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TJ Holowaychuk 2013-09-02 19:17:49 -07:00
parent 33221d6574
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@ -39,19 +39,19 @@ app.use(function(next){
![koa middleware](https://i.cloudup.com/N7L5UakJo0.gif)
1. Create a date to track duration
2. Yield control to the next middleware
3. Create another date to track response time
4. Yield control to the next middleware
5. Yield immediately since `contentLength` only works with responses
6. Yield upstream to Koa's noop middleware
7. Ignore setting the body unless the path is "/"
8. Set the response to "Hello World"
9. Ignore setting Content-Length when no body is present
10. Set the field
11. Output log line
12. Set `X-Response-Time` header field before response
13. Hand off to Koa to handle the response
1. Create a date to track duration
2. Yield control to the next middleware
3. Create another date to track response time
4. Yield control to the next middleware
5. Yield immediately since `contentLength` only works with responses
6. Yield upstream to Koa's noop middleware
7. Ignore setting the body unless the path is "/"
8. Set the response to "Hello World"
9. Ignore setting Content-Length when no body is present
10. Set the field
11. Output log line
12. Set `X-Response-Time` header field before response
13. Hand off to Koa to handle the response
Note that the final middleware (step __6__) yields to what looks to be nothing - it's actually
yielding to a no-op generator within Koa. This is so that every middleware can conform with the