prosody
f31bb79f51d7
net/http/files.lua

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net/http/files.lua @ 12271:f31bb79f51d7

tools: Allow processing instructions in some XML parsing tools IANA registry files have XSLT references, which are harmless to ignore.
author Kim Alvefur <zash@zash.se>
date Fri, 04 Feb 2022 21:20:48 +0100
parent 11658:36942fa001b4
child 12974:ba409c67353b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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Matthew Wild <mwild1@gmail.com>
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diff changeset
1 -- Prosody IM
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b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
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2 -- Copyright (C) 2008-2010 Matthew Wild
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Matthew Wild <mwild1@gmail.com>
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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Florian Zeitz <florob@babelmonkeys.de>
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4 --
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Matthew Wild <mwild1@gmail.com>
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5 -- This project is MIT/X11 licensed. Please see the
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1384
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6 -- COPYING file in the source package for more information.
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
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7 --
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
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8
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9 local server = require"net.http.server";
3353
cd3cbf361f8f mod_httpserver: Serve index.html if a request is made for a directory and it contains one (thanks Brian Cully)
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10 local lfs = require "lfs";
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a39f3681d685 net.http.files: Make into standalone library
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11 local new_cache = require "util.cache".new;
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12 local log = require "util.logger".init("net.http.files");
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13
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14 local os_date = os.date;
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15 local open = io.open;
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16 local stat = lfs.attributes;
5257
b125892e187c mod_http_files: Escape paths in redirects
Kim Alvefur <zash@zash.se>
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17 local build_path = require"socket.url".build_path;
6030
9b91242cc137 mod_http_files: Strip path separator from end of paths, was broken on Windows (thanks Junne)
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18 local path_sep = package.config:sub(1,1);
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19
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Waqas Hussain <waqas20@gmail.com>
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20
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21 local forbidden_chars_pattern = "[/%z]";
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22 if package.config:sub(1,1) == "\\" then
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23 forbidden_chars_pattern = "[/%z\001-\031\127\"*:<>?|]"
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24 end
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e9f07febafb3 mod_http_files: Santize the path relative to our base URL before translating it to a filesystem path, fixes a relative path traversal vulnerability
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26 local urldecode = require "util.http".urldecode;
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27 local function sanitize_path(path) --> util.paths or util.http?
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28 if not path then return end
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29 local out = {};
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31 local c = 0;
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32 for component in path:gmatch("([^/]+)") do
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33 component = urldecode(component);
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34 if component:find(forbidden_chars_pattern) then
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35 return nil;
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36 elseif component == ".." then
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37 if c <= 0 then
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38 return nil;
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39 end
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40 out[c] = nil;
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41 c = c - 1;
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42 elseif component ~= "." then
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43 c = c + 1;
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44 out[c] = component;
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45 end
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parents: 6873
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46 end
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47 if path:sub(-1,-1) == "/" then
20246b139607 mod_http_files: Preserve a trailing / in paths (fixes #639)
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48 out[c+1] = "";
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49 end
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50 return "/"..table.concat(out, "/");
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51 end
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parents: 6873
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52
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53 local function serve(opts)
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54 if type(opts) ~= "table" then -- assume path string
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55 opts = { path = opts };
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56 end
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57 local mime_map = opts.mime_map or { html = "text/html" };
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58 local cache = new_cache(opts.cache_size or 256);
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59 local cache_max_file_size = tonumber(opts.cache_max_file_size) or 1024
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6489d75ff1d6 mod_http_files: Silence luacheck warnings related to config variables
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60 -- luacheck: ignore 431
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61 local base_path = opts.path;
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62 local dir_indices = opts.index_files or { "index.html", "index.htm" };
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63 local directory_index = opts.directory_index;
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64 local function serve_file(event, path)
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65 local request, response = event.request, event.response;
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66 local sanitized_path = sanitize_path(path);
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67 if path and not sanitized_path then
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68 return 400;
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69 end
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70 path = sanitized_path;
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71 local orig_path = sanitize_path(request.path);
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dcc8ed11173c mod_http_files: Don't prepend / to path twice, sanitize path does this already
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72 local full_path = base_path .. (path or ""):gsub("/", path_sep);
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73 local attr = stat(full_path:match("^.*[^\\/]")); -- Strip trailing path separator because Windows
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74 if not attr then
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75 return 404;
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76 end
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77
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78 local request_headers, response_headers = request.headers, response.headers;
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79
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80 local last_modified = os_date('!%a, %d %b %Y %H:%M:%S GMT', attr.modification);
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81 response_headers.last_modified = last_modified;
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82
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83 local etag = ('"%x-%x-%x"'):format(attr.change or 0, attr.size or 0, attr.modification or 0);
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84 response_headers.etag = etag;
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85
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86 local if_none_match = request_headers.if_none_match
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87 local if_modified_since = request_headers.if_modified_since;
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88 if etag == if_none_match
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89 or (not if_none_match and last_modified == if_modified_since) then
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90 return 304;
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91 end
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92
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93 local data = cache:get(orig_path);
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diff changeset
94 if data and data.etag == etag then
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95 response_headers.content_type = data.content_type;
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96 data = data.data;
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97 cache:set(orig_path, data);
5264
700ff21a0451 mod_http_files: Work with non-wildcard-routes. Key cache on the original HTTP path.
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diff changeset
98 elseif attr.mode == "directory" and path then
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99 if full_path:sub(-1) ~= "/" then
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100 local dir_path = { is_absolute = true, is_directory = true };
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101 for dir in orig_path:gmatch("[^/]+") do dir_path[#dir_path+1]=dir; end
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102 response_headers.location = build_path(dir_path);
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103 return 301;
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104 end
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105 for i=1,#dir_indices do
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106 if stat(full_path..dir_indices[i], "mode") == "file" then
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107 return serve_file(event, path..dir_indices[i]);
5238
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108 end
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diff changeset
109 end
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110
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diff changeset
111 if directory_index then
736e7ec8cd2e mod_http_files: Replace file listing with an event, allowing a different plugin to generate it
Kim Alvefur <zash@zash.se>
parents: 5262
diff changeset
112 data = server._events.fire_event("directory-index", { path = request.path, full_path = full_path });
736e7ec8cd2e mod_http_files: Replace file listing with an event, allowing a different plugin to generate it
Kim Alvefur <zash@zash.se>
parents: 5262
diff changeset
113 end
736e7ec8cd2e mod_http_files: Replace file listing with an event, allowing a different plugin to generate it
Kim Alvefur <zash@zash.se>
parents: 5262
diff changeset
114 if not data then
5262
4e58fde55594 mod_http_files: Export function can be used by other modules to serve files. Don't serve files by default unless http_files_dir is set
Kim Alvefur <zash@zash.se>
parents: 5261
diff changeset
115 return 403;
4e58fde55594 mod_http_files: Export function can be used by other modules to serve files. Don't serve files by default unless http_files_dir is set
Kim Alvefur <zash@zash.se>
parents: 5261
diff changeset
116 end
8757
861a7d6c12d8 mod_http_files: Correct cache insertion (fixes #1130)
Kim Alvefur <zash@zash.se>
parents: 7991
diff changeset
117 cache:set(orig_path, { data = data, content_type = mime_map.html; etag = etag; });
5263
736e7ec8cd2e mod_http_files: Replace file listing with an event, allowing a different plugin to generate it
Kim Alvefur <zash@zash.se>
parents: 5262
diff changeset
118 response_headers.content_type = mime_map.html;
5262
4e58fde55594 mod_http_files: Export function can be used by other modules to serve files. Don't serve files by default unless http_files_dir is set
Kim Alvefur <zash@zash.se>
parents: 5261
diff changeset
119
4e58fde55594 mod_http_files: Export function can be used by other modules to serve files. Don't serve files by default unless http_files_dir is set
Kim Alvefur <zash@zash.se>
parents: 5261
diff changeset
120 else
4e58fde55594 mod_http_files: Export function can be used by other modules to serve files. Don't serve files by default unless http_files_dir is set
Kim Alvefur <zash@zash.se>
parents: 5261
diff changeset
121 local f, err = open(full_path, "rb");
7491
491975f5d383 mod_http_files: Send larger files using new file handle API
Kim Alvefur <zash@zash.se>
parents: 7490
diff changeset
122 if not f then
9949
a39f3681d685 net.http.files: Make into standalone library
Kim Alvefur <zash@zash.se>
parents: 9948
diff changeset
123 log("debug", "Could not open %s. Error was %s", full_path, err);
5262
4e58fde55594 mod_http_files: Export function can be used by other modules to serve files. Don't serve files by default unless http_files_dir is set
Kim Alvefur <zash@zash.se>
parents: 5261
diff changeset
124 return 403;
4e58fde55594 mod_http_files: Export function can be used by other modules to serve files. Don't serve files by default unless http_files_dir is set
Kim Alvefur <zash@zash.se>
parents: 5261
diff changeset
125 end
5269
7bc52402966d mod_http_files: Fix sending Content-Type for index files
Kim Alvefur <zash@zash.se>
parents: 5268
diff changeset
126 local ext = full_path:match("%.([^./]+)$");
5262
4e58fde55594 mod_http_files: Export function can be used by other modules to serve files. Don't serve files by default unless http_files_dir is set
Kim Alvefur <zash@zash.se>
parents: 5261
diff changeset
127 local content_type = ext and mime_map[ext];
7491
491975f5d383 mod_http_files: Send larger files using new file handle API
Kim Alvefur <zash@zash.se>
parents: 7490
diff changeset
128 response_headers.content_type = content_type;
491975f5d383 mod_http_files: Send larger files using new file handle API
Kim Alvefur <zash@zash.se>
parents: 7490
diff changeset
129 if attr.size > cache_max_file_size then
10327
34f7a0e8fa59 net.http.files: Explicitly convert number to string, avoiding implicit coercion
Kim Alvefur <zash@zash.se>
parents: 10065
diff changeset
130 response_headers.content_length = ("%d"):format(attr.size);
9949
a39f3681d685 net.http.files: Make into standalone library
Kim Alvefur <zash@zash.se>
parents: 9948
diff changeset
131 log("debug", "%d > cache_max_file_size", attr.size);
7491
491975f5d383 mod_http_files: Send larger files using new file handle API
Kim Alvefur <zash@zash.se>
parents: 7490
diff changeset
132 return response:send_file(f);
491975f5d383 mod_http_files: Send larger files using new file handle API
Kim Alvefur <zash@zash.se>
parents: 7490
diff changeset
133 else
491975f5d383 mod_http_files: Send larger files using new file handle API
Kim Alvefur <zash@zash.se>
parents: 7490
diff changeset
134 data = f:read("*a");
491975f5d383 mod_http_files: Send larger files using new file handle API
Kim Alvefur <zash@zash.se>
parents: 7490
diff changeset
135 f:close();
491975f5d383 mod_http_files: Send larger files using new file handle API
Kim Alvefur <zash@zash.se>
parents: 7490
diff changeset
136 end
7490
b75b08af7a78 mod_http_files: Switch to use util.cache for cache
Kim Alvefur <zash@zash.se>
parents: 7487
diff changeset
137 cache:set(orig_path, { data = data; content_type = content_type; etag = etag });
5238
0cc0359d8c39 mod_http_files: Generate simple directory index.
Kim Alvefur <zash@zash.se>
parents: 5237
diff changeset
138 end
0cc0359d8c39 mod_http_files: Generate simple directory index.
Kim Alvefur <zash@zash.se>
parents: 5237
diff changeset
139
5262
4e58fde55594 mod_http_files: Export function can be used by other modules to serve files. Don't serve files by default unless http_files_dir is set
Kim Alvefur <zash@zash.se>
parents: 5261
diff changeset
140 return response:send(data);
3353
cd3cbf361f8f mod_httpserver: Serve index.html if a request is made for a directory and it contains one (thanks Brian Cully)
Matthew Wild <mwild1@gmail.com>
parents: 2925
diff changeset
141 end
5233
342c46e62f50 mod_http_files: Return 404 faster if file does not exist
Kim Alvefur <zash@zash.se>
parents: 5232
diff changeset
142
5262
4e58fde55594 mod_http_files: Export function can be used by other modules to serve files. Don't serve files by default unless http_files_dir is set
Kim Alvefur <zash@zash.se>
parents: 5261
diff changeset
143 return serve_file;
1667
c7bb2264e3b8 mod_httpserver: Set default file handler (you can now request static files as /*) and restructure code a bit
Matthew Wild <mwild1@gmail.com>
parents: 1552
diff changeset
144 end
1770
3e17002221eb mod_httpserver: Backport from trunk more thorough validation of URLs prior to processing
Matthew Wild <mwild1@gmail.com>
parents: 1552
diff changeset
145
9949
a39f3681d685 net.http.files: Make into standalone library
Kim Alvefur <zash@zash.se>
parents: 9948
diff changeset
146 return {
a39f3681d685 net.http.files: Make into standalone library
Kim Alvefur <zash@zash.se>
parents: 9948
diff changeset
147 serve = serve;
a39f3681d685 net.http.files: Make into standalone library
Kim Alvefur <zash@zash.se>
parents: 9948
diff changeset
148 }
1667
c7bb2264e3b8 mod_httpserver: Set default file handler (you can now request static files as /*) and restructure code a bit
Matthew Wild <mwild1@gmail.com>
parents: 1552
diff changeset
149