Json parsing error about scala-server-lambda HOT 6 CLOSED

The Lambda function will accept a ProxyRequest which is the format that API Gateway will send requests with proxy integration enabled. If requests aren't sent through API Gateway, they would need to manually be formatted to include httpMethod, headers, etc which is likely the error you are experiencing.

This is a pretty common issue so I think I'll update the error message to explain this.

from scala-server-lambda.

Thanks. Using sam local it does create a APIGatewayProxyRequestEvent which has the httpMethod and headers. I do not know if I am missing out something, I have not tried servless for local testing so do not know if it is different.

from scala-server-lambda.

Ok, I don't think SAM Local is the issue then.

Looking at the error again, it is coming from Jackson, which lambda uses internally to process json inputs. So it is trying to marshall it into a ProxyRequest. What should be happening is it turns it into an InputStream then this library uses Circe to turn it into a ProxyRequest. I think this is happening due to setting the wrong handler in Lambda. It should be this function not this function, so it should look something like <PACKAGE_NAME>.Route$EntryPoint::handle. What handler are you using?

from scala-server-lambda.

Thanks a lot for you help. It did work with function, I was using handleRequest. But now I am running into a fs2 library issue,it has nothing to do with this library but if you do not mind can you tell me what version of fs2 library you are using. For me it is downloading fs2-core_2.12_1.0.0.jar

java.lang.NoSuchMethodError: fs2.Stream$InvariantOps$.through$extension(Lfs2/internal/FreeC;Lscala/Function1;)Lfs2/internal/FreeC;
at io.github.howardjohn.lambda.http4s.Http4sLambdaHandler$.encodeBody(Http4sLambdaHandler.scala:63)
at io.github.howardjohn.lambda.http4s.Http4sLambdaHandler$.$anonfun$parseRequest$5(Http4sLambdaHandler.scala:53)
at io.github.howardjohn.lambda.http4s.Http4sLambdaHandler$.$anonfun$parseRequest$5$adapted(Http4sLambdaHandler.scala:53)
at scala.Option.map(Option.scala:146)
at io.github.howardjohn.lambda.http4s.Http4sLambdaHandler$.$anonfun$parseRequest$2(Http4sLambdaHandler.scala:53)
at scala.util.Either.map(Either.scala:350)
at io.github.howardjohn.lambda.http4s.Http4sLambdaHandler$.$anonfun$parseRequest$1(Http4sLambdaHandler.scala:47)
at scala.util.Either.flatMap(Either.scala:338)
at io.github.howardjohn.lambda.http4s.Http4sLambdaHandler$.io$github$howardjohn$lambda$http4s$Http4sLambdaHandler$$parseRequest(Http4sLambdaHandler.scala:46)
at io.github.howardjohn.lambda.http4s.Http4sLambdaHandler.handleRequest(Http4sLambdaHandler.scala:15)
at com.test.EntryPoint.handleRequest(Test.scala:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)

from scala-server-lambda.

fs2 is pulled in from http4s. The fs2 version they use can be found at https://http4s.org/versions/.

If you use 0.3.1 of this library it uses http4s 18, which uses an older fs2. 0.4-SNAPSHOT uses the newer http4s 20.

from scala-server-lambda.

Thank you very much for all your help. And thanks for creating this fantastic library.

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