If-Match implemented in skeleton handler

library/server/ewsgi/specification/request/wgi_meta_names.e

@@ -54,6 +54,18 @@ feature -- Access
 
 	http_if_match: STRING = "HTTP_IF_MATCH"
 	
+	http_if_modified_since: STRING = "HTTP_IF_MODIFIED_SINCE"
+
+	http_if_none_match: STRING = "HTTP_IF_NONE_MATCH"
+
+	http_if_range: STRING = "HTTP_IF_RANGE"
+	
+	http_if_unmodified_since: STRING = "HTTP_IF_UNMODIFIED_SINCE"
+
+	http_last_modified: STRING = "HTTP_LAST_MODIFIED"
+
+	http_range: STRING = "HTTP_RANGE"
+	
 	gateway_interface: STRING = "GATEWAY_INTERFACE"
 
 	auth_type: STRING = "AUTH_TYPE"

library/server/ewsgi/specification/request/wgi_request.e

@@ -605,7 +605,37 @@ feature -- HTTP_*
 		end
 
 	http_if_match: detachable READABLE_STRING_8
-			-- Existance check on resource
+			-- Existence check on resource
+		deferred
+		end
+
+	http_if_modified_since: detachable READABLE_STRING_8
+			-- Modification check on resource
+		deferred
+		end
+
+	http_if_none_match: detachable READABLE_STRING_8
+			-- Existence check on resource
+		deferred
+		end
+
+	http_if_range: detachable READABLE_STRING_8
+			-- Range check on resource
+		deferred
+		end
+
+	http_if_unmodified_since: detachable READABLE_STRING_8
+			-- Modification check on resource
+		deferred
+		end
+
+	http_last_modified: detachable READABLE_STRING_8
+			-- Modification time of resource
+		deferred
+		end
+
+	http_range: detachable READABLE_STRING_8
+			-- Requested byte-range of resource
 		deferred
 		end
 

library/server/ewsgi/src/implementation/wgi_request_from_table.e

@@ -249,11 +249,47 @@ feature -- Access: HTTP_* CGI meta parameters - 1.1
 		end
 
 	http_if_match: detachable READABLE_STRING_8
-			-- Existance check on resource
+			-- Existence check on resource
 		do
 			Result := meta_string_variable ({WGI_META_NAMES}.http_if_match)
 		end
 	
+	http_if_modified_since: detachable READABLE_STRING_8
+			-- Modification check on resource
+		do
+			Result := meta_string_variable ({WGI_META_NAMES}.http_if_modified_since)
+		end
+
+	http_if_none_match: detachable READABLE_STRING_8
+			-- Existence check on resource
+		do
+			Result := meta_string_variable ({WGI_META_NAMES}.http_if_none_match)
+		end
+
+	http_if_range: detachable READABLE_STRING_8
+			-- Range check on resource
+		do
+			Result := meta_string_variable ({WGI_META_NAMES}.http_if_range)
+		end
+
+	http_if_unmodified_since: detachable READABLE_STRING_8
+			-- Modification check on resource
+		do
+			Result := meta_string_variable ({WGI_META_NAMES}.http_if_unmodified_since)
+		end
+
+	http_last_modified: detachable READABLE_STRING_8
+			-- Modification time of resource
+		do
+			Result := meta_string_variable ({WGI_META_NAMES}.http_last_modified)
+		end
+
+	http_range: detachable READABLE_STRING_8
+			-- Requested byte-range of resource
+		do
+			Result := meta_string_variable ({WGI_META_NAMES}.http_range)
+		end
+
 feature -- Access: Extension to CGI meta parameters - 1.1
 
 	request_uri: READABLE_STRING_8

library/server/wsf/src/wsf_request.e

@@ -1048,6 +1048,42 @@ feature -- HTTP_*
 			Result := wgi_request.http_if_match
 		end
 
+	http_if_modified_since: detachable READABLE_STRING_8
+			-- Modification check on resource
+		do
+			Result := wgi_request.http_if_modified_since
+		end
+
+	http_if_none_match: detachable READABLE_STRING_8
+			-- Existence check on resource
+		do
+			Result := wgi_request.http_if_none_match
+		end
+
+	http_if_range: detachable READABLE_STRING_8
+			-- Range check on resource
+		do
+			Result := wgi_request.http_if_range
+		end
+
+	http_if_unmodified_since: detachable READABLE_STRING_8
+			-- Modification check on resource
+		do
+			Result := wgi_request.http_if_unmodified_since
+		end
+
+	http_last_modified: detachable READABLE_STRING_8
+			-- Modification time of resource
+		do
+			Result := wgi_request.http_last_modified
+		end
+
+	http_range: detachable READABLE_STRING_8
+			-- Requested byte-range of resource
+		do
+			Result := wgi_request.http_range
+		end
+
 feature -- Extra CGI environment variables
 
 	request_uri: READABLE_STRING_8