87 lines
2.3 KiB
TypeScript
87 lines
2.3 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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import {matchesAnyPathPattern} from '@fluxer/hono/src/middleware/utils/PathMatchers';
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import type {TracingOptions} from '@fluxer/hono_types/src/TracingTypes';
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import type {MiddlewareHandler} from 'hono';
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export function tracing(options: TracingOptions = {}): MiddlewareHandler {
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const {
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enabled = true,
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skipPaths = ['/_health', '/metrics'],
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serviceName = 'hono-service',
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withSpan,
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setSpanAttributes,
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attachTraceparent = false,
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} = options;
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return async (c, next) => {
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if (!enabled) {
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await next();
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return;
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}
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const path = c.req.path;
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if (matchesAnyPathPattern(path, skipPaths)) {
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await next();
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return;
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}
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if (!withSpan || !setSpanAttributes) {
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await next();
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return;
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}
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const method = c.req.method;
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const spanName = `http.request ${method} ${path}`;
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await withSpan(spanName, async () => {
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const startTime = Date.now();
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setSpanAttributes({
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'http.method': method,
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'http.url': c.req.url,
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'http.target': path,
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'http.scheme': c.req.header('x-forwarded-proto') ?? 'http',
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'http.host': c.req.header('host') ?? 'unknown',
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'http.user_agent': c.req.header('user-agent') ?? 'unknown',
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'service.name': serviceName,
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});
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await next();
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const durationMs = Date.now() - startTime;
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const status = c.res.status;
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setSpanAttributes({
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'http.status_code': status,
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'http.response_content_length': Number(c.res.headers.get('content-length') ?? 0),
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'http.duration_ms': durationMs,
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});
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if (attachTraceparent) {
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const traceparent = c.res.headers.get('traceparent');
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if (traceparent) {
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c.header('traceparent', traceparent);
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}
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}
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});
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};
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}
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