prosody-modules
d59fb4dcf100
mod_rest/mod_rest.lua

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mod_rest/mod_rest.lua @ 3801:d59fb4dcf100

mod_rest: Verify that @xmlns is left empty Prosody needs it to be empty internally.
author Kim Alvefur <zash@zash.se>
date Mon, 30 Dec 2019 07:22:15 +0100
parent 3799:a1f1f703d604
child 3802:f88e07630e4e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 -- RESTful API
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2 --
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3 -- Copyright (c) 2019 Kim Alvefur
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4 --
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5 -- This file is MIT/X11 licensed.
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6
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7 local errors = require "util.error";
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8 local http = require "net.http";
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9 local id = require "util.id";
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10 local jid = require "util.jid";
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11 local st = require "util.stanza";
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12 local xml = require "util.xml";
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13
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14 local allow_any_source = module:get_host_type() == "component";
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15 local validate_from_addresses = module:get_option_boolean("validate_from_addresses", true);
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16
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17 local function handle_post(event)
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18 local request, response = event.request, event.response;
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19 if request.headers.content_type ~= "application/xmpp+xml" then
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20 return errors.new({ code = 415, text = "'application/xmpp+xml' expected" });
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21 end
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22 local payload, err = xml.parse(request.body);
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23 if not payload then
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24 -- parse fail
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25 return errors.new({ code = 400, text = err });
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26 end
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27 if payload.attr.xmlns then
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28 return errors.new({ code = 400, text = "'xmlns' attribute must be empty" });
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29 end
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30 local to = jid.prep(payload.attr.to);
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31 if not to then
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32 return errors.new({ code = 400, text = "Invalid destination JID" });
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33 end
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34 local from = module.host;
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35 if allow_any_source and payload.attr.from then
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36 from = jid.prep(payload.attr.from);
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37 if not from then
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38 return errors.new({ code = 400, text = "Invalid source JID" });
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39 end
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40 if validate_from_addresses and not jid.compare(from, module.host) then
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41 return errors.new({ code = 403, text = "Source JID must belong to current host" });
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42 end
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43 end
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44 payload.attr = {
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45 from = from,
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46 to = to,
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47 id = payload.attr.id or id.medium(),
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48 type = payload.attr.type,
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49 ["xml:lang"] = payload.attr["xml:lang"],
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50 };
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51 if payload.name == "iq" then
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52 if payload.attr.type ~= "get" and payload.attr.type ~= "set" then
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53 return errors.new({ code = 400, text = "'iq' stanza must be of type 'get' or 'set'" });
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54 end
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55 return module:send_iq(payload):next(
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56 function (result)
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57 response.headers.content_type = "application/xmpp+xml";
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58 return tostring(result.stanza);
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59 end,
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60 function (error)
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61 if error.context.stanza then
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62 response.headers.content_type = "application/xmpp+xml";
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63 return tostring(error.context.stanza);
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64 else
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65 return error;
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66 end
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67 end);
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68 elseif payload.name == "message" or payload.name == "presence" then
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69 local origin = {};
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70 function origin.send(stanza)
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71 response:send(tostring(stanza));
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72 return true;
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73 end
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74 response.headers.content_type = "application/xmpp+xml";
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75 if module:send(payload, origin) then
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76 return 202;
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77 else
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78 return 500;
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79 end
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80 else
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81 return errors.new({ code = 400, text = "Invalid stanza, must be 'message', 'presence' or 'iq'." });
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82 end
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83 end
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84
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85 -- Handle stanzas submitted via HTTP
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86 module:depends("http");
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87 module:provides("http", {
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88 route = {
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89 POST = handle_post;
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90 };
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91 });
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92
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93 -- Forward stanzas from XMPP to HTTP and return any reply
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94 local rest_url = module:get_option_string("rest_callback_url", nil);
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95 if rest_url then
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96
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97 local code2err = {
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98 [400] = { condition = "bad-request"; type = "modify" };
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99 [401] = { condition = "not-authorized"; type = "auth" };
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100 [402] = { condition = "not-authorized"; type = "auth" };
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101 [403] = { condition = "forbidden"; type = "auth" };
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102 [404] = { condition = "item-not-found"; type = "cancel" };
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103 [406] = { condition = "not-acceptable"; type = "modify" };
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104 [408] = { condition = "remote-server-timeout"; type = "wait" };
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105 [409] = { condition = "conflict"; type = "cancel" };
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106 [410] = { condition = "gone"; type = "cancel" };
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107 [411] = { condition = "bad-request"; type = "modify" };
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108 [412] = { condition = "bad-request"; type = "modify" };
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109 [413] = { condition = "resource-constraint"; type = "modify" };
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110 [414] = { condition = "resource-constraint"; type = "modify" };
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111 [415] = { condition = "bad-request"; type = "modify" };
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112 [429] = { condition = "resource-constraint"; type = "wait" };
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113 [431] = { condition = "resource-constraint"; type = "wait" };
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114
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115 [500] = { condition = "internal-server-error"; type = "cancel" };
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116 [501] = { condition = "feature-not-implemented"; type = "modify" };
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117 [502] = { condition = "remote-server-timeout"; type = "wait" };
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118 [503] = { condition = "service-unavailable"; type = "cancel" };
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119 [504] = { condition = "remote-server-timeout"; type = "wait" };
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120 [507] = { condition = "resource-constraint"; type = "wait" };
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121 };
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122
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123 local function handle_stanza(event)
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124 local stanza, origin = event.stanza, event.origin;
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125 local reply_needed = stanza.name == "iq";
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126 local receipt;
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127
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128 if stanza.name == "message" and stanza.attr.id and stanza:get_child("urn:xmpp:receipts", "request") then
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129 reply_needed = true;
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Kim Alvefur <zash@zash.se>
parents: 3797
diff changeset
130 receipt = st.stanza("received", { xmlns = "urn:xmpp:receipts", id = stanza.id });
9b4fd2553365 mod_rest: Handle receipt requests on message stanzas
Kim Alvefur <zash@zash.se>
parents: 3797
diff changeset
131 end
3795
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
132
3799
a1f1f703d604 mod_rest: Allow collection of original stanza after sending HTTP request
Kim Alvefur <zash@zash.se>
parents: 3798
diff changeset
133 local request_body = tostring(stanza);
a1f1f703d604 mod_rest: Allow collection of original stanza after sending HTTP request
Kim Alvefur <zash@zash.se>
parents: 3798
diff changeset
134
a1f1f703d604 mod_rest: Allow collection of original stanza after sending HTTP request
Kim Alvefur <zash@zash.se>
parents: 3798
diff changeset
135 -- Keep only the top level element and let the rest be GC'd
a1f1f703d604 mod_rest: Allow collection of original stanza after sending HTTP request
Kim Alvefur <zash@zash.se>
parents: 3798
diff changeset
136 stanza = st.clone(stanza, true);
a1f1f703d604 mod_rest: Allow collection of original stanza after sending HTTP request
Kim Alvefur <zash@zash.se>
parents: 3798
diff changeset
137
3795
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
138 http.request(rest_url, {
3799
a1f1f703d604 mod_rest: Allow collection of original stanza after sending HTTP request
Kim Alvefur <zash@zash.se>
parents: 3798
diff changeset
139 body = request_body,
3795
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
140 headers = {
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
141 ["Content-Type"] = "application/xmpp+xml",
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
142 ["Content-Language"] = stanza.attr["xml:lang"],
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
143 Accept = "application/xmpp+xml, text/plain",
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
144 },
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
145 }, function (body, code, response)
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
146 if (code == 202 or code == 204) and not reply_needed then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
147 -- Delivered, no reply
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
148 return;
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
149 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
150 local reply, reply_text;
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Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
151
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
152 if response.headers["content-type"] == "application/xmpp+xml" then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
153 local parsed, err = xml.parse(body);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
154 if not parsed then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
155 module:log("warn", "REST callback responded with invalid XML: %s, %q", err, body);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
156 elseif parsed.name ~= stanza.name then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
157 module:log("warn", "REST callback responded with the wrong stanza type, got %s but expected %s", parsed.name, stanza.name);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
158 else
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
159 parsed.attr.to, parsed.attr.from = stanza.attr.from, stanza.attr.to;
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
160 if parsed.name == "iq" then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
161 parsed.attr.id = stanza.attr.id;
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
162 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
163 reply = parsed;
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
164 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
165 elseif response.headers["content-type"] == "text/plain" then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
166 reply = st.reply(stanza);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
167 if body ~= "" then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
168 reply_text = body;
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
169 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
170 elseif body ~= "" then -- ignore empty body
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
171 module:log("debug", "Callback returned response of unhandled type %q", response.headers["content-type"]);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
172 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
173
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
174 if not reply then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
175 local code_hundreds = code - (code % 100);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
176 if code_hundreds == 200 then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
177 reply = st.reply(stanza);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
178 if stanza.name ~= "iq" then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
179 reply.attr.id = id.medium();
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
180 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
181 if reply_text and reply.name == "message" then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
182 reply:body(reply_text, { ["xml:lang"] = response.headers["content-language"] });
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
183 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
184 -- TODO presence/status=body ?
3797
ed5d7586a61e mod_rest: Map various HTTP status codes to XMPP stanza errors
Kim Alvefur <zash@zash.se>
parents: 3796
diff changeset
185 elseif code2err[code] then
ed5d7586a61e mod_rest: Map various HTTP status codes to XMPP stanza errors
Kim Alvefur <zash@zash.se>
parents: 3796
diff changeset
186 reply = st.error_reply(stanza, errors.new(code, nil, code2err));
3795
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
187 elseif code_hundreds == 400 then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
188 reply = st.error_reply(stanza, "modify", "bad-request", reply_text);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
189 elseif code_hundreds == 500 then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
190 reply = st.error_reply(stanza, "cancel", "internal-server-error", reply_text);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
191 else
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
192 reply = st.error_reply(stanza, "cancel", "undefined-condition", reply_text);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
193 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
194 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
195
3798
9b4fd2553365 mod_rest: Handle receipt requests on message stanzas
Kim Alvefur <zash@zash.se>
parents: 3797
diff changeset
196 if receipt then
9b4fd2553365 mod_rest: Handle receipt requests on message stanzas
Kim Alvefur <zash@zash.se>
parents: 3797
diff changeset
197 reply:add_direct_child(receipt);
9b4fd2553365 mod_rest: Handle receipt requests on message stanzas
Kim Alvefur <zash@zash.se>
parents: 3797
diff changeset
198 end
9b4fd2553365 mod_rest: Handle receipt requests on message stanzas
Kim Alvefur <zash@zash.se>
parents: 3797
diff changeset
199
3795
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
200 origin.send(reply);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
201 end);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
202
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
203 return true;
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
204 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
205
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
206 if module:get_host_type() == "component" then
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
207 module:hook("iq/bare", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
208 module:hook("message/bare", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
209 module:hook("presence/bare", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
210 module:hook("iq/full", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
211 module:hook("message/full", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
212 module:hook("presence/full", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
213 module:hook("iq/host", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
214 module:hook("message/host", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
215 module:hook("presence/host", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
216 else
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
217 -- Don't override everything on normal VirtualHosts
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
218 module:hook("iq/host", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
219 module:hook("message/host", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
220 module:hook("presence/host", handle_stanza, -1);
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
221 end
f51308fcba83 mod_rest: Allow specifying a webhook/callback to handle incoming stanzas
Kim Alvefur <zash@zash.se>
parents: 3794
diff changeset
222 end