Side A introduces the entire Reddit fetching subsystem from scratch (background worker, rate-limit/backoff, OAuth token handling, JSON parsing for posts/subreddits, wiring into AppState/UI, plus tests), representing substantial new lasting functionality. Side B is a smaller, valuable but incremental fix on top of that existing system (forcing OAuth, retry-on-401/403, error message cleanup), which is real but narrower in scope compared to the foundational architecture A establishes.
constitution · epochs · watch · epoch 3
comparison
c_c124c217f89c (tommy-mor) vs c_ca9169f732b8 (tommy-mor)
download prompt · raw event · cmp_910f3d81b528aa
council reasoning
A replaces the Reddit placeholder with the full broker/worker design (OAuth, rate-limit/backoff, URL mapping, JSON parsers, AppState/browse integration, and tests), which is the lasting feature foundation. B is a focused production fix (force OAuth when creds exist, 401/403 refresh, error truncation, fly env pin) that hardens that path but adds comparatively little new architecture.
Side A adds the core Reddit integration: a background fetch broker, OAuth support, request deduplication and rate limiting, JSON parsing into project entities, wiring into application state, and triggering fetches from browsing and path creation. Side B is a targeted refinement that improves the existing integration by requiring OAuth when configured, refreshing tokens after 401/403 responses, and producing clearer error messages for Reddit's block pages, but it builds on the infrastructure introduced in Side A.
sides
A — c_c124c217f89c (tommy-mor)
message
[8d8230d1] reddit
diff preview
diff --git a/.gitignore b/.gitignore
index 4c7073f9fac0c30fd2050d79a60ef447af58ebeb..ada462e900d24a3a6d08165d158c80f79c35a5a5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
data/
repomix-output.xml
dev-data/
+.env
diff --git a/server/Cargo.toml b/server/Cargo.toml
index 7906a8547d56b8e6a48ef59c37aa82a8510fdee9..4677fedcb45292eebebe7e9cf6ce2f5738f18ddf 100644
--- a/server/Cargo.toml
+++ b/server/Cargo.toml
@@ -16,6 +16,7 @@ tower = "0.5"
tower-http = { version = "0.5", features = ["trace"] }
tracing = "0.1"
tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+reqwest = { version = "0.12", features = ["json"] }
[dev-dependencies]
reqwest = { version = "0.12", features = ["json"] }
diff --git a/server/src/html/mod.rs b/server/src/html/mod.rs
index 2864407ed6e8ec284a1dc663acf1805534566b62..df6505021d9f446c2b453e20e3eb3cf696a111f9 100644
--- a/server/src/html/mod.rs
+++ b/server/src/html/mod.rs
@@ -272,5 +272,16 @@ pub async fn home(State(state): State<AppState>, uri: Uri) -> impl IntoResponse
pub async fn browse(State(state): State<AppState>, uri: Uri) -> impl IntoResponse {
let item = ItemId::from_browse_uri(uri.path()).unwrap_or(ItemId::root());
+ if item.as_str().starts_with("reddit.com") {
+ let needs_fetch = {
+ let tree = state.tree.read().await;
+ tree.get(&item)
+ .map(|n| n.data.is_none())
+ .unwrap_or(true)
+ };
+ if needs_fetch {
+ state.reddit.request_fetch(item.clone());
+ }
+ }
item_page(state, uri, item).await
}
diff --git a/server/src/reddit.rs b/server/src/reddit.rs
index d203dca09245daf869b3aa942898447700ae69fb..90053ad03b1d7c8e94f325dd4ee64c2b4f7da900 100644
--- a/server/src/reddit.rs
+++ b/server/src/reddit.rs
@@ -1,4 +1,12 @@
-//! Reddit API import (async, decoupled from UI request path).
+//! Reddit API import via a single background worker (rate limits, dedup, backoff).
+
+use std::collections::{HashMap, HashSet};
+use std::sync::Arc;
+use std::time::{Duration, Instant};
+
+use reqwest::{header, Client, StatusCode};
+use serde::Deserialize;
+use tokio::sync::{mpsc, RwLock};
use crate::{
path_types::ItemId,
@@ -10,12 +18,401 @@ pub fn ensure_partial_tree(tree: &mut GlobalTree, id: &ItemId) {
tree.ensure_path(id);
}
-/// Placeholder for Reddit JSON import. Returns entity data when implemented.
-pub async fn fetch_reddit_entity(_id: &ItemId) -> Option<EntityData> {
- None
+pub struct RedditCommand {
+ pub id: ItemId,
+}
+
+#[derive(Clone)]
+pub struct RedditBroker {
+ tx: mpsc::Sender<RedditCommand>,
+}
+
+#[derive(Clone)]
+struct RedditCredentials {
+ client_id: String,
+ client_secret: String,
+}
+
+struct OAuthToken {
+ access_token: String,
+ expires_at: Instant,
+}
+
+impl RedditBroker {
+ pub fn spawn(tree: Arc<RwLock<GlobalTree>>, user_agent: &str) -> Self {
+ let (tx, rx) = mpsc::channel(100);
+
+ let mut headers = header::HeaderMap::new();
+ headers.insert(
+ header::USER_AGENT,
+ header::HeaderValue::from_str(user_agent).expect("valid user agent"),
+ );
+
+ let client = Client::builder()
+ .default_headers(headers)
+ .timeout(Duration::from_secs(15))
+ .build()
+ .expect("reqwest client");
+
+ let creds = RedditCredentials::from_env();
+ tokio::spawn(reddit_worker(rx, tree, client, creds));
+
+ Self { tx }
+ }
+
+ /// Fire-and-forget: queue a fetch; worker updates the tree when done.
+ pub fn request_fetch(&self, id: ItemId) {
+ let _ = self.tx.try_send(RedditCommand { id });
+ }
+}
+
+impl RedditCredentials {
+ fn from_env() -> Option<Self> {
+ let client_id = std::env::var("REDDIT_CLIENT_ID").ok()?;
+ let client_secret = std::env::var("REDDIT_CLIENT_SECRET").ok()?;
+ if client_id.is_empty() || client_secret.is_empty() {
+ return None;
+ }
+ Some(Self {
+ client_id,
+ client_secret,
+ })
+ }
+}
+
+pub fn default_user_agent() -> String {
+ std::env::var("REDDIT_USER_AGENT").unwrap_or_else(|_| {
+ "web:sorter2.social:v0.0.1 (by /u/sorter2)".to_string()
+ })
}
-/// Apply fetched entity data to a node (called from async worker).
-pub fn apply_entity(tree: &mut GlobalTree, id: &ItemId, data: EntityData) {
- tree.set_entity_data(id, data);
+async fn reddit_worker(
+ mut rx: mpsc::Receiver<RedditCommand>,
+ tree: Arc<RwLock<GlobalTree>>,
+ client: Client,
+ creds: Option<RedditCredentials>,
+) {
+ let mut in_flight = HashSet::new();
+ let mut recently_fetched: HashMap<ItemId, Instant> = HashMap::new();
+ let mut current_delay = Duration::from_secs(1);
+ let mut oauth: Option<OAuthToken> = None;
+ let cache_ttl = Duration::from_secs(300);
+
+ while let Some(cmd) = rx.recv().await {
+ let now = Instant::now();
+ recently_fetched.retain(|_, t| now.duration_since(*t) < cache_ttl);
+
+ if in_flight.contains(&cmd.id) || recently_fetched.contains_key(&cmd.id) {
+ continue;
+ }
+
+ in_flight.insert(cmd.id.clone());
+ let fetch_id = cmd.id.clone();
+
+ tokio::time::sleep(current_delay).await;
+
+ if let Some(c) = &creds {
+ oauth = ensure_oauth_token(&client, c, oauth.take()).await;
+ }
+
+ let token = oauth.as_ref().map(|t| t.access_token.as_str());
+ let use_oauth = token.is_some();
+
+ match do_fetch(&client, &fetch_id, use_oauth, token).await {
+ Ok(FetchOutcome::Entity(data)) => {
+ let mut w = tree.write().await;
+ w.set_entity_data(&fetch_id, data);
+ recently_fetched.insert(fetch_id.clone(), Instant::now());
+ current_delay = Duration::from_millis(600);
+ }
+ Ok(FetchOutcome::NotFound) => {
+ recently_fetched.insert(fetch_id.clone(), Instant::now());
+ }
+ Ok(FetchOutcome::RateLimited { reset_secs }) => {
+ let wait = Duration::from_secs(reset_secs.max(1));
+ tracing::warn!(
+ "Reddit rate limit for {}; sleeping {}s",
+ fetch_id,
+ wait.as_secs()
+ );
+ tokio::time::sleep(wait).await;
+ current_delay = (current_delay * 2).min(Duration::from_secs(60));
+ }
+ Err(e) => {
+ tracing::warn!("Reddit fetch failed for {}: {}", fetch_id, e);
+ current_delay = (current_delay * 2).min(Duration::from_secs(60));
+ }
+ }
+
+ in_flight.remove(&fetch_id);
+ }
+}
+
+enum FetchOutcome {
+ Entity(EntityData),
+ NotFound,
+ RateLimited { reset_secs: u64 },
+}
+
+async fn ensure_oauth_token(
+ client: &Client,
+ creds: &RedditCredentials,
+ existing: Option<OAuthToken>,
+) -> Option<OAuthToken> {
+ if let Some(t) = existing {
+ if Instant::now() < t.expires_at - Duration::from_secs(60) {
+ return Some(t);
+ }
+ }
+
+ let resp = client
+ .post("https://www.reddit.com/api/v1/access_token")
+ .basic_auth(&creds.client_id, Some(&creds.client_secret))
+ .form(&[("grant_type", "client_credentials")])
+ .send()
+ .await;
+
+ let resp = match resp {
+ Ok(r) => r,
+ Err(e) => {
+ tracing::warn!("Reddit OAuth token request failed: {e}");
+ return None;
+ }
+ };
+
+ if !resp.status().is_success() {
+ tracing::warn!("Reddit OAuth token HTTP {}", resp.status());
+ return None;
+ }
+
+ #[derive(Deserialize)]
+ struct TokenResponse {
+ access_token: String,
+ expires_in: u64,
+ }
+
+ let body: TokenResponse = match resp.json().await {
+ Ok(b) => b,
+ Err(e) => {
+ tracing::warn!("Reddit OAuth token parse failed: {e}");
+ return None;
+ }
+ };
+
+ Some(OAuthToken {
+ access_token: body.access_token,
+ expires_at: Instant::now() + Duration::from_secs(body.expires_in),
+ })
+}
+
+async fn do_fetch(
+ client: &Client,
+ id: &ItemId,
+ use_oauth: bool,
+ bearer: Option<&str>,
+) -> Result<FetchOutcome, String> {
+ let url = map_item_to_reddit_api(id, use_oauth);
+ if url.is_empty() {
+ return Ok(FetchOutcome::NotFound);
+ }
+
+ let mut req = client.get(&url);
+ if let Some(token) = bearer {
+ req = req.bearer_auth(token);
+ }
+
+ let resp = req.send().await.map_err(|e| e.to_string())?;
+
+ if resp.status() == StatusCode::TOO_MANY_REQUESTS {
+ let reset = rate_limit_reset_secs(&resp);
+ return Ok(FetchOutcome::RateLimited { reset_secs: reset });
+ }
+
+ if resp.status() == StatusCode::SERVICE_UNAVAILABLE {
+ return Err("Reddit unavailable (503)".to_string());
+ }
+
+ if !resp.status().is_success() {
+ return Ok(FetchOutcome::NotFound);
+ }
+
+ if rate_limit_remaining(&resp) == Some(0) {
+ let reset = rate_limit_reset_secs(&resp);
+ return Ok(FetchOutcome::RateLimited { reset_secs: reset });
+ }
+
+ let bytes = resp.bytes().await.map_err(|e| e.to_string())?;
+ Ok(parse_reddit_json(id, &bytes)
+ .map(FetchOutcome::Entity)
+ .unwrap_or(FetchOutcome::NotFound))
+}
+
+fn rate_limit_remaining(resp: &reqwest::Response) -> Option<u64> {
+ resp.headers()
+ .get("x-ratelimit-remaining")
+ .and_then(|v| v.to_str().ok())
+ .and_then(|s| s.parse::<f64>().ok())
+ .map(|f| f.floor() as u64)
+}
+
+fn rate_limit_reset_secs(resp: &reqwest::Response) -> u64 {
+ resp.headers()
+ .get("x-ratelimit-reset")
+ .and_then(|v| v.to_str().ok())
+ .and_then(|s| s.parse::<f64>().ok())
+ .map(|f| f.ceil() as u64)
+ .unwrap_or(5)
+}
+
+/// Map canonical item id to Reddit JSON API URL.
+pub fn map_item_to_reddit_api(id: &ItemId, oauth: bool) -> String {
+ let path = id.as_str();
+ if !path.starts_with("reddit.com/") && path != "reddit.com" {
+ return String::new();
+ }
+
+ let base = if oauth {
+ "https://oauth.reddit.com"
+ } else {
+ "https://www.reddit.com"
+ };
+
+ let segments: Vec<&str> = path.split('/').collect();
+
+ if let Some(i) = segments.iter().position(|&p| p == "comments") {
+ if segments.len() > i + 1 {
+ let api_path = segments[1..=i + 1].join("/");
+ return format!("{base}/{api_path}.json?raw_json=1");
+ }
+ }
+
+ if segments.len() == 3 && segments[1] == "r" {
+ return format!("{base}/r/{}/about.json?raw_json=1", segments[2]);
+ }
+
+ String::new()
+}
+
+fn parse_reddit_json(id: &ItemId, bytes: &[u8]) -> Option<EntityData> {
+ let v: serde_json::Value = serde_json::from_slice(bytes).ok()?;
+ let segments: Vec<&str> = id.as_str().split('/').collect();
+
+ if segments.iter().any(|&p| p == "comments") {
+ parse_post_listing(&v)
+ } else {
+ parse_subreddit_about(&v)
+ }
+}
+
+fn parse_subreddit_about(v: &serde_json::Value) -> Option<EntityData> {
+ let data = v.get("data")?;
+ let title = data
+ .get("title")
+ .or_else(|| data.get("display_name"))
+ .and_then(|t| t.as_str())?
+ .to_string();
+ let body_html = data
+ .get("public_description_html")
+ .or_else(|| data.get("public_description"))
+ .and_then(|t| t.as_str())
+ .map(|s| s.to_string());
+ let thumb_url = data
+ .get("icon_img")
+ .or_else(|| data.get("community_icon"))
+ .and_then(|t| t.as_str())
+ .filter(|s| !s.is_empty())
+ .map(|s| s.to_string());
+
+ Some(EntityData {
+ title,
+ author: None,
+ body_html,
+ thumb_url,
+ })
+}
+
+fn parse_post_listing(v:
… preview truncated; 4,570 characters omittedB — c_ca9169f732b8 (tommy-mor)
message
[8f69c309] Require Reddit OAuth when credentials are set and refresh on 401/403. Avoid falling back to the public www.reddit.com API from cloud IPs, which returns Reddit's network-security block page. Also pin SORTER2_BASE_URL in fly.toml. Co-authored-by: Cursor <cursoragent@cursor.com>
diff preview
diff --git a/fly.toml b/fly.toml
index f0c6a39f643c204987debc177234d95a8ef44b65..ca7e0088a7efd7d58d29d808f8d89080b2bff233 100644
--- a/fly.toml
+++ b/fly.toml
@@ -5,6 +5,7 @@ primary_region = "iad"
dockerfile = "Dockerfile"
[env]
+ SORTER2_BASE_URL = "https://reddit.sorter.social"
SORTER2_DATA_DIR = "/data"
SORTER2_EVENT_LOG = "/data/events.jsonl"
PORT = "8080"
diff --git a/server/src/reddit.rs b/server/src/reddit.rs
index a874814f8927192ee62cab2d0db1efd27dcd57b7..f409764c1e1f36216f1b08107043c2eab905694c 100644
--- a/server/src/reddit.rs
+++ b/server/src/reddit.rs
@@ -283,26 +283,35 @@ async fn reddit_worker(
);
tokio::time::sleep(current_delay).await;
- if let Some(c) = &creds {
- oauth = ensure_oauth_token(&client, &oauth_token_base, c, oauth.take()).await;
- }
-
- let token = oauth.as_ref().map(|t| t.access_token.as_str());
- let fetch_base = if token.is_some() {
- tracing::debug!(
- item = %fetch_id,
- base = %oauth_api_base,
- "reddit fetch using OAuth bearer"
- );
- &oauth_api_base
- } else {
- &api_base
- };
- let url = match kind {
- FetchKind::SelfEntity => map_item_to_reddit_api(&fetch_id, fetch_base),
- FetchKind::Children => map_children_url(&fetch_id, fetch_base),
+ let outcome = match &creds {
+ Some(c) => {
+ // OAuth is required when credentials are configured — never fall
+ // back to the public www.reddit.com JSON endpoints (cloud IPs
+ // get blocked with a 403 HTML interstitial).
+ fetch_with_oauth(
+ &client,
+ &oauth_token_base,
+ &oauth_api_base,
+ c,
+ &mut oauth,
+ &fetch_id,
+ kind,
+ )
+ .await
+ }
+ None => {
+ let url = match kind {
+ FetchKind::SelfEntity => map_item_to_reddit_api(&fetch_id, &api_base),
+ FetchKind::Children => map_children_url(&fetch_id, &api_base),
+ };
+ match do_fetch(&client, &url, &fetch_id, None).await {
+ Ok(FetchOutcome::AuthRejected { status, detail }) => {
+ Err(format!("Reddit API {status}: {detail}"))
+ }
+ other => other,
+ }
+ }
};
- let outcome = do_fetch(&client, &url, &fetch_id, token).await;
match outcome {
Ok(FetchOutcome::Payload(payload)) => {
@@ -342,6 +351,12 @@ async fn reddit_worker(
current_delay = (current_delay * 2).min(Duration::from_secs(60));
notify(done, FetchJobResult::RateLimited { reset_secs });
}
+ Ok(FetchOutcome::AuthRejected { status, detail }) => {
+ let e = format!("Reddit API {status}: {detail}");
+ tracing::warn!(item = %fetch_id, err = %e, "reddit fetch auth rejected");
+ current_delay = (current_delay * 2).min(Duration::from_secs(60));
+ notify(done, FetchJobResult::Failed(e));
+ }
Err(e) => {
tracing::warn!(item = %fetch_id, err = %e, "reddit fetch failed");
current_delay = (current_delay * 2).min(Duration::from_secs(60));
@@ -357,6 +372,60 @@ enum FetchOutcome {
Payload(Value),
NotFound,
RateLimited { reset_secs: u64 },
+ /// Bearer rejected — caller should drop the cached token and retry once.
+ AuthRejected { status: StatusCode, detail: String },
+}
+
+async fn fetch_with_oauth(
+ client: &Client,
+ oauth_token_base: &str,
+ oauth_api_base: &str,
+ creds: &RedditCredentials,
+ oauth: &mut Option<OAuthToken>,
+ fetch_id: &ItemId,
+ kind: FetchKind,
+) -> Result<FetchOutcome, String> {
+ for attempt in 0..2 {
+ let force_refresh = attempt > 0;
+ *oauth = Some(
+ ensure_oauth_token(client, oauth_token_base, creds, oauth.take(), force_refresh)
+ .await?,
+ );
+ let token = oauth
+ .as_ref()
+ .expect("token set above")
+ .access_token
+ .clone();
+
+ tracing::debug!(
+ item = %fetch_id,
+ base = %oauth_api_base,
+ attempt,
+ "reddit fetch using OAuth bearer"
+ );
+
+ let url = match kind {
+ FetchKind::SelfEntity => map_item_to_reddit_api(fetch_id, oauth_api_base),
+ FetchKind::Children => map_children_url(fetch_id, oauth_api_base),
+ };
+ match do_fetch(client, &url, fetch_id, Some(&token)).await? {
+ FetchOutcome::AuthRejected { status, detail } if attempt == 0 => {
+ tracing::warn!(
+ item = %fetch_id,
+ %status,
+ %detail,
+ "reddit OAuth rejected; refreshing token and retrying"
+ );
+ *oauth = None;
+ continue;
+ }
+ FetchOutcome::AuthRejected { status, detail } => {
+ return Err(format!("Reddit API {status}: {detail}"));
+ }
+ other => return Ok(other),
+ }
+ }
+ unreachable!("loop always returns")
}
async fn ensure_oauth_token(
@@ -364,35 +433,35 @@ async fn ensure_oauth_token(
oauth_base: &str,
creds: &RedditCredentials,
existing: Option<OAuthToken>,
-) -> Option<OAuthToken> {
- if let Some(t) = existing {
- if Instant::now() < t.expires_at - Duration::from_secs(60) {
- tracing::debug!("reddit OAuth token still valid");
- return Some(t);
+ force_refresh: bool,
+) -> Result<OAuthToken, String> {
+ if !force_refresh {
+ if let Some(t) = existing {
+ if Instant::now() < t.expires_at - Duration::from_secs(60) {
+ tracing::debug!("reddit OAuth token still valid");
+ return Ok(t);
+ }
}
}
let url = format!("{}/api/v1/access_token", oauth_base.trim_end_matches('/'));
- tracing::debug!(%url, "reddit OAuth token request");
+ tracing::debug!(%url, force_refresh, "reddit OAuth token request");
let resp = client
.post(&url)
.basic_auth(&creds.client_id, Some(&creds.client_secret))
.form(&[("grant_type", "client_credentials")])
.send()
- .await;
-
- let resp = match resp {
- Ok(r) => r,
- Err(e) => {
- tracing::warn!("reddit OAuth token request failed: {e}");
- return None;
- }
- };
+ .await
+ .map_err(|e| format!("Reddit OAuth token request failed: {e}"))?;
if !resp.status().is_success() {
- tracing::warn!("reddit OAuth token HTTP {}", resp.status());
- return None;
+ let status = resp.status();
+ let body = resp.text().await.unwrap_or_default();
+ return Err(format!(
+ "Reddit OAuth token HTTP {status}: {}",
+ truncate_for_error(&body)
+ ));
}
#[derive(Deserialize)]
@@ -401,21 +470,40 @@ async fn ensure_oauth_token(
expires_in: u64,
}
- let body: TokenResponse = match resp.json().await {
- Ok(b) => b,
- Err(e) => {
- tracing::warn!("reddit OAuth token parse failed: {e}");
- return None;
- }
- };
+ let body: TokenResponse = resp
+ .json()
+ .await
+ .map_err(|e| format!("Reddit OAuth token parse failed: {e}"))?;
- tracing::debug!(expires_in = body.expires_in, "reddit OAuth token acquired");
- Some(OAuthToken {
+ tracing::info!(expires_in = body.expires_in, "reddit OAuth token acquired");
+ Ok(OAuthToken {
access_token: body.access_token,
expires_at: Instant::now() + Duration::from_secs(body.expires_in),
})
}
+fn truncate_for_error(body: &str) -> String {
+ let compact: String = body.split_whitespace().collect::<Vec<_>>().join(" ");
+ if compact.is_empty() {
+ return "(empty body)".into();
+ }
+ // Prefer the human-readable block message over dumping Reddit's CSS.
+ if let Some(idx) = compact.find("You've been blocked") {
+ let slice: String = compact.chars().skip(idx).take(160).collect();
+ return if compact.chars().count() > idx + 160 {
+ format!("{slice}…")
+ } else {
+ slice
+ };
+ }
+ let chars: String = compact.chars().take(200).collect();
+ if compact.chars().count() > 200 {
+ format!("{chars}…")
+ } else {
+ chars
+ }
+}
+
async fn do_fetch(
client: &Client,
url: &str,
@@ -460,15 +548,16 @@ async fn do_fetch(
if !status.is_success() {
let body = resp.text().await.unwrap_or_default();
+ let detail = truncate_for_error(&body);
tracing::debug!(
item = %id,
%status,
body_len = body.len(),
- body_prefix = %body.chars().take(240).collect::<String>(),
+ %detail,
"reddit non-success body"
);
if status == StatusCode::FORBIDDEN || status == StatusCode::UNAUTHORIZED {
- return Err(format!("Reddit API {status}: {body}"));
+ return Ok(FetchOutcome::AuthRejected { status, detail });
}
return Ok(FetchOutcome::NotFound);
}
@@ -716,6 +805,15 @@ fn reddit_direct_image_url(url: &str) -> bool {
mod tests {
use super::*;
+ #[test]
+ fn truncate_error_prefers_block_message() {
+ let html = r#"<style>.x{color:red}</style><div>You've been blocked by network security. To continue, log in</div>"#;
+ let msg = truncate_for_error(html);
+ assert!(msg.starts_with("You've been blocked"));
+ assert!(msg.len() < 200);
+ assert!(!msg.contains(".x{color"));
+ }
+
#[test]
fn map_subreddit_about_url() {
let id = ItemId::from_url("https://reddit.com/r/rust").unwrap();
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