week two homework, Ryan Fields #14
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MadEste
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Jul 13, 2019
| I noticed it is powered by Express. | ||
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| Headers are values that are passed in the response and also returned by the server. It is data that is exchanged between the client and server. | ||
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MadEste
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Jul 13, 2019
| * **Your Answer:** | ||
| - You can add any headers in the request in Postman under the Headers tab. | ||
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| - When we add the console.log component, then on node we see logging of the headers on the node instance. |
MadEste
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Jul 13, 2019
| * **Question:** When does `app.use()` get called? | ||
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| * **Your Answer:** | ||
| Always, it is called every time. It is just a general request for everything to go through. |
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Always called as long as the request has made it to that point in the route chain.
MadEste
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Jul 13, 2019
| * **Question:** What type of thing is `app` and what is its purpose? | ||
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| * **Your Answer:** | ||
| app is the function that contains all of the methods we will use. When you invoke express you get app. |
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out instance of a server, also a function / event emitter
MadEste
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Jul 13, 2019
| * **Question:** What type of thing is `next` and what does it represent in the callback? | ||
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| * **Your Answer:** | ||
| Forward request to the next route that matches. |
MadEste
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Jul 13, 2019
| * **Your Answer:** | ||
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| Route Parameters and not query parameters. | ||
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res.json({ message: Hello, ${req.params.username}! })
MadEste
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Jul 13, 2019
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| * **Your Answer:** | ||
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| Fails to parse in Postman. |
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Fails to parse the body in the server, and subsequently fails to respond to Postman
MadEste
reviewed
Jul 13, 2019
| * **Question:** Try creating a new vegetable. Then, try restarting your server. What happens to the data you posted and why? | ||
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| * **Your Answer:** | ||
| All gone, no persistent storage. |
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