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