def process(self):
""" TODO: parsing request
0. Traslate params to canonic form
1. Is it a WMS? (SERVICE=WMS, VERSION=1.x)
2. Check type (REQUEST=GetMap etc)
3. Create an appropriate handler.
4. Handler gets data from database and remote servers.
"""
try:
parsed = urlparse.urlparse(self.uri)
qs = Wms.wmsParseQuery(parsed[4])
layerset = qs['SET'] # TODO: parse URL instead
if self.ensureWms(qs):
reqtype = qs['REQUEST'].upper()
if reqtype == 'GETCAPABILITIES':
return self.handleGetCapabilities(qs)
elif reqtype == 'GETMAP':
return self.handleGetMap(qs)
elif reqtype == 'GETFEATUREINFO':
return self.handleGetFeatureInfo(qs)
else:
self.reportWmsError("Sorry, not implemented yet.", "NotImplemented")
else:
self.reportWmsError("Invalid WMS request", "InvalidRequest")
except Exception as ex:
self.reportWmsError("Internal error: %s %s" % (type(ex), ex), "InternalError")
def connectionMade(self):
# s.f.remote is either path or full url if it is proxy connection
parsed = urlparse.urlparse(self.factory.remote)
self._params = self.factory.params.copy()
del self._params['SET']
host = parsed.netloc # hostname:port
login = self.factory.login
password = self.factory.password
parsed_list = list(parsed)
# TODO: this should be handled carefully: we have to merge remote's
# params, not overwrite
parsed_list[4] = Wms.wmsBuildQuery(self._params)
self.sendCommand('GET', urlparse.urlunparse(parsed_list))
self.sendHeader('Host', host)
self.sendHeader('User-Agent', SERVER_AGENT)
if login and password:
b64str = base64.encodestring(login+':'+password)[:-1]
self.sendHeader('Authorization', 'Basic ' + b64str)
self.endHeaders()
self.factory.connectionMade()
def reportWmsError(self, errorMessage, code):
xml = Wms.wmsErrorXmlString(errorMessage, code)
self.setHeader('Content-type', 'application/vnd.ogc.se_xml')
self.setHeader('Length', str(len(xml)))
self.write(xml)
self.finish()
