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That said, here’s how to redact the password from any urls containing passwords:
Here’s an ITelemetryProcessor implementation that redacts passwords from HTTP and HTTPS urls.
using Microsoft.ApplicationInsights.Channel;
using Microsoft.ApplicationInsights.DataContracts;
using Microsoft.ApplicationInsights.Extensibility;
using System.Text.RegularExpressions;
namespace WebApplication
{
public class RemoveHttpUrlPasswordsTelemetry : ITelemetryProcessor
{
private static readonly Regex removePasswordRegex =
new Regex(@"http(s)?:\/\/.+:(?<password>.+)@", RegexOptions.IgnoreCase | RegexOptions.Compiled);
private readonly ITelemetryProcessor next;
public RemoveHttpUrlPasswordsTelemetry(ITelemetryProcessor next)
{
this.next = next;
}
public void Process(ITelemetry item)
{
var request = item as DependencyTelemetry;
if (request != null && request.Type == "Http")
{
#pragma warning disable CS0618 // Type or member is obsolete
request.CommandName = RemovePasswordFromUrl(request.CommandName);
#pragma warning restore CS0618 // Type or member is obsolete
request.Data = RemovePasswordFromUrl(request.Data);
}
next.Process(item);
}
private static string RemovePasswordFromUrl(string url)
{
var match = removePasswordRegex.Match(url).Groups["password"];
if (match.Success)
{
url = url.Replace(match.Value, "REDACTED");
}
return url;
}
}
}
Next, use the RemoveHttpUrlPasswordsTelemetry class with Application Insights. There’s ASP.NET and ASP.NET Core examples at https://docs.microsoft.com/en-us/azure/azure-monitor/app/api-filtering-sampling#filtering-itelemetryprocessor.
This can help raise your security by not storing passwords in logs!
