pub async fn read(path: impl AsRef<Path>) -> Result<Vec<u8>, Error>Expand description
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().
This operation is implemented by running the equivalent blocking operation
on a separate thread pool using spawn_blocking.
§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(())
}