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|
//! Base HTTP client for makima API.
use reqwest::Client;
use serde::{de::DeserializeOwned, Serialize};
use std::time::Duration;
use thiserror::Error;
/// API client errors.
#[derive(Error, Debug)]
pub enum ApiError {
#[error("HTTP request failed: {0}")]
Request(#[from] reqwest::Error),
#[error("API error (HTTP {status}): {message}")]
Api { status: u16, message: String },
#[error("Failed to parse response: {0}")]
Parse(String),
}
/// Maximum number of retry attempts for failed requests.
const MAX_RETRIES: u32 = 3;
/// Initial backoff delay in milliseconds.
const INITIAL_BACKOFF_MS: u64 = 100;
/// HTTP client for makima API.
pub struct ApiClient {
client: Client,
base_url: String,
api_key: String,
}
impl ApiClient {
/// Create a new API client.
pub fn new(base_url: String, api_key: String) -> Result<Self, ApiError> {
let client = Client::builder()
.build()?;
Ok(Self {
client,
base_url: base_url.trim_end_matches('/').to_string(),
api_key,
})
}
/// Make a GET request with retry.
pub async fn get<T: DeserializeOwned>(&self, path: &str) -> Result<T, ApiError> {
let url = format!("{}{}", self.base_url, path);
let mut last_error = None;
for attempt in 0..MAX_RETRIES {
if attempt > 0 {
tokio::time::sleep(Self::backoff_delay(attempt - 1)).await;
}
let result = self.client
.get(&url)
// Send both headers - server will try tool key first, then API key
.header("X-Makima-Tool-Key", &self.api_key)
.header("X-Makima-API-Key", &self.api_key)
.send()
.await;
match result {
Ok(response) => {
match self.handle_response(response).await {
Ok(value) => return Ok(value),
Err(e) if Self::is_retryable(&e) && attempt < MAX_RETRIES - 1 => {
last_error = Some(e);
continue;
}
Err(e) => return Err(e),
}
}
Err(e) => {
let error = ApiError::Request(e);
if Self::is_retryable(&error) && attempt < MAX_RETRIES - 1 {
last_error = Some(error);
continue;
}
return Err(error);
}
}
}
Err(last_error.unwrap())
}
/// Make a POST request with JSON body and retry.
pub async fn post<T: DeserializeOwned, B: Serialize>(
&self,
path: &str,
body: &B,
) -> Result<T, ApiError> {
let url = format!("{}{}", self.base_url, path);
let mut last_error = None;
for attempt in 0..MAX_RETRIES {
if attempt > 0 {
tokio::time::sleep(Self::backoff_delay(attempt - 1)).await;
}
let result = self.client
.post(&url)
// Send both headers - server will try tool key first, then API key
.header("X-Makima-Tool-Key", &self.api_key)
.header("X-Makima-API-Key", &self.api_key)
.header("Content-Type", "application/json")
.json(body)
.send()
.await;
match result {
Ok(response) => {
match self.handle_response(response).await {
Ok(value) => return Ok(value),
Err(e) if Self::is_retryable(&e) && attempt < MAX_RETRIES - 1 => {
last_error = Some(e);
continue;
}
Err(e) => return Err(e),
}
}
Err(e) => {
let error = ApiError::Request(e);
if Self::is_retryable(&error) && attempt < MAX_RETRIES - 1 {
last_error = Some(error);
continue;
}
return Err(error);
}
}
}
Err(last_error.unwrap())
}
/// Make a POST request without body and retry.
pub async fn post_empty<T: DeserializeOwned>(&self, path: &str) -> Result<T, ApiError> {
let url = format!("{}{}", self.base_url, path);
let mut last_error = None;
for attempt in 0..MAX_RETRIES {
if attempt > 0 {
tokio::time::sleep(Self::backoff_delay(attempt - 1)).await;
}
let result = self.client
.post(&url)
// Send both headers - server will try tool key first, then API key
.header("X-Makima-Tool-Key", &self.api_key)
.header("X-Makima-API-Key", &self.api_key)
.send()
.await;
match result {
Ok(response) => {
match self.handle_response(response).await {
Ok(value) => return Ok(value),
Err(e) if Self::is_retryable(&e) && attempt < MAX_RETRIES - 1 => {
last_error = Some(e);
continue;
}
Err(e) => return Err(e),
}
}
Err(e) => {
let error = ApiError::Request(e);
if Self::is_retryable(&error) && attempt < MAX_RETRIES - 1 {
last_error = Some(error);
continue;
}
return Err(error);
}
}
}
Err(last_error.unwrap())
}
/// Make a PUT request with JSON body and retry.
pub async fn put<T: DeserializeOwned, B: Serialize>(
&self,
path: &str,
body: &B,
) -> Result<T, ApiError> {
let url = format!("{}{}", self.base_url, path);
let mut last_error = None;
for attempt in 0..MAX_RETRIES {
if attempt > 0 {
tokio::time::sleep(Self::backoff_delay(attempt - 1)).await;
}
let result = self.client
.put(&url)
// Send both headers - server will try tool key first, then API key
.header("X-Makima-Tool-Key", &self.api_key)
.header("X-Makima-API-Key", &self.api_key)
.header("Content-Type", "application/json")
.json(body)
.send()
.await;
match result {
Ok(response) => {
match self.handle_response(response).await {
Ok(value) => return Ok(value),
Err(e) if Self::is_retryable(&e) && attempt < MAX_RETRIES - 1 => {
last_error = Some(e);
continue;
}
Err(e) => return Err(e),
}
}
Err(e) => {
let error = ApiError::Request(e);
if Self::is_retryable(&error) && attempt < MAX_RETRIES - 1 {
last_error = Some(error);
continue;
}
return Err(error);
}
}
}
Err(last_error.unwrap())
}
/// Make a DELETE request with retry.
pub async fn delete(&self, path: &str) -> Result<(), ApiError> {
let url = format!("{}{}", self.base_url, path);
let mut last_error = None;
for attempt in 0..MAX_RETRIES {
if attempt > 0 {
tokio::time::sleep(Self::backoff_delay(attempt - 1)).await;
}
let result = self.client
.delete(&url)
.header("X-Makima-Tool-Key", &self.api_key)
.header("X-Makima-API-Key", &self.api_key)
.send()
.await;
match result {
Ok(response) => {
let status = response.status();
if !status.is_success() {
let body = response.text().await.unwrap_or_default();
let error = ApiError::Api {
status: status.as_u16(),
message: body,
};
if Self::is_retryable(&error) && attempt < MAX_RETRIES - 1 {
last_error = Some(error);
continue;
}
return Err(error);
}
return Ok(());
}
Err(e) => {
let error = ApiError::Request(e);
if Self::is_retryable(&error) && attempt < MAX_RETRIES - 1 {
last_error = Some(error);
continue;
}
return Err(error);
}
}
}
Err(last_error.unwrap())
}
/// Make a DELETE request with response and retry.
pub async fn delete_with_response<T: DeserializeOwned>(&self, path: &str) -> Result<T, ApiError> {
let url = format!("{}{}", self.base_url, path);
let mut last_error = None;
for attempt in 0..MAX_RETRIES {
if attempt > 0 {
tokio::time::sleep(Self::backoff_delay(attempt - 1)).await;
}
let result = self.client
.delete(&url)
.header("X-Makima-Tool-Key", &self.api_key)
.header("X-Makima-API-Key", &self.api_key)
.send()
.await;
match result {
Ok(response) => {
match self.handle_response(response).await {
Ok(value) => return Ok(value),
Err(e) if Self::is_retryable(&e) && attempt < MAX_RETRIES - 1 => {
last_error = Some(e);
continue;
}
Err(e) => return Err(e),
}
}
Err(e) => {
let error = ApiError::Request(e);
if Self::is_retryable(&error) && attempt < MAX_RETRIES - 1 {
last_error = Some(error);
continue;
}
return Err(error);
}
}
}
Err(last_error.unwrap())
}
/// Handle API response.
async fn handle_response<T: DeserializeOwned>(
&self,
response: reqwest::Response,
) -> Result<T, ApiError> {
let status = response.status();
let status_code = status.as_u16();
if !status.is_success() {
let body = response.text().await.unwrap_or_default();
return Err(ApiError::Api {
status: status_code,
message: body,
});
}
let body = response.text().await?;
// Handle empty responses
if body.is_empty() || body == "null" {
// Try to parse empty/null as the target type
serde_json::from_str::<T>("null")
.or_else(|_| serde_json::from_str::<T>("{}"))
.map_err(|e| ApiError::Parse(e.to_string()))
} else {
serde_json::from_str::<T>(&body)
.map_err(|e| ApiError::Parse(format!("{}: {}", e, body)))
}
}
/// Check if an error is retryable (connection errors or 5xx server errors).
fn is_retryable(error: &ApiError) -> bool {
match error {
ApiError::Request(e) => {
// Retry on connection errors, timeouts, etc.
e.is_connect() || e.is_timeout() || e.is_request()
}
ApiError::Api { status, .. } => {
// Retry on 5xx server errors
*status >= 500
}
ApiError::Parse(_) => false,
}
}
/// Calculate backoff delay for a given attempt (exponential backoff).
fn backoff_delay(attempt: u32) -> Duration {
Duration::from_millis(INITIAL_BACKOFF_MS * 2u64.pow(attempt))
}
}
|
