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music on my phone. One feature I like is the personalized playlist recommendations on the home screen. Behind the scenes, my device likely sends an HTTP GET request to Spotify’s servers asking for recommended tracks based on my listening history. The server processes this request, runs algorithms to select songs I might like, and sends back an HTTP response containing the playlist data in JSON format. My app then parses that response and displays the recommended songs for me to play instantly. question 2. Yes, this lab made me realize that every app or website I use is constantly sending and receiving HTTP requests in the background. Even simple actions, like loading a playlist or checking the weather, involve multiple requests and responses I never notice. It makes me appreciate how much coordination happens behind the scenes to make technology feel instant and seamless.
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Request and response notes
Checkpoint 1
Read the request and response shown on lines 1-32 of the lab. Choose five lines from the request and/or the response. For each, make an inference about the meaning of the line, and some situation in which it might be useful. You are welcome to research the meanings of these headers, but it's also fine to speculate for now.
Answers: line: Connection: keep-alive This line may mean to keep the webpage open until closed.
line: Date: Tue, 05 Mar 2024 00:25:26 GMT The above line may mean the date in which you accessed the derver
line: "question": "Where do you get dragon milk?" This could be the question in text on the webpage
Line: Content-Type: application/json This could mean that the application is made by a user named json???
Server: nginx/1.22.0 (Ubuntu) This may mean what the name of the server you accessed is called.
Checkpoint 2
The goal of this checkpoint is to see what status codes you can get back from
the riddle server. Paste below several http requests and the status codes
they return.
BELOW I EXCLUDED THE ANSWEDR TO GET A 400 CODE mattd@Decker:~/making_with_code/mwc2/unit1/lab_riddles$ http -v post https://riddles.makingwithcode.org/guess id=1 POST /guess HTTP/1.1 Accept: application/json, /;q=0.5 Accept-Encoding: gzip, deflate Connection: keep-alive Content-Length: 11 Content-Type: application/json Host: riddles.makingwithcode.org User-Agent: HTTPie/3.2.2
{ "id": "1" }
HTTP/1.1 400 Bad Request Connection: keep-alive Content-Length: 51 Content-Type: application/json Cross-Origin-Opener-Policy: same-origin Date: Mon, 09 Feb 2026 15:50:39 GMT Referrer-Policy: same-origin Server: nginx/1.24.0 (Ubuntu) X-Content-Type-Options: nosniff X-Frame-Options: DENY
{ "errors": { "answer": [ "This field is required." ] } }
FOR EXAMPLE 2 I REMOVE THE S IN HTTPS
mattd@Decker:~/making_with_code/mwc2/unit1/lab_riddles$ http -v post http://riddles.makingwithcode.org/guess id=1 answer ="a short-legged cow" POST /guess HTTP/1.1 Accept: application/json, /;q=0.5 Accept-Encoding: gzip, deflate Connection: keep-alive Content-Length: 43 Content-Type: application/json Host: riddles.makingwithcode.org User-Agent: HTTPie/3.2.2
{ "answer": "a short-legged cow", "id": "1" }
HTTP/1.1 301 Moved Permanently Connection: keep-alive Content-Length: 178 Content-Type: text/html Date: Mon, 09 Feb 2026 15:52:51 GMT Location: https://riddles.makingwithcode.org/guess Server: nginx/1.24.0 (Ubuntu)
<html> <head></head>301 Moved Permanently
nginx/1.24.0 (Ubuntu) </html>