Instructions on how to utilize Admin/RemoveSanitizers (#8142)

* instructions on how to remove sanitizers
* updating the runtime data model to provide a cleaner appearance
* making the data revealed on info/active more apparent

tools/test-proxy/Azure.Sdk.Tools.TestProxy/Models/ActionDescription.cs

@@ -24,6 +24,7 @@ public class ActionDescription
         public string Name;
         public string Description;
         public CtorDescription ConstructorDetails;
+        public string SanitizerId;
 
         public ActionDescription() { }
 

tools/test-proxy/Azure.Sdk.Tools.TestProxy/Models/ActiveMetadataModel.cs

@@ -1,13 +1,7 @@
-using Microsoft.AspNetCore.Mvc.RazorPages;
-using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Reflection;
-using System.Xml;
-using System.IO;
 using Azure.Sdk.Tools.TestProxy.Common;
 using System.Collections.Concurrent;
-using Microsoft.CodeAnalysis.Operations;
 using Azure.Sdk.Tools.TestProxy.Common.Exceptions;
 
 namespace Azure.Sdk.Tools.TestProxy.Models
@@ -44,14 +38,14 @@ private List<ActionDescription> _populateFromHandler(RecordingHandler handler, s
                 handler.InMemorySessions
             };
 
-            var sanitizers = handler.SanitizerRegistry.GetSanitizers();
+            var sanitizers = handler.SanitizerRegistry.GetRegisteredSanitizers();
             var recordingFound = false;
             if (!string.IsNullOrWhiteSpace(recordingId)){
                 foreach (var sessionDict in searchCollections)
                 { 
                     if (sessionDict.TryGetValue(recordingId, out var session))
                     {
-                        sanitizers = handler.SanitizerRegistry.GetSanitizers(session);
+                        sanitizers = handler.SanitizerRegistry.GetRegisteredSanitizers(session);
                         transforms = transforms.Concat(session.AdditionalTransforms);
 
                         if (session.CustomMatcher != null)
@@ -76,9 +70,10 @@ private List<ActionDescription> _populateFromHandler(RecordingHandler handler, s
             descriptions.AddRange(sanitizers.Select(x => new ActionDescription()
             {
                 ActionType = MetaDataType.Sanitizer,
-                Name = x.GetType().Name,
-                ConstructorDetails = GetInstanceDetails(x),
-                Description = GetClassDocComment(x.GetType(), docXML)
+                Name = x.Sanitizer.GetType().Name,
+                SanitizerId = x.Id,
+                ConstructorDetails = GetInstanceDetails(x.Sanitizer),
+                Description = GetClassDocComment(x.Sanitizer.GetType(), docXML)
             }));
 
             descriptions.AddRange(handler.Transforms.Select(x => new ActionDescription()

tools/test-proxy/Azure.Sdk.Tools.TestProxy/Models/RunTimeMetadataModel.cs

@@ -5,7 +5,6 @@
 using System.Reflection;
 using System.Xml;
 using System.IO;
-using Azure.Sdk.Tools.TestProxy.Common;
 
 namespace Azure.Sdk.Tools.TestProxy.Models
 {
@@ -107,7 +106,7 @@ public CtorDescription GetInstanceDetails(object target)
                         }
                     }
 
-                    arguments.Add(new Tuple<string, string>(field.Name, propValue));
+                    arguments.Add(new Tuple<string, string>(GetFriendlyFieldName(field.Name), propValue));
                 }
             }
 
@@ -118,6 +117,31 @@ public CtorDescription GetInstanceDetails(object target)
             };
         }
 
+        public static Dictionary<string, string> FieldNameMapping = new Dictionary<string, string>()
+        {
+            { "_jsonPath", "jsonPath" },
+            { "_value", "value" },
+            { "_regex", "regex" },
+            { "_groupForReplace", "groupForReplace" },
+            { "_condition", "condition" },
+            { "_target", "target" },
+            { "_key", "key" },
+            { "_method", "method" },
+            { "_newValue", "value" },
+            { "_resetAfterFirst", "resetAfterFirst" },
+            { "_regexValue", "regex" }
+        };
+
+        public string GetFriendlyFieldName(string fieldName)
+        {
+            if (!string.IsNullOrWhiteSpace(fieldName) && FieldNameMapping.ContainsKey(fieldName))
+            {
+                return FieldNameMapping[fieldName];
+            }
+
+            return fieldName;
+        }
+
         public string GetClassDocComment(Type type, XmlDocument docCommentXml)
         {
             var memberSearchString = String.Format(CLASS_FORMAT_STRING, type.FullName);

tools/test-proxy/Azure.Sdk.Tools.TestProxy/README.md

@@ -463,7 +463,10 @@ Of course, feel free to check any of the [examples](https://github.com/Azure/azu
 
 The test-proxy is a record/playback solution. As a result, there a few concepts that devs will likely recognize from other record/playback solutions:
 
-- A `Sanitizer` is used to remove sensitive information prior to storage. When a request comes in during `playback` mode, `sanitizers` are applied to the request prior to matching to a recording.
+- A `Sanitizer` is used to remove sensitive information prior to storage. Sanitizers are applied...
+  - To the request matching against the recording entries during `playback` mode.
+  - To the recording entries loaded from disk when starting a `playback` session.
+  - To the recording entries _before_ they are saved to disk when stopping a `record` session.
 - `Matchers` are used to retrieve a request/response pair from a previous recording. By default, it functions by comparing `URI`, `Headers`, and `Body`. As of now, only a single matcher can be used when retrieving an entry during playback.
 - A `Transform` is used when a user needs to "transform" a matched recording response with some value from the incoming request. This action is specific to `playback` mode. For instance, the test-proxy has two default `transforms`:
   - `x-ms-client-id` is copied from request and applied to response prior to return.
@@ -551,6 +554,78 @@ In some cases, users need to register a lot (10+) of sanitizers. In this case, g
 ]
 ```
 
+#### Knowing what was added
+
+When `AddSanitizer` or `AddSanitizers` is called, check the response `body` for an array containing the ids of sanitizers that have been registered.
+
+Example response body:
+
+```jsonc
+// POSTS to Admin/AddSanitizer has individual result
+{
+  "Sanitizer": "3"
+}
+```
+
+```jsonc
+// POSTS to Admin/AddSanitizers has multiple results
+{
+  "Sanitizers": ["3", "4", "9"]
+}
+```
+
+#### Removing a sanitizer
+
+Following #8120, sanitizers were given identifiers so that they can be removed. 
+
+- The default `session` sanitizers list can be found in code here.
+- Visiting `http://localhost:5000/Info/Active` on your browser when the proxy is running on your machine will present you with an easy summary of these available sanitizers as well.
+
+When a recording or playback session is begun (`Playback/Start` or `Record/Start`), all the **current** session sanitizers are applied to the recording. Session sanitizers added **after** record or playback has begun do not apply to the prior-started session.
+
+To remove a session-level sanitizer, one only must...
+
+```jsonc
+// request method = `POST`
+// request URI = <proxyUrl>/Admin/RemoveSanitizers
+// request headers =
+{
+  "Content-Type": "application/json",
+  "Content-Length": 36
+}
+// request body =
+{
+  Sanitizers: ["AZSDK002", "AZSDK003"]
+}
+```
+
+On successful request, users will receive a list of the removed identifiers.
+
+```jsonc
+// response body
+{
+  Removed: ["ID1"]
+}
+```
+
+To remove a sanitizer from a specific recording...
+
+```jsonc
+// request method = `POST`
+// request URI = <proxyUrl>/Admin/RemoveSanitizers
+// request headers =
+{
+  "Content-Type": "application/json",
+  "Content-Length": 36,
+  "x-recording-id": "your-recording-id-here"
+}
+// request body =
+{
+  Sanitizers: ["AZSDK002", "AZSDK003"]
+}
+```
+
+
 ### Set a Matcher
 
 Setting a matcher is just like adding a `sanitizer`. Set the `x-abstraction-identifier` value to the name of the matcher you want to instantiate, and provide the proper constructor arguments in the body! Check `Info/Available/` for available matchers.

tools/test-proxy/Azure.Sdk.Tools.TestProxy/Views/Info/ActiveExtensions.cshtml

@@ -54,7 +54,7 @@
         <table style="width:100%">
             <tr>
                 <td>
-                    <h2>@extension.Name</h2>
+                    <h2>"@extension.SanitizerId" - @extension.Name</h2>
                 </td>
             </tr>
             <tr>