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comparison mod_pubsub_feeds/mod_pubsub_feeds.lua @ 718:a37e4149ccd1

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mod_pubsub_feeds: Prepare for making it possible to unsubscribe, and some other minor changes.
author Kim Alvefur <zash@zash.se>
date Wed, 20 Jun 2012 16:08:47 +0200
parents e79147fb39f9
children 0a06cf46c263
comparison
equal deleted inserted replaced
717:e79147fb39f9 718:a37e4149ccd1
3 -- Depends: http://code.matthewwild.co.uk/lua-feeds 3 -- Depends: http://code.matthewwild.co.uk/lua-feeds
4 -- 4 --
5 -- Config: 5 -- Config:
6 -- Component "pubsub.example.com" "pubsub" 6 -- Component "pubsub.example.com" "pubsub"
7 -- modules_enabled = { 7 -- modules_enabled = {
8 -- "pubsub_feed"; 8 -- "pubsub_feeds";
9 -- } 9 -- }
10 -- feeds = { -- node -> url 10 -- feeds = { -- node -> url
11 -- prosody_blog = "http://blog.prosody.im/feed/atom.xml"; 11 -- prosody_blog = "http://blog.prosody.im/feed/atom.xml";
12 -- } 12 -- }
13 -- feed_pull_interval = 20 -- minutes 13 -- feed_pull_interval = 20 -- minutes
158 158
159 local function format_url(node) 159 local function format_url(node)
160 return module:http_url(nil, "/callback") .. "?node=" .. urlencode(node); 160 return module:http_url(nil, "/callback") .. "?node=" .. urlencode(node);
161 end 161 end
162 162
163 function subscribe(feed) 163 function subscribe(feed, want)
164 want = want or "subscribe";
164 feed.token = uuid(); 165 feed.token = uuid();
165 feed.secret = uuid(); 166 feed.secret = feed.secret or uuid();
166 local body = formencode{ 167 local body = formencode{
167 ["hub.callback"] = format_url(feed.node); 168 ["hub.callback"] = format_url(feed.node);
168 ["hub.mode"] = "subscribe"; --TODO unsubscribe 169 ["hub.mode"] = want;
169 ["hub.topic"] = feed.url; 170 ["hub.topic"] = feed.url;
170 ["hub.verify"] = "async"; 171 ["hub.verify"] = "async";
171 ["hub.verify_token"] = feed.token; 172 ["hub.verify_token"] = feed.token;
172 ["hub.secret"] = feed.secret; 173 ["hub.secret"] = feed.secret;
173 --["hub.lease_seconds"] = ""; 174 --["hub.lease_seconds"] = "";
174 }; 175 };
175 176
176 --module:log("debug", "subscription request, body: %s", body); 177 --module:log("debug", "subscription request, body: %s", body);
177 178
178 --FIXME The subscription states and related stuff 179 --FIXME The subscription states and related stuff
179 feed.subscription = "subscribe"; 180 feed.subscription = want;
180 http.request(feed.hub, { body = body }, function(data, code, req) 181 http.request(feed.hub, { body = body }, function(data, code, req)
181 module:log("debug", "subscription to %s submitted, status %s", feed.node, tostring(code)); 182 module:log("debug", "subscription to %s submitted, status %s", feed.node, tostring(code));
182 if code >= 400 then 183 if code >= 400 then
183 module:log("error", "There was something wrong with our subscription request, body: %s", tostring(data)); 184 module:log("error", "There was something wrong with our subscription request, body: %s", tostring(data));
184 feed.subscription = "failed"; 185 feed.subscription = "failed";
198 --module:log("debug", "GET data: %s", dump(query)); 199 --module:log("debug", "GET data: %s", dump(query));
199 end 200 end
200 --module:log("debug", "Headers: %s", dump(request.headers)); 201 --module:log("debug", "Headers: %s", dump(request.headers));
201 202
202 local feed = feed_list[query.node]; 203 local feed = feed_list[query.node];
204 if not feed then
205 return 404;
206 end
207
203 if method == "GET" then 208 if method == "GET" then
204 if query.node and feed then 209 if query.node then
205 if query["hub.topic"] ~= feed.url then 210 if query["hub.topic"] ~= feed.url then
206 module:log("debug", "Invalid topic: %s", tostring(query["hub.topic"])) 211 module:log("debug", "Invalid topic: %s", tostring(query["hub.topic"]))
207 return 404 212 return 404
208 end 213 end
209 if query["hub.mode"] ~= feed.subscription then 214 if query["hub.mode"] ~= feed.subscription then
214 -- it would probably invalidate the subscription 219 -- it would probably invalidate the subscription
215 -- when/if the hub asks if it should be renewed 220 -- when/if the hub asks if it should be renewed
216 end 221 end
217 if query["hub.verify_token"] ~= feed.token then 222 if query["hub.verify_token"] ~= feed.token then
218 module:log("debug", "Invalid verify_token: %s", tostring(query["hub.verify_token"])) 223 module:log("debug", "Invalid verify_token: %s", tostring(query["hub.verify_token"]))
219 return 401 224 return 401;
220 end 225 end
221 module:log("debug", "Confirming %s request to %s", feed.subscription, feed.url) 226 module:log("debug", "Confirming %s request to %s", feed.subscription, feed.url)
222 return query["hub.challenge"]; 227 return query["hub.challenge"];
223 end 228 end
224 return 400; 229 return 400;
225 elseif method == "POST" then 230 elseif method == "POST" then
226 local body = request.body; 231 if #body > 0 then
227 if #body > 0 and feed then
228 module:log("debug", "got %d bytes PuSHed for %s", #body, query.node); 232 module:log("debug", "got %d bytes PuSHed for %s", #body, query.node);
229 local signature = request.headers.x_hub_signature; 233 local signature = request.headers.x_hub_signature;
230 if feed.secret then 234 if feed.secret then
231 local localsig = "sha1=" .. hmac_sha1(feed.secret, body, true); 235 local localsig = "sha1=" .. hmac_sha1(feed.secret, body, true);
232 if localsig ~= signature then 236 if localsig ~= signature then