46 lines
1.3 KiB
Go
46 lines
1.3 KiB
Go
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package server
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import (
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"fmt"
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"html/template"
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"io/ioutil"
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"os"
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"github.com/valyala/fasthttp"
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"github.com/authelia/authelia/internal/logging"
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"github.com/authelia/authelia/internal/utils"
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)
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var alphaNumericRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
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// ServeIndex serve the index.html file with nonce generated for supporting
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// restrictive CSP while using material-ui.
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func ServeIndex(publicDir string) fasthttp.RequestHandler {
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f, err := os.Open(publicDir + "/index.html")
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if err != nil {
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logging.Logger().Fatalf("Unable to open index.html: %v", err)
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}
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b, err := ioutil.ReadAll(f)
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if err != nil {
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logging.Logger().Fatalf("Unable to read index.html: %v", err)
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}
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tmpl, err := template.New("index").Parse(string(b))
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if err != nil {
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logging.Logger().Fatalf("Unable to parse index.html template: %v", err)
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}
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return func(ctx *fasthttp.RequestCtx) {
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nonce := utils.RandomString(32, alphaNumericRunes)
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ctx.SetContentType("text/html; charset=utf-8")
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ctx.Response.Header.Add("Content-Security-Policy", fmt.Sprintf("default-src 'self'; style-src 'self' 'nonce-%s'", nonce))
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err := tmpl.Execute(ctx.Response.BodyWriter(), struct{ CSPNonce string }{CSPNonce: nonce})
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if err != nil {
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ctx.Error("An error occurred", 503)
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logging.Logger().Errorf("Unable to execute template: %v", err)
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return
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}
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}
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}
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