Mercurial > prosody-modules
annotate mod_http_roster_admin/mod_http_roster_admin.lua @ 2571:a33edc07d829
mod_firewall: spam-blocking.pfw: More comments for documentation
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Fri, 24 Feb 2017 15:58:37 +0000 |
| parents | 68ebc52222dc |
| children | 7c3a1688e385 |
| rev | line source |
|---|---|
| 2161 | 1 -- mod_http_roster_admin |
| 2 -- Description: Allow user rosters to be sourced from a remote HTTP API | |
| 3 -- | |
| 4 -- Version: 1.0 | |
| 5 -- Date: 2015-03-06 | |
| 6 -- Author: Matthew Wild <matthew@prosody.im> | |
| 7 -- License: MPLv2 | |
| 8 -- | |
| 9 -- Requirements: | |
| 10 -- Prosody config: | |
| 11 -- storage = { roster = "memory" } | |
| 12 -- modules_disabled = { "roster" } | |
| 13 -- Dependencies: | |
| 14 -- Prosody 0.9 | |
| 15 -- lua-cjson (Debian/Ubuntu/LuaRocks: lua-cjson) | |
| 16 | |
| 17 local http = require "net.http"; | |
| 18 local json = require "cjson"; | |
| 19 local it = require "util.iterators"; | |
| 20 local set = require "util.set"; | |
| 21 local rm = require "core.rostermanager"; | |
| 22 local st = require "util.stanza"; | |
| 23 local array = require "util.array"; | |
| 24 | |
| 25 local host = module.host; | |
| 26 local sessions = hosts[host].sessions; | |
| 27 | |
| 28 local roster_url = module:get_option_string("http_roster_url", "http://localhost/%s"); | |
| 29 | |
| 30 -- Send a roster push to the named user, with the given roster, for the specified | |
| 31 -- contact's roster entry. Used to notify clients of changes/removals. | |
| 32 local function roster_push(username, roster, contact_jid) | |
| 33 local stanza = st.iq({type="set"}) | |
| 34 :tag("query", {xmlns = "jabber:iq:roster" }); | |
| 35 local item = roster[contact_jid]; | |
| 36 if item then | |
| 37 stanza:tag("item", {jid = contact_jid, subscription = item.subscription, name = item.name, ask = item.ask}); | |
| 38 for group in pairs(item.groups) do | |
| 39 stanza:tag("group"):text(group):up(); | |
| 40 end | |
| 41 else | |
| 42 stanza:tag("item", {jid = contact_jid, subscription = "remove"}); | |
| 43 end | |
| 44 stanza:up():up(); -- move out from item | |
| 45 for _, session in pairs(hosts[host].sessions[username].sessions) do | |
| 46 if session.interested then | |
| 47 session.send(stanza); | |
| 48 end | |
| 49 end | |
| 50 end | |
| 51 | |
| 52 -- Send latest presence from the named local user to a contact. | |
| 53 local function send_presence(username, contact_jid, available) | |
| 54 module:log("debug", "Sending %savailable presence from %s to contact %s", (available and "" or "un"), username, contact_jid); | |
| 55 for resource, session in pairs(sessions[username].sessions) do | |
| 56 local pres; | |
| 57 if available then | |
| 58 pres = st.clone(session.presence); | |
| 59 pres.attr.to = contact_jid; | |
| 60 else | |
| 61 pres = st.presence({ to = contact_jid, from = session.full_jid, type = "unavailable" }); | |
| 62 end | |
| 63 module:send(pres); | |
| 64 end | |
| 65 end | |
| 66 | |
| 67 -- Converts a 'friend' object from the API to a Prosody roster item object | |
| 68 local function friend_to_roster_item(friend) | |
| 69 return { | |
| 70 name = friend.name; | |
| 71 subscription = "both"; | |
| 72 groups = friend.groups or {}; | |
| 73 }; | |
| 74 end | |
| 75 | |
| 76 -- Returns a handler function to consume the data returned from | |
| 77 -- the API, compare it to the user's current roster, and perform | |
| 78 -- any actions necessary (roster pushes, presence probes) to | |
| 79 -- synchronize them. | |
| 80 local function updated_friends_handler(username, cb) | |
| 81 return (function (ok, code, friends) | |
| 82 if not ok then | |
| 83 cb(false, code); | |
| 84 end | |
| 85 local user = sessions[username]; | |
| 86 local roster = user.roster; | |
| 87 local old_contacts = set.new(array.collect(it.keys(roster))); | |
| 88 local new_contacts = set.new(array.collect(it.keys(friends))); | |
| 89 | |
| 90 -- These two entries are not real contacts, ignore them | |
| 91 old_contacts:remove(false); | |
| 92 old_contacts:remove("pending"); | |
| 93 | |
| 94 module:log("debug", "New friends list of %s: %s", username, json.encode(friends)); | |
| 95 | |
| 96 -- Calculate which contacts have been added/removed since | |
| 97 -- the last time we fetched the roster | |
| 98 local added_contacts = new_contacts - old_contacts; | |
| 99 local removed_contacts = old_contacts - new_contacts; | |
| 100 | |
| 101 local added, removed = 0, 0; | |
| 102 | |
| 103 -- Add new contacts and notify connected clients | |
| 104 for contact_jid in added_contacts do | |
| 105 module:log("debug", "Processing new friend of %s: %s", username, contact_jid); | |
| 106 roster[contact_jid] = friend_to_roster_item(friends[contact_jid]); | |
| 107 roster_push(username, roster, contact_jid); | |
| 108 send_presence(username, contact_jid, true); | |
| 109 added = added + 1; | |
| 110 end | |
| 111 | |
| 112 -- Remove contacts and notify connected clients | |
| 113 for contact_jid in removed_contacts do | |
| 114 module:log("debug", "Processing removed friend of %s: %s", username, contact_jid); | |
| 115 roster[contact_jid] = nil; | |
| 116 roster_push(username, roster, contact_jid); | |
| 117 send_presence(username, contact_jid, false); | |
| 118 removed = removed + 1; | |
| 119 end | |
| 120 module:log("debug", "User %s: added %d new contacts, removed %d contacts", username, added, removed); | |
| 121 cb(true); | |
| 122 end); | |
| 123 end | |
| 124 | |
| 125 -- Fetch the named user's roster from the API, call callback (cb) | |
| 126 -- with status and result (friends list) when received. | |
| 127 function fetch_roster(username, cb) | |
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128 local x = {headers = {}}; |
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129 x["headers"]["ACCEPT"] = "application/json, text/plain, */*"; |
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130 module:log("debug", "Fetching roster at URL: %s", roster_url:format(username)); |
| 2161 | 131 local ok, err = http.request( |
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132 roster_url:format(username), |
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133 x, |
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134 function (roster_data, code) |
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135 if code ~= 200 then |
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136 module:log("error", "Error fetching roster from %s (code %d): %s", roster_url:format(username), code, tostring(roster_data):sub(1, 40):match("^[^\r\n]+")); |
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137 if code ~= 0 then |
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138 cb(nil, code, roster_data); |
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139 end |
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140 return; |
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141 end |
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142 module:log("debug", "Successfully fetched roster for %s", username); |
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143 module:log("debug", "The roster data is %s", roster_data); |
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144 cb(true, code, json.decode(roster_data)); |
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145 end |
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146 ); |
| 2161 | 147 if not ok then |
| 148 module:log("error", "Failed to connect to roster API at %s: %s", roster_url:format(username), err); | |
| 149 cb(false, 0, err); | |
| 150 end | |
| 151 end | |
| 152 | |
| 153 -- Fetch the named user's roster from the API, synchronize it with | |
| 154 -- the user's current roster. Notify callback (cb) with true/false | |
| 155 -- depending on success or failure. | |
| 156 function refresh_roster(username, cb) | |
| 157 local user = sessions[username]; | |
| 158 if not (user and user.roster) then | |
| 159 module:log("debug", "User's (%q) roster updated, but they are not online - ignoring", username); | |
| 160 cb(true); | |
| 161 return; | |
| 162 end | |
| 163 fetch_roster(username, updated_friends_handler(username, cb)); | |
| 164 end | |
| 165 | |
| 166 --- Roster protocol handling --- | |
| 167 | |
| 168 -- Build a reply to a "roster get" request | |
| 169 local function build_roster_reply(stanza, roster_data) | |
| 170 local roster = st.reply(stanza) | |
| 171 :tag("query", { xmlns = "jabber:iq:roster" }); | |
| 172 | |
| 173 for jid, item in pairs(roster_data) do | |
| 174 if jid and jid ~= "pending" then | |
| 175 roster:tag("item", { | |
| 176 jid = jid, | |
| 177 subscription = item.subscription, | |
| 178 ask = item.ask, | |
| 179 name = item.name, | |
| 180 }); | |
| 181 for group in pairs(item.groups) do | |
| 182 roster:tag("group"):text(group):up(); | |
| 183 end | |
| 184 roster:up(); -- move out from item | |
| 185 end | |
| 186 end | |
| 187 return roster; | |
| 188 end | |
| 189 | |
| 190 -- Handle clients requesting their roster (generally at login) | |
| 191 -- This will not work if mod_roster is loaded (in 0.9). | |
| 192 module:hook("iq-get/self/jabber:iq:roster:query", function(event) | |
| 193 local session, stanza = event.origin, event.stanza; | |
| 194 | |
| 195 session.interested = true; -- resource is interested in roster updates | |
| 196 | |
| 197 local roster = session.roster; | |
| 198 if roster[false].downloaded then | |
| 199 return session.send(build_roster_reply(stanza, roster)); | |
| 200 end | |
| 201 | |
| 202 -- It's possible that we can call this more than once for a new roster | |
| 203 -- Should happen rarely (multiple clients of the same user request the | |
| 204 -- roster in the time it takes the API to respond). Currently we just | |
| 205 -- issue multiple requests, as it's harmless apart from the wasted | |
| 206 -- requests. | |
| 207 fetch_roster(session.username, function (ok, code, friends) | |
| 208 if not ok then | |
| 209 session.send(st.error_reply(stanza, "cancel", "internal-server-error")); | |
| 210 session:close("internal-server-error"); | |
| 211 return; | |
| 212 end | |
| 213 | |
| 214 -- Are we the first callback to handle the downloaded roster? | |
| 215 local first = roster[false].downloaded == nil; | |
| 216 | |
| 217 if first then | |
| 218 -- Fill out new roster | |
| 219 for jid, friend in pairs(friends) do | |
| 220 roster[jid] = friend_to_roster_item(friend); | |
| 221 end | |
| 222 end | |
| 223 | |
| 224 -- Send full roster to client | |
| 225 session.send(build_roster_reply(stanza, roster)); | |
| 226 | |
| 227 if not first then | |
| 228 -- We already had a roster, make sure to handle any changes... | |
| 229 updated_friends_handler(session.username, nil)(ok, code, friends); | |
| 230 end | |
| 231 end); | |
| 232 | |
| 233 return true; | |
| 234 end); | |
| 235 | |
| 236 -- Prevent client from making changes to the roster. This will not | |
| 237 -- work if mod_roster is loaded (in 0.9). | |
| 238 module:hook("iq-set/self/jabber:iq:roster:query", function(event) | |
| 239 local session, stanza = event.origin, event.stanza; | |
| 240 return session.send(st.error_reply(stanza, "cancel", "service-unavailable")); | |
| 241 end); | |
| 242 | |
| 243 --- HTTP endpoint to trigger roster refresh --- | |
| 244 | |
| 245 -- Handles updating for a single user: GET /roster_admin/refresh/USERNAME | |
| 246 function handle_refresh_single(event, username) | |
| 247 refresh_roster(username, function (ok, code, err) | |
| 248 event.response.headers["Content-Type"] = "application/json"; | |
| 249 event.response:send(json.encode({ | |
| 250 status = ok and "ok" or "error"; | |
| 251 message = err or "roster update complete"; | |
| 252 })); | |
| 253 end); | |
| 254 return true; | |
| 255 end | |
| 256 | |
| 257 -- Handles updating for multiple users: POST /roster_admin/refresh | |
| 258 -- Payload should be a JSON array of usernames, e.g. ["user1", "user2", "user3"] | |
| 259 function handle_refresh_multi(event) | |
| 260 local users = json.decode(event.request.body); | |
| 261 if not users then | |
| 262 module:log("warn", "Multi-user refresh attempted with missing/invalid payload"); | |
| 263 event.response:send(400); | |
| 264 return true; | |
| 265 end | |
| 266 | |
| 267 local count, count_err = 0, 0; | |
| 268 | |
| 269 local function cb(ok) | |
| 270 count = count + 1; | |
| 271 if not ok then | |
| 272 count_err = count_err + 1; | |
| 273 end | |
| 274 | |
| 275 if count == #users then | |
| 276 event.response.headers["Content-Type"] = "application/json"; | |
| 277 event.response:send(json.encode({ | |
| 278 status = "ok"; | |
| 279 message = "roster update complete"; | |
| 280 updated = count - count_err; | |
| 281 errors = count_err; | |
| 282 })); | |
| 283 end | |
| 284 end | |
| 285 | |
| 286 for _, username in ipairs(users) do | |
| 287 refresh_roster(username, cb); | |
| 288 end | |
| 289 | |
| 290 return true; | |
| 291 end | |
| 292 | |
| 293 | |
| 294 module:provides("http", { | |
| 295 route = { | |
| 296 ["POST /refresh"] = handle_refresh_multi; | |
| 297 ["GET /refresh/*"] = handle_refresh_single; | |
| 298 }; | |
| 299 }); |