Spot any errors? let me know, but Unleash your pedant politely please.

Saturday, 22 September 2012

iPhone 5

There seem to be two takes on the iPhone 5. One from the people who 'get' Apple (Gruber, Siegler et al) is that it's the best iPhone yet and we should all upgrade as soon as we can.  The other is that it's boring and disappointing and the most valuable company in the history of the world has seriously lost its mojo.

The truth is that it's a significant evolutionary release that I'd buy now if the cost meant nothing to me.  I've owned four phones in 15 years. I bought the first one because my wife was pregnant. I bought the second one because I was curious about bluetooth, it was second hand and it was similar to price of a replacement battery for the first phone.  I bought the third one because the second had been stolen and I was between jobs, so needed to be available to take calls from agents.

I bought the iPhone 4 because my iPod Touch (bought when my original 5GB iPod developed a fault after 7 years)  had taught me that a phone keypad was the wrong way to type on a handheld device, and, well, because I wanted one.

This hopefully establishes that I don't have a history of buying/replacing gadgets on a whim.  That hasn't changed with the iPhone 5.

As an iPhone 4 user/owner, it used to puzzle me that I'd still see people apparently happy with their inferior older model iPhones.  This no longer puzzles me at all.  I now understand that they didn't feel the need to upgrade because their 'old' phones simply didn't feel in any way broken to them.  That's exactly how I feel about the 4.  It's still an awesome device. It's not in anyway broken.

I wonder what the 5S/6 will be like next year?


Friday, 14 September 2012

Joined up something

Following on from openpyxl win, I had, or at least found, more a little more spare time between writing tests to work a little more on producing progress reports from Excel files.

The thing that triggered this was discovering that Project Place, the document/project repository we use has an API. I thought I'd do a little digging.  I thought it would be cool not just to produce a report from the files, but to fetch the files automatically first.

I should state that the people at Project Place were great, and didn't give me any grief for being a total n00b at this kind of thing.

Initially, using a browser based client to run examples, it all looked pretty simple…

I decided to stick with Python rather than add another layer of unnecessary learning. The first hurdle was OAUTH. I gave up for a few days, but it kept bugging me, so I read more, understood more and managed to get through the Oauth process. The following code is pretty much the same as examples on the available online. There's a slight tweak to disable SSL certificate validation. It's probably not the right thing to do, and you may not need it (I didn't on OS-X on ADSL, but it worked around a problem on Windows on a corporate network through a firewall). The other differences are that oath properties are read from and written to a Java style properties file.

import urlparse
import local_oauth2 as oauth
import json
from Properties import Properties

consumer_properties = Properties('consumer.properties')

request_token_url = 'https://api.projectplace.com/initiate'
access_token_url  = 'https://api.projectplace.com/token'
authorize_url     = 'https://api.projectplace.com/authorize'

consumer = oauth.Consumer(consumer_properties.property('Key'),
                          consumer_properties.property('Secret'))

client = oauth.Client(consumer=consumer,
                      disable_ssl_certificate_validation=True)

# Step 1: Get a request token. This is a temporary token that is used for 
# having the user authorize an access token and to sign the request to obtain 
# said access token.

resp, content = client.request(request_token_url, "GET")
#print 'Response:',resp
#print 'Content:',content
if resp['status'] != '200':
    raise Exception("Invalid response %s." % resp['status'])

request_token = dict(urlparse.parse_qsl(content))

#print "Request Token:"
#print "    - oauth_token        = %s" % request_token['oauth_token']
#print "    - oauth_token_secret = %s" % request_token['oauth_token_secret']
#print 

# Step 2: Redirect to the provider. Since this is a CLI script we do not 
# redirect. In a web application you would redirect the user to the URL
# below.

print "Go to the following link in your browser:"
print "%s?oauth_token=%s" % (authorize_url, request_token['oauth_token'])
print 

# After the user has granted access to you, the consumer, the provider will
# redirect you to whatever URL you have told them to redirect to. You can 
# usually define this in the oauth_callback argument as well.
accepted = 'n'
while accepted.lower() != 'y':
    accepted = raw_input('Have you authorized me? (y/n) ')
oauth_verifier_url = raw_input('What is the URL that you were redirected to? ')

oauth_verifier = oauth_verifier_url.split("&oauth_verifier=")[-1]

#print "oauth_verifier:%s"%oauth_verifier

# Step 3: Once the consumer has redirected the user back to the oauth_callback
# URL you can request the access token the user has approved. You use the 
# request token to sign this request. After this is done you throw away the
# request token and use the access token returned. You should store this 
# access token somewhere safe, like a database, for future use.
token = oauth.Token(request_token['oauth_token'],
                    request_token['oauth_token_secret'])
                    
token.set_verifier(oauth_verifier)
client = oauth.Client(consumer = consumer,
                      token    = token,
                      disable_ssl_certificate_validation=True)

resp, content = client.request(access_token_url, "POST")
access_token = dict(urlparse.parse_qsl(content))

resp, content = client.request(request_token_url, "GET")
#print 'Response:',resp
#print 'Content:',content
#print 'Access Token:',access_token

#print "Access Token:"
#print "    - oauth_token        = %s" % access_token['oauth_token']
#print "    - oauth_token_secret = %s" % access_token['oauth_token_secret']
#print
#print "You may now access protected resources using user_access.properties." 
#print

user_access_properties=file('user_access.properties','w')
user_access_properties.write('Key    : %s\n'%access_token['oauth_token'])
user_access_properties.write('Secret : %s'%access_token['oauth_token_secret'])
user_access_properties.close()

local_oauth2 is pretty much the same as python-oauth2, but with the addition of the disable_ssl_certificate_validation parameter...

    def __init__(self,
                 consumer,
                 token=None,
                 cache=None,
                 timeout=None,
                 proxy_info=None,
                 disable_ssl_certificate_validation=False):

        if consumer is not None and not isinstance(consumer, Consumer):
            raise ValueError("Invalid consumer.")

        if token is not None and not isinstance(token, Token):
            raise ValueError("Invalid token.")

        self.consumer = consumer
        self.token = token
        self.method = SignatureMethod_HMAC_SHA1()

        httplib2.Http.__init__(self,
                               cache=cache,
                               timeout=timeout, 
                               proxy_info=proxy_info,
                               disable_ssl_certificate_validation=disable_ssl_certificate_validation)

The Project Place class, which is still a work in progress, and certainly not fully tested, looks like this:

#!/usr/bin/env python
# encoding: utf-8
"""
TalkToProjectPlace.py

Created by Hywel Thomas on 2012-07-19.
Copyright (c) 2012 Jupiterlink Limited. All rights reserved.
"""

#import sys
#import os
import local_oauth2 as oauth
import json

class BadValue(Exception):
    def __init__(self, message):
        self.message = message
        
    def __str__(self):
        return self.message

class BadParameterCombination(Exception):
    def __init__(self, message):
        self.message = message
        
    def __str__(self):
        return self.message

class ContainerNotFound(Exception):
    def __init__(self, message):
        self.message = message
        
    def __str__(self):
        return self.message
        
class NotImplemented(Exception):
    def __init__(self, message):
        self.message = message
        
    def __str__(self):
        return self.message

class ProjectPlace(object):

    def __init__(self,
                 consumer_key,
                 consumer_secret,
                 access_token_key,
                 access_token_secret,
                 format='json',
                 proxy_info = None,
                 disable_ssl_certificate_validation = False):

        self.consumer_key        = consumer_key
        self.consumer_secret     = consumer_secret
        self.access_token_key    = access_token_key
        self.access_token_secret = access_token_secret
        
        self.baseURL = "https://api.projectplace.com/1/"
        self.format=format     

        consumer = oauth.Consumer(key=consumer_key,
                                       secret=consumer_secret)
        access_token = oauth.Token(key=access_token_key, 
                                        secret=access_token_secret)
    
        self.client = oauth.Client(consumer   = consumer,
                                   token      = access_token,
                                   proxy_info = proxy_info,
                                   disable_ssl_certificate_validation = disable_ssl_certificate_validation) 


    def request(self, request, **parameters):
        
        full_request = u'%s%s.%s'%(self.baseURL,request,self.format)
        
        if len(parameters)>0:
            full_request="%s&%s"%(full_request,"&".join(['%s=%s'%(parameter,parameters[parameter]) for parameter in parameters]))

        resp, content = self.client.request(uri=full_request,
                                            method='GET')
        if resp['status']=='200':
            return content
        else:
            print '\n\n'
            print content
            return resp


    def request_binary(self,request):
        fullRequest = u'%s%s'%(self.baseURL,request)
        resp, content = self.client.request(fullRequest)

        if resp['status']=='200':
            return content
        else:
            print '\n\n'
            return resp

    # USER methods
    
    def user_profile(self,user_id='me'):
        return self.request('user/%s/profile'%user_id)
        
    def user_coworkers(self,user_id='me'):
        return self.request('user/%s/coworkers'%user_id)
        
    def user_favorite_coworkers(self,user_id='me'):
        return self.request('user/%s/favorite-coworkers'%user_id)
        
    def user_favourite_coworkers(self,user_id='me'):
        return self.user_favorite_coworkers(user_id)  
    
    def user_projects(self,user_id='me'):
        return self.request('user/%s/projects'%user_id)
        
    def user_favorite_projects(self,user_id='me'):
        return self.request('user/%s/favorite-projects'%user_id)
        
    def user_favourite_projects(self,user_id='me'):
        return self.user_favorite_projects(user_id)
               
    def user_recent_documents(self,user_id='me'):
        return self.request('user/%s/recent-documents'%user_id)
        
    def user_avatar(self, user_id):
        # TODO - think that this request should not go through 
        # the authenticated service. Get a 401 error.
        return self.request_binary('avatar/%s/%s'%(user_id,self.access_token_key))

    def user_assignments(self,user_id='me'):
        return self.request('user/%s/assignments'%user_id)
        
    def latest_user_conversations(self,user_id='me',complete=None,count=None):
        request = 'user/%s/conversations'%user_id
        parameters={}
        if complete:
            parameters['complete'] = complete
        if count:
            parameters['count'] = count
        return self.request(request, **parameters)
        
         
    def user_document_feed(self,user_id='me'):
        return self.request('user/%s/document-feed'%user_id)
        
    def project_members_list(self,project_id):
        # Currently getting a 403
        return self.request('project/%s/members'%project_id)        


    def document_comments(self,document_id):
        #todo: figure out how to POST
        return self.request('document/%s/comments'%document_id)  

    def document_properties(self,document_id):
        #todo: figure out how to POST
        return self.request('document/%s/properties'%document_id)    

    def document_touch(self,document_id):
        #todo: figure out how to POST
        return self.request('document/%s/touch'%document_id)        
        
    def document_upload(self, document_container_id, document, **kwargs):
        document_container = document_container_contents()
        #todo: figure out how to POST
        raise NotImplemented('document_upload to Project Place has not yet been implemented')    
         
    def document_download(self, document_id, destination_filename=None, version=None):
        request = 'document/%s'%document_id
        parameters={}
        if version:
            parameters['version'] = version
        document = self.request(request, **parameters)
        if destination_filename:
            destination_file = open(destination_filename, 'wb')
            destination_file.write(document)
            destination_file.close()
        return document


    def document_versions(self,document_id):
        return self.request('document/%s/versions'%document_id) 
          
    def document_version_properties(self,document_id,version_id):
        #TODO POST
        return self.request('document/%s/versions/%s/properties'%(document_id,version_id))    
        
                        
        
    def document_container_contents(self,document_container_id=None,project_id=None):
        if document_container_id:
            return self.request('document-container/%s/contents'%document_container_id)
        elif project_id:
            return self.request('project/%s/documents'%project_id)
        else:
            raise BadValue('document_container_contents requires a document-container-id or project-id parameter')



    def project_conversations(self,
                              project_id,
                              older_than=None,
                              newer_than=None):
        request='project/%s/conversations'%project_id
        parameters={}
        if older_than and not newer_than:
            parameters['older_than'] = older_than 
        if newer_than and not older_than:
            parameters['newer_than'] = newer_than 
        return self.request(request,**parameters)
            
        
    def project_logotype(self, project_id):
        # TODO - think that this request should not go through 
        # the authenticated service. Get a 401 error.
        return self.request_binary('project-logotype/%s/%s'%(project_id,self.access_token_key))


    
    #---------
    # Higher order methods
    def project_id(self,
                   project_name,
                   user_id='me'):
        projects=json.loads(self.user_projects(user_id))
        for project in projects:
            if project['name']==project_name:
                return project['id']
                
   
    def container_id_at_path(self,
                             project_name,
                             path,
                             user_id='me'):
        
        #print 'in container_id_at_path'
        project_id=self.project_id(project_name = project_name,
                                      user_id      = user_id)
        #print "Project-ID:",project_id
        containers=self.containers(json.loads(self.document_container_contents(project_id=project_id)))
        for target_container_name in path:
            next_container = None
            for container in containers:
                 if container['name']==target_container_name:
                     next_container=container['id']
            if next_container:
                containers=self.containers(json.loads(self.document_container_contents(document_container_id=next_container)))
            else:
                raise ContainerNotFound('A container called "%s" was not found'%target_container_name)
        return next_container
            
            
    def containers(self,document_container_contents):
        return document_container_contents["containers"]

            
    def documents(self,document_container_contents):
        return document_container_contents['documents']
        
        

       
    def container_structure(self,
                            document_container_id=None,
                            container_name=None,
                            project_name=None,
                            user_id="me"):
        """
        Supply either a document_container_id if starting from a known container,
        or the project_name (and optionaly a user_id), if starting from the project
        root container.
        The method returns a nested list matching the container structure. This does
        not include files. Each node is a dictionary of 'name';'id' and 'containers'.
        """
        """the 'containters' returned in document_containter_contents looks like:
       
                    {u'container_count': 0,
                     u'name': u'f2',
                     u'versioned': True,
                     u'color': u'yellow', 
                     u'id': 707070707, 
                     u'document_count': 0}
            
           we want to add the document_containter_contents here in a new field called
           'contents'. This is done recursively to give us the whole nested structure.
           It's probably wise not to call this against a large structure (i.e. use
           container_id_at_path first)
        """
        if document_container_id and project_name:
            raise BadParameterCombination('Only one of document_container_id and project_name should be supplied to the ProjectPlace.container_structure method, not both')
        
        elif not document_container_id and not project_name:
            raise BadParameterCombination('At least one of document_container_id and project_name should be supplied to the ProjectPlace.container_structure method.')
        
        elif project_name and not document_container_id:
            project_id=self.project_id(project_name = project_name,
                                       user_id      = user_id)
            container_structure=json.loads(self.document_container_contents(project_id=project_id))
            container_structure['name']=project_name
            
        elif container_name: # document_container_id and not project_name:
            container_structure=json.loads(self.document_container_contents(document_container_id=document_container_id))
            container_structure['name']=container_name
            
        else:
            raise BadParameterCombination('A container_name must be supplied to the ProjectPlace.container_structure method when document_container_id is the parameter')

        for container in container_structure['containers']:
            container[u'contents']=self.container_structure(document_container_id=container[u'id'],
                                                            container_name=container[u'name'],
                                                            user_id=user_id)
                                                                                          
        return container_structure
       


I've not had any luck with POST,  mainly due to not having in-depth understanding of http and the oath package.  Hints would be most welcome!