feat: add swagger ui handler in server

documentation/docs/guides/openapi.md

@@ -96,25 +96,31 @@ func main() {
 
 ## Custom UI
 
-The UI is customizable via build tags.
-For example, if you want to enable the embedded Swagger UI to work offline, you can use the `openapi_ui_local` build tag.
+Fuego `Server` exposes a `UIHandler` field that enables you to implement your custom UI.
 
-```bash
-go build -tags openapi_ui_local
-go run -tags openapi_ui_local .
-```
+Example with http swagger:
 
-|               | StopLight Elements | Swagger            | Disabled          |
-| ------------- | ------------------ | ------------------ | ----------------- |
-| Enable        | default            | `openapi_ui_local` | `openapi_ui_none` |
-| UI            | StopLight Elements | Swagger UI         | _disabled_        |
-| Works offline | No ❌              | Yes ✅             | -                 |
-| Binary Size   | Smaller            | Larger (+10Mb)     | Smaller           |
+```go
+import (
+	"net/http"
 
-If you want to implement your own UI, you can use the `openapi_ui_none` build tag and use the JSON endpoint to build your own UI.
+	httpSwagger "github.com/swaggo/http-swagger"
+)
 
-```go
-fuego.Get(s, "/my-custom-ui", func(c fuego.ContextNoBody) (fuego.HTML, error) {
-	// ... your custom UI
-})
+func openApiHandler(specURL string) http.Handler {
+	return httpSwagger.Handler(
+		httpSwagger.Layout(httpSwagger.BaseLayout),
+		httpSwagger.PersistAuthorization(true),
+		httpSwagger.URL(specURL), // The url pointing to API definition
+	)
+}
 ```
+
+The default spec url reference Element Stoplight swagger ui.
+
+Please note that if you embed swagger ui in your build it will increase its size by more than 10Mb.
+
+|               | StopLight Elements | Swagger        | Disabled |
+| ------------- | ------------------ | -------------- | -------- |
+| Works offline | No ❌              | Yes ✅         | -        |
+| Binary Size   | Smaller            | Larger (+10Mb) | Smaller  |

go.mod

@@ -10,16 +10,12 @@ require (
 	github.com/gorilla/schema v1.2.1
 	github.com/hashicorp/golang-lru/v2 v2.0.7
 	github.com/stretchr/testify v1.8.4
-	github.com/swaggo/http-swagger v1.3.4
 )
 
 require (
-	github.com/KyleBanks/depth v1.2.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
 	github.com/go-openapi/jsonpointer v0.20.2 // indirect
-	github.com/go-openapi/jsonreference v0.20.4 // indirect
-	github.com/go-openapi/spec v0.20.14 // indirect
 	github.com/go-openapi/swag v0.22.9 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
@@ -30,12 +26,9 @@ require (
 	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 // indirect
 	github.com/perimeterx/marshmallow v1.1.5 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/swaggo/files v1.0.1 // indirect
-	github.com/swaggo/swag v1.16.3 // indirect
 	golang.org/x/crypto v0.19.0 // indirect
 	golang.org/x/net v0.21.0 // indirect
 	golang.org/x/sys v0.17.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	golang.org/x/tools v0.18.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,5 +1,3 @@
-github.com/KyleBanks/depth v1.2.1 h1:5h8fQADFrWtarTdtDudMmGsC7GPbOAu6RVB3ffsVFHc=
-github.com/KyleBanks/depth v1.2.1/go.mod h1:jzSb9d0L43HxTQfT+oSA1EEp2q+ne2uh6XgeJcm8brE=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0=
@@ -8,10 +6,6 @@ github.com/getkin/kin-openapi v0.123.0 h1:zIik0mRwFNLyvtXK274Q6ut+dPh6nlxBp0x7mN
 github.com/getkin/kin-openapi v0.123.0/go.mod h1:wb1aSZA/iWmorQP9KTAS/phLj/t17B5jT7+fS8ed9NM=
 github.com/go-openapi/jsonpointer v0.20.2 h1:mQc3nmndL8ZBzStEo3JYF8wzmeWffDH4VbXz58sAx6Q=
 github.com/go-openapi/jsonpointer v0.20.2/go.mod h1:bHen+N0u1KEO3YlmqOjTT9Adn1RfD91Ar825/PuiRVs=
-github.com/go-openapi/jsonreference v0.20.4 h1:bKlDxQxQJgwpUSgOENiMPzCTBVuc7vTdXSSgNeAhojU=
-github.com/go-openapi/jsonreference v0.20.4/go.mod h1:5pZJyJP2MnYCpoeoMAql78cCHauHj0V9Lhc506VOpw4=
-github.com/go-openapi/spec v0.20.14 h1:7CBlRnw+mtjFGlPDRZmAMnq35cRzI91xj03HVyUi/Do=
-github.com/go-openapi/spec v0.20.14/go.mod h1:8EOhTpBoFiask8rrgwbLC3zmJfz4zsCUueRuPM6GNkw=
 github.com/go-openapi/swag v0.22.9 h1:XX2DssF+mQKM2DHsbgZK74y/zj4mo9I99+89xUmuZCE=
 github.com/go-openapi/swag v0.22.9/go.mod h1:3/OXnFfnMAwBD099SwYRk7GD3xOrr1iL7d/XNLXVVwE=
 github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
@@ -51,54 +45,19 @@ github.com/perimeterx/marshmallow v1.1.5/go.mod h1:dsXbUu8CRzfYP5a87xpp0xq9S3u0V
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
+github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-github.com/swaggo/files v1.0.1 h1:J1bVJ4XHZNq0I46UU90611i9/YzdrF7x92oX1ig5IdE=
-github.com/swaggo/files v1.0.1/go.mod h1:0qXmMNH6sXNf+73t65aKeB+ApmgxdnkQzVTAj2uaMUg=
-github.com/swaggo/http-swagger v1.3.4 h1:q7t/XLx0n15H1Q9/tk3Y9L4n210XzJF5WtnDX64a5ww=
-github.com/swaggo/http-swagger v1.3.4/go.mod h1:9dAh0unqMBAlbp1uE2Uc2mQTxNMU/ha4UbucIg1MFkQ=
-github.com/swaggo/swag v1.16.3 h1:PnCYjPCah8FK4I26l2F/KQ4yz3sILcVUN3cTlBFA9Pg=
-github.com/swaggo/swag v1.16.3/go.mod h1:DImHIuOFXKpMFAQjcC7FG4m3Dg4+QuUgUzJmKjI/gRk=
 github.com/ugorji/go/codec v1.2.7 h1:YPXUKf7fYbp/y8xloBqZOw2qaVggbfwMlI8WM3wZUJ0=
 github.com/ugorji/go/codec v1.2.7/go.mod h1:WGN1fab3R1fzQlVQTkfxVtIBhWDRqOviHU95kRgeqEY=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.19.0 h1:ENy+Az/9Y1vSrlrvBSyna3PITt4tiZLf7sgCjZBX7Wo=
 golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/mod v0.15.0 h1:SernR4v+D55NyBH2QiEQrlBAnj1ECL6AGrA5+dPaMY8=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
 golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
 golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/tools v0.18.0 h1:k8NLag8AGHnn+PHbl7g43CtqZAwG60vZkLqgyZgIHgQ=
-golang.org/x/tools v0.18.0/go.mod h1:GL7B4CwcLLeo59yx/9UWWuNOW1n3VZ4f5axWfML7Lcg=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

openapi.go

@@ -92,7 +92,7 @@ func generateSwagger(s *Server, jsonSpec []byte) {
 		_, _ = w.Write(jsonSpec)
 	})
 
-	Handle(s, s.OpenapiConfig.SwaggerUrl+"/", openApiHandler(s.OpenapiConfig.JsonUrl))
+	Handle(s, s.OpenapiConfig.SwaggerUrl+"/", s.UIHandler(s.OpenapiConfig.JsonUrl))
 
 	slog.Info(fmt.Sprintf("JSON spec: http://localhost%s%s", s.Server.Addr, s.OpenapiConfig.JsonUrl))
 	slog.Info(fmt.Sprintf("OpenAPI UI: http://localhost%s%s/index.html", s.Server.Addr, s.OpenapiConfig.SwaggerUrl))

openapi_handler_online.go → openapi_handler.go

@@ -1,12 +1,10 @@
-//go:build !openapi_ui_local && !openapi_ui_none
-
 package fuego
 
 import (
 	"net/http"
 )
 
-func openApiHandler(specURL string) http.Handler {
+func defaultOpenAPIHandler(specURL string) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "text/html; charset=utf-8")
 		_, _ = w.Write([]byte(`<!doctype html>

options.go

@@ -40,7 +40,8 @@ type Server struct {
 
 	basePath string
 
-	OpenApiSpec openapi3.T // OpenAPI spec generated by the server
+	OpenApiSpec openapi3.T                        // OpenAPI spec generated by the server
+	UIHandler   func(specURL string) http.Handler // Handler to serve the openapi ui from spec url
 
 	Security Security
 
@@ -80,6 +81,7 @@ func NewServer(options ...func(*Server)) *Server {
 		OpenApiSpec: NewOpenApiSpec(),
 
 		OpenapiConfig: defaultOpenapiConfig,
+		UIHandler:     defaultOpenAPIHandler,
 
 		Security: NewSecurity(),
 	}