one of your examples doesnt work

[lever1209]

use curl::easy::Easy;

// Capture output into a local `Vec`.
fn main() {
    let mut dst = Vec::new();
    let mut easy = Easy::new();
    easy.url("https://www.rust-lang.org/").unwrap();

    let mut transfer = easy.transfer();
    transfer.write_function(|data| {
        dst.extend_from_slice(data);
        Ok(data.len())
    }).unwrap();
    transfer.perform().unwrap();
	println!("{:?}", dst);
}

ive added that last println! line as a basic way to show theres no way to access the data after its written to, unless im missing something fundamental about closures

[sagebind]

The closure passed to write_function borrows dst. The transfer object holds onto that closure until the transfer is dropped, meaning that dst is also now borrowed until transfer is dropped. To access dst you need to ensure the transfer is dropped to guarantee it will not write any further to dst. In this short example you could do that like this:

use curl::easy::Easy;

// Capture output into a local `Vec`.
fn main() {
    let mut dst = Vec::new();
    let mut easy = Easy::new();
    easy.url("https://www.rust-lang.org/").unwrap();

    {
        let mut transfer = easy.transfer();
        transfer.write_function(|data| {
            dst.extend_from_slice(data);
            Ok(data.len())
        }).unwrap();
        transfer.perform().unwrap();
    }

    println!("{:?}", dst);
}

or more explicitly like this:

use curl::easy::Easy;

// Capture output into a local `Vec`.
fn main() {
    let mut dst = Vec::new();
    let mut easy = Easy::new();
    easy.url("https://www.rust-lang.org/").unwrap();

    let mut transfer = easy.transfer();
    transfer.write_function(|data| {
        dst.extend_from_slice(data);
        Ok(data.len())
    }).unwrap();
    transfer.perform().unwrap();
    drop(transfer);

    println!("{:?}", dst);
}

Hope that helps!

[lever1209]

i already tried that and it didnt work, maybe i missed something

but ive already moved the project to a shell script and its 90% done

[LorenzoLeonardo]

Best to Use Easy2.