haskell-warp | 易学教程

Minimal Warp webserver example

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问题 I want to create a website using the Warp webserver in Haskell. As I'm a Haskell beginner, examples like this one are too complex for me. Can anyone show me a simple, minimal example of how to use Warp ? Note: This question intentionally shows no research effort as it was answered Q&A-style. 回答1: Here's a minimal Hello World application using Warp 3.0+. Run it, then navigate to http://localhost:3000 . This example will show Hello world . In order to keep this example minimal, URL paths are

How to deliver JSON over HTTP using Warp with Aeson

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问题 I want to create a high-performance HTTP-based API running on Haskell using warp as a HTTP backend. The server shall return JSON data upon request. This data shall be serialized by using Aeson However, warp requires a response object whereas Aeson returns lazy ByteString s. How can I tie both libraries together? For this question's scope I'm not interested in query parsing or routing, but in an example of how to tie both libraries together to deliver a correct JSON with correct headers. Note

How to redirect requests from domain.com to www.domain in Wai/Warp app?

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问题 My site is built in Haskell/Servant and Wai/Warp. I need to redirect all requests from my domain.com to www.domain.com with the the 301 or 302 status. I know I can do that with the help of Wai/Warp somehow. How exactly? startApp :: IO () startApp = run 1234 app 回答1: The package wai-util has a convenience function redirect' to create such a Response , so you should be able to do something like app :: Application app req respond = respond =<< redirect' status302 [] uri where Just uri = parseURI

Listen on specific host using warp

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问题 When running a warp application using run, it listens on all IP adresses. For security reasons, I want to listen on localhost only, handling remote access using a reverse proxy. How do I need to call run to only listen on a specific host/IP? Note: This question intentionally shows no research effort as it was answered Q&A-Style. 回答1: The currently accepted answer got broken by changes to conduit and/or warp. Warp no longer exports a Host constructor. But you don't need it, because the

Minimal Warp webserver example

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I want to create a website using the Warp webserver in Haskell. As I'm a Haskell beginner, examples like this one are too complex for me. Can anyone show me a simple, minimal example of how to use Warp ? Note: This question intentionally shows no research effort as it was answered Q&A-style. Uli Köhler Here's a minimal Hello World application using Warp 3.0+. Run it, then navigate to http://localhost:3000 . This example will show Hello world . In order to keep this example minimal, URL paths are not handled at all (the same content is delivered for any path). For a slightly longer example

How to deliver JSON over HTTP using Warp with Aeson

阅读更多关于 How to deliver JSON over HTTP using Warp with Aeson

I want to create a high-performance HTTP-based API running on Haskell using warp as a HTTP backend. The server shall return JSON data upon request. This data shall be serialized by using Aeson However, warp requires a response object whereas Aeson returns lazy ByteString s. How can I tie both libraries together? For this question's scope I'm not interested in query parsing or routing, but in an example of how to tie both libraries together to deliver a correct JSON with correct headers. Note : This question intentionally does not show any research effort, as it was answered Q&A-style-ish. See