forked from gitea/gitea
Add sanitizer rules per renderer (#16110)
* Added sanitizer rules per renderer. * Updated documentation. Co-authored-by: techknowlogick <techknowlogick@gitea.io>
This commit is contained in:
KN4CK3R
GitHub
parent
eb324a9402
commit
c9c7afda1a
|
|
@ -907,13 +907,17 @@ Gitea supports customizing the sanitization policy for rendered HTML. The exampl
|
|||
ELEMENT = span
|
||||
ALLOW_ATTR = class
|
||||
REGEXP = ^\s*((math(\s+|$)|inline(\s+|$)|display(\s+|$)))+
|
||||
ALLOW_DATA_URI_IMAGES = true
|
||||
```
|
||||
|
||||
- `ELEMENT`: The element this policy applies to. Must be non-empty.
|
||||
- `ALLOW_ATTR`: The attribute this policy allows. Must be non-empty.
|
||||
- `REGEXP`: A regex to match the contents of the attribute against. Must be present but may be empty for unconditional whitelisting of this attribute.
|
||||
- `ALLOW_DATA_URI_IMAGES`: **false** Allow data uri images (`<img src="data:image/png;base64,..."/>`).
|
||||
|
||||
Multiple sanitisation rules can be defined by adding unique subsections, e.g. `[markup.sanitizer.TeX-2]`.
|
||||
To apply a sanitisation rules only for a specify external renderer they must use the renderer name, e.g. `[markup.sanitizer.asciidoc.rule-1]`.
|
||||
If the rule is defined above the renderer ini section or the name does not match a renderer it is applied to every renderer.
|
||||
|
||||
## Time (`time`)
|
||||
|
||||
|
|
|
|||
|
|
@ -64,8 +64,8 @@ IS_INPUT_FILE = false
|
|||
[markup.jupyter]
|
||||
ENABLED = true
|
||||
FILE_EXTENSIONS = .ipynb
|
||||
RENDER_COMMAND = "jupyter nbconvert --stdout --to html --template basic "
|
||||
IS_INPUT_FILE = true
|
||||
RENDER_COMMAND = "jupyter nbconvert --stdin --stdout --to html --template basic"
|
||||
IS_INPUT_FILE = false
|
||||
|
||||
[markup.restructuredtext]
|
||||
ENABLED = true
|
||||
|
|
@ -90,15 +90,50 @@ FILE_EXTENSIONS = .md,.markdown
|
|||
RENDER_COMMAND = pandoc -f markdown -t html --katex
|
||||
```
|
||||
|
||||
You must define `ELEMENT`, `ALLOW_ATTR`, and `REGEXP` in each section.
|
||||
You must define `ELEMENT` and `ALLOW_ATTR` in each section.
|
||||
|
||||
To define multiple entries, add a unique alphanumeric suffix (e.g., `[markup.sanitizer.1]` and `[markup.sanitizer.something]`).
|
||||
|
||||
To apply a sanitisation rules only for a specify external renderer they must use the renderer name, e.g. `[markup.sanitizer.asciidoc.rule-1]`, `[markup.sanitizer.<renderer>.rule-1]`.
|
||||
|
||||
**Note**: If the rule is defined above the renderer ini section or the name does not match a renderer it is applied to every renderer.
|
||||
|
||||
Once your configuration changes have been made, restart Gitea to have changes take effect.
|
||||
|
||||
**Note**: Prior to Gitea 1.12 there was a single `markup.sanitiser` section with keys that were redefined for multiple rules, however,
|
||||
there were significant problems with this method of configuration necessitating configuration through multiple sections.
|
||||
|
||||
### Example: Office DOCX
|
||||
|
||||
Display Office DOCX files with [`pandoc`](https://pandoc.org/):
|
||||
```ini
|
||||
[markup.docx]
|
||||
ENABLED = true
|
||||
FILE_EXTENSIONS = .docx
|
||||
RENDER_COMMAND = "pandoc --from docx --to html --self-contained --template /path/to/basic.html"
|
||||
|
||||
[markup.sanitizer.docx.img]
|
||||
ALLOW_DATA_URI_IMAGES = true
|
||||
```
|
||||
|
||||
The template file has the following content:
|
||||
```
|
||||
$body$
|
||||
```
|
||||
|
||||
### Example: Jupyter Notebook
|
||||
|
||||
Display Jupyter Notebook files with [`nbconvert`](https://github.com/jupyter/nbconvert):
|
||||
```ini
|
||||
[markup.jupyter]
|
||||
ENABLED = true
|
||||
FILE_EXTENSIONS = .ipynb
|
||||
RENDER_COMMAND = "jupyter-nbconvert --stdin --stdout --to html --template basic"
|
||||
|
||||
[markup.sanitizer.jupyter.img]
|
||||
ALLOW_DATA_URI_IMAGES = true
|
||||
```
|
||||
|
||||
## Customizing CSS
|
||||
The external renderer is specified in the .ini in the format `[markup.XXXXX]` and the HTML supplied by your external renderer will be wrapped in a `<div>` with classes `markup` and `XXXXX`. The `markup` class provides out of the box styling (as does `markdown` if `XXXXX` is `markdown`). Otherwise you can use these classes to specifically target the contents of your rendered HTML.
|
||||
|
||||
|
|
|
|||
|
|
@ -10,6 +10,7 @@ import (
|
|||
"html"
|
||||
"io"
|
||||
"io/ioutil"
|
||||
"regexp"
|
||||
"strconv"
|
||||
|
||||
"code.gitea.io/gitea/modules/csv"
|
||||
|
|
@ -38,6 +39,15 @@ 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
|
||||
|
|
|
|||
|
|
@ -30,7 +30,7 @@ func RegisterRenderers() {
|
|||
|
||||
// Renderer implements markup.Renderer for external tools
|
||||
type Renderer struct {
|
||||
setting.MarkupRenderer
|
||||
*setting.MarkupRenderer
|
||||
}
|
||||
|
||||
// Name returns the external tool name
|
||||
|
|
@ -48,6 +48,11 @@ func (p *Renderer) Extensions() []string {
|
|||
return p.FileExtensions
|
||||
}
|
||||
|
||||
// SanitizerRules implements markup.Renderer
|
||||
func (p *Renderer) SanitizerRules() []setting.MarkupSanitizerRule {
|
||||
return p.MarkupSanitizerRules
|
||||
}
|
||||
|
||||
func envMark(envName string) string {
|
||||
if runtime.GOOS == "windows" {
|
||||
return "%" + envName + "%"
|
||||
|
|
|
|||
|
|
@ -112,7 +112,7 @@ func TestRender_links(t *testing.T) {
|
|||
|
||||
defaultCustom := setting.Markdown.CustomURLSchemes
|
||||
setting.Markdown.CustomURLSchemes = []string{"ftp", "magnet"}
|
||||
ReplaceSanitizer()
|
||||
InitializeSanitizer()
|
||||
CustomLinkURLSchemes(setting.Markdown.CustomURLSchemes)
|
||||
|
||||
test(
|
||||
|
|
@ -192,7 +192,7 @@ func TestRender_links(t *testing.T) {
|
|||
|
||||
// Restore previous settings
|
||||
setting.Markdown.CustomURLSchemes = defaultCustom
|
||||
ReplaceSanitizer()
|
||||
InitializeSanitizer()
|
||||
CustomLinkURLSchemes(setting.Markdown.CustomURLSchemes)
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -199,7 +199,7 @@ func actualRender(ctx *markup.RenderContext, input io.Reader, output io.Writer)
|
|||
}
|
||||
_ = lw.Close()
|
||||
}()
|
||||
buf := markup.SanitizeReader(rd)
|
||||
buf := markup.SanitizeReader(rd, "")
|
||||
_, err := io.Copy(output, buf)
|
||||
return err
|
||||
}
|
||||
|
|
@ -215,7 +215,7 @@ func render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error
|
|||
if log.IsDebug() {
|
||||
log.Debug("Panic in markdown: %v\n%s", err, string(log.Stack(2)))
|
||||
}
|
||||
ret := markup.SanitizeReader(input)
|
||||
ret := markup.SanitizeReader(input, "")
|
||||
_, err = io.Copy(output, ret)
|
||||
if err != nil {
|
||||
log.Error("SanitizeReader failed: %v", err)
|
||||
|
|
@ -249,6 +249,11 @@ func (Renderer) Extensions() []string {
|
|||
return setting.Markdown.FileExtensions
|
||||
}
|
||||
|
||||
// SanitizerRules implements markup.Renderer
|
||||
func (Renderer) SanitizerRules() []setting.MarkupSanitizerRule {
|
||||
return []setting.MarkupSanitizerRule{}
|
||||
}
|
||||
|
||||
// Render implements markup.Renderer
|
||||
func (Renderer) Render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error {
|
||||
return render(ctx, input, output)
|
||||
|
|
|
|||
|
|
@ -13,6 +13,7 @@ import (
|
|||
|
||||
"code.gitea.io/gitea/modules/highlight"
|
||||
"code.gitea.io/gitea/modules/markup"
|
||||
"code.gitea.io/gitea/modules/setting"
|
||||
"code.gitea.io/gitea/modules/util"
|
||||
|
||||
"github.com/alecthomas/chroma"
|
||||
|
|
@ -41,6 +42,11 @@ func (Renderer) Extensions() []string {
|
|||
return []string{".org"}
|
||||
}
|
||||
|
||||
// SanitizerRules implements markup.Renderer
|
||||
func (Renderer) SanitizerRules() []setting.MarkupSanitizerRule {
|
||||
return []setting.MarkupSanitizerRule{}
|
||||
}
|
||||
|
||||
// Render renders orgmode rawbytes to HTML
|
||||
func Render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error {
|
||||
htmlWriter := org.NewHTMLWriter()
|
||||
|
|
|
|||
|
|
@ -81,6 +81,7 @@ type Renderer interface {
|
|||
Name() string // markup format name
|
||||
Extensions() []string
|
||||
NeedPostProcess() bool
|
||||
SanitizerRules() []setting.MarkupSanitizerRule
|
||||
Render(ctx *RenderContext, input io.Reader, output io.Writer) error
|
||||
}
|
||||
|
||||
|
|
@ -136,37 +137,32 @@ func render(ctx *RenderContext, renderer Renderer, input io.Reader, output io.Wr
|
|||
_ = pw.Close()
|
||||
}()
|
||||
|
||||
if renderer.NeedPostProcess() {
|
||||
pr2, pw2 := io.Pipe()
|
||||
defer func() {
|
||||
_ = pr2.Close()
|
||||
_ = pw2.Close()
|
||||
}()
|
||||
pr2, pw2 := io.Pipe()
|
||||
defer func() {
|
||||
_ = pr2.Close()
|
||||
_ = pw2.Close()
|
||||
}()
|
||||
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
buf := SanitizeReader(pr2)
|
||||
_, err = io.Copy(output, buf)
|
||||
_ = pr2.Close()
|
||||
wg.Done()
|
||||
}()
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
buf := SanitizeReader(pr2, renderer.Name())
|
||||
_, err = io.Copy(output, buf)
|
||||
_ = pr2.Close()
|
||||
wg.Done()
|
||||
}()
|
||||
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
if renderer.NeedPostProcess() {
|
||||
err = PostProcess(ctx, pr, pw2)
|
||||
_ = pr.Close()
|
||||
_ = pw2.Close()
|
||||
wg.Done()
|
||||
}()
|
||||
} else {
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
buf := SanitizeReader(pr)
|
||||
_, err = io.Copy(output, buf)
|
||||
_ = pr.Close()
|
||||
wg.Done()
|
||||
}()
|
||||
}
|
||||
} else {
|
||||
_, err = io.Copy(pw2, pr)
|
||||
}
|
||||
_ = pr.Close()
|
||||
_ = pw2.Close()
|
||||
wg.Done()
|
||||
}()
|
||||
|
||||
if err1 := renderer.Render(ctx, input, pw); err1 != nil {
|
||||
return err1
|
||||
}
|
||||
|
|
|
|||
|
|
@ -19,8 +19,9 @@ import (
|
|||
// Sanitizer is a protection wrapper of *bluemonday.Policy which does not allow
|
||||
// any modification to the underlying policies once it's been created.
|
||||
type Sanitizer struct {
|
||||
policy *bluemonday.Policy
|
||||
init sync.Once
|
||||
defaultPolicy *bluemonday.Policy
|
||||
rendererPolicies map[string]*bluemonday.Policy
|
||||
init sync.Once
|
||||
}
|
||||
|
||||
var sanitizer = &Sanitizer{}
|
||||
|
|
@ -30,47 +31,57 @@ var sanitizer = &Sanitizer{}
|
|||
// entire application lifecycle.
|
||||
func NewSanitizer() {
|
||||
sanitizer.init.Do(func() {
|
||||
ReplaceSanitizer()
|
||||
InitializeSanitizer()
|
||||
})
|
||||
}
|
||||
|
||||
// ReplaceSanitizer replaces the current sanitizer to account for changes in settings
|
||||
func ReplaceSanitizer() {
|
||||
sanitizer.policy = bluemonday.UGCPolicy()
|
||||
// InitializeSanitizer (re)initializes the current sanitizer to account for changes in settings
|
||||
func InitializeSanitizer() {
|
||||
sanitizer.rendererPolicies = map[string]*bluemonday.Policy{}
|
||||
sanitizer.defaultPolicy = createDefaultPolicy()
|
||||
|
||||
for name, renderer := range renderers {
|
||||
sanitizerRules := renderer.SanitizerRules()
|
||||
if len(sanitizerRules) > 0 {
|
||||
policy := createDefaultPolicy()
|
||||
addSanitizerRules(policy, sanitizerRules)
|
||||
sanitizer.rendererPolicies[name] = policy
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func createDefaultPolicy() *bluemonday.Policy {
|
||||
policy := bluemonday.UGCPolicy()
|
||||
// For Chroma markdown plugin
|
||||
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^is-loading$`)).OnElements("pre")
|
||||
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(chroma )?language-[\w-]+$`)).OnElements("code")
|
||||
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^is-loading$`)).OnElements("pre")
|
||||
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(chroma )?language-[\w-]+$`)).OnElements("code")
|
||||
|
||||
// Checkboxes
|
||||
sanitizer.policy.AllowAttrs("type").Matching(regexp.MustCompile(`^checkbox$`)).OnElements("input")
|
||||
sanitizer.policy.AllowAttrs("checked", "disabled", "data-source-position").OnElements("input")
|
||||
policy.AllowAttrs("type").Matching(regexp.MustCompile(`^checkbox$`)).OnElements("input")
|
||||
policy.AllowAttrs("checked", "disabled", "data-source-position").OnElements("input")
|
||||
|
||||
// Custom URL-Schemes
|
||||
if len(setting.Markdown.CustomURLSchemes) > 0 {
|
||||
sanitizer.policy.AllowURLSchemes(setting.Markdown.CustomURLSchemes...)
|
||||
policy.AllowURLSchemes(setting.Markdown.CustomURLSchemes...)
|
||||
}
|
||||
|
||||
// Allow classes for anchors
|
||||
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`ref-issue`)).OnElements("a")
|
||||
policy.AllowAttrs("class").Matching(regexp.MustCompile(`ref-issue`)).OnElements("a")
|
||||
|
||||
// Allow classes for task lists
|
||||
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`task-list-item`)).OnElements("li")
|
||||
policy.AllowAttrs("class").Matching(regexp.MustCompile(`task-list-item`)).OnElements("li")
|
||||
|
||||
// Allow icons
|
||||
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^icon(\s+[\p{L}\p{N}_-]+)+$`)).OnElements("i")
|
||||
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^icon(\s+[\p{L}\p{N}_-]+)+$`)).OnElements("i")
|
||||
|
||||
// Allow unlabelled labels
|
||||
sanitizer.policy.AllowNoAttrs().OnElements("label")
|
||||
policy.AllowNoAttrs().OnElements("label")
|
||||
|
||||
// Allow classes for emojis
|
||||
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`emoji`)).OnElements("img")
|
||||
policy.AllowAttrs("class").Matching(regexp.MustCompile(`emoji`)).OnElements("img")
|
||||
|
||||
// Allow icons, emojis, chroma syntax and keyword markup on span
|
||||
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^((icon(\s+[\p{L}\p{N}_-]+)+)|(emoji))$|^([a-z][a-z0-9]{0,2})$|^` + keywordClass + `$`)).OnElements("span")
|
||||
|
||||
// Allow data tables
|
||||
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`data-table`)).OnElements("table")
|
||||
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`line-num`)).OnElements("th", "td")
|
||||
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^((icon(\s+[\p{L}\p{N}_-]+)+)|(emoji))$|^([a-z][a-z0-9]{0,2})$|^` + keywordClass + `$`)).OnElements("span")
|
||||
|
||||
// Allow generally safe attributes
|
||||
generalSafeAttrs := []string{"abbr", "accept", "accept-charset",
|
||||
|
|
@ -101,18 +112,29 @@ func ReplaceSanitizer() {
|
|||
"abbr", "bdo", "cite", "dfn", "mark", "small", "span", "time", "wbr",
|
||||
}
|
||||
|
||||
sanitizer.policy.AllowAttrs(generalSafeAttrs...).OnElements(generalSafeElements...)
|
||||
policy.AllowAttrs(generalSafeAttrs...).OnElements(generalSafeElements...)
|
||||
|
||||
sanitizer.policy.AllowAttrs("itemscope", "itemtype").OnElements("div")
|
||||
policy.AllowAttrs("itemscope", "itemtype").OnElements("div")
|
||||
|
||||
// FIXME: Need to handle longdesc in img but there is no easy way to do it
|
||||
|
||||
// Custom keyword markup
|
||||
for _, rule := range setting.ExternalSanitizerRules {
|
||||
if rule.Regexp != nil {
|
||||
sanitizer.policy.AllowAttrs(rule.AllowAttr).Matching(rule.Regexp).OnElements(rule.Element)
|
||||
} else {
|
||||
sanitizer.policy.AllowAttrs(rule.AllowAttr).OnElements(rule.Element)
|
||||
addSanitizerRules(policy, setting.ExternalSanitizerRules)
|
||||
|
||||
return policy
|
||||
}
|
||||
|
||||
func addSanitizerRules(policy *bluemonday.Policy, rules []setting.MarkupSanitizerRule) {
|
||||
for _, rule := range rules {
|
||||
if rule.AllowDataURIImages {
|
||||
policy.AllowDataURIImages()
|
||||
}
|
||||
if rule.Element != "" {
|
||||
if rule.Regexp != nil {
|
||||
policy.AllowAttrs(rule.AllowAttr).Matching(rule.Regexp).OnElements(rule.Element)
|
||||
} else {
|
||||
policy.AllowAttrs(rule.AllowAttr).OnElements(rule.Element)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -120,11 +142,15 @@ func ReplaceSanitizer() {
|
|||
// Sanitize takes a string that contains a HTML fragment or document and applies policy whitelist.
|
||||
func Sanitize(s string) string {
|
||||
NewSanitizer()
|
||||
return sanitizer.policy.Sanitize(s)
|
||||
return sanitizer.defaultPolicy.Sanitize(s)
|
||||
}
|
||||
|
||||
// SanitizeReader sanitizes a Reader
|
||||
func SanitizeReader(r io.Reader) *bytes.Buffer {
|
||||
func SanitizeReader(r io.Reader, renderer string) *bytes.Buffer {
|
||||
NewSanitizer()
|
||||
return sanitizer.policy.SanitizeReader(r)
|
||||
policy, exist := sanitizer.rendererPolicies[renderer]
|
||||
if !exist {
|
||||
policy = sanitizer.defaultPolicy
|
||||
}
|
||||
return policy.SanitizeReader(r)
|
||||
}
|
||||
|
|
|
|||
|
|
@ -15,31 +15,34 @@ import (
|
|||
|
||||
// ExternalMarkupRenderers represents the external markup renderers
|
||||
var (
|
||||
ExternalMarkupRenderers []MarkupRenderer
|
||||
ExternalMarkupRenderers []*MarkupRenderer
|
||||
ExternalSanitizerRules []MarkupSanitizerRule
|
||||
)
|
||||
|
||||
// MarkupRenderer defines the external parser configured in ini
|
||||
type MarkupRenderer struct {
|
||||
Enabled bool
|
||||
MarkupName string
|
||||
Command string
|
||||
FileExtensions []string
|
||||
IsInputFile bool
|
||||
NeedPostProcess bool
|
||||
Enabled bool
|
||||
MarkupName string
|
||||
Command string
|
||||
FileExtensions []string
|
||||
IsInputFile bool
|
||||
NeedPostProcess bool
|
||||
MarkupSanitizerRules []MarkupSanitizerRule
|
||||
}
|
||||
|
||||
// MarkupSanitizerRule defines the policy for whitelisting attributes on
|
||||
// certain elements.
|
||||
type MarkupSanitizerRule struct {
|
||||
Element string
|
||||
AllowAttr string
|
||||
Regexp *regexp.Regexp
|
||||
Element string
|
||||
AllowAttr string
|
||||
Regexp *regexp.Regexp
|
||||
AllowDataURIImages bool
|
||||
}
|
||||
|
||||
func newMarkup() {
|
||||
ExternalMarkupRenderers = make([]MarkupRenderer, 0, 10)
|
||||
ExternalMarkupRenderers = make([]*MarkupRenderer, 0, 10)
|
||||
ExternalSanitizerRules = make([]MarkupSanitizerRule, 0, 10)
|
||||
|
||||
for _, sec := range Cfg.Section("markup").ChildSections() {
|
||||
name := strings.TrimPrefix(sec.Name(), "markup.")
|
||||
if name == "" {
|
||||
|
|
@ -56,50 +59,62 @@ func newMarkup() {
|
|||
}
|
||||
|
||||
func newMarkupSanitizer(name string, sec *ini.Section) {
|
||||
haveElement := sec.HasKey("ELEMENT")
|
||||
haveAttr := sec.HasKey("ALLOW_ATTR")
|
||||
haveRegexp := sec.HasKey("REGEXP")
|
||||
rule, ok := createMarkupSanitizerRule(name, sec)
|
||||
if ok {
|
||||
if strings.HasPrefix(name, "sanitizer.") {
|
||||
names := strings.SplitN(strings.TrimPrefix(name, "sanitizer."), ".", 2)
|
||||
name = names[0]
|
||||
}
|
||||
for _, renderer := range ExternalMarkupRenderers {
|
||||
if name == renderer.MarkupName {
|
||||
renderer.MarkupSanitizerRules = append(renderer.MarkupSanitizerRules, rule)
|
||||
return
|
||||
}
|
||||
}
|
||||
ExternalSanitizerRules = append(ExternalSanitizerRules, rule)
|
||||
}
|
||||
}
|
||||
|
||||
if !haveElement && !haveAttr && !haveRegexp {
|
||||
log.Warn("Skipping empty section: markup.%s.", name)
|
||||
return
|
||||
func createMarkupSanitizerRule(name string, sec *ini.Section) (MarkupSanitizerRule, bool) {
|
||||
var rule MarkupSanitizerRule
|
||||
|
||||
ok := false
|
||||
if sec.HasKey("ALLOW_DATA_URI_IMAGES") {
|
||||
rule.AllowDataURIImages = sec.Key("ALLOW_DATA_URI_IMAGES").MustBool(false)
|
||||
ok = true
|
||||
}
|
||||
|
||||
if !haveElement || !haveAttr || !haveRegexp {
|
||||
log.Error("Missing required keys from markup.%s. Must have all three of ELEMENT, ALLOW_ATTR, and REGEXP defined!", name)
|
||||
return
|
||||
}
|
||||
if sec.HasKey("ELEMENT") || sec.HasKey("ALLOW_ATTR") {
|
||||
rule.Element = sec.Key("ELEMENT").Value()
|
||||
rule.AllowAttr = sec.Key("ALLOW_ATTR").Value()
|
||||
|
||||
elements := sec.Key("ELEMENT").Value()
|
||||
allowAttrs := sec.Key("ALLOW_ATTR").Value()
|
||||
regexpStr := sec.Key("REGEXP").Value()
|
||||
|
||||
if regexpStr == "" {
|
||||
rule := MarkupSanitizerRule{
|
||||
Element: elements,
|
||||
AllowAttr: allowAttrs,
|
||||
Regexp: nil,
|
||||
if rule.Element == "" || rule.AllowAttr == "" {
|
||||
log.Error("Missing required values from markup.%s. Must have ELEMENT and ALLOW_ATTR defined!", name)
|
||||
return rule, false
|
||||
}
|
||||
|
||||
ExternalSanitizerRules = append(ExternalSanitizerRules, rule)
|
||||
return
|
||||
regexpStr := sec.Key("REGEXP").Value()
|
||||
if regexpStr != "" {
|
||||
// Validate when parsing the config that this is a valid regular
|
||||
// expression. Then we can use regexp.MustCompile(...) later.
|
||||
compiled, err := regexp.Compile(regexpStr)
|
||||
if err != nil {
|
||||
log.Error("In markup.%s: REGEXP (%s) failed to compile: %v", name, regexpStr, err)
|
||||
return rule, false
|
||||
}
|
||||
|
||||
rule.Regexp = compiled
|
||||
}
|
||||
|
||||
ok = true
|
||||
}
|
||||
|
||||
// Validate when parsing the config that this is a valid regular
|
||||
// expression. Then we can use regexp.MustCompile(...) later.
|
||||
compiled, err := regexp.Compile(regexpStr)
|
||||
if err != nil {
|
||||
log.Error("In module.%s: REGEXP (%s) at definition %d failed to compile: %v", regexpStr, name, err)
|
||||
return
|
||||
if !ok {
|
||||
log.Error("Missing required keys from markup.%s. Must have ELEMENT and ALLOW_ATTR or ALLOW_DATA_URI_IMAGES defined!", name)
|
||||
return rule, false
|
||||
}
|
||||
|
||||
rule := MarkupSanitizerRule{
|
||||
Element: elements,
|
||||
AllowAttr: allowAttrs,
|
||||
Regexp: compiled,
|
||||
}
|
||||
|
||||
ExternalSanitizerRules = append(ExternalSanitizerRules, rule)
|
||||
return rule, true
|
||||
}
|
||||
|
||||
func newMarkupRenderer(name string, sec *ini.Section) {
|
||||
|
|
@ -126,7 +141,7 @@ func newMarkupRenderer(name string, sec *ini.Section) {
|
|||
return
|
||||
}
|
||||
|
||||
ExternalMarkupRenderers = append(ExternalMarkupRenderers, MarkupRenderer{
|
||||
ExternalMarkupRenderers = append(ExternalMarkupRenderers, &MarkupRenderer{
|
||||
Enabled: sec.Key("ENABLED").MustBool(false),
|
||||
MarkupName: name,
|
||||
FileExtensions: exts,
|
||||
|
|
|
|||
Loading…
Reference in New Issue