From d5c798e6b8f33b43409320eb9c8b5b91a4786a3a Mon Sep 17 00:00:00 2001
From: Tom Christie <tom@tomchristie.com>
Date: Fri, 25 Jan 2019 14:40:33 +0000
Subject: [PATCH] Example ASGI apps now ensure scope['type'] is expected
 message type. (#348)

---
 docs/index.md      | 1 +
 docs/requests.md   | 2 ++
 docs/responses.md  | 9 +++++++++
 docs/testclient.md | 2 ++
 docs/websockets.md | 1 +
 5 files changed, 15 insertions(+)

diff --git a/docs/index.md b/docs/index.md
index 7b5a344a..d6f814f5 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -100,6 +100,7 @@ from starlette.responses import PlainTextResponse
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
diff --git a/docs/requests.md b/docs/requests.md
index 93724668..c71932e8 100644
--- a/docs/requests.md
+++ b/docs/requests.md
@@ -13,6 +13,7 @@ from starlette.response import Response
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
@@ -95,6 +96,7 @@ from starlette.responses import Response
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
diff --git a/docs/responses.md b/docs/responses.md
index be23a3dc..60f89b72 100644
--- a/docs/responses.md
+++ b/docs/responses.md
@@ -24,6 +24,7 @@ from starlette.responses import Response
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
@@ -62,6 +63,7 @@ from starlette.responses import HTMLResponse
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
@@ -79,6 +81,7 @@ from starlette.responses import PlainTextResponse
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
@@ -107,6 +110,7 @@ env = Environment(loader=FileSystemLoader('templates'))
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
@@ -141,6 +145,7 @@ from starlette.responses import JSONResponse
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
@@ -164,6 +169,7 @@ from starlette.responses import UJSONResponse
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
@@ -181,6 +187,7 @@ from starlette.responses import PlainTextResponse, RedirectResponse
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
@@ -210,6 +217,7 @@ async def slow_numbers(minimum, maximum):
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
@@ -237,6 +245,7 @@ from starlette.responses import FileResponse
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
diff --git a/docs/testclient.md b/docs/testclient.md
index d8749a39..bc3e8d59 100644
--- a/docs/testclient.md
+++ b/docs/testclient.md
@@ -9,6 +9,7 @@ from starlette.testclient import TestClient
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'http'
         self.scope = scope
 
     async def __call__(self, receive, send):
@@ -49,6 +50,7 @@ from starlette.websockets import WebSocket
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'websocket'
         self.scope = scope
 
     async def __call__(self, receive, send):
diff --git a/docs/websockets.md b/docs/websockets.md
index 07f3efb6..7a8150c6 100644
--- a/docs/websockets.md
+++ b/docs/websockets.md
@@ -12,6 +12,7 @@ from starlette.websockets import WebSocket
 
 class App:
     def __init__(self, scope):
+        assert scope['type'] == 'websocket'
         self.scope = scope
 
     async def __call__(self, receive, send):