http - CORS Java server side implementation -


i need implement cors support in jersey based rest server. i've gone through of available material , informative tutorials . found 2 approaches people using:

approach-1 :

simple , direct approach implement 1 http filter adds cors header response (jersey specific)

public class responsecorsfilter implements containerresponsefilter {  public containerresponse filter(containerrequest req, containerresponse contresp) {          responsebuilder resp = response.fromresponse(contresp.getresponse());         resp.header("access-control-allow-origin", "*")                 .header("access-control-allow-methods", "get, post, options");          string reqhead = req.getheadervalue("access-control-request-headers");          if(null != reqhead && !reqhead.equals(null)){             resp.header("access-control-allow-headers", reqhead);         }          contresp.setresponse(resp.build());             return contresp;     } }

approach-2 :

fully implement cors per specification i.e. preflight request handling , header support. inspected source code of 1 such open-source java implementation cors-filter

my question approach should taken when? downside of approach-1 vs approach-2?

my use case origins/methods can allowed , authorization http header part of rest requests. inclined towards approach-1 seems of default cors settings suffice use case not sure if not having full cors specs implemented @ server side create issues whatsoever.

for purposes, approach #1 sounds sufficient. approach #2 more case have different responses based on request type, or want validate request information. if response same across request types, #1 should fine. note because implementation allowing requests succeed, should doing own checks make sure request valid. since allowing authorization header, i'm assuming aware of this, , validating authorization token?


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