Struct rocket::fs::NamedFile

source ·
pub struct NamedFile(/* private fields */);
Expand description

A Responder that sends file data with a Content-Type based on its file extension.

Example

A simple static file server mimicking FileServer:

use std::path::{PathBuf, Path};

use rocket::fs::{NamedFile, relative};

#[get("/file/<path..>")]
pub async fn second(path: PathBuf) -> Option<NamedFile> {
    let mut path = Path::new(relative!("static")).join(path);
    if path.is_dir() {
        path.push("index.html");
    }

    NamedFile::open(path).await.ok()
}

Always prefer to use FileServer which has more functionality and a pithier API.

Implementations§

source§

impl NamedFile

source

pub async fn open<P: AsRef<Path>>(path: P) -> Result<NamedFile>

Attempts to open a file in read-only mode.

Errors

This function will return an error if path does not already exist. Other errors may also be returned according to OpenOptions::open().

Example
use rocket::fs::NamedFile;

#[get("/")]
async fn index() -> Option<NamedFile> {
    NamedFile::open("index.html").await.ok()
}
source

pub fn file(&self) -> &File

Retrieve the underlying File.

Example
use rocket::fs::NamedFile;

let named_file = NamedFile::open("index.html").await?;
let file = named_file.file();
source

pub fn file_mut(&mut self) -> &mut File

Retrieve a mutable borrow to the underlying File.

Example
use rocket::fs::NamedFile;

let mut named_file = NamedFile::open("index.html").await?;
let file = named_file.file_mut();
source

pub fn take_file(self) -> File

Take the underlying File.

Example
use rocket::fs::NamedFile;

let named_file = NamedFile::open("index.html").await?;
let file = named_file.take_file();
source

pub fn path(&self) -> &Path

Retrieve the path of this file.

Examples
use rocket::fs::NamedFile;

let file = NamedFile::open("foo.txt").await?;
assert_eq!(file.path().as_os_str(), "foo.txt");

Methods from Deref<Target = File>§

source

pub async fn sync_all(&self) -> impl Future<Output = Result<(), Error>>

Attempts to sync all OS-internal metadata to disk.

This function will attempt to ensure that all in-core data reaches the filesystem before returning.

Examples
use tokio::fs::File;
use tokio::io::AsyncWriteExt;

let mut file = File::create("foo.txt").await?;
file.write_all(b"hello, world!").await?;
file.sync_all().await?;

The write_all method is defined on the AsyncWriteExt trait.

source

pub async fn sync_data(&self) -> impl Future<Output = Result<(), Error>>

This function is similar to sync_all, except that it may not synchronize file metadata to the filesystem.

This is intended for use cases that must synchronize content, but don’t need the metadata on disk. The goal of this method is to reduce disk operations.

Note that some platforms may simply implement this in terms of sync_all.

Examples
use tokio::fs::File;
use tokio::io::AsyncWriteExt;

let mut file = File::create("foo.txt").await?;
file.write_all(b"hello, world!").await?;
file.sync_data().await?;

The write_all method is defined on the AsyncWriteExt trait.

source

pub async fn set_len( &self, size: u64 ) -> impl Future<Output = Result<(), Error>>

Truncates or extends the underlying file, updating the size of this file to become size.

If the size is less than the current file’s size, then the file will be shrunk. If it is greater than the current file’s size, then the file will be extended to size and have all of the intermediate data filled in with 0s.

Errors

This function will return an error if the file is not opened for writing.

Examples
use tokio::fs::File;
use tokio::io::AsyncWriteExt;

let mut file = File::create("foo.txt").await?;
file.write_all(b"hello, world!").await?;
file.set_len(10).await?;

The write_all method is defined on the AsyncWriteExt trait.

source

pub async fn metadata(&self) -> impl Future<Output = Result<Metadata, Error>>

Queries metadata about the underlying file.

Examples
use tokio::fs::File;

let file = File::open("foo.txt").await?;
let metadata = file.metadata().await?;

println!("{:?}", metadata);
source

pub async fn try_clone(&self) -> impl Future<Output = Result<File, Error>>

Creates a new File instance that shares the same underlying file handle as the existing File instance. Reads, writes, and seeks will affect both File instances simultaneously.

Examples
use tokio::fs::File;

let file = File::open("foo.txt").await?;
let file_clone = file.try_clone().await?;
source

pub async fn set_permissions( &self, perm: Permissions ) -> impl Future<Output = Result<(), Error>>

Changes the permissions on the underlying file.

Platform-specific behavior

This function currently corresponds to the fchmod function on Unix and the SetFileInformationByHandle function on Windows. Note that, this may change in the future.

Errors

This function will return an error if the user lacks permission change attributes on the underlying file. It may also return an error in other os-specific unspecified cases.

Examples
use tokio::fs::File;

let file = File::open("foo.txt").await?;
let mut perms = file.metadata().await?.permissions();
perms.set_readonly(true);
file.set_permissions(perms).await?;

Trait Implementations§

source§

impl Debug for NamedFile

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
source§

impl Deref for NamedFile

§

type Target = File

The resulting type after dereferencing.
source§

fn deref(&self) -> &File

Dereferences the value.
source§

impl DerefMut for NamedFile

source§

fn deref_mut(&mut self) -> &mut File

Mutably dereferences the value.
source§

impl<'r> Responder<'r, 'static> for NamedFile

Streams the named file to the client. Sets or overrides the Content-Type in the response according to the file’s extension if the extension is recognized. See ContentType::from_extension() for more information. If you would like to stream a file with a different Content-Type than that implied by its extension, use a File directly.

source§

fn respond_to(self, req: &'r Request<'_>) -> Result<'static>

Returns Ok if a Response could be generated successfully. Otherwise, returns an Err with a failing Status. Read more

Auto Trait Implementations§

Blanket Implementations§

source§

impl<T> Any for Twhere T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for Twhere T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for Twhere T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> Instrument for T

source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for Twhere U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> IntoCollection<T> for T

source§

fn into_collection<A>(self) -> SmallVec<A>where A: Array<Item = T>,

Converts self into a collection.
source§

fn mapped<U, F, A>(self, f: F) -> SmallVec<A>where F: FnMut(T) -> U, A: Array<Item = U>,

source§

impl<T> Paint for Twhere T: ?Sized,

source§

fn fg(&self, value: Color) -> Painted<&T>

Returns a styled value derived from self with the foreground set to value.

This method should be used rarely. Instead, prefer to use color-specific builder methods like red() and green(), which have the same functionality but are pithier.

Example

Set foreground color to white using fg():

use yansi::{Paint, Color};

painted.fg(Color::White);

Set foreground color to white using white().

use yansi::Paint;

painted.white();
source§

fn primary(&self) -> Painted<&T>

Returns self with the fg() set to Color::Primary.

Example
println!("{}", value.primary());
source§

fn fixed(&self, color: u8) -> Painted<&T>

Returns self with the fg() set to Color::Fixed.

Example
println!("{}", value.fixed(color));
source§

fn rgb(&self, r: u8, g: u8, b: u8) -> Painted<&T>

Returns self with the fg() set to Color::Rgb.

Example
println!("{}", value.rgb(r, g, b));
source§

fn black(&self) -> Painted<&T>

Returns self with the fg() set to Color::Black.

Example
println!("{}", value.black());
source§

fn red(&self) -> Painted<&T>

Returns self with the fg() set to Color::Red.

Example
println!("{}", value.red());
source§

fn green(&self) -> Painted<&T>

Returns self with the fg() set to Color::Green.

Example
println!("{}", value.green());
source§

fn yellow(&self) -> Painted<&T>

Returns self with the fg() set to Color::Yellow.

Example
println!("{}", value.yellow());
source§

fn blue(&self) -> Painted<&T>

Returns self with the fg() set to Color::Blue.

Example
println!("{}", value.blue());
source§

fn magenta(&self) -> Painted<&T>

Returns self with the fg() set to Color::Magenta.

Example
println!("{}", value.magenta());
source§

fn cyan(&self) -> Painted<&T>

Returns self with the fg() set to Color::Cyan.

Example
println!("{}", value.cyan());
source§

fn white(&self) -> Painted<&T>

Returns self with the fg() set to Color::White.

Example
println!("{}", value.white());
source§

fn bright_black(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightBlack.

Example
println!("{}", value.bright_black());
source§

fn bright_red(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightRed.

Example
println!("{}", value.bright_red());
source§

fn bright_green(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightGreen.

Example
println!("{}", value.bright_green());
source§

fn bright_yellow(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightYellow.

Example
println!("{}", value.bright_yellow());
source§

fn bright_blue(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightBlue.

Example
println!("{}", value.bright_blue());
source§

fn bright_magenta(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightMagenta.

Example
println!("{}", value.bright_magenta());
source§

fn bright_cyan(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightCyan.

Example
println!("{}", value.bright_cyan());
source§

fn bright_white(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightWhite.

Example
println!("{}", value.bright_white());
source§

fn bg(&self, value: Color) -> Painted<&T>

Returns a styled value derived from self with the background set to value.

This method should be used rarely. Instead, prefer to use color-specific builder methods like on_red() and on_green(), which have the same functionality but are pithier.

Example

Set background color to red using fg():

use yansi::{Paint, Color};

painted.bg(Color::Red);

Set background color to red using on_red().

use yansi::Paint;

painted.on_red();
source§

fn on_primary(&self) -> Painted<&T>

Returns self with the bg() set to Color::Primary.

Example
println!("{}", value.on_primary());
source§

fn on_fixed(&self, color: u8) -> Painted<&T>

Returns self with the bg() set to Color::Fixed.

Example
println!("{}", value.on_fixed(color));
source§

fn on_rgb(&self, r: u8, g: u8, b: u8) -> Painted<&T>

Returns self with the bg() set to Color::Rgb.

Example
println!("{}", value.on_rgb(r, g, b));
source§

fn on_black(&self) -> Painted<&T>

Returns self with the bg() set to Color::Black.

Example
println!("{}", value.on_black());
source§

fn on_red(&self) -> Painted<&T>

Returns self with the bg() set to Color::Red.

Example
println!("{}", value.on_red());
source§

fn on_green(&self) -> Painted<&T>

Returns self with the bg() set to Color::Green.

Example
println!("{}", value.on_green());
source§

fn on_yellow(&self) -> Painted<&T>

Returns self with the bg() set to Color::Yellow.

Example
println!("{}", value.on_yellow());
source§

fn on_blue(&self) -> Painted<&T>

Returns self with the bg() set to Color::Blue.

Example
println!("{}", value.on_blue());
source§

fn on_magenta(&self) -> Painted<&T>

Returns self with the bg() set to Color::Magenta.

Example
println!("{}", value.on_magenta());
source§

fn on_cyan(&self) -> Painted<&T>

Returns self with the bg() set to Color::Cyan.

Example
println!("{}", value.on_cyan());
source§

fn on_white(&self) -> Painted<&T>

Returns self with the bg() set to Color::White.

Example
println!("{}", value.on_white());
source§

fn on_bright_black(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightBlack.

Example
println!("{}", value.on_bright_black());
source§

fn on_bright_red(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightRed.

Example
println!("{}", value.on_bright_red());
source§

fn on_bright_green(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightGreen.

Example
println!("{}", value.on_bright_green());
source§

fn on_bright_yellow(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightYellow.

Example
println!("{}", value.on_bright_yellow());
source§

fn on_bright_blue(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightBlue.

Example
println!("{}", value.on_bright_blue());
source§

fn on_bright_magenta(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightMagenta.

Example
println!("{}", value.on_bright_magenta());
source§

fn on_bright_cyan(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightCyan.

Example
println!("{}", value.on_bright_cyan());
source§

fn on_bright_white(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightWhite.

Example
println!("{}", value.on_bright_white());
source§

fn attr(&self, value: Attribute) -> Painted<&T>

Enables the styling Attribute value.

This method should be used rarely. Instead, prefer to use attribute-specific builder methods like bold() and underline(), which have the same functionality but are pithier.

Example

Make text bold using attr():

use yansi::{Paint, Attribute};

painted.attr(Attribute::Bold);

Make text bold using using bold().

use yansi::Paint;

painted.bold();
source§

fn bold(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Bold.

Example
println!("{}", value.bold());
source§

fn dim(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Dim.

Example
println!("{}", value.dim());
source§

fn italic(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Italic.

Example
println!("{}", value.italic());
source§

fn underline(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Underline.

Example
println!("{}", value.underline());

Returns self with the attr() set to Attribute::Blink.

Example
println!("{}", value.blink());

Returns self with the attr() set to Attribute::RapidBlink.

Example
println!("{}", value.rapid_blink());
source§

fn invert(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Invert.

Example
println!("{}", value.invert());
source§

fn conceal(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Conceal.

Example
println!("{}", value.conceal());
source§

fn strike(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Strike.

Example
println!("{}", value.strike());
source§

fn quirk(&self, value: Quirk) -> Painted<&T>

Enables the yansi Quirk value.

This method should be used rarely. Instead, prefer to use quirk-specific builder methods like mask() and wrap(), which have the same functionality but are pithier.

Example

Enable wrapping using .quirk():

use yansi::{Paint, Quirk};

painted.quirk(Quirk::Wrap);

Enable wrapping using wrap().

use yansi::Paint;

painted.wrap();
source§

fn mask(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Mask.

Example
println!("{}", value.mask());
source§

fn wrap(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Wrap.

Example
println!("{}", value.wrap());
source§

fn linger(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Linger.

Example
println!("{}", value.linger());
source§

fn clear(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Clear.

Example
println!("{}", value.clear());
source§

fn bright(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Bright.

Example
println!("{}", value.bright());
source§

fn on_bright(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::OnBright.

Example
println!("{}", value.on_bright());
source§

fn whenever(&self, value: Condition) -> Painted<&T>

Conditionally enable styling based on whether the Condition value applies. Replaces any previous condition.

See the crate level docs for more details.

Example

Enable styling painted only when both stdout and stderr are TTYs:

use yansi::{Paint, Condition};

painted.red().on_yellow().whenever(Condition::STDOUTERR_ARE_TTY);
source§

fn new(self) -> Painted<Self>where Self: Sized,

Create a new Painted with a default Style. Read more
source§

fn paint<S>(&self, style: S) -> Painted<&Self>where S: Into<Style>,

Apply a style wholesale to self. Any previous style is replaced. Read more
source§

impl<T> Same<T> for T

§

type Output = T

Should always be Self
source§

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

source§

fn vzip(self) -> V

source§

impl<T> WithSubscriber for T

source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more