cache jonker for a bit

activity.go

@@ -1167,7 +1167,11 @@ func honkworldwide(user *WhatAbout, honk *Honk) {
 	}
 }
 
-func asjonker(user *WhatAbout) junk.Junk {
+var oldjonkers = cacheNew(cacheOptions{Filler: func(name string) ([]byte, bool) {
+	user, err := butwhatabout(name)
+	if err != nil {
+		return nil, false
+	}
 	about := markitzero(user.About)
 
 	j := junk.New()
@@ -1193,7 +1197,15 @@ func asjonker(user *WhatAbout) junk.Junk {
 	k["publicKeyPem"] = user.Key
 	j["publicKey"] = k
 
-	return j
+	var buf bytes.Buffer
+	j.Write(&buf)
+	return buf.Bytes(), true
+}, Duration: 1 * time.Minute})
+
+func asjonker(name string) ([]byte, bool) {
+	var j []byte
+	ok := oldjonkers.Get(name, &j)
+	return j, ok
 }
 
 var handfull = cacheNew(cacheOptions{Filler: func(name string) (string, bool) {

cache.go

@@ -18,18 +18,22 @@ package main
 import (
 	"reflect"
 	"sync"
+	"time"
 )
 
 type cacheFiller func(key interface{}) (interface{}, bool)
 
 type cacheOptions struct {
 	Filler   interface{}
+	Duration time.Duration
 }
 
 type Cache struct {
 	cache    map[interface{}]interface{}
 	filler   cacheFiller
 	lock     sync.Mutex
+	stale    time.Time
+	duration time.Duration
 }
 
 func cacheNew(options cacheOptions) *Cache {
@@ -49,12 +53,20 @@ func cacheNew(options cacheOptions) *Cache {
 		rv := vfn.Call(args)
 		return rv[0].Interface(), rv[1].Bool()
 	}
+	if options.Duration != 0 {
+		c.duration = options.Duration
+		c.stale = time.Now().Add(c.duration)
+	}
 	return c
 }
 
 func (cache *Cache) Get(key interface{}, value interface{}) bool {
 	cache.lock.Lock()
 	defer cache.lock.Unlock()
+	if !cache.stale.IsZero() && cache.stale.Before(time.Now()) {
+		cache.stale = time.Now().Add(cache.duration)
+		cache.cache = make(map[interface{}]interface{})
+	}
 	v, ok := cache.cache[key]
 	if !ok {
 		v, ok = cache.filler(key)

database.go

@@ -28,9 +28,9 @@ import (
 	"humungus.tedunangst.com/r/webs/login"
 )
 
-var someusers = cacheNew(cacheOptions { Filler: func(name string) (*WhatAbout, bool) {
+var someusers = cacheNew(cacheOptions{Filler: func(name string) (*WhatAbout, bool) {
 	row := stmtWhatAbout.QueryRow(name)
-	user := new (WhatAbout)
+	user := new(WhatAbout)
 	var options string
 	err := row.Scan(&user.ID, &user.Name, &user.Display, &user.About, &user.Key, &options)
 	if err != nil {

web.go

@@ -531,9 +531,13 @@ func showuser(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if friendorfoe(r.Header.Get("Accept")) {
-		j := asjonker(user)
+		j, ok := asjonker(name)
+		if ok {
 			w.Header().Set("Content-Type", theonetruename)
-		j.Write(w)
+			w.Write(j)
+		} else {
+			http.NotFound(w, r)
+		}
 		return
 	}
 	u := login.GetUserInfo(r)