Questions tagged [http4s-circe]
18 questions
14
votes
2 answers
Add json body to http4s Request
This tut shows how to create an http4s Request: https://http4s.org/v0.18/dsl/#testing-the-service
I would like to change this request to a POST method and add a literal json body using circe. I tried the following code:
val body =…
Herman J. Radtke III
- 1,804
- 1
- 24
- 29
7
votes
1 answer
Circe Encoders and Decoders with Http4s
I am trying to use http4s, circe and http4s-circe.
Below I am trying to use the auto derivation feature of circe.
import org.http4s.client.blaze.SimpleHttp1Client
import org.http4s.Status.ResponseClass.Successful
import io.circe.syntax._
import…
Knows Not Much
- 30,395
- 60
- 197
- 373
5
votes
1 answer
Http4s Client Encode Entity as x-www-form-urlencoded Recursively
I have a request like the following
val request =
Request[IO](
method = POST,
uri = Uri.uri("..."),
headers = Headers(
Authorization(BasicCredentials("...", "..."))
)
)
…
sinanspd
- 2,589
- 3
- 19
- 37
5
votes
1 answer
Scala: http4s giving 401 Unauthorized for same request that works in curl/requests
I tried the following code using http4s v0.19.0:
import cats.effect._
def usingHttp4s(uri: String, bearerToken: String)(implicit cs: ContextShift[IO]): String = {
import scala.concurrent.ExecutionContext
import org.http4s.client.dsl.io._
…
pathikrit
- 32,469
- 37
- 142
- 221
4
votes
0 answers
PostgreSQL Error with Doobie: PSQLException: The column index is out of range: 3, number of columns: 2
I am practicing with Scala, Doobie and PostgreSQL. The database is within a Docker container. I am able to post and update jobs but unable to GET all posts. I keep getting the below error.
I have researched other similar questions but my differs as…
Ry2254
- 859
- 1
- 10
- 19
4
votes
2 answers
Http4s EntityDecoder not being auto derived for simple case class
I am getting this error:
Cannot decode into a value of type com.blah.rest.model.UserProfile,
because no EntityDecoder[cats.effect.IO, com.blah.rest.model.UserProfile]
instance could be found.
for the following case class:
case class…
iyerland
- 632
- 2
- 10
- 24
2
votes
1 answer
Http4s decoder how to customize error message for invalid fields
I have following code like:
case req @ POST -> Root =>
req
.decode[UserCreateRequest] { decodedRequest =>
my stack is http4s + zio.
Ive added custom decoder for this case class where I have a line:
email <-…
FrancMo
- 2,459
- 2
- 19
- 39
2
votes
0 answers
Getting 403 forbidden error in Get request using http4s
I am doing a short assignment in http4s and I am getting 403 error from a long time which is difficult to debug. My code is:
object Assignment extends App {
implicit val cs: ContextShift[IO] = IO.contextShift(global)
implicit val timer:…
harshul dang
- 21
- 3
2
votes
1 answer
Encoding recursive data structure into Json with Circe when running on http4s
I am building a very simply service, that should return a tree like structure defined through a recursive case class:
case class Node(id: Int, name: String, children: Seq[Node] = Seq())
But for some reason I keep getting a following compilation…
singleton
- 326
- 2
- 13
1
vote
1 answer
How to decode array containing json with Circe
I have my circe Decoder as shown below. I am confident my Sentiment Decoder works correctly so won't include it below.
case class CryptoData(value: String, valueClassification: Sentiment)
implicit val decoder: Decoder[CryptoData] =…
Ry2254
- 859
- 1
- 10
- 19
1
vote
1 answer
Http4s circe can not decode children
I have error model like:
sealed trait HttpError {
val msg: String
val cause: String
}
final case class HttpDecodingError(cause: String) extends HttpError {
override val msg: String = "Decoding error"
}
final case class…
FrancMo
- 2,459
- 2
- 19
- 39
1
vote
1 answer
Need help decoding following json with Circe
I'm trying to parse nested JSON object with Circe library. I would like to map it to flat case class ignoring some of the fields.
import io.circe.generic.auto._
import io.circe.{Decoder, Encoder, HCursor, Json}
val jsonString = """{
"parent" : {
…
marcin_koss
- 5,763
- 10
- 46
- 65
0
votes
1 answer
Decode a list of IO[Int] in http4s when returning value in response
I am currently trying to write extension for external API using http4s Client and Server tools.
My idea was: when endpoint, which I created using Server is triggered, make multiple requests (to same endpoint on external API, but with different…
Alexey Gavrilik
- 1
- 2
0
votes
0 answers
Get a Stream of Entity from an Http4s Response with Circe
I'm trying to retrieve a Stream[IO, Job] from an http4s Response, but the Scala compiler warns me that it cannot find any suitable Decoder:
Cannot decode into a value of type fs2.Stream[IO,Job], because no EntityDecoder[[+A]IO[A],…
riccardo.cardin
- 7,971
- 5
- 57
- 106
0
votes
1 answer
Circe decoder-encoder for object as json parameter type
How to write such a string-encoder decoder for circe?
For example, I have
case class Something (s: String, foo: Foo, bar: Bar)
where Bar is member of ADT
trait Bar
case object A extends Bar
case object B extends Bar
where I want to decode my…
Ostap Strashevskii
- 109
- 1
- 8