Improve caching a bit

Rewrite blobcache to use sqlite as backend store.
Add support for conditional gets in HTTP client (both modification time
and etag).

Makefile

@@ -75,6 +75,7 @@ endif
 SRCS-${CONFIG_EMU_THREAD_SPECIFICS} += src/arch/emu_thread_specifics.c
 
 BUNDLES += resources/metadb
+BUNDLES += resources/cachedb
 
 #
 # Misc support

resources/cachedb/001.sql

@@ -0,0 +1,11 @@
+CREATE TABLE item (
+ stash TEXT,
+ k TEXT,
+ lastaccess INTEGER,
+ expiry INTEGER,
+ modtime INTEGER,
+ etag TEXT,
+ payload BLOB,
+ UNIQUE(k, stash) ON CONFLICT FAIL);
+
+CREATE INDEX item_key_idx ON item(stash, k);

src/api/lastfm.c

@@ -191,7 +191,8 @@ write_to_blobcache(const char *artist, struct artist_image_queue *q)
  free(ai);
  }
 
- blobcache_put(artist, "lastfm.artist.images", blob, blobsize, 86400);
+ blobcache_put(artist, "lastfm.artist.images", blob, blobsize, 86400,
+ NULL, 0);
  free(blob);
 }
 
@@ -206,7 +207,8 @@ load_from_blobcache(const char *artist, prop_t *parent)
  size_t size;
  prop_t *p;
 
- s0 = data = blobcache_get(artist, "lastfm.artist.images", &size, 1);
+ s0 = data = blobcache_get(artist, "lastfm.artist.images", &size, 1, 0,
+ NULL, NULL);
  if(data == NULL)
  return 0;
 

src/backend/sid/sid.c

@@ -45,7 +45,7 @@ be_sid2player_play(const char *url0, media_pipe_t *mp,
 
  void *player;
  void *data;
- struct fa_stat fs;
+ size_t size;
 
 
  url0 += strlen("sidplayer:");
@@ -60,10 +60,10 @@ be_sid2player_play(const char *url0, media_pipe_t *mp,
  *p++= 0;
  subsong = atoi(p);
 
- if((data = fa_quickload(url, &fs, NULL, errbuf, errlen)) == NULL)
+ if((data = fa_quickload(url, &size, NULL, errbuf, errlen, NULL)) == NULL)
  return NULL;
 
- player = sidcxx_load(data, fs.fs_size, subsong, errbuf, errlen);
+ player = sidcxx_load(data, size, subsong, errbuf, errlen);
  free(data);
  if(player == NULL)
  return NULL;