5265b12cc7
- Add home_content setting for custom homepage (HTML or iframe URL) - Inject public settings into index.html to eliminate page flash - Support ETag caching with automatic invalidation on settings update - Add Vite plugin for dev mode settings injection - Refactor HomeView to use appStore instead of local API calls
78 lines
1.7 KiB
Go
78 lines
1.7 KiB
Go
//go:build embed
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package web
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import (
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"crypto/sha256"
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"encoding/hex"
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"sync"
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)
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// HTMLCache manages the cached index.html with injected settings
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type HTMLCache struct {
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mu sync.RWMutex
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cachedHTML []byte
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etag string
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baseHTMLHash string // Hash of the original index.html (immutable after build)
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settingsVersion uint64 // Incremented when settings change
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}
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// CachedHTML represents the cache state
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type CachedHTML struct {
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Content []byte
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ETag string
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}
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// NewHTMLCache creates a new HTML cache instance
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func NewHTMLCache() *HTMLCache {
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return &HTMLCache{}
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}
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// SetBaseHTML initializes the cache with the base HTML template
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func (c *HTMLCache) SetBaseHTML(baseHTML []byte) {
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c.mu.Lock()
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defer c.mu.Unlock()
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hash := sha256.Sum256(baseHTML)
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c.baseHTMLHash = hex.EncodeToString(hash[:8]) // First 8 bytes for brevity
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}
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// Invalidate marks the cache as stale
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func (c *HTMLCache) Invalidate() {
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c.mu.Lock()
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defer c.mu.Unlock()
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c.settingsVersion++
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c.cachedHTML = nil
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c.etag = ""
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}
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// Get returns the cached HTML or nil if cache is stale
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func (c *HTMLCache) Get() *CachedHTML {
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c.mu.RLock()
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defer c.mu.RUnlock()
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if c.cachedHTML == nil {
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return nil
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}
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return &CachedHTML{
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Content: c.cachedHTML,
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ETag: c.etag,
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}
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}
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// Set updates the cache with new rendered HTML
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func (c *HTMLCache) Set(html []byte, settingsJSON []byte) {
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c.mu.Lock()
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defer c.mu.Unlock()
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c.cachedHTML = html
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c.etag = c.generateETag(settingsJSON)
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}
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// generateETag creates an ETag from base HTML hash + settings hash
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func (c *HTMLCache) generateETag(settingsJSON []byte) string {
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settingsHash := sha256.Sum256(settingsJSON)
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return `"` + c.baseHTMLHash + "-" + hex.EncodeToString(settingsHash[:8]) + `"`
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}
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