add support for data url images in markdown

fixes #803

Author: lovasoa

CHANGELOG.md

@@ -12,6 +12,7 @@
 - New configuration options:
   - `markdown_allow_dangerous_html`: allow the usage of html in markdown (default: false)
   - `markdown_allow_dangerous_protocol`: allow the usage of custom protocols in markdown (default: false)
+  - Allow data URLs in markdown images. This allows embedding base64 encoded images in any markdown field.
   - see [configuration.md](./configuration.md) for more details.
 - In the shell component, setting the `footer` parameter to the empty string (`''`) will now completely hide the footer, instead of showing the default one 
 

Cargo.toml

@@ -48,7 +48,7 @@ async-trait = "0.1.61"
 async-recursion = "1.0.0"
 include_dir = "0.7.2"
 config = { version = "0.15.4", features = ["json"] }
-markdown = { version = "1.0.0-alpha.22", features = ["log"] }
+markdown = { version = "1.0.0-alpha.23", features = ["log"] }
 password-hash = "0.5.0"
 argon2 = "0.5.0"
 actix-web-httpauth = "0.8.0"

src/template_helpers.rs

@@ -286,6 +286,7 @@ impl CanHelp for MarkdownHelper {
         let mut options = markdown::Options::gfm();
         options.compile.allow_dangerous_html = self.allow_dangerous_html;
         options.compile.allow_dangerous_protocol = self.allow_dangerous_protocol;
+        options.compile.allow_any_img_src = true;
         markdown::to_html_with_options(&as_str, &options)
             .map(JsonValue::String)
             .map_err(|e| e.to_string())