domi/forgejo-domi
1
0
Fork 0
forked from forgejo/forgejo
Code Pull requests Activity

Allow render HTML with css/js external links (#19017)

Browse source 
* Allow render HTML with css/js external links

* Fix bug because of filename escape chars

* Fix lint

* Update docs about new configuration item

* Fix bug of render HTML in sub directory

* Add CSP head for displaying iframe in rendering file

* Fix test

* Apply suggestions from code review

Co-authored-by: delvh <dev.lh@web.de>

* Some improvements

* some improvement

* revert change in SanitizerDisabled of external renderer

* Add sandbox for iframe and support allow-scripts and allow-same-origin

* refactor

* fix

* fix lint

* fine tune

* use single option RENDER_CONTENT_MODE, use sandbox=allow-scripts

* fine tune CSP

* Apply suggestions from code review

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
Lunny Xiao 2022-06-16 11:33:23 +08:00 • committed by GitHub
parent 7d1770cd71
commit b01dce2a6e
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
17 changed files with 248 additions and 93 deletions
Download patch file Download diff file Expand all files Collapse all files

7
docs/content/doc/advanced/config-cheat-sheet.en-us.md
View file

@ -1026,13 +1026,16 @@ IS_INPUT_FILE = false
command. Multiple extensions needs a comma as splitter.
- RENDER\_COMMAND: External command to render all matching extensions.
- IS\_INPUT\_FILE: **false** Input is not a standard input but a file param followed `RENDER_COMMAND`.
- DISABLE_SANITIZER: **false** Don't filter html tags and attributes if true. Don't change this to true except you know what that means.
- RENDER_CONTENT_MODE: **sanitized** How the content will be rendered.
- sanitized: Sanitize the content and render it inside current page, default to only allow a few HTML tags and attributes. Customized sanitizer rules can be defined in `[markup.sanitizer.*]`.
- no-sanitizer: Disable the sanitizer and render the content inside current page. It's **insecure** and may lead to XSS attack if the content contains malicious code.
- iframe: Render the content in a separate standalone page and embed it into current page by iframe. The iframe is in sandbox mode with same-origin disabled, and the JS code are safely isolated from parent page.
Two special environment variables are passed to the render command:
- `GITEA_PREFIX_SRC`, which contains the current URL prefix in the `src` path tree. To be used as prefix for links.
- `GITEA_PREFIX_RAW`, which contains the current URL prefix in the `raw` path tree. To be used as prefix for image paths.
If `DISABLE_SANITIZER` is false, Gitea supports customizing the sanitization policy for rendered HTML. The example below will support KaTeX output from pandoc.
If `RENDER_CONTENT_MODE` is `sanitized`, Gitea supports customizing the sanitization policy for rendered HTML. The example below will support KaTeX output from pandoc.
```ini
[markup.sanitizer.TeX]

7
docs/content/doc/advanced/config-cheat-sheet.zh-cn.md
View file

@ -318,14 +318,17 @@ IS_INPUT_FILE = false
- FILE_EXTENSIONS: 关联的文档的扩展名，多个扩展名用都好分隔。
- RENDER_COMMAND: 工具的命令行命令及参数。
- IS_INPUT_FILE: 输入方式是最后一个参数为文件路径还是从标准输入读取。
- DISABLE_SANITIZER: **false** 如果为 true 则不过滤 HTML 标签和属性。除非你知道这意味着什么，否则不要设置为 true。
- RENDER_CONTENT_MODE: **sanitized** 内容如何被渲染。
- sanitized: 对内容进行净化并渲染到当前页面中，仅有一部分 HTML 标签和属性是被允许的。
- no-sanitizer: 禁用净化器，把内容渲染到当前页面中。此模式是**不安全**的，如果内容中含有恶意代码，可能会导致 XSS 攻击。
- iframe: 把内容渲染在一个独立的页面中并使用 iframe 嵌入到当前页面中。使用的 iframe 工作在沙箱模式并禁用了同源请求，JS 代码被安全的从父页面中隔离出去。
以下两个环境变量将会被传递给渲染命令：
- `GITEA_PREFIX_SRC`：包含当前的`src`路径的URL前缀，可以被用于链接的前缀。
- `GITEA_PREFIX_RAW`：包含当前的`raw`路径的URL前缀，可以被用于图片的前缀。
如果 `DISABLE_SANITIZER` 为 false，则 Gitea 支持自定义渲染 HTML 的净化策略。以下例子将用 pandoc 支持 KaTeX 输出。
如果 `RENDER_CONTENT_MODE` 为 `sanitized`，则 Gitea 支持自定义渲染 HTML 的净化策略。以下例子将用 pandoc 支持 KaTeX 输出。
```ini
[markup.sanitizer.TeX]