syntax fixes

pkg/cache/cache.go

@@ -14,7 +14,7 @@ type CachedPage struct {
 }
 
 type Cache struct {
-	sync.RWMutex
+	mu    sync.RWMutex
 	Cache map[string]*CachedPage
 }
 
@@ -24,8 +24,8 @@ func NewCache() *Cache {
 
 func (c *Cache) Add(title string, p *core.Page) {
 	now := time.Now()
-	c.Lock()
-	defer c.Unlock()
+	c.mu.Lock()
+	defer c.mu.Unlock()
 	cp, ok := c.Cache[title]
 	if ok && now.After(cp.CacheTime) {
 		cp.Page = p
@@ -37,8 +37,8 @@ func (c *Cache) Add(title string, p *core.Page) {
 }
 
 func (c *Cache) Get(title string) (p *core.Page) {
-	c.RLock()
-	defer c.RUnlock()
+	c.mu.RLock()
+	defer c.mu.RUnlock()
 	if cp, ok := c.Cache[title]; ok {
 		p = new(core.Page)
 		*p = *cp.Page
@@ -48,7 +48,7 @@ func (c *Cache) Get(title string) (p *core.Page) {
 }
 
 func (c *Cache) Delete(title string) {
-	c.Lock()
+	c.mu.Lock()
 	delete(c.Cache, title)
-	c.Unlock()
+	c.mu.Unlock()
 }