen; i++ {
			match := true
			for j := range splitLen {
				c := path[i+j]
				if c >= utf8.RuneSelf {
					match = false

					break
				}

				if 'A' <= c && c <= 'Z' {
					c += 'a' - 'A'
				}

				if c != split[j] {
					match = false

					break
				}
			}

			if match {
				return i + splitLen
			}
		}
	}

	return -1
}

type envVars map[string]string