1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
// Copyright 2017 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 external
import (
"fmt"
"io"
"os"
"os/exec"
"runtime"
"strings"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
)
// RegisterRenderers registers all supported third part renderers according settings
func RegisterRenderers() {
for _, renderer := range setting.ExternalMarkupRenderers {
if renderer.Enabled && renderer.Command != "" && len(renderer.FileExtensions) > 0 {
markup.RegisterRenderer(&Renderer{renderer})
}
}
}
// Renderer implements markup.Renderer for external tools
type Renderer struct {
*setting.MarkupRenderer
}
var (
_ markup.PostProcessRenderer = (*Renderer)(nil)
_ markup.ExternalRenderer = (*Renderer)(nil)
)
// Name returns the external tool name
func (p *Renderer) Name() string {
return p.MarkupName
}
// NeedPostProcess implements markup.Renderer
func (p *Renderer) NeedPostProcess() bool {
return p.MarkupRenderer.NeedPostProcess
}
// Extensions returns the supported extensions of the tool
func (p *Renderer) Extensions() []string {
return p.FileExtensions
}
// SanitizerRules implements markup.Renderer
func (p *Renderer) SanitizerRules() []setting.MarkupSanitizerRule {
return p.MarkupSanitizerRules
}
// SanitizerDisabled disabled sanitize if return true
func (p *Renderer) SanitizerDisabled() bool {
return p.RenderContentMode == setting.RenderContentModeNoSanitizer || p.RenderContentMode == setting.RenderContentModeIframe
}
// DisplayInIFrame represents whether render the content with an iframe
func (p *Renderer) DisplayInIFrame() bool {
return p.RenderContentMode == setting.RenderContentModeIframe
}
func envMark(envName string) string {
if runtime.GOOS == "windows" {
return "%" + envName + "%"
}
return "$" + envName
}
// Render renders the data of the document to HTML via the external tool.
func (p *Renderer) Render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error {
var (
urlRawPrefix = strings.Replace(ctx.URLPrefix, "/src/", "/raw/", 1)
command = strings.NewReplacer(envMark("GITEA_PREFIX_SRC"), ctx.URLPrefix,
envMark("GITEA_PREFIX_RAW"), urlRawPrefix).Replace(p.Command)
commands = strings.Fields(command)
args = commands[1:]
)
if p.IsInputFile {
// write to temp file
f, err := os.CreateTemp("", "gitea_input")
if err != nil {
return fmt.Errorf("%s create temp file when rendering %s failed: %v", p.Name(), p.Command, err)
}
tmpPath := f.Name()
defer func() {
if err := util.Remove(tmpPath); err != nil {
log.Warn("Unable to remove temporary file: %s: Error: %v", tmpPath, err)
}
}()
_, err = io.Copy(f, input)
if err != nil {
f.Close()
return fmt.Errorf("%s write data to temp file when rendering %s failed: %v", p.Name(), p.Command, err)
}
err = f.Close()
if err != nil {
return fmt.Errorf("%s close temp file when rendering %s failed: %v", p.Name(), p.Command, err)
}
args = append(args, f.Name())
}
if ctx == nil || ctx.Ctx == nil {
if ctx == nil {
log.Warn("RenderContext not provided defaulting to empty ctx")
ctx = &markup.RenderContext{}
}
log.Warn("RenderContext did not provide context, defaulting to Shutdown context")
ctx.Ctx = graceful.GetManager().ShutdownContext()
}
processCtx, _, finished := process.GetManager().AddContext(ctx.Ctx, fmt.Sprintf("Render [%s] for %s", commands[0], ctx.URLPrefix))
defer finished()
cmd := exec.CommandContext(processCtx, commands[0], args...)
cmd.Env = append(
os.Environ(),
"GITEA_PREFIX_SRC="+ctx.URLPrefix,
"GITEA_PREFIX_RAW="+urlRawPrefix,
)
if !p.IsInputFile {
cmd.Stdin = input
}
cmd.Stdout = output
process.SetSysProcAttribute(cmd)
if err := cmd.Run(); err != nil {
return fmt.Errorf("%s render run command %s %v failed: %v", p.Name(), commands[0], args, err)
}
return nil
}
|
