217 lines
8.1 KiB
Python
217 lines
8.1 KiB
Python
from __future__ import unicode_literals
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import sys
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import requests
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import requests_oauthlib
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import logging
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try:
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from urllib.parse import urlunparse # Python3
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except ImportError:
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from urlparse import urlunparse # Python2
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from openphoto.objects import OpenPhotoObject
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from openphoto.errors import *
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from openphoto.config import Config
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if sys.version < '3':
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TEXT_TYPE = unicode
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else:
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TEXT_TYPE = str
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DUPLICATE_RESPONSE = {"code": 409,
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"message": "This photo already exists"}
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class OpenPhotoHttp:
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"""
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Base class to handle HTTP requests to an OpenPhoto server.
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If no parameters are specified, config is loaded from the default
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location (~/.config/openphoto/default).
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The config_file parameter is used to specify an alternate config file.
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If the host parameter is specified, no config file is loaded and
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OAuth tokens (consumer*, token*) can optionally be specified.
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All requests will include the api_version path, if specified.
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This should be used to ensure that your application will continue to work
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even if the OpenPhoto API is updated to a new revision.
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"""
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def __init__(self, config_file=None, host=None,
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consumer_key='', consumer_secret='',
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token='', token_secret='', api_version=None):
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self._api_version = api_version
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self._logger = logging.getLogger("openphoto")
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self.config = Config(config_file, host,
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consumer_key, consumer_secret,
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token, token_secret)
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self.host = self.config.host
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# Remember the most recent HTTP request and response
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self.last_url = None
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self.last_params = None
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self.last_response = None
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def get(self, endpoint, process_response=True, **params):
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"""
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Performs an HTTP GET from the specified endpoint (API path),
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passing parameters if given.
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The api_version is prepended to the endpoint,
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if it was specified when the OpenPhoto object was created.
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Returns the decoded JSON dictionary, and raises exceptions if an
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error code is received.
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Returns the raw response if process_response=False
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"""
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params = self._process_params(params)
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if not endpoint.startswith("/"):
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endpoint = "/" + endpoint
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if self._api_version is not None:
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endpoint = "/v%d%s" % (self._api_version, endpoint)
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url = urlunparse(('http', self.host, endpoint, '', '', ''))
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if self.config.consumer_key:
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auth = requests_oauthlib.OAuth1(self.config.consumer_key,
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self.config.consumer_secret,
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self.config.token,
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self.config.token_secret)
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else:
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auth = None
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with requests.Session() as session:
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response = session.get(url, params=params, auth=auth)
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self._logger.info("============================")
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self._logger.info("GET %s" % url)
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self._logger.info("---")
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self._logger.info(response.text)
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self.last_url = url
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self.last_params = params
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self.last_response = response
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if process_response:
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return self._process_response(response)
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else:
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return response.text
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def post(self, endpoint, process_response=True, files=None, **params):
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"""
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Performs an HTTP POST to the specified endpoint (API path),
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passing parameters if given.
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The api_version is prepended to the endpoint,
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if it was specified when the OpenPhoto object was created.
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Returns the decoded JSON dictionary, and raises exceptions if an
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error code is received.
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Returns the raw response if process_response=False
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"""
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params = self._process_params(params)
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if not endpoint.startswith("/"):
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endpoint = "/" + endpoint
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if self._api_version is not None:
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endpoint = "/v%d%s" % (self._api_version, endpoint)
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url = urlunparse(('http', self.host, endpoint, '', '', ''))
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if not self.config.consumer_key:
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raise OpenPhotoError("Cannot issue POST without OAuth tokens")
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auth = requests_oauthlib.OAuth1(self.config.consumer_key,
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self.config.consumer_secret,
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self.config.token,
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self.config.token_secret)
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with requests.Session() as session:
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if files:
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# Need to pass parameters as URL query, so they get OAuth signed
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response = session.post(url, params=params,
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files=files, auth=auth)
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else:
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# Passing parameters as URL query doesn't work
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# if there are no files to send.
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# Send them as form data instead.
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response = session.post(url, data=params, auth=auth)
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self._logger.info("============================")
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self._logger.info("POST %s" % url)
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self._logger.info("params: %s" % repr(params))
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if files:
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self._logger.info("files: %s" % repr(files))
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self._logger.info("---")
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self._logger.info(response.text)
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self.last_url = url
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self.last_params = params
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self.last_response = response
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if process_response:
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return self._process_response(response)
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else:
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return response.text
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@staticmethod
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def _process_params(params):
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""" Converts Unicode/lists/booleans inside HTTP parameters """
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processed_params = {}
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for key, value in params.items():
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# Extract IDs from objects
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if isinstance(value, OpenPhotoObject):
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value = value.id
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# Ensure value is UTF-8 encoded
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if isinstance(value, TEXT_TYPE):
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value = value.encode("utf-8")
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# Handle lists
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if isinstance(value, list):
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# Make a copy of the list, to avoid overwriting the original
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new_list = list(value)
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# Extract IDs from objects in the list
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for i, item in enumerate(new_list):
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if isinstance(item, OpenPhotoObject):
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new_list[i] = item.id
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# Convert list to string
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value = ','.join([str(item) for item in new_list])
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# Handle booleans
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if isinstance(value, bool):
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value = 1 if value else 0
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processed_params[key] = value
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return processed_params
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@staticmethod
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def _process_response(response):
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"""
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Decodes the JSON response, returning a dict.
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Raises an exception if an invalid response code is received.
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"""
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try:
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json_response = response.json()
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code = json_response["code"]
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message = json_response["message"]
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except (ValueError, KeyError):
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# Response wasn't OpenPhoto JSON - check the HTTP status code
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if 200 <= response.status_code < 300:
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# Status code was valid, so just reraise the exception
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raise
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elif response.status_code == 404:
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raise OpenPhoto404Error("HTTP Error %d: %s" %
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(response.status_code, response.reason))
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else:
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raise OpenPhotoError("HTTP Error %d: %s" %
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(response.status_code, response.reason))
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if 200 <= code < 300:
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return json_response
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elif (code == DUPLICATE_RESPONSE["code"] and
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DUPLICATE_RESPONSE["message"] in message):
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raise OpenPhotoDuplicateError("Code %d: %s" % (code, message))
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else:
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raise OpenPhotoError("Code %d: %s" % (code, message))
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def result_to_list(result):
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""" Handle the case where the result contains no items """
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if not result:
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return []
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if result[0]["totalRows"] == 0:
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return []
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else:
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return result
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