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/*
This file is part of GNU Taler
(C) 2024 Taler Systems S.A.
GNU Taler is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
import { ObservabilityEvent } from "./index.js";
import { HttpRequestLibrary, HttpRequestOptions, HttpResponse } from "./http-common.js";
import { ObservabilityEventType } from "./notifications.js"
import { getErrorDetailFromException } from "./errors.js";
/**
* Observability sink can be passed into various operations (HTTP requests, DB access)
* to do structured logging within a particular context (task, request, ...).
*/
export interface ObservabilityContext {
observe(evt: ObservabilityEvent): void;
}
export class ObservableHttpClientLibrary implements HttpRequestLibrary {
constructor(
private impl: HttpRequestLibrary,
private oc: ObservabilityContext,
) { }
async fetch(
url: string,
opt?: HttpRequestOptions | undefined,
): Promise<HttpResponse> {
this.oc.observe({
type: ObservabilityEventType.HttpFetchStart,
url: url,
});
try {
const res = await this.impl.fetch(url, opt);
this.oc.observe({
type: ObservabilityEventType.HttpFetchFinishSuccess,
url,
status: res.status,
});
return res;
} catch (e) {
this.oc.observe({
type: ObservabilityEventType.HttpFetchFinishError,
url,
error: getErrorDetailFromException(e),
});
throw e;
}
}
}
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