set 60s timeout on errors; #99

modules/cache.js

@@ -92,11 +92,14 @@ exp.info = function(callback) {
   });
 };
 
-// sets the timestamp for +userId+ and its face file's date to now
+// sets the timestamp for +userId+ and its face file's (+hash+) date to the current time
+// if +temp+ is true, the timestamp is set so that the record will be outdated after 60 seconds
+// these 60 seconds match the duration of Mojang's rate limit ban
 // +callback+ contains error
-exp.update_timestamp = function(rid, userId, hash, callback) {
+exp.update_timestamp = function(rid, userId, hash, temp, callback) {
   logging.log(rid + "cache: updating timestamp");
-  var time = new Date().getTime();
+  sub = temp ? (config.local_cache_time - 60) : 0;
+  var time = new Date().getTime() - sub;
   // store userId in lower case if not null
   userId = userId && userId.toLowerCase();
   redis.hmset(userId, "t", time, function(err) {
@@ -105,20 +108,32 @@ exp.update_timestamp = function(rid, userId, hash, callback) {
   update_file_date(rid, hash);
 };
 
-// create the key +userId+, store +skin_hash+ hash, +cape_hash+ hash and time
+// create the key +userId+, store +skin_hash+, +cape_hash+ and time
+// if either +skin_hash+ or +cape_hash+ are undefined, they will not be stored
+// this feature can be used to write both cape and skin at separate times
 // +callback+ contans error
 exp.save_hash = function(rid, userId, skin_hash, cape_hash, callback) {
   logging.log(rid + "cache: saving hash");
   logging.log(rid + "skin:" + skin_hash + " cape:" + cape_hash);
   var time = new Date().getTime();
   // store shorter null byte instead of "null"
-  skin_hash = skin_hash || ".";
+  skin_hash = (skin_hash === null ? "." : skin_hash);
-  cape_hash = cape_hash || ".";
+  cape_hash = (cape_hash === null ? "." : cape_hash);
   // store userId in lower case if not null
   userId = userId && userId.toLowerCase();
+  if (skin_hash === undefined) {
+    redis.hmset(userId, "c", cape_hash, "t", time, function(err){
+      callback(err);
+    });
+  } else if (cape_hash === undefined) {
+    redis.hmset(userId, "s", skin_hash, "t", time, function(err){
+      callback(err);
+    });
+  } else {
     redis.hmset(userId, "s", skin_hash, "c", cape_hash, "t", time, function(err){
       callback(err);
     });
+  }
 };
 
 // removes the hash for +userId+ from the cache
@@ -129,7 +144,8 @@ exp.remove_hash = function(rid, userId) {
 
 // get a details object for +userId+
 // {skin: "0123456789abcdef", cape: "gs1gds1g5d1g5ds1", time: 1414881524512}
-// null when userId unkown
+// +callbacl+ contains error, details
+// details is null when userId not cached
 exp.get_details = function(userId, callback) {
   // get userId in lower case if not null
   userId = userId && userId.toLowerCase();
@@ -137,8 +153,8 @@ exp.get_details = function(userId, callback) {
     var details = null;
     if (data) {
       details = {
-        skin: (data.s === "." ? null : data.s),
+        skin: (!data.s || data.s === ".") ? null : data.s,
-        cape: (data.c === "." ? null : data.c),
+        cape: (!data.c || data.c === ".") ? null : data.c,
         time: Number(data.t)
       };
     }

modules/helpers.js

@@ -16,11 +16,11 @@ function get_hash(url) {
 }
 
 function store_skin(rid, userId, profile, details, callback) {
-  networking.get_skin_url(rid, userId, profile, function(url) {
+  networking.get_skin_url(rid, userId, profile, function(err, url) {
-    if (url) {
+    if (!err && url) {
       var skin_hash = get_hash(url);
       if (details && details.skin === skin_hash) {
-        cache.update_timestamp(rid, userId, skin_hash, function(err) {
+        cache.update_timestamp(rid, userId, skin_hash, false, function(err) {
           callback(err, skin_hash);
         });
       } else {
@@ -55,17 +55,17 @@ function store_skin(rid, userId, profile, details, callback) {
         });
       }
     } else {
-      callback(null, null);
+      callback(err, null);
     }
   });
 }
 
 function store_cape(rid, userId, profile, details, callback) {
-  networking.get_cape_url(rid, userId, profile, function(url) {
+  networking.get_cape_url(rid, userId, profile, function(err, url) {
-    if (url) {
+    if (!err && url) {
       var cape_hash = get_hash(url);
       if (details && details.cape === cape_hash) {
-        cache.update_timestamp(rid, userId, cape_hash, function(err) {
+        cache.update_timestamp(rid, userId, cape_hash, false, function(err) {
           callback(err, cape_hash);
         });
       } else {
@@ -91,7 +91,7 @@ function store_cape(rid, userId, profile, details, callback) {
         });
       }
     } else {
-      callback(null, null);
+      callback(err, null);
     }
   });
 }
@@ -155,20 +155,30 @@ function store_images(rid, userId, details, type, callback) {
             callback_for(userId, "cape", cache_err, null);
           });
         } else {
-          // an error occured, not caching
+          // an error occured, not caching. we can try in 60 seconds
           callback_for(userId, type, err, null);
         }
       } else {
-        // no error and we have a profile or it's not a uuid
+        // no error and we have a profile (if it's a uuid)
         store_skin(rid, userId, profile, details, function(err, skin_hash) {
+          if (err && !skin_hash) {
+            // an error occured, not caching. we can try in 60 seconds
+            callback_for(userId, "skin", err, null);
+          } else {
             cache.save_hash(rid, userId, skin_hash, null, function(cache_err) {
               callback_for(userId, "skin", (err || cache_err), skin_hash);
+            });
+          }
+        });
         store_cape(rid, userId, profile, details, function(err, cape_hash) {
-              cache.save_hash(rid, userId, skin_hash, cape_hash, function(cache_err) {
+          if (err && !cape_hash) {
+            // an error occured, not caching. we can try in 60 seconds
+            callback_for(userId, "cape", (err || cache_err), cape_hash);
+          } else {
+            cache.save_hash(rid, userId, undefined, cape_hash, function(cache_err) {
               callback_for(userId, "cape", (err || cache_err), cape_hash);
             });
-            });
+          }
-          });
         });
       }
     });
@@ -215,7 +225,9 @@ exp.get_image_hash = function(rid, userId, type, callback) {
           if (err) {
             // we might have a cached hash although an error occured
             // (e.g. Mojang servers not reachable, using outdated hash)
-            callback(err, -1, details && cached_hash);
+            cache.update_timestamp(rid, userId, cached_hash, true, function(err2) {
+              callback(err2 || err, -1, details && cached_hash);
+            });
           } else {
             var status = details && (cached_hash === new_hash) ? 3 : 2;
             logging.debug(rid + "cached hash: " + (details && cached_hash));

modules/networking.js

@@ -54,15 +54,18 @@ exp.get_from_options = function(rid, url, options, callback) {
     encoding: (options.encoding || null),
   }, function(error, response, body) {
     // log url + code + description
-    var code = response.statusCode;
+    var code = response && response.statusCode;
-    logfunc = code && code < 405 ? logging.log : logging.warn;
+    if (!error) {
+      var logfunc = code && code < 405 ? logging.log : logging.warn;
       logfunc(rid + url + " " + code + " " + http_code[code]);
+    }
 
     // 200 or 301 depending on content type
     if (!error && (code === 200 || code === 301)) {
       // response received successfully
       callback(body, response, null);
     } else if (error) {
+      logging.error(error);
       callback(body || null, response, error);
     } else if (code === 404 || code === 204) {
       // page does not exist
@@ -126,16 +129,16 @@ exp.get_profile = function(rid, uuid, callback) {
 // get the skin URL for +userId+
 // +profile+ is used if +userId+ is a uuid
 exp.get_skin_url = function(rid, userId, profile, callback) {
-  get_url(rid, userId, profile, 0, function(url) {
+  get_url(rid, userId, profile, 0, function(err, url) {
-    callback(url);
+    callback(err, url);
   });
 };
 
 // get the cape URL for +userId+
 // +profile+ is used if +userId+ is a uuid
 exp.get_cape_url = function(rid, userId, profile, callback) {
-  get_url(rid, userId, profile, 1, function(url) {
+  get_url(rid, userId, profile, 1, function(err, url) {
-    callback(url);
+    callback(err, url);
   });
 };
 
@@ -143,11 +146,11 @@ function get_url(rid, userId, profile, type, callback) {
   if (userId.length <= 16) {
     //username
     exp.get_username_url(rid, userId, type, function(err, url) {
-      callback(url || null);
+      callback(err, url || null);
     });
   } else {
     exp.get_uuid_url(profile, type, function(url) {
-      callback(url || null);
+      callback(null, url || null);
     });
   }
 }

test/test.js

@@ -15,7 +15,7 @@ var request = require("request");
 config.http_timeout *= 3;
 
 // no spam
-logging.log = function() {};
+//logging.log = function() {};
 
 var uuids = fs.readFileSync("test/uuids.txt").toString().split(/\r?\n/);
 var names = fs.readFileSync("test/usernames.txt").toString().split(/\r?\n/);
@@ -166,7 +166,7 @@ describe("Crafatar", function() {
     });
     it("should ignore file updates on invalid files", function(done) {
       assert.doesNotThrow(function() {
-        cache.update_timestamp(rid, "0123456789abcdef0123456789abcdef", "invalid-file.png", function(err) {
+        cache.update_timestamp(rid, "0123456789abcdef0123456789abcdef", "invalid-file.png", false, function(err) {
           done();
         });
       });