[Question] How to capture 403 response from generated APIClient (java/webclient)

[rocb]

I generated a client using generatorName java and library webclient. The generate api client works the service side REST api returns success. But when I get a HTTP 403 response, the block() call just hangs.

Code is like this:

ReportsApi reportApi = new ReportsApi();
Mono rsp = reportApi.reportsGetDatasourcesInGroup(UUID.fromString(workspaceId), UUID.fromString(reportId));
Datasources ds= rsp.block();

I attempt to add .onErrorMap() and other on the Mono object, with no luck.

I know why I am getting 403 from the server, but I just need to be able to capture it in code so I can do the appropriate.

[borsch]

@rocb usually there are additional methods with WithHttpInfo suffix.
In your very case there should be method with following signature

public Mono<ResponseEntity<Datasources>> reportsGetDatasourcesInGroupWithHttpInfo(UUID workspaceId, UUID reportId) {
..
}

I believe you can use this method to extract status code from that ResponseEntity<Datasources>

[rocb]

@borsch Wow.... you are correct, I did not notice that method. After giving it a try, it behaves the same. It will simply hang on 403, any other response (like 404) can get an exception.

try {
  ReportsApi reportApi = new ReportsApi();
  reportApi.getApiClient().setAccessToken( badAccessToken );  // to simulate 403
  Mono<ResponseEntity<Report>>  rsp = reportApi.reportsGetReportInGroupWithHttpInfo(UUID.fromString(workspaceId),	UUID.fromString(reportId));		
  Report dt = rsp.onErrorMap(WebClientException.class, e -> new Exception("Error on call " + e.getMessage())).block().getBody();
} catch (Exception e) {
  e.printStackTrace();
}

I am able to catch a 404. But a 403 just hangs on .block()

13:33:23.567 [reactor-http-nio-2] DEBUG reactor.netty.resources.DefaultPooledConnectionProvider - [5051d905-1, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443] onStateChange(GET{uri=/v1.0/myorg/groups/7fc18365-6951-406e-aaf2-dc1e93fe8a07/reports/b36d5746-3166-4e1d-8758-c3d57ed5004a, connection=PooledConnection{channel=[id: 0x5051d905, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443]}}, [request_prepared])
13:33:23.578 [reactor-http-nio-2] DEBUG reactor.netty.resources.DefaultPooledConnectionProvider - [5051d905-1, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443] onStateChange(GET{uri=/v1.0/myorg/groups/7fc18365-6951-406e-aaf2-dc1e93fe8a07/reports/b36d5746-3166-4e1d-8758-c3d57ed5004a, connection=PooledConnection{channel=[id: 0x5051d905, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443]}}, [request_sent])
13:33:23.612 [reactor-http-nio-2] DEBUG io.netty.handler.codec.compression.Brotli - brotli4j not in the classpath; Brotli support will be unavailable.
13:33:23.613 [reactor-http-nio-2] DEBUG reactor.netty.http.client.HttpClientOperations - [5051d905-1, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443] Received response (auto-read:false) : [Strict-Transport-Security=max-age=31536000; includeSubDomains, X-Frame-Options=deny, X-Content-Type-Options=nosniff, Access-Control-Expose-Headers=RequestId, RequestId=03b85579-df34-4048-8c90-671663f1b53e, Date=Sun, 10 Jul 2022 18:33:23 GMT, content-length=0]
13:33:23.613 [reactor-http-nio-2] DEBUG reactor.netty.resources.DefaultPooledConnectionProvider - [5051d905-1, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443] onStateChange(GET{uri=/v1.0/myorg/groups/7fc18365-6951-406e-aaf2-dc1e93fe8a07/reports/b36d5746-3166-4e1d-8758-c3d57ed5004a, connection=PooledConnection{channel=[id: 0x5051d905, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443]}}, [response_received])
13:33:23.615 [reactor-http-nio-2] DEBUG org.springframework.web.reactive.function.client.ExchangeFunctions - [75d2da2d] [5051d905-1, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443] Response 403 FORBIDDEN
13:33:23.622 [reactor-http-nio-2] DEBUG reactor.netty.http.client.HttpClientOperations - [5051d905-1, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443] Received last HTTP packet
13:33:23.622 [reactor-http-nio-2] DEBUG reactor.netty.resources.DefaultPooledConnectionProvider - [5051d905, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443] onStateChange(GET{uri=/v1.0/myorg/groups/7fc18365-6951-406e-aaf2-dc1e93fe8a07/reports/b36d5746-3166-4e1d-8758-c3d57ed5004a, connection=PooledConnection{channel=[id: 0x5051d905, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443]}}, [response_completed])
13:33:23.622 [reactor-http-nio-2] DEBUG reactor.netty.resources.DefaultPooledConnectionProvider - [5051d905, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443] onStateChange(GET{uri=/v1.0/myorg/groups/7fc18365-6951-406e-aaf2-dc1e93fe8a07/reports/b36d5746-3166-4e1d-8758-c3d57ed5004a, connection=PooledConnection{channel=[id: 0x5051d905, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443]}}, [disconnecting])
13:33:23.622 [reactor-http-nio-2] DEBUG reactor.netty.resources.DefaultPooledConnectionProvider - [5051d905, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443] Releasing channel
13:33:23.624 [reactor-http-nio-2] DEBUG reactor.netty.resources.PooledConnectionProvider - [5051d905, L:/192.168.1.4:65103 - R:api.powerbi.com/13.73.248.69:443] Channel cleaned, now: 0 active connections, 1 inactive connections and 0 pending acquire requests.

So, for now, I am gonna put in a Duration timeout in.. .block(5) and assume it is a 403 (not really a solution)

[borsch]

Hi @rocb
I've extended webclient api to allow manually control/configure ResponseSpec. Check this PR - #12843 and this Spring example - spring-projects/spring-framework#20280

Hope this will help you

[borsch]

@rocb try latest master