prosody-modules
09d6bbd6c8a4
mod_pubsub_post/mod_pubsub_post.lua

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mod_pubsub_post/mod_pubsub_post.lua @ 5185:09d6bbd6c8a4

mod_http_oauth2: Fix treatment of 'redirect_uri' parameter in code flow It's optional and the one stored in the client registration should really be used instead. RFC 6749 says an URI provided as parameter MUST be validated against the stored one but does not say how. Given that the client needs their secret to proceed, it seems fine to leave this for later.
author Kim Alvefur <zash@zash.se>
date Thu, 02 Mar 2023 22:00:42 +0100
parent 4552:c87181a98f29
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rev   line source
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43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
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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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Kim Alvefur <zash@zash.se>
parents: 3255
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124 local actor_secrets = module:get_option("pubsub_post_secrets");
3503
882180b459a0 mod_pubsub_post: Restructure authentication and authorization (BC)
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parents: 3501
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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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parents: 3255
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131 local function verify_signature(secret, body, signature)
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parents: 3255
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132 if not signature then return false; end
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parents: 3255
diff changeset
133 local algo, digest = signature:match("^([^=]+)=(%x+)");
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parents: 3255
diff changeset
134 if not algo then return false; end
1df139b157fb mod_pubsub_post: Add support for WebSub authentication
Kim Alvefur <zash@zash.se>
parents: 3255
diff changeset
135 local hmac = hmacs[algo];
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Kim Alvefur <zash@zash.se>
parents: 3255
diff changeset
136 if not algo then return false; end
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parents: 3255
diff changeset
137 return hmac(secret, body) == from_hex(digest);
1df139b157fb mod_pubsub_post: Add support for WebSub authentication
Kim Alvefur <zash@zash.se>
parents: 3255
diff changeset
138 end
3018
727a8beeb5c3 mod_pubsub_post: Add an option for what to use as pubsub 'actor'
Kim Alvefur <zash@zash.se>
parents: 3017
diff changeset
139
3014
72dbc9b66de8 mod_pubsub_post: Change to support arbitrary XML payloads
Kim Alvefur <zash@zash.se>
parents: 3013
diff changeset
140 function handle_POST(event, path)
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Kim Alvefur <zash@zash.se>
parents: 3013
diff changeset
141 local request = event.request;
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parents: 3013
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142
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Kim Alvefur <zash@zash.se>
parents: 3013
diff changeset
143 local content_type = request.headers.content_type or "application/octet-stream";
3503
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Kim Alvefur <zash@zash.se>
parents: 3501
diff changeset
144 local actor = actors and actors[path] or default_actor or request.ip;
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Kim Alvefur <zash@zash.se>
parents: 3501
diff changeset
145 local secret = actor_secrets and actor_secrets[path] or default_secret;
3014
72dbc9b66de8 mod_pubsub_post: Change to support arbitrary XML payloads
Kim Alvefur <zash@zash.se>
parents: 3013
diff changeset
146
3504
9ef5b229f73e mod_pubsub_post: Make debug messages more informative
Kim Alvefur <zash@zash.se>
parents: 3503
diff changeset
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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parents: 3503
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148
3501
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Kim Alvefur <zash@zash.se>
parents: 3255
diff changeset
149 if secret and not verify_signature(secret, request.body, request.headers.x_hub_signature) then
3504
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Kim Alvefur <zash@zash.se>
parents: 3503
diff changeset
150 module:log("debug", "Signature validation failed");
3501
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Kim Alvefur <zash@zash.se>
parents: 3255
diff changeset
151 return 401;
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Kim Alvefur <zash@zash.se>
parents: 3255
diff changeset
152 end
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parents: 3255
diff changeset
153
3255
64d1dfbd1740 mod_pubsub_post: Ensure actor is non-nil (catch inability to determine IP or simliar)
Kim Alvefur <zash@zash.se>
parents: 3254
diff changeset
154 if not actor then
64d1dfbd1740 mod_pubsub_post: Ensure actor is non-nil (catch inability to determine IP or simliar)
Kim Alvefur <zash@zash.se>
parents: 3254
diff changeset
155 return 401;
64d1dfbd1740 mod_pubsub_post: Ensure actor is non-nil (catch inability to determine IP or simliar)
Kim Alvefur <zash@zash.se>
parents: 3254
diff changeset
156 end
64d1dfbd1740 mod_pubsub_post: Ensure actor is non-nil (catch inability to determine IP or simliar)
Kim Alvefur <zash@zash.se>
parents: 3254
diff changeset
157
3014
72dbc9b66de8 mod_pubsub_post: Change to support arbitrary XML payloads
Kim Alvefur <zash@zash.se>
parents: 3013
diff changeset
158 if content_type == "application/xml" or content_type:sub(-4) == "+xml" then
3017
8e48c0b233e0 mod_pubsub_post: Factor out the 'actor' into an argument
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
8e48c0b233e0 mod_pubsub_post: Factor out the 'actor' into an argument
Kim Alvefur <zash@zash.se>
parents: 3016
diff changeset
161 return handle_json(path, actor, request.body);
4552
c87181a98f29 mod_pubsub_post: Add support for urlencoded form-data
Kim Alvefur <zash@zash.se>
parents: 4522
diff changeset
162 elseif content_type == "application/x-www-form-urlencoded" then
c87181a98f29 mod_pubsub_post: Add support for urlencoded form-data
Kim Alvefur <zash@zash.se>
parents: 4522
diff changeset
163 return handle_urlencoded(path, actor, request.body);
3014
72dbc9b66de8 mod_pubsub_post: Change to support arbitrary XML payloads
Kim Alvefur <zash@zash.se>
parents: 3013
diff changeset
164 end
72dbc9b66de8 mod_pubsub_post: Change to support arbitrary XML payloads
Kim Alvefur <zash@zash.se>
parents: 3013
diff changeset
165
72dbc9b66de8 mod_pubsub_post: Change to support arbitrary XML payloads
Kim Alvefur <zash@zash.se>
parents: 3013
diff changeset
166 module:log("debug", "Unsupported content-type: %q", content_type);
72dbc9b66de8 mod_pubsub_post: Change to support arbitrary XML payloads
Kim Alvefur <zash@zash.se>
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
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
169
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
170 module:provides("http", {
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
171 route = {
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
172 ["POST /*"] = handle_POST;
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
173 };
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
174 });
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
175
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
176 function module.load()
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
177 module:log("debug", "Loaded at %s", module:http_url());
43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
178 end