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1. User accesses application's URL: http://app.example.com/hosts
2. Browser issues HTTP GET request
to app.exmple.com for /hosts
--- GET /hosts --->
3. Apache runs or hands the request over
to application
4. Application does not find
valid session cookie
5. Application redirects the
browser to logon page
<--- 302 Location /login?back=/hosts ---
6. Browser accesses the logon page /login
--- GET /login?back=/hosts --->
7. Apache runs or hands the request over
to application
8. Application does not see POST
with login & password
9. Application returns logon form
<--- 200 + page with logon form, action set back to /login ---
10. User fills in the login and password and hits "Log in"
11. Browser submits the form
--- POST /login --->
12. Apache runs or hands the request over
to application
13. Application validates the
login & password; if they
are not valid, go to 9 with
message "Bad login or password"
14. Application creates session,
returns session cookies
<--- 302 Location /hosts with Set-Cookie ---
15. Like 2, now with Cookie set
--- GET /hosts --->
16. Apache runs or hands the request over
to application
17. Application sees valid session
cookie, returns the page
<--- 200 + the /hosts page that user wanted to see ---
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