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mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
author Kim Alvefur <zash@zash.se>
date Mon, 30 Dec 2019 04:07:25 +0100
parents 4b258329e6e4
children d1ad10b76b00
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1 ---
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2 labels:
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3 - 'Stage-Alpha'
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4 summary: RESTful XMPP API
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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 is yet another RESTful API for sending and receiving stanzas via
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10 Prosody. It can be used to build bots and components implemented as HTTP
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11 services.
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12
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13 # Usage
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14
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15 Note that there is currently **no authentication**, so be careful with
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16 exposing the API endpoint to the Internet.
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17
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18 ## Enabling
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19
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20 ``` {.lua}
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21 Component "rest.example.net" "rest"
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22 ```
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23
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24 ## Sending stanzas
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25
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26 The API endpoint becomes available at the path `/rest`, so the full URL
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27 will be something like `https://your-prosody.example:5281/rest`.
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28
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29 To try it, simply `curl` an XML stanza payload:
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30
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31 ``` {.sh}
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32 curl https://prosody.example:5281/rest \
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33 -H 'Content-Type: application/xmpp+xml' \
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34 --data-binary '<message type="chat" to="user@example.org">
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35 <body>Hello!</body>
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36 </body>'
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37 ```
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38
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39 The `Content-Type` **MUST** be `application/xmpp+xml`.
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40
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41 ### Replies
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42
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43 A POST containing an `<iq>` stanza automatically wait for the reply,
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44 long-polling style.
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45
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46 ``` {.sh}
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47 curl https://prosody.example:5281/rest \
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48 -H 'Content-Type: application/xmpp+xml' \
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49 --data-binary '<iq type="get" to="example.net">
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50 <ping xmlns="urn:xmpp:ping"/>
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51 </iq>'
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52 ```
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53
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54 ## Receiving stanzas
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55
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56 TL;DR: Set this webhook callback URL, get XML `POST`-ed there.
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57
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58 ``` {.lua}
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59 Component "rest.example.net" "rest"
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60 rest_callback_url = "http://my-api.example:9999/stanzas"
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61 ```
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62
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63 Example callback looks like:
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64
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65 ``` {.xml}
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66 POST /stanzas HTTP/1.1
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67 Content-Type: application/xmpp+xml
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68 Content-Length: 52
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69
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70 <message to="bot@rest.example.net" from="user@example.com" type="chat">
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71 <body>Hello</body>
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72 </message>
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73 ```
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74
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75 ### Replying
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76
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77 To accept the stanza without returning a reply, respond with HTTP status
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78 code `202` or `204`.
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79
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80 For full control over the response, set the `Content-Type` header to
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81 `application/xmpp+xml` and return an XMPP stanza as an XML snippet.
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82
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83 ``` {.xml}
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84 HTTP/1.1 200 Ok
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85 Content-Type: application/xmpp+xml
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86
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87 <message type="chat">
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88 <body>Yes, this is bot</body>
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89 </message>
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90 ```
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91
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92 # Compatibility
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93
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94 Requires Prosody trunk / 0.12