Add support for making an idempotent POST. This allows retrying a POST that was interrupted. It involves creating a post once only (poe) url /rest/data/<class>/@poe/<random_token>. This url acts the same as a post to /rest/data/<class>. However once the @poe url is used, it can't be used for a second POST. To make these changes: 1) Take the body of post_collection into a new post_collection_inner function. Have post_collection call post_collection_inner. 2) Add a handler for POST to rest/data/class/@poe. This will return a unique POE url. By default the url expires after 30 minutes. The POE random token is only good for a specific user and is stored in the session db. 3) Add a handler for POST to rest/data/<class>/@poe/<random token>. The random token generated in 2 is validated for proper class (if token is not generic) and proper user and must not have expired. If everything is valid, call post_collection_inner to process the input and generate the new entry. To make recognition of 2 stable (so it's not confused with rest/data/<:class_name>/<:item_id>), removed @ from Routing::url_to_regex. The current Routing.execute method stops on the first regular expression to match the URL. Since item_id doesn't accept a POST, I was getting 405 bad method sometimes. My guess is the order of the regular expressions is not stable, so sometime I would get the right regexp for /data/<class>/@poe and sometime I would get the one for /data/<class>/<item_id>. By removing the @ from the url_to_regexp, there was no way for the item_id case to match @poe. There are alternate fixes we may need to look at. If a regexp matches but the method does not, return to the regexp matching loop in execute() looking for another match. Only once every possible match has failed should the code return a 405 method failure. Another fix is to implement a more sophisticated mechanism so that @Routing.route("/data/<:class_name>/<:item_id>/<:attr_name>", 'PATCH') has different regexps for matching <:class_name> <:item_id> and <:attr_name>. Currently the regexp specified by url_to_regex is used for every component. Other fixes: Made failure to find any props in props_from_args return an empty dict rather than throwing an unhandled error. Make __init__ for SimulateFieldStorageFromJson handle an empty json doc. Useful for POSTing to rest/data/class/@poe with an empty document. Testing: added testPostPOE to test/rest_common.py that I think covers all the code that was added. Documentation: Add doc to rest.txt in the "Client API" section titled: Safely Re-sending POST". Move existing section "Adding new rest endpoints" in "Client API" to a new second level section called "Programming the REST API". Also a minor change to the simple rest client moving the header setting to continuation lines rather than showing one long line.

import os, shutil, unittest

from .db_test_base import config


class SessionTest(object):
    def setUp(self):
        # remove previous test, ignore errors
        if os.path.exists(config.DATABASE):
            shutil.rmtree(config.DATABASE)
        os.makedirs(config.DATABASE + '/files')
        self.db = self.module.Database(config, 'admin')
        self.sessions = self.db.getSessionManager()
        self.otks = self.db.getOTKManager()

    def tearDown(self):
        if hasattr(self, 'db'):
            self.db.close()
        if os.path.exists(config.DATABASE):
            shutil.rmtree(config.DATABASE)

    def testList(self):
        self.sessions.list()
        self.sessions.set('random_key', text='hello, world!')
        self.sessions.list()

    def testGetAll(self):
        self.sessions.set('random_key', text='hello, world!')
        self.assertEqual(self.sessions.getall('random_key'),
            {'text': 'hello, world!'})

    def testDestroy(self):
        self.sessions.set('random_key', text='hello, world!')
        self.assertEquals(self.sessions.getall('random_key'),
            {'text': 'hello, world!'})
        self.sessions.destroy('random_key')
        self.assertRaises(KeyError, self.sessions.getall, 'random_key')

    def testSetSession(self):
        self.sessions.set('random_key', text='hello, world!')
        self.assertEqual(self.sessions.get('random_key', 'text'),
            'hello, world!')

    def testUpdateSession(self):
        self.sessions.set('random_key', text='hello, world!')
        self.assertEqual(self.sessions.get('random_key', 'text'),
            'hello, world!')
        self.sessions.set('random_key', text='nope')
        self.assertEqual(self.sessions.get('random_key', 'text'), 'nope')