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mod_http_upload/mod_http_upload.lua @ 2043:4ad3f25ab004
mod_smacks: README: Add Conversations to list of supported clients
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 05 Feb 2016 10:29:34 +0000 |
parent | 1967:2ce2b194d501 |
child | 2053:40056a27f394 |
rev | line source |
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1 -- mod_http_upload |
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2 -- |
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3 -- Copyright (C) 2015 Kim Alvefur |
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4 -- |
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5 -- This file is MIT/X11 licensed. |
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6 -- |
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7 -- Implementation of HTTP Upload file transfer mechanism used by Conversations |
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8 -- |
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9 |
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10 -- imports |
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11 local st = require"util.stanza"; |
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12 local lfs = require"lfs"; |
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13 local uuid = require"util.uuid".generate; |
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14 local urlencode = require"util.http".urlencode; |
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15 local t_concat = table.concat; |
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16 local t_insert = table.insert; |
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17 local s_upper = string.upper; |
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18 |
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19 local function join_path(a, b) |
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20 return a .. package.config:sub(1,1) .. b; |
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21 end |
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22 |
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23 -- config |
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24 local file_size_limit = module:get_option_number(module.name .. "_file_size_limit", 10 * 1024 * 1024); -- 10 MB |
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25 |
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26 -- depends |
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27 module:depends("http"); |
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28 module:depends("disco"); |
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29 |
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30 -- namespace |
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31 local xmlns_http_upload = "urn:xmpp:http:upload"; |
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32 |
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33 module:add_feature(xmlns_http_upload); |
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34 |
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35 -- state |
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36 local pending_slots = module:shared("upload_slots"); |
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37 |
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38 local storage_path = module:get_option_string(module.name .. "_path", join_path(prosody.paths.data, module.name)); |
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39 lfs.mkdir(storage_path); |
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40 |
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41 -- hooks |
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42 module:hook("iq/host/"..xmlns_http_upload..":request", function (event) |
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43 local stanza, origin = event.stanza, event.origin; |
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44 local request = stanza.tags[1]; |
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45 -- local clients only |
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46 if origin.type ~= "c2s" then |
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47 origin.send(st.error_reply(stanza, "cancel", "not-authorized")); |
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48 return true; |
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49 end |
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50 -- validate |
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51 local filename = request:get_child_text("filename"); |
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52 if not filename or filename:find("/") then |
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53 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid filename")); |
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54 return true; |
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55 end |
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56 local filesize = tonumber(request:get_child_text("size")); |
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57 if not filesize then |
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58 origin.send(st.error_reply(stanza, "modify", "bad-request", "Missing or invalid file size")); |
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59 return true; |
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60 elseif filesize > file_size_limit then |
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61 origin.send(st.error_reply(stanza, "modify", "not-acceptable", "File too large", |
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62 st.stanza("file-too-large", {xmlns=xmlns_http_upload}) |
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63 :tag("max-size"):text(tostring(file_size_limit)))); |
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64 return true; |
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65 end |
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66 local reply = st.reply(stanza); |
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67 reply:tag("slot", { xmlns = xmlns_http_upload }); |
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68 local random = uuid(); |
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69 pending_slots[random.."/"..filename] = origin.full_jid; |
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70 local url = module:http_url() .. "/" .. random .. "/" .. urlencode(filename); |
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71 reply:tag("get"):text(url):up(); |
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72 reply:tag("put"):text(url):up(); |
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73 origin.send(reply); |
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74 return true; |
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75 end); |
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76 |
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77 -- http service |
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78 local function upload_data(event, path) |
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79 if not pending_slots[path] then |
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80 return 401; |
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81 end |
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82 local random, filename = path:match("^([^/]+)/([^/]+)$"); |
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83 if not random then |
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84 return 400; |
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85 end |
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86 if #event.request.body > file_size_limit then |
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87 module:log("error", "Uploaded file too large %d bytes", #event.request.body); |
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88 return 400; |
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89 end |
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90 local dirname = join_path(storage_path, random); |
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91 if not lfs.mkdir(dirname) then |
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92 module:log("error", "Could not create directory %s for upload", dirname); |
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93 return 500; |
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94 end |
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95 local full_filename = join_path(dirname, filename); |
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96 local fh, ferr = io.open(full_filename, "w"); |
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97 if not fh then |
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98 module:log("error", "Could not open file %s for upload: %s", full_filename, ferr); |
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99 return 500; |
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100 end |
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101 local ok, err = fh:write(event.request.body); |
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102 if not ok then |
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103 module:log("error", "Could not write to file %s for upload: %s", full_filename, err); |
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104 os.remove(full_filename); |
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105 return 500; |
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106 end |
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107 ok, err = fh:close(); |
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108 if not ok then |
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109 module:log("error", "Could not write to file %s for upload: %s", full_filename, err); |
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110 os.remove(full_filename); |
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111 return 500; |
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112 end |
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113 module:log("info", "File uploaded by %s to slot %s", pending_slots[path], random); |
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114 pending_slots[path] = nil; |
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115 return 200; |
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116 end |
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117 |
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118 -- FIXME Duplicated from net.http.server |
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119 |
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120 local codes = require "net.http.codes"; |
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121 local headerfix = setmetatable({}, { |
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122 __index = function(t, k) |
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123 local v = "\r\n"..k:gsub("_", "-"):gsub("%f[%w].", s_upper)..": "; |
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124 t[k] = v; |
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125 return v; |
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126 end |
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127 }); |
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128 |
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129 local function send_response_sans_body(response, body) |
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130 if response.finished then return; end |
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131 response.finished = true; |
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132 response.conn._http_open_response = nil; |
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133 |
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134 local status_line = "HTTP/"..response.request.httpversion.." "..(response.status or codes[response.status_code]); |
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135 local headers = response.headers; |
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136 body = body or response.body or ""; |
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137 headers.content_length = #body; |
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138 |
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139 local output = { status_line }; |
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140 for k,v in pairs(headers) do |
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141 t_insert(output, headerfix[k]..v); |
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142 end |
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143 t_insert(output, "\r\n\r\n"); |
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144 -- Here we *don't* add the body to the output |
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145 |
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146 response.conn:write(t_concat(output)); |
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147 if response.on_destroy then |
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148 response:on_destroy(); |
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149 response.on_destroy = nil; |
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150 end |
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151 if response.persistent then |
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152 response:finish_cb(); |
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153 else |
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154 response.conn:close(); |
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155 end |
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156 end |
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157 |
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158 local serve_uploaded_files = module:depends("http_files").serve(storage_path); |
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159 |
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160 local function serve_head(event, path) |
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161 event.response.send = send_response_sans_body; |
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162 return serve_uploaded_files(event, path); |
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163 end |
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164 |
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165 local function serve_hello(event) |
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166 event.response.headers.content_type = "text/html;charset=utf-8" |
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167 return "<!DOCTYPE html>\n<h1>Hello from mod_"..module.name.."!</h1>\n"; |
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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 ["GET"] = serve_hello; |
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173 ["GET /"] = serve_hello; |
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174 ["GET /*"] = serve_uploaded_files; |
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175 ["HEAD /*"] = serve_head; |
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176 ["PUT /*"] = upload_data; |
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177 }; |
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178 }); |
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179 |
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180 module:log("info", "URL: <%s>; Storage path: %s", module:http_url(), storage_path); |