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116 lines
2.9 KiB
116 lines
2.9 KiB
// 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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package external
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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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"runtime"
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"strings"
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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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"code.gitea.io/gitea/modules/util"
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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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// 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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// 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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// NeedPostProcess implements markup.Parser
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func (p *Parser) NeedPostProcess() bool {
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return p.MarkupParser.NeedPostProcess
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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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func envMark(envName string) string {
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if runtime.GOOS == "windows" {
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return "%" + envName + "%"
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}
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return "$" + envName
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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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urlRawPrefix = strings.Replace(urlPrefix, "/src/", "/raw/", 1)
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command = strings.NewReplacer(envMark("GITEA_PREFIX_SRC"), urlPrefix,
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envMark("GITEA_PREFIX_RAW"), urlRawPrefix).Replace(p.Command)
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commands = strings.Fields(command)
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args = commands[1:]
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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("%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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tmpPath := f.Name()
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defer func() {
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if err := util.Remove(tmpPath); err != nil {
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log.Warn("Unable to remove temporary file: %s: Error: %v", tmpPath, err)
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}
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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("%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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err = f.Close()
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if err != nil {
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log.Error("%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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cmd := exec.Command(commands[0], args...)
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cmd.Env = append(
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os.Environ(),
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"GITEA_PREFIX_SRC="+urlPrefix,
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"GITEA_PREFIX_RAW="+urlRawPrefix,
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)
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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("%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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