async fn write_backup(mut body: Body, backup_id: &str, backup_path: &Path) -> anyhow::Result<bool> {
    // The incoming stream will be written to a temporary file. This is done to prevent
    // incomplete backups from being persisted.
    let random_ext: String = {
        let mut rng = rand::thread_rng();
        std::iter::repeat(())
            .map(|_| rng.sample(rand::distributions::Alphanumeric))
            .map(char::from)
            .take(10)
            .collect()
    };
    let backup_path_dl = backup_path.with_extension(random_ext);
    trace!("Writing temporary upload to {:?}", backup_path_dl);
    if backup_path_dl.exists() {
        bail!(
            "Random upload path \"{:?}\" already exists!",
            backup_path_dl
        );
    }

    // Create the empty download file to ensure correct permissions before
    // writing the data
    let mut backup_file_dl = create_file(&backup_path_dl)
        .await
        .context("Could not create temporary file")?;

    // Write data to temporary file
    while let Some(chunk_or_error) = body.next().await {
        let chunk = chunk_or_error.context("Could not read body chunk")?;
        backup_file_dl
            .write_all(&chunk)
            .await
            .context("Could not write chunk to temporary file")?
    }
    trace!("Wrote temp backup for {}", backup_id);

    // Move temporary file to final location
    let updated = backup_path.exists() && backup_path.is_file();
    fs::rename(&backup_path_dl, &backup_path)
        .await
        .context("Could not move temporary backup to final location")?;
    trace!("Renamed: {:?} -> {:?}", backup_path_dl, backup_path);

    Ok(updated)
}
/// Store the backup to the file system.
///
/// Return true if an existing backup was updated, or false if a new backup was created.
Store the backup to the file system.
Return true if an existing backup was updated, or false if a new backup was created.
Store the backup to the file system . Return true if an existing backup was updated or false if a new backup was created .
async fn write_backup(mut body: Body, backup_id: &str, backup_path: &Path) -> anyhow::Result<bool> {
    // The incoming stream will be written to a temporary file. This is done to prevent
    // incomplete backups from being persisted.
    let random_ext: String = {
        let mut rng = rand::thread_rng();
        std::iter::repeat(())
            .map(|_| rng.sample(rand::distributions::Alphanumeric))
            .map(char::from)
            .take(10)
            .collect()
    };
    let backup_path_dl = backup_path.with_extension(random_ext);
    trace!("Writing temporary upload to {:?}", backup_path_dl);
    if backup_path_dl.exists() {
        bail!(
            "Random upload path \"{:?}\" already exists!",
            backup_path_dl
        );
    }
    // Create the empty download file to ensure correct permissions before
    // writing the data
    let mut backup_file_dl = create_file(&backup_path_dl)
        .await
        .context("Could not create temporary file")?;
    // Write data to temporary file
    while let Some(chunk_or_error) = body.next().await {
        let chunk = chunk_or_error.context("Could not read body chunk")?;
        backup_file_dl
            .write_all(&chunk)
            .await
            .context("Could not write chunk to temporary file")?
    }
    trace!("Wrote temp backup for {}", backup_id);
    // Move temporary file to final location
    let updated = backup_path.exists() && backup_path.is_file();
    fs::rename(&backup_path_dl, &backup_path)
        .await
        .context("Could not move temporary backup to final location")?;
    trace!("Renamed: {:?} -> {:?}", backup_path_dl, backup_path);
    Ok(updated)
}
async fn write_backup ( mut body : Body , backup_id : & str , backup_path : & Path ) -> anyhow :: Result < bool > { // The incoming stream will be written to a temporary file. This is done to prevent // incomplete backups from being persisted. let random_ext : String = { let mut rng = rand :: thread_rng ( ) ; std :: iter :: repeat ( ( ) ) . map ( | _ | rng . sample ( rand :: distributions :: Alphanumeric ) ) . map ( char :: from ) . take ( 10 ) . collect ( ) } ; let backup_path_dl = backup_path . with_extension ( random_ext ) ; trace ! ( " " backup_path_dl ) ; if backup_path_dl . exists ( ) { bail ! ( " \" \" " backup_path_dl ) ; } // Create the empty download file to ensure correct permissions before // writing the data let mut backup_file_dl = create_file ( & backup_path_dl ) . await . context ( " " ) ? ; // Write data to temporary file while let Some ( chunk_or_error ) = body . next ( ) . await { let chunk = chunk_or_error . context ( " " ) ? ; backup_file_dl . write_all ( & chunk ) . await . context ( " " ) ? } trace ! ( " " backup_id ) ; // Move temporary file to final location let updated = backup_path . exists ( ) && backup_path . is_file ( ) ; fs :: rename ( & backup_path_dl , & backup_path ) . await . context ( " " ) ? ; trace ! ( " " backup_path_dl backup_path ) ; Ok ( updated ) }
Store the backup to the file system.
Store the backup to the file system .
body
Body
backup_id
&str
backup_path
&Path
body
Body
backup_id
&str
backup_path
&Path