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mod_pubsub_post/README.markdown @ 3506:7b1eede1a840

mod_pubsub_post/README: Set stage label to stable Used in production for quite some time
author Kim Alvefur <zash@zash.se>
date Sat, 30 Mar 2019 23:37:17 +0100
parent 3505:106b4ae4469b
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1 ---
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2 labels:
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3 - 'Stage-Stable'
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4 summary: Publish to PubSub nodes from via HTTP POST/WebHooks
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5 ---
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6
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7 # Introduction
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8
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9 This module is a fairly generic WebHook receiver that lets you easily
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10 publish data to PubSub using a HTTP POST request. The payload can be
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11 Atom feeds, arbitrary XML, or arbitrary JSON. The type should be
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12 indicated via the `Content-Type` header.
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13
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14 ``` {.bash}
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15 curl http://localhost:5280/pubsub_post/princely_musings \
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16 -H "Content-Type: application/json" \
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17 --data-binary '{"musing":"To be, or not to be: that is the question"}'
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18 ```
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19
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20 - JSON data is wrapped in a [XEP-0335] container.
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21 - An Atom feed may have many `<entry>` and each one is published as
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22 its own PubSub item.
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23 - Other XML is simply published to a randomly named item as-is.
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24
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25 # Configuration
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26
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27 All settings are optional.
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28
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29 ## Actor identification
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30
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31 First we have to figure out who is making the request.
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32 This is configured on a per-node basis like this:
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33
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34 ``` {.lua}
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35 -- Per node secrets
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36 pubsub_post_actors = {
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37 princely_musings = "hamlet@denmark.lit"
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38 }
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39 pubsub_post_default_actor = "nobody@nowhere.invalid"
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40 ```
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41
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42 `pubsub_post_default_actor` is used when trying to publish to a node
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43 that is not listed in `pubsub_post_actors`. Otherwise the IP address
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44 of the connection is used.
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45
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46 ## Authentication
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47
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48 [WebSub](https://www.w3.org/TR/2018/REC-websub-20180123/) [Authenticated
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49 Content
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50 Distribution](https://www.w3.org/TR/2018/REC-websub-20180123/#authenticated-content-distribution)
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51 authentication is used.
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52
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53 ``` {.lua}
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54 pubsub_post_secrets = {
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55 princely_musings = "shared secret"
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56 }
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57 pubsub_post_default_secret = "default secret"
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58 ```
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59
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60 `pubsub_post_default_secret` is used when trying to publish to a node
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61 that is not listed in `pubsub_post_secrets`. Otherwise the request
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62 proceeds with the previously identified actor.
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63
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64 ::: {.alert .alert-danger}
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65 If configured without a secret and a default actor that has permission
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66 to create nodes the service becomes wide open.
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67 :::
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68
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69 ## Authorization
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70
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71 Authorization is handled via pubsub affiliations. Publishing requires an
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72 affiliation with the _publish_ capability, usually `"publisher"`.
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73
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74 ### Setting up affiliations
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75
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76 Prosodys PubSub module supports [setting affiliations via
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77 XMPP](https://xmpp.org/extensions/xep-0060.html#owner-affiliations), in
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78 trunk since [revision
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79 384ef9732b81](https://hg.prosody.im/trunk/rev/384ef9732b81), so
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80 affiliations can be configured with a capable client.
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81
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82 It can however be done from another plugin:
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83
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84 ``` {.lua}
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85 local mod_pubsub = module:depends("pubsub");
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86 local pubsub = mod_pubsub.service;
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87
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88 pubsub:create("princely_musings", true);
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89 pubsub:set_affiliation("princely_musings", true, "127.0.0.1", "publisher");
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90 ```