Mercurial > prosody-modules
annotate mod_http_upload/mod_http_upload.lua @ 2332:c2cf5b40b66d
mod_http_upload_external: Variant of mod_http_upload that delegates HTTP handling to other server using signed URLs
author | Kim Alvefur <zash@zash.se> |
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date | Thu, 13 Oct 2016 18:57:15 +0200 |
parents | 827f01cbf6ba |
children | 7f9ff36dc8d5 |
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 url = require "socket.url"; |
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15 local dataform = require "util.dataforms".new; |
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16 local t_concat = table.concat; |
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17 local t_insert = table.insert; |
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18 local s_upper = string.upper; |
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19 |
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20 local function join_path(a, b) |
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21 return a .. package.config:sub(1,1) .. b; |
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22 end |
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23 |
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24 -- config |
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25 local file_size_limit = module:get_option_number(module.name .. "_file_size_limit", 1024 * 1024); -- 1 MB |
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26 |
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27 --- sanity |
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28 local parser_body_limit = module:context("*"):get_option_number("http_max_content_size", 10*1024*1024); |
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29 if file_size_limit > parser_body_limit then |
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30 module:log("warn", "%s_file_size_limit exceeds HTTP parser limit on body size, capping file size to %d B", module.name, parser_body_limit); |
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31 file_size_limit = parser_body_limit; |
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32 end |
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33 |
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34 -- depends |
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35 module:depends("http"); |
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36 module:depends("disco"); |
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37 |
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38 -- namespace |
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39 local xmlns_http_upload = "urn:xmpp:http:upload"; |
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40 |
2287 | 41 -- identity and feature advertising |
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42 module:add_identity("store", "file", module:get_option_string("name", "HTTP File Upload")) |
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43 module:add_feature(xmlns_http_upload); |
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44 |
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45 module:add_extension(dataform { |
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46 { name = "FORM_TYPE", type = "hidden", value = xmlns_http_upload }, |
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47 { name = "max-file-size", type = "text-single" }, |
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48 }:form({ ["max-file-size"] = tostring(file_size_limit) }, "result")); |
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49 |
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50 -- state |
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51 local pending_slots = module:shared("upload_slots"); |
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52 |
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53 local storage_path = module:get_option_string(module.name .. "_path", join_path(prosody.paths.data, module.name)); |
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54 lfs.mkdir(storage_path); |
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55 |
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56 -- hooks |
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57 module:hook("iq/host/"..xmlns_http_upload..":request", function (event) |
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58 local stanza, origin = event.stanza, event.origin; |
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59 local request = stanza.tags[1]; |
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60 -- local clients only |
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61 if origin.type ~= "c2s" then |
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62 module:log("debug", "Request for upload slot from a %s", origin.type); |
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63 origin.send(st.error_reply(stanza, "cancel", "not-authorized")); |
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64 return true; |
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65 end |
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66 -- validate |
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67 local filename = request:get_child_text("filename"); |
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68 if not filename or filename:find("/") then |
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69 module:log("debug", "Filename %q not allowed", filename or ""); |
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70 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid filename")); |
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71 return true; |
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72 end |
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73 local filesize = tonumber(request:get_child_text("size")); |
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74 if not filesize then |
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75 module:log("debug", "Missing file size"); |
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76 origin.send(st.error_reply(stanza, "modify", "bad-request", "Missing or invalid file size")); |
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77 return true; |
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78 elseif filesize > file_size_limit then |
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79 module:log("debug", "File too large (%d > %d)", filesize, file_size_limit); |
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80 origin.send(st.error_reply(stanza, "modify", "not-acceptable", "File too large", |
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81 st.stanza("file-too-large", {xmlns=xmlns_http_upload}) |
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82 :tag("max-size"):text(tostring(file_size_limit)))); |
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83 return true; |
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84 end |
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85 local reply = st.reply(stanza); |
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86 reply:tag("slot", { xmlns = xmlns_http_upload }); |
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87 local random = uuid(); |
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88 pending_slots[random.."/"..filename] = origin.full_jid; |
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89 local base_url = module:http_url(); |
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90 local slot_url = url.parse(base_url); |
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91 slot_url.path = url.parse_path(slot_url.path or "/"); |
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92 t_insert(slot_url.path, random); |
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93 t_insert(slot_url.path, filename); |
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94 slot_url.path.is_directory = false; |
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95 slot_url.path = url.build_path(slot_url.path); |
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96 slot_url = url.build(slot_url); |
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97 reply:tag("get"):text(slot_url):up(); |
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98 reply:tag("put"):text(slot_url):up(); |
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99 origin.send(reply); |
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100 origin.log("debug", "Given upload slot %q", random); |
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101 return true; |
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102 end); |
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103 |
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104 -- http service |
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|
105 local function upload_data(event, path) |
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|
106 if not pending_slots[path] then |
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107 module:log("warn", "Attempt to upload to unknown slot %q", path); |
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108 return; -- 404 |
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109 end |
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110 local random, filename = path:match("^([^/]+)/([^/]+)$"); |
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111 if not random then |
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112 module:log("warn", "Invalid file path %q", path); |
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113 return 400; |
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114 end |
1851
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115 if #event.request.body > file_size_limit then |
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116 module:log("warn", "Uploaded file too large %d bytes", #event.request.body); |
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117 return 400; |
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118 end |
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119 local dirname = join_path(storage_path, random); |
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|
120 if not lfs.mkdir(dirname) then |
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121 module:log("warn", "Could not create directory %s for upload", dirname); |
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122 return 500; |
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123 end |
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124 local full_filename = join_path(dirname, filename); |
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125 local fh, ferr = io.open(full_filename, "w"); |
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126 if not fh then |
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127 module:log("error", "Could not open file %s for upload: %s", full_filename, ferr); |
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128 return 500; |
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129 end |
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130 local ok, err = fh:write(event.request.body); |
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131 if not ok then |
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132 module:log("error", "Could not write to file %s for upload: %s", full_filename, err); |
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133 os.remove(full_filename); |
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134 return 500; |
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135 end |
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136 ok, err = fh:close(); |
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137 if not ok then |
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138 module:log("error", "Could not write to file %s for upload: %s", full_filename, err); |
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139 os.remove(full_filename); |
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140 return 500; |
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141 end |
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142 module:log("info", "File uploaded by %s to slot %s", pending_slots[path], random); |
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|
143 pending_slots[path] = nil; |
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144 return 200; |
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145 end |
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|
146 |
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147 -- FIXME Duplicated from net.http.server |
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148 |
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149 local codes = require "net.http.codes"; |
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150 local headerfix = setmetatable({}, { |
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151 __index = function(t, k) |
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|
152 local v = "\r\n"..k:gsub("_", "-"):gsub("%f[%w].", s_upper)..": "; |
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153 t[k] = v; |
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154 return v; |
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155 end |
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156 }); |
1772
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|
157 |
1912
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diff
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|
158 local function send_response_sans_body(response, body) |
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diff
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|
159 if response.finished then return; end |
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diff
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|
160 response.finished = true; |
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diff
changeset
|
161 response.conn._http_open_response = nil; |
2065
624e3fed6f92
mod_http_upload: Trim trailing whitespace
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2053
diff
changeset
|
162 |
1912
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diff
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|
163 local status_line = "HTTP/"..response.request.httpversion.." "..(response.status or codes[response.status_code]); |
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diff
changeset
|
164 local headers = response.headers; |
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|
165 body = body or response.body or ""; |
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diff
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|
166 headers.content_length = #body; |
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diff
changeset
|
167 |
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diff
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|
168 local output = { status_line }; |
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diff
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|
169 for k,v in pairs(headers) do |
24c22cbb86e4
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diff
changeset
|
170 t_insert(output, headerfix[k]..v); |
1905
43fac0c2c772
mod_http_upload: Fix HEAD requests
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parents:
1874
diff
changeset
|
171 end |
1912
24c22cbb86e4
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diff
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|
172 t_insert(output, "\r\n\r\n"); |
24c22cbb86e4
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diff
changeset
|
173 -- Here we *don't* add the body to the output |
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diff
changeset
|
174 |
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diff
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|
175 response.conn:write(t_concat(output)); |
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diff
changeset
|
176 if response.on_destroy then |
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diff
changeset
|
177 response:on_destroy(); |
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diff
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|
178 response.on_destroy = nil; |
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diff
changeset
|
179 end |
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diff
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|
180 if response.persistent then |
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diff
changeset
|
181 response:finish_cb(); |
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diff
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|
182 else |
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diff
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|
183 response.conn:close(); |
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diff
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|
184 end |
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|
185 end |
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diff
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|
186 |
1912
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|
187 local serve_uploaded_files = module:depends("http_files").serve(storage_path); |
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|
188 |
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|
189 local function serve_head(event, path) |
1912
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diff
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|
190 event.response.send = send_response_sans_body; |
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|
191 return serve_uploaded_files(event, path); |
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diff
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|
192 end |
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diff
changeset
|
193 |
1942
ff95d983940c
mod_http_upload: Say Hello to anyone opening the "bare" HTTP URL (helpful to show that module is loaded correctly)
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1914
diff
changeset
|
194 local function serve_hello(event) |
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diff
changeset
|
195 event.response.headers.content_type = "text/html;charset=utf-8" |
ff95d983940c
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diff
changeset
|
196 return "<!DOCTYPE html>\n<h1>Hello from mod_"..module.name.."!</h1>\n"; |
ff95d983940c
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1914
diff
changeset
|
197 end |
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1914
diff
changeset
|
198 |
1772
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diff
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|
199 module:provides("http", { |
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diff
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|
200 route = { |
1942
ff95d983940c
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parents:
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diff
changeset
|
201 ["GET"] = serve_hello; |
ff95d983940c
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diff
changeset
|
202 ["GET /"] = serve_hello; |
1772
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diff
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|
203 ["GET /*"] = serve_uploaded_files; |
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diff
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|
204 ["HEAD /*"] = serve_head; |
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diff
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|
205 ["PUT /*"] = upload_data; |
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parents:
diff
changeset
|
206 }; |
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parents:
diff
changeset
|
207 }); |
1849
5244c9b0b297
mod_http_upload: Log a message with the upload URL and storage path for easy discovery
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parents:
1848
diff
changeset
|
208 |
5244c9b0b297
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Kim Alvefur <zash@zash.se>
parents:
1848
diff
changeset
|
209 module:log("info", "URL: <%s>; Storage path: %s", module:http_url(), storage_path); |