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CONCEPT LESSON — HTTP ANATOMY

HTTP Request Anatomy

Raw Request

GET /products?id=104 HTTP/1.1 Host: shop.hackra.local User-Agent: Mozilla/5.0 Cookie: session=abc123 Accept: text/html

Method GET

Path /products?id=104

Headers Host, User-Agent, Cookie, Accept

Raw Response

HTTP/1.1 200 OK Content-Type: text/html Set-Cookie: session=abc123 Content-Length: 4520

Status 200 OK

Headers Content-Type, Set-Cookie

Body HTML content (4520 bytes)

Key Takeaway

The query parameter id=104 is provided by the browser and can be changed by the user. Anything received from the browser must be treated as user-controlled, including hidden form values, cookies and headers. The server must validate it.

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