Mercurial > prosody-modules

annotate mod_push2/push2.markdown @ 5819:bb51cf204dd4 default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
mod_sasl_ssdp: Fix event name so legacy SASL works correctly (thanks Martin!)
author Matthew Wild <mwild1@gmail.com>
date Tue, 09 Jan 2024 13:50:18 +0000
parents a1d22d6efb3d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
5659
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
1 # Push 2.0
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
2
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
3 Adapted from notes made at [XMPP Summit 25](https://pad.nixnet.services/oy6MKVbESSycLeMJIOh6zw).
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
4
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
5 Requirements:
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
6
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
7 - Support for SASL2 inlining
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
8 - Extensible stanza matching rules and notification payload rules
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
9 - Simpler syntax and concept model than original specification
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
10
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
11 ## Client registers to receive push notifications
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
12
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
13 ```xml
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
14 <enable xmlns='urn:xmpp:push2:0'>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
15 <service>pusher@push.example.com</service>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
16 <client>https://push.example.com/adlfkjadafdasf</client>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
17 <match profile="urn:xmpp:push2:match:archived-with-body">
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
18 <send xmlns="urn:xmpp:push2:send:notify-only:0"/>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
19 </match>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
20 </enable>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
21 ```
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
22
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
23 The `<service/>` element contains a JID which push notifications for this client will be sent to. It may be a host, bare or full JID.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
24
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
25 The `<client/>` element contains an opaque string that will be included in all communication with the push service. It may be used to convey client identifiers used by the push notification service to route notifications.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
26
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
27 The `<match/>` and `<send/>` elements define what profiles to use for matching stanzas and sending notifications. These are described later in this document.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
28
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
29 ## Match and send profiles
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
30
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
31 Different clients and push services have different requirements for push notifications, often due to the differing capabilities of target platforms.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
32
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
33 A "profile" in the context of this specification is a set of rules for matching the kinds of stanzas that should be pushed, and how to transform them before sending the notification to the push service.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
34
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
35 ### Match profiles
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
36
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
37 Match profiles define which incoming stanzas will trigger a push notification. More than one match may be specified.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
38
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
39 Some match profiles are defined in this XEP. Other XEPs may define additional profiles with the reserved `urn:xmpp:push2:match:` prefix, following the registrar considerations explained later in this document. Custom profiles not defined in a XEP should use their own appropriate URI.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
40
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
41 #### `urn:xmpp:push2:match:all`
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
42
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
43 Using this profile, all stanzas will trigger a push notification to be sent to the push service when the client is unavailable.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
44
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
45 #### `urn:xmpp:push2:match:important`
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
46
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
47 Stanzas that are considered to be "important" are pushed. At the time of writing, there is no standard definition of "important", however most servers already contain such logic for traffic optimization when combined with [XEP-0352: Client State Indication](https://xmpp.org/extensions/xep-0352.html).
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
48
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
49 #### `urn:xmpp:push2:match:archived`
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
50
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
51 Push notifications will be sent for any stanza that is stored in the user's archive. This is a good indication that the stanza is important, and is desired on all of a user's devices.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
52
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
53 #### `urn:xmpp:push2:match:archived-with-body`
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
54
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
55 Matches only archived messages that contain a body. This can be used to exclude certain message types, such as typing notifications, receipts and error replies.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
56
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
57 ### Send profiles
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
58
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
59 When a server has determined that a stanza should trigger a push notification (according to the client's selected 'match' profile), it proceeds to create a notification stanza following the send profiles specified in the match profiles which match this stanza.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
60
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
61 After constructing the notification stanza, it will then be sent to the push service JID selected by the client.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
62
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
63 Some send profiles are defined in this XEP. Other XEPs may define additional profiles with the `urn:xmpp:push2:send:` prefix, following the registrar considerations explained later in this document. Custom profiles not defined in a XEP should use their own appropriate URI.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
64
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
65 #### `urn:xmpp:push2:send:notify-only:0`
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
66
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
67 Send an empty notification to the push service. Such notifications are useful if a push notification can trigger the client to "wake up" and connect to the server to receive the message over XMPP.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
68
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
69 Example:
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
70
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
71 ```xml
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
72 <message to="pusher@push.example.net">
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
73 <notification xmlns="urn:xmpp:push2:0">
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
74 <client>https://push.example.com/adlfkjadafdasf</client>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
75 <priority>normal</priority>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
76 </notification>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
77 </message>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
78 ```
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
79
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
80 #### `urn:xmpp:push2:send:sce+rfc8291+rfc8292:0`
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
81
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
82 Delivers content encrypted according to RFC8291 and with a JWT auth following RFC8292
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
83
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
84 ```xml
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
85 <send xmlns="urn:xmpp:push2:send:sce+rfc8291+rfc8292:0">
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
86 <ua-public>Base64 encoded P-256 ECDH public key (raw, uncompressed)</ua-public>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
87 <auth-secret>Base64 encoded randomly generated 16 octets</auth-secret>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
88 <jwt-alg>ES256</jwt-alg>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
89 <jwt-key>PKCS#8 PEM encoded ECDSA keypair, without the header or footer lines</jwt-key>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
90 <jwt-claim name="aud">https://push.example.com</jwt-claim>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
91 </send>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
92 ```
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
93
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
94 The full stanza is wrapped in XEP-0297 forwarded and then that is wrapped in XEP-0420 envelope/content with optional rpad. The raw bytes of the resulting XML are encrypted according to RFC8291 using the provided `ua-public` and `auth-secret`.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
95
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
96 If `jwt-alg` is specified, then a JWT is computed over any provided claims plus a suitable `exp` and `sub` claim and signed using the provided key.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
97
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
98 Then a notification is sent:
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
99
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
100 ```xml
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
101 <message to="pusher@push.example.net">
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
102 <notification xmlns="urn:xmpp:push2:0">
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
103 <client>https://push.example.com/adlfkjadafdasf</client>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
104 <priority>normal</priority>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
105 <encrypted xmlns="urn:xmpp:sce:rfc8291:0">
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
106 <payload>Base64 encoded ciphertext</payload>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
107 </encrypted>
5663
a1d22d6efb3d mod_push2: Need to include the public key with the JWT
Stephen Paul Weber <singpolyma@singpolyma.net>
parents: 5659
diff changeset
108 <jwt key="base64 encoded raw public key">the signed JWT, if present</jwt>
5659
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
109 </notification>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
110 </message>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
111 ```
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
112
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
113 NOTE: if the stanza exceeds the maximum size of 4096 bytes (and some implementations may wish to restrict this even more) the stanza may have some elements removed, body truncated, etc before it is delivered. Servers SHOULD ensure that at least the MAM id (if there is one) is still present after any minimization.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
114
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
115 ## Discovering support
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
116
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
117 A server that supports this protocol MUST advertise the `urn:xmpp:push2:0` feature in an account's service discovery information, along with the supported match and send profiles.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
118
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
119 ```xml
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
120 <iq from='juliet@capulet.lit'
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
121 to='juliet@capulet.lit/balcony'
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
122 id='disco1'
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
123 type='result'>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
124 <query xmlns='http://jabber.org/protocol/disco#info'>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
125 <identity category='account' type='registered'/>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
126 <feature var='urn:xmpp:push2:0'/>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
127 <feature var='urn:xmpp:push2:send:'/>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
128 </query>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
129 </iq>
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
130 ```
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
131
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
132 ## Push service interactions
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
133
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
134 ### Transient delivery errors
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
135
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
136 The user's server might receive delivery errors while sending notifications to the user's push service. The error 'type' attribute SHOULD be honoured - errors of type 'wait' SHOULD be retried in an appropriate manner (e.g. using exponential back-off algorithm, up to a limit), discarding the notification after an appropriate length of time or number of attempts.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
137
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
138 Other error types MUST NOT be automatically retried.
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
139
4d1a3de56c3d Initial work on Push 2.0
Stephen Paul Weber <singpolyma@singpolyma.net>
parents:
diff changeset
140 A user's server MAY automatically disable a push configuration for a service that has consistently failed to relay notifications for an extended period of time. This period is a matter of deployment configuration, but a default no less than 72 hours is recommended.