1 f28d96d3 2021-01-25 op .\" Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3 3e4749f7 2020-10-02 op .\" Permission to use, copy, modify, and distribute this software for any
4 3e4749f7 2020-10-02 op .\" purpose with or without fee is hereby granted, provided that the above
5 3e4749f7 2020-10-02 op .\" copyright notice and this permission notice appear in all copies.
7 3e4749f7 2020-10-02 op .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 3e4749f7 2020-10-02 op .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 3e4749f7 2020-10-02 op .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
10 3e4749f7 2020-10-02 op .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 3e4749f7 2020-10-02 op .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
12 3e4749f7 2020-10-02 op .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
13 3e4749f7 2020-10-02 op .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14 39a7b611 2021-01-30 op .Dd $Mdocdate: January 30 2021$
19 714685c1 2021-01-30 op .Nd simple and secure Gemini server
24 15902770 2021-01-15 op .Op Fl c Ar config
25 8e8b2e25 2021-04-28 op .Op Fl P Ar pidfile
30 f28d96d3 2021-01-25 op .Op Fl d Pa certs-dir
31 f28d96d3 2021-01-25 op .Op Fl H Ar hostname
32 721e2325 2020-11-18 op .Op Fl p Ar port
33 f28d96d3 2021-01-25 op .Op Fl x Pa cgi
36 3e4749f7 2020-10-02 op .Sh DESCRIPTION
38 8ff40039 2021-05-24 op is a simple and minimal gemini server that can serve static files,
39 8ff40039 2021-05-24 op execute CGI scripts and talk to FastCGI applications.
40 eb699783 2021-01-18 op It can run without a configuration file with a limited set of features
44 3007f565 2021-02-04 op rereads the configuration file when it receives
47 eb699783 2021-01-18 op The options are as follows:
48 f28d96d3 2021-01-25 op .Bl -tag -width 14m
49 eb699783 2021-01-18 op .It Fl c Pa config
50 f28d96d3 2021-01-25 op Specify the configuration file.
52 46af8c6c 2021-01-27 op Stays and logs on the foreground.
54 eb699783 2021-01-18 op Check that the configuration is valid, but don't start the server.
55 8e8b2e25 2021-04-28 op .It Fl P Pa pidfile
58 8e8b2e25 2021-04-28 op pid to the given path.
61 eb699783 2021-01-18 op If no configuration file is given,
63 f28d96d3 2021-01-25 op will look for the following options
64 f28d96d3 2021-01-25 op .Bl -tag -width 14m
67 f28d96d3 2021-01-25 op .It Fl d Pa certs-path
68 f28d96d3 2021-01-25 op Directory where certificates for the config-less mode are stored.
70 f28d96d3 2021-01-25 op .Pa $XDG_DATA_HOME/gmid ,
72 f28d96d3 2021-01-25 op .Pa ~/.local/share/gmid .
73 71cf3975 2021-01-25 op .It Fl H Ar hostname
74 f28d96d3 2021-01-25 op The hostname, by default
75 f28d96d3 2021-01-25 op .Ar localhost .
76 f28d96d3 2021-01-25 op Certificates for the given
78 f28d96d3 2021-01-25 op are searched inside the
80 f28d96d3 2021-01-25 op directory given with the
83 714685c1 2021-01-30 op They have the form
84 f28d96d3 2021-01-25 op .Pa hostname.cert.pem
86 f28d96d3 2021-01-25 op .Pa hostname.key.pem .
87 1de92289 2021-04-15 op If a certificate or key don't exists for a given hostname they
88 714685c1 2021-01-30 op will be automatically generated.
90 fab952e1 2020-10-03 op Print the usage and exit.
91 721e2325 2020-11-18 op .It Fl p Ar port
92 eb699783 2021-01-18 op The port to listen on, by default 1965.
97 3abf91b0 2021-02-07 op options increase the verbosity.
98 f28d96d3 2021-01-25 op .It Fl x Pa path
99 eb699783 2021-01-18 op Enable execution of CGI scripts.
100 eb699783 2021-01-18 op See the description of the
102 eb699783 2021-01-18 op option in the section
104 eb699783 2021-01-18 op below to learn how
106 eb699783 2021-01-18 op is processed.
107 eb699783 2021-01-18 op Cannot be provided more than once.
109 f28d96d3 2021-01-25 op The root directory to serve.
110 f28d96d3 2021-01-25 op By default the current working directory is assumed.
112 eb699783 2021-01-18 op .Sh CONFIGURATION FILE
113 eb699783 2021-01-18 op The configuration file is divided into two sections:
114 eb699783 2021-01-18 op .Bl -tag -width xxxx
115 eb699783 2021-01-18 op .It Sy Global Options
116 eb699783 2021-01-18 op Global settings for
118 eb699783 2021-01-18 op .It Sy Servers
119 f28d96d3 2021-01-25 op Virtual hosts definition.
122 eb699783 2021-01-18 op Within the sections, empty lines are ignored and comments can be put
123 eb699783 2021-01-18 op anywhere in the file using a hash mark
125 eb699783 2021-01-18 op and extend to the end of the current line.
126 eb699783 2021-01-18 op A boolean is either the symbol
130 f28d96d3 2021-01-25 op A string is a sequence of characters wrapped in double quotes,
131 f28d96d3 2021-01-25 op .Dq like this .
132 eb699783 2021-01-18 op .Ss Global Options
133 eb699783 2021-01-18 op .Bl -tag -width 12m
134 ae08ec7d 2021-01-25 op .It Ic chroot Pa path
136 ae08ec7d 2021-01-25 op the process to the given
138 ae08ec7d 2021-01-25 op The daemon has to be run with root privileges and thus the option
140 714685c1 2021-01-30 op needs to be provided, so privileges can be dropped.
143 714685c1 2021-01-30 op will enter the chroot after loading the TLS keys, but before opening
144 714685c1 2021-01-30 op the virtual host root directories.
145 714685c1 2021-01-30 op It's recommended to keep the TLS keys outside the chroot.
146 ae08ec7d 2021-01-25 op Future version of
148 1de92289 2021-04-15 op may enforce this.
149 2b92a447 2021-02-06 op .It Ic ipv6 Ar bool
150 2b92a447 2021-02-06 op Enable or disable IPv6 support.
151 2b92a447 2021-02-06 op By default is off.
152 2b92a447 2021-02-06 op .It Ic mime Ar mime-type Ar file-extension
153 2b92a447 2021-02-06 op Add a mapping for the given
154 2b92a447 2021-02-06 op .Ar file-extension
156 2b92a447 2021-02-06 op .Ar mime-type .
157 2b92a447 2021-02-06 op Both argument are strings.
158 2b92a447 2021-02-06 op .It Ic port Ar portno
159 2b92a447 2021-02-06 op The port to listen on.
160 2b92a447 2021-02-06 op By default is 1965.
161 a709ddf5 2021-02-07 op .It Ic prefork Ar number
162 a709ddf5 2021-02-07 op Run the specified number of server processes.
163 a709ddf5 2021-02-07 op This increases the performance and prevents delays when connecting to
166 a709ddf5 2021-02-07 op runs 3 server processes by default, when not in config-less mode.
167 2c3e53da 2021-03-03 op The maximum number allowed is 16.
168 2b92a447 2021-02-06 op .It Ic protocols Ar string
169 2b92a447 2021-02-06 op Specify the TLS protocols to enable.
171 2b92a447 2021-02-06 op .Xr tls_config_parse_protocols 3
172 2b92a447 2021-02-06 op for the valid protocol string values.
173 2b92a447 2021-02-06 op By default, both TLSv1.3 and TLSv1.2 are enabled.
176 2b92a447 2021-02-06 op to enable only TLSv1.3.
177 ae08ec7d 2021-01-25 op .It Ic user Ar string
178 ae08ec7d 2021-01-25 op Run the daemon as the given user.
181 eb699783 2021-01-18 op Every virtual host is defined by a
184 eb699783 2021-01-18 op .Bl -tag -width Ds
185 eb699783 2021-01-18 op .It Ic server Ar hostname Brq ...
186 75fbb178 2021-01-28 op Match the server name using shell globbing rules.
187 75fbb178 2021-01-28 op This can be an explicit name,
188 de27389e 2021-01-21 op .Ar www.example.com ,
189 de27389e 2021-01-21 op or a name including a wildcards,
190 de27389e 2021-01-21 op .Ar *.example.com .
193 eb699783 2021-01-18 op Followed by a block of options that is enclosed in curly brackets:
194 eb699783 2021-01-18 op .Bl -tag -width Ds
195 cc8c2901 2021-04-29 op .It Ic alias Ar name
196 cc8c2901 2021-04-29 op Specify an additional alias
198 cc8c2901 2021-04-29 op for this server.
199 2b92a447 2021-02-06 op .It Ic auto Ic index Ar bool
200 2b92a447 2021-02-06 op If no index file is found, automatically generate a directory listing.
201 2b92a447 2021-02-06 op It's disabled by default.
202 2b92a447 2021-02-06 op .It Ic block Op Ic return Ar code Op Ar meta
203 2b92a447 2021-02-06 op Send a reply and close the connection;
209 2b92a447 2021-02-06 op .Dq temporary failure
213 2b92a447 2021-02-06 op is in the 3x range, then
215 2b92a447 2021-02-06 op must be provided.
218 2b92a447 2021-02-06 op the following special sequences are replaced:
219 2b92a447 2021-02-06 op .Bl -tag -compact
221 2b92a447 2021-02-06 op is replaced with a single
224 2b92a447 2021-02-06 op is replaced with the request path.
226 2b92a447 2021-02-06 op is replaced with the query string of the request.
228 2b92a447 2021-02-06 op is replaced with the server port.
230 2b92a447 2021-02-06 op is replaced with the server name.
232 eb699783 2021-01-18 op .It Ic cert Pa file
233 eb699783 2021-01-18 op Path to the certificate to use for this server.
236 eb699783 2021-01-18 op should contain a PEM encoded certificate.
237 eb699783 2021-01-18 op This option is mandatory.
238 eb699783 2021-01-18 op .It Ic cgi Pa path
239 87f2b68b 2021-02-02 op Execute CGI scripts that matches
241 87f2b68b 2021-02-02 op using shell globbing rules.
242 6119e13e 2021-01-19 op .It Ic default type Ar string
243 6119e13e 2021-01-19 op Set the default media type that is used if the media type for a
244 6119e13e 2021-01-19 op specified extension is not found.
245 6119e13e 2021-01-19 op If not specified, the
246 6119e13e 2021-01-19 op .Ic default type
248 6119e13e 2021-01-19 op .Dq application/octet-stream .
249 2b92a447 2021-02-06 op .It Ic entrypoint Pa path
250 dafaf467 2021-04-15 op Handle all the requests for the current virtual host using the
251 dafaf467 2021-04-15 op CGI script at
253 9cc630aa 2021-04-28 op .It Ic env Ar name Ar value
254 9cc630aa 2021-04-28 op Set the environment variable
258 9cc630aa 2021-04-28 op when executing CGI scripts.
259 9cc630aa 2021-04-28 op Can be provided more than once.
260 8ff40039 2021-05-24 op .\" don't document the "spawn <prog>" form because it probably won't
262 8ff40039 2021-05-24 op .It Ic fastcgi Oo Ic tcp Oc Pa socket Oo Ar port Oc
263 8ff40039 2021-05-24 op Enable FastCGI instead of serving files.
266 8ff40039 2021-05-24 op can either be a UNIX domain socket or a TCP socket.
267 8ff40039 2021-05-24 op If the FastCGI application is listening on a UNIX domain socket,
269 8ff40039 2021-05-24 op is a local path name within the
271 8ff40039 2021-05-24 op root directory of
273 8ff40039 2021-05-24 op Otherwise, the
275 8ff40039 2021-05-24 op keyword must be provided and
277 8ff40039 2021-05-24 op is interpreted as a hostname or an IP address.
279 8ff40039 2021-05-24 op can be either a port number or the name of a service enclosed in
280 8ff40039 2021-05-24 op double quotes.
281 8ff40039 2021-05-24 op If it's not specified defaults to 9000.
282 2b92a447 2021-02-06 op .It Ic index Ar string
283 2b92a447 2021-02-06 op Set the directory index file.
284 2b92a447 2021-02-06 op If not specified, it defaults to
285 2b92a447 2021-02-06 op .Pa index.gmi .
286 2b92a447 2021-02-06 op .It Ic key Pa file
287 2b92a447 2021-02-06 op Specify the private key to use for this server.
290 2b92a447 2021-02-06 op should contain a PEM encoded private key.
291 2b92a447 2021-02-06 op This option is mandatory.
292 05c23a54 2021-01-19 op .It Ic lang Ar string
293 05c23a54 2021-01-19 op Specify the language tag for the text/gemini content served.
294 05c23a54 2021-01-19 op If not specified, no
296 05c23a54 2021-01-19 op parameter will be added in the response.
297 c8b74339 2021-01-24 op .It Ic location Pa path Brq ...
298 c8b74339 2021-01-24 op Specify server configuration rules for a specific location.
301 c8b74339 2021-01-24 op argument will be matched against the request path with shell globbing
303 6016a593 2021-01-30 op In case of multiple location statements in the same context, the first
304 6016a593 2021-01-30 op matching location will be put into effect and the later ones ignored.
305 6016a593 2021-01-30 op Therefore is advisable to match for more specific paths first and for
306 6016a593 2021-01-30 op generic ones later on.
309 c8b74339 2021-01-24 op section may include most of the server configuration rules
311 fdea6aa0 2021-04-30 op .Ic alias , Ic cert , Ic env , Ic key , Ic location ,
312 e3ddf390 2021-02-06 op .Ic entrypoint No and Ic cgi .
313 2b92a447 2021-02-06 op .It Ic root Pa directory
314 2b92a447 2021-02-06 op Specify the root directory for this server.
315 2b92a447 2021-02-06 op It's relative to the chroot, if enabled.
316 02be96c6 2021-02-09 op .It Ic require Ic client Ic ca Pa path
317 02be96c6 2021-02-09 op Allow requests only from clients that provide a certificate signed by
318 02be96c6 2021-02-09 op the CA certificate in
320 02be96c6 2021-02-09 op It needs to be a PEM-encoded certificate and it's not relative to the
322 6abda252 2021-02-06 op .It Ic strip Ar number
325 0773413c 2021-05-15 op components from the beginning of the path before doing a lookup in the
326 0773413c 2021-05-15 op root directory.
327 0773413c 2021-05-15 op It's also considered for the
329 2b92a447 2021-02-06 op parameter in the scope of a
330 6abda252 2021-02-06 op .Ic block return .
333 87f2b68b 2021-02-02 op When a request for an executable file matches the
335 87f2b68b 2021-02-02 op rule, that file will be execute and its output fed to the client.
337 ee655e64 2021-02-01 op The CGI scripts are executed in the directory they reside and inherit
338 a7b9bb4d 2021-01-24 op the environment from
340 0ed56567 2020-11-06 op with these additional variables set:
341 ee655e64 2021-02-01 op .Bl -tag -width 24m
342 28ec6178 2021-01-24 op .It Ev GATEWAY_INTERFACE
344 ee655e64 2021-02-01 op .It Ev GEMINI_DOCUMENT_ROOT
345 ee655e64 2021-02-01 op The root directory of the virtual host.
346 ee655e64 2021-02-01 op .It Ev GEMINI_SCRIPT_FILENAME
347 ee655e64 2021-02-01 op Full path to the CGI script being executed.
348 ee655e64 2021-02-01 op .It Ev GEMINI_URL
349 ee655e64 2021-02-01 op The full IRI of the request.
350 ee655e64 2021-02-01 op .It Ev GEMINI_URL_PATH
351 ee655e64 2021-02-01 op The path of the request.
352 ee655e64 2021-02-01 op .It Ev PATH_INFO
353 ee655e64 2021-02-01 op The portion of the requested path that is derived from the the IRI
354 ee655e64 2021-02-01 op path hierarchy following the part that identifies the script itself.
355 ee655e64 2021-02-01 op Can be unset.
356 ee655e64 2021-02-01 op .It Ev PATH_TRANSLATED
357 ee655e64 2021-02-01 op Present if and only if
358 ee655e64 2021-02-01 op .Ev PATH_INFO
360 ee655e64 2021-02-01 op It represent the translation of the
361 ee655e64 2021-02-01 op .Ev PATH_INFO .
363 ee655e64 2021-02-01 op builds this by appending the
364 ee655e64 2021-02-01 op .Ev PATH_INFO
365 ee655e64 2021-02-01 op to the virtual host directory root.
366 ee655e64 2021-02-01 op .It Ev QUERY_STRING
367 ee655e64 2021-02-01 op The decoded query string.
368 ee655e64 2021-02-01 op .It Ev REMOTE_ADDR , Ev REMOTE_HOST
369 ee655e64 2021-02-01 op Textual representation of the client IP.
370 ee655e64 2021-02-01 op .It Ev REQUEST_METHOD
371 ee655e64 2021-02-01 op This is present only for RFC3875 (CGI) compliance.
372 ee655e64 2021-02-01 op It's always set to the empty string.
373 ee655e64 2021-02-01 op .It Ev SCRIPT_NAME
374 ee655e64 2021-02-01 op The part of the
375 ee655e64 2021-02-01 op .Ev GEMINI_URL_PATH
376 ee655e64 2021-02-01 op that identifies the current CGI script.
377 ee655e64 2021-02-01 op .It Ev SERVER_NAME
378 ee655e64 2021-02-01 op The name of the server
379 ee655e64 2021-02-01 op .It Ev SERVER_PORT
380 ee655e64 2021-02-01 op The port the server is listening on.
381 28ec6178 2021-01-24 op .It Ev SERVER_PROTOCOL
383 0ed56567 2020-11-06 op .It Ev SERVER_SOFTWARE
384 ee655e64 2021-02-01 op The name and version of the server, i.e.
386 677afbd3 2020-12-02 op .It Ev AUTH_TYPE
387 28ec6178 2021-01-24 op The string "Certificate" if the client used a certificate, otherwise
389 677afbd3 2020-12-02 op .It Ev REMOTE_USER
390 677afbd3 2020-12-02 op The subject of the client certificate if provided, otherwise unset.
391 677afbd3 2020-12-02 op .It Ev TLS_CLIENT_ISSUER
392 28ec6178 2021-01-24 op The is the issuer of the client certificate if provided, otherwise
394 677afbd3 2020-12-02 op .It Ev TLS_CLIENT_HASH
395 677afbd3 2020-12-02 op The hash of the client certificate if provided, otherwise unset.
396 ee655e64 2021-02-01 op The format is
397 ee655e64 2021-02-01 op .Dq ALGO:HASH .
398 89541eee 2021-04-13 op .It Ev TLS_VERSION
399 89541eee 2021-04-13 op The TLS version negotiated with the peer.
400 89541eee 2021-04-13 op .It Ev TLS_CIPHER
401 89541eee 2021-04-13 op The cipher suite negotiated with the peer.
402 89541eee 2021-04-13 op .It Ev TLS_CIPHER_STRENGTH
403 89541eee 2021-04-13 op The strength in bits for the symmetric cipher that is being used with
405 b63e30ff 2021-02-07 op .It Ev TLS_CLIENT_NOT_AFTER
406 b63e30ff 2021-02-07 op The time corresponding to the end of the validity period of the peer
407 b63e30ff 2021-02-07 op certificate in the ISO 8601 format
408 b63e30ff 2021-02-07 op .Pq e.g. Dq 2021-02-07T20:17:41Z .
409 b63e30ff 2021-02-07 op .It Ev TLS_CLIENT_NOT_BEFORE
410 b63e30ff 2021-02-07 op The time corresponding to the start of the validity period of the peer
411 b63e30ff 2021-02-07 op certificate in the ISO 8601 format.
415 75fbb178 2021-01-28 op To auto-detect the MIME type of the response
417 75fbb178 2021-01-28 op looks at the file extension and consults its internal table.
418 75fbb178 2021-01-28 op By default the following mappings are loaded, but they can be
419 75fbb178 2021-01-28 op overridden or extended using the
421 75fbb178 2021-01-28 op configuration option.
422 75fbb178 2021-01-28 op If no MIME is found, the value of
423 75fbb178 2021-01-28 op .Ic default type
424 75fbb178 2021-01-28 op matching the file
426 75fbb178 2021-01-28 op will be used, which is
427 75fbb178 2021-01-28 op .Dq application/octet-stream
430 75fbb178 2021-01-28 op .Bl -tag -offset indent -width 14m -compact
433 75fbb178 2021-01-28 op .It gemini, gmi
441 75fbb178 2021-01-28 op .It markdown, md
442 75fbb178 2021-01-28 op text/markdown
446 75fbb178 2021-01-28 op application/pdf
450 75fbb178 2021-01-28 op image/svg+xml
457 f28d96d3 2021-01-25 op Serve the current directory
458 6980aad6 2020-10-02 op .Bd -literal -offset indent
462 f28d96d3 2021-01-25 op To serve the directory
464 f28d96d3 2021-01-25 op and enable CGI scripts inside
465 f28d96d3 2021-01-25 op .Pa docs/cgi ,
467 0ed56567 2020-11-06 op .Bd -literal -offset indent
468 f28d96d3 2021-01-25 op $ mkdir docs/cgi
469 b7a99061 2021-04-15 op $ cat <<EOF > docs/cgi/hello
471 0ed56567 2020-11-06 op printf "20 text/plain\\r\\n"
472 f28d96d3 2021-01-25 op echo "hello world"
474 f28d96d3 2021-01-25 op $ chmod +x docs/cgi/hello
475 b890467e 2021-03-20 op $ gmid -x '/cgi/*' docs
478 eb699783 2021-01-18 op The following is an example of a possible configuration for a site
479 eb699783 2021-01-18 op that enables only TLSv1.3, adds a mime type for the file extension
480 eb699783 2021-01-18 op "rtf" and defines two virtual host:
481 eb699783 2021-01-18 op .Bd -literal -offset indent
482 eb699783 2021-01-18 op ipv6 on # enable ipv6
484 eb699783 2021-01-18 op protocols "tlsv1.3"
486 eb699783 2021-01-18 op mime "application/rtf" "rtf"
488 eb699783 2021-01-18 op server "example.com" {
489 eb699783 2021-01-18 op cert "/path/to/cert.pem"
490 eb699783 2021-01-18 op key "/path/to/key.pem"
491 eb699783 2021-01-18 op root "/var/gemini/example.com"
494 eb699783 2021-01-18 op server "it.example.com" {
495 eb699783 2021-01-18 op cert "/path/to/cert.pem"
496 eb699783 2021-01-18 op key "/path/to/key.pem"
497 eb699783 2021-01-18 op root "/var/gemini/it.example.com"
498 87f2b68b 2021-02-02 op cgi "/cgi-bin/*"
503 f28d96d3 2021-01-25 op Yet another example, showing how to enable a
508 f28d96d3 2021-01-25 op .Bd -literal -offset indent
509 f28d96d3 2021-01-25 op chroot "/var/gemini"
512 f28d96d3 2021-01-25 op server "example.com" {
513 f28d96d3 2021-01-25 op cert "/path/to/cert.pem"
514 f28d96d3 2021-01-25 op key "/path/to/key.pem"
515 714685c1 2021-01-30 op root "/example.com" # in the /var/gemini chroot
517 4ee08bd1 2021-02-03 op location "/static/*" {
518 f28d96d3 2021-01-25 op auto index on
519 f28d96d3 2021-01-25 op index "index.gemini"
523 ef04b551 2021-01-09 op .Sh ACKNOWLEDGEMENTS
526 eb699783 2021-01-18 op .Dq Flexible and Economical
527 eb699783 2021-01-18 op UTF-8 decoder written by
528 f28d96d3 2021-01-25 op .An Bjoern Hoehrmann .
533 714685c1 2021-01-30 op program was written by
534 714685c1 2021-01-30 op .An Omar Polo Aq Mt op@omarpolo.com .
538 eb699783 2021-01-18 op The root directories of all virtual hosts are opened during the daemon
539 eb699783 2021-01-18 op startup; this means that if a root directory gets deleted and then
542 eb699783 2021-01-18 op won't be able to serve files inside that directory until a restart.
543 eb699783 2021-01-18 op This restriction applies only to the root directories and not their content.
545 714685c1 2021-01-30 op a %2F sequence is indistinguishable from a literal slash: this is not
546 714685c1 2021-01-30 op RFC3986-compliant.
548 714685c1 2021-01-30 op a %00 sequence is treated as invalid character and thus rejected.
