http4s | A minimal , idiomatic Scala interface for HTTP | HTTP library

by http4s Scala Version: v0.23.20 License: Apache-2.0

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | http4s Summary

http4s is a Scala library typically used in Networking, HTTP applications. http4s has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Http4s is a minimal, idiomatic Scala interface for HTTP services. Http4s is Scala's answer to Ruby's Rack, Python's WSGI, Haskell's WAI, and Java's Servlets. Learn more at http4s.org. If you run into any difficulties on Scala 2.12 please enable partial unification in your build.sbt (not needed for Scala 2.13 and beyond, because they enable partial unification by default).

Support

Quality

Security

License

Reuse

Support

http4s has a medium active ecosystem.

It has 2421 star(s) with 773 fork(s). There are 76 watchers for this library.

There were 2 major release(s) in the last 12 months.

There are 225 open issues and 1126 have been closed. On average issues are closed in 149 days. There are 96 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of http4s is v0.23.20

Quality

http4s has 0 bugs and 0 code smells.

Security

http4s has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

http4s code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

http4s is licensed under the Apache-2.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

http4s releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

It has 61842 lines of code, 3912 functions and 782 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

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http4s Key Features

No Key Features are available at this moment for http4s.

http4s Examples and Code Snippets

No Code Snippets are available at this moment for http4s.

Community Discussions

Trending Discussions on http4s

How to integrate Prometheus Metrics Middleware with http4s DSL service

Ajax POST request with Array[Byte] response

Scala 3 + http4s problem with encode/decode json

A journey from akka-stream to fs2 - how to define an akka-stream http flow like stage in fs2 using http4s

How to compose an effect with an Http4s HttpRoutes?

MongoDriver for Scala + http4s : How to check if createCollection() throws an exception?

What is the name of the design pattern for marshalling in libraries like Akka Http or http4s?

Need clarification for confusing Http4s Message Type `Response[F]` / `Request[F]`

Decode an optional query parameter using QueryParamDecoder in Scala

How to compose two Http4s routes with zio effect and different types of environment

QUESTION

How to integrate Prometheus Metrics Middleware with http4s DSL service

Asked 2022-Feb-18 at 17:59

To analyze the performance issues with our ember-server, Trying to get the server metrics on prometheus using the document mentioned here: https://http4s.org/v0.23/middleware/

build.sbt

...

ANSWER

Answered 2022-Feb-18 at 17:59

try:

Source https://stackoverflow.com/questions/71075080

QUESTION

Ajax POST request with Array[Byte] response

Asked 2021-Dec-26 at 18:42

I'm receiving an ajax POST request and need to process the body data as a ByteBuffer and respond with an Array[Byte] using Http4s (0.23.7). This is as far I have been able to put things together, although it's not working yet:

...

ANSWER

Answered 2021-Dec-26 at 18:42

The following code is written on top of my head and following the docs, since I can't test it right now.
(thus it may have some typos / errors; if you find one please feel free to edit the answer and thanks!)

Source https://stackoverflow.com/questions/70487757

QUESTION

Scala 3 + http4s problem with encode/decode json

Asked 2021-Nov-15 at 15:57

I have a Scala 3 project (3.0.0 version) and I'm trying to build simple Rest API with http4s.

I have a problem with decoding/encoding JSON.

I'm building my code based on http4s.g8.

The issue occurs on this line:

...

ANSWER

Answered 2021-Nov-15 at 15:57

final case class Joke(joke: String) extends AnyVal

Source https://stackoverflow.com/questions/69961089

QUESTION

A journey from akka-stream to fs2 - how to define an akka-stream http flow like stage in fs2 using http4s

Asked 2021-Oct-09 at 16:10

i'm on my journey to deepen my knowledge in fs2, and want to try fs2-kafka for a use case where i would replace akka stream. The idea is simple, read from kafka and post data via http request to a sink, then commit back to kafka on success. So far i can't really figure out the http part. In akka stream / akka http you have out of the box a flow for that https://doc.akka.io/docs/akka-http/current/client-side/host-level.html#using-a-host-connection-pool

...

ANSWER

Answered 2021-Oct-09 at 16:10

The thing with the typelevel ecosystem is that everything is just a library, you don't need examples on how many of them interact together, you just need to understand how each library works and the basic rules of composition.

Source https://stackoverflow.com/questions/69503676

QUESTION

How to compose an effect with an Http4s HttpRoutes?

Asked 2021-Jul-20 at 20:42

I have an http4s HttpRoutes and a task in my effect type (ZIO, if that matters). The effect is side-effecting and returns no value. I want to compose the two together, creating a new HttpRoutes that will run the effect before any matching route in the HttpRoutes.

...

ANSWER

Answered 2021-Jul-08 at 13:08

Naive implementation according to https://http4s.org/v0.21/middleware

works for me

Source https://stackoverflow.com/questions/68277069

QUESTION

MongoDriver for Scala + http4s : How to check if createCollection() throws an exception?

Asked 2021-Jul-19 at 11:05

I'm a Scala - http4s beginner.
I have to create a MVC application for my job using Scala with http4s and I'm facing the following problem :

I can't catch mongo driver exceptions inside Repository

One of my tasks is to create new databases for some requests so I started to design the function "createDatabase" inside my Repository.
According to the documentation :

MongoDatabase instance provides methods to interact with a database but the database might not actually exist and will only be created on the insertion of data via some means; e.g. the creation of a collection or the insertion of documents

so my code is :

...

ANSWER

Answered 2021-Jul-19 at 11:05

Tackled the problem using atempt

Source https://stackoverflow.com/questions/68406578

QUESTION

What is the name of the design pattern for marshalling in libraries like Akka Http or http4s?

Asked 2021-Jul-15 at 13:54

In libraries like akka-http or http4s there is always a pattern where you define objects doing the marshalling from/to JSON. When you later need to use the serialization you import the implicits so they are used in function methods.

For a project unrelated to REST apis, I want to implement the same design pattern for serializing case classes into RDF.

What is the name of the design pattern? Where could I find a concise description of the pattern so I don't have to reverse engineer those libraries?

...

ANSWER

Answered 2021-Jul-15 at 13:54

It's done using type class (for serialization logic) and implicit class (to extend method syntax).

Create type class - it's a generic trait:

Source https://stackoverflow.com/questions/68363101

QUESTION

Need clarification for confusing Http4s Message Type `Response[F]` / `Request[F]`

Asked 2021-Jun-10 at 11:50

I have a hard time understanding why Request and Response are parameterized in F.

Taking something similar is the cats effect datatype Resource.

From the documentation

https://typelevel.org/cats-effect/docs/std/resource

We find the following definition

...

ANSWER

Answered 2021-Jun-10 at 11:50

Let's see the definition for Http[F, G], which is at the core of http4s:

Source https://stackoverflow.com/questions/67916337

QUESTION

Decode an optional query parameter using QueryParamDecoder in Scala

Asked 2021-May-26 at 18:26

I want to decode an optional query parameter in my Scala code. I'm using http4s. The parameter is of the form ?part=35/43. End goal is to store this fraction as a Type Part = (Int, Int) so that we can have (35, 43) as a tuple to use further in the code. I've created an Object like: https://http4s.org/v0.18/dsl/#optional-query-parameters

...

ANSWER

Answered 2021-May-26 at 18:26

well, the simplest approach would be to use .catchOnly[Throwable] (or even QueryParamDecoder .fromUnsafeCast directly) and it will catch any error.

However, I personally would prefer to do something like this:
(I couldn't compile the code right now, so apologies if it has some typos)

Source https://stackoverflow.com/questions/67710359

QUESTION

How to compose two Http4s routes with zio effect and different types of environment

Asked 2021-Feb-05 at 16:23

I have two Http4s routes:

...

ANSWER

Answered 2021-Jan-30 at 20:09

Let's dealias things:

Source https://stackoverflow.com/questions/65968564

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install http4s

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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