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annotate mod_pubsub_post/README.markdown @ 4509:16995e7624f0

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mod_http_upload_external: add access control option
author Nicolas Cedilnik <nicoco@nicoco.fr>
date Sun, 14 Mar 2021 17:19:38 +0100
parents a6db99c1420a
children c87181a98f29
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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 - JSON data is wrapped in a [XEP-0335] container.
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15 - An Atom feed may have many `<entry>` and each one is published as
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16 its own PubSub item.
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17 - Other XML is simply published to a randomly named item as-is.
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19 ## JSON example
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20
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21 ``` {.bash}
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22 curl http://localhost:5280/pubsub_post/princely_musings \
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23 -H "Content-Type: application/json" \
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24 --data-binary '{"musing":"To be, or not to be: that is the question"}'
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25 ```
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26
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27 ## Atom example
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28
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29 ``` {.bash}
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30 curl http://localhost:5280/pubsub_post/princely_musings \
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31 -H "Content-Type: application/xml" \
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32 --data-binary '<feed xmlns="http://www.w3.org/2005/Atom">
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33 <entry><title>Hello</title></entry></feed>'
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34
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35 ```
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36
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37 # Configuration
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38
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39 All settings are optional.
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40
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41 ## Actor identification
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42
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43 First we have to figure out who is making the request.
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44 This is configured on a per-node basis like this:
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45
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46 ``` {.lua}
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47 -- Per node secrets
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48 pubsub_post_actors = {
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49 princely_musings = "hamlet@denmark.lit"
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50 }
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51 pubsub_post_default_actor = "nobody@nowhere.invalid"
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52 ```
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53
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54 `pubsub_post_default_actor` is used when trying to publish to a node
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55 that is not listed in `pubsub_post_actors`. Otherwise the IP address
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56 of the connection is used.
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57
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58 ## Authentication
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59
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60 [WebSub](https://www.w3.org/TR/2018/REC-websub-20180123/) [Authenticated
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61 Content
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62 Distribution](https://www.w3.org/TR/2018/REC-websub-20180123/#authenticated-content-distribution)
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63 authentication is used.
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64
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65 ``` {.lua}
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66 pubsub_post_secrets = {
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67 princely_musings = "shared secret"
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68 }
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69 pubsub_post_default_secret = "default secret"
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70 ```
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71
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72 `pubsub_post_default_secret` is used when trying to publish to a node
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73 that is not listed in `pubsub_post_secrets`. Otherwise the request
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74 proceeds with the previously identified actor.
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75
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76 ::: {.alert .alert-danger}
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77 If configured without a secret and a default actor that has permission
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78 to create nodes the service becomes wide open.
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79 :::
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80
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81 ## Authorization
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82
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83 Authorization is handled via pubsub affiliations. Publishing requires an
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84 affiliation with the _publish_ capability, usually `"publisher"`.
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85
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86 ### Setting up affiliations
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87
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88 Prosodys PubSub module supports [setting affiliations via
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89 XMPP](https://xmpp.org/extensions/xep-0060.html#owner-affiliations), in
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90 trunk since [revision
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91 384ef9732b81](https://hg.prosody.im/trunk/rev/384ef9732b81), so
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92 affiliations can be configured with a capable client.
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93
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94 It can however be done from another plugin:
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95
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96 ``` {.lua}
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97 local mod_pubsub = module:depends("pubsub");
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98 local pubsub = mod_pubsub.service;
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99
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100 pubsub:create("princely_musings", true);
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101 pubsub:set_affiliation("princely_musings", true, "127.0.0.1", "publisher");
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102 ```