AWS S3 Signed PUT URL

A simple utility to generate S3 signed PUT URL. The AWS CLI does not support generating a signed PUT URL. AWS documentation indicates using an API to generate the signed URL. This utility is used to generate static binaries on various platforms, which allows easy deployment without dependencies.

Download prebuilt binaries from GitHub releases.

    
use clap::Parser;
use s3_presign::{Bucket, Credentials, put};

#[derive(Parser, Debug, Clone)]
#[command(version, about, long_about = None, ignore_errors(true))]
struct Cli
{
  /// The AWS region where the bucket is located
  #[clap(short = 'r', long = "region")]
  region: String,
  /// The AWS bucket for which the signed PUT url is to be generated
  #[clap(short = 'b', long = "bucket")]
  bucket: String,
  /// The virtual path within the bucket for the destination object
  #[clap(short = 'k', long = "key")]
  key: String,
  /// The expiration time in seconds for the signed PUT url
  #[arg(short, long, default_value_t = 86400)]
  expiration: i64
}

fn main()
{
  let args = Cli::parse();

  let key = std::env::var("AWS_ACCESS_KEY_ID");
  if key.is_err() 
  {
    println!("AWS_ACCESS_KEY_ID environment variable is not set");
    std::process::exit(1);
  }
  let key = key.unwrap();

  let secret = std::env::var("AWS_SECRET_ACCESS_KEY");
  if secret.is_err() 
  {
    println!("AWS_SECRET_ACCESS_KEY environment variable is not set");
    std::process::exit(1);
  }
  let secret = secret.unwrap();

  let credentials = Credentials::new(key.as_str(), secret.as_str(), None);
  let bucket = Bucket::new(args.region.as_str(), args.bucket.as_str());
  let url = put(&credentials, &bucket, args.key.as_str(), args.expiration).unwrap();
  println!("{}", url);
}
    
    

    
[package]
name = "s3-signed-put"
version = "0.1.0"
edition = "2024"

[dependencies]
clap = { version = "4.0", features = ["derive"] }
s3-presign = "0.0.3"
    
    

Last modified: 10 March 2026