Function tokio::fs::read [−][src]
pub async fn read(path: impl AsRef<Path>) -> Result<Vec<u8>>
Reads the entire contents of a file into a bytes vector.
This is an async version of std::fs::read
This is a convenience function for using File::open
and read_to_end
with fewer imports and without an intermediate variable. It pre-allocates a
buffer based on the file size when available, so it is generally faster than
reading into a vector created with Vec::new()
.
Errors
This function will return an error if path
does not already exist.
Other errors may also be returned according to OpenOptions::open
.
It will also return an error if it encounters while reading an error
of a kind other than ErrorKind::Interrupted
.
Examples
use tokio::fs; use std::net::SocketAddr; #[tokio::main] async fn main() -> Result<(), Box<dyn std::error::Error + 'static>> { let contents = fs::read("address.txt").await?; let foo: SocketAddr = String::from_utf8_lossy(&contents).parse()?; Ok(()) }