playframework - Can someone explain what Ok means in play framework? -

i found documentation here not understand class does. (i'm new scala coming java background explanation helps). "200 ok" response mean shown here

a server receives http request message, interprets , responds http response message.

that action play does, receives request message , responds response message.

the first line of response message status line. ok, badrequest, notfound , many more. full status codes can seen here.

so, how play follows:

def a() = action { request => // `request` optional   ok("here's content")   // badrequest("you're asking wrong")   // notfound("you're asking don't have")   // etc } 

action provides request our code block, can interpret request, , produce response. ok line specifies response message has status code of ok. rest of response in parameters , more - e.g., additional response headers using withheaders. play mvc api follows pattern. example, ok.sendfile(new file("myfile.txt")) sends ok status code file content.