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annotate mod_auto_moved/mod_auto_moved.lua @ 5245:e22cae58141d

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mod_http_oauth2: Organize HTTP routes with comments Starting to get hard to follow. Usually one would start tracing the steps at the HTTP authorize route. Vaguely sorted alphabetically by path and point in the flow. (/register comes before /authorize tho)
author Kim Alvefur <zash@zash.se>
date Sun, 12 Mar 2023 11:27:29 +0100
parents f95a1e197a07
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 local id = require "util.id";
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2 local jid = require "util.jid";
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3 local promise = require "util.promise";
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4 local rm = require "core.rostermanager";
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5 local st = require "util.stanza";
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6
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7 local errors = require "util.error".init(module.name, {
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8 ["statement-not-found"] = { type = "cancel", condition = "item-not-found" };
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9 ["statement-mismatch"] = { type = "cancel", condition = "conlict" };
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10 });
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11
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12 module:hook("presence/bare", function (event)
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13 local origin, stanza = event.origin, event.stanza;
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14 if stanza.attr.type ~= "subscribe" then
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15 return; -- We're only interested in subscription requests
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16 end
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17 local moved = stanza:get_child("moved", "urn:xmpp:moved:1");
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18 if not moved then
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19 return; -- We're only interested in stanzas with a moved notification
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20 end
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21
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22 local verification = stanza:get_child("moved-verification", "https://prosody.im/protocol/moved");
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23 if verification then
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24 return; -- We already attempted to verify this stanza
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25 end
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26
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27 module:log("debug", "Received moved notification from %s", stanza.attr.from);
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28
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29 local old_jid = moved:get_child_text("old-jid");
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30 if not old_jid then
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31 return; -- Failed to read old JID
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32 end
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33
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34 local to_user = jid.node(stanza.attr.to);
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35 local new_jid_unverified = jid.bare(stanza.attr.from);
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36
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37 if not rm.is_contact_subscribed(to_user, module.host, old_jid) then
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38 return; -- Old JID was not an existing contact, ignore
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39 end
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40
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41 if rm.is_contact_pending_in(to_user, module.host, new_jid_unverified)
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42 or rm.is_contact_subscribed(to_user, module.host, new_jid_unverified) then
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43 return; -- New JID already subscribed or pending, ignore
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44 end
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45
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46 local moved_statement_query = st.iq({ to = old_jid, type = "get", id = id.short() })
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47 :tag("pubsub", { xmlns = "http://jabber.org/protocol/pubsub" })
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48 :tag("items", { node = "urn:xmpp:moved:1" })
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49 :tag("item", { id = "current" }):up()
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50 :up()
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51 :up();
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52 -- TODO: Catch and handle <gone/> errors per note in XEP-0283.
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53 module:send_iq(moved_statement_query):next(function (reply)
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54 module:log("debug", "Statement reply: %s", reply.stanza);
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55 local moved_statement = reply.stanza:find("{http://jabber.org/protocol/pubsub}pubsub/items/{http://jabber.org/protocol/pubsub}item/{urn:xmpp:moved:1}moved");
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56 if not moved_statement then
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57 return promise.reject(errors.new("statement-not-found")); -- No statement found
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58 end
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59
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60 local new_jid = jid.prep(moved_statement:get_child_text("new-jid"));
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61 if new_jid ~= new_jid_unverified then
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62 return promise.reject(errors.new("statement-mismatch")); -- Verification failed; JIDs do not match
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63 end
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64
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65 -- Verified!
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66 module:log("info", "Verified moved notification <%s> -> <%s>", old_jid, new_jid);
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67
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68 -- Add incoming subscription and respond
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69 rm.set_contact_pending_in(to_user, module.host, new_jid);
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70 rm.subscribed(to_user, module.host, new_jid);
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71 module:send(st.presence({ to = new_jid, from = to_user.."@"..module.host, type = "subscribed" }));
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72 rm.roster_push(to_user, module.host, new_jid);
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73
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74 -- Request outgoing subscription if old JID had one
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75 if rm.is_user_subscribed(to_user, module.host, old_jid) then
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76 module:log("debug", "Requesting subscription to new JID");
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77 rm.set_contact_pending_out(to_user, module.host, new_jid);
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78 module:send(st.presence({ to = new_jid, from = to_user.."@"..module.host, type = "subscribe" }));
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79 end
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80 end):catch(function (err)
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81 module:log("debug", "Failed to verify moved statement for <%s> -> <%s>: %s", old_jid, new_jid_unverified, require "util.serialization".serialize(err, "debug"));
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82 stanza:reset()
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83 :tag("moved-verification", { xmlns = "https://prosody.im/protocol/moved", status = "failed" })
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84 :up();
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85 module:send(stanza, origin);
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86 end);
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87
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88 -- Halt processing of the stanza, for now
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89 return true;
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90 end, 1);