From b8c55a3c5cb48c5dfac5de4fccceb4d97df12a12 Mon Sep 17 00:00:00 2001
From: Kenta Iwasaki <kenta@lithdew.net>
Date: Mon, 11 May 2020 23:33:08 +0900
Subject: [PATCH] handler, readme: allow ContextHandler to load from another
 context as well, and add request lifecycle to readme

---
 README.md  | 46 +++++++++++++++++++++++++++++++++++++++++++++-
 handler.go |  8 ++++++++
 2 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index ae848c2..556342a 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,48 @@
 
 [![MIT License](https://img.shields.io/apm/l/atomic-design-ui.svg?)](LICENSE)
 [![go.dev reference](https://img.shields.io/badge/go.dev-reference-007d9c?logo=go&logoColor=white&style=flat-square)](https://pkg.go.dev/github.com/lithdew/flatend)
-[![Discord Chat](https://img.shields.io/discord/697002823123992617)](https://discord.gg/HZEbkeQ)
\ No newline at end of file
+[![Discord Chat](https://img.shields.io/discord/697002823123992617)](https://discord.gg/HZEbkeQ)
+
+## Request Lifecycle
+
+```asciidoc
++-------+                       
+|Request|                       
++-------+       -               
+|                               
+v                               
++------------------------------+
+|Negotiate codec for           |
+|decoding input/encoding output|
++------------------------------+
+|                               
+v                               
++--------------------+          
+|Grab                |          
+|1) route parameters |          
+|2) query parameters |          
+|3) header parameters|          
++--------------------+          
+|                               
+v                               
++----------------------+        
+|Decode body parameters|        
+|using codec           |        
++----------------------+        
+|                               
+v                               
++-----------------------------+ 
+|Execute handler w/ parameters| 
++-----------------------------+ 
+|                               
+v                               
++---------------------+         
+|Encode handler output|         
+|using codec          |         
++---------------------+         
+|                               
+v                               
++--------+                      
+|Response|                      
++--------+                      
+```
\ No newline at end of file
diff --git a/handler.go b/handler.go
index 2f3825e..bc267be 100644
--- a/handler.go
+++ b/handler.go
@@ -20,6 +20,7 @@ var (
 	_ http.Handler = (*ContentLengthHandler)(nil)
 	_ http.Handler = (*ContentDecodeHandler)(nil)
 
+	_ ContextLoader = (*ContextHandler)(nil)
 	_ ContextLoader = (*ContentTypeHandler)(nil)
 	_ ContextLoader = (*ContentLengthHandler)(nil)
 	_ ContextLoader = (*ContentDecodeHandler)(nil)
@@ -51,6 +52,13 @@ type ContextHandler struct {
 	}
 }
 
+func (h *ContextHandler) LoadContext(other *Context) {
+	h.Codecs = other.Codecs
+	h.DefaultCodec = other.DefaultCodec
+	h.MinContentLength = other.MinContentLength
+	h.MaxContentLength = other.MaxContentLength
+}
+
 func (h *ContextHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	in := acquireValues()
 	out := acquireValues()