Cargo.lock

@@ -1380,6 +1380,7 @@ dependencies = [
  "derive-new",
  "futures",
  "lemmy_api_common",
+ "lemmy_db_schema",
  "log",
  "once_cell",
  "reqwest",

Cargo.toml

@@ -14,6 +14,7 @@ serde_json = "1.0.89"
 semver = "1.0.14"
 once_cell = "1.16.0"
 lemmy_api_common = "=0.16.0"
+lemmy_db_schema = "=0.16.0"
 async-recursion = "1.0.0"
 log = "0.4.17"
 derive-new = "0.5.9"

src/crawl.rs

@@ -1,11 +1,12 @@
+use crate::node_info::{NodeInfo, NodeInfoWellKnown};
 use crate::CLIENT;
-use anyhow::Error;
+use anyhow::{anyhow, Error};
 use async_recursion::async_recursion;
 use futures::future::join_all;
 use lemmy_api_common::site::GetSiteResponse;
 use log::debug;
+use reqwest::Url;
 use semver::Version;
-use serde::Serialize;
 use std::collections::HashSet;
 use std::ops::Deref;
 use std::sync::Arc;
@@ -26,15 +27,16 @@ pub struct CrawlParams {
     crawled_instances: Arc<Mutex<HashSet<String>>>,
 }
 
-#[derive(Serialize, Debug)]
-pub struct InstanceDetails {
+#[derive(Debug)]
+pub struct CrawlResult {
     pub domain: String,
-    pub site_info: GetSiteResponse,
+    pub node_info: NodeInfo,
+    pub site_info: Option<GetSiteResponse>,
 }
 
 impl CrawlJob {
     #[async_recursion]
-    pub async fn crawl(self) -> Vec<Result<InstanceDetails, Error>> {
+    pub async fn crawl(self) -> Vec<Result<CrawlResult, Error>> {
         // need to acquire and release mutex before recursing, otherwise it will deadlock
         {
             let mut crawled_instances = self.params.crawled_instances.deref().lock().await;
@@ -55,47 +57,79 @@ impl CrawlJob {
             "Starting crawl for {}, distance {}",
             &self.domain, &self.current_distance
         );
-        let site_info = match self.fetch_instance_details().await {
+        let (node_info, site_info) = match self.fetch_instance_details().await {
             Ok(o) => o,
             Err(e) => return vec![Err(e)],
         };
+        let mut crawl_result = CrawlResult {
+            domain: self.domain.clone(),
+            node_info,
+            site_info: None,
+        };
 
-        if site_info.1 < self.params.min_lemmy_version {
-            return vec![];
-        }
-
-        let mut result = vec![];
-        if let Some(federated) = &site_info.0.federated_instances {
-            for domain in federated.linked.iter() {
-                let crawl_job = CrawlJob::new(
-                    domain.clone(),
-                    self.current_distance + 1,
-                    self.params.clone(),
-                );
-                result.push(crawl_job.crawl());
+        if let Some(site_info) = site_info {
+            match Version::parse(&site_info.version) {
+                Ok(version) => {
+                    if version < self.params.min_lemmy_version {
+                        return vec![Ok(crawl_result)];
+                    }
+                }
+                Err(e) => return vec![Err(e.into())],
             }
+
+            let mut result = vec![];
+            if let Some(federated) = &site_info.federated_instances {
+                for domain in federated.linked.iter() {
+                    let crawl_job = CrawlJob::new(
+                        domain.clone(),
+                        self.current_distance + 1,
+                        self.params.clone(),
+                    );
+                    result.push(crawl_job.crawl());
+                }
+            }
+
+            let mut result2: Vec<Result<CrawlResult, Error>> =
+                join_all(result).await.into_iter().flatten().collect();
+            debug!("Successfully finished crawl for {}", &self.domain);
+            crawl_result.site_info = Some(site_info);
+            result2.push(Ok(crawl_result));
+
+            result2
+        } else {
+            vec![Ok(crawl_result)]
         }
-
-        let mut result2: Vec<Result<InstanceDetails, Error>> =
-            join_all(result).await.into_iter().flatten().collect();
-        debug!("Successfully finished crawl for {}", &self.domain);
-        result2.push(Ok(InstanceDetails {
-            domain: self.domain,
-            site_info: site_info.0,
-        }));
-
-        result2
     }
 
-    async fn fetch_instance_details(&self) -> Result<(GetSiteResponse, Version), Error> {
-        let site_info_url = format!("https://{}/api/v3/site", &self.domain);
+    async fn fetch_instance_details(&self) -> Result<(NodeInfo, Option<GetSiteResponse>), Error> {
+        let rel_node_info: Url = Url::parse("http://nodeinfo.diaspora.software/ns/schema/2.0")
+            .expect("parse nodeinfo relation url");
+        let node_info_well_known = CLIENT
+            .get(&format!("https://{}/.well-known/nodeinfo", &self.domain))
+            .send()
+            .await?
+            .json::<NodeInfoWellKnown>()
+            .await?;
+        let node_info_url = node_info_well_known
+            .links
+            .into_iter()
+            .find(|l| l.rel == rel_node_info)
+            .ok_or_else(|| anyhow!("failed to find nodeinfo link for {}", &self.domain))?
+            .href;
+        let node_info = CLIENT
+            .get(node_info_url)
+            .send()
+            .await?
+            .json::<NodeInfo>()
+            .await?;
+
         let site_info = CLIENT
-            .get(&site_info_url)
+            .get(&format!("https://{}/api/v3/site", &self.domain))
             .send()
             .await?
             .json::<GetSiteResponse>()
-            .await?;
-        let version = Version::parse(&site_info.version)?;
-        Ok((site_info, version))
+            .await
+            .ok();
+        Ok((node_info, site_info))
     }
 }

src/lib.rs

@@ -1,19 +1,23 @@
 #[macro_use]
 extern crate derive_new;
 
-use crate::crawl::{CrawlJob, CrawlParams, InstanceDetails};
+use crate::crawl::{CrawlJob, CrawlParams, CrawlResult};
+use crate::node_info::{NodeInfo, NodeInfoUsage, NodeInfoUsers};
 use anyhow::Error;
 use futures::future::join_all;
+use lemmy_api_common::site::GetSiteResponse;
 use log::warn;
 use once_cell::sync::Lazy;
 use reqwest::{Client, ClientBuilder};
 use semver::Version;
+use serde::Serialize;
 use std::collections::HashSet;
 use std::sync::Arc;
 use std::time::Duration;
 use tokio::sync::Mutex;
 
 pub mod crawl;
+mod node_info;
 
 const REQUEST_TIMEOUT: Duration = Duration::from_secs(10);
 
@@ -22,14 +26,21 @@ static CLIENT: Lazy<Client> = Lazy::new(|| {
         .timeout(REQUEST_TIMEOUT)
         .user_agent("lemmy-stats-crawler")
         .build()
-        .unwrap()
+        .expect("build reqwest client")
 });
 
+#[derive(Serialize, Debug)]
+pub struct CrawlResult2 {
+    pub domain: String,
+    pub site_info: GetSiteResponse,
+    pub federated_counts: Option<NodeInfoUsage>,
+}
+
 pub async fn start_crawl(
     start_instances: Vec<String>,
     exclude_domains: Vec<String>,
     max_distance: i32,
-) -> Result<Vec<InstanceDetails>, Error> {
+) -> Result<Vec<CrawlResult2>, Error> {
     let params = Arc::new(CrawlParams::new(
         min_lemmy_version().await?,
         exclude_domains,
@@ -42,8 +53,7 @@ pub async fn start_crawl(
         jobs.push(job.crawl());
     }
 
-    // TODO: log the errors
-    let mut instance_details: Vec<InstanceDetails> = join_all(jobs)
+    let crawl_results: Vec<CrawlResult> = join_all(jobs)
         .await
         .into_iter()
         .flatten()
@@ -52,20 +62,20 @@ pub async fn start_crawl(
                 warn!("{}", e)
             }
         })
-        .filter_map(|r| r.ok())
+        .filter_map(Result::ok)
         .collect();
+    let mut crawl_results = calculate_federated_site_aggregates(crawl_results)?;
 
     // Sort by active monthly users descending
-    instance_details.sort_unstable_by_key(|i| {
+    crawl_results.sort_unstable_by_key(|i| {
         i.site_info
             .site_view
             .as_ref()
             .map(|s| s.counts.users_active_month)
             .unwrap_or(0)
     });
-    instance_details.reverse();
-
-    Ok(instance_details)
+    crawl_results.reverse();
+    Ok(crawl_results)
 }
 
 /// calculate minimum allowed lemmy version based on current version. in case of current version
@@ -82,3 +92,47 @@ async fn min_lemmy_version() -> Result<Version, Error> {
     version.minor -= 1;
     Ok(version)
 }
+
+fn calculate_federated_site_aggregates(
+    crawl_results: Vec<CrawlResult>,
+) -> Result<Vec<CrawlResult2>, Error> {
+    let node_info: Vec<(String, NodeInfo)> = crawl_results
+        .iter()
+        .map(|c| (c.domain.clone(), c.node_info.clone()))
+        .collect();
+    let lemmy_instances: Vec<(String, GetSiteResponse)> = crawl_results
+        .into_iter()
+        .filter_map(|c| {
+            let domain = c.domain;
+            c.site_info.map(|c2| (domain, c2))
+        })
+        .collect();
+    let mut ret = vec![];
+    for instance in &lemmy_instances {
+        let federated_counts = if let Some(federated_instances) = &instance.1.federated_instances {
+            node_info
+                .iter()
+                .filter(|i| federated_instances.linked.contains(&i.0) || i.0 == instance.0)
+                .map(|i| i.1.usage.clone())
+                .reduce(|a, b| NodeInfoUsage {
+                    users: NodeInfoUsers {
+                        total: a.users.total + b.users.total,
+                        active_halfyear: a.users.active_halfyear + b.users.active_halfyear,
+                        active_month: a.users.active_month + b.users.active_month,
+                    },
+                    posts: a.posts + b.posts,
+                    comments: a.comments + b.comments,
+                })
+        } else {
+            None
+        };
+        // TODO: workaround because GetSiteResponse doesnt implement clone
+        let site_info = serde_json::from_str(&serde_json::to_string(&instance.1)?)?;
+        ret.push(CrawlResult2 {
+            domain: instance.0.clone(),
+            site_info,
+            federated_counts,
+        });
+    }
+    Ok(ret)
+}

src/main.rs

@@ -1,6 +1,5 @@
 use anyhow::Error;
-use lemmy_stats_crawler::crawl::InstanceDetails;
-use lemmy_stats_crawler::start_crawl;
+use lemmy_stats_crawler::{start_crawl, CrawlResult2};
 use serde::Serialize;
 use structopt::StructOpt;
 
@@ -57,10 +56,10 @@ struct TotalStats {
     users_active_week: i64,
     users_active_month: i64,
     users_active_halfyear: i64,
-    instance_details: Vec<InstanceDetails>,
+    instance_details: Vec<CrawlResult2>,
 }
 
-fn aggregate(instance_details: Vec<InstanceDetails>) -> TotalStats {
+fn aggregate(instance_details: Vec<CrawlResult2>) -> TotalStats {
     let mut online_users = 0;
     let mut total_users = 0;
     let mut users_active_day = 0;

src/node_info.rs

@@ -0,0 +1,47 @@
+use reqwest::Url;
+use serde::{Deserialize, Serialize};
+
+#[derive(Deserialize, Debug)]
+pub struct NodeInfoWellKnown {
+    pub links: Vec<NodeInfoWellKnownLinks>,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct NodeInfoWellKnownLinks {
+    pub rel: Url,
+    pub href: Url,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+#[serde(rename_all = "camelCase")]
+pub struct NodeInfo {
+    pub version: String,
+    pub software: NodeInfoSoftware,
+    pub protocols: Vec<String>,
+    pub usage: NodeInfoUsage,
+    pub open_registrations: bool,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct NodeInfoSoftware {
+    pub name: String,
+    pub version: String,
+}
+
+#[derive(Deserialize, Serialize, Debug, Clone, Default)]
+#[serde(rename_all = "camelCase", default)]
+pub struct NodeInfoUsage {
+    pub users: NodeInfoUsers,
+    #[serde(rename(deserialize = "localPosts"))]
+    pub posts: i64,
+    #[serde(rename(deserialize = "localComments"))]
+    pub comments: i64,
+}
+
+#[derive(Deserialize, Serialize, Debug, Clone, Default)]
+#[serde(rename_all = "camelCase", default)]
+pub struct NodeInfoUsers {
+    pub total: i64,
+    pub active_halfyear: i64,
+    pub active_month: i64,
+}