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annotate mod_http_upload/mod_http_upload.lua @ 1935:dd509940ae49

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mod_support_contact/README: Update compatibility section
author Kim Alvefur <zash@zash.se>
date Mon, 26 Oct 2015 14:26:25 +0100
parents b01d60dfa405
children ff95d983940c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1772
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
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1 -- mod_http_upload
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2 --
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
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3 -- Copyright (C) 2015 Kim Alvefur
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4 --
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Kim Alvefur <zash@zash.se>
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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;
1912
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
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parents: 1906
diff changeset
14 local t_concat = table.concat;
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Kim Alvefur <zash@zash.se>
parents: 1906
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15 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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16 local s_upper = string.upper;
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17
1815
abacf6698d97 mod_http_upload: Include join_path function, should make it work with 0.9.x
Kim Alvefur <zash@zash.se>
parents: 1805
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18 local function join_path(a, b)
1817
1971ff719e72 mod_http_upload: Fix typo (thanks mo)
Kim Alvefur <zash@zash.se>
parents: 1815
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19 return a .. package.config:sub(1,1) .. b;
1815
abacf6698d97 mod_http_upload: Include join_path function, should make it work with 0.9.x
Kim Alvefur <zash@zash.se>
parents: 1805
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20 end
abacf6698d97 mod_http_upload: Include join_path function, should make it work with 0.9.x
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parents: 1805
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21
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parents: 1850
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22 -- config
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parents: 1850
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23 local file_size_limit = module:get_option_number(module.name .. "_file_size_limit", 10 * 1024 * 1024); -- 10 MB
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24
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25 -- depends
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26 module:depends("http");
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25c28644fae8 mod_http_upload: Depend on mod_disco, allows it to be discovered when set up as a component
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parents: 1772
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27 module:depends("disco");
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28
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29 -- namespace
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8ef500508c59 mod_http_upload.lua: use official namespace from XEP-0363
Michael Töglhofer <michael@toeglhofer.net>
parents: 1851
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30 local xmlns_http_upload = "urn:xmpp:http:upload";
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31
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32 module:add_feature(xmlns_http_upload);
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33
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34 -- state
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35 local pending_slots = module:shared("upload_slots");
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36
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37 local storage_path = join_path(prosody.paths.data, module.name);
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38 lfs.mkdir(storage_path);
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39
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40 -- hooks
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Kim Alvefur <zash@zash.se>
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41 module:hook("iq/host/"..xmlns_http_upload..":request", function (event)
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Kim Alvefur <zash@zash.se>
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42 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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43 local request = stanza.tags[1];
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44 -- local clients only
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Kim Alvefur <zash@zash.se>
parents:
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45 if origin.type ~= "c2s" then
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
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46 origin.send(st.error_reply(stanza, "cancel", "not-authorized"));
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47 return true;
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48 end
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Kim Alvefur <zash@zash.se>
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49 -- validate
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50 local filename = request:get_child_text("filename");
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51 if not filename or filename:find("/") then
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parents: 1849
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52 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid filename"));
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53 return true;
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54 end
1851
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parents: 1850
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55 local filesize = tonumber(request:get_child_text("size"));
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parents: 1850
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56 if not filesize then
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parents: 1850
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57 origin.send(st.error_reply(stanza, "modify", "bad-request", "Missing or invalid file size"));
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parents: 1850
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58 return true;
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parents: 1850
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59 elseif filesize > file_size_limit then
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parents: 1850
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60 origin.send(st.error_reply(stanza, "modify", "not-acceptable", "File too large",
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parents: 1850
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61 st.stanza("file-too-large", {xmlns=xmlns_http_upload})
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parents: 1850
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62 :tag("max-size"):text(tostring(file_size_limit))));
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parents: 1850
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63 return true;
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parents: 1850
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64 end
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Kim Alvefur <zash@zash.se>
parents:
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65 local reply = st.reply(stanza);
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Kim Alvefur <zash@zash.se>
parents:
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66 reply:tag("slot", { xmlns = xmlns_http_upload });
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Kim Alvefur <zash@zash.se>
parents:
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67 local random = uuid();
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Kim Alvefur <zash@zash.se>
parents:
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68 pending_slots[random.."/"..filename] = origin.full_jid;
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Kim Alvefur <zash@zash.se>
parents:
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69 local url = module:http_url() .. "/" .. random .. "/" .. filename;
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Kim Alvefur <zash@zash.se>
parents:
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70 reply:tag("get"):text(url):up();
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parents:
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71 reply:tag("put"):text(url):up();
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72 origin.send(reply);
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73 return true;
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Kim Alvefur <zash@zash.se>
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74 end);
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parents:
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75
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Kim Alvefur <zash@zash.se>
parents:
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76 -- http service
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Kim Alvefur <zash@zash.se>
parents:
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77 local function upload_data(event, path)
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parents:
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78 if not pending_slots[path] then
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Kim Alvefur <zash@zash.se>
parents:
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79 return 401;
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Kim Alvefur <zash@zash.se>
parents:
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80 end
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Kim Alvefur <zash@zash.se>
parents:
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81 local random, filename = path:match("^([^/]+)/([^/]+)$");
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
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parents:
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82 if not random then
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
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83 return 400;
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parents:
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84 end
1851
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parents: 1850
diff changeset
85 if #event.request.body > file_size_limit then
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Kim Alvefur <zash@zash.se>
parents: 1850
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86 module:log("error", "Uploaded file too large %d bytes", #event.request.body);
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Kim Alvefur <zash@zash.se>
parents: 1850
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87 return 400;
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Kim Alvefur <zash@zash.se>
parents: 1850
diff changeset
88 end
1772
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Kim Alvefur <zash@zash.se>
parents:
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89 local dirname = join_path(storage_path, random);
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parents:
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90 if not lfs.mkdir(dirname) then
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Kim Alvefur <zash@zash.se>
parents:
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91 module:log("error", "Could not create directory %s for upload", dirname);
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parents:
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92 return 500;
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Kim Alvefur <zash@zash.se>
parents:
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93 end
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Kim Alvefur <zash@zash.se>
parents:
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94 local full_filename = join_path(dirname, filename);
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Kim Alvefur <zash@zash.se>
parents:
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95 local fh, ferr = io.open(full_filename, "w");
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parents:
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96 if not fh then
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
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parents:
diff changeset
97 module:log("error", "Could not open file %s for upload: %s", full_filename, ferr);
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Kim Alvefur <zash@zash.se>
parents:
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98 return 500;
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Kim Alvefur <zash@zash.se>
parents:
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99 end
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Kim Alvefur <zash@zash.se>
parents:
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100 local ok, err = fh:write(event.request.body);
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parents:
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101 if not ok then
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Kim Alvefur <zash@zash.se>
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diff changeset
102 module:log("error", "Could not write to file %s for upload: %s", full_filename, err);
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Kim Alvefur <zash@zash.se>
parents:
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103 os.remove(full_filename);
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parents:
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104 return 500;
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Kim Alvefur <zash@zash.se>
parents:
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105 end
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Kim Alvefur <zash@zash.se>
parents:
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106 ok, err = fh:close();
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
107 if not ok then
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Kim Alvefur <zash@zash.se>
parents:
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108 module:log("error", "Could not write to file %s for upload: %s", full_filename, err);
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Kim Alvefur <zash@zash.se>
parents:
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109 os.remove(full_filename);
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parents:
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110 return 500;
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Kim Alvefur <zash@zash.se>
parents:
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111 end
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Kim Alvefur <zash@zash.se>
parents:
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112 module:log("info", "File uploaded by %s to slot %s", pending_slots[path], random);
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Kim Alvefur <zash@zash.se>
parents:
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113 pending_slots[path] = nil;
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Kim Alvefur <zash@zash.se>
parents:
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114 return 200;
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Kim Alvefur <zash@zash.se>
parents:
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115 end
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parents:
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116
1912
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
Kim Alvefur <zash@zash.se>
parents: 1906
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117 -- FIXME Duplicated from net.http.server
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Kim Alvefur <zash@zash.se>
parents: 1906
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118
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
119 local codes = require "net.http.codes";
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Kim Alvefur <zash@zash.se>
parents: 1906
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120 local headerfix = setmetatable({}, {
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
121 __index = function(t, k)
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parents: 1906
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122 local v = "\r\n"..k:gsub("_", "-"):gsub("%f[%w].", s_upper)..": ";
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
123 t[k] = v;
24c22cbb86e4 mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
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parents: 1906
diff changeset
124 return v;
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
125 end
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Kim Alvefur <zash@zash.se>
parents: 1906
diff changeset
126 });
1772
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127
1912
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128 local function send_response_sans_body(response, body)
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129 if response.finished then return; end
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130 response.finished = true;
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131 response.conn._http_open_response = nil;
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132
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133 local status_line = "HTTP/"..response.request.httpversion.." "..(response.status or codes[response.status_code]);
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parents: 1906
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134 local headers = response.headers;
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135 body = body or response.body or "";
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136 headers.content_length = #body;
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137
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138 local output = { status_line };
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139 for k,v in pairs(headers) do
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parents: 1906
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140 t_insert(output, headerfix[k]..v);
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43fac0c2c772 mod_http_upload: Fix HEAD requests
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parents: 1874
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141 end
1912
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142 t_insert(output, "\r\n\r\n");
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parents: 1906
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143 -- Here we *don't* add the body to the output
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144
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145 response.conn:write(t_concat(output));
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146 if response.on_destroy then
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147 response:on_destroy();
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148 response.on_destroy = nil;
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parents: 1906
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149 end
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parents: 1906
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150 if response.persistent then
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151 response:finish_cb();
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parents: 1906
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152 else
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parents: 1906
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153 response.conn:close();
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parents: 1906
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154 end
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155 end
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156
1912
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parents: 1906
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157 local serve_uploaded_files = module:depends("http_files").serve(storage_path);
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158
1772
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159 local function serve_head(event, path)
1912
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parents: 1906
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160 event.response.send = send_response_sans_body;
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161 return serve_uploaded_files(event, path);
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162 end
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parents:
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163
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parents:
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164 module:provides("http", {
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165 route = {
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166 ["GET /*"] = serve_uploaded_files;
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167 ["HEAD /*"] = serve_head;
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parents:
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168 ["PUT /*"] = upload_data;
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parents:
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169 };
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parents:
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170 });
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
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171
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Kim Alvefur <zash@zash.se>
parents: 1848
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172 module:log("info", "URL: <%s>; Storage path: %s", module:http_url(), storage_path);