Add csv file render support defaultly (#4105)

* add csv file render support defaultly

* escaping csv column content

modules/markup/csv/csv.go

@@ -0,0 +1,58 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package markup
+
+import (
+	"bytes"
+	"encoding/csv"
+	"html"
+	"io"
+
+	"code.gitea.io/gitea/modules/markup"
+)
+
+func init() {
+	markup.RegisterParser(Parser{})
+}
+
+// Parser implements markup.Parser for orgmode
+type Parser struct {
+}
+
+// Name implements markup.Parser
+func (Parser) Name() string {
+	return "csv"
+}
+
+// Extensions implements markup.Parser
+func (Parser) Extensions() []string {
+	return []string{".csv"}
+}
+
+// Render implements markup.Parser
+func (Parser) Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte {
+	rd := csv.NewReader(bytes.NewReader(rawBytes))
+	var tmpBlock bytes.Buffer
+	tmpBlock.WriteString(`<table class="table">`)
+	for {
+		fields, err := rd.Read()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			continue
+		}
+		tmpBlock.WriteString("<tr>")
+		for _, field := range fields {
+			tmpBlock.WriteString("<td>")
+			tmpBlock.WriteString(html.EscapeString(field))
+			tmpBlock.WriteString("</td>")
+		}
+		tmpBlock.WriteString("<tr>")
+	}
+	tmpBlock.WriteString("</table>")
+
+	return tmpBlock.Bytes()
+}

modules/markup/csv/csv_test.go

@@ -0,0 +1,25 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package markup
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRenderCSV(t *testing.T) {
+	var parser Parser
+	var kases = map[string]string{
+		"a":     "<table class=\"table\"><tr><td>a</td><tr></table>",
+		"1,2":   "<table class=\"table\"><tr><td>1</td><td>2</td><tr></table>",
+		"<br/>": "<table class=\"table\"><tr><td>&lt;br/&gt;</td><tr></table>",
+	}
+
+	for k, v := range kases {
+		res := parser.Render([]byte(k), "", nil, false)
+		assert.EqualValues(t, v, string(res))
+	}
+}