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annotate mod_component_http/mod_component_http.lua @ 5256:44f7edd4f845

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mod_http_oauth2: Reject non-local hosts in more code paths We're not issuing tokens for users on remote hosts, we can't even authenticate them since they're remote. Thus the host is always the local module.host so no need to pass around the host in most cases or use it for anything but enforcing the same host.
author Kim Alvefur <zash@zash.se>
date Thu, 16 Mar 2023 17:52:10 +0100
parents 032589c801d7
children
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1 local http = require "net.http";
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2 local json = require "util.json";
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3 local st = require "util.stanza";
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4 local xml = require "util.xml";
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5 local unpack = rawget(_G, "unpack") or table.unpack;
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6
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7 local url = module:get_option_string("component_post_url");
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8 assert(url, "Missing required config option 'component_post_url'");
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9
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10 local stanza_kinds = module:get_option_set("post_stanza_types", { "message" });
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11
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12 local http_error_map = {
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13 [0] = { "cancel", "remote-server-timeout", "Connection failure" };
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14 -- 4xx
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15 [400] = { "modify", "bad-request" };
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16 [401] = { "auth", "not-authorized" };
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17 [402] = { "auth", "forbidden", "Payment required" };
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18 [403] = { "auth", "forbidden" };
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19 [404] = { "cancel", "item-not-found" };
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20 [410] = { "cancel", "gone" };
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21 -- 5xx
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22 [500] = { "cancel", "internal-server-error" };
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23 [501] = { "cancel", "feature-not-implemented" };
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24 [502] = { "cancel", "remote-server-timeout", "Bad gateway" };
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25 [503] = { "wait", "remote-server-timeout", "Service temporarily unavailable" };
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26 [504] = { "wait", "remote-server-timeout", "Gateway timeout" };
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27 }
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28
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29 local function error_reply(stanza, code)
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30 local error = http_error_map[code] or { "cancel", "service-unavailable" };
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31 return st.error_reply(stanza, unpack(error, 1, 3));
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32 end
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33
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34 function handle_stanza(event)
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35 local stanza = event.stanza;
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36 local request_body = json.encode({
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37 to = stanza.attr.to;
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38 from = stanza.attr.from;
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39 kind = stanza.name;
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40 body = stanza.name == "message" and stanza:get_child_text("body") or nil;
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41 stanza = tostring(stanza);
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42 });
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43 http.request(url, {
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44 body = request_body;
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45 }, function (response_text, code, response)
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46 if stanza.attr.type == "error" then return; end -- Avoid error loops, don't reply to error stanzas
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47 if code == 200 and response_text and response.headers["content-type"] == "application/json" then
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48 local response_data = json.decode(response_text);
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49 if response_data.stanza then
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50 local reply_stanza = xml.parse(response_data.stanza);
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51 if reply_stanza then
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52 reply_stanza.attr.from, reply_stanza.attr.to = stanza.attr.to, stanza.attr.from;
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53 module:send(reply_stanza);
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54 else
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55 module:log("warn", "Unable to parse reply stanza");
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56 end
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57 else
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58 local stanza_kind = response_data.kind or "message";
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59 local to = response_data.to or stanza.attr.from;
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60 local from = response_data.from or stanza.attr.to;
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61 local reply_stanza = st.stanza(stanza_kind, {
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62 to = to, from = from;
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63 type = response_data.type or (stanza_kind == "message" and "chat") or nil;
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64 });
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65 if stanza_kind == "message" and response_data.body then
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66 reply_stanza:tag("body"):text(tostring(response_data.body)):up();
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67 end
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68 module:log("debug", "Sending %s", tostring(reply_stanza));
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69 module:send(reply_stanza);
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70 end
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71 elseif code >= 200 and code <= 299 then
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72 return;
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73 else
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74 module:send(error_reply(stanza, code));
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75 end
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76 return true;
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77 end);
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78 return true;
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79 end
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80
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81 for stanza_kind in stanza_kinds do
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82 for _, jid_type in ipairs({ "host", "bare", "full" }) do
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83 module:hook(stanza_kind.."/"..jid_type, handle_stanza);
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84 end
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85 end
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86
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87 -- Simple handler for an always-online JID that allows everyone to subscribe to presence
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88 local function default_presence_handler(event)
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89 local stanza = event.stanza;
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90 module:log("debug", "Handling %s", tostring(stanza));
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91 if stanza.attr.type == "probe" then
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92 module:send(st.presence({ to = stanza.attr.from, from = stanza.attr.to.."/default" }));
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93 elseif stanza.attr.type == "subscribe" then
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94 module:send(st.presence({ type = "subscribed", to = stanza.attr.from, from = stanza.attr.to.."/default" }));
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95 module:send(st.presence({ to = stanza.attr.from, from = stanza.attr.to.."/default" }));
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96 elseif stanza.attr.type == "unsubscribe" then
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97 module:send(st.presence({ type = "unavailable", to = stanza.attr.from, from = stanza.attr.to.."/default" }));
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98 end
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99 return true;
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100 end
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101
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102 module:hook("presence/bare", default_presence_handler, -1);