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mod_muc_rtbl: also filter messages This was a bit tricky because we don't want to run the JIDs through SHA256 on each message. Took a while to come up with this simple plan of just caching the SHA256 of the JIDs on the occupants. This will leave some dirt in the occupants after unloading the module, but that should be ok; once they cycle the room, the hashes will be gone. This is direly needed, otherwise, there is a tight race between the moderation activities and the actors joining the room.
author Jonas Schäfer <jonas@wielicki.name>
date Tue, 21 Feb 2023 21:37:27 +0100
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1 ---
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2 summary: 'Allows implementing a component or bot over HTTP'
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3 ...
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4
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5 Introduction
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6 ============
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7
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8 This module allows you to implement a component that speaks HTTP. Stanzas (such as messages) coming from XMPP are sent to
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9 a configurable URL as a HTTP POST. If the POST returns a response, that response is returned to the sender over XMPP.
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10
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11 See also mod_post_msg.
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12
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13 Example usage
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14 -------------
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15
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16 Example echo bot in PHP:
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17
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18 ``` php
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19 <?php
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20
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21 // Receive and decode message JSON
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22 $post_data = file_get_contents('php://input');
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23 $received = json_decode($post_data)->body;
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24
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25 // Send response
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26 header('Content-Type: application/json');
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27 echo json_encode(array(
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28 'body' => "Did you say $received?"
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29 ));
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30
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31 ?>
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32 ```
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33
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34 Configuration
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35 =============
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36
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37 The module is quite flexible, but should generally be loaded as a component like this:
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38
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39 ```
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40 Component "yourservice.example.com" "component_http"
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41 component_post_url = "https://example.com/your-api"
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42 ```
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43
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44 Such a component would handle traffic for all JIDs with 'yourservice.example.com' as the hostname, such
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45 as 'foobar@yourservice.example.com'. Although this example uses a subdomain, there is no requirement for
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46 the component to use a subdomain.
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47
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48 Available configuration options are:
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50
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51 Option Description
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52 ------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------------------
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53 component\_post\_url The URL that will handle incoming stanzas
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54 component\_post\_stanzas A list of stanza types to forward over HTTP. Defaults to `{ "message" }`.
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55
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56 Details
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57 =======
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58
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59 Requests
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60 --------
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61
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62 Each received stanza is converted into a JSON object, and submitted to `component_post_url` using a HTTP POST request.
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63
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64 The JSON object always has the following properties:
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65
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66 Property Description
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67 -------------------------- ------------
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68 to The JID that the stanza was sent to (e.g. foobar@your.component.domain)
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69 from The sender's JID.
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70 kind The kind of stanza (will always be "message", "presence" or "iq".
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71 stanza The full XML of the stanza.
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72
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73 Additionally, the JSON object may contain the following properties:
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74
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75 Property Description
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76 -------------------------- ------------
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77 body If the stanza is a message, and it contains a body, this is the string content of the body.
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78
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79
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80 Responses
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81 ---------
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82
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83 If you wish to respond to a stanza, you may include a reply when you respond to the HTTP request.
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84
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85 Responses must have a HTTP status 200 (OK), and must set the Conent-Type header to `application/json`.
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86
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87 A response may contain any of the properties of a request. If not supplied, then defaults are chosen.
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88
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89 If 'to' and 'from' are not specified in the response, they are automatically swapped so that the reply is sent to the original sender of the stanza.
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90
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91 If 'kind' is not set, it defaults to 'message', and if 'body' is set, this is automatically added as a message body.
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92
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93 If 'stanza' is set, it overrides all of the above, and the supplied stanza is sent as-is using Prosody's normal routing rules. Note that stanzas
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94 sent by components must have a 'to' and 'from'.
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95
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96 Presence
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97 --------
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98
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99 By default the module automatically handles presence to provide an always-on component, that automatically accepts subscription requests.
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100
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101 This means that by default presence stanzas are not forwarded to the configured URL. To provide your own presence handling, you can override
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102 this by adding "presence" to the component\_post\_stanzas option in your config.
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103
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104
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105 Compatibility
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106 =============
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107
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108 Should work with all versions of Prosody from 0.9 upwards.