Devansh Gupta created THRIFT-4221:
-------------------------------------
Summary: Add Rails like Before Action to Thrift
Key: THRIFT-4221
URL: https://issues.apache.org/jira/browse/THRIFT-4221
Project: Thrift
Issue Type: New Feature
Components: Wish List
Affects Versions: 1.0
Reporter: Devansh Gupta
Fix For: 1.0
One issue that comes up often is when we have a service defined with some
functions and we want to do Authentication & Authorization we need to manually
call a function from inside the service implementation every time.
See:
https://stackoverflow.com/questions/4621715/how-to-handle-authentication-and-authorization-with-thrift
A decently popular question.
This ticket proposes to add a _before_action_ (naming flexible) hook which will
be called before the Service call method is executed. It can _only_ raise the
same errors as defined by the function.
Example diff for Golang generated code for simple service:
{code}
exception NotAuthorisedException {
1: string errorMessage,
}
exception ApiException {
1: string errorMessage,
}
service MyService {
string myMethod(1: string authString, 2: string otherArgs ) throws ( 1:
NotAuthorisedException e1, 2: ApiException e ),
}
{code}
{code}
+ // Called before any other action is called
+ BeforeAction(serviceName string, actionName string, args
map[string]interface{}) (err error)
+ // Called if an action returned an error
+ ProcessError(err error) error
}
type MyServiceClient struct {
@@ -391,7 +395,12 @@ func (p *myServiceProcessorMyMethod) Process(seqId int32,
iprot, oprot thrift.TP
result := MyServiceMyMethodResult{}
var retval string
var err2 error
- if retval, err2 = p.handler.MyMethod(args.AuthString, args.OtherArgs_);
err2 != nil {
+ err2 = p.handler.BeforeAction("MyService", "MyMethod",
map[string]interface{}{"AuthString": args.AuthString, "OtherArgs_":
args.OtherArgs_})
+ if err2 == nil {
+ retval, err2 = p.handler.MyMethod(args.AuthString,
args.OtherArgs_)
+ }
+ if err2 != nil {
+ err2 = p.handler.ProcessError(err2)
{code}
It simply calls BeforeAction, if it raises an error it does NOT procede with
making the normal call.
Diffs Attached.
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