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forgejo/modules/markup/csv/csv.go
Giteabot e151e04673
Fix incorrect rendering csv file when file size is larger than UI.CSV.MaxFileSize (#29653) (#29663)
Backport #29653 by @yp05327

Fix #29506

Co-authored-by: yp05327 <576951401@qq.com>
(cherry picked from commit 6651d2d87aa4af96bf2c992e3ecae6a290d07496)
2024-03-10 18:45:59 +07:00

144 lines
3.3 KiB
Go

// Copyright 2018 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package markup
import (
"bufio"
"bytes"
"html"
"io"
"regexp"
"strconv"
"code.gitea.io/gitea/modules/csv"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/setting"
)
func init() {
markup.RegisterRenderer(Renderer{})
}
// Renderer implements markup.Renderer for csv files
type Renderer struct{}
// Name implements markup.Renderer
func (Renderer) Name() string {
return "csv"
}
// Extensions implements markup.Renderer
func (Renderer) Extensions() []string {
return []string{".csv", ".tsv"}
}
// SanitizerRules implements markup.Renderer
func (Renderer) SanitizerRules() []setting.MarkupSanitizerRule {
return []setting.MarkupSanitizerRule{
{Element: "table", AllowAttr: "class", Regexp: regexp.MustCompile(`data-table`)},
{Element: "th", AllowAttr: "class", Regexp: regexp.MustCompile(`line-num`)},
{Element: "td", AllowAttr: "class", Regexp: regexp.MustCompile(`line-num`)},
}
}
func writeField(w io.Writer, element, class, field string) error {
if _, err := io.WriteString(w, "<"); err != nil {
return err
}
if _, err := io.WriteString(w, element); err != nil {
return err
}
if len(class) > 0 {
if _, err := io.WriteString(w, " class=\""); err != nil {
return err
}
if _, err := io.WriteString(w, class); err != nil {
return err
}
if _, err := io.WriteString(w, "\""); err != nil {
return err
}
}
if _, err := io.WriteString(w, ">"); err != nil {
return err
}
if _, err := io.WriteString(w, html.EscapeString(field)); err != nil {
return err
}
if _, err := io.WriteString(w, "</"); err != nil {
return err
}
if _, err := io.WriteString(w, element); err != nil {
return err
}
_, err := io.WriteString(w, ">")
return err
}
// Render implements markup.Renderer
func (Renderer) Render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error {
tmpBlock := bufio.NewWriter(output)
// FIXME: don't read all to memory
rawBytes, err := io.ReadAll(input)
if err != nil {
return err
}
if setting.UI.CSV.MaxFileSize != 0 && setting.UI.CSV.MaxFileSize < int64(len(rawBytes)) {
if _, err := tmpBlock.WriteString("<pre>"); err != nil {
return err
}
if _, err := tmpBlock.WriteString(html.EscapeString(string(rawBytes))); err != nil {
return err
}
if _, err := tmpBlock.WriteString("</pre>"); err != nil {
return err
}
return tmpBlock.Flush()
}
rd, err := csv.CreateReaderAndDetermineDelimiter(ctx, bytes.NewReader(rawBytes))
if err != nil {
return err
}
if _, err := tmpBlock.WriteString(`<table class="data-table">`); err != nil {
return err
}
row := 1
for {
fields, err := rd.Read()
if err == io.EOF {
break
}
if err != nil {
continue
}
if _, err := tmpBlock.WriteString("<tr>"); err != nil {
return err
}
element := "td"
if row == 1 {
element = "th"
}
if err := writeField(tmpBlock, element, "line-num", strconv.Itoa(row)); err != nil {
return err
}
for _, field := range fields {
if err := writeField(tmpBlock, element, "", field); err != nil {
return err
}
}
if _, err := tmpBlock.WriteString("</tr>"); err != nil {
return err
}
row++
}
if _, err = tmpBlock.WriteString("</table>"); err != nil {
return err
}
return tmpBlock.Flush()
}