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Service.py
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Service.py
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# coding: utf-8
import json
import logging
import os
import time
from collections import OrderedDict
from requests.auth import AuthBase
try:
from urllib.parse import urlencode
except ImportError:
from urllib import urlencode
try:
import configparser as configparser
except ImportError:
import ConfigParser as configparser
import requests
from volcengine.Policy import SecurityToken2, InnerToken, ComplexEncoder
from volcengine.auth.SignerV4 import SignerV4
from volcengine.base.Request import Request
from volcengine.util.Util import *
from volcengine import VERSION
class VolcAuth(AuthBase):
def __init__(self, client, request):
# setup any auth-related data here
self.client = client
self.request = request
def __call__(self, r):
self.request.body = r.body
if "Content-Type" in r.headers:
self.request.headers["Content-Type"] = r.headers["Content-Type"]
if "Content-Length" in r.headers:
self.request.headers["Content-Length"] = r.headers["Content-Length"]
SignerV4.sign(self.request, self.client.service_info.credentials)
for k in self.request.headers:
v = self.request.headers[k]
r.headers[k] = v
return r.headers
class Service(object):
def __init__(self, service_info, api_info):
self.service_info = service_info
self.api_info = api_info
self.session = requests.session()
self.init()
def init(self):
if 'VOLC_ACCESSKEY' in os.environ and 'VOLC_SECRETKEY' in os.environ:
self.service_info.credentials.set_ak(os.environ['VOLC_ACCESSKEY'])
self.service_info.credentials.set_sk(os.environ['VOLC_SECRETKEY'])
else:
if os.environ.get('HOME', None) is None:
return
# 先尝试从credentials中读取ak、sk,credentials不存在则从config中读取
path_ini = os.environ['HOME'] + '/.volc/credentials'
path_json = os.environ['HOME'] + '/.volc/config'
if os.path.isfile(path_ini):
conf = configparser.ConfigParser()
conf.read(path_ini)
default_section, ak_option, sk_option = "default", "access_key_id", "secret_access_key"
if conf.has_section(default_section):
if conf.has_option(default_section, ak_option):
ak = conf.get(default_section, ak_option)
self.service_info.credentials.set_ak(ak)
if conf.has_option(default_section, sk_option):
sk = conf.get(default_section, sk_option)
self.service_info.credentials.set_sk(sk)
elif os.path.isfile(path_json):
with open(path_json, 'r') as f:
try:
j = json.load(f)
except Exception:
logging.warning("%s is not json file", path_json)
return
if 'ak' in j:
self.service_info.credentials.set_ak(j['ak'])
if 'sk' in j:
self.service_info.credentials.set_sk(j['sk'])
def set_ak(self, ak):
self.service_info.credentials.set_ak(ak)
def set_sk(self, sk):
self.service_info.credentials.set_sk(sk)
def set_session_token(self, session_token):
self.service_info.credentials.set_session_token(session_token)
def set_host(self, host):
self.service_info.host = host
def set_scheme(self, scheme):
self.service_info.scheme = scheme
def get_sign_url(self, api, params):
if not (api in self.api_info):
raise Exception("no such api")
api_info = self.api_info[api]
mquery = self.merge(api_info.query, params)
r = Request()
r.set_shema(self.service_info.scheme)
r.set_method(api_info.method)
r.set_path(api_info.path)
r.set_query(mquery)
return SignerV4.sign_url(r, self.service_info.credentials)
def get(self, api, params, doseq=0):
if not (api in self.api_info):
raise Exception("no such api")
api_info = self.api_info[api]
r = self.prepare_request(api_info, params, doseq)
SignerV4.sign(r, self.service_info.credentials)
url = r.build(doseq)
resp = self.session.get(url, headers=r.headers,
timeout=(self.service_info.connection_timeout, self.service_info.socket_timeout))
if resp.status_code == 200:
return resp.text
else:
raise Exception(resp.text)
def post(self, api, params, form):
if not (api in self.api_info):
raise Exception("no such api")
api_info = self.api_info[api]
r = self.prepare_request(api_info, params)
r.headers['Content-Type'] = 'application/x-www-form-urlencoded'
r.form = self.merge(api_info.form, form)
r.body = urlencode(r.form, True)
SignerV4.sign(r, self.service_info.credentials)
url = r.build()
resp = self.session.post(url, headers=r.headers, data=r.form,
timeout=(self.service_info.connection_timeout, self.service_info.socket_timeout))
if resp.status_code == 200:
return resp.text
else:
raise Exception(resp.text)
def request(self, api, params, data, files=None, reqConfig=None):
if not (api in self.api_info):
raise Exception("no such api")
api_info = self.api_info[api]
r = self.prepare_request(api_info, params)
if reqConfig is not None:
reqConfig(r)
url = r.build()
resp = self.session.request(api_info.method, url, data=data, files=files,
timeout=(self.service_info.connection_timeout, self.service_info.socket_timeout),
auth=VolcAuth(self, r))
if resp.status_code == 200:
return resp.text
else:
raise Exception(resp.text)
def json(self, api, params, body):
if not (api in self.api_info):
raise Exception("no such api")
api_info = self.api_info[api]
r = self.prepare_request(api_info, params)
r.headers['Content-Type'] = 'application/json'
r.body = body
SignerV4.sign(r, self.service_info.credentials)
url = r.build()
resp = self.session.post(url, headers=r.headers, data=r.body,
timeout=(self.service_info.connection_timeout, self.service_info.socket_timeout))
if resp.status_code == 200:
return json.dumps(resp.json())
else:
raise Exception(resp.text.encode("utf-8"))
def put(self, url, file_path, headers):
with open(file_path, 'rb') as f:
resp = self.session.put(url, headers=headers, data=f)
if resp.status_code == 200:
return True, resp.text.encode("utf-8")
else:
return False, resp.text.encode("utf-8")
def put_data(self, url, data, headers):
resp = self.session.put(url, headers=headers, data=data)
if resp.status_code == 200:
return True, resp.text.encode("utf-8")
else:
return False, resp.text.encode("utf-8")
def prepare_request(self, api_info, params, doseq=0):
for key in params:
if type(params[key]) == int or type(params[key]) == float or type(params[key]) == bool:
params[key] = str(params[key])
elif sys.version_info[0] != 3:
if type(params[key]) == unicode:
params[key] = params[key].encode('utf-8')
elif type(params[key]) == list:
if not doseq:
params[key] = ','.join(params[key])
connection_timeout = self.service_info.connection_timeout
socket_timeout = self.service_info.socket_timeout
r = Request()
r.set_shema(self.service_info.scheme)
r.set_method(api_info.method)
r.set_connection_timeout(connection_timeout)
r.set_socket_timeout(socket_timeout)
mheaders = self.merge(api_info.header, self.service_info.header)
mheaders['Host'] = self.service_info.host
mheaders['User-Agent'] = 'volc-sdk-python/' + VERSION
r.set_headers(mheaders)
mquery = self.merge(api_info.query, params)
r.set_query(mquery)
r.set_host(self.service_info.host)
r.set_path(api_info.path)
return r
def merge(self, param1, param2):
od = OrderedDict()
for key in param1:
od[key] = param1[key]
for key in param2:
od[key] = param2[key]
return od
def sign_sts2(self, policy, expire):
sk = self.service_info.credentials.sk
key = hashlib.md5(sk.encode('utf-8')).digest()
sts = SecurityToken2()
sts.access_key_id = Util.generate_access_key_id('AKTP')
sts.secret_access_key = Util.generate_secret_key()
now = int(time.time())
sts.current_time = Service.to_rfc3339(now)
if expire < 60:
expire = 60
expire = now + expire
sts.expired_time = Service.to_rfc3339(expire)
inner_token = InnerToken()
inner_token.lt_access_key_id = self.service_info.credentials.ak
inner_token.access_key_id = sts.access_key_id
if policy is None:
inner_token.policy_string = ''
else:
inner_token.policy_string = json.dumps(
policy, cls=ComplexEncoder, sort_keys=True).replace(' ', '')
inner_token.signed_secret_access_key = Util.aes_encrypt_cbc_with_base64(
sts.secret_access_key, key)
inner_token.expired_time = expire
sign_str = '{}|{}|{}|{}|{}'.format(inner_token.lt_access_key_id, inner_token.access_key_id,
inner_token.expired_time, inner_token.signed_secret_access_key,
inner_token.policy_string)
inner_token.signature = Util.to_hex(Util.hmac_sha256(key, sign_str))
sts.session_token = 'STS2' + base64.b64encode(
json.dumps(inner_token, cls=ComplexEncoder, sort_keys=True).replace(' ', '').encode('utf-8')).decode()
return sts
@staticmethod
def to_rfc3339(t):
format_time = time.strftime('%Y-%m-%dT%H:%M:%S%z', time.localtime(t))
pos = format_time.find('+')
if pos == -1:
pos = format_time.find('-')
return format_time[:pos + 3] + ':' + format_time[pos + 3:pos + 5]