Junior
Why is it not recommended to perform authorization using the GET method, and why is it preferable to use the POST method?
sobes.tech AI
Answer from AI
The GET method is designed for requesting data, not for transmitting confidential information such as credentials. When using GET, data is sent in the URL query string, making it visible in browser history, server logs, and susceptible to interception by intermediaries (like proxies).
In contrast, POST sends data in the request body, which is less exposed and not stored in logs or history.
| Aspect | GET | POST |
|---|---|---|
| Data transmission | In URL string | In request body |
| Data visibility | High (logs, history, bookmarks) | Low (hidden in request body) |
| Security | Low (for sensitive data) | High (for sensitive data) |
| Caching | Possible (by default) | Usually not (by default) |
| Idempotency | Yes (can repeat without side effects) | No (repeating may cause side effects) |
Example of unsafe GET usage for login:
GET /login?username=myuser&password=mypassword HTTP/1.1
Host: example.com
Safe POST example:
POST /login HTTP/1.1
Host: example.com
Content-Type: application/x-www-form-urlencoded
username=myuser&password=mypassword
POST also allows sending larger data volumes, unlike GET which has URL length limits. Idempotency of GET (request can be repeated safely) is undesirable for login operations that should only be performed once.