Cookie in HTTP
Cookies are small text that a server can store in a user's browser. A server can set multiple cookies with different names.
With the help of cookies, the server can identify the user and store data for each client between their requests.
Cookies are passed between the client and the server using HTTP headers (remember, this is important). Every time the browser requests the server, the browser will send all the cookies for that site to the server.
Using the Cookie header, the client sends a cookie to the server on every request:
Cookie: name=john
If more than one cookie was set, the client will send them all in one header, separated by a semicolon:
Cookie: name=john;surn:smit
Using the Set-Cookie header, the server can set a cookie with the desired name and value:
Set-Cookie: name=john
Is it true that cookies are passed via HTTP headers?
Where are cookies stored, on the server or in the browser?
What header does the server set the cookie with?
What header does the browser use to send cookies to the server?
How often does the browser send cookies to the server?
Open a website and examine the request and response headers. Look for headers that pass cookies.
In the browser debugger, on the "Network" tab, find your request. Click on it. In the request details that appear, find the "Cookies" tab. Study it.
In the browser debugger, on the "Application" tab, find the "Cookies" tab. Examine the cookies recorded in your browser for this site. Try changing and deleting individual cookies (be careful, you can break authorization; make sure you have the password for this site).
