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# SPDX-License-Identifier: BSD-3-Clause
#
# Copyright 2010 Raritan Inc. All rights reserved.
# Avoid name clash with raritan.rpc.sys
from __future__ import absolute_import
import base64, json, ssl, sys, uuid
import raritan.rpc
try:
# Python 3
import urllib.request as urllib_request
except ImportError:
# Python 2
import urllib2 as urllib_request
class Agent(object):
"""Provides transport to one RPC service, e.g. one PX2 device - holds host,
user name, and password."""
id = 1
def __init__(self, proto, host, user = None, passwd = None, token = None,
debug = False, disable_certificate_verification = False, timeout = None):
self.url = "%s://%s" % (proto, host)
self.user = user
self.passwd = passwd
self.token = token # authentication token
self.debug = debug
self.timeout = timeout
context = None
if disable_certificate_verification:
import ssl
if "_create_unverified_context" in ssl.__dict__.keys():
context = ssl._create_unverified_context()
self.opener = urllib_request.OpenerDirector()
self.opener.add_handler(urllib_request.HTTPHandler())
try:
self.opener.add_handler(urllib_request.HTTPSHandler(context = context))
except TypeError:
# Python < 2.7.9
self.opener.add_handler(urllib_request.HTTPSHandler())
Agent.defaultInst = self
def __create_request(self, target_url, data = None):
Agent.id += 1
if data != None:
request = urllib_request.Request(target_url, data)
else:
request = urllib_request.Request(target_url)
if self.token != None:
request.add_header("X-SessionToken", self.token)
elif self.user != None and self.passwd != None:
basic = base64.b64encode(str.encode('%s:%s' % (self.user, self.passwd)))
request.add_header('Authorization', 'Basic ' + bytes.decode(basic))
return request
def __open_request(self, request):
try:
if (self.timeout):
response = self.opener.open(request, timeout = self.timeout)
else:
response = self.opener.open(request)
except IOError as e:
if str(e).find("CERTIFICATE_VERIFY_FAILED") >= 0:
sys.stderr.write("==================================================================\n")
sys.stderr.write(" SSL certificate verification failed!\n")
sys.stderr.write("\n")
sys.stderr.write(" When connecting to a device without valid SSL certificate, try\n")
sys.stderr.write(" adding 'disable_certificate_verification=True' when creating the\n")
sys.stderr.write(" raritan.rpc.Agent instance.\n")
sys.stderr.write("==================================================================\n")
raise raritan.rpc.HttpException("Opening URL %s failed: %s" % (request.get_full_url(), e))
return response
def set_auth_basic(self, user, passwd):
self.user = user
self.passwd = passwd
self.token = None
def set_auth_token(self, token):
self.user = None
self.passwd = None
self.token = token
def handle_http_redirect(self, rid, response):
location = response.headers["Location"]
baselen = len(location) - len(rid)
if baselen <= 0:
return False
elif location[baselen:] != rid:
return False
else:
self.url = location[:baselen]
if self.debug:
print("Redirected to: " + self.url)
return True
def get(self, target, redirected = False):
target_url = "%s/%s" % (self.url, target)
request = self.__create_request(target_url)
response = self.__open_request(request)
if response.code == 302 and not redirected:
# handle HTTP-to-HTTPS redirect and try again
if self.handle_http_redirect(target, response):
return self.get(target, True)
# get and process response
try:
resp = response.read()
except:
raise raritan.rpc.HttpException("Reading response failed.")
if response.code != 200:
raise raritan.rpc.HttpException("HTTP Error %d\nResponse:\n%s" % (response.code, str(resp)))
if (self.debug):
print("download: Response:\n%s" % str(resp))
return resp
def form_data_file(self, target, datas, filenames, formnames, mimetypes, redirected = False):
target_url = "%s/%s" % (self.url, target)
request = self.__create_request(target_url)
boundary = uuid.uuid4().hex
# for certificate use key_file and cert_file
bodyArr = []
for i in range(len(filenames)):
data = datas[i]
filename = filenames[i]
formname = formnames[i]
mimetype = mimetypes[i]
bodyArr.append('--%s' % boundary)
bodyArr.append('Content-Disposition: form-data; name="%s"; filename="%s"' % (formname, filename))
bodyArr.append('Content-Type: %s' % mimetype)
bodyArr.append('')
bodyArr.append(data)
bodyArr.append('--%s--' % boundary)
body = bytes()
for l in bodyArr:
if isinstance(l, bytes): body += l + b'\r\n'
else: body += bytes(l, encoding='utf8') + b'\r\n'
request.add_header('Content-Type', 'multipart/form-data; boundary=%s' % boundary)
try:
request.data = body
except AttributeError:
request.add_data(body)
response = self.__open_request(request)
if response.code == 302 and not redirected:
# handle HTTP-to-HTTPS redirect and try again
if self.handle_http_redirect(target, response):
return self.form_data_file(target, datas, filenames, mimetypes, True)
# get and process response
try:
resp = bytes.decode(response.read())
except:
raise raritan.rpc.HttpException("Reading response failed.")
if response.code != 200:
raise raritan.rpc.HttpException("HTTP Error %d\nResponse:\n%s" % (response.code, resp))
if (self.debug):
print("form_data: Response:\n%s" % resp)
return response
def json_rpc(self, target, method, params = [], redirected = False):
request_json = json.dumps({"method": method, "params": params, "id": Agent.id})
if (self.debug):
print("json_rpc: %s() - %s: , request = %s" % (method, target, request_json))
target_url = "%s/%s" % (self.url, target)
request = self.__create_request(target_url, str.encode(request_json))
if self.token != None:
request.add_header("X-SessionToken", self.token)
elif self.user != None and self.passwd != None:
basic = base64.b64encode(str.encode('%s:%s' % (self.user, self.passwd)))
request.add_header('Authorization', 'Basic ' + bytes.decode(basic))
response = self.__open_request(request)
if response.code == 302 and not redirected:
# handle HTTP-to-HTTPS redirect and try again
if self.handle_http_redirect(target, response):
return self.json_rpc(target, method, params, True)
# get and process response
try:
resp = bytes.decode(response.read())
except:
raise raritan.rpc.HttpException("Reading response failed.")
if response.code != 200:
raise raritan.rpc.HttpException("HTTP Error %d\nResponse:\n%s" % (response.code, resp))
if (self.debug):
print("json_rpc: Response:\n%s" % resp)
try:
resp_json = json.loads(resp)
except ValueError as e:
raise raritan.rpc.JsonRpcSyntaxException(
"Decoding response to JSON failed: %s" % e)
if "error" in resp_json:
try:
code = resp_json["error"]["code"]
msg = resp_json["error"]["message"]
except KeyError:
raise raritan.rpc.JsonRpcSyntaxException(
"JSON RPC returned malformed error: %s" % resp_json)
raise raritan.rpc.JsonRpcErrorException(
"JSON RPC returned error: code = %d, msg = %s" % (code, msg))
try:
res = resp_json["result"]
except KeyError:
raise raritan.rpc.JsonRpcSyntaxException(
"Result is missing in JSON RPC response: %s" % resp_json)
return res
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