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author | Hyeseong Kim <cometkim.kr@gmail.com> | 2018-05-01 01:54:11 +0900 |
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committer | Christopher Speller <crspeller@gmail.com> | 2018-04-30 09:54:11 -0700 |
commit | e73f1d73143ebba9c7e80d21c45bba9b61f2611c (patch) | |
tree | e84e85d12308ae5624643ff7768f55be45c3350c /vendor/golang.org/x/text/encoding/korean/euckr.go | |
parent | 9c5815ee41f29e27774d17382d9a4bd10d208545 (diff) | |
download | chat-e73f1d73143ebba9c7e80d21c45bba9b61f2611c.tar.gz chat-e73f1d73143ebba9c7e80d21c45bba9b61f2611c.tar.bz2 chat-e73f1d73143ebba9c7e80d21c45bba9b61f2611c.zip |
MM-9072/MM-10185 Force-convert the encoding of OpenGraph metadata to UTF-8 (#8631)
* Force-convert non-UTF8 HTML to UTF8 before opengraph processing
* Split the force-encoding function
* Add benchmark Test for the forceHTMLEncodingToUTF8()
```
Running tool: /home/comet/go-v1.9.2/bin/go test -benchmem -run=^$ github.com/mattermost/mattermost-server/app -bench ^BenchmarkForceHTMLEncodingToUTF8$
[03:32:58 KST 2018/04/21] [INFO] (github.com/mattermost/mattermost-server/app.TestMain:28) -test.run used, not creating temporary containers
goos: linux
goarch: amd64
pkg: github.com/mattermost/mattermost-server/app
BenchmarkForceHTMLEncodingToUTF8/with_converting-4 100000 11201 ns/op 18704 B/op 32 allocs/op
BenchmarkForceHTMLEncodingToUTF8/without_converting-4 300000 3931 ns/op 4632 B/op 13 allocs/op
PASS
ok github.com/mattermost/mattermost-server/app 2.703s
Success: Benchmarks passed.
```
* Remove an unnecessary constraint
* Add pre-check if content-type header is already utf-8
* Move the checking for utf-8 into forceHTMLEncodingToUTF8() for testing
* Revert df3f347213faa0d023c26d201fa6531f46391086..HEAD, without Gopkg.lock
Diffstat (limited to 'vendor/golang.org/x/text/encoding/korean/euckr.go')
-rw-r--r-- | vendor/golang.org/x/text/encoding/korean/euckr.go | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/vendor/golang.org/x/text/encoding/korean/euckr.go b/vendor/golang.org/x/text/encoding/korean/euckr.go new file mode 100644 index 000000000..034337f5d --- /dev/null +++ b/vendor/golang.org/x/text/encoding/korean/euckr.go @@ -0,0 +1,177 @@ +// 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 korean + +import ( + "unicode/utf8" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +// All is a list of all defined encodings in this package. +var All = []encoding.Encoding{EUCKR} + +// EUCKR is the EUC-KR encoding, also known as Code Page 949. +var EUCKR encoding.Encoding = &eucKR + +var eucKR = internal.Encoding{ + &internal.SimpleEncoding{eucKRDecoder{}, eucKREncoder{}}, + "EUC-KR", + identifier.EUCKR, +} + +type eucKRDecoder struct{ transform.NopResetter } + +func (eucKRDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 +loop: + for ; nSrc < len(src); nSrc += size { + switch c0 := src[nSrc]; { + case c0 < utf8.RuneSelf: + r, size = rune(c0), 1 + + case 0x81 <= c0 && c0 < 0xff: + if nSrc+1 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + r, size = utf8.RuneError, 1 + break + } + c1 := src[nSrc+1] + size = 2 + if c0 < 0xc7 { + r = 178 * rune(c0-0x81) + switch { + case 0x41 <= c1 && c1 < 0x5b: + r += rune(c1) - (0x41 - 0*26) + case 0x61 <= c1 && c1 < 0x7b: + r += rune(c1) - (0x61 - 1*26) + case 0x81 <= c1 && c1 < 0xff: + r += rune(c1) - (0x81 - 2*26) + default: + goto decError + } + } else if 0xa1 <= c1 && c1 < 0xff { + r = 178*(0xc7-0x81) + rune(c0-0xc7)*94 + rune(c1-0xa1) + } else { + goto decError + } + if int(r) < len(decode) { + r = rune(decode[r]) + if r != 0 { + break + } + } + decError: + r = utf8.RuneError + if c1 < utf8.RuneSelf { + size = 1 + } + + default: + r, size = utf8.RuneError, 1 + break + } + + if nDst+utf8.RuneLen(r) > len(dst) { + err = transform.ErrShortDst + break + } + nDst += utf8.EncodeRune(dst[nDst:], r) + } + return nDst, nSrc, err +} + +type eucKREncoder struct{ transform.NopResetter } + +func (eucKREncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 + for ; nSrc < len(src); nSrc += size { + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + size = 1 + + if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = uint8(r) + nDst++ + continue + + } else { + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + break + } + } + + // func init checks that the switch covers all tables. + switch { + case encode0Low <= r && r < encode0High: + if r = rune(encode0[r-encode0Low]); r != 0 { + goto write2 + } + case encode1Low <= r && r < encode1High: + if r = rune(encode1[r-encode1Low]); r != 0 { + goto write2 + } + case encode2Low <= r && r < encode2High: + if r = rune(encode2[r-encode2Low]); r != 0 { + goto write2 + } + case encode3Low <= r && r < encode3High: + if r = rune(encode3[r-encode3Low]); r != 0 { + goto write2 + } + case encode4Low <= r && r < encode4High: + if r = rune(encode4[r-encode4Low]); r != 0 { + goto write2 + } + case encode5Low <= r && r < encode5High: + if r = rune(encode5[r-encode5Low]); r != 0 { + goto write2 + } + case encode6Low <= r && r < encode6High: + if r = rune(encode6[r-encode6Low]); r != 0 { + goto write2 + } + } + err = internal.ErrASCIIReplacement + break + } + + write2: + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = uint8(r >> 8) + dst[nDst+1] = uint8(r) + nDst += 2 + continue + } + return nDst, nSrc, err +} + +func init() { + // Check that the hard-coded encode switch covers all tables. + if numEncodeTables != 7 { + panic("bad numEncodeTables") + } +} |