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import json |
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import urllib |
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3
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import signal |
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import sys |
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import time |
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import pycurl |
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8
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POST_PARAMS = {} |
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MAX_ATTEMPTS = 3 |
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11
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class Client: |
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def __init__(self, action, api_url, api_user, api_password, method): |
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self.conn = None |
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self.action = action |
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self.keep_trying = 1 |
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self.api_url = api_url |
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self.api_user = api_user |
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self.api_password = api_password |
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self.method = method |
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self.buffer = '' |
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signal.signal(signal.SIGINT, self.handle_ctrl_c) |
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def handle_ctrl_c(self, signal, frame): |
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sys.stderr.write('SIGINT receivied') |
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sys.stderr.write('You pressed Ctrl+C?!') |
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self.abort_session() |
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def abort_session(self): |
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self.keep_trying = 0 |
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self.conn.close() |
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def setup_connection(self): |
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if self.conn: |
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self.conn.close() |
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self.headers = ['Accept: application/json', 'Expect:', 'Connection: close'] |
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self.conn = pycurl.Curl() |
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self.conn.setopt(pycurl.SSL_VERIFYHOST, False) |
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self.conn.setopt(pycurl.SSL_VERIFYPEER, False) |
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self.conn.setopt(pycurl.USERPWD, "%s:%s" % (self.api_user, self.api_password)) |
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self.conn.setopt(pycurl.URL, self.api_url) |
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self.conn.setopt(pycurl.VERBOSE, 0) |
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self.conn.setopt(pycurl.WRITEFUNCTION, self.on_receive) |
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self.conn.setopt(pycurl.NOSIGNAL, 1) |
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self.conn.setopt(pycurl.NOPROGRESS, 1) |
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self.conn.setopt(pycurl.HTTPHEADER, self.headers) |
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if self.method == 'post': |
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self.conn.setopt(pycurl.POST, 1) |
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self.conn.setopt(pycurl.POSTFIELDS, urllib.urlencode(POST_PARAMS)) |
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elif self.method == 'get': |
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self.conn.setopt(pycurl.POST, 0) |
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54
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def on_receive(self, data): |
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# self.action.logger.debug('Icinga2GetStatus: client on_receive, data: %s', data) |
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# complete message received |
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self.buffer += data |
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# sys.stderr.write(data) |
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try: |
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event = json.loads(self.buffer) |
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update_body = True |
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except: |
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# no json found |
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update_body = False |
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if update_body: |
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if self.action is not None: |
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# sys.stderr.write('Updating body\n') |
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self.action.set_body(event) |
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else: |
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print event |
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73
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def __del__(self): |
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self.conn.close() |
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def make_call(self): |
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backoff_network_error = 0.25 |
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backoff_http_error = 1 |
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backoff_rate_limit = 60 |
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attempt = 0 |
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while True and self.keep_trying == 1 and attempt < MAX_ATTEMPTS: |
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attempt += 1 |
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self.setup_connection() |
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try: |
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self.conn.perform() |
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except: |
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# Network error, use linear back off up to 16 seconds |
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if self.keep_trying == 0: |
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continue |
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sys.stderr.write('Network error: %s' % self.conn.errstr()) |
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sys.stderr.write('Waiting %s seconds before trying again' % backoff_network_error) |
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time.sleep(backoff_network_error) |
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backoff_network_error = min(backoff_network_error + 1, 16) |
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continue |
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# HTTP Error |
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sc = self.conn.getinfo(pycurl.HTTP_CODE) |
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if sc == 200: |
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# sys.stderr.write('HTTP request successful.') |
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self.conn.close() |
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break |
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elif sc == 420: |
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# Rate limit, use exponential back off starting with 1 minute then doubling |
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sys.stderr.write('Rate limit, waiting %s seconds' % backoff_rate_limit) |
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time.sleep(backoff_rate_limit) |
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backoff_rate_limit *= 2 |
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elif sc == 401: |
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# Authentication error |
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sys.stderr.write('Authentication error, check user/password.') |
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self.action.error = 1 |
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break |
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elif sc == 404: |
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# Authorization error |
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sys.stderr.write('Object not found. Verify request and/or check permissions.') |
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self.action.error = 2 |
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break |
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elif sc == 400: |
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# Authorization error |
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sys.stderr.write('Bad request.') |
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119
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self.action.error = 3 |
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120
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break |
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121
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else: |
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122
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# HTTP error, use exponential back off up to 320 seconds |
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sys.stderr.write('HTTP error %s, %s' % (sc, self.conn.errstr())) |
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sys.stderr.write('Waiting %s seconds' % backoff_http_error) |
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time.sleep(backoff_http_error) |
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backoff_http_error = min(backoff_http_error * 2, 10) |
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127
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StackStorm /
st2contrib
