KevinDockx#130 Swappable input implementations for eTag generation

README.md

@@ -215,6 +215,25 @@ public interface IETagGenerator
         string responseBodyContent);
 }
 ````
+## IETagInjector
+
+You can inject an IETagInjector-implementing class to modify how, where and when ETags are provided. The default implementation (DefaultETagInjector) injects the DefaultETag generator using the response body on the http context as the string along with the provided request key.
+
+````csharp
+/// <summary>
+///     Contract for a ETagInjector, which can be used to inject custom eTags for resources
+///     of which may be injected in the request pipeline (eg: based on existing calculated eTag on resource and store key)
+/// </summary>
+/// <remarks>
+///     This injector will wrap the <see cref="IETagGenerator" /> to allow for eTag source to be swapped out
+///     based on the <see cref="HttpContext" /> (rather than extend the interface of <see cref="IETagInjector" /> to
+///     to extended including the <see cref="HttpContext" />
+/// </remarks>
+public interface IETagInjector
+{
+    Task<ETag> RetrieveETag(ETagContext eTagContext);
+}
+````
 
 ## ILastModifiedInjector
 

src/Marvin.Cache.Headers/Interfaces/IETagInjector.cs

@@ -4,8 +4,8 @@
 namespace Marvin.Cache.Headers.Interfaces;
 
 /// <summary>
-///     Contract for a LastModifiedInjector, which can be used to inject custom eTags for resources
-///     of which may be injected in the request pipeline (eg: based on existing calculated eTag on resource and stored)
+///     Contract for a ETagInjector, which can be used to inject custom eTags for resources
+///     of which may be injected in the request pipeline (eg: based on existing calculated eTag on resource and store key)
 /// </summary>
 /// <remarks>
 ///     This injector will wrap the <see cref="IETagGenerator" /> to allow for eTag source to be swapped out