witchcraft_server/service/
error_log.rs

1use std::sync::Arc;
2
3// Copyright 2022 Palantir Technologies, Inc.
4//
5// Licensed under the Apache License, Version 2.0 (the "License");
6// you may not use this file except in compliance with the License.
7// You may obtain a copy of the License at
8//
9// http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing, software
12// distributed under the License is distributed on an "AS IS" BASIS,
13// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14// See the License for the specific language governing permissions and
15// limitations under the License.
16use crate::service::{Layer, Service};
17use conjure_error::Error;
18use http::{Response, StatusCode};
19use witchcraft_log::{log, Level};
20
21/// A layer which logs errors attached to responses.
22pub struct ErrorLogLayer;
23
24impl<S> Layer<S> for ErrorLogLayer {
25    type Service = ErrorLogService<S>;
26
27    fn layer(self, inner: S) -> Self::Service {
28        ErrorLogService { inner }
29    }
30}
31
32pub struct ErrorLogService<S> {
33    inner: S,
34}
35
36impl<S, R, B> Service<R> for ErrorLogService<S>
37where
38    S: Service<R, Response = Response<B>> + Sync,
39    R: Send,
40{
41    type Response = S::Response;
42
43    async fn call(&self, req: R) -> Self::Response {
44        let response = self.inner.call(req).await;
45
46        if let Some(error) = response.extensions().get::<Arc<Error>>() {
47            let level = match response.status() {
48                StatusCode::INTERNAL_SERVER_ERROR => Level::Error,
49                _ => Level::Info,
50            };
51
52            log!(level, "handler returned non-success", error: error);
53        }
54
55        response
56    }
57}
witchcraft_server/service/error_log.rs

witchcraft_server/service/
error_log.rs
