Davvy: Django, WebDAV e (pessimo) stato dell'arte

My talk at Italian Pycon SEI (2015).

Transcript

1. DAVVY
 DJANGO, WEBDAV E
 (PESSIMO) STATO DELL'ARTE Adriano Di Luzio Sabato 18 Aprile 2015 - Firenze - PYCONSEI
2. ABOUT ME Software Developer - Unbit, Roma Studente - Informatica Magistrale @ Sapienza www.github.com/aldur www.twitter.com/AdrianoDiLuzio 2
3. DAVVY: IL SOGNO 3 WebDAV
4. WEBDAV: WHAT? • Web Distributed Authoring and Versioning [1] • Estensione di HTTP • Il web - medium per lettura e scrittura 4 [1] rfc4918
5. WEBDAV: WHO? Apple (OS X & iOS clients) Google (Android Calendars, Contacts) E molte altre implementazioni. 5
6. WEBDAV: HOW? 6 HTTP / WebDAV Request PROPFIND (XML) HTTP / WebDAV Response PROPFIND (XML) HTTP / WebDAV Request MKCOL …
7. HAI DETTO XML? <D:prop  xmlns:D='DAV:'><author                            xml:lang='en'                            xmlns:x='http://example.com/ns'                            xmlns='http://example.com/ns'                            xmlns:h='http://www.w3.org/1999/xhtml'>                    <x:name>Jane  Doe</x:name>                    <x:uri  added="2005-­‐11-­‐26"  type="email"                        >mailto:jane.doe@example.com</x:uri>                    <x:uri  added="2005-­‐11-­‐27"  type="web"                        >http://www.example.com</x:uri>                    <x:notes>                        Jane  has  been  working  way  <h:em>too</h:em>  long  on  the                        long-­‐awaited  revision  of  &lt;RFC2518&gt;.                    </x:notes>                </author>            </D:prop> 7
8. XML & HTTP: RICHIESTA PROPFIND  /container/  HTTP/1.1   Host:  www.example.com   Content-­‐Type:  application/xml;  charset="utf-­‐8"   Content-­‐Length:  xxxx   <?xml  version="1.0"  encoding="utf-­‐8"  ?>   <propfind  xmlns="DAV:">          <propname/>   </propfind> 8
9. XML & HTTP: RISPOSTA HTTP/1.1  207  Multi-­‐Status   Content-­‐Type:  application/xml;  charset="utf-­‐8"   Content-­‐Length:  xxxx   <?xml  version="1.0"  encoding="utf-­‐8"  ?>   <multistatus  xmlns="DAV:">      <response>          <href>http://www.example.com/container/</href>          <propstat>              <prop  xmlns:R="http://ns.example.com/boxschema/">                  <R:author/>                  <creationdate/>                  <displayname/>                  <resourcetype/>              </prop>              <status>HTTP/1.1  200  OK</status>          </propstat>      </response>   <!-­‐-­‐  ...  -­‐-­‐>     </multistatus> 9
10. Template DJANGO & DAVVY Architettura e paradigmi 10 Model View
11. DJANGO & DAVVY Architettura e paradigmi 10 Model View
12. Storage DJANGO & DAVVY Architettura e paradigmi 10 Model View
13. Storage DJANGO & DAVVY Architettura e paradigmi 10 Model View Properties XML → WebDAV Model → XML Resources Collections
14. DAVVY: DETTAGLI • Python 2 / Python 3. • Estendibile a piacimento (Class-View based) • Condivisione / protezione delle risorse. 11
15. DAVVY: SET-UP #  settings.py   DAVVY_STORAGE_PATH  =  '/var/www/davvy' 12 #  urls.py   from  davvy.base  import  WebDAV   from  davvy.addressbook  import  CardDAV   from  davvy.calendar  import  CalDAV   urlpatterns  =  patterns('',          url(r'^principals/(\w+)/(.*)',  WebDAV.as_view(root='storage')),          url(r'^storage/(\w+)/(.*)',  WebDAV.as_view(root='storage')),          url(r'^addressbook/(\w+)/(.*)',  CardDAV.as_view(root='addressbook001')),          url(r'^calendars/(\w+)/(.*)',  CalDAV.as_view(root='calendars')),          url(r'^admin/',  include(admin.site.urls)),   )
16. DAVVY: CUSTOMDAV 13 class  CustomDAV(WebDAV):        def  __init__(self,  **kwargs):                  self.http_method_names  =  WebDAV.http_method_names  +  \                          ['custom']                  super(CalDAV,  self).__init__(**kwargs)   
      def  propfind(self,  request,  user,  resource_name):                  return  super(CalDAV,  self).propfind(   request,  user,  resource_name,  shared=True)        def  put(self,  request,  user,  resource_name):                return  super(CalDAV,  self).put(request,  user,  resource_name)        #  […]        def  custom(self,  request,  user,  resource_name):                #  A  custom  HTTP/WebDAV  method!                pass  
17. LO STATO DELL’ARTE L’INCUBO: I CLIENT 14 OS X Calendar Mozilla Thunderbird
18. OS X CALENDAR • Homesets Autodiscovery • Richieste volanti (PROPFIND /) • .well-known/{caldav, carddav} 15
19. MOZILLA THUNDERBIRD 1. Nessun supporto out-of-the-box. 2. Lightning Calendar Extension. 3. Nessun supporto i’ll-build-the-box. 16
20. I CLIENT: ROUND II 17 OS X Contacts Mozilla Thunderbird
 +
 SOGo
21. I CLIENT: ROUND III 18 OS X Finder Transmit
22. SENZA FINE! 19
23. E NON SIAMO GLI UNICI! sabre/dav 20 owncloud radicale milton
24. L’ALTERNATIVA https://github.com/unbit/spockfs 21
25. CONCLUSIONI • Abbiamo imparato molto… • …soprattutto a stare lontani da WebDAV! • Nonostante questo, Davvy funziona! • Almeno fino al prossimo giro di client. 22
26. GRAZIE PER L’ATTENZIONE.
 DOMANDE? 23 https://github.com/unbit/davvy/
27. CREDITI RISORSE GRAFICHE • http://www.kameleon.pics/ • http://icons8.com/ 24