1 files changed, 0 insertions, 257 deletions
diff --git a/vendor/golang.org/x/net/html/charset/charset.go b/vendor/golang.org/x/net/html/charset/charset.go
deleted file mode 100644
index 13bed159..00000000
--- a/vendor/golang.org/x/net/html/charset/charset.go
+++ /dev/null
@@ -1,257 +0,0 @@
-// Copyright 2013 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 charset provides common text encodings for HTML documents.
-//
-// The mapping from encoding labels to encodings is defined at
-// https://encoding.spec.whatwg.org/.
-package charset // import "golang.org/x/net/html/charset"
-
-import (
-	"bytes"
-	"fmt"
-	"io"
-	"mime"
-	"strings"
-	"unicode/utf8"
-
-	"golang.org/x/net/html"
-	"golang.org/x/text/encoding"
-	"golang.org/x/text/encoding/charmap"
-	"golang.org/x/text/encoding/htmlindex"
-	"golang.org/x/text/transform"
-)
-
-// Lookup returns the encoding with the specified label, and its canonical
-// name. It returns nil and the empty string if label is not one of the
-// standard encodings for HTML. Matching is case-insensitive and ignores
-// leading and trailing whitespace. Encoders will use HTML escape sequences for
-// runes that are not supported by the character set.
-func Lookup(label string) (e encoding.Encoding, name string) {
-	e, err := htmlindex.Get(label)
-	if err != nil {
-		return nil, ""
-	}
-	name, _ = htmlindex.Name(e)
-	return &htmlEncoding{e}, name
-}
-
-type htmlEncoding struct{ encoding.Encoding }
-
-func (h *htmlEncoding) NewEncoder() *encoding.Encoder {
-	// HTML requires a non-terminating legacy encoder. We use HTML escapes to
-	// substitute unsupported code points.
-	return encoding.HTMLEscapeUnsupported(h.Encoding.NewEncoder())
-}
-
-// DetermineEncoding determines the encoding of an HTML document by examining
-// up to the first 1024 bytes of content and the declared Content-Type.
-//
-// See http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#determining-the-character-encoding
-func DetermineEncoding(content []byte, contentType string) (e encoding.Encoding, name string, certain bool) {
-	if len(content) > 1024 {
-		content = content[:1024]
-	}
-
-	for _, b := range boms {
-		if bytes.HasPrefix(content, b.bom) {
-			e, name = Lookup(b.enc)
-			return e, name, true
-		}
-	}
-
-	if _, params, err := mime.ParseMediaType(contentType); err == nil {
-		if cs, ok := params["charset"]; ok {
-			if e, name = Lookup(cs); e != nil {
-				return e, name, true
-			}
-		}
-	}
-
-	if len(content) > 0 {
-		e, name = prescan(content)
-		if e != nil {
-			return e, name, false
-		}
-	}
-
-	// Try to detect UTF-8.
-	// First eliminate any partial rune at the end.
-	for i := len(content) - 1; i >= 0 && i > len(content)-4; i-- {
-		b := content[i]
-		if b < 0x80 {
-			break
-		}
-		if utf8.RuneStart(b) {
-			content = content[:i]
-			break
-		}
-	}
-	hasHighBit := false
-	for _, c := range content {
-		if c >= 0x80 {
-			hasHighBit = true
-			break
-		}
-	}
-	if hasHighBit && utf8.Valid(content) {
-		return encoding.Nop, "utf-8", false
-	}
-
-	// TODO: change default depending on user's locale?
-	return charmap.Windows1252, "windows-1252", false
-}
-
-// NewReader returns an io.Reader that converts the content of r to UTF-8.
-// It calls DetermineEncoding to find out what r's encoding is.
-func NewReader(r io.Reader, contentType string) (io.Reader, error) {
-	preview := make([]byte, 1024)
-	n, err := io.ReadFull(r, preview)
-	switch {
-	case err == io.ErrUnexpectedEOF:
-		preview = preview[:n]
-		r = bytes.NewReader(preview)
-	case err != nil:
-		return nil, err
-	default:
-		r = io.MultiReader(bytes.NewReader(preview), r)
-	}
-
-	if e, _, _ := DetermineEncoding(preview, contentType); e != encoding.Nop {
-		r = transform.NewReader(r, e.NewDecoder())
-	}
-	return r, nil
-}
-
-// NewReaderLabel returns a reader that converts from the specified charset to
-// UTF-8. It uses Lookup to find the encoding that corresponds to label, and
-// returns an error if Lookup returns nil. It is suitable for use as
-// encoding/xml.Decoder's CharsetReader function.
-func NewReaderLabel(label string, input io.Reader) (io.Reader, error) {
-	e, _ := Lookup(label)
-	if e == nil {
-		return nil, fmt.Errorf("unsupported charset: %q", label)
-	}
-	return transform.NewReader(input, e.NewDecoder()), nil
-}
-
-func prescan(content []byte) (e encoding.Encoding, name string) {
-	z := html.NewTokenizer(bytes.NewReader(content))
-	for {
-		switch z.Next() {
-		case html.ErrorToken:
-			return nil, ""
-
-		case html.StartTagToken, html.SelfClosingTagToken:
-			tagName, hasAttr := z.TagName()
-			if !bytes.Equal(tagName, []byte("meta")) {
-				continue
-			}
-			attrList := make(map[string]bool)
-			gotPragma := false
-
-			const (
-				dontKnow = iota
-				doNeedPragma
-				doNotNeedPragma
-			)
-			needPragma := dontKnow
-
-			name = ""
-			e = nil
-			for hasAttr {
-				var key, val []byte
-				key, val, hasAttr = z.TagAttr()
-				ks := string(key)
-				if attrList[ks] {
-					continue
-				}
-				attrList[ks] = true
-				for i, c := range val {
-					if 'A' <= c && c <= 'Z' {
-						val[i] = c + 0x20
-					}
-				}
-
-				switch ks {
-				case "http-equiv":
-					if bytes.Equal(val, []byte("content-type")) {
-						gotPragma = true
-					}
-
-				case "content":
-					if e == nil {
-						name = fromMetaElement(string(val))
-						if name != "" {
-							e, name = Lookup(name)
-							if e != nil {
-								needPragma = doNeedPragma
-							}
-						}
-					}
-
-				case "charset":
-					e, name = Lookup(string(val))
-					needPragma = doNotNeedPragma
-				}
-			}
-
-			if needPragma == dontKnow || needPragma == doNeedPragma && !gotPragma {
-				continue
-			}
-
-			if strings.HasPrefix(name, "utf-16") {
-				name = "utf-8"
-				e = encoding.Nop
-			}
-
-			if e != nil {
-				return e, name
-			}
-		}
-	}
-}
-
-func fromMetaElement(s string) string {
-	for s != "" {
-		csLoc := strings.Index(s, "charset")
-		if csLoc == -1 {
-			return ""
-		}
-		s = s[csLoc+len("charset"):]
-		s = strings.TrimLeft(s, " \t\n\f\r")
-		if !strings.HasPrefix(s, "=") {
-			continue
-		}
-		s = s[1:]
-		s = strings.TrimLeft(s, " \t\n\f\r")
-		if s == "" {
-			return ""
-		}
-		if q := s[0]; q == '"' || q == '\'' {
-			s = s[1:]
-			closeQuote := strings.IndexRune(s, rune(q))
-			if closeQuote == -1 {
-				return ""
-			}
-			return s[:closeQuote]
-		}
-
-		end := strings.IndexAny(s, "; \t\n\f\r")
-		if end == -1 {
-			end = len(s)
-		}
-		return s[:end]
-	}
-	return ""
-}
-
-var boms = []struct {
-	bom []byte
-	enc string
-}{
-	{[]byte{0xfe, 0xff}, "utf-16be"},
-	{[]byte{0xff, 0xfe}, "utf-16le"},
-	{[]byte{0xef, 0xbb, 0xbf}, "utf-8"},
-}