prosody-modules
a85efae90e21
mod_pubsub_post/mod_pubsub_post.lua

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mod_pubsub_post/mod_pubsub_post.lua @ 4935:a85efae90e21

mod_rest: Expand mapping of XEP-0045 join stanza The previous 'join' mapping was apparently lost in translation when swithing to datamapper, so might as well map some properties allowing history control. Usually you probably want either zero history or history since the last known time of being joined. Maybe that the former should be the default?
author Kim Alvefur <zash@zash.se>
date Sat, 30 Apr 2022 01:00:01 +0200
parent 4552:c87181a98f29
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
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1 module:depends("http");
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2
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3 local st = require "util.stanza";
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4 local json = require "util.json";
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5 local xml = require "util.xml";
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6 local http = require "net.http";
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7 local uuid_generate = require "util.uuid".generate;
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8 local timestamp_generate = require "util.datetime".datetime;
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9 local hashes = require "util.hashes";
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10 local from_hex = require "util.hex".from;
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11 local hmacs = {
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12 sha1 = hashes.hmac_sha1;
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13 sha256 = hashes.hmac_sha256;
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14 sha384 = hashes.hmac_sha384;
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15 sha512 = hashes.hmac_sha512;
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16 };
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17
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18 local pubsub_service = module:depends("pubsub").service;
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19
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20 local mappings = module:get_option("pubsub_post_mappings", nil);
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21 local datamapper;
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22 if type(mappings) == "table" then
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23 datamapper = require "util.datamapper";
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24 for node, f in pairs(mappings) do
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25 if type(f) == "string" then
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26 local fh = assert(module:load_resource(f));
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27 mappings[node] = assert(json.parse(fh:read("*a")));
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28 fh:close()
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29 end
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30 end
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31 end
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32
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33 local function wrap(node, parsed, raw)
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34 if mappings and mappings[node] then
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35 return datamapper.unparse(mappings[node], parsed)
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36 end
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37 return st.stanza("json", { xmlns="urn:xmpp:json:0" }):text(raw);
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38 end
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39
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40 local error_mapping = {
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41 ["forbidden"] = 403;
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42 ["item-not-found"] = 404;
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43 ["internal-server-error"] = 500;
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44 ["conflict"] = 409;
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45 };
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46
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47 local function publish_payload(node, actor, item_id, payload)
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48 local post_item = st.stanza("item", { xmlns = "http://jabber.org/protocol/pubsub", id = item_id, })
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49 :add_child(payload);
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50 local ok, err = pubsub_service:publish(node, actor, item_id, post_item);
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51 module:log("debug", ":publish(%q, true, %q, %s) -> %q", node, item_id, payload:top_tag(), err or "");
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52 if not ok then
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53 return error_mapping[err] or 500;
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54 end
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55 return 202;
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56 end
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57
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58 local function handle_json(node, actor, data)
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59 local parsed, err = json.decode(data);
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60 if not parsed then
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61 return { status_code = 400; body = tostring(err); }
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62 end
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63 if type(parsed) ~= "table" then
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64 return { status_code = 400; body = "object or array expected"; };
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65 end
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66 local payload = wrap(node, parsed, data)
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67 local item_id = "current";
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68 if payload.attr["http://jabber.org/protocol/pubsub\1id"] then
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69 item_id = payload.attr["http://jabber.org/protocol/pubsub\1id"];
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70 payload.attr["http://jabber.org/protocol/pubsub\1id"] = nil;
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71 elseif type(parsed.id) == "string" then
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72 item_id = parsed.id;
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73 end
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74 return publish_payload(node, actor, item_id, payload);
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75 end
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76
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77 local function publish_atom(node, actor, feed)
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78 for entry in feed:childtags("entry") do
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79 local item_id = entry:get_child_text("id");
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80 if not item_id then
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81 item_id = uuid_generate();
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82 entry:tag("id"):text(item_id):up();
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83 end
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84 if not entry:get_child_text("published") then
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85 entry:tag("published"):text(timestamp_generate()):up();
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86 end
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87 local resp = publish_payload(node, actor, item_id, entry);
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88 if resp ~= 202 then return resp; end
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89 end
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90 return 202;
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91 end
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92
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93 local function handle_xml(node, actor, payload)
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94 local xmlpayload, err = xml.parse(payload);
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95 if not xmlpayload then
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96 module:log("debug", "XML parse error: %s\n%q", err, payload);
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97 return { status_code = 400, body = tostring(err) };
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98 end
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99 if xmlpayload.attr.xmlns == "http://www.w3.org/2005/Atom" and xmlpayload.name == "feed" then
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100 return publish_atom(node, actor, xmlpayload);
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101 else
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102 return publish_payload(node, actor, "current", xmlpayload);
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103 end
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104 end
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105
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106 local function handle_urlencoded(node, actor, data)
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107 local parsed = http.formdecode(data);
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108 if type(parsed) ~= "table" then return {status_code = 400; body = "invalid payload"}; end
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109 for i = 1, #parsed do parsed[i] = nil; end
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110
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111 local payload = wrap(node, parsed, json.encode(parsed));
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112 local item_id = "current";
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113 if payload.attr["http://jabber.org/protocol/pubsub\1id"] then
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114 item_id = payload.attr["http://jabber.org/protocol/pubsub\1id"];
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115 payload.attr["http://jabber.org/protocol/pubsub\1id"] = nil;
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116 elseif type(parsed.id) == "string" then
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117 item_id = parsed.id;
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118 end
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119 return publish_payload(node, actor, item_id, payload);
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120 end
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121
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122 local actor_source = module:get_option_string("pubsub_post_actor"); -- COMPAT
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123 local default_secret = module:get_option_string("pubsub_post_default_secret");
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124 local actor_secrets = module:get_option("pubsub_post_secrets");
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125 local actors = module:get_option("pubsub_post_actors");
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126 local default_actor = module:get_option_string("pubsub_post_default_actor");
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127 if not default_actor and actor_source == "superuser" then
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128 default_actor = true;
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129 end
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130
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131 local function verify_signature(secret, body, signature)
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132 if not signature then return false; end
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133 local algo, digest = signature:match("^([^=]+)=(%x+)");
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134 if not algo then return false; end
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135 local hmac = hmacs[algo];
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136 if not algo then return false; end
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137 return hmac(secret, body) == from_hex(digest);
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138 end
3018
727a8beeb5c3 mod_pubsub_post: Add an option for what to use as pubsub 'actor'
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parents: 3017
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139
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parents: 3013
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140 function handle_POST(event, path)
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141 local request = event.request;
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142
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143 local content_type = request.headers.content_type or "application/octet-stream";
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144 local actor = actors and actors[path] or default_actor or request.ip;
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145 local secret = actor_secrets and actor_secrets[path] or default_secret;
3014
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parents: 3013
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146
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147 module:log("debug", "Handling POST to node %q by %q with %q: \n%s\n", path, actor, content_type, request.body);
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148
3501
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149 if secret and not verify_signature(secret, request.body, request.headers.x_hub_signature) then
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150 module:log("debug", "Signature validation failed");
3501
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151 return 401;
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152 end
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153
3255
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parents: 3254
diff changeset
154 if not actor then
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155 return 401;
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156 end
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parents: 3254
diff changeset
157
3014
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parents: 3013
diff changeset
158 if content_type == "application/xml" or content_type:sub(-4) == "+xml" then
3017
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Kim Alvefur <zash@zash.se>
parents: 3016
diff changeset
159 return handle_xml(path, actor, request.body);
3016
3f4e2340bfdc mod_pubsub_post: Add support for publishing arbitrary JSON
Kim Alvefur <zash@zash.se>
parents: 3015
diff changeset
160 elseif content_type == "application/json" or content_type:sub(-5) == "+json" then
3017
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parents: 3016
diff changeset
161 return handle_json(path, actor, request.body);
4552
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parents: 4522
diff changeset
162 elseif content_type == "application/x-www-form-urlencoded" then
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parents: 4522
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163 return handle_urlencoded(path, actor, request.body);
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parents: 3013
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164 end
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parents: 3013
diff changeset
165
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parents: 3013
diff changeset
166 module:log("debug", "Unsupported content-type: %q", content_type);
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parents: 3013
diff changeset
167 return 415;
1619
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
168 end
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parents:
diff changeset
169
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parents:
diff changeset
170 module:provides("http", {
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parents:
diff changeset
171 route = {
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parents:
diff changeset
172 ["POST /*"] = handle_POST;
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parents:
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173 };
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parents:
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174 });
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parents:
diff changeset
175
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parents:
diff changeset
176 function module.load()
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parents:
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177 module:log("debug", "Loaded at %s", module:http_url());
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parents:
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178 end