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mod_pubsub_feeds/mod_pubsub_feeds.lua @ 967:a88f33fe6970
mod_firewall: Don't add empty conditions check when no conditions are listed in a rule
author | Matthew Wild <mwild1@gmail.com> |
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date | Sat, 06 Apr 2013 14:03:02 +0100 |
parent | 797:68a067d5ed3b |
child | 983:ac9bf3fcbcfe |
rev | line source |
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1 -- Fetches Atom feeds and publishes to PubSub nodes |
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2 -- |
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3 -- Depends: http://code.matthewwild.co.uk/lua-feeds |
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4 -- |
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5 -- Config: |
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6 -- Component "pubsub.example.com" "pubsub" |
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7 -- modules_enabled = { |
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8 -- "pubsub_feeds"; |
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9 -- } |
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10 -- feeds = { -- node -> url |
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11 -- prosody_blog = "http://blog.prosody.im/feed/atom.xml"; |
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12 -- } |
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13 -- feed_pull_interval = 20 -- minutes |
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14 -- |
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15 -- Reference |
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16 -- http://pubsubhubbub.googlecode.com/svn/trunk/pubsubhubbub-core-0.3.html |
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17 |
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18 local pubsub = module:depends"pubsub"; |
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19 |
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20 local date, time = os.date, os.time; |
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21 local dt_parse, dt_datetime = require "util.datetime".parse, require "util.datetime".datetime; |
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22 local uuid = require "util.uuid".generate; |
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23 local hmac_sha1 = require "util.hmac".sha1; |
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24 local parse_feed = require "feeds".feed_from_string; |
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25 local st = require "util.stanza"; |
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26 --local dump = require"util.serialization".serialize; |
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27 |
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28 local xmlns_atom = "http://www.w3.org/2005/Atom"; |
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29 |
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30 local use_pubsubhubub = module:get_option_boolean("use_pubsubhubub", true); |
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31 if use_pubsubhubub then |
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32 module:depends"http"; |
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33 end |
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34 |
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35 local http = require "net.http"; |
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36 local formdecode = http.formdecode; |
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37 local formencode = http.formencode; |
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38 local urldecode = http.urldecode; |
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39 local urlencode = http.urlencode; |
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40 |
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41 local feed_list = module:shared("feed_list"); |
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42 local refresh_interval; |
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43 |
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44 function module.load() |
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45 local config = module:get_option("feeds") or { |
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46 planet_jabber = "http://planet.jabber.org/atom.xml"; |
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47 prosody_blog = "http://blog.prosody.im/feed/atom.xml"; |
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48 }; |
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49 refresh_interval = module:get_option_number("feed_pull_interval", 15) * 60; |
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50 local ok, nodes = pubsub.service:get_nodes(true); |
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51 if not ok then nodes = {}; end |
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52 local new_feed_list = {}; |
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53 for node, url in pairs(config) do |
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54 if type(node) == "number" then |
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55 node = url; |
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56 end |
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57 new_feed_list[node] = true; |
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58 if not feed_list[node] then |
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59 feed_list[node] = { url = url; node = node; last_update = 0 }; |
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60 else |
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61 feed_list[node].url = url; |
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62 end |
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63 if not nodes[node] then |
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64 feed_list[node].last_update = 0; |
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65 end |
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66 end |
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67 for node in pairs(feed_list) do |
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68 if not new_feed_list[node] then |
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69 feed_list[node] = nil; |
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70 end |
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71 end |
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72 end |
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73 |
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74 function update_entry(item) |
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75 local node = item.node; |
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76 module:log("debug", "parsing %d bytes of data in node %s", #item.data or 0, node) |
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77 local feed = parse_feed(item.data); |
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78 for _, entry in ipairs(feed) do |
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79 entry.attr.xmlns = xmlns_atom; |
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80 |
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81 local e_published = entry:get_child_text("published"); |
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82 e_published = e_published and dt_parse(e_published); |
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83 local e_updated = entry:get_child_text("updated"); |
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84 e_updated = e_updated and dt_parse(e_updated); |
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85 |
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86 local timestamp = e_updated or e_published or nil; |
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87 --module:log("debug", "timestamp is %s, item.last_update is %s", tostring(timestamp), tostring(item.last_update)); |
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88 if not timestamp or not item.last_update or timestamp > item.last_update then |
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89 local id = entry:get_child_text("id"); |
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90 id = id or item.url.."#"..dt_datetime(timestamp); -- Missing id, so make one up |
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91 local xitem = st.stanza("item", { id = id }):add_child(entry); |
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92 -- TODO Put data from /feed into item/source |
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93 |
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94 --module:log("debug", "publishing to %s, id %s", node, id); |
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95 local ok, err = pubsub.service:publish(node, true, id, xitem); |
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96 if not ok then |
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97 if err == "item-not-found" then -- try again |
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98 --module:log("debug", "got item-not-found, creating %s and trying again", node); |
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99 local ok, err = pubsub.service:create(node, true); |
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100 if not ok then |
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101 module:log("error", "could not create node %s: %s", node, err); |
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102 return; |
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103 end |
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104 local ok, err = pubsub.service:publish(node, true, id, xitem); |
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105 if not ok then |
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106 module:log("error", "could not create or publish node %s: %s", node, err); |
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107 return |
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108 end |
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109 else |
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110 module:log("error", "publishing %s failed: %s", node, err); |
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111 end |
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112 end |
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113 end |
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114 end |
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115 |
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116 if use_pubsubhubub and not item.subscription then |
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117 --module:log("debug", "check if %s has a hub", item.node); |
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118 local hub = feed.links and feed.links.hub; |
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119 if hub then |
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120 item.hub = hub; |
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121 module:log("debug", "%s has a hub: %s", item.node, item.hub); |
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122 subscribe(item); |
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123 end |
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124 end |
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125 end |
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126 |
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127 function fetch(item, callback) -- HTTP Pull |
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128 local headers = { }; |
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129 if item.data and item.last_update then |
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130 headers["If-Modified-Since"] = date("!%a, %d %b %Y %H:%M:%S %Z", item.last_update); |
278
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131 end |
322
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132 http.request(item.url, { headers = headers }, function(data, code, req) |
278
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133 if code == 200 then |
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134 item.data = data; |
322
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135 if callback then callback(item) end |
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136 item.last_update = time(); |
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137 elseif code == 304 then |
278
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138 item.last_update = time(); |
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139 end |
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140 end); |
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141 end |
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142 |
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143 function refresh_feeds(force) |
475
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144 local now = time(); |
322
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145 --module:log("debug", "Refreshing feeds"); |
278
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146 for node, item in pairs(feed_list) do |
322
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147 --FIXME Don't fetch feeds which have a subscription |
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148 -- Otoho, what if the subscription expires or breaks? |
793
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149 if force or item.last_update + refresh_interval < now then |
668
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150 --module:log("debug", "checking %s", item.node); |
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151 fetch(item, update_entry); |
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152 end |
278
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153 end |
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154 return refresh_interval; |
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155 end |
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156 |
668
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157 local function format_url(node) |
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158 return module:http_url(nil, "/callback") .. "?node=" .. urlencode(node); |
401
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|
159 end |
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|
160 |
718
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161 function subscribe(feed, want) |
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162 want = want or "subscribe"; |
324
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|
163 feed.token = uuid(); |
718
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|
164 feed.secret = feed.secret or uuid(); |
403
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|
165 local body = formencode{ |
668
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166 ["hub.callback"] = format_url(feed.node); |
718
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167 ["hub.mode"] = want; |
322
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168 ["hub.topic"] = feed.url; |
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169 ["hub.verify"] = "async"; |
324
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|
170 ["hub.verify_token"] = feed.token; |
325
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|
171 ["hub.secret"] = feed.secret; |
322
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172 --["hub.lease_seconds"] = ""; |
403
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|
173 }; |
322
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174 |
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175 --module:log("debug", "subscription request, body: %s", body); |
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176 |
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|
177 --FIXME The subscription states and related stuff |
718
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178 feed.subscription = want; |
322
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179 http.request(feed.hub, { body = body }, function(data, code, req) |
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180 module:log("debug", "subscription to %s submitted, status %s", feed.node, tostring(code)); |
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181 if code >= 400 then |
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182 module:log("error", "There was something wrong with our subscription request, body: %s", tostring(data)); |
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183 feed.subscription = "failed"; |
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|
184 end |
322
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|
185 end); |
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|
186 end |
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|
187 |
668
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|
188 function handle_http_request(event) |
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|
189 local request = event.request; |
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|
190 local method = request.method; |
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|
191 local body = request.body; |
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|
192 |
322
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|
193 --module:log("debug", "%s request to %s%s with body %s", method, request.url.path, request.url.query and "?" .. request.url.query or "", #body > 0 and body or "empty"); |
668
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|
194 local query = request.url.query or {}; --FIXME |
322
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195 if query and type(query) == "string" then |
403
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|
196 query = formdecode(query); |
322
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|
197 --module:log("debug", "GET data: %s", dump(query)); |
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|
198 end |
325
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|
199 --module:log("debug", "Headers: %s", dump(request.headers)); |
322
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|
200 |
668
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|
201 local feed = feed_list[query.node]; |
718
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202 if not feed then |
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|
203 return 404; |
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|
204 end |
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|
205 |
322
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diff
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|
206 if method == "GET" then |
718
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diff
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|
207 if query.node then |
323
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diff
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|
208 if query["hub.topic"] ~= feed.url then |
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|
209 module:log("debug", "Invalid topic: %s", tostring(query["hub.topic"])) |
668
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|
210 return 404 |
322
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211 end |
323
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diff
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|
212 if query["hub.mode"] ~= feed.subscription then |
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diff
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|
213 module:log("debug", "Invalid mode: %s", tostring(query["hub.mode"])) |
668
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|
214 return 400 |
323
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diff
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|
215 -- Would this work for unsubscribe? |
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diff
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|
216 -- Also, if feed.subscription is changed here, |
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|
217 -- it would probably invalidate the subscription |
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|
218 -- when/if the hub asks if it should be renewed |
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219 end |
324
100b3ad2e10c
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220 if query["hub.verify_token"] ~= feed.token then |
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221 module:log("debug", "Invalid verify_token: %s", tostring(query["hub.verify_token"])) |
718
a37e4149ccd1
mod_pubsub_feeds: Prepare for making it possible to unsubscribe, and some other minor changes.
Kim Alvefur <zash@zash.se>
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717
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changeset
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222 return 401; |
323
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223 end |
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224 module:log("debug", "Confirming %s request to %s", feed.subscription, feed.url) |
668
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225 return query["hub.challenge"]; |
322
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mod_pubsub_feed: Implement PubSubHubbub subscriber
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226 end |
668
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227 return 400; |
322
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228 elseif method == "POST" then |
718
a37e4149ccd1
mod_pubsub_feeds: Prepare for making it possible to unsubscribe, and some other minor changes.
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parents:
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changeset
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229 if #body > 0 then |
322
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230 module:log("debug", "got %d bytes PuSHed for %s", #body, query.node); |
668
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mod_pubsub_feed: Cleanup and update to new APIs in 0.9
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parents:
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diff
changeset
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231 local signature = request.headers.x_hub_signature; |
325
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mod_pubsub_feed: Implement signature verification
Kim Alvefur <zash@zash.se>
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324
diff
changeset
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232 if feed.secret then |
4e50e591a7fc
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diff
changeset
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233 local localsig = "sha1=" .. hmac_sha1(feed.secret, body, true); |
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parents:
324
diff
changeset
|
234 if localsig ~= signature then |
668
343b115ebbea
mod_pubsub_feed: Cleanup and update to new APIs in 0.9
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parents:
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diff
changeset
|
235 module:log("debug", "Invalid signature, got %s but wanted %s", tostring(signature), tostring(localsig)); |
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236 return 401; |
325
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mod_pubsub_feed: Implement signature verification
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parents:
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diff
changeset
|
237 end |
4e50e591a7fc
mod_pubsub_feed: Implement signature verification
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diff
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|
238 module:log("debug", "Valid signature"); |
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parents:
324
diff
changeset
|
239 end |
322
637dc0a04052
mod_pubsub_feed: Implement PubSubHubbub subscriber
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parents:
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diff
changeset
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240 feed.data = body; |
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parents:
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diff
changeset
|
241 update_entry(feed); |
637dc0a04052
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diff
changeset
|
242 feed.last_update = time(); |
668
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diff
changeset
|
243 return 202; |
322
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parents:
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diff
changeset
|
244 end |
668
343b115ebbea
mod_pubsub_feed: Cleanup and update to new APIs in 0.9
Kim Alvefur <zash@zash.se>
parents:
633
diff
changeset
|
245 return 400; |
322
637dc0a04052
mod_pubsub_feed: Implement PubSubHubbub subscriber
Kim Alvefur <zash@zash.se>
parents:
300
diff
changeset
|
246 end |
668
343b115ebbea
mod_pubsub_feed: Cleanup and update to new APIs in 0.9
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parents:
633
diff
changeset
|
247 return 501; |
322
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parents:
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diff
changeset
|
248 end |
637dc0a04052
mod_pubsub_feed: Implement PubSubHubbub subscriber
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parents:
300
diff
changeset
|
249 |
668
343b115ebbea
mod_pubsub_feed: Cleanup and update to new APIs in 0.9
Kim Alvefur <zash@zash.se>
parents:
633
diff
changeset
|
250 if use_pubsubhubub then |
343b115ebbea
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parents:
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diff
changeset
|
251 module:provides("http", { |
343b115ebbea
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parents:
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diff
changeset
|
252 default_path = "/callback"; |
343b115ebbea
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parents:
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diff
changeset
|
253 route = { |
343b115ebbea
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parents:
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diff
changeset
|
254 GET = handle_http_request; |
343b115ebbea
mod_pubsub_feed: Cleanup and update to new APIs in 0.9
Kim Alvefur <zash@zash.se>
parents:
633
diff
changeset
|
255 POST = handle_http_request; |
343b115ebbea
mod_pubsub_feed: Cleanup and update to new APIs in 0.9
Kim Alvefur <zash@zash.se>
parents:
633
diff
changeset
|
256 -- This all? |
343b115ebbea
mod_pubsub_feed: Cleanup and update to new APIs in 0.9
Kim Alvefur <zash@zash.se>
parents:
633
diff
changeset
|
257 }; |
343b115ebbea
mod_pubsub_feed: Cleanup and update to new APIs in 0.9
Kim Alvefur <zash@zash.se>
parents:
633
diff
changeset
|
258 }); |
278
653c1826739e
mod_pubsub_feed: Fetches Atom feeds and publishes to PubSub
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
259 end |
653c1826739e
mod_pubsub_feed: Fetches Atom feeds and publishes to PubSub
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
260 |
668
343b115ebbea
mod_pubsub_feed: Cleanup and update to new APIs in 0.9
Kim Alvefur <zash@zash.se>
parents:
633
diff
changeset
|
261 module:add_timer(1, refresh_feeds); |