mirror of
https://github.com/azures04/crafatar.git
synced 2026-03-21 23:41:18 +01:00
split code into more modules, fixes #8
This commit is contained in:
jomo
parent
e2348bbb9d
commit
cc159d3620
8
modules/config.js
Normal file
8
modules/config.js
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@ -0,0 +1,8 @@
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var config = {
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min_size: 0, // < 0 will (obviously) cause crash
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max_size: 512, // too big values might lead to slow response time or DoS
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default_size: 180, // size to be used when no size given
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browser_cache_time: 3600 // seconds until browser will request image again
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};
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module.exports = config;
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72
modules/helpers.js
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72
modules/helpers.js
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@ -0,0 +1,72 @@
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var networking = require('./networking');
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var config = require('./config');
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var skins = require('./skins');
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var fs = require('fs');
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var valid_uuid = /^[0-9a-f]{32}$/;
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var skins_dir = config.skins_dir;
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var exp = {};
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// exracts the skin url of a +profile+ object
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// returns null when no url found
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exp.skin_url = function(profile) {
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var url = null;
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if (profile && profile.properties) {
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profile.properties.forEach(function(prop) {
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if (prop.name == 'textures') {
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var json = Buffer(prop.value, 'base64').toString();
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var props = JSON.parse(json);
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url = props && props.textures && props.textures.SKIN && props.textures.SKIN.url;
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}
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});
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}
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return url;
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};
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// returns true if the +uuid+ is a valid uuid
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// the uuid may be not exist, however
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exp.uuid_valid = function(uuid) {
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return valid_uuid.test(uuid);
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};
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// handles requests for +uuid+ images with +size+
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//
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// callback is a function with 3 parameters:
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// error, status, image buffer
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//
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// the status gives information about how the image was received
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// -1: profile requested, but it was not found
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// 1: found on disk
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// 2: profile requested/found, skin downloaded from mojang servers
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// 3: profile requested/found, but it has no skin
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exp.get_avatar = function(uuid, size, callback) {
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var filepath = skins_dir + uuid + ".png";
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if (fs.existsSync(filepath)) {
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skins.resize_img(filepath, size, function(result) {
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callback(null, 1, result);
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});
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} else {
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networking.get_profile(uuid, function(err, profile) {
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if (err) {
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callback(err, -1, profile);
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}
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var skinurl = exp.skin_url(profile);
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if (skinurl) {
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networking.skin_file(skinurl, filepath, function() {
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console.log('got skin');
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skins.resize_img(filepath, size, function(result) {
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callback(null, 2, result);
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});
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});
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} else {
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// profile found, but has no skin
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callback(null, 3, null);
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}
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});
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}
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};
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module.exports = exp;
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65
modules/networking.js
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65
modules/networking.js
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@ -0,0 +1,65 @@
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var request = require('request');
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var skins = require('./skins');
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var session_url = "https://sessionserver.mojang.com/session/minecraft/profile/";
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var exp = {};
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exp.get_profile = function(uuid, callback) {
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request.get({
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url: session_url + uuid,
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timeout: 1000 // ms
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}, function (error, response, body) {
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if (!error && response.statusCode == 200) {
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callback(null, JSON.parse(body));
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} else {
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if (error) {
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callback(error, null);
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return;
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} else if (response.statusCode == 204 || response.statusCode == 404) {
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// we get 204 No Content when UUID doesn't exist (including 404 in case they change that)
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} else if (response.statusCode == 429) {
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// Too Many Requests
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console.warn("Too many requests for " + uuid);
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console.warn(body);
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} else {
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console.error("Unknown error:");
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console.error(response);
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console.error(body);
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}
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callback(null, null);
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}
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});
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};
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exp.skin_file = function(url, outname, callback) {
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request.get({
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url: url,
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encoding: null, // encoding must be null so we get a buffer
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timeout: 1000 // ms
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}, function (error, response, body) {
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if (!error && response.statusCode == 200) {
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skins.extract_face(body, outname, function() {
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callback();
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});
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} else {
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if (error) {
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console.error(error);
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} else if (response.statusCode == 404) {
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console.warn("Texture not found: " + url);
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} else if (response.statusCode == 429) {
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// Too Many Requests
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// Never got this, seems like textures aren't limited
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console.warn("Too many requests for " + url);
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console.warn(body);
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} else {
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console.error("Unknown error:");
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console.error(response);
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console.error(body);
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}
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callback(null);
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}
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});
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};
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module.exports = exp;
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32
modules/skins.js
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32
modules/skins.js
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@ -0,0 +1,32 @@
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var lwip = require('lwip');
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var exp = {};
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// extracts the face from an image +buffer+
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// save it to a file called +outname+
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exp.extract_face = function(buffer, outname, callback) {
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lwip.open(buffer, "png", function(err, image) {
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if (err) throw err;
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image.batch()
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.crop(8, 8, 15, 15)
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.writeFile(outname, function(err) {
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if (err) throw err;
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callback();
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});
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});
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};
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// resizes the image file +inname+ to +size+ by +size+ pixels
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// +callback+ is a buffer of the resized image
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exp.resize_img = function(inname, size, callback) {
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lwip.open(inname, function(err, image) {
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if (err) throw err;
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image.batch()
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.resize(size, size, "nearest-neighbor") // nearest-neighbor doesn't blur
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.toBuffer('png', function(err, buffer) {
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callback(buffer);
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});
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});
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};
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module.exports = exp;
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@ -3,7 +3,7 @@
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"version": "0.0.0",
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"private": true,
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"scripts": {
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"start": "node ./bin/www"
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"start": "node server.js"
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},
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"dependencies": {
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"express": "~4.9.0",
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@ -1,78 +1,60 @@
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var express = require('express');
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var router = express.Router();
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var skins = require('../skins');
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var networking = require('../modules/networking');
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var helpers = require('../modules/helpers');
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var router = require('express').Router();
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var config = require('../modules/config');
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var skins = require('../modules/skins');
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var fs = require('fs');
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var valid_uuid = /^[0-9a-f]{32}$/;
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/* GET home page. */
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/* GET avatar request. */
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router.get('/:uuid/:size?', function(req, res) {
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var uuid = req.param('uuid');
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var size = req.param('size') || 180;
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var size = req.param('size') || config.default_size;
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var def = req.query.default;
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var start = new Date();
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// Prevent app from crashing/freezing
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if (size <= 0 || size > 512) size = 180;
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if (valid_uuid.test(uuid)) {
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var filename = uuid + ".png";
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if (fs.existsSync("skins/" + filename)) {
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console.log('found ' + filename);
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skins.resize_img("skins/" + filename, size, function(data) {
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// tell browser to cache image locally for 10 minutes
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var end = new Date() - start;
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res.writeHead(200, {'Content-Type': 'image/png', 'Cache-Control': 'max-age=600, public', 'Response-Time': end, 'Storage-Type': 'local'});
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res.end(data);
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if (size <= config.min_size || size > config.max_size) {
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// "Unprocessable Entity", valid request, but semantically erroneous:
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// https://tools.ietf.org/html/rfc4918#page-78
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res.status(422).send("422 Invalid size");
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return;
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} else if (!helpers.uuid_valid(uuid)) {
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res.status(422).send("422 Invalid UUID");
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return;
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}
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helpers.get_avatar(uuid, size, function(err, status, image) {
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if (err) {
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throw err;
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} else if (status == 1 || status == 2) {
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var time = new Date() - start;
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sendimage(200, time, image);
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} else if (status == 3) {
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handle_404(def);
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}
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});
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function handle_404(def) {
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if (def == "alex" || def == "steve") {
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skins.resize_img("public/images/" + def + ".png", size, function(image) {
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var time = new Date() - start;
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sendimage(404, time, image);
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});
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} else {
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console.log(filename + ' not found, downloading profile..');
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skins.get_profile(uuid, function(profile) {
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var skinurl = skins.skin_url(profile);
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if (skinurl) {
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console.log('got profile, skin url is "' + skinurl + '" downloading..');
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skins.skin_file(skinurl, "skins/" + filename, function() {
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console.log('got skin');
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skins.resize_img("skins/" + filename, size, function(data) {
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// tell browser to cache image locally for 10 minutes
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var end = new Date() - start;
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res.writeHead(200, {
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'Content-Type': 'image/png',
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'Cache-Control': 'max-age=600, public',
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'Response-Time': end,
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'Storage-Type': 'downloaded'
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});
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res.end(data);
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});
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});
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} else {
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console.log('no skin url found');
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switch (def) {
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case "alex":
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skins.resize_img("public/images/alex.png", size, function(data) {
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// tell browser to cache image locally for 10 minutes
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var end = new Date() - start;
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res.writeHead(404, {'Content-Type': 'image/png', 'Cache-Control': 'max-age=600, public', 'Response-Time': end, 'Storage-Type': 'local'});
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res.end(data);
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});
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break;
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case "steve":
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skins.resize_img("public/images/steve.png", size, function(data) {
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// tell browser to cache image locally for 10 minutes
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var end = new Date() - start;
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res.writeHead(404, {'Content-Type': 'image/png', 'Cache-Control': 'max-age=600, public', 'Response-Time': end, 'Storage-Type': 'local'});
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res.end(data);
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});
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break;
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default:
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res.status(404).send('404 Not found');
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break;
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}
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}
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});
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res.status(404).send('404 Not found');
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}
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} else {
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res.status(422) // "Unprocessable Entity", valid request, but semantically erroneous: https://tools.ietf.org/html/rfc4918#page-78
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.send("422 Invalid UUID");
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}
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function sendimage(status, time, image) {
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res.writeHead(status, {
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'Content-Type': 'image/png',
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'Cache-Control': 'max-age=' + config.browser_cache_time + ', public',
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'Response-Time': time,
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'X-Storage-Type': 'local'
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});
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res.end(image);
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}
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});
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module.exports = router;
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@ -1,9 +1,9 @@
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#!/usr/bin/env node
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var debug = require('debug')('crafatar');
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var app = require('../app');
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var app = require('./app');
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app.set('port', process.env.PORT || 3000);
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var server = app.listen(app.get('port'), function() {
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debug('Express server listening on port ' + server.address().port);
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debug('Crafatar server listening on port ' + server.address().port);
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});
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105
skins.js
105
skins.js
@ -1,105 +0,0 @@
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var request = require('request');
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var lwip = require('lwip');
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/*
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* Skin retrieval methods are based on @jomo's CLI Crafatar implementation.
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* https://github.com/jomo/Crafatar
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*/
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function extract_face(buffer, outname, callback) {
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lwip.open(buffer, "png", function(err, image) {
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if (err) {
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console.log('c ' + buffer.length);
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throw err;
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}
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image.batch()
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.crop(8, 8, 15, 15)
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.writeFile(outname, function(err) {
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if (err) throw err;
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callback();
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});
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});
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}
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module.exports = {
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get_profile: function(uuid, callback) {
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request.get({
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url: "https://sessionserver.mojang.com/session/minecraft/profile/" + uuid,
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timeout: 1000 // ms
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}, function (error, response, body) {
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if (!error && response.statusCode == 200) {
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callback(JSON.parse(body));
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} else {
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if (error) {
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console.error(error);
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} else if (response.statusCode == 204 || response.statusCode == 404) {
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// we get 204 No Content when UUID doesn't exist (including 404 in case they change that)
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} else if (response.statusCode == 429) {
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// Too Many Requests
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console.warn("Too many requests for " + uuid);
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console.warn(body);
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} else {
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console.error("Unknown error:");
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console.error(response);
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console.error(body);
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}
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callback(null);
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}
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});
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},
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skin_url: function(profile) {
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var url = null;
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if (profile && profile.properties) {
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profile.properties.forEach(function(prop) {
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if (prop.name == 'textures') {
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var json = Buffer(prop.value, 'base64').toString();
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var props = JSON.parse(json);
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url = props && props.textures && props.textures.SKIN && props.textures.SKIN.url;
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}
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});
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}
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return url;
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},
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skin_file: function(url, outname, callback) {
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request.get({
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url: url,
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encoding: null, // encoding must be null so we get a buffer
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timeout: 1000 // ms
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}, function (error, response, body) {
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if (!error && response.statusCode == 200) {
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extract_face(body, outname, function() {
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callback();
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});
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} else {
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if (error) {
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console.error(error);
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} else if (response.statusCode == 404) {
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console.warn("Texture not found: " + url);
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} else if (response.statusCode == 429) {
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// Too Many Requests
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// Never got this, seems like textures aren't limited
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console.warn("Too many requests for " + url);
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console.warn(body);
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} else {
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console.error("Unknown error:");
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console.error(response);
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console.error(body);
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}
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callback(null);
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}
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});
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},
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resize_img: function(inname, size, callback) {
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lwip.open(inname, function(err, image) {
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if (err) throw err;
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image.batch()
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.resize(size, size, "nearest-neighbor") // nearest-neighbor doesn't blur
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.toBuffer('png', function(err, buffer) {
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callback(buffer);
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});
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});
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}
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};
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