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use super::client::Config;
use async_trait::async_trait;
use base64::Engine;
use worker::*;
use super::{QueryResult, Statement};
/// Database client. This is the main structure used to
/// communicate with the database.
#[derive(Clone, Debug)]
pub struct Client {
base_url: String,
url_for_queries: String,
auth: String,
}
impl Client {
/// Creates a database client with JWT authentication.
///
/// # Arguments
/// * `url` - URL of the database endpoint
/// * `token` - auth token
pub fn new(url: impl Into<String>, token: impl Into<String>) -> Self {
let token = token.into();
let url = url.into();
// Auto-update the URL to start with https:// if no protocol was specified
let base_url = if !url.contains("://") {
"https://".to_owned() + &url
} else {
url
};
let url_for_queries = if cfg!(feature = "separate_url_for_queries") {
format!("{base_url}/queries")
} else {
base_url.clone()
};
Self {
base_url,
url_for_queries,
auth: format!("Bearer {token}"),
}
}
/// Creates a database client with Basic HTTP authentication.
///
/// # Arguments
/// * `url` - URL of the database endpoint
/// * `username` - database username
/// * `pass` - user's password
pub fn from_credentials(
url: impl Into<String>,
username: impl Into<String>,
pass: impl Into<String>,
) -> Self {
let username = username.into();
let pass = pass.into();
let url = url.into();
// Auto-update the URL to start with https:// if no protocol was specified
let base_url = if !url.contains("://") {
"https://".to_owned() + &url
} else {
url
};
let url_for_queries = if cfg!(feature = "separate_url_for_queries") {
format!("{base_url}/queries")
} else {
base_url.clone()
};
Self {
base_url,
url_for_queries,
auth: format!(
"Basic {}",
base64::engine::general_purpose::STANDARD.encode(format!("{username}:{pass}"))
),
}
}
/// Creates a database client from a `Config` object.
pub fn from_config(config: Config) -> Self {
Self::new(config.url, config.auth_token.unwrap_or_default())
}
/// Creates a database client, given a `Url`
///
/// # Arguments
/// * `url` - `Url` object of the database endpoint. This cannot be a relative URL;
///
/// # Examples
///
/// ```
/// # use libsql_client::reqwest::Client;
/// use url::Url;
///
/// let url = Url::parse("https://foo:bar@localhost:8080").unwrap();
/// let db = Client::from_url(&url).unwrap();
/// ```
pub fn from_url<T: TryInto<url::Url>>(url: T) -> anyhow::Result<Client>
where
<T as TryInto<url::Url>>::Error: std::fmt::Display,
{
let url = url
.try_into()
.map_err(|e| anyhow::anyhow!(format!("{e}")))?;
let mut params = url.query_pairs();
// Try a token=XXX parameter first, continue if not found
if let Some((_, token)) = params.find(|(param_key, _)| param_key == "token") {
return Ok(Client::new(url.as_str(), token.into_owned()));
}
let username = url.username();
let password = url.password().unwrap_or_default();
let mut url = url.clone();
url.set_username("")
.map_err(|_| anyhow::anyhow!("Could not extract username from URL. Invalid URL?"))?;
url.set_password(None)
.map_err(|_| anyhow::anyhow!("Could not extract password from URL. Invalid URL?"))?;
Ok(Client::from_credentials(url.as_str(), username, password))
}
/// Establishes a database client from Cloudflare Workers context.
/// Expects the context to contain the following secrets defined:
/// * `LIBSQL_CLIENT_URL`
/// * `LIBSQL_CLIENT_USER`
/// * `LIBSQL_CLIENT_PASS`
/// # Arguments
/// * `ctx` - Cloudflare Workers route context
pub fn from_ctx<D>(ctx: &worker::RouteContext<D>) -> anyhow::Result<Self> {
if let Ok(token) = ctx.secret("LIBSQL_CLIENT_TOKEN") {
return Ok(Self::new(
ctx.secret("LIBSQL_CLIENT_URL")
.map_err(|e| anyhow::anyhow!("{e}"))?
.to_string(),
token.to_string(),
));
}
Ok(Self::from_credentials(
ctx.secret("LIBSQL_CLIENT_URL")
.map_err(|e| anyhow::anyhow!("{e}"))?
.to_string(),
ctx.secret("LIBSQL_CLIENT_USER")
.map_err(|e| anyhow::anyhow!("{e}"))?
.to_string(),
ctx.secret("LIBSQL_CLIENT_PASS")
.map_err(|e| anyhow::anyhow!("{e}"))?
.to_string(),
))
}
/// Executes a batch of SQL statements.
/// Each statement is going to run in its own transaction,
/// unless they're wrapped in BEGIN and END
///
/// # Arguments
/// * `stmts` - SQL statements
///
/// # Examples
///
/// ```
/// # async fn f() {
/// let db = libsql_client::Client::from_credentials("https://example.com", "admin", "s3cr3tp4ss");
/// let result = db
/// .batch(["CREATE TABLE t(id)", "INSERT INTO t VALUES (42)"])
/// .await;
/// # }
/// ```
async fn batch(
&self,
stmts: impl IntoIterator<Item = impl Into<Statement>>,
) -> Result<Vec<QueryResult>> {
let mut headers = Headers::new();
headers.append("Authorization", &self.auth).ok();
let (body, stmts_count) = crate::client::statements_to_string(stmts);
let request_init = RequestInit {
body: Some(wasm_bindgen::JsValue::from_str(&body)),
headers,
cf: CfProperties::new(),
method: Method::Post,
redirect: RequestRedirect::Follow,
};
let req = Request::new_with_init(&self.url_for_queries, &request_init)?;
let response = Fetch::Request(req).send().await;
let mut response = match response {
Ok(r) if r.status_code() == 200 => r,
// Retry with the legacy route: "/"
resp => {
if cfg!(feature = "separate_url_for_queries") {
Fetch::Request(Request::new_with_init(&self.base_url, &request_init)?)
.send()
.await?
} else {
return Err(worker::Error::from(format!("{}", resp?.status_code())));
}
}
};
if response.status_code() != 200 {
return Err(worker::Error::from(format!("{}", response.status_code())));
}
let resp: String = response.text().await?;
let response_json: serde_json::Value = serde_json::from_str(&resp)?;
super::client::json_to_query_result(response_json, stmts_count)
.map_err(|e| worker::Error::from(format!("Error: {} ({:?})", e, request_init.body)))
}
}
#[async_trait(?Send)]
impl super::DatabaseClient for Client {
async fn batch(
&self,
stmts: impl IntoIterator<Item = impl Into<Statement>>,
) -> anyhow::Result<Vec<QueryResult>> {
self.batch(stmts).await.map_err(|e| anyhow::anyhow!("{e}"))
}
}