mirror of
https://github.com/LemmyNet/lemmy.git
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3a0c1dca90
* Dont allow federation to overwrite local objects * is_local check in apub lib * use imports * fix check, update lib * use verify_is_remote_object() * submodule
67 lines
1.9 KiB
Rust
67 lines
1.9 KiB
Rust
use crate::protocol::Source;
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use activitypub_federation::{
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config::Data,
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fetch::object_id::ObjectId,
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protocol::values::MediaTypeMarkdownOrHtml,
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traits::Object,
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};
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use anyhow::anyhow;
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use html2md::parse_html;
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use lemmy_api_common::context::LemmyContext;
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use lemmy_utils::error::LemmyResult;
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use serde::Deserialize;
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use std::fmt::Debug;
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pub mod comment;
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pub mod community;
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pub mod instance;
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pub mod person;
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pub mod post;
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pub mod private_message;
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pub(crate) fn read_from_string_or_source(
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content: &str,
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media_type: &Option<MediaTypeMarkdownOrHtml>,
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source: &Option<Source>,
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) -> String {
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if let Some(s) = source {
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// markdown sent by lemmy in source field
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s.content.clone()
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} else if media_type == &Some(MediaTypeMarkdownOrHtml::Markdown) {
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// markdown sent by peertube in content field
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content.to_string()
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} else {
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// otherwise, convert content html to markdown
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parse_html(content)
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}
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}
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pub(crate) fn read_from_string_or_source_opt(
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content: &Option<String>,
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media_type: &Option<MediaTypeMarkdownOrHtml>,
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source: &Option<Source>,
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) -> Option<String> {
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content
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.as_ref()
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.map(|content| read_from_string_or_source(content, media_type, source))
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}
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/// When for example a Post is made in a remote community, the community will send it back,
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/// wrapped in Announce. If we simply receive this like any other federated object, overwrite the
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/// existing, local Post. In particular, it will set the field local = false, so that the object
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/// can't be fetched from the Activitypub HTTP endpoint anymore (which only serves local objects).
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pub(crate) fn verify_is_remote_object<T>(
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id: &ObjectId<T>,
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context: &Data<LemmyContext>,
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) -> LemmyResult<()>
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where
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T: Object<DataType = LemmyContext> + Debug + Send + 'static,
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for<'de2> <T as Object>::Kind: Deserialize<'de2>,
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{
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if id.is_local(context) {
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Err(anyhow!("cant accept local object from remote instance").into())
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} else {
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Ok(())
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}
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}
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