No financial details of the deal have been revealed.
Davari started his career with FSV Mainz 05 II and then joined Eintracht Braunschweig.
The 27-year-old Iranian-Polish goalie was invited to Team Melli after pretty good performance in Bundesliga.
Davari was a member of Iran football team in the 2014 FIFA World Cup but was an unused substitute with Alireza Haghighi starting all of the three matches for Iran.