The Journey of a Request to the Backend
From the frontend through the kernel to the backend process
When we send a request to a backend most of us focus on the processing aspect of the request which is really just the last step.
There is so much more happening before a request is ready to be processed, most of this step happens in the Kernel. I break this into 6 steps, each step can theoretically be executed by a dedicated thread or process. Pretty much all backends, web servers, proxies, frameworks and even databases have to do all these steps and they all do choose to do it differently.
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3:50 What is a Request?
10:14 Step 1 - Accept
21:30 Step 2 - Read
29:30 Step 3 - Decrypt
34:00 Step 4 - Parse
40:36 Step 5 - Decode
43:14 Step 6 - Process