import cairo
import cgi
-import mapnik2
+import mapnik
import os
import shutil
import sys
os.environ['HTTP_USER_AGENT'] = 'NONE'
# Get the load average
-loadavg = float(open("/proc/loadavg").readline().split(" ")[0])
+cputimes = [float(n) for n in open("/proc/stat").readline().rstrip().split()[1:-1]]
+idletime = cputimes[3] / sum(cputimes)
# Process the request
-if loadavg > 35.0:
- # Abort if the load average on the machine is too high
+if idletime < 0.2:
+ # Abort if the CPU idle time on the machine is too low
print "Status: 503 Service Unavailable"
- output_error("The load average on the server is too high at the moment. Please wait a few minutes before trying again.")
+ output_error("The server is too busy at the moment. Please wait a few minutes before trying again.")
<% @blocks["user_agents"].each do |user_agent| -%>
elif os.environ['HTTP_USER_AGENT'] == '<%= user_agent %>':
# Block scraper
print "Status: 503 Service Unavailable"
- output_error("The load average on the server is too high at the moment. Please wait a few minutes before trying again.")
+ output_error("The server is too busy at the moment. Please wait a few minutes before trying again.")
<% end -%>
elif not form.has_key("bbox"):
# No bounding box specified
output_error("No format specified")
else:
# Create projection object
- prj = mapnik2.Projection("+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs +over");
+ prj = mapnik.Projection("+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs +over");
# Get the bounds of the area to render
bbox = [float(x) for x in form.getvalue("bbox").split(",")]
output_error("Invalid bounding box")
else:
# Project the bounds to the map projection
- bbox = mapnik2.forward_(mapnik2.Box2d(*bbox), prj)
+ bbox = mapnik.forward_(mapnik.Box2d(*bbox), prj)
+
+ # Get the style to use
+ style = form.getvalue("style", "default")
# Calculate the size of the final rendered image
scale = float(form.getvalue("scale"))
output_error("Map too large")
else:
# Create map
- map = mapnik2.Map(width, height)
+ map = mapnik.Map(width, height)
# Load map configuration
- mapnik2.load_map(map, "/home/jburgess/live/osm2.xml")
+ mapnik.load_map(map, "/srv/tile.openstreetmap.org/styles/%s/project.xml" % style)
# Zoom the map to the bounding box
map.zoom_to_box(bbox)
# Render the map
if form.getvalue("format") == "png":
- image = mapnik2.Image(map.width, map.height)
- mapnik2.render(map, image)
+ image = mapnik.Image(map.width, map.height)
+ mapnik.render(map, image)
png = image.tostring("png")
output_headers("image/png", "map.png", len(png))
sys.stdout.write(png)
elif form.getvalue("format") == "jpeg":
- image = mapnik2.Image(map.width, map.height)
- mapnik2.render(map, image)
+ image = mapnik.Image(map.width, map.height)
+ mapnik.render(map, image)
jpeg = image.tostring("jpeg")
output_headers("image/jpeg", "map.jpg", len(jpeg))
sys.stdout.write(jpeg)
elif form.getvalue("format") == "svg":
- file = tempfile.NamedTemporaryFile()
+ file = tempfile.NamedTemporaryFile(prefix = "export")
surface = cairo.SVGSurface(file.name, map.width, map.height)
- mapnik2.render(map, surface)
+ mapnik.render(map, surface)
surface.finish()
output_headers("image/svg+xml", "map.svg", file_size(file))
output_file(file)
elif form.getvalue("format") == "pdf":
- file = tempfile.NamedTemporaryFile()
+ file = tempfile.NamedTemporaryFile(prefix = "export")
surface = cairo.PDFSurface(file.name, map.width, map.height)
- mapnik2.render(map, surface)
+ mapnik.render(map, surface)
surface.finish()
output_headers("application/pdf", "map.pdf", file_size(file))
output_file(file)
elif form.getvalue("format") == "ps":
- file = tempfile.NamedTemporaryFile()
+ file = tempfile.NamedTemporaryFile(prefix = "export")
surface = cairo.PSSurface(file.name, map.width, map.height)
- mapnik2.render(map, surface)
+ mapnik.render(map, surface)
surface.finish()
output_headers("application/postscript", "map.ps", file_size(file))
output_file(file)