Support POST based search operations

[anchita-g]

http://hl7.org/fhir/http.html#search
Add support for POST based search in the existing Access Checkers:

1. PatientAccessChecker
2. ListAccessChecker

[bashir2]

Marking this as P2 as it would be nice to have this for the Beta launch.

[vivekmittal07]

Search by POST allows requests of this type (Reference)-

POST [base]/[resource-type]/_search
Content-Type: application/x-www-form-urlencoded
param1=value&...{&_format=[mime-type]}

HAPI doesn't support search by POST. I get 404 error when trying the following curl to HAPI server

curl --location --request POST 'localhost:8080/Patient/_search' \
--header 'Content-Type: application/x-www-form-urlencoded' \
--data-urlencode '_id=3810'

Do we still need to support this feature for Beta ?

[bashir2]

@vivekmittal07 it works for me with a HAPI JPA server. I am guessing that the error is in the URL you are using as it does not have /fhir/ in the path. Here is a sample query that works for me (note the URL path /fhir/Patient/_search):

curl -X POST -H 'Content-Type: application/x-www-form-urlencoded'  \
  --data-urlencode '_id=25949' \
  'http://localhost:8091/fhir/Patient/_search'

[vivekmittal07]

Thanks @bashir2 for verifying this. I made a stupid mistake!

The FHIR path in server was configured as PROXY_TO=<IP>/fhir. So this was adding a /fhir to the outgoing request.
I used the same collection to test Hapi directly and made an error there.