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package middleware
import (
"bytes"
"fmt"
"html/template"
"net/http"
"path"
)
// RapiDocOpts configures the RapiDoc middlewares
type RapiDocOpts struct {
// BasePath for the UI, defaults to: /
BasePath string
// Path combines with BasePath to construct the path to the UI, defaults to: "docs".
Path string
// SpecURL is the URL of the spec document.
//
// Defaults to: /swagger.json
SpecURL string
// Title for the documentation site, default to: API documentation
Title string
// Template specifies a custom template to serve the UI
Template string
// RapiDocURL points to the js asset that generates the rapidoc site.
//
// Defaults to https://unpkg.com/rapidoc/dist/rapidoc-min.js
RapiDocURL string
}
func (r *RapiDocOpts) EnsureDefaults() {
common := toCommonUIOptions(r)
common.EnsureDefaults()
fromCommonToAnyOptions(common, r)
// rapidoc-specifics
if r.RapiDocURL == "" {
r.RapiDocURL = rapidocLatest
}
if r.Template == "" {
r.Template = rapidocTemplate
}
}
// RapiDoc creates a middleware to serve a documentation site for a swagger spec.
//
// This allows for altering the spec before starting the http listener.
func RapiDoc(opts RapiDocOpts, next http.Handler) http.Handler {
opts.EnsureDefaults()
pth := path.Join(opts.BasePath, opts.Path)
tmpl := template.Must(template.New("rapidoc").Parse(opts.Template))
assets := bytes.NewBuffer(nil)
if err := tmpl.Execute(assets, opts); err != nil {
panic(fmt.Errorf("cannot execute template: %w", err))
}
return serveUI(pth, assets.Bytes(), next)
}
const (
rapidocLatest = "https://unpkg.com/rapidoc/dist/rapidoc-min.js"
rapidocTemplate = `<!doctype html>
<html>
<head>
<title>{{ .Title }}</title>
<meta charset="utf-8"> <!-- Important: rapi-doc uses utf8 characters -->
<script type="module" src="{{ .RapiDocURL }}"></script>
</head>
<body>
<rapi-doc spec-url="{{ .SpecURL }}"></rapi-doc>
</body>
</html>
`
)