OSM Proxy missing Headers - HTTP Error 403: Forbidden

[thorge]

Hello!

I tried to proxy OSM maps with Tilestache, uWSGI and NGINX.

"osm_layer": {
      "provider": {
          "name": "proxy",
          "url": "http://a.tile.openstreetmap.org/{Z}/{X}/{Y}.png"
      }
  }

I encountered the following problem:

Sep 16 06:47:27 gis uwsgi[3414]: Traceback (most recent call last):
Sep 16 06:47:27 gis uwsgi[3414]:   File "/usr/local/lib/python2.7/dist-packages/TileStache/__init__.py", line 393, in __call__
Sep 16 06:47:27 gis uwsgi[3414]:     status_code, headers, content = requestHandler2(self.config, path_info, query_string, script_name)
Sep 16 06:47:27 gis uwsgi[3414]:   File "/usr/local/lib/python2.7/dist-packages/TileStache/__init__.py", line 266, in requestHandler2
Sep 16 06:47:27 gis uwsgi[3414]:     status_code, headers, content = layer.getTileResponse(coord, extension)
Sep 16 06:47:27 gis uwsgi[3414]:   File "/usr/local/lib/python2.7/dist-packages/TileStache/Core.py", line 426, in getTileResponse
Sep 16 06:47:27 gis uwsgi[3414]:     tile = self.render(coord, format)
Sep 16 06:47:27 gis uwsgi[3414]:   File "/usr/local/lib/python2.7/dist-packages/TileStache/Core.py", line 513, in render
Sep 16 06:47:27 gis uwsgi[3414]:     tile = provider.renderTile(width, height, srs, coord)
Sep 16 06:47:27 gis uwsgi[3414]:   File "/usr/local/lib/python2.7/dist-packages/TileStache/Providers.py", line 266, in renderTile
Sep 16 06:47:27 gis uwsgi[3414]:     body = url_opener.open(url, timeout=self.timeout).read()
Sep 16 06:47:27 gis uwsgi[3414]:   File "/usr/lib/python2.7/urllib2.py", line 435, in open
Sep 16 06:47:27 gis uwsgi[3414]:     response = meth(req, response)
Sep 16 06:47:27 gis uwsgi[3414]:   File "/usr/lib/python2.7/urllib2.py", line 548, in http_response
Sep 16 06:47:27 gis uwsgi[3414]:     'http', request, response, code, msg, hdrs)
Sep 16 06:47:27 gis uwsgi[3414]:   File "/usr/lib/python2.7/urllib2.py", line 473, in error
Sep 16 06:47:27 gis uwsgi[3414]:     return self._call_chain(*args)
Sep 16 06:47:27 gis uwsgi[3414]:   File "/usr/lib/python2.7/urllib2.py", line 407, in _call_chain
Sep 16 06:47:27 gis uwsgi[3414]:     result = func(*args)
Sep 16 06:47:27 gis uwsgi[3414]:   File "/usr/lib/python2.7/urllib2.py", line 556, in http_error_default
Sep 16 06:47:27 gis uwsgi[3414]:     raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
Sep 16 06:47:27 gis uwsgi[3414]: urllib2.HTTPError: HTTP Error 403: Forbidden

I could break it down to missing headers, so I tried with different Referers and User-Agents (see https://operations.osmfoundation.org/policies/tiles/ ) but in the end i could break it down to a missing "Accept" header.

When I add the following line to /usr/local/lib/python2.7/dist-packages/TileStache/Providers.py on line 263 in renderTile function, everything works fine:

url_opener.addheaders = [('Accept', 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3')]

It seems, that the accept header is sufficient for OSM.

Any thoughts on this one? How to fix best? Add a field for accept headers in tilestache.cfg or hardcode to renderTile function? Anything else I'm doing wrong, that this issues comes up? Nobody else with this problem?