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import urllib, re, json, socket
"""
Python object that enables connection to RR v3 API.
Errors (not bugs!) and more welcome fixes/suggestions please
post to https://savannah.cern.ch/projects/cmsrunregistry/
"""
class RRApiError(Exception):
"""
API Exception class
"""
def __init__(self, resp):
"""
Construct exception by providing response object.
"""
if isinstance(resp, str):
self.message = resp
else:
self.url = resp.geturl()
self.code = resp.getcode()
self.stack = None
for line in resp.read().split("\n"):
if self.stack == None:
m = re.search("<pre>(.*)", line)
if m != None:
self.stack = m.group(1)
m = re.search("^.+\\.([^\\.]+: .*)$", self.stack)
if m != None:
self.message = m.group(1)
else:
self.message = line
else:
m = re.search("(.*)</pre>", line)
if m != None:
self.stack = self.stack + "\n" + m.group(1)
break
else:
self.stack = self.stack + "\n" + line
def __str__(self):
""" Get message """
return self.message
class RRApi:
"""
RR API object
"""
def __init__(self, url, debug = False):
"""
Construct API object.
url: URL to RRv3 API, i.e. http://localhost:8080/rr_user
debug: should debug messages be printed out? Verbose!
"""
self.debug = debug
self.url = re.sub("/*$", "/api/", url)
self.app = self.get(["app"])
self.dprint("app = ", self.app)
def dprint(self, *args):
"""
Print debug information
"""
if self.debug:
print("RRAPI:", end=' ')
for arg in args:
print(arg, end=' ')
print()
def get(self, parts, data = None):
"""
General API call (do not use it directly!)
"""
#
# Constructing request path
#
callurl = self.url + "/".join(urllib.quote(p) for p in parts)
#
# Constructing data payload
#
sdata = None
if data != None:
sdata = json.dumps(data)
#
# Do the query and respond
#
self.dprint(callurl, "with payload", sdata)
resp = urllib.urlopen(callurl, sdata)
has_getcode = "getcode" in dir(resp)
if self.debug:
if has_getcode:
self.dprint("Response", resp.getcode(), " ".join(str(resp.info()).split("\r\n")))
else:
self.dprint("Response", " ".join(str(resp.info()).split("\r\n")))
if not has_getcode or resp.getcode() == 200:
rdata = resp.read()
if re.search("json", resp.info().gettype()):
try:
return json.loads(rdata)
except TypeError as e:
self.dprint(e)
return rdata
else:
return rdata
else:
raise RRApiError(resp)
def tags(self):
"""
Get version tags (USER app only)
"""
if self.app != "user":
raise RRApiError("Tags call is possible only in user app")
return self.get(["tags"])
def workspaces(self):
"""
Get workspaces (all apps)
"""
return self.get(["workspaces"])
def tables(self, workspace):
"""
Get tables for workspace (all apps)
"""
return self.get([workspace, "tables"])
def columns(self, workspace, table):
"""
Get columns for table for workspace (all apps)
"""
return self.get([workspace, table, "columns"])
def templates(self, workspace, table):
"""
Get output templates for table for workspace (all apps)
"""
return self.get([workspace, table, "templates"])
def count(self, workspace, table, filter = None, query = None, tag = None):
"""
Get number of rows for table for workspace with filter, query (all apps) or tag (USER app only)
"""
#
# Constructing request path
#
req = [ workspace, table ]
if tag != None:
if self.app != "user":
raise RRApiError("Tags are possible only in user app")
else:
req.append(tag)
req.append("count")
#
# Constructing filter/query payload
#
filters = {}
if filter != None:
filters['filter'] = filter
if query != None:
filters['query'] = query
return int(self.get(req, filters))
def data(self, workspace, table, template, columns = None, filter = None, query = None, order = None, tag = None):
"""
Get data for table for workspace with filter, query (all apps) or tag (USER app only)
"""
#
# Check req parameters
#
if not isinstance(workspace, str):
raise RRApiError("workspace parameter must be str")
#
# Constructing request path
#
req = [ workspace, table, template ]
if columns != None:
req.append(",".join(columns))
else:
req.append("all")
if order != None:
req.append(",".join(order))
else:
req.append("none")
if tag != None:
if self.app != "user":
raise RRApiError("Tags are possible only in user app")
else:
req.append(tag)
req.append("data")
#
# Constructing filter/query payload
#
filters = {}
if filter != None:
filters['filter'] = filter
if query != None:
filters['query'] = query
return self.get(req, filters)
def reports(self, workspace):
"""
Get available reports (USER app only)
"""
if self.app != "user":
raise RRApiError("Reports available only in user app")
return self.get([workspace, "reports"])
def report(self, workspace, report):
"""
Get report data (USER app only)
"""
if self.app != "user":
raise RRApiError("Reports available only in user app")
return self.get([workspace, report, "data"])
if __name__ == '__main__':
print("RR API library.")
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