Mercurial > prosody-modules
annotate mod_pastebin/mod_pastebin.lua @ 3404:6444fb5dbb51
mod_xhtmlim: Turn unknown elements into <span>
In HTML, you're supposed to replace unknown tags with their content. The
:maptags API can't replace tags with text, but replacing with <span>
should close enough.
author | Kim Alvefur <zash@zash.se> |
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date | Thu, 13 Dec 2018 14:32:17 +0100 (2018-12-13) |
parents | 03cbffd807bb |
children | 09e7e880e056 |
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(); |
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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); |
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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 |
654
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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 }); |
454
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181 |
517
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182 local function set_pastes_metatable() |
3033
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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 |