Use NOTIFY/LISTEN instead of polling for updates (#3)

* Use NOTIFY/LISTEN instead of polling for updates.

* Allow different distances for multiple hashes.

.gitignore

@@ -1 +1,2 @@
 /target
+.env

Cargo.toml

@@ -28,9 +28,7 @@ warp = "0.3"
 reqwest = "0.11"
 hyper = "0.14"
 
-tokio-postgres = "0.7"
+sqlx = { version = "0.5", features = ["runtime-tokio-native-tls", "postgres", "macros", "json", "offline"] }
-bb8 = "0.7"
-bb8-postgres = "0.7"
 
 img_hash = "3"
 image = "0.23"

Dockerfile

@@ -1,5 +1,6 @@
 FROM rust:1-slim AS builder
 WORKDIR /src
+ENV SQLX_OFFLINE=true
 RUN apt-get update -y && apt-get install -y libssl-dev pkg-config
 COPY . .
 RUN cargo install --root / --path .

sqlx-data.json

@@ -0,0 +1,194 @@
+{
+  "db": "PostgreSQL",
+  "1984ce60f052d6a29638f8e05b35671b8edfbf273783d4b843ebd35cbb8a391f": {
+    "query": "INSERT INTO\n            rate_limit (api_key_id, time_window, group_name, count)\n        VALUES\n            ($1, $2, $3, $4)\n        ON CONFLICT ON CONSTRAINT unique_window\n            DO UPDATE set count = rate_limit.count + $4\n        RETURNING rate_limit.count",
+    "describe": {
+      "columns": [
+        {
+          "ordinal": 0,
+          "name": "count",
+          "type_info": "Int2"
+        }
+      ],
+      "parameters": {
+        "Left": [
+          "Int4",
+          "Int8",
+          "Text",
+          "Int2"
+        ]
+      },
+      "nullable": [
+        false
+      ]
+    }
+  },
+  "659ee9ddc1c5ccd42ba9dc1617440544c30ece449ba3ba7f9d39f447b8af3cfe": {
+    "query": "SELECT\n            api_key.id,\n            api_key.name_limit,\n            api_key.image_limit,\n            api_key.hash_limit,\n            api_key.name,\n            account.email owner_email\n        FROM\n            api_key\n        JOIN account\n            ON account.id = api_key.user_id\n        WHERE\n            api_key.key = $1\n    ",
+    "describe": {
+      "columns": [
+        {
+          "ordinal": 0,
+          "name": "id",
+          "type_info": "Int4"
+        },
+        {
+          "ordinal": 1,
+          "name": "name_limit",
+          "type_info": "Int2"
+        },
+        {
+          "ordinal": 2,
+          "name": "image_limit",
+          "type_info": "Int2"
+        },
+        {
+          "ordinal": 3,
+          "name": "hash_limit",
+          "type_info": "Int2"
+        },
+        {
+          "ordinal": 4,
+          "name": "name",
+          "type_info": "Varchar"
+        },
+        {
+          "ordinal": 5,
+          "name": "owner_email",
+          "type_info": "Varchar"
+        }
+      ],
+      "parameters": {
+        "Left": [
+          "Text"
+        ]
+      },
+      "nullable": [
+        false,
+        false,
+        false,
+        false,
+        true,
+        false
+      ]
+    }
+  },
+  "6b8d304fc40fa539ae671e6e24e7978ad271cb7a1cafb20fc4b4096a958d790f": {
+    "query": "SELECT exists(SELECT 1 FROM twitter_user WHERE lower(data->>'screen_name') = lower($1))",
+    "describe": {
+      "columns": [
+        {
+          "ordinal": 0,
+          "name": "exists",
+          "type_info": "Bool"
+        }
+      ],
+      "parameters": {
+        "Left": [
+          "Text"
+        ]
+      },
+      "nullable": [
+        null
+      ]
+    }
+  },
+  "f4608ccaf739d36649cdbc5297177a989cc7763006d28c97e219bb708930972a": {
+    "query": "SELECT\n                        hashes.id,\n                        hashes.hash,\n                        hashes.furaffinity_id,\n                        hashes.e621_id,\n                        hashes.twitter_id,\n                    CASE\n                        WHEN furaffinity_id IS NOT NULL THEN (f.url)\n                        WHEN e621_id IS NOT NULL THEN (e.data->'file'->>'url')\n                        WHEN twitter_id IS NOT NULL THEN (tm.url)\n                    END url,\n                    CASE\n                        WHEN furaffinity_id IS NOT NULL THEN (f.filename)\n                        WHEN e621_id IS NOT NULL THEN ((e.data->'file'->>'md5') || '.' || (e.data->'file'->>'ext'))\n                        WHEN twitter_id IS NOT NULL THEN (SELECT split_part(split_part(tm.url, '/', 5), ':', 1))\n                    END filename,\n                    CASE\n                        WHEN furaffinity_id IS NOT NULL THEN (ARRAY(SELECT f.name))\n                        WHEN e621_id IS NOT NULL THEN ARRAY(SELECT jsonb_array_elements_text(e.data->'tags'->'artist'))\n                        WHEN twitter_id IS NOT NULL THEN ARRAY(SELECT tw.data->'user'->>'screen_name')\n                    END artists,\n                    CASE\n                        WHEN furaffinity_id IS NOT NULL THEN (f.file_id)\n                    END file_id,\n                    CASE\n                        WHEN e621_id IS NOT NULL THEN ARRAY(SELECT jsonb_array_elements_text(e.data->'sources'))\n                    END sources\n                FROM\n                    hashes\n                LEFT JOIN LATERAL (\n                    SELECT *\n                    FROM submission\n                    JOIN artist ON submission.artist_id = artist.id\n                    WHERE submission.id = hashes.furaffinity_id\n                ) f ON hashes.furaffinity_id IS NOT NULL\n                LEFT JOIN LATERAL (\n                    SELECT *\n                    FROM e621\n                    WHERE e621.id = hashes.e621_id\n                ) e ON hashes.e621_id IS NOT NULL\n                LEFT JOIN LATERAL (\n                    SELECT *\n                    FROM tweet\n                    WHERE tweet.id = hashes.twitter_id\n                ) tw ON hashes.twitter_id IS NOT NULL\n                LEFT JOIN LATERAL (\n                    SELECT *\n                    FROM tweet_media\n                    WHERE\n                        tweet_media.tweet_id = hashes.twitter_id AND\n                        tweet_media.hash <@ (hashes.hash, 0)\n                    LIMIT 1\n                ) tm ON hashes.twitter_id IS NOT NULL\n                WHERE hashes.id = $1",
+    "describe": {
+      "columns": [
+        {
+          "ordinal": 0,
+          "name": "id",
+          "type_info": "Int4"
+        },
+        {
+          "ordinal": 1,
+          "name": "hash",
+          "type_info": "Int8"
+        },
+        {
+          "ordinal": 2,
+          "name": "furaffinity_id",
+          "type_info": "Int4"
+        },
+        {
+          "ordinal": 3,
+          "name": "e621_id",
+          "type_info": "Int4"
+        },
+        {
+          "ordinal": 4,
+          "name": "twitter_id",
+          "type_info": "Int8"
+        },
+        {
+          "ordinal": 5,
+          "name": "url",
+          "type_info": "Text"
+        },
+        {
+          "ordinal": 6,
+          "name": "filename",
+          "type_info": "Text"
+        },
+        {
+          "ordinal": 7,
+          "name": "artists",
+          "type_info": "TextArray"
+        },
+        {
+          "ordinal": 8,
+          "name": "file_id",
+          "type_info": "Int4"
+        },
+        {
+          "ordinal": 9,
+          "name": "sources",
+          "type_info": "TextArray"
+        }
+      ],
+      "parameters": {
+        "Left": [
+          "Int4"
+        ]
+      },
+      "nullable": [
+        false,
+        false,
+        true,
+        true,
+        true,
+        null,
+        null,
+        null,
+        null,
+        null
+      ]
+    }
+  },
+  "fe60be66b2d8a8f02b3bfe06d1f0e57e4bb07e80cba1b379a5f17f6cbd8b075c": {
+    "query": "SELECT id, hash FROM hashes",
+    "describe": {
+      "columns": [
+        {
+          "ordinal": 0,
+          "name": "id",
+          "type_info": "Int4"
+        },
+        {
+          "ordinal": 1,
+          "name": "hash",
+          "type_info": "Int8"
+        }
+      ],
+      "parameters": {
+        "Left": []
+      },
+      "nullable": [
+        false,
+        false
+      ]
+    }
+  }
+}

src/handlers.rs

@@ -8,8 +8,7 @@ use warp::{Rejection, Reply};
 
 #[derive(Debug)]
 enum Error {
-    Bb8(bb8::RunError<tokio_postgres::Error>),
+    Postgres(sqlx::Error),
-    Postgres(tokio_postgres::Error),
     Reqwest(reqwest::Error),
     InvalidData,
     InvalidImage,
@@ -20,7 +19,7 @@ enum Error {
 impl warp::Reply for Error {
     fn into_response(self) -> warp::reply::Response {
         let msg = match self {
-            Error::Bb8(_) | Error::Postgres(_) | Error::Reqwest(_) => ErrorMessage {
+            Error::Postgres(_) | Error::Reqwest(_) => ErrorMessage {
                 code: 500,
                 message: "Internal server error".to_string(),
             },
@@ -51,14 +50,8 @@ impl warp::Reply for Error {
     }
 }
 
-impl From<bb8::RunError<tokio_postgres::Error>> for Error {
+impl From<sqlx::Error> for Error {
-    fn from(err: bb8::RunError<tokio_postgres::Error>) -> Self {
+    fn from(err: sqlx::Error) -> Self {
-        Error::Bb8(err)
-    }
-}
-
-impl From<tokio_postgres::Error> for Error {
-    fn from(err: tokio_postgres::Error) -> Self {
         Error::Postgres(err)
     }
 }
@@ -112,12 +105,10 @@ async fn hash_input(form: warp::multipart::FormData) -> (i64, img_hash::ImageHas
 pub async fn search_image(
     form: warp::multipart::FormData,
     opts: ImageSearchOpts,
-    pool: Pool,
+    db: Pool,
     tree: Tree,
     api_key: String,
 ) -> Result<Box<dyn Reply>, Rejection> {
-    let db = early_return!(pool.get().await);
-
     let image_remaining = rate_limit!(&api_key, &db, image_limit, "image");
     let hash_remaining = rate_limit!(&api_key, &db, hash_limit, "hash");
 
@@ -126,7 +117,7 @@ pub async fn search_image(
     let mut items = {
         if opts.search_type == Some(ImageSearchType::Force) {
             image_query(
-                pool.clone(),
+                db.clone(),
                 tree.clone(),
                 vec![num],
                 10,
@@ -136,7 +127,7 @@ pub async fn search_image(
             .unwrap()
         } else {
             let results = image_query(
-                pool.clone(),
+                db.clone(),
                 tree.clone(),
                 vec![num],
                 0,
@@ -146,7 +137,7 @@ pub async fn search_image(
             .unwrap();
             if results.is_empty() && opts.search_type != Some(ImageSearchType::Exact) {
                 image_query(
-                    pool.clone(),
+                    db.clone(),
                     tree.clone(),
                     vec![num],
                     10,
@@ -194,10 +185,8 @@ pub async fn stream_image(
     tree: Tree,
     api_key: String,
 ) -> Result<Box<dyn Reply>, Rejection> {
-    let db = early_return!(pool.get().await);
+    rate_limit!(&api_key, &pool, image_limit, "image", 2);
-
+    rate_limit!(&api_key, &pool, hash_limit, "hash");
-    rate_limit!(&api_key, &db, image_limit, "image", 2);
-    rate_limit!(&api_key, &db, hash_limit, "hash");
 
     let (num, hash) = hash_input(form).await;
 
@@ -220,7 +209,7 @@ pub async fn stream_image(
 
 #[allow(clippy::unnecessary_wraps)]
 fn sse_matches(
-    matches: Result<Vec<File>, tokio_postgres::Error>,
+    matches: Result<Vec<File>, sqlx::Error>,
 ) -> Result<warp::sse::Event, core::convert::Infallible> {
     let items = matches.unwrap();
 
@@ -234,7 +223,6 @@ pub async fn search_hashes(
     api_key: String,
 ) -> Result<Box<dyn Reply>, Rejection> {
     let pool = db.clone();
-    let db = early_return!(db.get().await);
 
     let hashes: Vec<i64> = opts
         .hashes
@@ -280,22 +268,12 @@ pub async fn search_file(
     db: Pool,
     api_key: String,
 ) -> Result<Box<dyn Reply>, Rejection> {
-    let db = early_return!(db.get().await);
+    use sqlx::Row;
 
     let file_remaining = rate_limit!(&api_key, &db, name_limit, "file");
 
-    let (filter, val): (&'static str, &(dyn tokio_postgres::types::ToSql + Sync)) =
+    let query = if let Some(ref id) = opts.id {
-        if let Some(ref id) = opts.id {
+        sqlx::query(
-            ("file_id = $1", id)
-        } else if let Some(ref name) = opts.name {
-            ("lower(filename) = lower($1)", name)
-        } else if let Some(ref url) = opts.url {
-            ("lower(url) = lower($1)", url)
-        } else {
-            return Ok(Box::new(Error::InvalidData));
-        };
-
-    let query = format!(
             "SELECT
                     submission.id,
                     submission.url,
@@ -310,25 +288,63 @@ pub async fn search_file(
                 JOIN hashes
                     ON hashes.furaffinity_id = submission.id
                 WHERE
-            {}
+                    file_id = $1
                 LIMIT 10",
-        filter
-    );
-
-    let matches: Vec<_> = early_return!(
-        db.query::<str>(&*query, &[val])
-            .instrument(span!(tracing::Level::TRACE, "waiting for db"))
-            .await
         )
-    .into_iter()
+        .bind(id)
+    } else if let Some(ref name) = opts.name {
+        sqlx::query(
+            "SELECT
+                    submission.id,
+                    submission.url,
+                    submission.filename,
+                    submission.file_id,
+                    artist.name,
+                    hashes.id hash_id
+                FROM
+                    submission
+                JOIN artist
+                    ON artist.id = submission.artist_id
+                JOIN hashes
+                    ON hashes.furaffinity_id = submission.id
+                WHERE
+                    lower(filename) = lower($1)
+                LIMIT 10",
+        )
+        .bind(name)
+    } else if let Some(ref url) = opts.url {
+        sqlx::query(
+            "SELECT
+                    submission.id,
+                    submission.url,
+                    submission.filename,
+                    submission.file_id,
+                    artist.name,
+                    hashes.id hash_id
+                FROM
+                    submission
+                JOIN artist
+                    ON artist.id = submission.artist_id
+                JOIN hashes
+                    ON hashes.furaffinity_id = submission.id
+                WHERE
+                    lower(url) = lower($1)
+                LIMIT 10",
+        )
+        .bind(url)
+    } else {
+        return Ok(Box::new(Error::InvalidData));
+    };
+
+    let matches: Result<Vec<File>, _> = query
         .map(|row| File {
             id: row.get("hash_id"),
-        site_id: row.get::<&str, i32>("id") as i64,
+            site_id: row.get::<i32, _>("id") as i64,
-        site_id_str: row.get::<&str, i32>("id").to_string(),
+            site_id_str: row.get::<i32, _>("id").to_string(),
             url: row.get("url"),
             filename: row.get("filename"),
             artists: row
-            .get::<&str, Option<String>>("name")
+                .get::<Option<String>, _>("name")
                 .map(|artist| vec![artist]),
             distance: None,
             hash: None,
@@ -337,7 +353,10 @@ pub async fn search_file(
             })),
             searched_hash: None,
         })
-    .collect();
+        .fetch_all(&db)
+        .await;
+
+    let matches = early_return!(matches);
 
     let resp = warp::http::Response::builder()
         .header("x-rate-limit-total-file", file_remaining.1.to_string())
@@ -350,17 +369,13 @@ pub async fn search_file(
 }
 
 pub async fn check_handle(opts: HandleOpts, db: Pool) -> Result<Box<dyn Reply>, Rejection> {
-    let db = early_return!(db.get().await);
-
     let exists = if let Some(handle) = opts.twitter {
-        !early_return!(
+        let result = sqlx::query_scalar!("SELECT exists(SELECT 1 FROM twitter_user WHERE lower(data->>'screen_name') = lower($1))", handle)
-            db.query(
+            .fetch_optional(&db)
-                "SELECT 1 FROM twitter_user WHERE lower(data->>'screen_name') = lower($1)",
-                &[&handle],
-            )
             .await
-        )
+            .map(|row| row.flatten().unwrap_or(false));
-        .is_empty()
+
+        early_return!(result)
     } else {
         false
     };
@@ -370,7 +385,7 @@ pub async fn check_handle(opts: HandleOpts, db: Pool) -> Result<Box<dyn Reply>,
 
 pub async fn search_image_by_url(
     opts: UrlSearchOpts,
-    pool: Pool,
+    db: Pool,
     tree: Tree,
     api_key: String,
 ) -> Result<Box<dyn Reply>, Rejection> {
@@ -378,8 +393,6 @@ pub async fn search_image_by_url(
 
     let url = opts.url;
 
-    let db = early_return!(pool.get().await);
-
     let image_remaining = rate_limit!(&api_key, &db, image_limit, "image");
     let hash_remaining = rate_limit!(&api_key, &db, hash_limit, "hash");
 
@@ -424,13 +437,7 @@ pub async fn search_image_by_url(
     let hash: [u8; 8] = hash.as_bytes().try_into().unwrap();
     let num = i64::from_be_bytes(hash);
 
-    let results = image_query(
+    let results = image_query(db.clone(), tree.clone(), vec![num], 3, Some(hash.to_vec()))
-        pool.clone(),
-        tree.clone(),
-        vec![num],
-        3,
-        Some(hash.to_vec()),
-    )
         .await
         .unwrap();
 

src/main.rs

@@ -1,6 +1,5 @@
 #![recursion_limit = "256"]
 
-use std::str::FromStr;
 use std::sync::Arc;
 use tokio::sync::RwLock;
 use warp::Filter;
@@ -12,7 +11,7 @@ mod types;
 mod utils;
 
 type Tree = Arc<RwLock<bk_tree::BKTree<Node, Hamming>>>;
-type Pool = bb8::Pool<bb8_postgres::PostgresConnectionManager<tokio_postgres::NoTls>>;
+type Pool = sqlx::PgPool;
 
 #[derive(Debug)]
 pub struct Node {
@@ -38,93 +37,15 @@ impl bk_tree::Metric<Node> for Hamming {
 async fn main() {
     configure_tracing();
 
-    let s = std::env::var("POSTGRES_DSN").expect("Missing POSTGRES_DSN");
+    let s = std::env::var("DATABASE_URL").expect("Missing DATABASE_URL");
 
-    let manager = bb8_postgres::PostgresConnectionManager::new(
+    let db_pool = sqlx::PgPool::connect(&s)
-        tokio_postgres::Config::from_str(&s).expect("Invalid POSTGRES_DSN"),
-        tokio_postgres::NoTls,
-    );
-
-    let db_pool = bb8::Pool::builder()
-        .build(manager)
         .await
-        .expect("Unable to build Postgres pool");
+        .expect("Unable to create Postgres pool");
 
     let tree: Tree = Arc::new(RwLock::new(bk_tree::BKTree::new(Hamming)));
 
-    let mut max_id = 0;
+    load_updates(db_pool.clone(), tree.clone()).await;
-
-    let conn = db_pool.get().await.unwrap();
-    let mut lock = tree.write().await;
-    conn.query("SELECT id, hash FROM hashes", &[])
-        .await
-        .unwrap()
-        .into_iter()
-        .for_each(|row| {
-            let id: i32 = row.get(0);
-            let hash: i64 = row.get(1);
-            let bytes = hash.to_be_bytes();
-
-            if id > max_id {
-                max_id = id;
-            }
-
-            lock.add(Node { id, hash: bytes });
-        });
-    drop(lock);
-    drop(conn);
-
-    let tree_clone = tree.clone();
-    let pool_clone = db_pool.clone();
-    tokio::spawn(async move {
-        use futures::StreamExt;
-
-        let max_id = std::sync::atomic::AtomicI32::new(max_id);
-        let tree = tree_clone;
-        let pool = pool_clone;
-
-        let order = std::sync::atomic::Ordering::SeqCst;
-
-        let interval = async_stream::stream! {
-            let mut interval = tokio::time::interval(std::time::Duration::from_secs(30));
-
-            while let item = interval.tick().await {
-                yield item;
-            }
-        };
-
-        interval
-            .for_each(|_| async {
-                tracing::debug!("Refreshing hashes");
-
-                let conn = pool.get().await.unwrap();
-                let mut lock = tree.write().await;
-                let id = max_id.load(order);
-
-                let mut count: usize = 0;
-
-                conn.query("SELECT id, hash FROM hashes WHERE hashes.id > $1", &[&id])
-                    .await
-                    .unwrap()
-                    .into_iter()
-                    .for_each(|row| {
-                        let id: i32 = row.get(0);
-                        let hash: i64 = row.get(1);
-                        let bytes = hash.to_be_bytes();
-
-                        if id > max_id.load(order) {
-                            max_id.store(id, order);
-                        }
-
-                        lock.add(Node { id, hash: bytes });
-
-                        count += 1;
-                    });
-
-                tracing::trace!("Added {} new hashes", count);
-            })
-            .await;
-    });
 
     let log = warp::log("fuzzysearch");
     let cors = warp::cors()
@@ -198,6 +119,69 @@ fn configure_tracing() {
     registry.init();
 }
 
+#[derive(serde::Deserialize)]
+struct HashRow {
+    id: i32,
+    hash: i64,
+}
+
+async fn create_tree(conn: &Pool) -> bk_tree::BKTree<Node, Hamming> {
+    use futures::TryStreamExt;
+
+    let mut tree = bk_tree::BKTree::new(Hamming);
+
+    let mut rows = sqlx::query_as!(HashRow, "SELECT id, hash FROM hashes").fetch(conn);
+
+    while let Some(row) = rows.try_next().await.expect("Unable to get row") {
+        tree.add(Node {
+            id: row.id,
+            hash: row.hash.to_be_bytes(),
+        })
+    }
+
+    tree
+}
+
+async fn load_updates(conn: Pool, tree: Tree) {
+    let mut listener = sqlx::postgres::PgListener::connect_with(&conn)
+        .await
+        .unwrap();
+    listener.listen("fuzzysearch_hash_added").await.unwrap();
+
+    let new_tree = create_tree(&conn).await;
+    let mut lock = tree.write().await;
+    *lock = new_tree;
+    drop(lock);
+
+    tokio::spawn(async move {
+        loop {
+            while let Some(notification) = listener
+                .try_recv()
+                .await
+                .expect("Unable to recv notification")
+            {
+                let payload: HashRow = serde_json::from_str(notification.payload()).unwrap();
+                tracing::debug!(id = payload.id, "Adding new hash to tree");
+
+                let mut lock = tree.write().await;
+                lock.add(Node {
+                    id: payload.id,
+                    hash: payload.hash.to_be_bytes(),
+                });
+                drop(lock);
+            }
+
+            tracing::error!("Lost connection to Postgres, recreating tree");
+            tokio::time::sleep(std::time::Duration::from_secs(10)).await;
+            let new_tree = create_tree(&conn).await;
+            let mut lock = tree.write().await;
+            *lock = new_tree;
+            drop(lock);
+            tracing::info!("Replaced tree");
+        }
+    });
+}
+
 fn get_hasher() -> img_hash::Hasher<[u8; 8]> {
     use img_hash::{HashAlg::Gradient, HasherConfig};
 

src/models.rs

@@ -1,44 +1,31 @@
 use crate::types::*;
-use crate::utils::extract_rows;
 use crate::{Pool, Tree};
 use tracing_futures::Instrument;
 
-pub type Db<'a> =
-    &'a bb8::PooledConnection<'a, bb8_postgres::PostgresConnectionManager<tokio_postgres::NoTls>>;
-
 #[tracing::instrument(skip(db))]
-pub async fn lookup_api_key(key: &str, db: Db<'_>) -> Option<ApiKey> {
+pub async fn lookup_api_key(key: &str, db: &sqlx::PgPool) -> Option<ApiKey> {
-    let rows = db
+    sqlx::query_as!(
-        .query(
+        ApiKey,
         "SELECT
             api_key.id,
             api_key.name_limit,
             api_key.image_limit,
             api_key.hash_limit,
             api_key.name,
-            account.email
+            account.email owner_email
         FROM
             api_key
         JOIN account
             ON account.id = api_key.user_id
         WHERE
-            api_key.key = $1",
+            api_key.key = $1
-            &[&key],
+    ",
+        key
     )
+    .fetch_optional(db)
     .await
-        .expect("Unable to query API keys");
+    .ok()
-
+    .flatten()
-    match rows.into_iter().next() {
-        Some(row) => Some(ApiKey {
-            id: row.get(0),
-            name_limit: row.get(1),
-            image_limit: row.get(2),
-            hash_limit: row.get(3),
-            name: row.get(4),
-            owner_email: row.get(5),
-        }),
-        _ => None,
-    }
 }
 
 #[tracing::instrument(skip(pool, tree))]
@@ -48,7 +35,7 @@ pub async fn image_query(
     hashes: Vec<i64>,
     distance: i64,
     hash: Option<Vec<u8>>,
-) -> Result<Vec<File>, tokio_postgres::Error> {
+) -> Result<Vec<File>, sqlx::Error> {
     let mut results = image_query_sync(pool, tree, hashes, distance, hash);
     let mut matches = Vec::new();
 
@@ -66,19 +53,26 @@ pub fn image_query_sync(
     hashes: Vec<i64>,
     distance: i64,
     hash: Option<Vec<u8>>,
-) -> tokio::sync::mpsc::Receiver<Result<Vec<File>, tokio_postgres::Error>> {
+) -> tokio::sync::mpsc::Receiver<Result<Vec<File>, sqlx::Error>> {
     let (tx, rx) = tokio::sync::mpsc::channel(50);
 
     tokio::spawn(async move {
-        let db = pool.get().await.unwrap();
+        let db = pool;
 
         for query_hash in hashes {
+            let mut seen = std::collections::HashSet::new();
+
             let node = crate::Node::query(query_hash.to_be_bytes());
             let lock = tree.read().await;
             let items = lock.find(&node, distance as u64);
 
-            for (_dist, item) in items {
+            for (dist, item) in items {
-                let query = db.query("SELECT
+                if seen.contains(&item.id) {
+                    continue;
+                }
+                seen.insert(item.id);
+
+                let row = sqlx::query!("SELECT
                         hashes.id,
                         hashes.hash,
                         hashes.furaffinity_id,
@@ -131,14 +125,44 @@ pub fn image_query_sync(
                         tweet_media.hash <@ (hashes.hash, 0)
                     LIMIT 1
                 ) tm ON hashes.twitter_id IS NOT NULL
-                WHERE hashes.id = $1", &[&item.id]).await;
+                WHERE hashes.id = $1", item.id).map(|row| {
-                let rows = query.map(|rows| {
+                    let (site_id, site_info) = if let Some(fa_id) = row.furaffinity_id {
-                    extract_rows(rows, hash.as_deref()).into_iter().map(|mut file| {
+                        (
-                        file.searched_hash = Some(query_hash);
+                            fa_id as i64,
-                        file
+                            Some(SiteInfo::FurAffinity(FurAffinityFile {
-                    }).collect()
+                                file_id: row.file_id.unwrap(),
-                });
+                            }))
-                tx.send(rows).await.unwrap();
+                        )
+                    } else if let Some(e621_id) = row.e621_id {
+                        (
+                            e621_id as i64,
+                            Some(SiteInfo::E621(E621File {
+                                sources: row.sources,
+                            }))
+                        )
+                    } else if let Some(twitter_id) = row.twitter_id {
+                        (twitter_id, Some(SiteInfo::Twitter))
+                    } else {
+                        (-1, None)
+                    };
+
+                    let file = File {
+                        id: row.id,
+                        site_id,
+                        site_info,
+                        site_id_str: site_id.to_string(),
+                        url: row.url.unwrap_or_default(),
+                        hash: Some(row.hash),
+                        distance: Some(dist),
+                        artists: row.artists,
+                        filename: row.filename.unwrap_or_default(),
+                        searched_hash: Some(query_hash),
+                    };
+
+                    vec![file]
+                }).fetch_one(&db).await;
+
+                tx.send(row).await.unwrap();
             }
         }
     }.in_current_span());

src/types.rs

@@ -8,7 +8,7 @@ use serde::{Deserialize, Serialize};
 pub struct ApiKey {
     pub id: i32,
     pub name: Option<String>,
-    pub owner_email: Option<String>,
+    pub owner_email: String,
     pub name_limit: i16,
     pub image_limit: i16,
     pub hash_limit: i16,

src/utils.rs

@@ -1,4 +1,3 @@
-use crate::models::Db;
 use crate::types::*;
 
 #[macro_export]
@@ -51,18 +50,17 @@ macro_rules! early_return {
 /// joined requests.
 #[tracing::instrument(skip(db))]
 pub async fn update_rate_limit(
-    db: Db<'_>,
+    db: &sqlx::PgPool,
     key_id: i32,
     key_group_limit: i16,
     group_name: &'static str,
     incr_by: i16,
-) -> Result<RateLimit, tokio_postgres::Error> {
+) -> Result<RateLimit, sqlx::Error> {
     let now = chrono::Utc::now();
     let timestamp = now.timestamp();
     let time_window = timestamp - (timestamp % 60);
 
-    let rows = db
+    let count: i16 = sqlx::query_scalar!(
-        .query(
         "INSERT INTO
             rate_limit (api_key_id, time_window, group_name, count)
         VALUES
@@ -70,12 +68,14 @@ pub async fn update_rate_limit(
         ON CONFLICT ON CONSTRAINT unique_window
             DO UPDATE set count = rate_limit.count + $4
         RETURNING rate_limit.count",
-            &[&key_id, &time_window, &group_name, &incr_by],
+        key_id,
+        time_window,
+        group_name,
+        incr_by
     )
+    .fetch_one(db)
     .await?;
 
-    let count: i16 = rows[0].get(0);
-
     if count > key_group_limit {
         Ok(RateLimit::Limited)
     } else {
@@ -85,54 +85,3 @@ pub async fn update_rate_limit(
         )))
     }
 }
-
-pub fn extract_rows(
-    rows: Vec<tokio_postgres::Row>,
-    hash: Option<&[u8]>,
-) -> impl IntoIterator<Item = File> + '_ {
-    rows.into_iter().map(move |row| {
-        let dbhash: i64 = row.get("hash");
-        let dbbytes = dbhash.to_be_bytes();
-
-        let (furaffinity_id, e621_id, twitter_id): (Option<i32>, Option<i32>, Option<i64>) = (
-            row.get("furaffinity_id"),
-            row.get("e621_id"),
-            row.get("twitter_id"),
-        );
-
-        let (site_id, site_info) = if let Some(fa_id) = furaffinity_id {
-            (
-                fa_id as i64,
-                Some(SiteInfo::FurAffinity(FurAffinityFile {
-                    file_id: row.get("file_id"),
-                })),
-            )
-        } else if let Some(e6_id) = e621_id {
-            (
-                e6_id as i64,
-                Some(SiteInfo::E621(E621File {
-                    sources: row.get("sources"),
-                })),
-            )
-        } else if let Some(t_id) = twitter_id {
-            (t_id, Some(SiteInfo::Twitter))
-        } else {
-            (-1, None)
-        };
-
-        File {
-            id: row.get("id"),
-            site_id,
-            site_info,
-            site_id_str: site_id.to_string(),
-            url: row.get("url"),
-            hash: Some(dbhash),
-            distance: hash
-                .map(|hash| hamming::distance_fast(&dbbytes, &hash).ok())
-                .flatten(),
-            artists: row.get("artists"),
-            filename: row.get("filename"),
-            searched_hash: None,
-        }
-    })
-}