Swap out iframely (#1706)

* Replace Iframely. Fixes #1681

* Add post_link_tags to nginx

* Adding post_link_tags route

* Cleaning up post_link_tags

* Changing PostLink to SiteMetadata, adding it to the API.

* Fixing issue when local has no openssl certs.

* Fixing an issue with pictrs errors

* Revert "Fixing issue when local has no openssl certs."

This reverts commit dbf7d1b1ee03846e5ef7b7156e618424f1150e1d.

* Add ca-certs to dockerfile for volume mount.

* Cleaning up fetch_pictrs request

* Changing to fetch_site_data

README.md

@@ -101,7 +101,6 @@ Each Lemmy server can set its own moderation policy; appointing site-wide admins
   - Can transfer site and communities to others.
 - Can fully erase your data, replacing all posts and comments.
 - NSFW post / community support.
-- OEmbed support via Iframely.
 - High performance.
   - Server is written in rust.
   - Front end is `~80kB` gzipped.

ansible/lemmy.yml

@@ -72,16 +72,12 @@
         - src: 'templates/nginx.conf'
           dest: '/etc/nginx/sites-enabled/lemmy.conf'
           mode: '0644'
-        - src: '../docker/iframely.config.local.js'
-          dest: '{{lemmy_base_dir}}/iframely.config.local.js'
-          mode: '0600'
       vars:
         lemmy_docker_image: "dessalines/lemmy:{{ lookup('file', 'VERSION') }}"
         lemmy_docker_ui_image: "dessalines/lemmy-ui:{{ lookup('file', 'VERSION') }}"
         lemmy_port: "8536"
         lemmy_ui_port: "1235"
         pictshare_port: "8537"
-        iframely_port: "8538"
 
     - name:  add config file (only during initial setup)
       template:

ansible/lemmy_dev.yml

@@ -61,16 +61,12 @@
         - src: 'templates/nginx.conf'
           dest: '/etc/nginx/sites-enabled/lemmy.conf'
           mode: '0644'
-        - src: '../docker/iframely.config.local.js'
-          dest: '{{lemmy_base_dir}}/iframely.config.local.js'
-          mode: '0600'
       vars:
         lemmy_docker_image: "dessalines/lemmy:dev"
         lemmy_docker_ui_image: "dessalines/lemmy-ui:{{ lookup('file', 'VERSION') }}"
         lemmy_port: "8536"
         lemmy_ui_port: "1235"
         pictshare_port: "8537"
-        iframely_port: "8538"
         postgres_password: "{{ lookup('password', 'passwords/{{ inventory_hostname }}/postgres chars=ascii_letters,digits') }}"
 
     - name:  add config file (only during initial setup)

ansible/templates/docker-compose.yml

@@ -13,7 +13,6 @@ services:
     depends_on:
       - postgres
       - pictrs
-      - iframely
 
   lemmy-ui:
     image: {{ lemmy_docker_ui_image }}
@@ -47,15 +46,6 @@ services:
     restart: always
     mem_limit: 200m
 
-  iframely:
-    image: dogbin/iframely:latest
-    ports:
-      - "127.0.0.1:8061:80"
-    volumes:
-      - ./iframely.config.local.js:/iframely/config.local.js:ro
-    restart: always
-    mem_limit: 200m
-
   postfix:
     image: mwader/postfix-relay
     environment:

ansible/templates/nginx.conf

@@ -101,12 +101,6 @@ server {
       return 301 /pictrs/image/$1;
     }
 
-    location /iframely/ {
-      proxy_pass http://0.0.0.0:8061/;
-      proxy_set_header X-Real-IP $remote_addr;
-      proxy_set_header Host $host;
-      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-    }
 }
 
 # Anonymize IP addresses

config/config.hjson

@@ -37,8 +37,6 @@
   jwt_secret: "changeme"
   # address where pictrs is available
   pictrs_url: "http://pictrs:8080"
-  # address where iframely is available
-  iframely_url: "http://iframely"
   # maximum length of local community and user names
   actor_name_max_length: 20
   # rate limits for various user actions, by user ip

crates/api/src/lib.rs

@@ -121,6 +121,9 @@ pub async fn match_websocket_operation(
     UserOperation::ResolvePostReport => {
       do_websocket_operation::<ResolvePostReport>(context, id, op, data).await
     }
+    UserOperation::GetSiteMetadata => {
+      do_websocket_operation::<GetSiteMetadata>(context, id, op, data).await
+    }
 
     // Comment ops
     UserOperation::MarkCommentAsRead => {

crates/api/src/post.rs

@@ -23,7 +23,7 @@ use lemmy_apub::{
 use lemmy_db_queries::{source::post::Post_, Crud, Likeable, Saveable};
 use lemmy_db_schema::source::{moderator::*, post::*};
 use lemmy_db_views::post_view::PostView;
-use lemmy_utils::{ApiError, ConnectionId, LemmyError};
+use lemmy_utils::{request::fetch_site_metadata, ApiError, ConnectionId, LemmyError};
 use lemmy_websocket::{send::send_post_ws_message, LemmyContext, UserOperation};
 use std::convert::TryInto;
 
@@ -285,3 +285,20 @@ impl Perform for SavePost {
     Ok(PostResponse { post_view })
   }
 }
+
+#[async_trait::async_trait(?Send)]
+impl Perform for GetSiteMetadata {
+  type Response = GetSiteMetadataResponse;
+
+  async fn perform(
+    &self,
+    context: &Data<LemmyContext>,
+    _websocket_id: Option<ConnectionId>,
+  ) -> Result<GetSiteMetadataResponse, LemmyError> {
+    let data: &Self = self;
+
+    let metadata = fetch_site_metadata(context.client(), &data.url).await?;
+
+    Ok(GetSiteMetadataResponse { metadata })
+  }
+}

crates/api_common/src/post.rs

@@ -8,6 +8,7 @@ use lemmy_db_views_actor::{
   community_moderator_view::CommunityModeratorView,
   community_view::CommunityView,
 };
+use lemmy_utils::request::SiteMetadata;
 use serde::{Deserialize, Serialize};
 use url::Url;
 
@@ -148,3 +149,13 @@ pub struct ListPostReports {
 pub struct ListPostReportsResponse {
   pub posts: Vec<PostReportView>,
 }
+
+#[derive(Deserialize, Debug)]
+pub struct GetSiteMetadata {
+  pub url: Url,
+}
+
+#[derive(Serialize, Clone, Debug)]
+pub struct GetSiteMetadataResponse {
+  pub metadata: SiteMetadata,
+}

crates/api_crud/src/post/create.rs

@@ -20,7 +20,7 @@ use lemmy_apub::{
 use lemmy_db_queries::{source::post::Post_, Crud, Likeable};
 use lemmy_db_schema::source::post::*;
 use lemmy_utils::{
-  request::fetch_iframely_and_pictrs_data,
+  request::fetch_site_data,
   utils::{check_slurs, check_slurs_opt, clean_url_params, is_valid_post_title},
   ApiError,
   ConnectionId,
@@ -49,11 +49,10 @@ impl PerformCrud for CreatePost {
 
     check_community_ban(local_user_view.person.id, data.community_id, context.pool()).await?;
 
-    // Fetch Iframely and pictrs cached image
+    // Fetch post links and pictrs cached image
     let data_url = data.url.as_ref();
-    let (iframely_response, pictrs_thumbnail) =
-      fetch_iframely_and_pictrs_data(context.client(), data_url).await?;
-    let (embed_title, embed_description, embed_html) = iframely_response
+    let (metadata_res, pictrs_thumbnail) = fetch_site_data(context.client(), data_url).await;
+    let (embed_title, embed_description, embed_html) = metadata_res
       .map(|u| (u.title, u.description, u.html))
       .unwrap_or((None, None, None));
 

crates/api_crud/src/post/update.rs

@@ -5,7 +5,7 @@ use lemmy_apub::activities::{post::create_or_update::CreateOrUpdatePost, CreateO
 use lemmy_db_queries::{source::post::Post_, Crud};
 use lemmy_db_schema::{naive_now, source::post::*};
 use lemmy_utils::{
-  request::fetch_iframely_and_pictrs_data,
+  request::fetch_site_data,
   utils::{check_slurs_opt, clean_url_params, is_valid_post_title},
   ApiError,
   ConnectionId,
@@ -49,11 +49,10 @@ impl PerformCrud for EditPost {
       return Err(ApiError::err("no_post_edit_allowed").into());
     }
 
-    // Fetch Iframely and Pictrs cached image
+    // Fetch post links and Pictrs cached image
     let data_url = data.url.as_ref();
-    let (iframely_response, pictrs_thumbnail) =
-      fetch_iframely_and_pictrs_data(context.client(), data_url).await?;
-    let (embed_title, embed_description, embed_html) = iframely_response
+    let (metadata_res, pictrs_thumbnail) = fetch_site_data(context.client(), data_url).await;
+    let (embed_title, embed_description, embed_html) = metadata_res
       .map(|u| (u.title, u.description, u.html))
       .unwrap_or((None, None, None));
 

crates/apub/src/objects/post.rs

@@ -31,7 +31,7 @@ use lemmy_db_schema::{
   },
 };
 use lemmy_utils::{
-  request::fetch_iframely_and_pictrs_data,
+  request::fetch_site_data,
   utils::{check_slurs, convert_datetime, markdown_to_html, remove_slurs},
   LemmyError,
 };
@@ -188,12 +188,12 @@ impl FromApub for Post {
     let community = extract_community(&page.to, context, request_counter).await?;
 
     let thumbnail_url: Option<Url> = page.image.clone().map(|i| i.url);
-    let (iframely_response, pictrs_thumbnail) = if let Some(url) = &page.url {
-      fetch_iframely_and_pictrs_data(context.client(), Some(url)).await?
+    let (metadata_res, pictrs_thumbnail) = if let Some(url) = &page.url {
+      fetch_site_data(context.client(), Some(url)).await
     } else {
       (None, thumbnail_url)
     };
-    let (embed_title, embed_description, embed_html) = iframely_response
+    let (embed_title, embed_description, embed_html) = metadata_res
       .map(|u| (u.title, u.description, u.html))
       .unwrap_or((None, None, None));
 

crates/utils/Cargo.toml

@@ -38,3 +38,4 @@ http = "0.2.4"
 jsonwebtoken = "7.2.0"
 deser-hjson = "1.0.2"
 smart-default = "0.6.0"
+webpage = { version = "1.1", default-features = false, features = ["serde"] }

crates/utils/src/request.rs

@@ -3,10 +3,11 @@ use anyhow::anyhow;
 use log::error;
 use percent_encoding::{utf8_percent_encode, NON_ALPHANUMERIC};
 use reqwest::Client;
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 use std::future::Future;
 use thiserror::Error;
 use url::Url;
+use webpage::HTML;
 
 #[derive(Clone, Debug, Error)]
 #[error("Error sending request, {0}")]
@@ -47,31 +48,61 @@ where
   response.expect("retry http request")
 }
 
-#[derive(Deserialize, Debug)]
-pub struct IframelyResponse {
+#[derive(Deserialize, Serialize, Debug, PartialEq, Clone)]
+pub struct SiteMetadata {
   pub title: Option<String>,
   pub description: Option<String>,
-  thumbnail_url: Option<Url>,
+  image: Option<Url>,
   pub html: Option<String>,
 }
 
-pub(crate) async fn fetch_iframely(
-  client: &Client,
-  url: &Url,
-) -> Result<IframelyResponse, LemmyError> {
-  if let Some(iframely_url) = Settings::get().iframely_url {
-    let fetch_url = format!("{}/oembed?url={}", iframely_url, url);
+/// Fetches the post link html tags (like title, description, image, etc)
+pub async fn fetch_site_metadata(client: &Client, url: &Url) -> Result<SiteMetadata, LemmyError> {
+  let response = retry(|| client.get(url.as_str()).send()).await?;
 
-    let response = retry(|| client.get(&fetch_url).send()).await?;
-
-    let res: IframelyResponse = response
-      .json()
+  let html = response
+    .text()
     .await
     .map_err(|e| RecvError(e.to_string()))?;
-    Ok(res)
-  } else {
-    Err(anyhow!("Missing Iframely URL in config.").into())
+
+  let tags = html_to_site_metadata(&html)?;
+
+  Ok(tags)
 }
+
+fn html_to_site_metadata(html: &str) -> Result<SiteMetadata, LemmyError> {
+  let page = HTML::from_string(html.to_string(), None)?;
+
+  let page_title = page.title;
+  let page_description = page.description;
+
+  let og_description = page
+    .opengraph
+    .properties
+    .get("description")
+    .map(|t| t.to_string());
+  let og_title = page
+    .opengraph
+    .properties
+    .get("title")
+    .map(|t| t.to_string());
+  let og_image = page
+    .opengraph
+    .images
+    .get(0)
+    .map(|ogo| Url::parse(&ogo.url).ok())
+    .flatten();
+
+  let title = og_title.or(page_title);
+  let description = og_description.or(page_description);
+  let image = og_image;
+
+  Ok(SiteMetadata {
+    title,
+    description,
+    image,
+    html: None,
+  })
 }
 
 #[derive(Deserialize, Debug, Clone)]
@@ -89,7 +120,7 @@ pub(crate) struct PictrsFile {
 pub(crate) async fn fetch_pictrs(
   client: &Client,
   image_url: &Url,
-) -> Result<Option<PictrsResponse>, LemmyError> {
+) -> Result<PictrsResponse, LemmyError> {
   if let Some(pictrs_url) = Settings::get().pictrs_url {
     is_image_content_type(client, image_url).await?;
 
@@ -107,37 +138,44 @@ pub(crate) async fn fetch_pictrs(
       .map_err(|e| RecvError(e.to_string()))?;
 
     if response.msg == "ok" {
-      Ok(Some(response))
+      Ok(response)
     } else {
       Err(anyhow!("{}", &response.msg).into())
     }
   } else {
-    Ok(None)
+    Err(anyhow!("pictrs_url not set up in config").into())
   }
 }
 
-pub async fn fetch_iframely_and_pictrs_data(
+/// Both are options, since the URL might be either an html page, or an image
+/// Returns the SiteMetadata, and a Pictrs URL, if there is a picture associated
+pub async fn fetch_site_data(
   client: &Client,
   url: Option<&Url>,
-) -> Result<(Option<IframelyResponse>, Option<Url>), LemmyError> {
+) -> (Option<SiteMetadata>, Option<Url>) {
   match &url {
     Some(url) => {
-      // Fetch iframely data
-      let iframely_res_option = fetch_iframely(client, url).await.ok();
+      // Fetch metadata
+      // Ignore errors, since it may be an image, or not have the data.
+      // Warning, this may ignore SSL errors
+      let metadata_option = fetch_site_metadata(client, url).await.ok();
 
       // Fetch pictrs thumbnail
-      let pictrs_hash = match &iframely_res_option {
-        Some(iframely_res) => match &iframely_res.thumbnail_url {
-          Some(iframely_thumbnail_url) => fetch_pictrs(client, iframely_thumbnail_url)
-            .await?
+      let pictrs_hash = match &metadata_option {
+        Some(metadata_res) => match &metadata_res.image {
+          // Metadata, with image
+          // Try to generate a small thumbnail if there's a full sized one from post-links
+          Some(metadata_image) => fetch_pictrs(client, metadata_image)
+            .await
             .map(|r| r.files[0].file.to_owned()),
-          // Try to generate a small thumbnail if iframely is not supported
+          // Metadata, but no image
           None => fetch_pictrs(client, url)
-            .await?
+            .await
             .map(|r| r.files[0].file.to_owned()),
         },
+        // No metadata, try to fetch the URL as an image
         None => fetch_pictrs(client, url)
-          .await?
+          .await
           .map(|r| r.files[0].file.to_owned()),
       };
 
@@ -151,11 +189,12 @@ pub async fn fetch_iframely_and_pictrs_data(
           ))
           .ok()
         })
+        .ok()
         .flatten();
 
-      Ok((iframely_res_option, pictrs_thumbnail))
+      (metadata_option, pictrs_thumbnail)
     }
-    None => Ok((None, None)),
+    None => (None, None),
   }
 }
 
@@ -176,12 +215,35 @@ async fn is_image_content_type(client: &Client, test: &Url) -> Result<(), LemmyE
 
 #[cfg(test)]
 mod tests {
+  use crate::request::fetch_site_metadata;
+  use url::Url;
+
+  use super::SiteMetadata;
+
   // These helped with testing
-  // #[test]
-  // fn test_iframely() {
-  //   let res = fetch_iframely(client, "https://www.redspark.nu/?p=15341").await;
-  //   assert!(res.is_ok());
-  // }
+  #[actix_rt::test]
+  async fn test_site_metadata() {
+    let client = reqwest::Client::default();
+    let sample_url = Url::parse("https://www.redspark.nu/en/peoples-war/district-leader-of-chand-led-cpn-arrested-in-bhojpur/").unwrap();
+    let sample_res = fetch_site_metadata(&client, &sample_url).await.unwrap();
+    assert_eq!(
+      SiteMetadata {
+        title: Some("District Leader Of Chand Led CPN Arrested In Bhojpur - Redspark".to_string()),
+        description: Some("BHOJPUR: A district leader of the outlawed Netra Bikram Chand alias Biplav-led outfit has been arrested. According to District Police".to_string()),
+        image: Some(Url::parse("https://www.redspark.nu/wp-content/uploads/2020/03/netra-bikram-chand-attends-program-1272019033653-1000x0-845x653-1.jpg").unwrap()),
+        html: None,
+      }, sample_res);
+
+    let youtube_url = Url::parse("https://www.youtube.com/watch?v=IquO_TcMZIQ").unwrap();
+    let youtube_res = fetch_site_metadata(&client, &youtube_url).await.unwrap();
+    assert_eq!(
+      SiteMetadata {
+        title: Some("A Hard Look at Rent and Rent Seeking with Michael Hudson & Pepe Escobar".to_string()),
+        description: Some("An interactive discussion on wealth inequality and the “Great Game” on the control of natural resources.In this webinar organized jointly by the Henry George...".to_string()),
+        image: Some(Url::parse("https://i.ytimg.com/vi/IquO_TcMZIQ/maxresdefault.jpg").unwrap()),
+        html: None,
+      }, youtube_res);
+  }
 
   // #[test]
   // fn test_pictshare() {

crates/utils/src/settings/structs.rs

@@ -29,8 +29,6 @@ pub struct Settings {
   #[default(None)]
   pub pictrs_url: Option<String>,
   #[default(None)]
-  pub iframely_url: Option<String>,
-  #[default(None)]
   pub additional_slurs: Option<String>,
   #[default(20)]
   pub actor_name_max_length: usize,

crates/websocket/src/lib.rs

@@ -125,6 +125,7 @@ pub enum UserOperation {
   CommunityJoin,
   ModJoin,
   ChangePassword,
+  GetSiteMetadata,
 }
 
 #[derive(EnumString, ToString, Debug, Clone)]

docker/dev/docker-compose.yml

@@ -14,7 +14,6 @@ services:
     depends_on: 
       - pictrs
       - postgres
-      - iframely
 
   lemmy-ui:
     image: dessalines/lemmy-ui:dev
@@ -49,12 +48,3 @@ services:
     volumes:
       - ./volumes/pictrs:/mnt
     restart: always
-
-  iframely:
-    image: dogbin/iframely:latest
-    ports:
-      - "8061:80"
-    volumes:
-      - ../iframely.config.local.js:/iframely/config.local.js:ro
-    restart: always
-    mem_limit: 200m

docker/dev/volume_mount.dockerfile

@@ -22,7 +22,7 @@ FROM ubuntu:20.10
 
 # Install libpq for postgres
 RUN apt-get update -y
-RUN apt-get install -y libpq-dev
+RUN apt-get install -y libpq-dev ca-certificates
 
 # Copy resources
 COPY --from=rust /app/lemmy_server /app/lemmy

docker/federation/docker-compose.yml

@@ -14,7 +14,6 @@ services:
     restart: on-failure
     depends_on:
       - pictrs
-      - iframely
       - lemmy-alpha-ui
       - lemmy-beta-ui
       - lemmy-gamma-ui
@@ -174,9 +173,3 @@ services:
       - POSTGRES_DB=lemmy
     volumes:
       - ./volumes/postgres_epsilon:/var/lib/postgresql/data
-
-  iframely:
-    image: dogbin/iframely:latest
-    volumes:
-      - ../iframely.config.local.js:/iframely/config.local.js:ro
-    restart: always

docker/federation/nginx.conf

@@ -40,12 +40,6 @@ http {
             # Cuts off the trailing slash on URLs to make them valid
             rewrite ^(.+)/+$ $1 permanent;
         }
-        location /iframely/ {
-            proxy_pass http://iframely:80/;
-            proxy_set_header X-Real-IP $remote_addr;
-            proxy_set_header Host $host;
-            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        }
     }
 
     upstream lemmy-beta {
@@ -85,12 +79,6 @@ http {
             # Cuts off the trailing slash on URLs to make them valid
             rewrite ^(.+)/+$ $1 permanent;
         }
-        location /iframely/ {
-            proxy_pass http://iframely:80/;
-            proxy_set_header X-Real-IP $remote_addr;
-            proxy_set_header Host $host;
-            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        }
     }
 
     upstream lemmy-gamma {
@@ -130,12 +118,6 @@ http {
             # Cuts off the trailing slash on URLs to make them valid
             rewrite ^(.+)/+$ $1 permanent;
         }
-        location /iframely/ {
-            proxy_pass http://iframely:80/;
-            proxy_set_header X-Real-IP $remote_addr;
-            proxy_set_header Host $host;
-            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        }
     }
 
     upstream lemmy-delta {
@@ -175,12 +157,6 @@ http {
             # Cuts off the trailing slash on URLs to make them valid
             rewrite ^(.+)/+$ $1 permanent;
         }
-        location /iframely/ {
-            proxy_pass http://iframely:80/;
-            proxy_set_header X-Real-IP $remote_addr;
-            proxy_set_header Host $host;
-            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        }
     }
 
     upstream lemmy-epsilon {
@@ -220,11 +196,5 @@ http {
             # Cuts off the trailing slash on URLs to make them valid
             rewrite ^(.+)/+$ $1 permanent;
         }
-        location /iframely/ {
-            proxy_pass http://iframely:80/;
-            proxy_set_header X-Real-IP $remote_addr;
-            proxy_set_header Host $host;
-            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        }
     }
 }

docker/iframely.config.local.js

@@ -1,283 +0,0 @@
-(function() {
-    var config = {
-
-        // Specify a path for custom plugins. Custom plugins will override core plugins.
-        // CUSTOM_PLUGINS_PATH: __dirname + '/yourcustom-plugin-folder',
-
-        DEBUG: false,
-        RICH_LOG_ENABLED: false,
-
-        // For embeds that require render, baseAppUrl will be used as the host.
-        baseAppUrl: "http://yourdomain.com",
-        relativeStaticUrl: "/r",
-
-        // Or just skip built-in renders altogether
-        SKIP_IFRAMELY_RENDERS: true,
-
-        // For legacy reasons the response format of Iframely open-source is
-        // different by default as it does not group the links array by rel.
-        // In order to get the same grouped response as in Cloud API,
-        // add `&group=true` to your request to change response per request
-        // or set `GROUP_LINKS` in your config to `true` for a global change.
-        GROUP_LINKS: true,
-
-        // Number of maximum redirects to follow before aborting the page
-        // request with `redirect loop` error.
-        MAX_REDIRECTS: 4,
-
-        SKIP_OEMBED_RE_LIST: [
-            // /^https?:\/\/yourdomain\.com\//,
-        ],
-
-        /*
-        // Used to pass parameters to the generate functions when creating HTML elements
-        // disableSizeWrapper: Don't wrap element (iframe, video, etc) in a positioned div
-        GENERATE_LINK_PARAMS: {
-            disableSizeWrapper: true
-        },
-        */
-
-        port: 80, //can be overridden by PORT env var
-        host: '0.0.0.0',    // Dockers beware. See https://github.com/itteco/iframely/issues/132#issuecomment-242991246
-                            //can be overridden by HOST env var
-
-        // Optional SSL cert, if you serve under HTTPS.
-        /*
-        ssl: {
-            key: require('fs').readFileSync(__dirname + '/key.pem'),
-            cert: require('fs').readFileSync(__dirname + '/cert.pem'),
-            port: 443
-        },
-        */
-
-        /*
-        Supported cache engines:
-        - no-cache - no caching will be used.
-        - node-cache - good for debug, node memory will be used (https://github.com/tcs-de/nodecache).
-        - redis - https://github.com/mranney/node_redis.
-        - memcached - https://github.com/3rd-Eden/node-memcached
-        */
-        CACHE_ENGINE: 'node-cache',
-        CACHE_TTL: 0, // In seconds.
-        // 0 = 'never expire' for memcached & node-cache to let cache engine decide itself when to evict the record
-        // 0 = 'no cache' for redis. Use high enough (e.g. 365*24*60*60*1000) ttl for similar 'never expire' approach instead
-
-        /*
-        // Redis cache options.
-        REDIS_OPTIONS: {
-            host: '127.0.0.1',
-            port: 6379
-        },
-        */
-
-        /*
-        // Memcached options. See https://github.com/3rd-Eden/node-memcached#server-locations
-        MEMCACHED_OPTIONS: {
-            locations: "127.0.0.1:11211"
-        }
-        */
-
-        /*
-        // Access-Control-Allow-Origin list.
-        allowedOrigins: [
-            "*",
-            "http://another_domain.com"
-        ],
-        */
-
-        /*
-        // Uncomment to enable plugin testing framework.
-        tests: {
-            mongodb: 'mongodb://localhost:27017/iframely-tests',
-            single_test_timeout: 10 * 1000,
-            plugin_test_period: 2 * 60 * 60 * 1000,
-            relaunch_script_period: 5 * 60 * 1000
-        },
-        */
-
-        // If there's no response from remote server, the timeout will occur after
-        RESPONSE_TIMEOUT: 5 * 1000, //ms
-
-        /* From v1.4.0, Iframely supports HTTP/2 by default. Disable it, if you'd rather not.
-           Alternatively, you can also disable per origin. See `proxy` option below.
-        */
-        // DISABLE_HTTP2: true,
-
-        // Customize API calls to oembed endpoints.
-        ADD_OEMBED_PARAMS: [{
-            // Endpoint url regexp array.
-            re: [/^http:\/\/api\.instagram\.com\/oembed/],
-            // Custom get params object.
-            params: {
-                hidecaption: true
-            }
-        }, {
-            re: [/^https:\/\/www\.facebook\.com\/plugins\/page\/oembed\.json/i],
-            params: {
-                show_posts: 0,
-                show_facepile: 0,
-                maxwidth: 600
-            }
-        }, {
-            // match i=user or i=moment or i=timeline to configure these types invidually
-            // see params spec at https://dev.twitter.com/web/embedded-timelines/oembed
-            re: [/^https?:\/\/publish\.twitter\.com\/oembed\?i=user/i],
-            params: {
-                limit: 1,
-                maxwidth: 600
-            }
-        /*
-        }, {
-            // Facebook https://developers.facebook.com/docs/plugins/oembed-endpoints
-            re: [/^https:\/\/www\.facebook\.com\/plugins\/\w+\/oembed\.json/i],
-            params: {
-                // Skip script tag and fb-root div.
-                omitscript: true
-            }
-        */
-         }],
-
-        /*
-        // Configure use of HTTP proxies as needed.
-        // You don't have to specify all options per regex - just what you need to override
-        PROXY: [{
-            re: [/^https?:\/\/www\.domain\.com/],
-            proxy_server: 'http://1.2.3.4:8080',
-            user_agent: 'CHANGE YOUR AGENT',
-            headers: {
-                // HTTP headers
-                // Overrides previous params if overlapped.
-            },
-            request_options: {
-                // Refer to: https://github.com/request/request
-                // Overrides previous params if overlapped.
-            },
-            disable_http2: true
-        }],
-        */
-
-        // Customize API calls to 3rd parties. At the very least - configure required keys.
-        providerOptions: {
-            locale: "en_US",    // ISO 639-1 two-letter language code, e.g. en_CA or fr_CH.
-                                // Will be added as highest priotity in accept-language header with each request.
-                                // Plus is used in FB, YouTube and perhaps other plugins
-            "twitter": {
-                "max-width": 550,
-                "min-width": 250,
-                hide_media: false,
-                hide_thread: false,
-                omit_script: false,
-                center: false,
-                // dnt: true,
-                cache_ttl: 100 * 365 * 24 * 3600 // 100 Years.
-            },
-            readability: {
-                enabled: false
-                // allowPTagDescription: true  // to enable description fallback to first paragraph
-            },
-            images: {
-                loadSize: false, // if true, will try an load first bytes of all images to get/confirm the sizes
-                checkFavicon: false // if true, will verify all favicons
-            },
-            tumblr: {
-                consumer_key: "INSERT YOUR VALUE"
-                // media_only: true     // disables status embeds for images and videos - will return plain media
-            },
-            google: {
-                // https://developers.google.com/maps/documentation/embed/guide#api_key
-                maps_key: "INSERT YOUR VALUE"
-            },
-
-            /*
-            // Optional Camo Proxy to wrap all images: https://github.com/atmos/camo
-            camoProxy: {
-                camo_proxy_key: "INSERT YOUR VALUE",
-                camo_proxy_host: "INSERT YOUR VALUE"
-                // ssl_only: true // will only proxy non-ssl images
-            },
-            */
-
-            // List of query parameters to add to YouTube and Vimeo frames
-            // Start it with leading "?". Or omit alltogether for default values
-            // API key is optional, youtube will work without it too.
-            // It is probably the same API key you use for Google Maps.
-            youtube: {
-                // api_key: "INSERT YOUR VALUE",
-                get_params: "?rel=0&showinfo=1"     // https://developers.google.com/youtube/player_parameters
-            },
-            vimeo: {
-                get_params: "?byline=0&badge=0"     // https://developer.vimeo.com/player/embedding
-            },
-
-            /*
-            soundcloud: {
-                old_player: true // enables classic player
-            },
-            giphy: {
-                media_only: true // disables branded player for gifs and returns just the image
-            }
-            */
-            /*
-            bandcamp: {
-                get_params: '/size=large/bgcol=333333/linkcol=ffffff/artwork=small/transparent=true/',
-                media: {
-                    album: {
-                        height: 472,
-                        'max-width': 700
-                    },
-                    track: {
-                        height: 120,
-                        'max-width': 700
-                    }
-                }
-            }
-            */
-        },
-
-        // WHITELIST_WILDCARD, if present, will be added to whitelist as record for top level domain: "*"
-        // with it, you can define what parsers do when they run accross unknown publisher.
-        // If absent or empty, all generic media parsers will be disabled except for known domains
-        // More about format: https://iframely.com/docs/qa-format
-
-        /*
-        WHITELIST_WILDCARD: {
-              "twitter": {
-                "player": "allow",
-                "photo": "deny"
-              },
-              "oembed": {
-                "video": "allow",
-                "photo": "allow",
-                "rich": "deny",
-                "link": "deny"
-              },
-              "og": {
-                "video": ["allow", "ssl", "responsive"]
-              },
-              "iframely": {
-                "survey": "allow",
-                "reader": "allow",
-                "player": "allow",
-                "image": "allow"
-              },
-              "html-meta": {
-                "video": ["allow", "responsive"],
-                "promo": "allow"
-              }
-        }
-        */
-
-        // Black-list any of the inappropriate domains. Iframely will return 417
-        // At minimum, keep your localhosts blacklisted to avoid SSRF
-        BLACKLIST_DOMAINS_RE: [
-            /^https?:\/\/127\.0\.0\.1/i,
-            /^https?:\/\/localhost/i,
-
-            // And this is AWS metadata service
-            // https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html
-            /^https?:\/\/169\.254\.169\.254/
-        ]
-    };
-
-    module.exports = config;
-})();

docker/lemmy.hjson

@@ -20,6 +20,8 @@
   # json web token for authorization between server and client
   jwt_secret: "changeme"
   # settings related to the postgresql database
+  # address where pictrs is available
+  pictrs_url: "http://pictrs:8080"
   database: {
     # name of the postgres database for lemmy
     database: "lemmy"

docker/prod/docker-compose.yml

@@ -23,7 +23,6 @@ services:
     depends_on:
       - postgres
       - pictrs
-      - iframely
 
   lemmy-ui:
     image: dessalines/lemmy-ui:0.11.3
@@ -46,11 +45,3 @@ services:
       - ./volumes/pictrs:/mnt
     restart: always
 
-  iframely:
-    image: dogbin/iframely:latest
-    ports:
-      - "127.0.0.1:8061:80"
-    volumes:
-      - ./iframely.config.local.js:/iframely/config.local.js:ro
-    restart: always
-    mem_limit: 200m

src/api_routes.rs

@@ -88,7 +88,11 @@ pub fn config(cfg: &mut web::ServiceConfig, rate_limit: &RateLimit) {
             "/report/resolve",
             web::put().to(route_post::<ResolvePostReport>),
           )
-          .route("/report/list", web::get().to(route_get::<ListPostReports>)),
+          .route("/report/list", web::get().to(route_get::<ListPostReports>))
+          .route(
+            "/site_metadata",
+            web::get().to(route_get::<GetSiteMetadata>),
+          ),
       )
       // Comment
       .service(

src/main.rs

@@ -66,6 +66,7 @@ async fn main() -> Result<(), LemmyError> {
   );
 
   let activity_queue = create_activity_queue();
+
   let chat_server = ChatServer::startup(
     pool.clone(),
     rate_limiter.clone(),