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@@ -0,0 +1,88 @@
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+// Copyright 2017 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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+
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+package external
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+
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+import (
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+ "bytes"
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+ "io"
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+ "io/ioutil"
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+ "os"
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+ "os/exec"
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+ "strings"
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+
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+ "code.gitea.io/gitea/modules/log"
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+ "code.gitea.io/gitea/modules/markup"
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+ "code.gitea.io/gitea/modules/setting"
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+)
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+
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+// RegisterParsers registers all supported third part parsers according settings
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+func RegisterParsers() {
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+ for _, parser := range setting.ExternalMarkupParsers {
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+ if parser.Enabled && parser.Command != "" && len(parser.FileExtensions) > 0 {
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+ markup.RegisterParser(&Parser{parser})
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+ }
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+ }
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+}
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+
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+// Parser implements markup.Parser for external tools
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+type Parser struct {
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+ setting.MarkupParser
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+}
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+
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+// Name returns the external tool name
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+func (p *Parser) Name() string {
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+ return p.MarkupName
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+}
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+
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+// Extensions returns the supported extensions of the tool
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+func (p *Parser) Extensions() []string {
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+ return p.FileExtensions
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+}
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+
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+// Render renders the data of the document to HTML via the external tool.
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+func (p *Parser) Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte {
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+ var (
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+ bs []byte
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+ buf = bytes.NewBuffer(bs)
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+ rd = bytes.NewReader(rawBytes)
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+ commands = strings.Fields(p.Command)
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+ args = commands[1:]
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+ )
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+
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+ if p.IsInputFile {
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+ // write to temp file
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+ f, err := ioutil.TempFile("", "gitea_input")
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+ if err != nil {
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+ log.Error(4, "%s create temp file when rendering %s failed: %v", p.Name(), p.Command, err)
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+ return []byte("")
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+ }
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+ defer os.Remove(f.Name())
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+
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+ _, err = io.Copy(f, rd)
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+ if err != nil {
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+ f.Close()
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+ log.Error(4, "%s write data to temp file when rendering %s failed: %v", p.Name(), p.Command, err)
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+ return []byte("")
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+ }
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+
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+ err = f.Close()
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+ if err != nil {
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+ log.Error(4, "%s close temp file when rendering %s failed: %v", p.Name(), p.Command, err)
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+ return []byte("")
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+ }
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+ args = append(args, f.Name())
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+ }
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+
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+ cmd := exec.Command(commands[0], args...)
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+ if !p.IsInputFile {
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+ cmd.Stdin = rd
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+ }
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+ cmd.Stdout = buf
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+ if err := cmd.Run(); err != nil {
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+ log.Error(4, "%s render run command %s %v failed: %v", p.Name(), commands[0], args, err)
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+ return []byte("")
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+ }
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+ return buf.Bytes()
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+}
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