Browse Source

Add max depth parameter for crawl

pull/6/head
Felix Ableitner 11 months ago
parent
commit
f01e077020
  1. 139
      src/crawl.rs
  2. 3
      src/lib.rs
  3. 8
      src/main.rs

139
src/crawl.rs

@ -1,79 +1,102 @@
use anyhow::Error;
use futures::try_join;
use crate::federated_instances::GetSiteResponse;
use crate::node_info::NodeInfo;
use crate::REQUEST_TIMEOUT;
use anyhow::Error;
use futures::try_join;
use reqwest::Client;
use serde::Serialize;
use std::collections::VecDeque;
use crate::REQUEST_TIMEOUT;
pub async fn crawl(start_instances: Vec<String>) -> Result<Vec<InstanceDetails>, Error> {
let mut pending_instances = VecDeque::from(start_instances);
let mut crawled_instances = vec![];
let mut instance_details = vec![];
while let Some(current_instance) = pending_instances.pop_back() {
crawled_instances.push(current_instance.clone());
match fetch_instance_details(&current_instance).await {
Ok(details) => {
instance_details.push(details.to_owned());
for i in details.linked_instances {
if !crawled_instances.contains(&i) && !pending_instances.contains(&i) {
pending_instances.push_back(i);
}
pub async fn crawl(
start_instances: Vec<String>,
max_depth: i32,
) -> Result<Vec<InstanceDetails>, Error> {
let mut pending_instances: VecDeque<CrawlInstance> = start_instances
.iter()
.map(|s| CrawlInstance::new(s.to_string(), 0))
.collect();
let mut crawled_instances = vec![];
let mut instance_details = vec![];
while let Some(current_instance) = pending_instances.pop_back() {
crawled_instances.push(current_instance.domain.clone());
if current_instance.depth > max_depth {
continue;
}
match fetch_instance_details(&current_instance.domain).await {
Ok(details) => {
instance_details.push(details.to_owned());
for i in details.linked_instances {
let is_in_crawled = crawled_instances.contains(&i);
let is_in_pending = pending_instances.iter().any(|p| p.domain == i);
if !is_in_crawled && !is_in_pending {
let ci = CrawlInstance::new(i, current_instance.depth + 1);
pending_instances.push_back(ci);
}
}
}
Err(e) => eprintln!("Failed to crawl {}: {}", current_instance.domain, e),
}
}
Err(e) => eprintln!("Failed to crawl {}: {}", current_instance, e),
}
}
Ok(instance_details)
Ok(instance_details)
}
#[derive(Serialize, Clone)]
pub struct InstanceDetails {
pub domain: String,
pub name: String,
pub version: String,
pub icon: Option<String>,
pub online_users: i32,
pub total_users: i64,
pub users_active_halfyear: i64,
pub users_active_month: i64,
pub open_registrations: bool,
pub linked_instances_count: i32,
// The following fields are only used for aggregation, but not shown in output
#[serde(skip)]
pub linked_instances: Vec<String>,
pub domain: String,
pub name: String,
pub version: String,
pub icon: Option<String>,
pub online_users: i32,
pub total_users: i64,
pub users_active_halfyear: i64,
pub users_active_month: i64,
pub open_registrations: bool,
pub linked_instances_count: i32,
// The following fields are only used for aggregation, but not shown in output
#[serde(skip)]
pub linked_instances: Vec<String>,
}
struct CrawlInstance {
domain: String,
depth: i32,
}
impl CrawlInstance {
pub fn new(domain: String, depth: i32) -> CrawlInstance {
CrawlInstance { domain, depth }
}
}
async fn fetch_instance_details(domain: &str) -> Result<InstanceDetails, Error> {
let client = Client::default();
let client = Client::default();
let node_info_url = format!("https://{}/nodeinfo/2.0.json", domain);
let node_info_request = client.get(&node_info_url).timeout(REQUEST_TIMEOUT).send();
let node_info_url = format!("https://{}/nodeinfo/2.0.json", domain);
let node_info_request = client.get(&node_info_url).timeout(REQUEST_TIMEOUT).send();
let site_info_url = format!("https://{}/api/v2/site", domain);
let site_info_request = client.get(&site_info_url).timeout(REQUEST_TIMEOUT).send();
let site_info_url = format!("https://{}/api/v2/site", domain);
let site_info_request = client.get(&site_info_url).timeout(REQUEST_TIMEOUT).send();
let (node_info, site_info) = try_join!(node_info_request, site_info_request)?;
let node_info: NodeInfo = node_info.json().await?;
let site_info: GetSiteResponse = site_info.json().await?;
let (node_info, site_info) = try_join!(node_info_request, site_info_request)?;
let node_info: NodeInfo = node_info.json().await?;
let site_info: GetSiteResponse = site_info.json().await?;
let linked_instances = site_info
.federated_instances
.map(|f| f.linked)
.unwrap_or(vec![]);
Ok(InstanceDetails {
domain: domain.to_owned(),
name: site_info.site_view.site.name,
version: node_info.software.version,
icon: site_info.site_view.site.icon,
online_users: site_info.online as i32,
total_users: node_info.usage.users.total,
users_active_halfyear: node_info.usage.users.active_halfyear,
users_active_month: node_info.usage.users.active_month,
open_registrations: node_info.open_registrations,
linked_instances_count: linked_instances.len() as i32,
linked_instances,
})
let linked_instances = site_info
.federated_instances
.map(|f| f.linked)
.unwrap_or(vec![]);
Ok(InstanceDetails {
domain: domain.to_owned(),
name: site_info.site_view.site.name,
version: node_info.software.version,
icon: site_info.site_view.site.icon,
online_users: site_info.online as i32,
total_users: node_info.usage.users.total,
users_active_halfyear: node_info.usage.users.active_halfyear,
users_active_month: node_info.usage.users.active_month,
open_registrations: node_info.open_registrations,
linked_instances_count: linked_instances.len() as i32,
linked_instances,
})
}

3
src/lib.rs

@ -1,8 +1,9 @@
use std::time::Duration;
pub mod crawl;
pub mod federated_instances;
pub mod node_info;
pub mod crawl;
pub const REQUEST_TIMEOUT: Duration = Duration::from_secs(10);
pub const START_INSTANCES: [&'static str; 1] = ["lemmy.ml"];
pub const MAX_CRAWL_DEPTH: i32 = 2;

8
src/main.rs

@ -1,14 +1,14 @@
use anyhow::Error;
use serde::Serialize;
use lemmy_stats_crawler::START_INSTANCES;
use lemmy_stats_crawler::crawl::{crawl, InstanceDetails};
use lemmy_stats_crawler::{MAX_CRAWL_DEPTH, START_INSTANCES};
use serde::Serialize;
#[tokio::main]
pub async fn main() -> Result<(), Error> {
let start_instances = START_INSTANCES.iter().map(|s| s.to_string()).collect();
eprintln!("Crawling...");
let instance_details = crawl(start_instances).await?;
let instance_details = crawl(start_instances, MAX_CRAWL_DEPTH).await?;
let total_stats = aggregate(instance_details);
println!("{}", serde_json::to_string(&total_stats)?);
@ -38,4 +38,4 @@ fn aggregate(instance_details: Vec<InstanceDetails>) -> TotalStats {
total_online_users,
instance_details,
}
}
}

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