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Add SSR for compliance page with dynamic title and meta tags

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Implement server-side rendering of trust center page `<head>` with dynamic organization name and OG meta tags. Adds generic `FileRenderer` mechanism to statichandler for dynamic file rendering, allowing the trust server to inject templated content at request time.

Signed-off-by: Bryan Frimin <bryan@getprobo.com>
This commit is contained in:
Bryan Frimin
2026-03-18 15:55:18 +01:00
parent ea21f85887
commit 751d9eb1f3
5 changed files with 177 additions and 51 deletions
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115
pkg/server/statichandler/statichandler.go
View File

@@ -27,20 +27,39 @@ import (
"strings"
)
type GzipOptions struct {
EnableFileTypeCheck bool
FileTypes []string
type (
// FileRenderer renders dynamic content for a given file path. When
// registered via WithFileRenderer, the server calls it instead of serving
// the static embedded bytes. The renderer writes the response body to w.
FileRenderer func(w io.Writer, r *http.Request) error
Option func(*Server)
GzipOptions struct {
EnableFileTypeCheck bool
FileTypes []string
}
Server struct {
spaFS http.FileSystem
etags map[string]string
indexETag string
indexContent []byte
gzipOptions GzipOptions
fileRenderers map[string]FileRenderer
}
)
// WithFileRenderer registers a dynamic renderer for the given path (e.g.
// "/index.html"). When the server would serve that file, it calls the
// renderer instead. ETag-based caching is disabled for rendered files.
func WithFileRenderer(path string, renderer FileRenderer) Option {
return func(s *Server) {
s.fileRenderers[path] = renderer
}
}
type Server struct {
spaFS http.FileSystem
etags map[string]string
indexETag string
indexContent []byte
gzipOptions GzipOptions
}
func NewServer(staticFiles fs.FS, distPath string, gzipOptions GzipOptions) (*Server, error) {
func NewServer(staticFiles fs.FS, distPath string, gzipOptions GzipOptions, opts ...Option) (*Server, error) {
subFS, err := fs.Sub(staticFiles, distPath)
if err != nil {
return nil, err
@@ -104,13 +123,41 @@ func NewServer(staticFiles fs.FS, distPath string, gzipOptions GzipOptions) (*Se
return nil, err
}
return &Server{
spaFS: http.FS(subFS),
indexETag: indexETag,
indexContent: indexContent,
etags: etags,
gzipOptions: gzipOptions,
}, nil
s := &Server{
spaFS: http.FS(subFS),
indexETag: indexETag,
indexContent: indexContent,
etags: etags,
gzipOptions: gzipOptions,
fileRenderers: make(map[string]FileRenderer),
}
for _, opt := range opts {
opt(s)
}
return s, nil
}
func (s *Server) serveIndex(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
if renderer, ok := s.fileRenderers["/index.html"]; ok {
w.WriteHeader(http.StatusOK)
_ = renderer(w, r)
return
}
w.Header().Set("ETag", `"`+s.indexETag+`"`)
if r.Header.Get("If-None-Match") == `"`+s.indexETag+`"` {
w.WriteHeader(http.StatusNotModified)
return
}
w.WriteHeader(http.StatusOK)
_, _ = w.Write(s.indexContent)
}
func (s *Server) ServeSPA(w http.ResponseWriter, r *http.Request) {
@@ -118,18 +165,7 @@ func (s *Server) ServeSPA(w http.ResponseWriter, r *http.Request) {
f, err := s.spaFS.Open(path)
if err != nil {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.Header().Set("ETag", `"`+s.indexETag+`"`)
if r.Header.Get("If-None-Match") == `"`+s.indexETag+`"` {
w.WriteHeader(http.StatusNotModified)
return
}
w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
w.WriteHeader(http.StatusOK)
_, _ = w.Write(s.indexContent)
s.serveIndex(w, r)
return
}
@@ -142,20 +178,15 @@ func (s *Server) ServeSPA(w http.ResponseWriter, r *http.Request) {
}
if info.IsDir() {
s.serveIndex(w, r)
return
}
if renderer, ok := s.fileRenderers[path]; ok {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.Header().Set("ETag", `"`+s.indexETag+`"`)
if r.Header.Get("If-None-Match") == `"`+s.indexETag+`"` {
w.WriteHeader(http.StatusNotModified)
return
}
w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
w.Header().Set("Pragma", "no-cache")
w.Header().Set("Expires", "0")
w.WriteHeader(http.StatusOK)
_, _ = w.Write(s.indexContent)
_ = renderer(w, r)
return
}