59 lines
1.9 KiB
C#
59 lines
1.9 KiB
C#
// <copyright file="SuppressInstrumentationHttpModule.cs" company="OpenTelemetry Authors">
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// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// </copyright>
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using System;
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using System.Web;
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using OpenTelemetry;
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namespace Examples.AspNet
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{
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/// <summary>
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/// A demo <see cref="IHttpModule"/> which will suppress ASP.NET
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/// instrumentation if a request contains "suppress=true" on the query
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/// string. Suppressed spans will not be processed/exported by the
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/// OpenTelemetry SDK.
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/// </summary>
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public class SuppressInstrumentationHttpModule : IHttpModule
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{
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private IDisposable suppressionScope;
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public void Init(HttpApplication context)
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{
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context.BeginRequest += this.Application_BeginRequest;
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context.EndRequest += this.Application_EndRequest;
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}
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public void Dispose()
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{
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}
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private void Application_BeginRequest(object sender, EventArgs e)
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{
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var context = ((HttpApplication)sender).Context;
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if (context.Request.QueryString["suppress"] == "true")
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{
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this.suppressionScope = SuppressInstrumentationScope.Begin();
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}
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}
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private void Application_EndRequest(object sender, EventArgs e)
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{
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this.suppressionScope?.Dispose();
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}
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}
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}
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