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returned=1 errno=0 peeraddr=140.82.121.5:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["framework","racket","restful","web","webframework"],"created_at":"2024-08-03T04:00:50.919Z","updated_at":"2026-02-18T23:02:42.522Z","avatar_url":"https://github.com/nuty.png","language":"Racket","funding_links":[],"categories":["Web Frameworks"],"sub_categories":[],"readme":"Vela\n========\nSimple web framework to build restful app in Racket. \n\n\nFeatures\n------------\n- Web handlers with Function or Class.\n- Friendly way to define url routers.\n- Pluggable middlewares when request and response.\n- Request params check and collector.\n- Entirely on the racket webserver lib.\n\n\nInstallation\n------------\n\n`raco pkg install vela`\n\n\nQuickstart\n------------\n\n```racket\n  #lang racket\n  (require vela)\n\n  (define index\n    (lambda (req)\n      (jsonify (hash 'msg \"hello world!\" ))))\n\n  (define routers\n    (urls\n      (url \"/\" index \"index\")))\n\n  (app-run routers #:port 8000)\n```\n\nDefine Handler\n-----------\nThere two ways to define a handler.\n\nUse ```handler%```\n\n```racket\n(define hello-handler\n  (class handler%\n\n    (define/public (get [id null])\n      (define req (get-field request this))\n      (jsonify (hash 'code 200 'msg \"handle get\" )))\n\n    (define/public (post)\n      (jsonify (hash 'code 200 'msg \"handle post\" )))\n\n    (define/public (put id)\n      (jsonify (hash 'code 200 'msg \"handle put\" )))\n\n    (define/public (delete id)\n      (jsonify (hash 'code 200 'msg \"handle delete\" )))\n\n    (super-new)))\n\n```\n\nUse simple function:\n\n```racket\n(define index-handler\n  (lambda (req)\n    (jsonify (hash 'code 200 'msg \"hello api\" ))))\n```\n\n  or\n\n```racket\n(define (index-handler req)\n  (jsonify (hash 'code 200 'msg \"hello api\" )))\n```\n\nResponse\n-----------\nUse ```jsonify ``` to return JSON content.\n\n```racket\n(jsonify (hash 'name \"rosso\" 'msg \"hello world!\"))\n```\n\nUse ```render ``` to render TEXT or HTML template.\n\nplain text\n\n```racket\n(render \"hello world!\")\n```\n\n\nHTML template\n\n```racket\n(require web-server/templates)\n  ...\n(render (include-template \"index.html\"))\n```\n\nURL routes\n-----------\n\nUse ```urls``` and ```url``` function to define route.\n\n```racket\n(define routers\n  (urls\n    (url \"/\" index-handler \"handler with function\")))\n```\n\nUse ```url-group``` grouping routes.\n\n\n```racket\n(define api-v1 (url-group \"/api/v1\"))\n\n(define routers\n  (urls\n\t ...\n    (api-v1\n      (url \"/hellos\" hello-handler \"hello-list/post\")\n      (url \"/hello/:id\" hello-handler \"hello-put/delete/get\"))))\n```\n\n\nUse middleware\n-----------\n\nUse middleware in ```url```  or ```url-group```.\nWhether it is request middleware or response middleware. When it returns a can-be-response?, \nthe entire request will be interrupted and the responsed by the middleware will be returned.\n\n\n```racket\n(require\n  vela\n  web-server/http/request-structs)\n\n;; handler\n(define (index req)\n  (jsonify \"hello!\"))\n\n;; middlewares\n(define (request-middleware req)\n  (displayln \"current-datetime\")\n  (jsonify \"hi!\"))\n\n(define (response-middleware req resp)\n  (displayln \"current-datetime\")\n  (jsonify \"bye!\"))\n\n;; url groups\n(define req-urls\n  (url-group \"/req\" #:on-request (list request-middleware)))\n\n(define resp-urls\n  (url-group \"/resp\" #:on-response (list response-middleware)))\n\n(define req-and-resp-urls\n  (url-group \"/both\" #:on-request (list request-middleware) #:on-response (list response-middleware)))\n\n\n;; routers\n(define middles-test-routers\n  (urls\n    (url \"/req\" index  #:on-request (list request-middleware) \"request-middleware\")\n    (url \"/resp\" index  #:on-response (list response-middleware) \"response-middleware\")\n\n    (req-urls\n      (url \"/test\" index \"test-req\"))\n\n    (resp-urls\n      (url \"/test\" index \"test-resp\"))\n\n    (req-and-resp-urls\n      (url \"/test\" index \"test-req-and-resp\"))))\n\n```\n\nrequest middleware should set a request argument is request context. response middleware must set request and response arguments.\n\n\nCustomize Headers\n-----------\nYou need require ```make-header``` from ```request-structs``` package.\n\n```racket\n(require\n   (only-in web-server/http/request-structs\n      make-header))\n\n(define my-headers\n  (list\n  \t ...\n    (make-header #\"Access-Control-Allow-Origin\" #\"*\")\n    (make-header #\"Access-Control-Allow-Methods\" #\"PUT, POST, GET, DELETE, PATCH, OPTIONS\")))\n\n```\n\nCustomize Response\n-----------\nUse ```response```fuction\n\n```racket\n(define (my-custom-rsp xml-doc)\n  (response\n    #:headers my-headers\n    #:mime #\"application/xml\"\n    #:body xml-doc))\n```\n\nexamples\n----------\nVery simple apps build with Vela in the [examples folder](https://github.com/nuty/vela/tree/master/examples).\n\n\nLicense\n-------\nLicensed under the MIT License.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnuty%2Fvela","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fnuty%2Fvela","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnuty%2Fvela/lists"}