From bf8dc3f0d7f4c2d6d20506acf58c3831b94529c7 Mon Sep 17 00:00:00 2001 From: DarkSun Date: Tue, 17 Sep 2019 12:23:27 +0800 Subject: [PATCH] =?UTF-8?q?=E9=80=89=E9=A2=98:=2020190827=20curl=20exercis?= =?UTF-8?q?es?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit sources/tech/20190827 curl exercises.md --- sources/tech/20190827 curl exercises.md | 84 +++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 sources/tech/20190827 curl exercises.md diff --git a/sources/tech/20190827 curl exercises.md b/sources/tech/20190827 curl exercises.md new file mode 100644 index 0000000000..36eae2743b --- /dev/null +++ b/sources/tech/20190827 curl exercises.md @@ -0,0 +1,84 @@ +[#]: collector: (lujun9972) +[#]: translator: ( ) +[#]: reviewer: ( ) +[#]: publisher: ( ) +[#]: url: ( ) +[#]: subject: (curl exercises) +[#]: via: (https://jvns.ca/blog/2019/08/27/curl-exercises/) +[#]: author: (Julia Evans https://jvns.ca/) + +curl exercises +====== + +Recently I’ve been interested in how people learn things. I was reading Kathy Sierra’s great book [Badass: Making Users Awesome][1]. It talks about the idea of _deliberate practice_. + +The idea is that you find a small micro-skill that can be learned in maybe 3 sessions of 45 minutes, and focus on learning that micro-skill. So, as an exercise, I was trying to think of a computer skill that I thought could be learned in 3 45-minute sessions. + +I thought that making HTTP requests with `curl` might be a skill like that, so here are some curl exercises as an experiment! + +### what’s curl? + +curl is a command line tool for making HTTP requests. I like it because it’s an easy way to test that servers or APIs are doing what I think, but it’s a little confusing at first! + +Here’s a drawing explaining curl’s most important command line arguments (which is page 6 of my [Bite Size Networking][2] zine). You can click to make it bigger. + + + +### fluency is valuable + +With any command line tool, I think having fluency is really helpful. It’s really nice to be able to just type in the thing you need. For example recently I was testing out the Gumroad API and I was able to just type in: + +``` +curl https://api.gumroad.com/v2/sales \ + -d "access_token=" \ + -X GET -d "before=2016-09-03" +``` + +and get things working from the command line. + +### 21 curl exercises + +These exercises are about understanding how to make different kinds of HTTP requests with curl. They’re a little repetitive on purpose. They exercise basically everything I do with curl. + +To keep it simple, we’re going to make a lot of our requests to the same website: . httpbin is a service that accepts HTTP requests and then tells you what request you made. + + 1. Request + 2. Request . httpbin.org/anything will look at the request you made, parse it, and echo back to you what you requested. curl’s default is to make a GET request. + 3. Make a POST request to + 4. Make a GET request to , but this time add some query parameters (set `value=panda`). + 5. Request google’s robots.txt file ([www.google.com/robots.txt][3]) + 6. Make a GET request to and set the header `User-Agent: elephant`. + 7. Make a DELETE request to + 8. Request and also get the response headers + 9. Make a POST request to with the JSON body `{"value": "panda"}` + 10. Make the same POST request as the previous exercise, but set the Content-Type header to `application/json` (because POST requests need to have a content type that matches their body). Look at the `json` field in the response to see the difference from the previous one. + 11. Make a GET request to and set the header `Accept-Encoding: gzip` (what happens? why?) + 12. Put a bunch of a JSON in a file and then make a POST request to with the JSON in that file as the body + 13. Make a request to and set the header ‘Accept: image/png’. Save the output to a PNG file and open the file in an image viewer. Try the same thing with with different `Accept:` headers. + 14. Make a PUT request to + 15. Request , save it to a file, and open that file in your image editor. + 16. Request . You’ll get an empty response. Get curl to show you the response headers too, and try to figure out why the response was empty. + 17. Make any request to and just set some nonsense headers (like `panda: elephant`) + 18. Request and . Request them again and get curl to show the response headers. + 19. Request and set a username and password (with `-u username:password`) + 20. Download the Twitter homepage () in Spanish by setting the `Accept-Language: es-ES` header. + 21. Make a request to the Stripe API with curl. (see for how, they give you a test API key). Try making exactly the same request to . + + + +-------------------------------------------------------------------------------- + +via: https://jvns.ca/blog/2019/08/27/curl-exercises/ + +作者：[Julia Evans][a] +选题：[lujun9972][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://jvns.ca/ +[b]: https://github.com/lujun9972 +[1]: https://www.amazon.com/Badass-Making-Awesome-Kathy-Sierra/dp/1491919019 +[2]: https://wizardzines.com/zines/bite-size-networking +[3]: http://www.google.com/robots.txt