769 lines
27 KiB
JavaScript
769 lines
27 KiB
JavaScript
var _ = require('underscore')
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, Step = require('step')
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, cartoData = require('cartodb-redis')(global.environment.redis)
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, Cache = require('./cache_validator')
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, mapnik = require('mapnik')
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, crypto = require('crypto')
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, request = require('request')
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, LZMA = require('lzma/lzma_worker.js').LZMA
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;
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// This is for backward compatibility with 1.3.3
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if ( _.isUndefined(global.environment.sqlapi.domain) ) {
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// Only use "host" as "domain" if it contains alphanumeric characters
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var host = global.environment.sqlapi.host;
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if ( host && host.match(/[a-zA-Z]/) ) {
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global.environment.sqlapi.domain = host;
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}
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}
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module.exports = function(){
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var rendererConfig = _.defaults(global.environment.renderer || {}, {
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cache_ttl: 60000, // milliseconds
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metatile: 4,
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bufferSize: 64
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});
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var me = {
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// This is for inline maps and table maps
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base_url: global.environment.base_url_legacy || '/tiles/:table',
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/// @deprecated with Windshaft-0.17.0
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///base_url_notable: '/tiles',
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// This is for Detached maps
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//
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// "maps" is the official, while
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// "tiles/layergroup" is for backward compatibility up to 1.6.x
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//
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base_url_mapconfig: global.environment.base_url_detached || '(?:/maps|/tiles/layergroup)',
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grainstore: {
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map: {
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// TODO: allow to specify in configuration
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srid: 3857
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},
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datasource: global.environment.postgres,
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cachedir: global.environment.millstone.cache_basedir,
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mapnik_version: global.environment.mapnik_version || mapnik.versions.mapnik,
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default_layergroup_ttl: 7200, // seconds (default is 300)
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gc_prob: 0.01 // default is 0.01 TODO: make configurable via env config
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},
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mapnik: {
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metatile: rendererConfig.metatile,
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bufferSize: rendererConfig.bufferSize
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},
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statsd: global.environment.statsd,
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renderCache: {
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ttl: rendererConfig.cache_ttl
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},
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redis: global.environment.redis,
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enable_cors: global.environment.enable_cors,
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varnish_host: global.environment.varnish.host,
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varnish_port: global.environment.varnish.port,
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varnish_secret: global.environment.varnish.secret,
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cache_enabled: global.environment.cache_enabled,
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log_format: global.environment.log_format,
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useProfiler: global.environment.useProfiler
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};
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// Be nice and warn if configured mapnik version
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// is != instaled mapnik version
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if ( mapnik.versions.mapnik != me.grainstore.mapnik_version ) {
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console.warn("WARNING: detected mapnik version ("
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+ mapnik.versions.mapnik + ") != configured mapnik version ("
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+ me.grainstore.mapnik_version + ")");
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}
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/* This whole block is about generating X-Cache-Channel { */
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// TODO: review lifetime of elements of this cache
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// NOTE: by-token indices should only be dropped when
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// the corresponding layegroup is dropped, because
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// we have no SQL after layer creation.
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me.channelCache = {};
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// Run a query through the SQL api
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me.sqlQuery = function (username, api_key, sql, callback) {
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var api = global.environment.sqlapi;
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// build up api string
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var sqlapihostname = username;
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if ( api.domain ) sqlapihostname += '.' + api.domain;
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var sqlapi = api.protocol + '://';
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if ( api.host && api.host != api.domain ) sqlapi += api.host;
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else sqlapi += sqlapihostname;
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sqlapi += ':' + api.port + '/api/' + api.version + '/sql';
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var qs = { q: sql }
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// add api_key if given
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if (_.isString(api_key) && api_key != '') { qs.api_key = api_key; }
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// call sql api
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//
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// NOTE: using POST to avoid size limits:
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// Seehttp://github.com/CartoDB/Windshaft-cartodb/issues/111
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//
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// TODO: use "host" header to allow IP based specification
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// of sqlapi address (and avoid a DNS lookup)
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//
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request.post({
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url:sqlapi, body:qs, json:true,
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headers:{host: sqlapihostname}
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}, function(err, res, body)
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{
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if (err){
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console.log('ERROR connecting to SQL API on ' + sqlapi + ': ' + err);
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callback(err);
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return;
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}
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if (res.statusCode != 200) {
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var msg = res.body.error ? res.body.error : res.body;
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callback(new Error(msg));
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console.log('unexpected response status (' + res.statusCode + ') for sql query: ' + sql + ': ' + msg);
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return;
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}
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callback(null, body.rows);
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});
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};
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//
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// Invoke callback with number of milliseconds since
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// last update in any of the given tables
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//
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me.findLastUpdated = function (username, api_key, tableNames, callback) {
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var sql = 'SELECT EXTRACT(EPOCH FROM max(updated_at)) as max FROM CDB_TableMetadata m WHERE m.tabname::name = any (\'{'
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+ tableNames.join(',') + '}\')';
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// call sql api
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me.sqlQuery(username, api_key, sql, function(err, rows){
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if (err){
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var msg = err.message ? err.message : err;
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callback(new Error('could not find last updated timestamp: ' + msg));
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return;
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}
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// when the table has not updated_at means it hasn't been changed so a default last_updated is set
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var last_updated = 0;
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if(rows.length !== 0) {
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last_updated = rows[0].max || 0;
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}
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callback(null, last_updated*1000);
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});
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};
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me.affectedTables = function (username, api_key, sql, callback) {
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// Replace mapnik tokens
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sql = sql.replace(RegExp('!bbox!', 'g'), 'ST_MakeEnvelope(0,0,0,0)')
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.replace(RegExp('!pixel_width!', 'g'), '1')
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.replace(RegExp('!pixel_height!', 'g'), '1')
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;
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// Pass to CDB_QueryTables
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sql = 'SELECT CDB_QueryTables($windshaft$' + sql + '$windshaft$)';
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// call sql api
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me.sqlQuery(username, api_key, sql, function(err, rows){
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if (err){
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var msg = err.message ? err.message : err;
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callback(new Error('could not fetch source tables: ' + msg));
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return;
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}
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var qtables = rows[0].cdb_querytables;
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var tableNames = qtables.split(/^\{(.*)\}$/)[1];
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tableNames = tableNames.split(',');
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callback(null, tableNames);
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});
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};
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me.buildCacheChannel = function (dbName, tableNames){
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return dbName + ':' + tableNames.join(',');
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};
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me.generateMD5 = function(data){
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var hash = crypto.createHash('md5');
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hash.update(data);
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return hash.digest('hex');
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}
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me.generateCacheChannel = function(req, callback){
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// use key to call sql api with sql request if present, else
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// just return dbname and table name base key
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var dbName = req.params.dbname;
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var cacheKey = [ dbName ];
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if ( req.params.token ) cacheKey.push(req.params.token);
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else if ( req.params.sql ) cacheKey.push( me.generateMD5(req.params.sql) );
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cacheKey = cacheKey.join(':');
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if ( me.channelCache.hasOwnProperty(cacheKey) ) {
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callback(null, me.channelCache[cacheKey]);
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return;
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}
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else if ( req.params.token ) {
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// cached cache channel for token-based access should be constructed
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// at cache creation time
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callback(new Error('missing channel cache for token ' + req.params.token));
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return;
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}
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if ( ! req.params.sql && ! req.params.token ) {
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var cacheChannel = me.buildCacheChannel(dbName, [req.params.table]);
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// not worth caching this
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callback(null, cacheChannel);
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return;
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}
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if ( ! req.params.sql ) {
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callback(new Error("this request doesn't need an X-Cache-Channel generated"));
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return;
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}
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var dbName = req.params.dbname;
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var username = this.userByReq(req);
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// strip out windshaft/mapnik inserted sql if present
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var sql = req.params.sql.match(/^\((.*)\)\sas\scdbq$/);
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sql = (sql != null) ? sql[1] : req.params.sql;
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me.affectedTables(username, req.params.map_key, sql, function(err, tableNames) {
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if ( err ) { callback(err); return; }
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var cacheChannel = me.buildCacheChannel(dbName,tableNames);
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me.channelCache[cacheKey] = cacheChannel; // store for caching
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callback(null, cacheChannel);
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});
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};
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// Set the cache chanel info to invalidate the cache on the frontend server
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//
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// @param req The request object.
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// The function will have no effect unless req.res exists.
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// It is expected that req.params contains 'table' and 'dbname'
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//
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// @param cb function(err, channel) will be called when ready.
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// the channel parameter will be null if nothing was added
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//
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me.addCacheChannel = function(req, cb) {
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// skip non-GET requests, or requests for which there's no response
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if ( req.method != 'GET' || ! req.res ) { cb(null, null); return; }
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var res = req.res;
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var cache_policy = req.query.cache_policy;
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if ( req.params.token ) cache_policy = 'persist';
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if ( cache_policy == 'persist' ) {
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res.header('Cache-Control', 'public,max-age=31536000'); // 1 year
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} else {
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var ttl = global.environment.varnish.ttl || 86400;
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res.header('Cache-Control', 'no-cache,max-age='+ttl+',must-revalidate, public');
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}
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// Set Last-Modified header
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var lastUpdated;
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if ( req.params.cache_buster ) {
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// Assuming cache_buster is a timestamp
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// FIXME: store lastModified in the cache channel instead
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lastUpdated = new Date(parseInt(req.params.cache_buster));
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} else {
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lastUpdated = new Date();
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}
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res.header('Last-Modified', lastUpdated.toUTCString());
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me.generateCacheChannel(req, function(err, channel){
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if ( ! err ) {
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res.header('X-Cache-Channel', channel);
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cb(null, channel);
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} else {
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console.log('ERROR generating cache channel: ' + ( err.message ? err.message : err ));
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// TODO: evaluate if we should bubble up the error instead
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cb(null, 'ERROR');
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}
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});
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};
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me.afterLayergroupCreate = function(req, mapconfig, response, callback) {
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var token = response.layergroupid;
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var username = this.userByReq(req);
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var tasksleft = 2; // redis key and affectedTables
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var errors = [];
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var done = function(err) {
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if ( err ) {
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errors.push('' + err);
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}
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if ( ! --tasksleft ) {
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err = errors.length ? new Error(errors.join('\n')) : null;
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callback(err);
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}
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}
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// Don't wait for the mapview count increment to
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// take place before proceeding. Error will be logged
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// asyncronously
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cartoData.incMapviewCount(username, mapconfig.stat_tag, function(err) {
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if (req.profiler) req.profiler.done('incMapviewCount');
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if ( err ) console.log("ERROR: failed to increment mapview count for user '" + username + "': " + err);
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done();
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});
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var sql = [];
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_.each(mapconfig.layers, function(lyr) {
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sql.push(lyr.options.sql);
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});
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sql = sql.join(';');
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var dbName = req.params.dbname;
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var usr = this.userByReq(req);
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var key = req.params.map_key || req.params.api_key;
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var cacheKey = dbName + ':' + token;
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me.affectedTables(usr, key, sql, function(err, tableNames) {
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if (req.profiler) req.profiler.done('affectedTables');
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if ( err ) { done(err); return; }
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var cacheChannel = me.buildCacheChannel(dbName,tableNames);
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me.channelCache[cacheKey] = cacheChannel; // store for caching
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// find last updated
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me.findLastUpdated(usr, key, tableNames, function(err, lastUpdated) {
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if (req.profiler) req.profiler.done('findLastUpdated');
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if ( err ) { done(err); return; }
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response.layergroupid = response.layergroupid + ':' + lastUpdated; // use epoch
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response.last_updated = new Date(lastUpdated).toISOString(); // TODO: use ISO format
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done(null);
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});
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});
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};
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/* X-Cache-Channel generation } */
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me.re_userFromHost = new RegExp(
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global.environment.user_from_host ||
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'^([^\\.]+)\\.' // would extract "strk" from "strk.cartodb.com"
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);
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me.userByReq = function(req) {
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var host = req.headers.host;
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var mat = host.match(this.re_userFromHost);
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if ( ! mat ) {
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console.error("ERROR: user pattern '" + this.re_userFromHost
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+ "' does not match hostname '" + host + "'");
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return;
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}
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// console.log("Matches: "); console.dir(mat);
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if ( ! mat.length === 2 ) {
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console.error("ERROR: pattern '" + this.re_userFromHost
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+ "' gave unexpected matches against '" + host + "': " + mat);
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return;
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}
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return mat[1];
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}
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// Set db authentication parameters to those of the given username
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//
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// @param username the cartodb username, mapped to a database username
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// via CartodbRedis metadata records
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//
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// @param params the parameters to set auth options into
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// added params are: "dbuser" and "dbpassword"
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//
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// @param callback function(err)
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//
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me.setDBAuth = function(username, params, callback) {
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var user_params = {};
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var auth_user = global.environment.postgres_auth_user;
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var auth_pass = global.environment.postgres_auth_pass;
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Step(
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function getId() {
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cartoData.getUserId(username, this);
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},
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function(err, user_id) {
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if (err) throw err;
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user_params['user_id'] = user_id;
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var dbuser = _.template(auth_user, user_params);
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_.extend(params, {dbuser:dbuser});
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// skip looking up user_password if postgres_auth_pass
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// doesn't contain the "user_password" label
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if (!auth_pass || ! auth_pass.match(/\buser_password\b/) ) return null;
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cartoData.getUserDBPass(username, this);
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},
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function(err, user_password) {
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if (err) throw err;
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user_params['user_password'] = user_password;
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if ( auth_pass ) {
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var dbpass = _.template(auth_pass, user_params);
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_.extend(params, {dbpassword:dbpass});
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}
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return true;
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},
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function finish(err) {
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callback(err);
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}
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);
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};
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// Set db connection parameters to those for the given username
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//
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// @param dbowner cartodb username of database owner,
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// mapped to a database username
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// via CartodbRedis metadata records
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//
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// @param params the parameters to set connection options into
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// added params are: "dbname", "dbhost"
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//
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// @param callback function(err)
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//
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me.setDBConn = function(dbowner, params, callback) {
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Step(
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function getDatabaseHost(){
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cartoData.getUserDBHost(dbowner, this);
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},
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function getDatabase(err, data){
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if(err) throw err;
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if ( data ) _.extend(params, {dbhost:data});
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cartoData.getUserDBName(dbowner, this);
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},
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function extendParams(err, data){
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if (err) throw err;
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if ( data ) _.extend(params, {dbname:data});
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return null;
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},
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function finish(err) {
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callback(err);
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}
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);
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};
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|
|
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// Check if a request is authorized by a signer
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//
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// Any existing signature for the given request will verified
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// for authorization to this specific request (may require auth_token)
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// See https://github.com/CartoDB/Windshaft-cartodb/wiki/Signed-maps
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//
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// @param req express request object
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// @param callback function(err, signed_by) signed_by will be
|
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// null if the request is not signed by anyone
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// or will be a string cartodb username otherwise.
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//
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me.authorizedBySigner = function(req, callback)
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{
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if ( ! req.params.token || ! req.params.signer ) {
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//console.log("No signature provided"); // debugging
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callback(null, null); // no signer requested
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return;
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}
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var signer = req.params.signer;
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var layergroup_id = req.params.token;
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var auth_token = req.params.auth_token;
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//console.log("Checking authorization from signer " + signer + " for resource " + layergroup_id + " with auth_token " + auth_token);
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me.signedMaps.isAuthorized(signer, layergroup_id, auth_token,
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function(err, authorized) {
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callback(err, authorized ? signer : null);
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});
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};
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// Check if a request is authorized by api_key
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//
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// @param req express request object
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// @param callback function(err, authorized)
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//
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me.authorizedByAPIKey = function(req, callback)
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{
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var user = me.userByReq(req);
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Step(
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function (){
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cartoData.getUserMapKey(user, this);
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},
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function checkApiKey(err, val){
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if (err) throw err;
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var valid = 0;
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if ( val ) {
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if ( val == req.query.map_key ) valid = 1;
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else if ( val == req.query.api_key ) valid = 1;
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// check also in request body
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else if ( req.body && req.body.map_key && val == req.body.map_key ) valid = 1;
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else if ( req.body && req.body.api_key && val == req.body.api_key ) valid = 1;
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}
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return valid;
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},
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function finish(err, authorized) {
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callback(err, authorized);
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}
|
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);
|
|
};
|
|
|
|
/**
|
|
* Check access authorization
|
|
*
|
|
* @param req - standard req object. Importantly contains table and host information
|
|
* @param callback function(err, allowed) is access allowed not?
|
|
*/
|
|
me.authorize = function(req, callback) {
|
|
var that = this;
|
|
var user = me.userByReq(req);
|
|
|
|
Step(
|
|
function (){
|
|
that.authorizedByAPIKey(req, this);
|
|
},
|
|
function checkApiKey(err, authorized){
|
|
if (err) throw err;
|
|
|
|
// if not authorized by api_key, continue
|
|
if (authorized !== 1) {
|
|
// not authorized by api_key,
|
|
// check if authorized by signer
|
|
that.authorizedBySigner(req, this);
|
|
return;
|
|
}
|
|
|
|
_.extend(req.params, { _authorizedByApiKey: true });
|
|
|
|
// authorized by api key, login as the given username and stop
|
|
that.setDBAuth(user, req.params, function(err) {
|
|
callback(err, true); // authorized (or error)
|
|
});
|
|
},
|
|
function checkSignAuthorized(err, signed_by){
|
|
if (err) throw err;
|
|
|
|
if ( ! signed_by ) {
|
|
// request not authorized by signer, continue
|
|
// to check map privacy
|
|
return null;
|
|
}
|
|
|
|
// Authorized by "signed_by" !
|
|
that.setDBAuth(signed_by, req.params, function(err) {
|
|
callback(err, true); // authorized (or error)
|
|
});
|
|
},
|
|
function getDatabase(err){
|
|
if (err) throw err;
|
|
// NOTE: only used to get to table privacy
|
|
cartoData.getUserDBName(user, this);
|
|
},
|
|
function getPrivacy(err, dbname){
|
|
if (err) throw err;
|
|
cartoData.getTablePrivacy(dbname, req.params.table, this);
|
|
},
|
|
function(err, privacy){
|
|
callback(err, privacy);
|
|
}
|
|
);
|
|
};
|
|
|
|
/**
|
|
* Whitelist input and get database name & default geometry type from
|
|
* subdomain/user metadata held in CartoDB Redis
|
|
* @param req - standard express request obj. Should have host & table
|
|
* @param callback
|
|
*/
|
|
me.req2params = function(req, callback){
|
|
|
|
if ( req.query.lzma ) {
|
|
|
|
// TODO: check ?
|
|
//console.log("type of req.query.lzma is " + typeof(req.query.lzma));
|
|
|
|
// Decode (from base64)
|
|
var lzma = (new Buffer(req.query.lzma, 'base64').toString('binary')).split('').map(function(c) { return c.charCodeAt(0) - 128 })
|
|
|
|
// Decompress
|
|
LZMA.decompress(
|
|
lzma,
|
|
function(result) {
|
|
if (req.profiler) req.profiler.done('LZMA decompress');
|
|
try {
|
|
delete req.query.lzma
|
|
_.extend(req.query, JSON.parse(result))
|
|
me.req2params(req, callback);
|
|
} catch (err) {
|
|
callback(new Error('Error parsing lzma as JSON: ' + err));
|
|
}
|
|
},
|
|
function(percent) { // progress
|
|
//console.log("LZMA decompression " + percent + "%");
|
|
}
|
|
);
|
|
return;
|
|
}
|
|
|
|
// Whitelist query parameters and attach format
|
|
var good_query = ['sql', 'geom_type', 'cache_buster', 'cache_policy', 'callback', 'interactivity', 'map_key', 'api_key', 'auth_token', 'style', 'style_version', 'style_convert', 'config' ];
|
|
var bad_query = _.difference(_.keys(req.query), good_query);
|
|
|
|
_.each(bad_query, function(key){ delete req.query[key]; });
|
|
req.params = _.extend({}, req.params); // shuffle things as request is a strange array/object
|
|
|
|
if ( req.params.token ) {
|
|
//console.log("Request parameters include token " + req.params.token);
|
|
var tksplit = req.params.token.split(':');
|
|
req.params.token = tksplit[0];
|
|
if ( tksplit.length > 1 ) req.params.cache_buster= tksplit[1];
|
|
tksplit = req.params.token.split('@');
|
|
if ( tksplit.length > 1 ) {
|
|
req.params.signer = tksplit.shift();
|
|
if ( ! req.params.signer ) req.params.signer = this.userByReq(req);
|
|
if ( tksplit.length > 1 ) {
|
|
var template_hash = tksplit.shift(); // unused
|
|
}
|
|
req.params.token = tksplit.shift();
|
|
//console.log("Request for token " + req.params.token + " with signature from " + req.params.signer);
|
|
}
|
|
}
|
|
|
|
// bring all query values onto req.params object
|
|
_.extend(req.params, req.query);
|
|
|
|
// for cartodb, ensure interactivity is cartodb_id or user specified
|
|
req.params.interactivity = req.params.interactivity || 'cartodb_id';
|
|
|
|
var that = this;
|
|
|
|
if (req.profiler) req.profiler.done('req2params.setup');
|
|
|
|
var user = me.userByReq(req);
|
|
|
|
Step(
|
|
function getPrivacy(){
|
|
me.authorize(req, this);
|
|
},
|
|
function gatekeep(err, data){
|
|
if (req.profiler) req.profiler.done('authorize');
|
|
if(err) throw err;
|
|
if(data === "0") throw new Error("Sorry, you are unauthorized (permission denied)");
|
|
return data;
|
|
},
|
|
function getDatabase(err, data){
|
|
if(err) throw err;
|
|
that.setDBConn(user, req.params, this);
|
|
},
|
|
function getGeometryType(err){
|
|
if (req.profiler) req.profiler.done('setDBConn');
|
|
if (err) throw err;
|
|
cartoData.getTableGeometryType(req.params.dbname, req.params.table, this);
|
|
},
|
|
function finishSetup(err, data){
|
|
if (req.profiler) req.profiler.done('cartoData.getTableGeometryType');
|
|
if ( err ) { callback(err, req); return; }
|
|
|
|
if (!_.isNull(data))
|
|
_.extend(req.params, {geom_type: data});
|
|
|
|
// Add default database connection parameters
|
|
// if none given
|
|
_.defaults(req.params, {
|
|
dbuser: global.environment.postgres.user,
|
|
dbpassword: global.environment.postgres.password,
|
|
dbhost: global.environment.postgres.host,
|
|
dbport: global.environment.postgres.port
|
|
});
|
|
|
|
that.addCacheChannel(req, function(err) {
|
|
if (req.profiler) req.profiler.done('addCacheChannel');
|
|
callback(err, req);
|
|
});
|
|
}
|
|
);
|
|
};
|
|
|
|
/**
|
|
* Little helper method to get the current list of infowindow variables and return to client
|
|
* @param req
|
|
* @param callback
|
|
*/
|
|
me.getInfowindow = function(req, callback){
|
|
var that = this;
|
|
var user = me.userByReq(req);
|
|
|
|
Step(
|
|
function(){
|
|
// TODO: if this step really needed ?
|
|
that.req2params(req, this);
|
|
},
|
|
function getDatabase(err){
|
|
if (err) throw err;
|
|
cartoData.getUserDBName(user, this);
|
|
},
|
|
function getInfowindow(err, dbname){
|
|
if (err) throw err;
|
|
cartoData.getTableInfowindow(dbname, req.params.table, this);
|
|
},
|
|
function(err, data){
|
|
callback(err, data);
|
|
}
|
|
);
|
|
};
|
|
|
|
/**
|
|
* Little helper method to get map metadata and return to client
|
|
* @param req
|
|
* @param callback
|
|
*/
|
|
me.getMapMetadata = function(req, callback){
|
|
var that = this;
|
|
var user = me.userByReq(req);
|
|
|
|
Step(
|
|
function(){
|
|
// TODO: if this step really needed ?
|
|
that.req2params(req, this);
|
|
},
|
|
function getDatabase(err){
|
|
if (err) throw err;
|
|
cartoData.getUserDBName(user, this);
|
|
},
|
|
function getMapMetadata(err, dbname){
|
|
if (err) throw err;
|
|
cartoData.getTableMapMetadata(dbname, req.params.table, this);
|
|
},
|
|
function(err, data){
|
|
callback(err, data);
|
|
}
|
|
);
|
|
};
|
|
|
|
/**
|
|
* Helper to clear out tile cache on request
|
|
* @param req
|
|
* @param callback
|
|
*/
|
|
me.flushCache = function(req, Cache, callback){
|
|
var that = this;
|
|
|
|
Step(
|
|
function getParams(){
|
|
// this is mostly to compute req.params.dbname
|
|
that.req2params(req, this);
|
|
},
|
|
function flushInternalCache(err){
|
|
// TODO: implement this, see
|
|
// http://github.com/Vizzuality/Windshaft-cartodb/issues/73
|
|
return true;
|
|
},
|
|
function flushVarnishCache(err){
|
|
if (err) { callback(err); return; }
|
|
if(Cache) {
|
|
Cache.invalidate_db(req.params.dbname, req.params.table);
|
|
}
|
|
callback(null, true);
|
|
}
|
|
);
|
|
};
|
|
|
|
return me;
|
|
}();
|