fix: Allow keyBuilder to depend on request body (#185)

Co-authored-by: MaximeRougieux <[email protected]>

Author: MaximeRougieux

dio_cache_interceptor/lib/src/dio_cache_interceptor_cache_utils.dart

@@ -124,6 +124,7 @@ extension _DioCacheInterceptorUtils on DioCacheInterceptor {
     return options.keyBuilder(
       url: request.uri,
       headers: request.getFlattenHeaders(),
+      body: request.data,
     );
   }
 }

http_cache_client/lib/src/client/http_cache_client_cache_utils.dart

@@ -16,9 +16,12 @@ extension _CacheClientUtils on CacheClient {
   }
 
   String _getCacheKey(HttpBaseRequest request) {
+    final innerRequest = request.inner;
+
     return request.options.keyBuilder(
-      url: request.inner.url,
-      headers: request.inner.headers,
+      url: innerRequest.url,
+      headers: innerRequest.headers,
+      body: innerRequest is http.Request ? innerRequest.body : null,
     );
   }
 
@@ -90,10 +93,7 @@ extension _CacheClientUtils on CacheClient {
       cacheOptions: request.options,
     ).compute(
       cacheResponseBuilder: () => response.toCacheResponse(
-        key: request.options.keyBuilder(
-          url: request.inner.url,
-          headers: request.inner.headers,
-        ),
+        key: _getCacheKey(request),
         options: request.options,
         requestDate: request.requestDate,
       ),

http_cache_core/lib/src/model/cache/cache_options.dart

@@ -9,6 +9,7 @@ import 'cache_priority.dart';
 typedef CacheKeyBuilder = String Function({
   required Uri url,
   Map<String, String>? headers,
+  Object? body,
 });
 
 /// Options to apply to handle request and cache behaviour.
@@ -73,6 +74,7 @@ class CacheOptions {
   static String defaultCacheKeyBuilder({
     required Uri url,
     Map<String, String>? headers,
+    Object? body,
   }) {
     return _uuid.v5(Namespace.url.value, url.toString());
   }