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

use crate::{
    fs_shims::{fs, File},
    options::StaticOptions,
    StaticConnExt,
};
use std::path::{Path, PathBuf};
use trillium::{async_trait, conn_unwrap, Conn, Handler};

/**
trillium handler to serve static files from the filesystem
*/
#[derive(Debug)]
pub struct StaticFileHandler {
    fs_root: PathBuf,
    index_file: Option<String>,
    root_is_file: bool,
    options: StaticOptions,
}

#[derive(Debug)]
enum Record {
    File(PathBuf, File),
    Dir(PathBuf),
}

impl StaticFileHandler {
    async fn resolve_fs_path(&self, url_path: &str) -> Option<PathBuf> {
        let mut file_path = self.fs_root.clone();
        log::trace!(
            "attempting to resolve {} relative to {}",
            url_path,
            file_path.to_str().unwrap()
        );
        for segment in Path::new(url_path) {
            match segment.to_str() {
                Some("/") => {}
                Some(".") => {}
                Some("..") => {
                    file_path.pop();
                }
                _ => {
                    file_path.push(segment);
                }
            };
        }

        if file_path.starts_with(&self.fs_root) {
            fs::canonicalize(file_path).await.ok().map(Into::into)
        } else {
            None
        }
    }

    async fn resolve(&self, url_path: &str) -> Option<Record> {
        let fs_path = self.resolve_fs_path(url_path).await?;
        let metadata = fs::metadata(&fs_path).await.ok()?;
        if metadata.is_dir() {
            log::trace!("resolved {} as dir {}", url_path, fs_path.to_str().unwrap());
            Some(Record::Dir(fs_path))
        } else if metadata.is_file() {
            File::open(&fs_path)
                .await
                .ok()
                .map(|file| Record::File(fs_path, file))
        } else {
            None
        }
    }

    /**
    builds a new StaticFileHandler

    If the fs_root is a file instead of a directory, that file will be served at all paths.

    ```
    # #[cfg(not(unix))] fn main() {}
    # #[cfg(unix)] fn main() {
    use trillium_static::{StaticFileHandler, crate_relative_path};
    let mut handler = StaticFileHandler::new(crate_relative_path!("examples/files"));

    use trillium_testing::prelude::*;
    init(&mut handler);

    assert_not_handled!(get("/").on(&handler)); // no index file configured

    assert_ok!(
        get("/index.html").on(&handler),
        "<h1>hello world</h1>",
        "content-type" => "text/html; charset=utf-8"
    );
    # }
    ```
    */
    pub fn new(fs_root: impl AsRef<Path>) -> Self {
        let fs_root = fs_root.as_ref().canonicalize().unwrap();
        Self {
            fs_root,
            index_file: None,
            root_is_file: false,
            options: StaticOptions::default(),
        }
    }

    /// do not set an etag header
    pub fn without_etag_header(mut self) -> Self {
        self.options.etag = false;
        self
    }

    /// do not set last-modified header
    pub fn without_modified_header(mut self) -> Self {
        self.options.modified = false;
        self
    }

    /**
    sets the index file on this StaticFileHandler
    ```
    # #[cfg(not(unix))] fn main() {}
    # #[cfg(unix)] fn main() {

    use trillium_static::{StaticFileHandler, crate_relative_path};

    let handler = StaticFileHandler::new(crate_relative_path!("examples/files"))
        .with_index_file("index.html");

    use trillium_testing::prelude::*;
    assert_ok!(get("/").on(&handler), "<h1>hello world</h1>", "content-type" => "text/html; charset=utf-8");
    # }
    ```
    */
    pub fn with_index_file(mut self, file: &str) -> Self {
        self.index_file = Some(file.to_string());
        self
    }
}

#[async_trait]
impl Handler for StaticFileHandler {
    async fn init(&mut self, _info: &mut trillium::Info) {
        self.root_is_file = match self.resolve("/").await {
            Some(Record::File(path, _)) => {
                log::info!("serving {:?} for all paths", path);
                true
            }

            Some(Record::Dir(dir)) => {
                log::info!("serving files within {:?}", dir);
                false
            }

            None => {
                log::error!(
                    "could not find {:?} on init, continuing anyway",
                    self.fs_root
                );
                false
            }
        };
    }

    async fn run(&self, conn: Conn) -> Conn {
        match self.resolve(conn.path()).await {
            Some(Record::File(path, file)) => conn.send_file(file).await.with_mime_from_path(path),

            Some(Record::Dir(path)) => {
                let index = conn_unwrap!(self.index_file.as_ref(), conn);
                let path = path.join(index);
                let file = conn_unwrap!(File::open(path.to_str().unwrap()).await.ok(), conn);
                conn.send_file_with_options(file, &self.options)
                    .await
                    .with_mime_from_path(path)
            }

            _ => conn,
        }
    }
}