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mod_pastebin/mod_pastebin.lua @ 5810:e79f9dec35c0
mod_c2s_conn_throttle: Reduce log level from error->info
Our general policy is that "error" should never be triggerable by remote
entities, and that it is always about something that requires admin
intervention. This satisfies neither condition.
The "warn" level can be used for unexpected events/behaviour triggered by
remote entities, and this could qualify. However I don't think failed auth
attempts are unexpected enough.
I selected "info" because it is what is also used for other notable session
lifecycle events.
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 07 Dec 2023 15:46:50 +0000 |
parent | 4700:f821eeac0e50 |
child | 5896:8aec430ba205 |
rev | line source |
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5 | 1 |
2 local st = require "util.stanza"; | |
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3 module:depends("http"); |
5 | 4 local uuid_new = require "util.uuid".generate; |
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5 local os_time = os.time; |
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6 local t_remove = table.remove; |
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7 local add_task = require "util.timer".add_task; |
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8 local jid_bare = require "util.jid".bare; |
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9 |
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10 local function get_room_from_jid() end; |
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11 local is_component = module:get_host_type() == "component"; |
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12 if is_component then |
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13 local mod_muc = module:depends "muc"; |
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14 local muc_rooms = rawget(mod_muc, "rooms"); |
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15 get_room_from_jid = rawget(mod_muc, "get_room_from_jid") or |
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16 function (jid) |
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17 return muc_rooms[jid]; |
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18 end |
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19 end |
5 | 20 |
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21 local utf8_pattern = "[\194-\244][\128-\191]*$"; |
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22 local function drop_invalid_utf8(seq) |
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23 local start = seq:byte(); |
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24 module:log("debug", "utf8: %d, %d", start, #seq); |
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25 if (start <= 223 and #seq < 2) |
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26 or (start >= 224 and start <= 239 and #seq < 3) |
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27 or (start >= 240 and start <= 244 and #seq < 4) |
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28 or (start > 244) then |
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29 return ""; |
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30 end |
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31 return seq; |
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32 end |
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33 |
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34 local function utf8_length(str) |
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35 local _, count = string.gsub(str, "[^\128-\193]", ""); |
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36 return count; |
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37 end |
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38 |
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39 local pastebin_private_messages = module:get_option_boolean("pastebin_private_messages", not is_component); |
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40 local length_threshold = module:get_option_number("pastebin_threshold", 500); |
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41 local line_threshold = module:get_option_number("pastebin_line_threshold", 4); |
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42 local max_summary_length = module:get_option_number("pastebin_summary_length", 150); |
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43 local html_preview = module:get_option_boolean("pastebin_html_preview", true); |
5 | 44 |
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45 local base_url = module:get_option_string("pastebin_url", module:http_url()):gsub("/$", "").."/"; |
5 | 46 |
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47 -- Seconds a paste should live for in seconds (config is in hours), default 24 hours |
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48 local expire_after = math.floor(module:get_option_number("pastebin_expire_after", 24) * 3600); |
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49 |
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50 local trigger_string = module:get_option_string("pastebin_trigger"); |
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51 trigger_string = (trigger_string and trigger_string .. " "); |
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52 |
5 | 53 local pastes = {}; |
54 | |
55 local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im"; | |
56 local xmlns_xhtml = "http://www.w3.org/1999/xhtml"; | |
57 | |
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58 function pastebin_text(text) |
5 | 59 local uuid = uuid_new(); |
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60 pastes[uuid] = { body = text, time = os_time(), }; |
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61 pastes[#pastes+1] = uuid; |
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62 if not pastes[2] then -- No other pastes, give the timer a kick |
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63 add_task(expire_after, expire_pastes); |
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64 end |
5 | 65 return base_url..uuid; |
66 end | |
67 | |
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68 function handle_request(event, pasteid) |
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69 event.response.headers.content_type = "text/plain; charset=utf-8"; |
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70 |
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71 if not pasteid then |
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72 return "Invalid paste id, perhaps it expired?"; |
5 | 73 end |
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74 |
5 | 75 --module:log("debug", "Received request, replying: %s", pastes[pasteid].text); |
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76 local paste = pastes[pasteid]; |
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77 |
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78 if not paste then |
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79 return "Invalid paste id, perhaps it expired?"; |
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80 end |
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81 |
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82 return paste.body; |
5 | 83 end |
84 | |
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85 local function replace_tag(s, replacement) |
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86 local once = false; |
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87 s:maptags(function (tag) |
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88 if tag.name == replacement.name and tag.attr.xmlns == replacement.attr.xmlns then |
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89 if not once then |
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90 once = true; |
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91 return replacement; |
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92 else |
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93 return nil; |
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94 end |
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95 end |
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96 return tag; |
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97 end); |
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98 if not once then |
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99 s:add_child(replacement); |
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100 end |
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101 end |
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102 |
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103 local line_count_pattern = string.rep("[^\n]*\n", line_threshold + 1):sub(1,-2); |
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104 |
5 | 105 function check_message(data) |
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106 local stanza = data.stanza; |
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107 |
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108 -- Only check for MUC presence when loaded on a component. |
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109 if is_component then |
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110 local room = get_room_from_jid(jid_bare(stanza.attr.to)); |
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111 if not room then return; end |
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112 |
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113 local nick = room._jid_nick[stanza.attr.from]; |
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114 if not nick then return; end |
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115 end |
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116 |
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117 local body = stanza:get_child_text("body"); |
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118 |
5 | 119 if not body then return; end |
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120 |
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121 --module:log("debug", "Body(%s) length: %d", type(body), #(body or "")); |
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122 |
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123 if ( #body > length_threshold and utf8_length(body) > length_threshold ) or |
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124 (trigger_string and body:find(trigger_string, 1, true) == 1) or |
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125 body:find(line_count_pattern) then |
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126 if trigger_string and body:sub(1, #trigger_string) == trigger_string then |
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127 body = body:sub(#trigger_string+1); |
167
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128 end |
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129 local url = pastebin_text(body); |
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130 module:log("debug", "Pasted message as %s", url); |
5 | 131 --module:log("debug", " stanza[bodyindex] = %q", tostring( stanza[bodyindex])); |
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132 local summary = (body:sub(1, max_summary_length):gsub(utf8_pattern, drop_invalid_utf8) or ""):match("[^\n]+") or ""; |
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133 summary = summary:match("^%s*(.-)%s*$"); |
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134 local summary_prefixed = summary:match("[,:]$"); |
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135 replace_tag(stanza, st.stanza("body"):text(summary .. "\n" .. url)); |
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136 |
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137 stanza:add_child(st.stanza("query", { xmlns = "jabber:iq:oob" }):tag("url"):text(url)); |
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138 |
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139 if html_preview then |
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140 local line_count = select(2, body:gsub("\n", "%0")) + 1; |
446
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141 local link_text = ("[view %spaste (%d line%s)]"):format(summary_prefixed and "" or "rest of ", line_count, line_count == 1 and "" or "s"); |
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142 local html = st.stanza("html", { xmlns = xmlns_xhtmlim }):tag("body", { xmlns = xmlns_xhtml }); |
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143 html:tag("p"):text(summary.." "):up(); |
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144 html:tag("a", { href = url }):text(link_text):up(); |
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145 replace_tag(stanza, html); |
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146 end |
5 | 147 end |
148 end | |
149 | |
150 module:hook("message/bare", check_message); | |
438
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151 if pastebin_private_messages then |
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152 module:hook("message/full", check_message); |
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153 end |
5 | 154 |
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155 module:hook("muc-disco#info", function (event) |
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156 local reply, form, formdata = event.reply, event.form, event.formdata; |
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157 reply:tag("feature", { var = "https://modules.prosody.im/mod_pastebin" }):up(); |
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158 table.insert(form, { name = "{https://modules.prosody.im/mod_pastebin}max_lines", datatype = "xs:integer" }); |
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159 table.insert(form, { name = "{https://modules.prosody.im/mod_pastebin}max_characters", datatype = "xs:integer" }); |
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160 formdata["{https://modules.prosody.im/mod_pastebin}max_lines"] = tostring(line_threshold); |
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161 formdata["{https://modules.prosody.im/mod_pastebin}max_characters"] = tostring(length_threshold); |
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162 end); |
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163 |
24
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164 function expire_pastes(time) |
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165 time = time or os_time(); -- COMPAT with 0.5 |
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166 if pastes[1] then |
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167 pastes[pastes[1]] = nil; |
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168 t_remove(pastes, 1); |
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169 if pastes[1] then |
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170 return (expire_after - (time - pastes[pastes[1]].time)) + 1; |
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171 end |
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172 end |
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173 end |
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174 |
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175 |
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176 module:provides("http", { |
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177 route = { |
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178 ["GET /*"] = handle_request; |
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179 }; |
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180 }); |
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181 |
517
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182 local function set_pastes_metatable() |
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183 -- luacheck: ignore 212/pastes 431/pastes |
516
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184 if expire_after == 0 then |
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185 local dm = require "util.datamanager"; |
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186 setmetatable(pastes, { |
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187 __index = function (pastes, id) |
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188 if type(id) == "string" then |
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189 return dm.load(id, module.host, "pastebin"); |
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190 end |
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191 end; |
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192 __newindex = function (pastes, id, data) |
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193 if type(id) == "string" then |
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194 dm.store(id, module.host, "pastebin", data); |
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195 end |
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196 end; |
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197 }); |
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198 else |
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199 setmetatable(pastes, nil); |
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200 end |
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201 end |
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202 |
517
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203 module.load = set_pastes_metatable; |
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204 |
454
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205 function module.save() |
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206 return { pastes = pastes }; |
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207 end |
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208 |
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209 function module.restore(data) |
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210 pastes = data.pastes or pastes; |
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211 set_pastes_metatable(); |
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212 end |