[][src]Function async_std::fs::read_to_string

pub async fn read_to_string<P: AsRef<Path>>(path: P) -> Result<String>

Reads the entire contents of a file as a string.

This is a convenience function for reading entire files. It pre-allocates a string based on the file size when available, so it is typically faster than manually opening a file and reading from it.

If you want to read the contents as raw bytes, use read instead.

This function is an async version of std::fs::read_to_string.


An error will be returned in the following situations:

  • path does not point to an existing file.
  • The current process lacks permissions to read the file.
  • The contents of the file cannot be read as a UTF-8 string.
  • Some other I/O error occurred.


use async_std::fs;

let contents = fs::read_to_string("a.txt").await?;