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[package]
name = "kosync-rs"
version = "0.1.0"
edition = "2021"
license = "AGPL-3.0-or-later"
description = "Self-contained KOReader sync server compatible with koreader-sync-server"
[dependencies]
anyhow = "1"
axum = "0.7"
axum-server = { version = "0.7", features = ["tls-rustls"] }
bytes = "1"
clap = { version = "4", features = ["derive", "env"] }
http = "1"
rcgen = "0.13"
redis = "0.27"
reqwest = { version = "0.12", default-features = false, features = ["blocking", "rustls-tls"] }
rusqlite = { version = "0.32", features = ["bundled"] }
serde = { version = "1", features = ["derive"] }
serde_json = "1"
thiserror = "1"
tokio = { version = "1", features = ["macros", "net", "rt-multi-thread", "signal"] }
tracing = "0.1"
tracing-subscriber = { version = "0.3", features = ["env-filter"] }
[dev-dependencies]
tower = "0.5"
tempfile = "3"

38
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FROM --platform=$BUILDPLATFORM rust:1-bookworm AS builder
WORKDIR /src
RUN apt-get update \
&& apt-get install --no-install-recommends -y build-essential ca-certificates \
&& rm -rf /var/lib/apt/lists/*
COPY Cargo.toml Cargo.lock ./
COPY migrations ./migrations
COPY src ./src
COPY tests ./tests
RUN cargo build --release --locked
FROM debian:bookworm-slim
RUN apt-get update \
&& apt-get install --no-install-recommends -y ca-certificates \
&& rm -rf /var/lib/apt/lists/* \
&& useradd --system --uid 10001 --home-dir /data --create-home kosync
COPY --from=builder /src/target/release/kosync-rs /usr/local/bin/kosync-rs
USER kosync
WORKDIR /data
ENV KOSYNC_DB=/data/kosync.sqlite3
ENV KOSYNC_TLS=auto
ENV ENABLE_USER_REGISTRATION=true
ENV RUST_LOG=info
EXPOSE 7200 17200
VOLUME ["/data"]
HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
CMD ["kosync-rs", "healthcheck", "--url", "https://127.0.0.1:7200/healthcheck", "--insecure"]
ENTRYPOINT ["kosync-rs"]
CMD ["serve"]

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# kosync-rs
`kosync-rs` is a self-contained Rust replacement for
`koreader/koreader-sync-server`. It keeps the KOReader sync API compatible while
replacing the old Redis, OpenResty/nginx, Lua/Gin, and runit stack with one
binary and one SQLite database.
Compatibility target:
- Upstream checkout: `../koreader-sync-server`
- Upstream commit: `597e0648be0894c535a222f192d7bd583fb3b2dc`
- Target platforms: Linux `amd64` and Linux `aarch64`
## Quick start
```sh
docker compose up -d --build
curl -k -H "Accept: application/vnd.koreader.v1+json" https://127.0.0.1:7200/healthcheck
```
The compose file stores data in `./data/kosync.sqlite3`, enables user
registration, exposes HTTPS on `7200`, and exposes plain HTTP on `17200` for
reverse proxies.
## Binary usage
```sh
kosync-rs serve
kosync-rs init-db --db ./data/kosync.sqlite3
kosync-rs healthcheck --url https://127.0.0.1:7200/healthcheck --insecure
```
Useful environment variables:
```text
KOSYNC_DB=./data/kosync.sqlite3
KOSYNC_HTTP_ADDR=0.0.0.0:17200
KOSYNC_HTTPS_ADDR=0.0.0.0:7200
KOSYNC_TLS=auto
KOSYNC_TLS_CERT=/path/to/cert.pem
KOSYNC_TLS_KEY=/path/to/key.pem
ENABLE_USER_REGISTRATION=true
RUST_LOG=info
```
`ENABLE_USER_REGISTRATION` matches the old server: registration is enabled only
when the value is exactly `true` or `1`.
## API
Implemented routes:
```text
POST /users/create
GET /users/auth
PUT /syncs/progress
GET /syncs/progress/:document
GET /healthcheck
```
Authenticated routes use:
```text
x-auth-user: <username>
x-auth-key: <client key>
```
The server stores and compares the auth key exactly as supplied, matching the
original implementation.
## Migrating from the old Docker container
Keep the old container running while importing. The old Redis usually listens
on `127.0.0.1:6379` inside that container, so the helper script joins the old
container's network namespace.
```sh
scripts/import-from-old-redis.sh \
--old-container kosync \
--sqlite ./data/kosync.sqlite3 \
--image kosync-rs:latest
```
Then stop the old container and start the new compose stack:
```sh
docker stop kosync
docker compose up -d
```
Export SQLite data back to the old Redis format:
```sh
scripts/export-to-old-redis.sh \
--old-container kosync \
--sqlite ./data/kosync.sqlite3 \
--image kosync-rs:latest
```
The export script will not flush Redis unless `--flush-target` is passed.
## Backups
SQLite backup:
```sh
sqlite3 ./data/kosync.sqlite3 ".backup './data/kosync-backup.sqlite3'"
```
Portable JSON backup:
```sh
kosync-rs export-json --db ./data/kosync.sqlite3 --output backup.json
kosync-rs import-json --db ./data/kosync.sqlite3 --input backup.json
```
## License
This project is intended to be compatible with the AGPL-3.0 upstream server and
is licensed as AGPL-3.0-or-later.

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services:
kosync-rs:
image: kosync-rs:latest
build:
context: .
container_name: kosync-rs
restart: unless-stopped
ports:
- "7200:7200"
- "17200:17200"
environment:
ENABLE_USER_REGISTRATION: "true"
KOSYNC_DB: /data/kosync.sqlite3
KOSYNC_TLS: auto
RUST_LOG: info
volumes:
- ./data:/data

19
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CREATE TABLE IF NOT EXISTS users (
username TEXT PRIMARY KEY NOT NULL,
key TEXT NOT NULL,
created_at INTEGER NOT NULL DEFAULT (unixepoch())
);
CREATE TABLE IF NOT EXISTS progress (
username TEXT NOT NULL,
document TEXT NOT NULL,
percentage REAL,
progress TEXT,
device TEXT,
device_id TEXT,
timestamp INTEGER,
PRIMARY KEY (username, document),
FOREIGN KEY (username) REFERENCES users(username) ON DELETE CASCADE
);
CREATE INDEX IF NOT EXISTS idx_progress_username ON progress(username);

78
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#!/bin/sh
set -eu
OLD_CONTAINER=kosync
SQLITE=./data/kosync.sqlite3
IMAGE=kosync-rs:latest
REDIS_URL=redis://127.0.0.1:6379/1
PULL=1
FLUSH_TARGET=0
usage() {
echo "Usage: $0 [--old-container NAME] [--sqlite PATH] [--image IMAGE] [--redis-url URL] [--flush-target] [--no-pull]" >&2
}
while [ "$#" -gt 0 ]; do
case "$1" in
--old-container)
OLD_CONTAINER=$2
shift 2
;;
--sqlite)
SQLITE=$2
shift 2
;;
--image)
IMAGE=$2
shift 2
;;
--redis-url)
REDIS_URL=$2
shift 2
;;
--flush-target)
FLUSH_TARGET=1
shift
;;
--no-pull)
PULL=0
shift
;;
-h|--help)
usage
exit 0
;;
*)
usage
exit 2
;;
esac
done
case "$SQLITE" in
/*) SQLITE_ABS=$SQLITE ;;
*) SQLITE_ABS=$(pwd)/$SQLITE ;;
esac
SQLITE_DIR=$(dirname "$SQLITE_ABS")
SQLITE_BASE=$(basename "$SQLITE_ABS")
if [ "$PULL" -eq 1 ]; then
docker pull "$IMAGE"
fi
echo "image: $IMAGE"
echo "old container: $OLD_CONTAINER"
echo "redis url: $REDIS_URL"
echo "sqlite: $SQLITE_ABS"
set -- export-redis --redis-url "$REDIS_URL" --db "/data/$SQLITE_BASE"
if [ "$FLUSH_TARGET" -eq 1 ]; then
set -- "$@" --flush-target
fi
docker run --rm \
--network "container:$OLD_CONTAINER" \
-v "$SQLITE_DIR:/data" \
"$IMAGE" \
"$@"

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#!/bin/sh
set -eu
OLD_CONTAINER=kosync
SQLITE=./data/kosync.sqlite3
IMAGE=kosync-rs:latest
REDIS_URL=redis://127.0.0.1:6379/1
PULL=1
usage() {
echo "Usage: $0 [--old-container NAME] [--sqlite PATH] [--image IMAGE] [--redis-url URL] [--no-pull]" >&2
}
while [ "$#" -gt 0 ]; do
case "$1" in
--old-container)
OLD_CONTAINER=$2
shift 2
;;
--sqlite)
SQLITE=$2
shift 2
;;
--image)
IMAGE=$2
shift 2
;;
--redis-url)
REDIS_URL=$2
shift 2
;;
--no-pull)
PULL=0
shift
;;
-h|--help)
usage
exit 0
;;
*)
usage
exit 2
;;
esac
done
case "$SQLITE" in
/*) SQLITE_ABS=$SQLITE ;;
*) SQLITE_ABS=$(pwd)/$SQLITE ;;
esac
SQLITE_DIR=$(dirname "$SQLITE_ABS")
SQLITE_BASE=$(basename "$SQLITE_ABS")
mkdir -p "$SQLITE_DIR"
if [ "$PULL" -eq 1 ]; then
docker pull "$IMAGE"
fi
echo "image: $IMAGE"
echo "old container: $OLD_CONTAINER"
echo "redis url: $REDIS_URL"
echo "sqlite: $SQLITE_ABS"
docker run --rm \
--network "container:$OLD_CONTAINER" \
-v "$SQLITE_DIR:/data" \
"$IMAGE" \
import-redis \
--redis-url "$REDIS_URL" \
--db "/data/$SQLITE_BASE"

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use std::net::SocketAddr;
use std::path::PathBuf;
use clap::{Parser, Subcommand, ValueEnum};
#[derive(Debug, Parser)]
#[command(author, version, about)]
pub struct Cli {
#[command(subcommand)]
pub command: Option<Command>,
}
#[derive(Debug, Subcommand)]
pub enum Command {
Serve(ServeArgs),
InitDb(DbArgs),
ImportRedis(RedisImportArgs),
ExportRedis(RedisExportArgs),
ExportJson(JsonExportArgs),
ImportJson(JsonImportArgs),
Healthcheck(HealthcheckArgs),
}
#[derive(Clone, Debug, Parser)]
pub struct ServeArgs {
#[arg(long, env = "KOSYNC_DB", default_value = "./data/kosync.sqlite3")]
pub db: PathBuf,
#[arg(long, env = "KOSYNC_HTTP_ADDR", default_value = "0.0.0.0:17200")]
pub http_addr: SocketAddr,
#[arg(long, env = "KOSYNC_HTTPS_ADDR", default_value = "0.0.0.0:7200")]
pub https_addr: SocketAddr,
#[arg(long, env = "KOSYNC_TLS", value_enum, default_value = "auto")]
pub tls: TlsMode,
#[arg(long, env = "KOSYNC_TLS_CERT")]
pub tls_cert: Option<PathBuf>,
#[arg(long, env = "KOSYNC_TLS_KEY")]
pub tls_key: Option<PathBuf>,
#[arg(long, env = "ENABLE_USER_REGISTRATION")]
pub enable_user_registration: Option<String>,
}
#[derive(Clone, Debug, ValueEnum)]
pub enum TlsMode {
Off,
Auto,
On,
}
#[derive(Debug, Parser)]
pub struct DbArgs {
#[arg(long, env = "KOSYNC_DB", default_value = "./data/kosync.sqlite3")]
pub db: PathBuf,
}
#[derive(Debug, Parser)]
pub struct RedisImportArgs {
#[arg(long, env = "KOSYNC_DB", default_value = "./data/kosync.sqlite3")]
pub db: PathBuf,
#[arg(long, default_value = "redis://127.0.0.1:6379/1")]
pub redis_url: String,
}
#[derive(Debug, Parser)]
pub struct RedisExportArgs {
#[arg(long, env = "KOSYNC_DB", default_value = "./data/kosync.sqlite3")]
pub db: PathBuf,
#[arg(long, default_value = "redis://127.0.0.1:6379/1")]
pub redis_url: String,
#[arg(long)]
pub flush_target: bool,
}
#[derive(Debug, Parser)]
pub struct JsonExportArgs {
#[arg(long, env = "KOSYNC_DB", default_value = "./data/kosync.sqlite3")]
pub db: PathBuf,
#[arg(long)]
pub output: PathBuf,
}
#[derive(Debug, Parser)]
pub struct JsonImportArgs {
#[arg(long, env = "KOSYNC_DB", default_value = "./data/kosync.sqlite3")]
pub db: PathBuf,
#[arg(long)]
pub input: PathBuf,
}
#[derive(Debug, Parser)]
pub struct HealthcheckArgs {
#[arg(long, default_value = "https://127.0.0.1:7200/healthcheck")]
pub url: String,
#[arg(long)]
pub insecure: bool,
}
impl ServeArgs {
pub fn registration_enabled(&self) -> bool {
matches!(
self.enable_user_registration.as_deref(),
Some("true") | Some("1")
)
}
}

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use axum::response::{IntoResponse, Response};
use http::StatusCode;
use serde::Serialize;
#[derive(Clone, Copy, Debug)]
pub enum AppError {
NoRedis,
Internal,
Unauthorized,
UserExists,
InvalidRequest,
DocumentMissing,
RegistrationDisabled,
}
#[derive(Serialize)]
struct ErrorBody {
code: u16,
message: &'static str,
}
impl AppError {
pub fn status(self) -> StatusCode {
match self {
Self::NoRedis => StatusCode::BAD_GATEWAY,
Self::Internal => StatusCode::BAD_GATEWAY,
Self::Unauthorized => StatusCode::UNAUTHORIZED,
Self::UserExists => StatusCode::PAYMENT_REQUIRED,
Self::InvalidRequest => StatusCode::FORBIDDEN,
Self::DocumentMissing => StatusCode::FORBIDDEN,
Self::RegistrationDisabled => StatusCode::PAYMENT_REQUIRED,
}
}
pub fn code(self) -> u16 {
match self {
Self::NoRedis => 1000,
Self::Internal => 2000,
Self::Unauthorized => 2001,
Self::UserExists => 2002,
Self::InvalidRequest => 2003,
Self::DocumentMissing => 2004,
Self::RegistrationDisabled => 2005,
}
}
pub fn message(self) -> &'static str {
match self {
Self::NoRedis => "Cannot connect to redis server.",
Self::Internal => "Unknown server error.",
Self::Unauthorized => "Unauthorized",
Self::UserExists => "Username is already registered.",
Self::InvalidRequest => "Invalid request",
Self::DocumentMissing => "Field 'document' not provided.",
Self::RegistrationDisabled => "User registration is disabled.",
}
}
}
impl IntoResponse for AppError {
fn into_response(self) -> Response {
let body = axum::Json(ErrorBody {
code: self.code(),
message: self.message(),
});
(self.status(), body).into_response()
}
}

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use axum::body::Bytes;
use axum::extract::{Path, State};
use axum::http::{HeaderMap, StatusCode};
use axum::response::{IntoResponse, Response};
use axum::routing::{get, post, put};
use axum::Router;
use serde::Serialize;
use serde_json::{Map, Value};
use crate::error::AppError;
use crate::store::{unix_timestamp, ProgressUpdate, Store, StoreError};
use crate::validation::{is_valid_field, is_valid_key_field};
#[derive(Clone)]
pub struct AppState {
pub store: Store,
pub registration_enabled: bool,
}
#[derive(Serialize)]
struct HealthBody {
state: &'static str,
}
#[derive(Serialize)]
struct UserCreatedBody {
username: String,
}
#[derive(Serialize)]
struct AuthBody {
authorized: &'static str,
}
#[derive(Serialize)]
struct UpdateProgressBody {
document: String,
timestamp: i64,
}
pub fn router(state: AppState) -> Router {
Router::new()
.route("/healthcheck", get(healthcheck))
.route("/users/create", post(create_user))
.route("/users/auth", get(auth_user))
.route("/syncs/progress", put(update_progress))
.route("/syncs/progress/:document", get(get_progress))
.with_state(state)
}
async fn healthcheck() -> Response {
axum::Json(HealthBody { state: "OK" }).into_response()
}
async fn create_user(State(state): State<AppState>, body: Bytes) -> Result<Response, AppError> {
if !state.registration_enabled {
return Err(AppError::RegistrationDisabled);
}
let value = parse_json(&body)?;
let username = required_string(&value, "username").ok_or(AppError::InvalidRequest)?;
let password = required_string(&value, "password").ok_or(AppError::InvalidRequest)?;
if !is_valid_key_field(&username) || !is_valid_field(&password) {
return Err(AppError::InvalidRequest);
}
match state.store.create_user(username.clone(), password).await {
Ok(()) => Ok((
StatusCode::CREATED,
axum::Json(UserCreatedBody { username }),
)
.into_response()),
Err(StoreError::DuplicateUser) => Err(AppError::UserExists),
Err(err) => {
tracing::error!(error = %err, "failed to create user");
Err(AppError::Internal)
}
}
}
async fn auth_user(
State(state): State<AppState>,
headers: HeaderMap,
) -> Result<Response, AppError> {
authorize(&state.store, &headers).await?;
Ok(axum::Json(AuthBody { authorized: "OK" }).into_response())
}
async fn update_progress(
State(state): State<AppState>,
headers: HeaderMap,
body: Bytes,
) -> Result<Response, AppError> {
let username = authorize(&state.store, &headers).await?;
let value = parse_json(&body)?;
let document = required_string(&value, "document").ok_or(AppError::DocumentMissing)?;
if !is_valid_key_field(&document) {
return Err(AppError::DocumentMissing);
}
let percentage = percentage_field(&value).ok_or(AppError::InvalidRequest)?;
let progress = required_string(&value, "progress").ok_or(AppError::InvalidRequest)?;
let device = required_string(&value, "device").ok_or(AppError::InvalidRequest)?;
let device_id = optional_string(&value, "device_id");
let timestamp = unix_timestamp();
state
.store
.upsert_progress(ProgressUpdate {
username,
document: document.clone(),
percentage,
progress,
device,
device_id,
timestamp,
})
.await
.map_err(|err| {
tracing::error!(error = %err, "failed to update progress");
AppError::Internal
})?;
Ok(axum::Json(UpdateProgressBody {
document,
timestamp,
})
.into_response())
}
async fn get_progress(
State(state): State<AppState>,
headers: HeaderMap,
Path(document): Path<String>,
) -> Result<Response, AppError> {
let username = authorize(&state.store, &headers).await?;
if !is_valid_key_field(&document) {
return Err(AppError::DocumentMissing);
}
let Some(row) = state
.store
.get_progress(username, document)
.await
.map_err(|err| {
tracing::error!(error = %err, "failed to read progress");
AppError::Internal
})?
else {
return Ok(axum::Json(Value::Object(Map::new())).into_response());
};
let mut body = Map::new();
if let Some(percentage) = row.percentage {
body.insert("percentage".to_string(), Value::from(percentage));
}
if let Some(progress) = row.progress {
body.insert("progress".to_string(), Value::from(progress));
}
if let Some(device) = row.device {
body.insert("device".to_string(), Value::from(device));
}
if let Some(device_id) = row.device_id {
body.insert("device_id".to_string(), Value::from(device_id));
}
if let Some(timestamp) = row.timestamp {
body.insert("timestamp".to_string(), Value::from(timestamp));
}
if !body.is_empty() {
body.insert("document".to_string(), Value::from(row.document));
}
Ok(axum::Json(Value::Object(body)).into_response())
}
async fn authorize(store: &Store, headers: &HeaderMap) -> Result<String, AppError> {
let username = header_string(headers, "x-auth-user").ok_or(AppError::Unauthorized)?;
let auth_key = header_string(headers, "x-auth-key").ok_or(AppError::Unauthorized)?;
if !is_valid_key_field(&username) || !is_valid_field(&auth_key) {
return Err(AppError::Unauthorized);
}
match store.auth_key(username.clone()).await {
Ok(Some(stored_key)) if stored_key == auth_key => Ok(username),
Ok(_) => Err(AppError::Unauthorized),
Err(err) => {
tracing::error!(error = %err, "failed to authorize user");
Err(AppError::Internal)
}
}
}
fn parse_json(body: &[u8]) -> Result<Value, AppError> {
serde_json::from_slice(body).map_err(|_| AppError::InvalidRequest)
}
fn header_string(headers: &HeaderMap, name: &str) -> Option<String> {
headers.get(name)?.to_str().ok().map(ToOwned::to_owned)
}
fn required_string(value: &Value, field: &str) -> Option<String> {
value.get(field)?.as_str().map(ToOwned::to_owned)
}
fn optional_string(value: &Value, field: &str) -> Option<String> {
value
.get(field)
.and_then(Value::as_str)
.map(ToOwned::to_owned)
}
fn percentage_field(value: &Value) -> Option<f64> {
match value.get("percentage")? {
Value::Number(number) => number.as_f64(),
Value::String(text) => text.parse::<f64>().ok(),
_ => None,
}
}

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pub mod config;
pub mod error;
pub mod http;
pub mod migrate;
pub mod store;
pub mod validation;

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use std::fs;
use std::path::{Path, PathBuf};
use anyhow::{Context, Result};
use axum_server::tls_rustls::RustlsConfig;
use clap::Parser;
use kosync_rs::config::{Cli, Command, ServeArgs, TlsMode};
use kosync_rs::http::{router, AppState};
use kosync_rs::migrate;
use kosync_rs::store::Store;
use rcgen::generate_simple_self_signed;
use tracing_subscriber::EnvFilter;
#[tokio::main]
async fn main() -> Result<()> {
init_logging();
let cli = Cli::parse();
match cli
.command
.unwrap_or_else(|| Command::Serve(ServeArgs::parse_from(["kosync-rs"])))
{
Command::Serve(args) => serve(args).await,
Command::InitDb(args) => {
let store = Store::new(args.db);
store.init().await?;
println!("initialized {}", store.path().display());
Ok(())
}
Command::ImportRedis(args) => {
let store = Store::new(args.db);
store.init().await?;
let stats = migrate::import_redis(&store, &args.redis_url).await?;
println!(
"imported users={} progress={} malformed_keys_skipped={} rows_overwritten={}",
stats.users_imported,
stats.progress_imported,
stats.malformed_keys_skipped,
stats.rows_overwritten
);
Ok(())
}
Command::ExportRedis(args) => {
let store = Store::new(args.db);
store.init().await?;
let stats = migrate::export_redis(&store, &args.redis_url, args.flush_target).await?;
println!(
"exported users={} progress={}",
stats.users_exported, stats.progress_exported
);
Ok(())
}
Command::ExportJson(args) => {
let store = Store::new(args.db);
store.init().await?;
migrate::export_json(&store, &args.output).await?;
println!("wrote {}", args.output.display());
Ok(())
}
Command::ImportJson(args) => {
let store = Store::new(args.db);
store.init().await?;
migrate::import_json(&store, &args.input).await?;
println!("imported {}", args.input.display());
Ok(())
}
Command::Healthcheck(args) => healthcheck(&args.url, args.insecure),
}
}
async fn serve(args: ServeArgs) -> Result<()> {
let store = Store::new(args.db.clone());
store.init().await?;
let state = AppState {
store,
registration_enabled: args.registration_enabled(),
};
let app = router(state);
tracing::info!(addr = %args.http_addr, "starting HTTP listener");
let http = axum_server::bind(args.http_addr).serve(app.clone().into_make_service());
match args.tls {
TlsMode::Off => {
http.await.context("HTTP listener failed")?;
}
TlsMode::Auto | TlsMode::On => {
let (cert, key) = tls_paths(&args)?;
ensure_self_signed_cert(&cert, &key)?;
let tls_config = RustlsConfig::from_pem_file(cert, key).await?;
tracing::info!(addr = %args.https_addr, "starting HTTPS listener");
let https = axum_server::bind_rustls(args.https_addr, tls_config)
.serve(app.into_make_service());
tokio::try_join!(http, https).context("server listener failed")?;
}
}
Ok(())
}
fn tls_paths(args: &ServeArgs) -> Result<(PathBuf, PathBuf)> {
match (&args.tls_cert, &args.tls_key) {
(Some(cert), Some(key)) => Ok((cert.clone(), key.clone())),
(None, None) => {
let dir = args
.db
.parent()
.filter(|path| !path.as_os_str().is_empty())
.unwrap_or_else(|| Path::new("."));
Ok((dir.join("kosync-rs.crt.pem"), dir.join("kosync-rs.key.pem")))
}
_ => anyhow::bail!("KOSYNC_TLS_CERT and KOSYNC_TLS_KEY must be provided together"),
}
}
fn ensure_self_signed_cert(cert: &Path, key: &Path) -> Result<()> {
if cert.exists() && key.exists() {
return Ok(());
}
if let Some(parent) = cert.parent() {
if !parent.as_os_str().is_empty() {
fs::create_dir_all(parent)?;
}
}
if let Some(parent) = key.parent() {
if !parent.as_os_str().is_empty() {
fs::create_dir_all(parent)?;
}
}
let generated =
generate_simple_self_signed(vec!["localhost".to_string(), "127.0.0.1".to_string()])?;
fs::write(cert, generated.cert.pem())?;
fs::write(key, generated.key_pair.serialize_pem())?;
Ok(())
}
fn healthcheck(url: &str, insecure: bool) -> Result<()> {
let client = reqwest::blocking::Client::builder()
.danger_accept_invalid_certs(insecure)
.build()?;
let response = client.get(url).send()?;
if !response.status().is_success() {
anyhow::bail!("healthcheck returned {}", response.status());
}
let body = response.text()?;
if !body.contains("\"state\":\"OK\"") && !body.contains("\"state\": \"OK\"") {
anyhow::bail!("healthcheck response did not contain state OK");
}
println!("OK");
Ok(())
}
fn init_logging() {
let filter = EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info"));
tracing_subscriber::fmt().with_env_filter(filter).init();
}

220
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use std::fs;
use std::path::Path;
use anyhow::{anyhow, Context, Result};
use redis::Commands;
use crate::store::{Backup, ProgressRow, Store, UserRow};
#[derive(Debug, Default)]
pub struct ImportStats {
pub users_imported: usize,
pub progress_imported: usize,
pub malformed_keys_skipped: usize,
pub rows_overwritten: usize,
}
#[derive(Debug, Default)]
pub struct ExportStats {
pub users_exported: usize,
pub progress_exported: usize,
}
pub async fn import_json(store: &Store, input: &Path) -> Result<()> {
let data = fs::read_to_string(input)
.with_context(|| format!("failed to read JSON backup {}", input.display()))?;
let backup: Backup = serde_json::from_str(&data).context("failed to parse JSON backup")?;
if backup.version != 1 {
return Err(anyhow!(
"unsupported JSON backup version {}",
backup.version
));
}
store.import_backup(backup).await?;
Ok(())
}
pub async fn export_json(store: &Store, output: &Path) -> Result<()> {
if let Some(parent) = output.parent() {
if !parent.as_os_str().is_empty() {
fs::create_dir_all(parent)?;
}
}
let backup = store.export_backup().await?;
let data = serde_json::to_string_pretty(&backup)?;
fs::write(output, data).with_context(|| format!("failed to write {}", output.display()))?;
Ok(())
}
pub async fn import_redis(store: &Store, redis_url: &str) -> Result<ImportStats> {
let redis_url = redis_url.to_string();
let backup = tokio::task::spawn_blocking(move || read_redis_backup(&redis_url)).await??;
let mut stats = backup.0;
stats.rows_overwritten = count_existing_rows(store, &backup.1).await?;
store.import_backup(backup.1).await?;
Ok(stats)
}
pub async fn export_redis(
store: &Store,
redis_url: &str,
flush_target: bool,
) -> Result<ExportStats> {
let backup = store.export_backup().await?;
let redis_url = redis_url.to_string();
tokio::task::spawn_blocking(move || write_redis_backup(&redis_url, flush_target, backup))
.await?
}
fn read_redis_backup(redis_url: &str) -> Result<(ImportStats, Backup)> {
let client = redis::Client::open(redis_url)?;
let mut conn = client.get_connection()?;
let mut stats = ImportStats::default();
let user_keys = scan_keys(&mut conn, "user:*:key")?;
let mut users = Vec::new();
for key in user_keys {
let Some(username) = parse_user_key(&key) else {
stats.malformed_keys_skipped += 1;
continue;
};
let user_key: String = conn
.get(&key)
.with_context(|| format!("failed to read Redis key {key}"))?;
users.push(UserRow {
username,
key: user_key,
created_at: 0,
});
stats.users_imported += 1;
}
let progress_keys = scan_keys(&mut conn, "user:*:document:*")?;
let mut progress = Vec::new();
for key in progress_keys {
let Some((username, document)) = parse_document_key(&key) else {
stats.malformed_keys_skipped += 1;
continue;
};
let values: Vec<Option<String>> = redis::cmd("HMGET")
.arg(&key)
.arg("percentage")
.arg("progress")
.arg("device")
.arg("device_id")
.arg("timestamp")
.query(&mut conn)
.with_context(|| format!("failed to read Redis hash {key}"))?;
let row = ProgressRow {
username,
document,
percentage: values
.first()
.and_then(|value| value.as_deref())
.and_then(|value| value.parse::<f64>().ok()),
progress: values.get(1).cloned().flatten(),
device: values.get(2).cloned().flatten(),
device_id: values.get(3).cloned().flatten(),
timestamp: values
.get(4)
.and_then(|value| value.as_deref())
.and_then(|value| value.parse::<i64>().ok()),
};
progress.push(row);
stats.progress_imported += 1;
}
Ok((
stats,
Backup {
version: 1,
users,
progress,
},
))
}
async fn count_existing_rows(store: &Store, backup: &Backup) -> Result<usize> {
let mut count = 0;
for user in &backup.users {
if store.auth_key(user.username.clone()).await?.is_some() {
count += 1;
}
}
for row in &backup.progress {
if store
.get_progress(row.username.clone(), row.document.clone())
.await?
.is_some()
{
count += 1;
}
}
Ok(count)
}
fn write_redis_backup(redis_url: &str, flush_target: bool, backup: Backup) -> Result<ExportStats> {
let client = redis::Client::open(redis_url)?;
let mut conn = client.get_connection()?;
if flush_target {
redis::cmd("FLUSHDB").query::<()>(&mut conn)?;
}
let mut stats = ExportStats::default();
for user in backup.users {
let key = format!("user:{}:key", user.username);
conn.set::<_, _, ()>(key, user.key)?;
stats.users_exported += 1;
}
for row in backup.progress {
let key = format!("user:{}:document:{}", row.username, row.document);
let mut command = redis::cmd("HMSET");
command.arg(&key);
if let Some(percentage) = row.percentage {
command.arg("percentage").arg(percentage);
}
if let Some(progress) = row.progress {
command.arg("progress").arg(progress);
}
if let Some(device) = row.device {
command.arg("device").arg(device);
}
if let Some(device_id) = row.device_id {
command.arg("device_id").arg(device_id);
}
if let Some(timestamp) = row.timestamp {
command.arg("timestamp").arg(timestamp);
}
command.query::<()>(&mut conn)?;
stats.progress_exported += 1;
}
Ok(stats)
}
fn scan_keys(conn: &mut redis::Connection, pattern: &str) -> Result<Vec<String>> {
let iter: redis::Iter<'_, String> = conn.scan_match(pattern)?;
Ok(iter.collect())
}
fn parse_user_key(key: &str) -> Option<String> {
let username = key.strip_prefix("user:")?.strip_suffix(":key")?;
if username.is_empty() || username.contains(':') {
return None;
}
Some(username.to_string())
}
fn parse_document_key(key: &str) -> Option<(String, String)> {
let rest = key.strip_prefix("user:")?;
let (username, document) = rest.split_once(":document:")?;
if username.is_empty()
|| document.is_empty()
|| username.contains(':')
|| document.contains(':')
{
return None;
}
Some((username.to_string(), document.to_string()))
}

287
src/store.rs Normal file
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use std::fs;
use std::path::{Path, PathBuf};
use std::time::{SystemTime, UNIX_EPOCH};
use rusqlite::{params, Connection, OptionalExtension};
use serde::{Deserialize, Serialize};
use thiserror::Error;
use tokio::task;
const SCHEMA: &str = include_str!("../migrations/001_init.sql");
#[derive(Clone, Debug)]
pub struct Store {
path: PathBuf,
}
#[derive(Debug, Error)]
pub enum StoreError {
#[error("duplicate user")]
DuplicateUser,
#[error("blocking task failed: {0}")]
Join(#[from] task::JoinError),
#[error("sqlite error: {0}")]
Sqlite(#[from] rusqlite::Error),
#[error("io error: {0}")]
Io(#[from] std::io::Error),
}
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct UserRow {
pub username: String,
pub key: String,
pub created_at: i64,
}
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct ProgressRow {
pub username: String,
pub document: String,
pub percentage: Option<f64>,
pub progress: Option<String>,
pub device: Option<String>,
pub device_id: Option<String>,
pub timestamp: Option<i64>,
}
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct Backup {
pub version: u8,
pub users: Vec<UserRow>,
pub progress: Vec<ProgressRow>,
}
#[derive(Clone, Debug)]
pub struct ProgressUpdate {
pub username: String,
pub document: String,
pub percentage: f64,
pub progress: String,
pub device: String,
pub device_id: Option<String>,
pub timestamp: i64,
}
impl Store {
pub fn new(path: impl Into<PathBuf>) -> Self {
Self { path: path.into() }
}
pub fn path(&self) -> &Path {
&self.path
}
pub async fn init(&self) -> Result<(), StoreError> {
let path = self.path.clone();
task::spawn_blocking(move || init_db(&path)).await?
}
pub async fn create_user(&self, username: String, key: String) -> Result<(), StoreError> {
let path = self.path.clone();
task::spawn_blocking(move || {
let conn = open_db(&path)?;
let inserted = conn.execute(
"INSERT OR IGNORE INTO users (username, key) VALUES (?1, ?2)",
params![username, key],
)?;
if inserted == 0 {
return Err(StoreError::DuplicateUser);
}
Ok(())
})
.await?
}
pub async fn auth_key(&self, username: String) -> Result<Option<String>, StoreError> {
let path = self.path.clone();
task::spawn_blocking(move || {
let conn = open_db(&path)?;
let key = conn
.query_row(
"SELECT key FROM users WHERE username = ?1",
params![username],
|row| row.get(0),
)
.optional()?;
Ok(key)
})
.await?
}
pub async fn upsert_progress(&self, update: ProgressUpdate) -> Result<(), StoreError> {
let path = self.path.clone();
task::spawn_blocking(move || {
let conn = open_db(&path)?;
conn.execute(
"INSERT INTO progress
(username, document, percentage, progress, device, device_id, timestamp)
VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7)
ON CONFLICT(username, document) DO UPDATE SET
percentage = excluded.percentage,
progress = excluded.progress,
device = excluded.device,
device_id = excluded.device_id,
timestamp = excluded.timestamp",
params![
update.username,
update.document,
update.percentage,
update.progress,
update.device,
update.device_id,
update.timestamp
],
)?;
Ok(())
})
.await?
}
pub async fn get_progress(
&self,
username: String,
document: String,
) -> Result<Option<ProgressRow>, StoreError> {
let path = self.path.clone();
task::spawn_blocking(move || {
let conn = open_db(&path)?;
let row = conn
.query_row(
"SELECT username, document, percentage, progress, device, device_id, timestamp
FROM progress
WHERE username = ?1 AND document = ?2",
params![username, document],
read_progress_row,
)
.optional()?;
Ok(row)
})
.await?
}
pub async fn list_users(&self) -> Result<Vec<UserRow>, StoreError> {
let path = self.path.clone();
task::spawn_blocking(move || {
let conn = open_db(&path)?;
let mut stmt =
conn.prepare("SELECT username, key, created_at FROM users ORDER BY username")?;
let rows = stmt
.query_map([], |row| {
Ok(UserRow {
username: row.get(0)?,
key: row.get(1)?,
created_at: row.get(2)?,
})
})?
.collect::<Result<Vec<_>, _>>()?;
Ok(rows)
})
.await?
}
pub async fn list_progress(&self) -> Result<Vec<ProgressRow>, StoreError> {
let path = self.path.clone();
task::spawn_blocking(move || {
let conn = open_db(&path)?;
let mut stmt = conn.prepare(
"SELECT username, document, percentage, progress, device, device_id, timestamp
FROM progress
ORDER BY username, document",
)?;
let rows = stmt
.query_map([], read_progress_row)?
.collect::<Result<Vec<_>, _>>()?;
Ok(rows)
})
.await?
}
pub async fn import_backup(&self, backup: Backup) -> Result<(), StoreError> {
let path = self.path.clone();
task::spawn_blocking(move || {
let mut conn = open_db(&path)?;
let tx = conn.transaction()?;
for user in backup.users {
tx.execute(
"INSERT INTO users (username, key, created_at)
VALUES (?1, ?2, ?3)
ON CONFLICT(username) DO UPDATE SET
key = excluded.key,
created_at = excluded.created_at",
params![user.username, user.key, user.created_at],
)?;
}
for progress in backup.progress {
tx.execute(
"INSERT INTO progress
(username, document, percentage, progress, device, device_id, timestamp)
VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7)
ON CONFLICT(username, document) DO UPDATE SET
percentage = excluded.percentage,
progress = excluded.progress,
device = excluded.device,
device_id = excluded.device_id,
timestamp = excluded.timestamp",
params![
progress.username,
progress.document,
progress.percentage,
progress.progress,
progress.device,
progress.device_id,
progress.timestamp
],
)?;
}
tx.commit()?;
Ok(())
})
.await?
}
pub async fn export_backup(&self) -> Result<Backup, StoreError> {
Ok(Backup {
version: 1,
users: self.list_users().await?,
progress: self.list_progress().await?,
})
}
}
pub fn unix_timestamp() -> i64 {
SystemTime::now()
.duration_since(UNIX_EPOCH)
.unwrap_or_default()
.as_secs() as i64
}
fn init_db(path: &Path) -> Result<(), StoreError> {
if let Some(parent) = path.parent() {
if !parent.as_os_str().is_empty() {
fs::create_dir_all(parent)?;
}
}
let conn = open_db(path)?;
conn.pragma_update(None, "journal_mode", "WAL")?;
conn.pragma_update(None, "synchronous", "NORMAL")?;
conn.execute_batch(SCHEMA)?;
Ok(())
}
fn open_db(path: &Path) -> Result<Connection, StoreError> {
let conn = Connection::open(path)?;
conn.pragma_update(None, "foreign_keys", "ON")?;
Ok(conn)
}
fn read_progress_row(row: &rusqlite::Row<'_>) -> rusqlite::Result<ProgressRow> {
Ok(ProgressRow {
username: row.get(0)?,
document: row.get(1)?,
percentage: row.get(2)?,
progress: row.get(3)?,
device: row.get(4)?,
device_id: row.get(5)?,
timestamp: row.get(6)?,
})
}

7
src/validation.rs Normal file
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pub fn is_valid_field(value: &str) -> bool {
!value.is_empty()
}
pub fn is_valid_key_field(value: &str) -> bool {
is_valid_field(value) && !value.contains(':')
}

264
tests/api.rs Normal file
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use axum::body::{to_bytes, Body};
use axum::http::{Request, StatusCode};
use serde_json::{json, Value};
use tempfile::TempDir;
use tower::ServiceExt;
use kosync_rs::http::{router, AppState};
use kosync_rs::store::Store;
async fn test_app(registration_enabled: bool) -> (axum::Router, TempDir) {
let tmp = TempDir::new().unwrap();
let db = tmp.path().join("kosync.sqlite3");
let store = Store::new(db);
store.init().await.unwrap();
let app = router(AppState {
store,
registration_enabled,
});
(app, tmp)
}
async fn hit(
app: axum::Router,
method: &str,
path: &str,
auth: Option<(&str, &str)>,
body: Option<Value>,
) -> (StatusCode, Value) {
let mut builder = Request::builder().method(method).uri(path);
if let Some((username, key)) = auth {
builder = builder
.header("x-auth-user", username)
.header("x-auth-key", key);
}
let request = if let Some(body) = body {
builder
.header("content-type", "application/json")
.body(Body::from(body.to_string()))
.unwrap()
} else {
builder.body(Body::empty()).unwrap()
};
let response = app.oneshot(request).await.unwrap();
let status = response.status();
let bytes = to_bytes(response.into_body(), usize::MAX).await.unwrap();
let json = serde_json::from_slice(&bytes).unwrap();
(status, json)
}
async fn register(app: axum::Router, username: &str, password: &str) -> (StatusCode, Value) {
hit(
app,
"POST",
"/users/create",
None,
Some(json!({ "username": username, "password": password })),
)
.await
}
async fn update(
app: axum::Router,
username: &str,
key: &str,
document: &str,
percentage: Value,
progress: Value,
device: Value,
) -> (StatusCode, Value) {
hit(
app,
"PUT",
"/syncs/progress",
Some((username, key)),
Some(json!({
"document": document,
"percentage": percentage,
"progress": progress,
"device": device
})),
)
.await
}
#[tokio::test]
async fn register_and_reject_duplicates() {
let (app, _tmp) = test_app(true).await;
let (status, body) = register(app.clone(), "new-user", "passwd123").await;
assert_eq!(status, StatusCode::CREATED);
assert_eq!(body, json!({ "username": "new-user" }));
let (status, body) = register(app, "new-user", "passwd123").await;
assert_eq!(status, StatusCode::PAYMENT_REQUIRED);
assert_eq!(
body,
json!({ "code": 2002, "message": "Username is already registered." })
);
}
#[tokio::test]
async fn registration_can_be_disabled() {
let (app, _tmp) = test_app(false).await;
let (status, body) = register(app, "new-user", "passwd123").await;
assert_eq!(status, StatusCode::PAYMENT_REQUIRED);
assert_eq!(
body,
json!({ "code": 2005, "message": "User registration is disabled." })
);
}
#[tokio::test]
async fn auth_matches_original_behavior() {
let (app, _tmp) = test_app(true).await;
register(app.clone(), "user1", "passwd123").await;
let (status, body) = hit(app.clone(), "GET", "/users/auth", Some(("user1", "")), None).await;
assert_eq!(status, StatusCode::UNAUTHORIZED);
assert_eq!(body, json!({ "code": 2001, "message": "Unauthorized" }));
let (status, body) = hit(
app.clone(),
"GET",
"/users/auth",
Some(("user1", "wrong_password")),
None,
)
.await;
assert_eq!(status, StatusCode::UNAUTHORIZED);
assert_eq!(body, json!({ "code": 2001, "message": "Unauthorized" }));
let (status, body) = hit(
app,
"GET",
"/users/auth",
Some(("user1", "passwd123")),
None,
)
.await;
assert_eq!(status, StatusCode::OK);
assert_eq!(body, json!({ "authorized": "OK" }));
}
#[tokio::test]
async fn progress_round_trip_and_last_write_wins() {
let (app, _tmp) = test_app(true).await;
register(app.clone(), "user1", "passwd123").await;
let (status, body) = update(
app.clone(),
"user1",
"wrong",
"89isjkdaj9j",
json!(0.32),
json!("56"),
json!("my kpw"),
)
.await;
assert_eq!(status, StatusCode::UNAUTHORIZED);
assert_eq!(body, json!({ "code": 2001, "message": "Unauthorized" }));
let (status, body) = update(
app.clone(),
"user1",
"passwd123",
"89isjkdaj9j",
json!(0.32),
json!("56"),
json!("my kpw"),
)
.await;
assert_eq!(status, StatusCode::OK);
assert_eq!(body["document"], "89isjkdaj9j");
assert!(body["timestamp"].as_i64().is_some());
let (status, body) = hit(
app.clone(),
"GET",
"/syncs/progress/89isjkdaj9jnon_existent",
Some(("user1", "passwd123")),
None,
)
.await;
assert_eq!(status, StatusCode::OK);
assert_eq!(body, json!({}));
update(
app.clone(),
"user1",
"passwd123",
"89isjkdaj9j",
json!(0.22),
json!("36"),
json!("my pb"),
)
.await;
let (status, mut body) = hit(
app,
"GET",
"/syncs/progress/89isjkdaj9j",
Some(("user1", "passwd123")),
None,
)
.await;
assert_eq!(status, StatusCode::OK);
assert!(body["timestamp"].as_i64().is_some());
body.as_object_mut().unwrap().remove("timestamp");
assert_eq!(
body,
json!({
"document": "89isjkdaj9j",
"percentage": 0.22,
"progress": "36",
"device": "my pb"
})
);
}
#[tokio::test]
async fn validation_errors_match_compatibility_contract() {
let (app, _tmp) = test_app(true).await;
register(app.clone(), "user1", "passwd123").await;
let (status, body) = register(app.clone(), "bad:user", "passwd123").await;
assert_eq!(status, StatusCode::FORBIDDEN);
assert_eq!(body, json!({ "code": 2003, "message": "Invalid request" }));
let (status, body) = update(
app.clone(),
"user1",
"passwd123",
"bad:doc",
json!(0),
json!(""),
json!(""),
)
.await;
assert_eq!(status, StatusCode::FORBIDDEN);
assert_eq!(
body,
json!({ "code": 2004, "message": "Field 'document' not provided." })
);
let (status, body) = update(
app,
"user1",
"passwd123",
"doc",
json!("not-a-number"),
json!(""),
json!(""),
)
.await;
assert_eq!(status, StatusCode::FORBIDDEN);
assert_eq!(body, json!({ "code": 2003, "message": "Invalid request" }));
}
#[tokio::test]
async fn healthcheck_returns_ok() {
let (app, _tmp) = test_app(true).await;
let (status, body) = hit(app, "GET", "/healthcheck", None, None).await;
assert_eq!(status, StatusCode::OK);
assert_eq!(body, json!({ "state": "OK" }));
}