-- main.go --
package main

import (
	"fmt"
	"net/url"
	"os"
	"path/filepath"
)

func main() {
	u, err := url.Parse(os.Args[1])
	if err != nil {
		panic(err)
	}
	body, err := url.PathUnescape(u.Query().Get("body"))
	if err != nil {
		panic(err)
	}
	out := filepath.Join(os.TempDir(), "browser")
	f, err := os.Create(out)
	if err != nil {
		panic(err)
	}
	fmt.Fprintln(f, body)

	// Valid Go identifier.
	for i, c := range s {
		if !unicode.IsLetter(c) && c != '_' && (i == 0 || !unicode.IsDigit(c)) {
			return false
		}
	}
	return true
}

func pathUnescape(path string) string {
	u, err := url.PathUnescape(path)
	if err != nil {
		// Invalidly escaped path; use the original
		return path
	}
	return u
}

// relationship is a relationship between two patterns, p1 and p2.

	if c := n.multiChild; c != nil {
		// Don't record a match for a nameless wildcard (which arises from a
		// trailing slash in the pattern).
		if c.pattern.lastSegment().s != "" {
			matches = append(matches, pathUnescape(path[1:])) // remove initial slash
		}
		return c, matches
	}
	return nil, nil
}

// firstSegment splits path into its first segment, and the rest.
// The path must begin with "/".

	for _, tt := range pathEscapeTests {
		actual := PathEscape(tt.in)
		if tt.out != actual {
			t.Errorf("PathEscape(%q) = %q, want %q", tt.in, actual, tt.out)
		}

		// for bonus points, verify that escape:unescape is an identity.
		roundtrip, err := PathUnescape(actual)
		if roundtrip != tt.in || err != nil {
			t.Errorf("PathUnescape(%q) = %q, %s; want %q, %s", actual, roundtrip, err, tt.in, "[no error]")

			if len(headerValue) > 0 {
				ret = append(ret, headerValue)
			}
		}
	}
	return ret
}

func unescapeExtraKey(encodedKey string) string {
	key, err := url.PathUnescape(encodedKey) // Decode %-encoded bytes.
	if err != nil {
		return encodedKey // Always record extra strings, even if malformed/unencoded.
	}
	return key
}

	}
	var percentEncodedCases []expect
	for i := 1; i <= 0xff; i++ {
		input := fmt.Sprintf("/admin%%%.2x", i)
		output := input
		if supportedPercentEncode(i) {
			var err error
			output, err = url.PathUnescape(input)
			switch i {
			case 0x5c:
				output = strings.ReplaceAll(output, `\`, `/`)
			case 0x7e:
				output = strings.ReplaceAll(output, `%7e`, `~`)
			}
			if err != nil {

	"fmt"
	"log"
	"net/url"
	"strings"
)

func ExamplePathEscape() {
	path := url.PathEscape("my/cool+blog&about,stuff")
	fmt.Println(path)

	// Output:
	// my%2Fcool+blog&about%2Cstuff
}

func ExamplePathUnescape() {
	escapedPath := "my%2Fcool+blog&about%2Cstuff"
	path, err := url.PathUnescape(escapedPath)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(path)

	// Output:

			ep = path.Clean(ep)
			ep += slashSeparator
		} else {
			ep = path.Clean(ep)
		}
		ep = ep[1:]
	}
	return ep
}

// unescapeGeneric is similar to url.PathUnescape or url.QueryUnescape
// depending on input, additionally also handles situations such as
// `//` are normalized as `/`, also removes any `/` prefix before
// returning.

		b.WriteString("[")
		b.WriteString(strings.Join(groups, ","))
		b.WriteString("]")
	}
	return b.String()
}

func unescapeExtraKey(encodedKey string) string {
	key, err := url.PathUnescape(encodedKey) // Decode %-encoded bytes.
	if err != nil {
		return encodedKey // Always record extra strings, even if malformed/unencoded.
	}
	return key
}

}

// PathUnescape does the inverse transformation of [PathEscape],
// converting each 3-byte encoded substring of the form "%AB" into the
// hex-decoded byte 0xAB. It returns an error if any % is not followed
// by two hexadecimal digits.
//
// PathUnescape is identical to [QueryUnescape] except that it does not
// unescape '+' to ' ' (space).
func PathUnescape(s string) (string, error) {