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
|
//! A LAN file server for sharing files on a local network.
// Copyright (c) 2026 Doan Luu Duc Tai
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// SPDX-License-Identifier: MIT OR Apache-2.0
use axum::response::IntoResponse;
use clap::Parser;
use futures_util::StreamExt;
use std::fmt::Write as _;
use std::io::{self, Write};
#[derive(Parser, Debug)]
#[command(name = "fileshare", about = "LAN File Server")]
struct Args {
#[arg(long, help = "Server mode (upload or simple)")]
mode: Option<String>,
#[arg(long, help = "Port number (auto if not set)")]
port: Option<u16>,
#[arg(long, help = "Directory to expose")]
dir: std::path::PathBuf,
}
#[derive(Clone, Debug)]
struct AppState {
dir: std::path::PathBuf,
}
fn get_free_port() -> u16 {
std::net::TcpListener::bind("0.0.0.0:0")
.and_then(|listener| listener.local_addr())
.map_or(8080, |addr| addr.port())
}
fn get_local_ip() -> String {
local_ip_address::local_ip()
.map_or_else(|_| "127.0.0.1".to_string(), |ip| ip.to_string())
}
fn safe_filename(name: &str) -> String {
let path = std::path::Path::new(name);
let filename = path.file_name().and_then(|s| s.to_str()).unwrap_or("file");
let now = std::time::SystemTime::now()
.duration_since(std::time::UNIX_EPOCH)
.map_or(0, |d| d.as_secs());
format!("{now}_{filename}")
}
fn get_safe_path(uri_path: &str, root_dir: &std::path::Path) -> Option<std::path::PathBuf> {
let decoded = percent_encoding::percent_decode_str(uri_path)
.decode_utf8()
.ok()?;
let canonical_root = root_dir.canonicalize().ok()?;
let mut safe_path = canonical_root.clone();
for segment in decoded.split('/') {
if segment.is_empty() || segment == "." {
continue;
}
if segment == ".." {
safe_path.pop();
} else {
safe_path.push(segment);
}
}
if safe_path.exists() {
safe_path = safe_path.canonicalize().ok()?;
}
if safe_path.starts_with(&canonical_root) {
Some(safe_path)
} else {
None
}
}
fn render_directory_index(dir_path: &std::path::Path, request_path: &str) -> io::Result<String> {
let mut html = String::new();
html.push_str("<!DOCTYPE html><html><head><meta charset=\"utf-8\"><title>Directory listing</title></head><body>");
let _ = write!(
html,
"<h1>Directory listing for {request_path}</h1><hr><ul>"
);
if request_path != "/" {
html.push_str("<li><a href=\"..\">..</a></li>");
}
let mut entries = Vec::new();
for entry_res in std::fs::read_dir(dir_path)? {
let entry = entry_res?;
let name = entry.file_name().to_string_lossy().to_string();
let metadata = entry.metadata()?;
let is_dir = metadata.is_dir();
entries.push((name, is_dir));
}
entries.sort_by(|a, b| {
if a.1 == b.1 {
a.0.to_lowercase().cmp(&b.0.to_lowercase())
} else if a.1 {
std::cmp::Ordering::Less
} else {
std::cmp::Ordering::Greater
}
});
for (name, is_dir) in entries {
let display_name = if is_dir {
format!("{name}/")
} else {
name.clone()
};
let href = if is_dir { format!("{name}/") } else { name };
let _ = write!(html, "<li><a href=\"{href}\">{display_name}</a></li>");
}
html.push_str("</ul><hr></body></html>");
Ok(html)
}
async fn handle_get(
axum::extract::State(state): axum::extract::State<AppState>,
uri: axum::http::Uri,
) -> axum::response::Response {
let path_str = uri.path();
let Some(safe_path) = get_safe_path(path_str, &state.dir) else {
return (axum::http::StatusCode::FORBIDDEN, "Forbidden").into_response();
};
if !safe_path.exists() {
return (axum::http::StatusCode::NOT_FOUND, "Not Found").into_response();
}
if safe_path.is_dir() {
if !path_str.ends_with('/') {
let redirect_path = format!("{path_str}/");
return axum::response::Response::builder()
.status(axum::http::StatusCode::MOVED_PERMANENTLY)
.header("location", redirect_path)
.body(axum::body::Body::empty())
.unwrap_or_else(|_| {
(
axum::http::StatusCode::INTERNAL_SERVER_ERROR,
"Internal Server Error",
)
.into_response()
});
}
render_directory_index(&safe_path, path_str).map_or_else(
|_| {
(
axum::http::StatusCode::INTERNAL_SERVER_ERROR,
"Internal Server Error",
)
.into_response()
},
|html| axum::response::Html(html).into_response(),
)
} else {
tokio::fs::File::open(&safe_path).await.map_or_else(
|_| {
(
axum::http::StatusCode::INTERNAL_SERVER_ERROR,
"Internal Server Error",
)
.into_response()
},
|file| {
let stream =
tokio_util::codec::FramedRead::new(file, tokio_util::codec::BytesCodec::new())
.map(|r| r.map(tokio_util::bytes::BytesMut::freeze));
let body = axum::body::Body::from_stream(stream);
let mime = mime_guess::from_path(&safe_path).first_or_octet_stream();
axum::response::Response::builder()
.header("content-type", mime.as_ref())
.body(body)
.unwrap_or_else(|_| {
(
axum::http::StatusCode::INTERNAL_SERVER_ERROR,
"Internal Server Error",
)
.into_response()
})
},
)
}
}
async fn upload_form() -> axum::response::Html<&'static str> {
axum::response::Html(
r#"
<!DOCTYPE html>
<html>
<body>
<h1>Upload File</h1>
<form action="/" method="POST" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" value="Upload">
</form>
</body>
</html>
"#,
)
}
async fn upload_file(
axum::extract::State(state): axum::extract::State<AppState>,
mut multipart: axum::extract::Multipart,
) -> axum::response::Response {
let mut uploaded = false;
while let Some(field) = match multipart.next_field().await {
Ok(Some(f)) => Some(f),
Ok(None) => None,
Err(err) => {
return (
axum::http::StatusCode::BAD_REQUEST,
format!("Multipart error: {err}"),
)
.into_response();
}
} {
let filename = match field.file_name() {
Some(name) if !name.is_empty() => name.to_string(),
_ => continue,
};
let data = match field.bytes().await {
Ok(bytes) => bytes,
Err(err) => {
return (
axum::http::StatusCode::INTERNAL_SERVER_ERROR,
format!("Failed to read data: {err}"),
)
.into_response();
}
};
let safe_name = safe_filename(&filename);
let filepath = state.dir.join(safe_name);
if let Err(err) = tokio::fs::write(&filepath, data).await {
return (
axum::http::StatusCode::INTERNAL_SERVER_ERROR,
format!("Failed to write file: {err}"),
)
.into_response();
}
uploaded = true;
break;
}
if uploaded {
(axum::http::StatusCode::OK, "File uploaded successfully.").into_response()
} else {
(axum::http::StatusCode::BAD_REQUEST, "Upload failed.").into_response()
}
}
fn print_server_info(port: u16, target_dir: &std::path::Path) {
let local_ip = get_local_ip();
println!("\nServing at:");
println!(" Local: http://127.0.0.1:{port}");
println!(" Network: http://{local_ip}:{port}");
println!(" Directory: {}", target_dir.display());
}
#[tokio::main]
async fn main() {
let args = Args::parse();
let port = args.port.unwrap_or_else(get_free_port);
let target_dir = match args.dir.canonicalize() {
Ok(path) => {
if !path.is_dir() {
eprintln!("[-] Error: '{}' is not a directory.", args.dir.display());
std::process::exit(1);
}
path
}
Err(e) => {
eprintln!(
"[-] Error: Directory '{}' does not exist or is not accessible: {}",
args.dir.display(),
e
);
std::process::exit(1);
}
};
let mode = match args.mode.as_deref() {
Some("upload") => "upload".to_string(),
Some("simple") => "simple".to_string(),
Some(other) => {
eprintln!("Invalid mode '{other}'. Use 'upload' or 'simple'.");
std::process::exit(1);
}
None => {
println!("\nChoose server mode:");
println!("1) Upload server");
println!("2) Simple HTTP server");
print!("\nEnter choice (1 or 2): ");
if io::stdout().flush().is_err() {
eprintln!("[-] Error: Failed to flush stdout");
std::process::exit(1);
}
let mut choice = String::new();
if io::stdin().read_line(&mut choice).is_err() {
eprintln!("[-] Error: Failed to read line");
std::process::exit(1);
}
match choice.trim() {
"1" => "upload".to_string(),
"2" => "simple".to_string(),
_ => {
eprintln!("Invalid choice.");
std::process::exit(1);
}
}
}
};
let state = AppState {
dir: target_dir.clone(),
};
let app = if mode == "upload" {
axum::Router::new()
.route("/", axum::routing::get(upload_form).post(upload_file))
.fallback(handle_get)
.with_state(state)
} else {
axum::Router::new().fallback(handle_get).with_state(state)
};
println!(
"\n[+] {} started",
if mode == "upload" {
"Upload server"
} else {
"Simple HTTP server"
}
);
print_server_info(port, &target_dir);
let listener = match tokio::net::TcpListener::bind(format!("0.0.0.0:{port}")).await {
Ok(l) => l,
Err(e) => {
eprintln!("[-] Error: Failed to bind to port {port}: {e}");
std::process::exit(1);
}
};
if let Err(e) = axum::serve(listener, app).await {
eprintln!("[-] Server error: {e}");
}
}
|
