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// Copyright (C) 2017 Author: Arun Raghavan <arun@arunraghavan.net>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use std::str::FromStr;
use percent_encoding::{percent_decode, percent_encode, AsciiSet, CONTROLS};
use rusoto_core::Region;
use url::Url;
#[derive(Clone)]
pub struct GstS3Url {
pub region: Region,
pub bucket: String,
pub object: String,
pub version: Option<String>,
}
// FIXME: Copied from the url crate, see https://github.com/servo/rust-url/issues/529
// https://url.spec.whatwg.org/#fragment-percent-encode-set
const FRAGMENT: &AsciiSet = &CONTROLS.add(b' ').add(b'"').add(b'<').add(b'>').add(b'`');
// https://url.spec.whatwg.org/#path-percent-encode-set
const PATH: &AsciiSet = &FRAGMENT.add(b'#').add(b'?').add(b'{').add(b'}');
const PATH_SEGMENT: &AsciiSet = &PATH.add(b'/').add(b'%');
impl ToString for GstS3Url {
fn to_string(&self) -> String {
format!(
"s3://{}/{}/{}{}",
self.region.name(),
self.bucket,
percent_encode(self.object.as_bytes(), PATH_SEGMENT),
if self.version.is_some() {
format!("?version={}", self.version.clone().unwrap())
} else {
"".to_string()
}
)
}
}
pub fn parse_s3_url(url_str: &str) -> Result<GstS3Url, String> {
let url = Url::parse(url_str).map_err(|err| format!("Parse error: {}", err))?;
if url.scheme() != "s3" {
return Err(format!("Unsupported URI '{}'", url.scheme()));
}
if !url.has_host() {
return Err(format!("Invalid host in uri '{}'", url));
}
let host = url.host_str().unwrap();
let region = Region::from_str(host).map_err(|_| format!("Invalid region '{}'", host))?;
let mut path = url
.path_segments()
.ok_or_else(|| format!("Invalid uri '{}'", url))?;
let bucket = path.next().unwrap().to_string();
let o = path
.next()
.ok_or_else(|| format!("Invalid empty object/bucket '{}'", url))?;
let mut object = percent_decode(o.as_bytes())
.decode_utf8()
.unwrap()
.to_string();
if o.is_empty() {
return Err(format!("Invalid empty object/bucket '{}'", url));
}
object = path.fold(object, |o, p| format!("{}/{}", o, p));
let mut q = url.query_pairs();
let v = q.next();
let version;
match v {
Some((ref k, ref v)) if k == "version" => version = Some((*v).to_string()),
None => version = None,
Some(_) => return Err("Bad query, only 'version' is supported".to_owned()),
}
if q.next() != None {
return Err("Extra query terms, only 'version' is supported".to_owned());
}
Ok(GstS3Url {
region,
bucket,
object,
version,
})
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn cannot_be_base() {
assert!(parse_s3_url("data:something").is_err());
}
#[test]
fn invalid_scheme() {
assert!(parse_s3_url("file:///dev/zero").is_err());
}
#[test]
fn bad_region() {
assert!(parse_s3_url("s3://atlantis-1/i-hope-we/dont-find-this").is_err());
}
#[test]
fn no_bucket() {
assert!(parse_s3_url("s3://ap-south-1").is_err());
assert!(parse_s3_url("s3://ap-south-1/").is_err());
}
#[test]
fn no_object() {
assert!(parse_s3_url("s3://ap-south-1/my-bucket").is_err());
assert!(parse_s3_url("s3://ap-south-1/my-bucket/").is_err());
}
#[test]
fn valid_simple() {
assert!(parse_s3_url("s3://ap-south-1/my-bucket/my-object").is_ok());
}
#[test]
fn extraneous_query() {
assert!(parse_s3_url("s3://ap-south-1/my-bucket/my-object?foo=bar").is_err());
}
#[test]
fn valid_version() {
assert!(parse_s3_url("s3://ap-south-1/my-bucket/my-object?version=one").is_ok());
}
#[test]
fn trailing_slash() {
// Slashes are valid at the end of the object key
assert_eq!(
parse_s3_url("s3://ap-south-1/my-bucket/my-object/")
.unwrap()
.object,
"my-object/"
);
}
#[test]
fn percent_encoding() {
assert_eq!(
parse_s3_url("s3://ap-south-1/my-bucket/my%20object")
.unwrap()
.object,
"my object"
);
}
#[test]
fn percent_decoding() {
assert_eq!(
parse_s3_url("s3://ap-south-1/my-bucket/my object")
.unwrap()
.to_string(),
"s3://ap-south-1/my-bucket/my%20object"
);
}
}
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