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88 lines
3.2 KiB
88 lines
3.2 KiB
// Copyright 2022 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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//go:generate go run invisible/generate.go -v -o ./invisible_gen.go
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//go:generate go run ambiguous/generate.go -v -o ./ambiguous_gen.go ambiguous/ambiguous.json
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package charset
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import (
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"bufio"
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"io"
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"strings"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/translation"
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)
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// RuneNBSP is the codepoint for NBSP
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const RuneNBSP = 0xa0
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// EscapeControlHTML escapes the unicode control sequences in a provided html document
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func EscapeControlHTML(text string, locale translation.Locale, allowed ...rune) (escaped *EscapeStatus, output string) {
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sb := &strings.Builder{}
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outputStream := &HTMLStreamerWriter{Writer: sb}
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streamer := NewEscapeStreamer(locale, outputStream, allowed...).(*escapeStreamer)
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if err := StreamHTML(strings.NewReader(text), streamer); err != nil {
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streamer.escaped.HasError = true
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log.Error("Error whilst escaping: %v", err)
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}
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return streamer.escaped, sb.String()
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}
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// EscapeControlReaders escapes the unicode control sequences in a provided reader of HTML content and writer in a locale and returns the findings as an EscapeStatus and the escaped []byte
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func EscapeControlReader(reader io.Reader, writer io.Writer, locale translation.Locale, allowed ...rune) (escaped *EscapeStatus, err error) {
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outputStream := &HTMLStreamerWriter{Writer: writer}
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streamer := NewEscapeStreamer(locale, outputStream, allowed...).(*escapeStreamer)
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if err = StreamHTML(reader, streamer); err != nil {
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streamer.escaped.HasError = true
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log.Error("Error whilst escaping: %v", err)
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}
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return streamer.escaped, err
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}
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// EscapeControlStringReader escapes the unicode control sequences in a provided reader of string content and writer in a locale and returns the findings as an EscapeStatus and the escaped []byte
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func EscapeControlStringReader(reader io.Reader, writer io.Writer, locale translation.Locale, allowed ...rune) (escaped *EscapeStatus, err error) {
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bufRd := bufio.NewReader(reader)
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outputStream := &HTMLStreamerWriter{Writer: writer}
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streamer := NewEscapeStreamer(locale, outputStream, allowed...).(*escapeStreamer)
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for {
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line, rdErr := bufRd.ReadString('\n')
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if len(line) > 0 {
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if err := streamer.Text(line); err != nil {
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streamer.escaped.HasError = true
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log.Error("Error whilst escaping: %v", err)
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return streamer.escaped, err
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}
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}
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if rdErr != nil {
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if rdErr != io.EOF {
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err = rdErr
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}
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break
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}
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if err := streamer.SelfClosingTag("br"); err != nil {
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streamer.escaped.HasError = true
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return streamer.escaped, err
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}
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}
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return streamer.escaped, err
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}
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// EscapeControlString escapes the unicode control sequences in a provided string and returns the findings as an EscapeStatus and the escaped string
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func EscapeControlString(text string, locale translation.Locale, allowed ...rune) (escaped *EscapeStatus, output string) {
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sb := &strings.Builder{}
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outputStream := &HTMLStreamerWriter{Writer: sb}
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streamer := NewEscapeStreamer(locale, outputStream, allowed...).(*escapeStreamer)
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if err := streamer.Text(text); err != nil {
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streamer.escaped.HasError = true
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log.Error("Error whilst escaping: %v", err)
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}
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return streamer.escaped, sb.String()
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}
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