mirror of
https://github.com/systemed/tilemaker
synced 2025-02-21 13:24:09 +01:00
d75f6d8218
Rack::Handler is extracted to gem "rackup" from v3 ref: https://github.com/rack/rack/blob/main/CHANGELOG.md#removed Co-authored-by: Hsieh Chin Fan <pham@topo.tw>
120 lines
3.4 KiB
Ruby
Executable file
120 lines
3.4 KiB
Ruby
Executable file
#!/usr/bin/ruby
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# Vector tile server
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#
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# This serves individual .pbf tiles from an .mbtiles file, plus
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# any static files in the static/ directory. Use it for testing tilemaker output
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# with a renderer such as Mapbox GL. (Your .mbtiles should be
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# created with compression enabled.)
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#
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# Standalone syntax:
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# ruby server.rb path_to.mbtiles
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#
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# It can also be run under Phusion Passenger.
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require 'sqlite3'
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require 'cgi'
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require 'json'
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begin; require 'glug' # Optional glug dependency
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rescue LoadError; end # |
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class MapServer
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CONTENT_TYPES = {
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json: "application/json",
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png: "image/png",
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pbf: "application/octet-stream",
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css: "text/css",
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js: "application/javascript"
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}
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EMPTY_TILE = ["1F8B0800FA78185E000393E2E3628F8F4FCD2D28A9D46850A86002006471443610000000"].pack('H*')
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EMPTY_FONT = ["0A1F0A124D6574726F706F6C697320526567756C61721209313533362D31373931"].pack('H*')
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def initialize(mbtiles, max_age=604800)
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@@mbtiles = mbtiles
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@@max_age = max_age
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MapServer.connect
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end
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def self.connect
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@@db = SQLite3::Database.new(@@mbtiles)
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Dir.chdir("static") unless Dir.pwd.include?("static")
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self
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end
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def read_metadata
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md = {}
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@@db.execute("SELECT name,value FROM metadata").each do |row|
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k,v = row
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md[k] = k=='json' ? JSON.parse(v) : v
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end
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md
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end
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def call(env)
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path = CGI.unescape( (env['REQUEST_PATH'] || env['REQUEST_URI']).sub(/^\//,'') )
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if path.empty? then path='index.html' end
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if path =~ %r!^/?(\d+)/(\d+)/(\d+).*\.pbf!
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# Serve .pbf tile from mbtiles
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z,x,y = $1.to_i, $2.to_i, $3.to_i
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tms_y = 2**z - y - 1
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res = @@db.execute("SELECT tile_data FROM tiles WHERE zoom_level=? AND tile_column=? AND tile_row=?", [z, x, tms_y])
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blob = res.length==0 ? EMPTY_TILE : res[0][0]
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['200', {
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'Content-Type' => 'application/x-protobuf',
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'Content-Encoding'=> 'gzip',
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'Content-Length' => blob.bytesize.to_s,
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'Cache-Control' => "max-age=#{@@max_age}",
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'Access-Control-Allow-Origin' => '*'
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}, [blob]]
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elsif path=='metadata'
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# Serve mbtiles metadata
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['200', {'Content-Type' => 'application/json', 'Cache-Control' => "max-age=#{@@max_age}", 'Access-Control-Allow-Origin' => '*' }, [read_metadata.to_json]]
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# elsif ARGV.include?(path.sub(/\.json$/,'.glug'))
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# # Convert .glug style to .json
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# # ****** fixme
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# glug = Glug::Stylesheet.new { instance_eval(File.read( path.sub(/\.json$/,'.glug') )) }.to_json
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# ['200', {'Content-Type' => 'application/json' }, [glug] ]
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elsif File.exist?(path)
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# Serve static file
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ct = path.match(/\.(\w+)$/) ? (CONTENT_TYPES[$1.to_sym] || 'text/html') : 'text/html'
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['200', {'Content-Type' => ct, 'Cache-Control' => "max-age=#{@@max_age}", 'Access-Control-Allow-Origin' => '*'}, [File.read(path)]]
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elsif path=~/font.+\.pbf/
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# Font not found so send dummy file
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['200', {
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'Content-Type' => 'application/x-protobuf',
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'Content-Length' => EMPTY_FONT.bytesize.to_s,
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'Access-Control-Allow-Origin' => '*'
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}, [EMPTY_FONT]]
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else
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# Not found
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puts "Couldn't find #{path}"
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['404', {'Content-Type' => 'text/html'}, ["Resource at #{path} not found"]]
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end
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end
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# Start server
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if defined?(PhusionPassenger)
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puts "Starting Passenger server"
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PhusionPassenger.on_event(:starting_worker_process) do |forked|
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if forked then MapServer.connect end
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end
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else
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puts "Starting local server"
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require 'rackup'
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server = MapServer.new(ARGV[0],0)
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app = Proc.new { |env| server.call(env) }
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Rackup::Handler::WEBrick.run(app)
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end
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end
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