Mercurial > prosody-modules

annotate mod_pastebin/mod_pastebin.lua @ 5958:5f8a306c8306

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mod_http_oauth2: Require a stringprepped host part of URLs
author Kim Alvefur <zash@zash.se>
date Sat, 31 Aug 2024 13:30:55 +0200
parents 8aec430ba205
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2 local st = require "util.stanza";
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3 module:depends("http");
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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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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
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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);
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44
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45 local base_url = module:get_option_string("pastebin_url", module:http_url()):gsub("/$", "").."/";
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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
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53 local pastes = {};
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54
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55 local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im";
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56 local xmlns_xhtml = "http://www.w3.org/1999/xhtml";
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57
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58 function pastebin_text(text)
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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
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65 return base_url..uuid;
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66 end
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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?";
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73 end
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74
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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;
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83 end
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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 function check_message(data)
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104 local stanza = data.stanza;
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105
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106 -- Only check for MUC presence when loaded on a component.
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107 if is_component then
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108 local room = get_room_from_jid(jid_bare(stanza.attr.to));
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109 if not room then return; end
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110
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111 local nick = room._jid_nick[stanza.attr.from];
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112 if not nick then return; end
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113 end
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114
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115 local body = stanza:get_child_text("body");
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116
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117 if not body then return; end
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118
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119 --module:log("debug", "Body(%s) length: %d", type(body), #(body or ""));
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120
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121 if ( #body > length_threshold and utf8_length(body) > length_threshold ) or
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122 (trigger_string and body:find(trigger_string, 1, true) == 1) or
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123 (select(2, body:gsub("\n", "%0")) >= line_threshold)
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124 then
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125 if trigger_string and body:sub(1, #trigger_string) == trigger_string then
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126 body = body:sub(#trigger_string+1);
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127 end
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128 local url = pastebin_text(body);
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129 module:log("debug", "Pasted message as %s", url);
5
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130 --module:log("debug", " stanza[bodyindex] = %q", tostring( stanza[bodyindex]));
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131 local summary = (body:sub(1, max_summary_length):gsub(utf8_pattern, drop_invalid_utf8) or ""):match("[^\n]+") or "";
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132 summary = summary:match("^%s*(.-)%s*$");
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133 local summary_prefixed = summary:match("[,:]$");
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134 replace_tag(stanza, st.stanza("body"):text(summary .. "\n" .. url));
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135
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136 stanza:add_child(st.stanza("query", { xmlns = "jabber:iq:oob" }):tag("url"):text(url));
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137
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138 if html_preview then
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139 local line_count = select(2, body:gsub("\n", "%0")) + 1;
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140 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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141 local html = st.stanza("html", { xmlns = xmlns_xhtmlim }):tag("body", { xmlns = xmlns_xhtml });
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142 html:tag("p"):text(summary.." "):up();
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143 html:tag("a", { href = url }):text(link_text):up();
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144 replace_tag(stanza, html);
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145 end
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146 end
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147 end
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148
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149 module:hook("message/bare", check_message);
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150 if pastebin_private_messages then
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151 module:hook("message/full", check_message);
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152 end
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153
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154 module:hook("muc-disco#info", function (event)
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155 local reply, form, formdata = event.reply, event.form, event.formdata;
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156 reply:tag("feature", { var = "https://modules.prosody.im/mod_pastebin" }):up();
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157 table.insert(form, { name = "{https://modules.prosody.im/mod_pastebin}max_lines", datatype = "xs:integer" });
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158 table.insert(form, { name = "{https://modules.prosody.im/mod_pastebin}max_characters", datatype = "xs:integer" });
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159 formdata["{https://modules.prosody.im/mod_pastebin}max_lines"] = tostring(line_threshold);
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160 formdata["{https://modules.prosody.im/mod_pastebin}max_characters"] = tostring(length_threshold);
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161 end);
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162
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163 function expire_pastes(time)
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164 time = time or os_time(); -- COMPAT with 0.5
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165 if pastes[1] then
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166 pastes[pastes[1]] = nil;
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167 t_remove(pastes, 1);
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168 if pastes[1] then
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169 return (expire_after - (time - pastes[pastes[1]].time)) + 1;
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diff changeset
170 end
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diff changeset
171 end
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diff changeset
172 end
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173
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diff changeset
174
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diff changeset
175 module:provides("http", {
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176 route = {
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177 ["GET /*"] = handle_request;
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178 };
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179 });
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180
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diff changeset
181 local function set_pastes_metatable()
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182 -- luacheck: ignore 212/pastes 431/pastes
516
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diff changeset
183 if expire_after == 0 then
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diff changeset
184 local dm = require "util.datamanager";
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diff changeset
185 setmetatable(pastes, {
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diff changeset
186 __index = function (pastes, id)
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diff changeset
187 if type(id) == "string" then
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diff changeset
188 return dm.load(id, module.host, "pastebin");
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diff changeset
189 end
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parents: 514
diff changeset
190 end;
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diff changeset
191 __newindex = function (pastes, id, data)
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diff changeset
192 if type(id) == "string" then
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diff changeset
193 dm.store(id, module.host, "pastebin", data);
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parents: 514
diff changeset
194 end
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diff changeset
195 end;
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diff changeset
196 });
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diff changeset
197 else
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diff changeset
198 setmetatable(pastes, nil);
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parents: 514
diff changeset
199 end
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parents: 514
diff changeset
200 end
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diff changeset
201
517
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parents: 516
diff changeset
202 module.load = set_pastes_metatable;
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diff changeset
203
454
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diff changeset
204 function module.save()
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diff changeset
205 return { pastes = pastes };
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diff changeset
206 end
3f101f7a26d0 mod_pastebin: Preserve pastes through a reload
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parents: 446
diff changeset
207
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parents: 446
diff changeset
208 function module.restore(data)
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parents: 446
diff changeset
209 pastes = data.pastes or pastes;
517
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parents: 516
diff changeset
210 set_pastes_metatable();
454
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parents: 446
diff changeset
211 end