mirror of https://github.com/grafana/grafana
FEMT: Add feature toggle and expose the service in regular grafana (#104428)
Ryan McKinley
4 weeks ago
committed by
GitHub
parent
29b3738bc8
commit
7b492d7e16
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@ -0,0 +1,108 @@ |
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package frontend |
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import ( |
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"context" |
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"embed" |
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"errors" |
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"fmt" |
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"html/template" |
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"net/http" |
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"syscall" |
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"github.com/grafana/grafana-app-sdk/logging" |
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"github.com/grafana/grafana/pkg/api/dtos" |
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"github.com/grafana/grafana/pkg/api/webassets" |
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"github.com/grafana/grafana/pkg/middleware" |
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"github.com/grafana/grafana/pkg/services/licensing" |
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"github.com/grafana/grafana/pkg/setting" |
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) |
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type IndexProvider struct { |
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log logging.Logger |
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index *template.Template |
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data IndexViewData |
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} |
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type IndexViewData struct { |
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CSPContent string |
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CSPEnabled bool |
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IsDevelopmentEnv bool |
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AppSubUrl string |
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BuildVersion string |
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BuildCommit string |
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AppTitle string |
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Assets *dtos.EntryPointAssets // Includes CDN info
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// Nonce is a cryptographic identifier for use with Content Security Policy.
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Nonce string |
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} |
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// Templates setup.
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var ( |
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//go:embed *.html
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templatesFS embed.FS |
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// templates
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htmlTemplates = template.Must(template.New("html").Delims("[[", "]]").ParseFS(templatesFS, `*.html`)) |
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) |
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func NewIndexProvider(cfg *setting.Cfg, license licensing.Licensing) (*IndexProvider, error) { |
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assets, err := webassets.GetWebAssets(context.Background(), cfg, license) |
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if err != nil { |
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return nil, err |
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} |
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t := htmlTemplates.Lookup("index.html") |
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if t == nil { |
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return nil, fmt.Errorf("missing index template") |
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} |
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return &IndexProvider{ |
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log: logging.DefaultLogger.With("logger", "index-provider"), |
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index: t, |
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data: IndexViewData{ |
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AppTitle: "Grafana", |
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AppSubUrl: cfg.AppSubURL, // Based on the request?
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BuildVersion: cfg.BuildVersion, |
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BuildCommit: cfg.BuildCommit, |
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Assets: assets, |
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CSPEnabled: cfg.CSPEnabled, |
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CSPContent: cfg.CSPTemplate, |
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IsDevelopmentEnv: cfg.Env == setting.Dev, |
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}, |
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}, nil |
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} |
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func (p *IndexProvider) HandleRequest(writer http.ResponseWriter, request *http.Request) { |
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if request.Method != "GET" { |
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writer.WriteHeader(http.StatusMethodNotAllowed) |
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return |
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} |
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nonce, err := middleware.GenerateNonce() |
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if err != nil { |
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p.log.Error("error creating nonce", "err", err) |
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writer.WriteHeader(500) |
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return |
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} |
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// TODO -- restructure so the static stuff is under one variable and the rest is dynamic
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data := p.data // copy everything
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data.Nonce = nonce |
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if data.CSPEnabled { |
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data.CSPContent = middleware.ReplacePolicyVariables(p.data.CSPContent, p.data.AppSubUrl, data.Nonce) |
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} |
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writer.Header().Set("Content-Type", "text/html; charset=UTF-8") |
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writer.WriteHeader(200) |
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if err := p.index.Execute(writer, &data); err != nil { |
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if errors.Is(err, syscall.EPIPE) { // Client has stopped listening.
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return |
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} |
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panic(fmt.Sprintf("Error rendering index\n %s", err.Error())) |
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} |
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} |
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@ -0,0 +1,33 @@ |
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<!DOCTYPE html> |
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<html> |
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<head> |
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[[ if and .CSPEnabled .IsDevelopmentEnv ]] |
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<!-- Cypress overwrites CSP headers in HTTP requests, so this is required for e2e tests--> |
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<meta http-equiv="Content-Security-Policy" content="[[.CSPContent]]"/> |
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[[ end ]] |
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<meta charset="utf-8" /> |
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<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> |
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<meta name="viewport" content="width=device-width" /> |
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<meta name="theme-color" content="#000" /> |
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<title>[[.AppTitle]]</title> |
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<base href="[[.AppSubUrl]]/" /> |
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<link rel="mask-icon" href="[[.Assets.ContentDeliveryURL]]public/img/grafana_mask_icon.svg" color="#F05A28" /> |
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[[range $asset := .Assets.CSSFiles]] |
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<link rel="stylesheet" href="[[$asset.FilePath]]" /> |
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[[end]] |
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<script nonce="[[.Nonce]]"> |
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performance.mark('frontend_boot_css_time_seconds'); |
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</script> |
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</head> |
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<body> |
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<h1>Grafana Frontend Server ([[.BuildVersion]])</h1> |
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<p>This is a simple static HTML page served by the Grafana frontend server module.</p> |
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</body> |
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</html> |
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