+++ /dev/null
-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:generate go run gen.go
-
-// Package publicsuffix provides a public suffix list based on data from
-// http://publicsuffix.org/. A public suffix is one under which Internet users
-// can directly register names.
-package publicsuffix // import "golang.org/x/net/publicsuffix"
-
-// TODO: specify case sensitivity and leading/trailing dot behavior for
-// func PublicSuffix and func EffectiveTLDPlusOne.
-
-import (
- "fmt"
- "net/http/cookiejar"
- "strings"
-)
-
-// List implements the cookiejar.PublicSuffixList interface by calling the
-// PublicSuffix function.
-var List cookiejar.PublicSuffixList = list{}
-
-type list struct{}
-
-func (list) PublicSuffix(domain string) string {
- ps, _ := PublicSuffix(domain)
- return ps
-}
-
-func (list) String() string {
- return version
-}
-
-// PublicSuffix returns the public suffix of the domain using a copy of the
-// publicsuffix.org database compiled into the library.
-//
-// icann is whether the public suffix is managed by the Internet Corporation
-// for Assigned Names and Numbers. If not, the public suffix is privately
-// managed. For example, foo.org and foo.co.uk are ICANN domains,
-// foo.dyndns.org and foo.blogspot.co.uk are private domains.
-//
-// Use cases for distinguishing ICANN domains like foo.com from private
-// domains like foo.appspot.com can be found at
-// https://wiki.mozilla.org/Public_Suffix_List/Use_Cases
-func PublicSuffix(domain string) (publicSuffix string, icann bool) {
- lo, hi := uint32(0), uint32(numTLD)
- s, suffix, wildcard := domain, len(domain), false
-loop:
- for {
- dot := strings.LastIndex(s, ".")
- if wildcard {
- suffix = 1 + dot
- }
- if lo == hi {
- break
- }
- f := find(s[1+dot:], lo, hi)
- if f == notFound {
- break
- }
-
- u := nodes[f] >> (nodesBitsTextOffset + nodesBitsTextLength)
- icann = u&(1<<nodesBitsICANN-1) != 0
- u >>= nodesBitsICANN
- u = children[u&(1<<nodesBitsChildren-1)]
- lo = u & (1<<childrenBitsLo - 1)
- u >>= childrenBitsLo
- hi = u & (1<<childrenBitsHi - 1)
- u >>= childrenBitsHi
- switch u & (1<<childrenBitsNodeType - 1) {
- case nodeTypeNormal:
- suffix = 1 + dot
- case nodeTypeException:
- suffix = 1 + len(s)
- break loop
- }
- u >>= childrenBitsNodeType
- wildcard = u&(1<<childrenBitsWildcard-1) != 0
-
- if dot == -1 {
- break
- }
- s = s[:dot]
- }
- if suffix == len(domain) {
- // If no rules match, the prevailing rule is "*".
- return domain[1+strings.LastIndex(domain, "."):], icann
- }
- return domain[suffix:], icann
-}
-
-const notFound uint32 = 1<<32 - 1
-
-// find returns the index of the node in the range [lo, hi) whose label equals
-// label, or notFound if there is no such node. The range is assumed to be in
-// strictly increasing node label order.
-func find(label string, lo, hi uint32) uint32 {
- for lo < hi {
- mid := lo + (hi-lo)/2
- s := nodeLabel(mid)
- if s < label {
- lo = mid + 1
- } else if s == label {
- return mid
- } else {
- hi = mid
- }
- }
- return notFound
-}
-
-// nodeLabel returns the label for the i'th node.
-func nodeLabel(i uint32) string {
- x := nodes[i]
- length := x & (1<<nodesBitsTextLength - 1)
- x >>= nodesBitsTextLength
- offset := x & (1<<nodesBitsTextOffset - 1)
- return text[offset : offset+length]
-}
-
-// EffectiveTLDPlusOne returns the effective top level domain plus one more
-// label. For example, the eTLD+1 for "foo.bar.golang.org" is "golang.org".
-func EffectiveTLDPlusOne(domain string) (string, error) {
- suffix, _ := PublicSuffix(domain)
- if len(domain) <= len(suffix) {
- return "", fmt.Errorf("publicsuffix: cannot derive eTLD+1 for domain %q", domain)
- }
- i := len(domain) - len(suffix) - 1
- if domain[i] != '.' {
- return "", fmt.Errorf("publicsuffix: invalid public suffix %q for domain %q", suffix, domain)
- }
- return domain[1+strings.LastIndex(domain[:i], "."):], nil
-}
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