Mercurial > prosody-modules
annotate mod_pastebin/mod_pastebin.lua @ 2898:9fd61234b6f0
mod_firewall/definitions: Comments on LIST backends
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Tue, 06 Mar 2018 18:24:34 +0100 |
| parents | 314cebb3071e |
| children | 26fe44c68791 |
| rev | line source |
|---|---|
| 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_insert, t_remove = table.insert, 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 local muc_rooms = module:depends "muc".rooms; |
| 5 | 10 |
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11 local utf8_pattern = "[\194-\244][\128-\191]*$"; |
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12 local function drop_invalid_utf8(seq) |
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13 local start = seq:byte(); |
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14 module:log("debug", "utf8: %d, %d", start, #seq); |
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15 if (start <= 223 and #seq < 2) |
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16 or (start >= 224 and start <= 239 and #seq < 3) |
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17 or (start >= 240 and start <= 244 and #seq < 4) |
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18 or (start > 244) then |
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19 return ""; |
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20 end |
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21 return seq; |
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22 end |
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23 |
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24 local function utf8_length(str) |
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25 local _, count = string.gsub(str, "[^\128-\193]", ""); |
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26 return count; |
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27 end |
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28 |
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29 local pastebin_private_messages = module:get_option_boolean("pastebin_private_messages", hosts[module.host].type ~= "component"); |
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30 local length_threshold = module:get_option_number("pastebin_threshold", 500); |
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31 local line_threshold = module:get_option_number("pastebin_line_threshold", 4); |
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32 local max_summary_length = module:get_option_number("pastebin_summary_length", 150); |
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33 local html_preview = module:get_option_boolean("pastebin_html_preview", true); |
| 5 | 34 |
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35 local base_url = module:get_option_string("pastebin_url", module:http_url()):gsub("/$", "").."/"; |
| 5 | 36 |
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37 -- Seconds a paste should live for in seconds (config is in hours), default 24 hours |
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38 local expire_after = math.floor(module:get_option_number("pastebin_expire_after", 24) * 3600); |
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39 |
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40 local trigger_string = module:get_option_string("pastebin_trigger"); |
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41 trigger_string = (trigger_string and trigger_string .. " "); |
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42 |
| 5 | 43 local pastes = {}; |
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44 local default_headers = { ["Content-Type"] = "text/plain; charset=utf-8" }; |
| 5 | 45 |
| 46 local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im"; | |
| 47 local xmlns_xhtml = "http://www.w3.org/1999/xhtml"; | |
| 48 | |
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49 function pastebin_text(text) |
| 5 | 50 local uuid = uuid_new(); |
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51 pastes[uuid] = { body = text, time = os_time(), headers = default_headers }; |
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52 pastes[#pastes+1] = uuid; |
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53 if not pastes[2] then -- No other pastes, give the timer a kick |
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54 add_task(expire_after, expire_pastes); |
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55 end |
| 5 | 56 return base_url..uuid; |
| 57 end | |
| 58 | |
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59 function handle_request(event, pasteid) |
| 5 | 60 if not pasteid or not pastes[pasteid] then |
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61 event.response.headers = default_headers; |
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62 return event.response:send("Invalid paste id, perhaps it expired?"); |
| 5 | 63 end |
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64 |
| 5 | 65 --module:log("debug", "Received request, replying: %s", pastes[pasteid].text); |
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66 |
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67 return pastes[pasteid]; |
| 5 | 68 end |
| 69 | |
| 70 function check_message(data) | |
| 71 local origin, stanza = data.origin, data.stanza; | |
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72 |
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73 -- Only check for MUC presence when loaded on a component. |
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74 if module:get_host_type() == "component" then |
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75 local room = muc_rooms[jid_bare(stanza.attr.to)]; |
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76 if not room then return; end |
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77 |
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78 local nick = room._jid_nick[stanza.attr.from]; |
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79 if not nick then return; end |
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80 end |
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81 |
| 5 | 82 local body, bodyindex, htmlindex; |
| 83 for k,v in ipairs(stanza) do | |
| 84 if v.name == "body" then | |
| 85 body, bodyindex = v, k; | |
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86 elseif v.name == "html" and v.attr.xmlns == xmlns_xhtmlim then |
| 5 | 87 htmlindex = k; |
| 88 end | |
| 89 end | |
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90 |
| 5 | 91 if not body then return; end |
| 92 body = body:get_text(); | |
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93 |
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94 --module:log("debug", "Body(%s) length: %d", type(body), #(body or "")); |
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95 |
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96 if body and ( |
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97 ((#body > length_threshold) |
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98 and (utf8_length(body) > length_threshold)) or |
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99 (trigger_string and body:find(trigger_string, 1, true) == 1) or |
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100 (select(2, body:gsub("\n", "%0")) >= line_threshold) |
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101 ) then |
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102 if trigger_string then |
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103 body = body:gsub("^" .. trigger_string, "", 1); |
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104 end |
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105 local url = pastebin_text(body); |
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106 module:log("debug", "Pasted message as %s", url); |
| 5 | 107 --module:log("debug", " stanza[bodyindex] = %q", tostring( stanza[bodyindex])); |
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108 local summary = (body:sub(1, max_summary_length):gsub(utf8_pattern, drop_invalid_utf8) or ""):match("[^\n]+") or ""; |
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109 summary = summary:match("^%s*(.-)%s*$"); |
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110 local summary_prefixed = summary:match("[,:]$"); |
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111 stanza[bodyindex][1] = (summary_prefixed and (summary.." ") or "")..url; |
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112 |
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113 if html_preview then |
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114 local line_count = select(2, body:gsub("\n", "%0")) + 1; |
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115 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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116 local html = st.stanza("html", { xmlns = xmlns_xhtmlim }):tag("body", { xmlns = xmlns_xhtml }); |
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117 html:tag("p"):text(summary.." "):up(); |
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118 html:tag("a", { href = url }):text(link_text):up(); |
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119 stanza[htmlindex or #stanza+1] = html; |
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120 end |
| 5 | 121 end |
| 122 end | |
| 123 | |
| 124 module:hook("message/bare", check_message); | |
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125 if pastebin_private_messages then |
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126 module:hook("message/full", check_message); |
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127 end |
| 5 | 128 |
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129 function expire_pastes(time) |
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130 time = time or os_time(); -- COMPAT with 0.5 |
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131 if pastes[1] then |
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132 pastes[pastes[1]] = nil; |
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133 t_remove(pastes, 1); |
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134 if pastes[1] then |
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135 return (expire_after - (time - pastes[pastes[1]].time)) + 1; |
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136 end |
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137 end |
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138 end |
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139 |
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140 |
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141 module:provides("http", { |
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142 route = { |
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143 ["GET /*"] = handle_request; |
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144 }; |
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145 }); |
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146 |
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147 local function set_pastes_metatable() |
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148 if expire_after == 0 then |
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149 local dm = require "util.datamanager"; |
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150 setmetatable(pastes, { |
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151 __index = function (pastes, id) |
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152 if type(id) == "string" then |
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153 return dm.load(id, module.host, "pastebin"); |
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154 end |
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155 end; |
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156 __newindex = function (pastes, id, data) |
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157 if type(id) == "string" then |
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158 dm.store(id, module.host, "pastebin", data); |
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159 end |
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160 end; |
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161 }); |
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162 else |
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163 setmetatable(pastes, nil); |
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164 end |
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165 end |
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166 |
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167 module.load = set_pastes_metatable; |
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168 |
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169 function module.save() |
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170 return { pastes = pastes }; |
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171 end |
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172 |
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173 function module.restore(data) |
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174 pastes = data.pastes or pastes; |
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175 set_pastes_metatable(); |
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176 end |