def application(environ, start_response):
"""Main WSGI handler that processes client requests and calls
the proper functions.
"""
global routes
fname = environ['PATH_INFO']
# Among others, this will filter wrong function names,
# but also the favicon.ico request, for instance.
if fname is None:
raise WIClientError('Method name not recognized!')
# return send_html_response(status, 'Error! ' + status, start_response)
try:
outForm = 'xml'
if environ['REQUEST_METHOD'] == 'GET':
form = cgi.FieldStorage(fp=environ['wsgi.input'], environ=environ)
if 'format' in form:
outForm = form['format'].value.lower()
elif environ['REQUEST_METHOD'] == 'POST':
form = ''
try:
length = int(environ.get('CONTENT_LENGTH', '0'))
except ValueError:
length = 0
# If there is a body to read
if length != 0:
form = environ['wsgi.input'].read(length)
else:
form = environ['wsgi.input'].read()
for line in form.splitlines():
if not len(line):
continue
if '=' not in line:
break
k, v = line.split('=')
if k.strip() == 'format':
outForm = v.strip()
else:
raise Exception
except ValueError as e:
if str(e) == "Maximum content length exceeded":
# Add some user-friendliness (this message triggers an alert
# box on the client)
return send_plain_response("400 Bad Request",
"maximum request size exceeded",
start_response)
return send_plain_response("400 Bad Request", str(e), start_response)
# Check whether the function called is implemented
implementedFunctions = ['query', 'application.wadl', 'localconfig',
'version', 'info']
config = configparser.RawConfigParser()
here = os.path.dirname(__file__)
config.read(os.path.join(here, 'routing.cfg'))
#verbo = config.getint('Service', 'verbosity')
verbo = config.get('Service', 'verbosity')
# Warning is the default value
verboNum = getattr(logging, verbo.upper(), 30)
logging.basicConfig(level=verboNum)
if routes is None:
# Add routing cache here, to be accessible to all modules
routesFile = os.path.join(here, 'data', 'routing.xml')
#invFile = os.path.join(here, 'data', 'Arclink-inventory.xml')
masterFile = os.path.join(here, 'data', 'masterTable.xml')
#routes = RoutingCache(routesFile, masterFile, Logs(verbo))
routes = RoutingCache(routesFile, masterFile)
fname = environ['PATH_INFO'].split('/')[-1]
if fname not in implementedFunctions:
return send_plain_response("400 Bad Request",
'Function "%s" not implemented.' % fname,
start_response)
if fname == 'application.wadl':
iterObj = ''
here = os.path.dirname(__file__)
appWadl = os.path.join(here, 'application.wadl')
with open(appWadl, 'r') \
as appFile:
iterObj = appFile.read()
status = '200 OK'
return send_xml_response(status, iterObj, start_response)
elif fname == 'query':
makeQuery = globals()['makeQuery%s' % environ['REQUEST_METHOD']]
try:
iterObj = makeQuery(form)
iterObj = applyFormat(iterObj, outForm)
status = '200 OK'
if outForm == 'xml':
return send_xml_response(status, iterObj, start_response)
else:
return send_plain_response(status, iterObj, start_response)
except WIError as w:
return send_plain_response(w.status, w.body, start_response)
elif fname == 'localconfig':
return send_xml_response('200 OK', routes.localConfig(),
start_response)
elif fname == 'version':
text = "1.0.2"
return send_plain_response('200 OK', text, start_response)
elif fname == 'info':
config = configparser.RawConfigParser()
here = os.path.dirname(__file__)
config.read(os.path.join(here, 'routing.cfg'))
text = config.get('Service', 'info')
return send_plain_response('200 OK', text, start_response)
raise Exception('This point should have never been reached!')
