prosody-modules
e654d6e1fb50
mod_http_upload/mod_http_upload.lua

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mod_http_upload/mod_http_upload.lua @ 2208:e654d6e1fb50

mod_http_upload: Log if file size exceeds limit
author Kim Alvefur <zash@zash.se>
date Sun, 12 Jun 2016 03:21:48 +0200
parent 2207:c45ad4b7aaa3
child 2231:131075a3bf0d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1772
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
1 -- mod_http_upload
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2 --
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parents:
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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.
2065
624e3fed6f92 mod_http_upload: Trim trailing whitespace
Kim Alvefur <zash@zash.se>
parents: 2053
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6 --
1772
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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;
1966
3b748666ff97 mod_http_upload: URL-encode filename in case it contains characters that need escaping (thanks Thilo)
Kim Alvefur <zash@zash.se>
parents: 1942
diff changeset
14 local urlencode = require"util.http".urlencode;
2066
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parents: 2065
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15 local dataform = require "util.dataforms".new;
1912
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
16 local t_concat = table.concat;
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
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parents: 1906
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17 local t_insert = table.insert;
1914
b01d60dfa405 mod_http_upload: Add missing local of string.upper (Thanks Thilo)
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parents: 1912
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18 local s_upper = string.upper;
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19
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parents: 1805
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20 local function join_path(a, b)
1817
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parents: 1815
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21 return a .. package.config:sub(1,1) .. b;
1815
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parents: 1805
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22 end
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23
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24 -- config
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parents: 1967
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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 -- depends
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28 module:depends("http");
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29 module:depends("disco");
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30
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31 -- namespace
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parents: 1851
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32 local xmlns_http_upload = "urn:xmpp:http:upload";
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33
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34 module:add_feature(xmlns_http_upload);
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35
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36 module:add_extension(dataform {
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37 { name = "FORM_TYPE", type = "hidden", value = xmlns_http_upload },
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parents: 2065
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38 { name = "max-file-size", type = "text-single" },
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parents: 2065
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39 }:form({ ["max-file-size"] = tostring(file_size_limit) }, "result"));
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40
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41 -- state
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42 local pending_slots = module:shared("upload_slots");
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43
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2ce2b194d501 mod_http_upload: Make file system path configurable
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parents: 1966
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44 local storage_path = module:get_option_string(module.name .. "_path", join_path(prosody.paths.data, module.name));
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45 lfs.mkdir(storage_path);
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46
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47 -- hooks
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48 module:hook("iq/host/"..xmlns_http_upload..":request", function (event)
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parents:
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49 local stanza, origin = event.stanza, event.origin;
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e5243fa16210 mod_http_upload: Cache first-level child <request> in local variable
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parents: 1817
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50 local request = stanza.tags[1];
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51 -- local clients only
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52 if origin.type ~= "c2s" then
2207
c45ad4b7aaa3 mod_http_upload: Add additional debug logging
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parents: 2193
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53 module:log("debug", "Request for upload slot from a %s", origin.type);
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54 origin.send(st.error_reply(stanza, "cancel", "not-authorized"));
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55 return true;
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56 end
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Kim Alvefur <zash@zash.se>
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57 -- validate
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parents: 1817
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58 local filename = request:get_child_text("filename");
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59 if not filename or filename:find("/") then
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parents: 2193
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60 module:log("debug", "Filename %q not allowed", filename or "");
1850
e3a0ebe671cc mod_http_upload: Include failure reason in error response
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parents: 1849
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61 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid filename"));
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62 return true;
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63 end
1851
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parents: 1850
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64 local filesize = tonumber(request:get_child_text("size"));
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parents: 1850
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65 if not filesize then
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66 module:log("debug", "Missing file size");
1851
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67 origin.send(st.error_reply(stanza, "modify", "bad-request", "Missing or invalid file size"));
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68 return true;
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parents: 1850
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69 elseif filesize > file_size_limit then
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parents: 2207
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70 module:log("debug", "File too large (%d > %d)", filesize, file_size_limit);
1851
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parents: 1850
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71 origin.send(st.error_reply(stanza, "modify", "not-acceptable", "File too large",
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parents: 1850
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72 st.stanza("file-too-large", {xmlns=xmlns_http_upload})
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parents: 1850
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73 :tag("max-size"):text(tostring(file_size_limit))));
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parents: 1850
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74 return true;
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parents: 1850
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75 end
1772
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Kim Alvefur <zash@zash.se>
parents:
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76 local reply = st.reply(stanza);
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77 reply:tag("slot", { xmlns = xmlns_http_upload });
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Kim Alvefur <zash@zash.se>
parents:
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78 local random = uuid();
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Kim Alvefur <zash@zash.se>
parents:
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79 pending_slots[random.."/"..filename] = origin.full_jid;
1966
3b748666ff97 mod_http_upload: URL-encode filename in case it contains characters that need escaping (thanks Thilo)
Kim Alvefur <zash@zash.se>
parents: 1942
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80 local url = module:http_url() .. "/" .. random .. "/" .. urlencode(filename);
1772
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parents:
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81 reply:tag("get"):text(url):up();
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parents:
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82 reply:tag("put"):text(url):up();
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parents:
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83 origin.send(reply);
2207
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84 origin.log("debug", "Given upload slot %q", random);
1772
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parents:
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85 return true;
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86 end);
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87
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parents:
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88 -- http service
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Kim Alvefur <zash@zash.se>
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89 local function upload_data(event, path)
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90 if not pending_slots[path] then
2191
e47046abf568 mod_http_upload: Add more logging
Kim Alvefur <zash@zash.se>
parents: 2066
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91 module:log("warn", "Attempt to upload to unknown slot %q", path);
2193
40824a38d505 mod_http_upload: Return nil if no upload slot is found (should prevent conflicts between multiple instances on the same path)
Kim Alvefur <zash@zash.se>
parents: 2192
diff changeset
92 return; -- 404
1772
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93 end
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94 local random, filename = path:match("^([^/]+)/([^/]+)$");
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parents:
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95 if not random then
2207
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96 module:log("warn", "Invalid file path %q", path);
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97 return 400;
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98 end
1851
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parents: 1850
diff changeset
99 if #event.request.body > file_size_limit then
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parents: 2191
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100 module:log("warn", "Uploaded file too large %d bytes", #event.request.body);
1851
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101 return 400;
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102 end
1772
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parents:
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103 local dirname = join_path(storage_path, random);
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parents:
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104 if not lfs.mkdir(dirname) then
2192
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105 module:log("warn", "Could not create directory %s for upload", dirname);
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106 return 500;
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parents:
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107 end
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parents:
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108 local full_filename = join_path(dirname, filename);
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parents:
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109 local fh, ferr = io.open(full_filename, "w");
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parents:
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110 if not fh then
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111 module:log("error", "Could not open file %s for upload: %s", full_filename, ferr);
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parents:
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112 return 500;
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Kim Alvefur <zash@zash.se>
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113 end
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Kim Alvefur <zash@zash.se>
parents:
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114 local ok, err = fh:write(event.request.body);
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parents:
diff changeset
115 if not ok then
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Kim Alvefur <zash@zash.se>
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116 module:log("error", "Could not write to file %s for upload: %s", full_filename, err);
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parents:
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117 os.remove(full_filename);
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parents:
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118 return 500;
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parents:
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119 end
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Kim Alvefur <zash@zash.se>
parents:
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120 ok, err = fh:close();
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parents:
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121 if not ok then
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parents:
diff changeset
122 module:log("error", "Could not write to file %s for upload: %s", full_filename, err);
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
123 os.remove(full_filename);
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
124 return 500;
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
125 end
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
126 module:log("info", "File uploaded by %s to slot %s", pending_slots[path], random);
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
127 pending_slots[path] = nil;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
128 return 200;
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
129 end
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
130
1912
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
131 -- FIXME Duplicated from net.http.server
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parents: 1906
diff changeset
132
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
133 local codes = require "net.http.codes";
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
134 local headerfix = setmetatable({}, {
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
135 __index = function(t, k)
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
136 local v = "\r\n"..k:gsub("_", "-"):gsub("%f[%w].", s_upper)..": ";
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
137 t[k] = v;
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
138 return v;
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
139 end
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
140 });
1772
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
141
1912
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
142 local function send_response_sans_body(response, body)
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
143 if response.finished then return; end
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
144 response.finished = true;
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
145 response.conn._http_open_response = nil;
2065
624e3fed6f92 mod_http_upload: Trim trailing whitespace
Kim Alvefur <zash@zash.se>
parents: 2053
diff changeset
146
1912
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
147 local status_line = "HTTP/"..response.request.httpversion.." "..(response.status or codes[response.status_code]);
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
148 local headers = response.headers;
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
149 body = body or response.body or "";
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
150 headers.content_length = #body;
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
151
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
152 local output = { status_line };
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
153 for k,v in pairs(headers) do
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
154 t_insert(output, headerfix[k]..v);
1905
43fac0c2c772 mod_http_upload: Fix HEAD requests
Kim Alvefur <zash@zash.se>
parents: 1874
diff changeset
155 end
1912
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
156 t_insert(output, "\r\n\r\n");
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
157 -- Here we *don't* add the body to the output
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
158
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
159 response.conn:write(t_concat(output));
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
160 if response.on_destroy then
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
161 response:on_destroy();
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
162 response.on_destroy = nil;
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
163 end
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
164 if response.persistent then
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
165 response:finish_cb();
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
166 else
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
167 response.conn:close();
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
168 end
1772
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
169 end
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
170
1912
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
171 local serve_uploaded_files = module:depends("http_files").serve(storage_path);
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
172
1772
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
173 local function serve_head(event, path)
1912
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
174 event.response.send = send_response_sans_body;
1772
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
175 return serve_uploaded_files(event, path);
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
176 end
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
177
1942
ff95d983940c mod_http_upload: Say Hello to anyone opening the "bare" HTTP URL (helpful to show that module is loaded correctly)
Kim Alvefur <zash@zash.se>
parents: 1914
diff changeset
178 local function serve_hello(event)
ff95d983940c mod_http_upload: Say Hello to anyone opening the "bare" HTTP URL (helpful to show that module is loaded correctly)
Kim Alvefur <zash@zash.se>
parents: 1914
diff changeset
179 event.response.headers.content_type = "text/html;charset=utf-8"
ff95d983940c mod_http_upload: Say Hello to anyone opening the "bare" HTTP URL (helpful to show that module is loaded correctly)
Kim Alvefur <zash@zash.se>
parents: 1914
diff changeset
180 return "<!DOCTYPE html>\n<h1>Hello from mod_"..module.name.."!</h1>\n";
ff95d983940c mod_http_upload: Say Hello to anyone opening the "bare" HTTP URL (helpful to show that module is loaded correctly)
Kim Alvefur <zash@zash.se>
parents: 1914
diff changeset
181 end
ff95d983940c mod_http_upload: Say Hello to anyone opening the "bare" HTTP URL (helpful to show that module is loaded correctly)
Kim Alvefur <zash@zash.se>
parents: 1914
diff changeset
182
1772
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
183 module:provides("http", {
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
184 route = {
1942
ff95d983940c mod_http_upload: Say Hello to anyone opening the "bare" HTTP URL (helpful to show that module is loaded correctly)
Kim Alvefur <zash@zash.se>
parents: 1914
diff changeset
185 ["GET"] = serve_hello;
ff95d983940c mod_http_upload: Say Hello to anyone opening the "bare" HTTP URL (helpful to show that module is loaded correctly)
Kim Alvefur <zash@zash.se>
parents: 1914
diff changeset
186 ["GET /"] = serve_hello;
1772
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
187 ["GET /*"] = serve_uploaded_files;
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
188 ["HEAD /*"] = serve_head;
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
189 ["PUT /*"] = upload_data;
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
190 };
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
diff changeset
191 });
1849
5244c9b0b297 mod_http_upload: Log a message with the upload URL and storage path for easy discovery
Kim Alvefur <zash@zash.se>
parents: 1848
diff changeset
192
5244c9b0b297 mod_http_upload: Log a message with the upload URL and storage path for easy discovery
Kim Alvefur <zash@zash.se>
parents: 1848
diff changeset
193 module:log("info", "URL: <%s>; Storage path: %s", module:http_url(), storage_path);