def sso_validate(payload, signature, secret):
"""
payload: provided by Discourse HTTP call to your SSO endpoint as sso GET param
signature: provided by Discourse HTTP call to your SSO endpoint as sig GET param
secret: the secret key you entered into Discourse sso secret
return value: The nonce used by discourse to validate the redirect URL
"""
if None in [payload, signature]:
raise DiscourseError('No SSO payload or signature.')
if not secret:
raise DiscourseError('Invalid secret..')
payload = unquote(payload)
if not payload:
raise DiscourseError('Invalid payload..')
decoded = base64.decodestring(payload)
if 'nonce' not in decoded:
raise DiscourseError('Invalid payload..')
h = hmac.new(secret, payload, digestmod=hashlib.sha256)
this_signature = h.hexdigest()
if this_signature != signature:
raise DiscourseError('Payload does not match signature.')
nonce = decoded.split('=')[1]
return nonce
def sso_validate(payload, signature, secret):
"""
payload: provided by Discourse HTTP call to your SSO endpoint as sso GET param
signature: provided by Discourse HTTP call to your SSO endpoint as sig GET param
secret: the secret key you entered into Discourse sso secret
return value: The nonce used by discourse to validate the redirect URL
"""
if None in [payload, signature]:
raise DiscourseError('No SSO payload or signature.')
if not secret:
raise DiscourseError('Invalid secret..')
payload = unquote(payload)
if not payload:
raise DiscourseError('Invalid payload..')
decoded = b64decode(payload.encode('utf-8')).decode('utf-8')
if 'nonce' not in decoded:
raise DiscourseError('Invalid payload..')
h = hmac.new(secret.encode('utf-8'),
payload.encode('utf-8'),
digestmod=hashlib.sha256)
this_signature = h.hexdigest()
if this_signature != signature:
raise DiscourseError('Payload does not match signature.')
# Discourse returns querystring encoded value. We only need `nonce`
qs = parse_qs(decoded)
return qs['nonce'][0]
def _request(self, verb, path, params):
params['api_key'] = self.api_key
if 'api_username' not in params:
params['api_username'] = self.api_username
url = self.host + path
response = requests.request(verb,
url,
allow_redirects=False,
params=params,
timeout=self.timeout)
log.debug('response %s: %s', response.status_code, repr(response.text))
if not response.ok:
try:
msg = u','.join(response.json()['errors'])
except (ValueError, TypeError, KeyError):
if response.reason:
msg = response.reason
else:
msg = u'{0}: {1}'.format(response.status_code,
response.text)
if 400 <= response.status_code < 500:
raise DiscourseClientError(msg, response=response)
raise DiscourseServerError(msg, response=response)
if response.status_code == 302:
raise DiscourseError(
'Unexpected Redirect, invalid api key or host?',
response=response)
json_content = 'application/json; charset=utf-8'
content_type = response.headers['content-type']
if content_type != json_content:
# some calls return empty html documents
if response.content == ' ':
return None
raise DiscourseError(
'Invalid Response, expecting "{0}" got "{1}"'.format(
json_content, content_type),
response=response)
try:
decoded = response.json()
except ValueError:
raise DiscourseError('failed to decode response',
response=response)
if 'errors' in decoded:
message = decoded.get('message')
if not message:
message = u','.join(decoded['errors'])
raise DiscourseError(message, response=response)
return decoded
def _request(
self, verb, path, params=None, files=None, data=None, json=None, override_request_kwargs=None
):
"""
Executes HTTP request to API and handles response
Args:
verb: HTTP verb as string: GET, DELETE, PUT, POST
path: the path on the Discourse API
params: dictionary of parameters to include to the API
override_request_kwargs: dictionary of requests.request keyword arguments to override defaults
Returns:
dictionary of response body data or None
"""
override_request_kwargs = override_request_kwargs or {}
url = self.host + path
headers = {
"Accept": "application/json; charset=utf-8",
"Api-Key": self.api_key,
"Api-Username": self.api_username,
}
# How many times should we retry if rate limited
retry_count = 4
# Extra time (on top of that required by API) to wait on a retry.
retry_backoff = 1
while retry_count > 0:
request_kwargs = dict(
allow_redirects=False,
params=params,
files=files,
data=data,
json=json,
headers=headers,
timeout=self.timeout,
)
request_kwargs.update(override_request_kwargs)
response = requests.request(verb, url, **request_kwargs)
log.debug("response %s: %s", response.status_code, repr(response.text))
if response.ok:
break
if not response.ok:
try:
msg = u",".join(response.json()["errors"])
except (ValueError, TypeError, KeyError):
if response.reason:
msg = response.reason
else:
msg = u"{0}: {1}".format(response.status_code, response.text)
if 400 <= response.status_code < 500:
if 429 == response.status_code:
# This codepath relies on wait_seconds from Discourse v2.0.0.beta3 / v1.9.3 or higher.
rj = response.json()
wait_delay = (
retry_backoff + rj["extras"]["wait_seconds"]
) # how long to back off for.
if retry_count > 1:
time.sleep(wait_delay)
retry_count -= 1
log.info(
"We have been rate limited and waited {0} seconds ({1} retries left)".format(
wait_delay, retry_count
)
)
log.debug("API returned {0}".format(rj))
continue
else:
raise DiscourseClientError(msg, response=response)
# Any other response.ok resulting in False
raise DiscourseServerError(msg, response=response)
if retry_count == 0:
raise DiscourseRateLimitedError(
"Number of rate limit retries exceeded. Increase retry_backoff or retry_count",
response=response,
)
if response.status_code == 302:
raise DiscourseError(
"Unexpected Redirect, invalid api key or host?", response=response
)
json_content = "application/json; charset=utf-8"
content_type = response.headers["content-type"]
if content_type != json_content:
# some calls return empty html documents
if not response.content.strip():
return None
raise DiscourseError(
'Invalid Response, expecting "{0}" got "{1}"'.format(
json_content, content_type
),
response=response,
)
try:
decoded = response.json()
except ValueError:
raise DiscourseError("failed to decode response", response=response)
# Checking "errors" length because
# data-explorer (e.g. POST /admin/plugins/explorer/queries/{}/run)
# sends an empty errors array
if "errors" in decoded and len(decoded["errors"]) > 0:
message = decoded.get("message")
if not message:
message = u",".join(decoded["errors"])
raise DiscourseError(message, response=response)
return decoded
def _request(self, verb, path, params={}, data={}):
"""
Executes HTTP request to API and handles response
Args:
verb: HTTP verb as string: GET, DELETE, PUT, POST
path: the path on the Discourse API
params: dictionary of parameters to include to the API
Returns:
"""
params['api_key'] = self.api_key
if 'api_username' not in params:
params['api_username'] = self.api_username
url = self.host + path
headers = {'Accept': 'application/json; charset=utf-8'}
response = requests.request(verb,
url,
allow_redirects=False,
params=params,
data=data,
headers=headers,
timeout=self.timeout)
log.debug('response %s: %s', response.status_code, repr(response.text))
if not response.ok:
try:
msg = u','.join(response.json()['errors'])
except (ValueError, TypeError, KeyError):
if response.reason:
msg = response.reason
else:
msg = u'{0}: {1}'.format(response.status_code,
response.text)
if 400 <= response.status_code < 500:
raise DiscourseClientError(msg, response=response)
raise DiscourseServerError(msg, response=response)
if response.status_code == 302:
raise DiscourseError(
'Unexpected Redirect, invalid api key or host?',
response=response)
json_content = 'application/json; charset=utf-8'
content_type = response.headers['content-type']
if content_type != json_content:
# some calls return empty html documents
if not response.content.strip():
return None
raise DiscourseError(
'Invalid Response, expecting "{0}" got "{1}"'.format(
json_content, content_type),
response=response)
try:
decoded = response.json()
except ValueError:
raise DiscourseError('failed to decode response',
response=response)
if 'errors' in decoded:
message = decoded.get('message')
if not message:
message = u','.join(decoded['errors'])
raise DiscourseError(message, response=response)
return decoded
