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use std::fmt::Debug;
use std::future::Future;
use actix_web::rt::time::Instant;
use actix_web::{http, HttpResponse, ResponseError};
use api::rest::models::{ApiResponse, ApiStatus, HardwareUsage};
use collection::operations::types::CollectionError;
use common::counter::hardware_accumulator::HwMeasurementAcc;
use serde::Serialize;
use storage::content_manager::errors::StorageError;
use storage::content_manager::toc::request_hw_counter::RequestHwCounter;
use storage::dispatcher::Dispatcher;
pub fn get_request_hardware_counter(
dispatcher: &Dispatcher,
collection_name: String,
report_to_api: bool,
) -> RequestHwCounter {
RequestHwCounter::new(
HwMeasurementAcc::new_with_drain(&dispatcher.get_collection_hw_metrics(collection_name)),
report_to_api,
false,
)
}
pub fn accepted_response(timing: Instant, hardware_usage: Option<HardwareUsage>) -> HttpResponse {
HttpResponse::Accepted().json(ApiResponse::<()> {
result: None,
status: ApiStatus::Accepted,
time: timing.elapsed().as_secs_f64(),
usage: hardware_usage,
})
}
pub fn process_response<T>(
response: Result<T, StorageError>,
timing: Instant,
hardware_usage: Option<HardwareUsage>,
) -> HttpResponse
where
T: Serialize,
{
match response {
Ok(res) => HttpResponse::Ok().json(ApiResponse {
result: Some(res),
status: ApiStatus::Ok,
time: timing.elapsed().as_secs_f64(),
usage: hardware_usage,
}),
Err(err) => process_response_error(err, timing, hardware_usage),
}
}
pub fn process_response_error(
err: StorageError,
timing: Instant,
hardware_usage: Option<HardwareUsage>,
) -> HttpResponse {
log_service_error(&err);
let error = HttpError::from(err);
HttpResponse::build(error.status_code()).json(ApiResponse::<()> {
result: None,
status: ApiStatus::Error(error.to_string()),
time: timing.elapsed().as_secs_f64(),
usage: hardware_usage,
})
}
/// Response wrapper for a `Future` returning `Result`.
///
/// # Cancel safety
///
/// Future must be cancel safe.
pub async fn time<T, Fut>(future: Fut) -> HttpResponse
where
Fut: Future<Output = Result<T, StorageError>>,
T: serde::Serialize,
{
time_impl(async { future.await.map(Some) }).await
}
/// Response wrapper for a `Future` returning `Result`.
/// If `wait` is false, returns `202 Accepted` immediately.
pub async fn time_or_accept<T, Fut>(future: Fut, wait: bool) -> HttpResponse
where
Fut: Future<Output = Result<T, StorageError>> + Send + 'static,
T: serde::Serialize + Send + 'static,
{
let future = async move {
let handle = tokio::task::spawn(async move {
let result = future.await;
if !wait {
if let Err(err) = &result {
log_service_error(err);
}
}
result
});
if wait {
handle.await?.map(Some)
} else {
Ok(None)
}
};
time_impl(future).await
}
/// # Cancel safety
///
/// Future must be cancel safe.
async fn time_impl<T, Fut>(future: Fut) -> HttpResponse
where
Fut: Future<Output = Result<Option<T>, StorageError>>,
T: serde::Serialize,
{
let instant = Instant::now();
match future.await.transpose() {
Some(res) => process_response(res, instant, None),
None => accepted_response(instant, None),
}
}
fn log_service_error(err: &StorageError) {
if let StorageError::ServiceError { backtrace, .. } = err {
log::error!("Error processing request: {err}");
if let Some(backtrace) = backtrace {
log::trace!("Backtrace: {backtrace}");
}
}
}
pub type HttpResult<T, E = HttpError> = Result<T, E>;
#[derive(Clone, Debug, thiserror::Error)]
#[error("{0}")]
pub struct HttpError(StorageError);
impl ResponseError for HttpError {
fn status_code(&self) -> http::StatusCode {
match &self.0 {
StorageError::BadInput { .. } => http::StatusCode::BAD_REQUEST,
StorageError::NotFound { .. } => http::StatusCode::NOT_FOUND,
StorageError::ServiceError { .. } => http::StatusCode::INTERNAL_SERVER_ERROR,
StorageError::BadRequest { .. } => http::StatusCode::BAD_REQUEST,
StorageError::Locked { .. } => http::StatusCode::FORBIDDEN,
StorageError::Timeout { .. } => http::StatusCode::REQUEST_TIMEOUT,
StorageError::AlreadyExists { .. } => http::StatusCode::CONFLICT,
StorageError::ChecksumMismatch { .. } => http::StatusCode::BAD_REQUEST,
StorageError::Forbidden { .. } => http::StatusCode::FORBIDDEN,
StorageError::PreconditionFailed { .. } => http::StatusCode::INTERNAL_SERVER_ERROR,
StorageError::InferenceError { .. } => http::StatusCode::BAD_REQUEST,
}
}
}
impl From<StorageError> for HttpError {
fn from(err: StorageError) -> Self {
HttpError(err)
}
}
impl From<CollectionError> for HttpError {
fn from(err: CollectionError) -> Self {
HttpError(err.into())
}
}
impl From<std::io::Error> for HttpError {
fn from(err: std::io::Error) -> Self {
HttpError(err.into()) // TODO: Is this good enough?.. 🤔
}
}
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