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#[macro_use]
extern crate derive_error;
extern crate fallible_iterator;
extern crate hyper;
extern crate rusoto_core;
extern crate rusoto_credential;
extern crate rusoto_s3;
pub mod iter;
use iter::ObjectIter;
pub mod error;
use error::{S4Error, S4Result};
use hyper::Client;
use rusoto_core::{default_tls_client, DispatchSignedRequest, Region};
use rusoto_credential::{CredentialsError, DefaultCredentialsProvider, ProvideAwsCredentials,
StaticProvider};
use rusoto_s3::{GetObjectOutput, GetObjectRequest, S3, S3Client};
use std::convert::AsRef;
use std::fs::OpenOptions;
use std::io::{self, Write};
use std::path::Path;
pub fn new_s3client_with_credentials(
region: Region,
access_key: String,
secret_key: String,
) -> S3Client<StaticProvider, Client> {
S3Client::new(
default_tls_client().expect("failed to initialize TLS client"),
StaticProvider::new_minimal(access_key, secret_key),
region,
)
}
pub fn new_s3client_simple(
region: Region,
) -> Result<S3Client<DefaultCredentialsProvider, Client>, CredentialsError> {
Ok(S3Client::new(
default_tls_client().expect("failed to initialize TLS client"),
DefaultCredentialsProvider::new()?,
region,
))
}
pub trait S4<P, D>
where
P: ProvideAwsCredentials,
D: DispatchSignedRequest,
{
fn object_to_file<F>(&self, source: &GetObjectRequest, target: F) -> S4Result<GetObjectOutput>
where
F: AsRef<Path>;
fn object_to_write<W>(
&self,
source: &GetObjectRequest,
target: &mut W,
) -> S4Result<GetObjectOutput>
where
W: Write;
fn iter_objects(&self, bucket: &str) -> ObjectIter<P, D>;
fn iter_objects_with_prefix(&self, bucket: &str, prefix: &str) -> ObjectIter<P, D>;
}
impl<P, D> S4<P, D> for S3Client<P, D>
where
P: ProvideAwsCredentials,
D: DispatchSignedRequest,
{
fn object_to_file<F>(
&self,
source: &GetObjectRequest,
target: F,
) -> Result<GetObjectOutput, S4Error>
where
F: AsRef<Path>,
{
let mut resp = self.get_object(source)?;
let mut body = resp.body.take().expect("no body");
let mut target = OpenOptions::new()
.write(true)
.create_new(true)
.open(target)?;
io::copy(&mut body, &mut target)?;
Ok(resp)
}
fn object_to_write<W>(
&self,
source: &GetObjectRequest,
mut target: &mut W,
) -> Result<GetObjectOutput, S4Error>
where
W: Write,
{
let mut resp = self.get_object(source)?;
let mut body = resp.body.take().expect("no body");
io::copy(&mut body, &mut target)?;
Ok(resp)
}
#[inline]
fn iter_objects(&self, bucket: &str) -> ObjectIter<P, D> {
ObjectIter::new(self, bucket, None)
}
#[inline]
fn iter_objects_with_prefix(&self, bucket: &str, prefix: &str) -> ObjectIter<P, D> {
ObjectIter::new(self, bucket, Some(prefix))
}
}