Mercurial > prosody-modules
annotate mod_pubsub_post/mod_pubsub_post.lua @ 5139:449e4ca4de32
mod_unified_push: Remove dependency on trunk util.jwt (0.12 compat)
This should allow the module to work on 0.12, while preserving expiry checking
(which was not built in to 0.12's util.jwt).
author | Matthew Wild <mwild1@gmail.com> |
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date | Tue, 10 Jan 2023 16:34:21 +0000 |
parents | c87181a98f29 |
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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 |
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139 |
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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; |
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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 |
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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"); |
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151 return 401; |
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152 end |
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153 |
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154 if not actor then |
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155 return 401; |
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156 end |
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157 |
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158 if content_type == "application/xml" or content_type:sub(-4) == "+xml" then |
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159 return handle_xml(path, actor, request.body); |
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160 elseif content_type == "application/json" or content_type:sub(-5) == "+json" then |
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161 return handle_json(path, actor, request.body); |
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162 elseif content_type == "application/x-www-form-urlencoded" then |
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163 return handle_urlencoded(path, actor, request.body); |
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164 end |
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165 |
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166 module:log("debug", "Unsupported content-type: %q", content_type); |
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167 return 415; |
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168 end |
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169 |
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170 module:provides("http", { |
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171 route = { |
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172 ["POST /*"] = handle_POST; |
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173 }; |
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174 }); |
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175 |
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176 function module.load() |
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177 module:log("debug", "Loaded at %s", module:http_url()); |
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178 end |