diff options
Diffstat (limited to 'vendor/github.com/PuerkitoBio/urlesc/urlesc.go')
| -rw-r--r-- | vendor/github.com/PuerkitoBio/urlesc/urlesc.go | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/vendor/github.com/PuerkitoBio/urlesc/urlesc.go b/vendor/github.com/PuerkitoBio/urlesc/urlesc.go deleted file mode 100644 index 1b84624..0000000 --- a/vendor/github.com/PuerkitoBio/urlesc/urlesc.go +++ /dev/null @@ -1,180 +0,0 @@ -// Copyright 2009 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. - -// Package urlesc implements query escaping as per RFC 3986. -// It contains some parts of the net/url package, modified so as to allow -// some reserved characters incorrectly escaped by net/url. -// See https://github.com/golang/go/issues/5684 -package urlesc - -import ( - "bytes" - "net/url" - "strings" -) - -type encoding int - -const ( - encodePath encoding = 1 + iota - encodeUserPassword - encodeQueryComponent - encodeFragment -) - -// Return true if the specified character should be escaped when -// appearing in a URL string, according to RFC 3986. -func shouldEscape(c byte, mode encoding) bool { - // §2.3 Unreserved characters (alphanum) - if 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z' || '0' <= c && c <= '9' { - return false - } - - switch c { - case '-', '.', '_', '~': // §2.3 Unreserved characters (mark) - return false - - // §2.2 Reserved characters (reserved) - case ':', '/', '?', '#', '[', ']', '@', // gen-delims - '!', '$', '&', '\'', '(', ')', '*', '+', ',', ';', '=': // sub-delims - // Different sections of the URL allow a few of - // the reserved characters to appear unescaped. - switch mode { - case encodePath: // §3.3 - // The RFC allows sub-delims and : @. - // '/', '[' and ']' can be used to assign meaning to individual path - // segments. This package only manipulates the path as a whole, - // so we allow those as well. That leaves only ? and # to escape. - return c == '?' || c == '#' - - case encodeUserPassword: // §3.2.1 - // The RFC allows : and sub-delims in - // userinfo. The parsing of userinfo treats ':' as special so we must escape - // all the gen-delims. - return c == ':' || c == '/' || c == '?' || c == '#' || c == '[' || c == ']' || c == '@' - - case encodeQueryComponent: // §3.4 - // The RFC allows / and ?. - return c != '/' && c != '?' - - case encodeFragment: // §4.1 - // The RFC text is silent but the grammar allows - // everything, so escape nothing but # - return c == '#' - } - } - - // Everything else must be escaped. - return true -} - -// QueryEscape escapes the string so it can be safely placed -// inside a URL query. -func QueryEscape(s string) string { - return escape(s, encodeQueryComponent) -} - -func escape(s string, mode encoding) string { - spaceCount, hexCount := 0, 0 - for i := 0; i < len(s); i++ { - c := s[i] - if shouldEscape(c, mode) { - if c == ' ' && mode == encodeQueryComponent { - spaceCount++ - } else { - hexCount++ - } - } - } - - if spaceCount == 0 && hexCount == 0 { - return s - } - - t := make([]byte, len(s)+2*hexCount) - j := 0 - for i := 0; i < len(s); i++ { - switch c := s[i]; { - case c == ' ' && mode == encodeQueryComponent: - t[j] = '+' - j++ - case shouldEscape(c, mode): - t[j] = '%' - t[j+1] = "0123456789ABCDEF"[c>>4] - t[j+2] = "0123456789ABCDEF"[c&15] - j += 3 - default: - t[j] = s[i] - j++ - } - } - return string(t) -} - -var uiReplacer = strings.NewReplacer( - "%21", "!", - "%27", "'", - "%28", "(", - "%29", ")", - "%2A", "*", -) - -// unescapeUserinfo unescapes some characters that need not to be escaped as per RFC3986. -func unescapeUserinfo(s string) string { - return uiReplacer.Replace(s) -} - -// Escape reassembles the URL into a valid URL string. -// The general form of the result is one of: -// -// scheme:opaque -// scheme://userinfo@host/path?query#fragment -// -// If u.Opaque is non-empty, String uses the first form; -// otherwise it uses the second form. -// -// In the second form, the following rules apply: -// - if u.Scheme is empty, scheme: is omitted. -// - if u.User is nil, userinfo@ is omitted. -// - if u.Host is empty, host/ is omitted. -// - if u.Scheme and u.Host are empty and u.User is nil, -// the entire scheme://userinfo@host/ is omitted. -// - if u.Host is non-empty and u.Path begins with a /, -// the form host/path does not add its own /. -// - if u.RawQuery is empty, ?query is omitted. -// - if u.Fragment is empty, #fragment is omitted. -func Escape(u *url.URL) string { - var buf bytes.Buffer - if u.Scheme != "" { - buf.WriteString(u.Scheme) - buf.WriteByte(':') - } - if u.Opaque != "" { - buf.WriteString(u.Opaque) - } else { - if u.Scheme != "" || u.Host != "" || u.User != nil { - buf.WriteString("//") - if ui := u.User; ui != nil { - buf.WriteString(unescapeUserinfo(ui.String())) - buf.WriteByte('@') - } - if h := u.Host; h != "" { - buf.WriteString(h) - } - } - if u.Path != "" && u.Path[0] != '/' && u.Host != "" { - buf.WriteByte('/') - } - buf.WriteString(escape(u.Path, encodePath)) - } - if u.RawQuery != "" { - buf.WriteByte('?') - buf.WriteString(u.RawQuery) - } - if u.Fragment != "" { - buf.WriteByte('#') - buf.WriteString(escape(u.Fragment, encodeFragment)) - } - return buf.String() -} |