use environment variables for configuration

.gitignore

@@ -1,9 +1,3 @@
 images/*/*.png
 node_modules/
 coverage/
-.DS_Store
-*.log
-*.rdb
-*.sublime-*
-config.js
-lib/public/images/sponsor.png

Dockerfile

@@ -1,8 +1,29 @@
 FROM node:12-alpine
 
+ARG AVATAR_MIN
+ARG AVATAR_MAX
+ARG AVATAR_DEFAULT
+ARG RENDER_MIN
+ARG RENDER_MAX
+ARG RENDER_DEFAULT
+ARG FACE_DIR
+ARG HELM_DIR
+ARG SKIN_DIR
+ARG RENDER_DIR
+ARG CAPE_DIR
+ARG CACHE_LOCAL
+ARG CACHE_BROWSER
+ARG EPHEMERAL_STORAGE
 ARG REDIS_URL
+ARG PORT
+ARG BIND
+ARG EXTERNAL_HTTP_TIMEOUT
 ARG DEBUG
-ARG EPHEMERAL_STORAGE
+ARG LOG_TIME
+ARG SPONSOR_SIDE
+ARG TOP_RIGHT
+
+ENV NODE_ENV production
 
 RUN apk --no-cache --virtual .build-deps add git python build-base
 RUN apk --no-cache --virtual .canvas-deps add cairo-dev pango-dev jpeg-dev giflib-dev
@@ -15,8 +36,7 @@ RUN mkdir -p /crafatar/images/capes
 
 VOLUME /crafatar/images
 
-COPY package.json www.js crafatar/
-COPY config.example.js crafatar/config.js
+COPY package.json www.js config.js crafatar/
 COPY lib/ crafatar/lib/
 
 WORKDIR /crafatar

README.md

@@ -53,17 +53,9 @@ docker run --net crafatar -d --name redis redis
 docker run --net crafatar -v crafatar-images:/crafatar/images -e REDIS_URL=redis://redis -p 3000:3000 crafatar/crafatar
 ```
 
-## Environment variables
+## Configration / Environment variables
 
-| Variable            | Default                  | Description                        |
-| :-                  | :-                       | :-                                 |
-| `BIND`              | `0.0.0.0`                | Hostname to listen on              |
-| `PORT`              | `3000`                   | Port to listen on                  |
-| `DEBUG`             | `false`                  | Enable verbose debug logging       |
-| `REDIS_URL`         | `redis://127.0.0.1:6379` | URI of the redis server            |
-| `EPHEMERAL_STORAGE` |                          | If set, redis is flushed on start* |
-
-\* Use this to avoid issues when you have a persistent redis database but an ephemeral storage
+See the `config.js` file.
 
 # Operational notes
 

config.example.js

@@ -1,40 +0,0 @@
-var config = {
-  avatars: {
-    min_size: 1,                                  // for avatars
-    max_size: 512,                                // for avatars; too big values might lead to slow response time or DoS
-    default_size: 160                             // for avatars; size to be used when no size given
-  },
-  renders: {
-    min_scale: 1,                                 // for 3D rendered skins
-    max_scale: 10,                                // for 3D rendered skins; too big values might lead to slow response time or DoS
-    default_scale: 6                              // for 3D rendered skins; scale to be used when no scale given
-  },
-  cleaner: {
-    interval: 600,                                // interval seconds to check limits
-    disk_limit: 524288,                           // min allowed free KB on disk to trigger image deletion
-    redis_limit: 24576,                           // max allowed used KB on redis to trigger redis flush
-    amount: 50000                                 // amount of skins for which all image types are deleted
-  },
-  directories: {
-    faces: "./images/faces/",                     // directory where faces are kept. must have trailing "/"
-    helms: "./images/helms/",                     // directory where helms are kept. must have trailing "/"
-    skins: "./images/skins/",                     // directory where skins are kept. must have trailing "/"
-    renders: "./images/renders/",                 // directory where rendered skins are kept. must have trailing "/"
-    capes: "./images/capes/"                      // directory where capes are kept. must have trailing "/"
-  },
-  caching: {
-    local: 1200,                                  // seconds until we will check if user's skin changed. should be > 60 to comply with Mojang's rate limit
-    browser: 3600                                 // seconds until browser will request image again
-  },
-  server: {
-    http_timeout: 2000,                           // ms until connection to Mojang is dropped
-    debug_enabled: false,                         // enables logging.debug & editing index page
-    log_time: true                                // set to false if you use an external logger that provides timestamps
-  },
-  sponsor: {
-    sidebar: '<hr><div class="list-group"><a class="list-group-item sponsor-item" href="https://akliz.net/crafatar" target="_blank" title="Applies to all modpacks and plans for the first billing cycle only.">Save 20% on a Minecraft server with Akliz.</a></div>',
-    top_right: '<a href="https://akliz.net/crafatar" target="_blank" title="Crafatar is sponsored by Akliz" class="sponsor"><img src="/images/sponsor.png" alt="Akliz"></a>'
-  },
-};
-
-module.exports = config;

config.js

@@ -0,0 +1,60 @@
+var config = {
+  avatars: {
+    // for avatars
+    min_size: parseInt(process.env.AVATAR_MIN) || 1,
+    // for avatars; large values might lead to slow response time or DoS
+    max_size: parseInt(process.env.AVATAR_MAX) || 512,
+    // for avatars; size to be used when no size given
+    default_size: parseInt(process.env.AVATAR_DEFAULT) ||  160
+  },
+  renders: {
+    // for 3D rendered skins
+    min_scale: parseInt(process.env.RENDER_MIN) || 1,
+    // for 3D rendered skins; large values might lead to slow response time or DoS
+    max_scale: parseInt(process.env.RENDER_MAX) || 10,
+    // for 3D rendered skins; scale to be used when no scale given
+    default_scale: parseInt(process.env.RENDER_DEFAULT) || 6
+  },
+  directories: {
+    // directory where faces are kept. must have trailing "/"
+    faces: process.env.FACE_DIR || "./images/faces/",
+    // directory where helms are kept. must have trailing "/"
+    helms: process.env.HELM_DIR || "./images/helms/",
+    // directory where skins are kept. must have trailing "/"
+    skins: process.env.SKIN_DIR || "./images/skins/",
+    // directory where rendered skins are kept. must have trailing "/"
+    renders: process.env.RENDER_DIR || "./images/renders/",
+    // directory where capes are kept. must have trailing "/"
+    capes: process.env.CAPE_DIR || "./images/capes/"
+  },
+  caching: {
+    // seconds until we will check if user's skin changed.
+    // Should be > 60 to comply with Mojang's rate limit
+    local: parseInt(process.env.CACHE_LOCAL) || 1200,
+    // seconds until browser will request image again
+    browser: parseInt(process.env.CACHE_BROWSER) || 3600,
+    // If true, redis is flushed on start.
+    // Use this to avoid issues when you have a persistent redis database but an ephemeral storage
+    ephemeral: process.env.EPHEMERAL_STORAGE === "true" || false,
+  },
+  // URL of your redis server
+  redis: process.env.REDIS_URL || 'redis://localhost:6379',
+  server: {
+    // port to listen on
+    port: parseInt(process.env.PORT) || 3000,
+    // IP address to listen on
+    bind: process.env.BIND || "0.0.0.0",
+    // ms until connection to Mojang is dropped
+    http_timeout: parseInt(process.env.EXTERNAL_HTTP_TIMEOUT) || 2000,
+    // enables logging.debug & editing index page
+    debug_enabled: process.env.DEBUG === "true" || false,
+    // set to false if you use an external logger that provides timestamps,
+    log_time: process.env.LOG_TIME === "true" || true,
+  },
+  sponsor: {
+    sidebar: process.env.SPONSOR_SIDE,
+    top_right: process.env.SPONSOR_TOP_RIGHT
+  },
+};
+
+module.exports = config;

lib/cache.js

@@ -1,7 +1,6 @@
 var logging = require("./logging");
 var node_redis = require("redis");
 var config = require("../config");
-var url = require("url");
 
 var redis = null;
 
@@ -9,19 +8,10 @@ var redis = null;
 // flushes redis when using ephemeral storage (e.g. Heroku)
 function connect_redis() {
   logging.log("connecting to redis...");
-  // parse redis env
-  var redis_env = process.env.REDISCLOUD_URL || process.env.REDIS_URL;
-  var redis_url = redis_env ? url.parse(redis_env) : {};
-  redis_url.port = redis_url.port || 6379;
-  redis_url.hostname = redis_url.hostname || "localhost";
-  // connect to redis
-  redis = node_redis.createClient(redis_url.port, redis_url.hostname);
-  if (redis_url.auth) {
-    redis.auth(redis_url.auth.split(":")[1]);
-  }
+  redis = node_redis.createClient(config.redis);
   redis.on("ready", function() {
     logging.log("Redis connection established.");
-    if (process.env.EPHEMERAL_STORAGE) {
+    if (config.caching.ephemeral) {
       logging.log("Storage is ephemeral, flushing redis");
       redis.flushall();
     }

lib/logging.js

@@ -32,7 +32,7 @@ exp.warn = function() {
 exp.error = function() {
   log("ERROR", arguments, console.error);
 };
-if (config.server.debug_enabled || process.env.DEBUG === "true") {
+if (config.server.debug_enabled) {
   exp.debug = function() {
     log("DEBUG", arguments);
   };

lib/public/stylesheets/style.css

@@ -35,7 +35,6 @@ a.forkme:hover {
 
 a.sponsor {
   position: fixed;
-  z-index: 1041;
   width: 48px;
   height: 48px;
   right: 0px;
@@ -43,6 +42,11 @@ a.sponsor {
   margin: 5px;
 }
 
+.sponsor img {
+  width: 100%;
+  height: 100%;
+}
+
 a.sponsor-item {
   color: #aa7100 !important;
   font-weight: initial;

lib/server.js

@@ -136,8 +136,8 @@ function requestHandler(req, res) {
 var exp = {};
 
 exp.boot = function(callback) {
-  var port = process.env.PORT || 3000;
-  var bind_ip = process.env.BIND || "0.0.0.0";
+  var port = config.server.port;
+  var bind_ip = config.server.bind;
   server = http.createServer(requestHandler).listen(port, bind_ip, function() {
     logging.log("Server running on http://" + bind_ip + ":" + port + "/");
     if (callback) {
@@ -149,7 +149,7 @@ exp.boot = function(callback) {
   // wait for established connections to finish (30s max),
   // then exit
   process.on("SIGTERM", function() {
-    logging.warn("Got SIGTERM, no longer accepting connections!");
+    logging.warn("Got SIGTERM, no longer accepting new connections!");
 
     setTimeout(function() {
       logging.error("Dropping connections after 30s. Force quit.");

package.json

@@ -25,7 +25,6 @@
     "avatar"
   ],
   "scripts": {
-    "postinstall": "cp 'config.example.js' 'config.js'",
     "start": "node www.js",
     "test": "mocha",
     "test-travis": "istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage"