1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
// SPDX-License-Identifier: MIT OR Apache-2.0
// This file is part of Static Web Server.
// See https://static-web-server.net/ for more information
// Copyright (C) 2019-present Jose Quintana <joseluisq.net>
//! The static file module which powers the web server.
//!
// Part of the file is borrowed and adapted at a convenience from
// https://github.com/seanmonstar/warp/blob/master/src/filters/fs.rs
use headers::{AcceptRanges, HeaderMap, HeaderMapExt, HeaderValue};
use hyper::{header::CONTENT_ENCODING, header::CONTENT_LENGTH, Body, Method, Response, StatusCode};
use std::fs::{File, Metadata};
use std::io;
use std::path::PathBuf;
use crate::conditional_headers::ConditionalHeaders;
use crate::fs::meta::{try_metadata, try_metadata_with_html_suffix, FileMetadata};
use crate::fs::path::{sanitize_path, PathExt};
use crate::http_ext::{MethodExt, HTTP_SUPPORTED_METHODS};
use crate::response::response_body;
use crate::Result;
#[cfg(feature = "experimental")]
use crate::mem_cache::{cache, cache::MemCacheOpts};
#[cfg(any(
feature = "compression",
feature = "compression-deflate",
feature = "compression-gzip",
feature = "compression-brotli",
feature = "compression-zstd"
))]
use crate::compression_static;
#[cfg(feature = "directory-listing")]
use crate::{
directory_listing,
directory_listing::{DirListFmt, DirListOpts},
};
#[cfg(feature = "directory-listing-download")]
use crate::directory_listing_download::{
archive_reply, DirDownloadFmt, DirDownloadOpts, DOWNLOAD_PARAM_KEY,
};
const DEFAULT_INDEX_FILES: &[&str; 1] = &["index.html"];
/// Defines all options needed by the static-files handler.
pub struct HandleOpts<'a> {
/// Request method.
pub method: &'a Method,
/// In-memory files cache feature (experimental).
#[cfg(feature = "experimental")]
pub memory_cache: Option<&'a MemCacheOpts>,
/// Request headers.
pub headers: &'a HeaderMap<HeaderValue>,
/// Request base path.
pub base_path: &'a PathBuf,
/// Request base path.
pub uri_path: &'a str,
/// Index files.
pub index_files: &'a [&'a str],
/// Request URI query.
pub uri_query: Option<&'a str>,
/// Directory listing feature.
#[cfg(feature = "directory-listing")]
#[cfg_attr(docsrs, doc(cfg(feature = "directory-listing")))]
pub dir_listing: bool,
/// Directory listing order feature.
#[cfg(feature = "directory-listing")]
#[cfg_attr(docsrs, doc(cfg(feature = "directory-listing")))]
pub dir_listing_order: u8,
/// Directory listing format feature.
#[cfg(feature = "directory-listing")]
#[cfg_attr(docsrs, doc(cfg(feature = "directory-listing")))]
pub dir_listing_format: &'a DirListFmt,
/// Directory listing download feature.
#[cfg(feature = "directory-listing-download")]
#[cfg_attr(docsrs, doc(cfg(feature = "directory-listing-download")))]
pub dir_listing_download: &'a [DirDownloadFmt],
/// Redirect trailing slash feature.
pub redirect_trailing_slash: bool,
/// Compression static feature.
pub compression_static: bool,
/// Ignore hidden files feature.
pub ignore_hidden_files: bool,
/// Prevent following symlinks for files and directories.
pub disable_symlinks: bool,
}
/// Static file response type with additional data.
pub struct StaticFileResponse {
/// Inner HTTP response.
pub resp: Response<Body>,
/// The file path of the inner HTTP response.
pub file_path: PathBuf,
}
/// The server entry point to handle incoming requests which map to specific files
/// on file system and return a file response.
pub async fn handle(opts: &HandleOpts<'_>) -> Result<StaticFileResponse, StatusCode> {
let method = opts.method;
let uri_path = opts.uri_path;
// Check if current HTTP method for incoming request is supported
if !method.is_allowed() {
return Err(StatusCode::METHOD_NOT_ALLOWED);
}
let headers_opt = opts.headers;
let mut file_path = sanitize_path(opts.base_path, uri_path)?;
// In-memory file cache feature with eviction policy
#[cfg(feature = "experimental")]
if opts.memory_cache.is_some() {
// NOTE: we only support a default auto index for directory requests
// when working on a memory-cache context.
if opts.redirect_trailing_slash && uri_path.ends_with('/') {
file_path.push("index.html");
}
if let Some(result) = cache::get_or_acquire(file_path.as_path(), headers_opt).await {
return Ok(StaticFileResponse {
resp: result?,
// file_path: resp_file_path,
file_path,
});
}
}
let FileMetadata {
file_path,
metadata,
is_dir,
precompressed_variant,
} = get_composed_file_metadata(
&mut file_path,
headers_opt,
opts.compression_static,
opts.index_files,
opts.disable_symlinks,
)?;
// Check for a hidden file/directory (dotfile) and ignore it if feature enabled
if opts.ignore_hidden_files && file_path.is_hidden() {
return Err(StatusCode::NOT_FOUND);
}
let resp_file_path = file_path.to_owned();
// Check for a trailing slash on the current directory path
// and redirect if that path doesn't end with the slash char
if is_dir && opts.redirect_trailing_slash && !uri_path.ends_with('/') {
let query = opts.uri_query.map_or(String::new(), |s| ["?", s].concat());
let uri = [uri_path, "/", query.as_str()].concat();
let loc = match HeaderValue::from_str(uri.as_str()) {
Ok(val) => val,
Err(err) => {
tracing::error!("invalid header value from current uri: {:?}", err);
return Err(StatusCode::INTERNAL_SERVER_ERROR);
}
};
let mut resp = Response::new(Body::empty());
resp.headers_mut().insert(hyper::header::LOCATION, loc);
*resp.status_mut() = StatusCode::PERMANENT_REDIRECT;
tracing::trace!("uri doesn't end with a slash so redirecting permanently");
return Ok(StaticFileResponse {
resp,
file_path: resp_file_path,
});
}
// Respond with the permitted communication methods
if method.is_options() {
let mut resp = Response::new(Body::empty());
*resp.status_mut() = StatusCode::NO_CONTENT;
resp.headers_mut()
.typed_insert(headers::Allow::from_iter(HTTP_SUPPORTED_METHODS.clone()));
resp.headers_mut().typed_insert(AcceptRanges::bytes());
return Ok(StaticFileResponse {
resp,
file_path: resp_file_path,
});
}
// Directory listing
// Check if "directory listing" feature is enabled,
// if current path is a valid directory and
// if it does not contain an `index.html` file (if a proper auto index is generated)
#[cfg(feature = "directory-listing")]
if is_dir && opts.dir_listing && !file_path.exists() {
// Directory listing download
// Check if "directory listing download" feature is enabled,
// if current path is a valid directory and
// if query string has parameter "download" set
#[cfg(feature = "directory-listing-download")]
if !opts.dir_listing_download.is_empty() {
if let Some((_k, _dl_archive_opt)) =
form_urlencoded::parse(opts.uri_query.unwrap_or("").as_bytes())
.find(|(k, _v)| k == DOWNLOAD_PARAM_KEY)
{
// file path is index.html, need pop
let mut fp = file_path.clone();
fp.pop();
if let Some(filename) = fp.file_name() {
let resp = archive_reply(
filename,
&fp,
DirDownloadOpts {
method,
disable_symlinks: opts.disable_symlinks,
ignore_hidden_files: opts.ignore_hidden_files,
},
);
return Ok(StaticFileResponse {
resp,
file_path: resp_file_path,
});
} else {
tracing::error!("Unable to get filename from {}", fp.to_string_lossy());
return Err(StatusCode::INTERNAL_SERVER_ERROR);
}
}
}
let resp = directory_listing::auto_index(DirListOpts {
method,
current_path: uri_path,
uri_query: opts.uri_query,
filepath: file_path,
dir_listing_order: opts.dir_listing_order,
dir_listing_format: opts.dir_listing_format,
ignore_hidden_files: opts.ignore_hidden_files,
disable_symlinks: opts.disable_symlinks,
#[cfg(feature = "directory-listing-download")]
dir_listing_download: opts.dir_listing_download,
})?;
return Ok(StaticFileResponse {
resp,
file_path: resp_file_path,
});
}
// Check for a pre-compressed file variant if present under the `opts.compression_static` context
if let Some(precompressed_meta) = precompressed_variant {
let (precomp_path, precomp_encoding) = precompressed_meta;
let mut resp = file_reply(
headers_opt,
file_path,
&metadata,
Some(precomp_path),
#[cfg(feature = "experimental")]
opts.memory_cache,
)?;
// Prepare corresponding headers to let know how to decode the payload
resp.headers_mut().remove(CONTENT_LENGTH);
let encoding = match HeaderValue::from_str(precomp_encoding.as_str()) {
Ok(val) => val,
Err(err) => {
tracing::error!(
"unable to parse header value from content encoding: {:?}",
err
);
return Err(StatusCode::INTERNAL_SERVER_ERROR);
}
};
resp.headers_mut().insert(CONTENT_ENCODING, encoding);
return Ok(StaticFileResponse {
resp,
file_path: resp_file_path,
});
}
#[cfg(feature = "experimental")]
let resp = file_reply(headers_opt, file_path, &metadata, None, opts.memory_cache)?;
#[cfg(not(feature = "experimental"))]
let resp = file_reply(headers_opt, file_path, &metadata, None)?;
Ok(StaticFileResponse {
resp,
file_path: resp_file_path,
})
}
/// Returns the final composed metadata containing
/// the current `file_path` with its file metadata
/// as well as its optional pre-compressed variant.
fn get_composed_file_metadata<'a>(
mut file_path: &'a mut PathBuf,
_headers: &'a HeaderMap<HeaderValue>,
_compression_static: bool,
mut index_files: &'a [&'a str],
disable_symlinks: bool,
) -> Result<FileMetadata<'a>, StatusCode> {
tracing::trace!("getting metadata for file {}", file_path.display());
// Prevent symlinks access if option is enabled
if disable_symlinks && file_path.is_symlink() {
tracing::warn!(
"file path {} is a symlink, access denied",
file_path.display()
);
return Err(StatusCode::FORBIDDEN);
}
// Try to find the file path on the file system
match try_metadata(file_path) {
Ok((mut metadata, is_dir)) => {
if is_dir {
// Try every index file variant in order
if index_files.is_empty() {
index_files = DEFAULT_INDEX_FILES;
}
let mut index_found = false;
for index in index_files {
// Append a HTML index page by default if it's a directory path (`autoindex`)
tracing::debug!("dir: appending {} to the directory path", index);
file_path.push(index);
// Pre-compressed variant check for the autoindex
#[cfg(any(
feature = "compression",
feature = "compression-deflate",
feature = "compression-gzip",
feature = "compression-brotli",
feature = "compression-zstd"
))]
if _compression_static {
if let Some(p) =
compression_static::precompressed_variant(file_path, _headers)
{
return Ok(FileMetadata {
file_path,
metadata: p.metadata,
is_dir: false,
precompressed_variant: Some((p.file_path, p.encoding)),
});
}
}
// Otherwise, just fallback to finding the index.html
// and overwrite the current `meta`
// Also noting that it's still a directory request
if let Ok(meta_res) = try_metadata(file_path) {
(metadata, _) = meta_res;
index_found = true;
break;
}
// We remove only the appended index file
file_path.pop();
let new_meta: Option<Metadata>;
(file_path, new_meta) = try_metadata_with_html_suffix(file_path);
if let Some(new_meta) = new_meta {
metadata = new_meta;
index_found = true;
break;
}
}
// In case no index was found then we append the last index
// of the list to preserve the previous behavior
if !index_found && !index_files.is_empty() {
file_path.push(index_files.last().unwrap());
}
} else {
// Fallback pre-compressed variant check for the specific file
#[cfg(any(
feature = "compression",
feature = "compression-deflate",
feature = "compression-gzip",
feature = "compression-brotli",
feature = "compression-zstd"
))]
if _compression_static {
if let Some(p) = compression_static::precompressed_variant(file_path, _headers)
{
return Ok(FileMetadata {
file_path,
metadata: p.metadata,
is_dir: false,
precompressed_variant: Some((p.file_path, p.encoding)),
});
}
}
}
Ok(FileMetadata {
file_path,
metadata,
is_dir,
precompressed_variant: None,
})
}
Err(err) => {
// Pre-compressed variant check for the file not found
#[cfg(any(
feature = "compression",
feature = "compression-deflate",
feature = "compression-gzip",
feature = "compression-brotli",
feature = "compression-zstd"
))]
if _compression_static {
if let Some(p) = compression_static::precompressed_variant(file_path, _headers) {
return Ok(FileMetadata {
file_path,
metadata: p.metadata,
is_dir: false,
precompressed_variant: Some((p.file_path, p.encoding)),
});
}
}
// Otherwise, if the file path doesn't exist then
// we try to find the path suffixed with `.html`.
// For example: `/posts/article` will fallback to `/posts/article.html`
let new_meta: Option<Metadata>;
(file_path, new_meta) = try_metadata_with_html_suffix(file_path);
#[cfg(any(
feature = "compression",
feature = "compression-deflate",
feature = "compression-gzip",
feature = "compression-brotli",
feature = "compression-zstd"
))]
match new_meta {
Some(new_meta) => {
return Ok(FileMetadata {
file_path,
metadata: new_meta,
is_dir: false,
precompressed_variant: None,
})
}
_ => {
// Last pre-compressed variant check or the suffixed file not found
if _compression_static {
if let Some(p) =
compression_static::precompressed_variant(file_path, _headers)
{
return Ok(FileMetadata {
file_path,
metadata: p.metadata,
is_dir: false,
precompressed_variant: Some((p.file_path, p.encoding)),
});
}
}
}
}
#[cfg(not(feature = "compression"))]
if let Some(new_meta) = new_meta {
return Ok(FileMetadata {
file_path,
metadata: new_meta,
is_dir: false,
precompressed_variant: None,
});
}
Err(err)
}
}
}
/// Reply with the corresponding file content taking into account
/// its precompressed variant if any.
/// The `path` param should contains always the original requested file path and
/// the `meta` param value should corresponds to it.
/// However, if `path_precompressed` contains some value then
/// the `meta` param value will belong to the `path_precompressed` (precompressed file variant).
fn file_reply<'a>(
headers: &'a HeaderMap<HeaderValue>,
path: &'a PathBuf,
meta: &'a Metadata,
path_precompressed: Option<PathBuf>,
#[cfg(feature = "experimental")] memory_cache: Option<&'a MemCacheOpts>,
) -> Result<Response<Body>, StatusCode> {
let conditionals = ConditionalHeaders::new(headers);
let file_path = path_precompressed.as_ref().unwrap_or(path);
match File::open(file_path) {
Ok(file) => {
#[cfg(feature = "experimental")]
let resp = response_body(file, path, meta, conditionals, memory_cache);
#[cfg(not(feature = "experimental"))]
let resp = response_body(file, path, meta, conditionals);
resp
}
Err(err) => {
let status = match err.kind() {
io::ErrorKind::NotFound => {
tracing::debug!("file can't be opened or not found: {:?}", path.display());
StatusCode::NOT_FOUND
}
io::ErrorKind::PermissionDenied => {
tracing::warn!("file permission denied: {:?}", path.display());
StatusCode::FORBIDDEN
}
_ => {
tracing::error!("file open error (path={:?}): {} ", path.display(), err);
StatusCode::INTERNAL_SERVER_ERROR
}
};
Err(status)
}
}
}