Work on API

2024-11-21 15:41:02 +00:00 · 2020-04-28 10:18:14 +00:00 · 2020-04-28 10:18:14 +00:00 · 0957d0fdfa
commit 0957d0fdfa
parent be35cbdce2
11 changed files with 364 additions and 120 deletions
--- a/.gitignore
+++ b/.gitignore
@ -2,3 +2,4 @@
 /tmp
 /pki
 **/*.rs.bk
+*.swp
--- a/src/api/api_server.rs
+++ b/src/api/api_server.rs
@ -14,6 +14,8 @@ use garage_core::garage::Garage;
 use crate::http_util::*;
 use crate::signature::check_signature;

+use crate::s3_copy::*;
+use crate::s3_delete::*;
 use crate::s3_get::*;
 use crate::s3_list::*;
 use crate::s3_put::*;
@ -71,15 +73,7 @@ async fn handler_inner(
 	req: Request<Body>,
 ) -> Result<Response<BodyType>, Error> {
 	let path = req.uri().path().to_string();
-	let path = path.trim_start_matches('/');
-	let (bucket, key) = match path.find('/') {
-		Some(i) => {
-			let (bucket, key) = path.split_at(i);
-			let key = key.trim_start_matches('/');
-			(bucket, Some(key))
-		}
-		None => (path, None),
-	};
+	let (bucket, key) = parse_bucket_key(path.as_str())?;
 	if bucket.len() == 0 {
 		return Err(Error::Forbidden(format!(
 			"Operations on buckets not allowed"
@ -116,14 +110,28 @@ async fn handler_inner(
 				Ok(handle_get(garage, &bucket, &key).await?)
 			}
 			&Method::PUT => {
-				if ["partnumber", "uploadid"]
-					.iter()
-					.all(|x| params.contains_key(&x.to_string()))
+				if params.contains_key(&"partnumber".to_string())
+					&& params.contains_key(&"uploadid".to_string())
 				{
 					// UploadPart query
 					let part_number = params.get("partnumber").unwrap();
 					let upload_id = params.get("uploadid").unwrap();
 					Ok(handle_put_part(garage, req, &bucket, &key, part_number, upload_id).await?)
+				} else if req.headers().contains_key("x-amz-copy-source") {
+					// CopyObject query
+					let copy_source = req.headers().get("x-amz-copy-source").unwrap().to_str()?;
+					let (source_bucket, source_key) = parse_bucket_key(copy_source)?;
+					if !api_key.allow_read(&source_bucket) {
+						return Err(Error::Forbidden(format!(
+							"Reading from bucket {} not allowed for this key",
+							source_bucket
+						)));
+					}
+					let source_key = match source_key {
+						None => return Err(Error::BadRequest(format!("No source key specified"))),
+						Some(x) => x,
+					};
+					Ok(handle_copy(garage, &bucket, &key, &source_bucket, &source_key).await?)
 				} else {
 					// PutObject query
 					Ok(handle_put(garage, req, &bucket, &key).await?)
@ -148,7 +156,10 @@ async fn handler_inner(
 				} else if params.contains_key(&"uploadid".to_string()) {
 					// CompleteMultipartUpload call
 					let upload_id = params.get("uploadid").unwrap();
-					Ok(handle_complete_multipart_upload(garage, req, &bucket, &key, upload_id).await?)
+					Ok(
+						handle_complete_multipart_upload(garage, req, &bucket, &key, upload_id)
+							.await?,
+					)
 				} else {
 					Err(Error::BadRequest(format!(
 						"Not a CreateMultipartUpload call, what is it?"
@ -176,12 +187,9 @@ async fn handler_inner(
 				))
 			}
 			&Method::GET => {
-				if ["delimiter", "prefix"]
-					.iter()
-					.all(|x| params.contains_key(&x.to_string()))
-				{
+				if params.contains_key(&"prefix".to_string()) {
 					// ListObjects query
-					let delimiter = params.get("delimiter").unwrap();
+					let delimiter = params.get("delimiter").map(|x| x.as_str()).unwrap_or(&"");
 					let max_keys = params
 						.get("max-keys")
 						.map(|x| {
@ -191,7 +199,21 @@ async fn handler_inner(
 						})
 						.unwrap_or(Ok(1000))?;
 					let prefix = params.get("prefix").unwrap();
-					Ok(handle_list(garage, bucket, delimiter, max_keys, prefix).await?)
+					let urlencode_resp = params
+						.get("encoding-type")
+						.map(|x| x == "url")
+						.unwrap_or(false);
+					let marker = params.get("marker").map(String::as_str);
+					Ok(handle_list(
+						garage,
+						bucket,
+						delimiter,
+						max_keys,
+						prefix,
+						marker,
+						urlencode_resp,
+					)
+					.await?)
 				} else {
 					Err(Error::BadRequest(format!(
 						"Not a list call, so what is it?"
@ -202,3 +224,18 @@ async fn handler_inner(
 		}
 	}
 }
+
+fn parse_bucket_key(path: &str) -> Result<(&str, Option<&str>), Error> {
+	if !path.starts_with('/') {
+		return Err(Error::BadRequest(format!(
+			"Invalid path: {}, should start with a /",
+			path
+		)));
+	}
+	let path = &path[1..];
+
+	match path.find('/') {
+		Some(i) => Ok((&path[..i], Some(&path[i + 1..]))),
+		None => Ok((path, None)),
+	}
+}
--- a/src/api/encoding.rs
+++ b/src/api/encoding.rs
@ -0,0 +1,33 @@
+pub fn xml_escape(s: &str) -> String {
+	s.replace("<", "&lt;")
+		.replace(">", "&gt;")
+		.replace("\"", "&quot;")
+}
+
+pub fn uri_encode(string: &str, encode_slash: bool) -> String {
+	let mut result = String::with_capacity(string.len() * 2);
+	for c in string.chars() {
+		match c {
+			'a'..='z' | 'A'..='Z' | '0'..='9' | '_' | '-' | '~' | '.' => result.push(c),
+			'/' if encode_slash => result.push_str("%2F"),
+			'/' if !encode_slash => result.push('/'),
+			_ => {
+				result.push_str(
+					&format!("{}", c)
+						.bytes()
+						.map(|b| format!("%{:02X}", b))
+						.collect::<String>(),
+				);
+			}
+		}
+	}
+	result
+}
+
+pub fn xml_encode_key(k: &str, urlencode: bool) -> String {
+	if urlencode {
+		uri_encode(k, true)
+	} else {
+		xml_escape(k)
+	}
+}
--- a/src/api/http_util.rs
+++ b/src/api/http_util.rs
@ -82,9 +82,3 @@ impl From<Vec<u8>> for BytesBody {
 		Self::new(Bytes::from(x))
 	}
 }
-
-pub fn xml_escape(s: &str) -> String {
-	s.replace("<", "&lt;")
-		.replace(">", "&gt;")
-		.replace("\"", "&quot;")
-}
--- a/src/api/lib.rs
+++ b/src/api/lib.rs
@ -1,10 +1,14 @@
 #[macro_use]
 extern crate log;

-pub mod api_server;
+pub mod encoding;
 pub mod http_util;
+
+pub mod api_server;
 pub mod signature;

+pub mod s3_copy;
+pub mod s3_delete;
 pub mod s3_get;
 pub mod s3_list;
 pub mod s3_put;
--- a/src/api/s3_copy.rs
+++ b/src/api/s3_copy.rs
@ -0,0 +1,120 @@
+use std::fmt::Write;
+use std::sync::Arc;
+
+use chrono::{SecondsFormat, Utc};
+use hyper::Response;
+
+use garage_table::*;
+use garage_util::data::*;
+use garage_util::error::Error;
+
+use garage_core::block_ref_table::*;
+use garage_core::garage::Garage;
+use garage_core::object_table::*;
+use garage_core::version_table::*;
+
+use crate::http_util::*;
+
+pub async fn handle_copy(
+	garage: Arc<Garage>,
+	dest_bucket: &str,
+	dest_key: &str,
+	source_bucket: &str,
+	source_key: &str,
+) -> Result<Response<BodyType>, Error> {
+	let source_object = match garage
+		.object_table
+		.get(&source_bucket.to_string(), &source_key.to_string())
+		.await?
+	{
+		None => return Err(Error::NotFound),
+		Some(o) => o,
+	};
+
+	let source_last_v = match source_object
+		.versions()
+		.iter()
+		.rev()
+		.filter(|v| v.is_complete())
+		.next()
+	{
+		Some(v) => v,
+		None => return Err(Error::NotFound),
+	};
+
+	let new_uuid = gen_uuid();
+	let dest_object_version = ObjectVersion {
+		uuid: new_uuid,
+		timestamp: now_msec(),
+		mime_type: source_last_v.mime_type.clone(),
+		size: source_last_v.size,
+		state: ObjectVersionState::Complete,
+		data: source_last_v.data.clone(),
+	};
+
+	match &source_last_v.data {
+		ObjectVersionData::Uploading => {
+			return Err(Error::Message(format!(
+				"Version is_complete() but data is stil Uploading (internal error)"
+			)));
+		}
+		ObjectVersionData::DeleteMarker => {
+			return Err(Error::NotFound);
+		}
+		ObjectVersionData::Inline(_bytes) => {
+			let dest_object = Object::new(
+				dest_bucket.to_string(),
+				dest_key.to_string(),
+				vec![dest_object_version],
+			);
+			garage.object_table.insert(&dest_object).await?;
+		}
+		ObjectVersionData::FirstBlock(_first_block_hash) => {
+			let source_version = garage
+				.version_table
+				.get(&source_last_v.uuid, &EmptyKey)
+				.await?;
+			let source_version = match source_version {
+				Some(v) => v,
+				None => return Err(Error::NotFound),
+			};
+
+			let dest_version = Version::new(
+				new_uuid,
+				dest_bucket.to_string(),
+				dest_key.to_string(),
+				false,
+				source_version.blocks().to_vec(),
+			);
+			let dest_object = Object::new(
+				dest_bucket.to_string(),
+				dest_key.to_string(),
+				vec![dest_object_version],
+			);
+			let dest_block_refs = dest_version
+				.blocks()
+				.iter()
+				.map(|b| BlockRef {
+					block: b.hash,
+					version: new_uuid,
+					deleted: false,
+				})
+				.collect::<Vec<_>>();
+			futures::try_join!(
+				garage.object_table.insert(&dest_object),
+				garage.version_table.insert(&dest_version),
+				garage.block_ref_table.insert_many(&dest_block_refs[..]),
+			)?;
+		}
+	}
+
+	let now = Utc::now();
+	let last_modified = now.to_rfc3339_opts(SecondsFormat::Secs, true);
+	let mut xml = String::new();
+	writeln!(&mut xml, r#"<?xml version="1.0" encoding="UTF-8"?>"#).unwrap();
+	writeln!(&mut xml, r#"<CopyObjectResult>"#).unwrap();
+	writeln!(&mut xml, "\t<LastModified>{}</LastModified>", last_modified).unwrap();
+	writeln!(&mut xml, "</CopyObjectResult>").unwrap();
+
+	Ok(Response::new(Box::new(BytesBody::from(xml.into_bytes()))))
+}
--- a/src/api/s3_delete.rs
+++ b/src/api/s3_delete.rs
@ -0,0 +1,54 @@
+use std::sync::Arc;
+
+use garage_util::data::*;
+use garage_util::error::Error;
+
+use garage_core::garage::Garage;
+use garage_core::object_table::*;
+
+pub async fn handle_delete(garage: Arc<Garage>, bucket: &str, key: &str) -> Result<UUID, Error> {
+	let object = match garage
+		.object_table
+		.get(&bucket.to_string(), &key.to_string())
+		.await?
+	{
+		None => {
+			// No need to delete
+			return Ok([0u8; 32].into());
+		}
+		Some(o) => o,
+	};
+
+	let interesting_versions = object.versions().iter().filter(|v| {
+		v.data != ObjectVersionData::DeleteMarker && v.state != ObjectVersionState::Aborted
+	});
+
+	let mut must_delete = false;
+	let mut timestamp = now_msec();
+	for v in interesting_versions {
+		must_delete = true;
+		timestamp = std::cmp::max(timestamp, v.timestamp + 1);
+	}
+
+	if !must_delete {
+		return Ok([0u8; 32].into());
+	}
+
+	let version_uuid = gen_uuid();
+
+	let object = Object::new(
+		bucket.into(),
+		key.into(),
+		vec![ObjectVersion {
+			uuid: version_uuid,
+			timestamp: now_msec(),
+			mime_type: "application/x-delete-marker".into(),
+			size: 0,
+			state: ObjectVersionState::Complete,
+			data: ObjectVersionData::DeleteMarker,
+		}],
+	);
+
+	garage.object_table.insert(&object).await?;
+	return Ok(version_uuid);
+}
--- a/src/api/s3_list.rs
+++ b/src/api/s3_list.rs
@ -9,6 +9,7 @@ use garage_util::error::Error;

 use garage_core::garage::Garage;

+use crate::encoding::*;
 use crate::http_util::*;

 #[derive(Debug)]
@ -23,11 +24,13 @@ pub async fn handle_list(
 	delimiter: &str,
 	max_keys: usize,
 	prefix: &str,
+	marker: Option<&str>,
+	urlencode_resp: bool,
 ) -> Result<Response<BodyType>, Error> {
 	let mut result_keys = BTreeMap::<String, ListResultInfo>::new();
 	let mut result_common_prefixes = BTreeSet::<String>::new();
 	let mut truncated = true;
-	let mut next_chunk_start = prefix.to_string();
+	let mut next_chunk_start = marker.unwrap_or(prefix).to_string();

 	debug!("List request: `{}` {} `{}`", delimiter, max_keys, prefix);

@ -97,7 +100,12 @@ pub async fn handle_list(
 		let last_modif = DateTime::<Utc>::from_utc(last_modif, Utc);
 		let last_modif = last_modif.to_rfc3339_opts(SecondsFormat::Millis, true);
 		writeln!(&mut xml, "\t<Contents>").unwrap();
-		writeln!(&mut xml, "\t\t<Key>{}</Key>", xml_escape(key)).unwrap();
+		writeln!(
+			&mut xml,
+			"\t\t<Key>{}</Key>",
+			xml_encode_key(key, urlencode_resp)
+		)
+		.unwrap();
 		writeln!(&mut xml, "\t\t<LastModified>{}</LastModified>", last_modif).unwrap();
 		writeln!(&mut xml, "\t\t<Size>{}</Size>", info.size).unwrap();
 		writeln!(&mut xml, "\t\t<StorageClass>STANDARD</StorageClass>").unwrap();
@ -106,7 +114,12 @@ pub async fn handle_list(
 	if result_common_prefixes.len() > 0 {
 		writeln!(&mut xml, "\t<CommonPrefixes>").unwrap();
 		for pfx in result_common_prefixes.iter() {
-			writeln!(&mut xml, "\t<Prefix>{}</Prefix>", xml_escape(pfx)).unwrap();
+			writeln!(
+				&mut xml,
+				"\t<Prefix>{}</Prefix>",
+				xml_encode_key(pfx, urlencode_resp)
+			)
+			.unwrap();
 		}
 		writeln!(&mut xml, "\t</CommonPrefixes>").unwrap();
 	}
--- a/src/api/s3_put.rs
+++ b/src/api/s3_put.rs
@ -5,9 +5,9 @@ use std::sync::Arc;
 use futures::stream::*;
 use hyper::{Body, Request, Response};

+use garage_table::*;
 use garage_util::data::*;
 use garage_util::error::Error;
-use garage_table::*;

 use garage_core::block::INLINE_THRESHOLD;
 use garage_core::block_ref_table::*;
@ -15,6 +15,7 @@ use garage_core::garage::Garage;
 use garage_core::object_table::*;
 use garage_core::version_table::*;

+use crate::encoding::*;
 use crate::http_util::*;

 pub async fn handle_put(
@ -30,7 +31,7 @@ pub async fn handle_put(
 	let mut chunker = BodyChunker::new(body, garage.config.block_size);
 	let first_block = match chunker.next().await? {
 		Some(x) => x,
-		None => return Err(Error::BadRequest(format!("Empty body"))),
+		None => vec![],
 	};

 	let mut object_version = ObjectVersion {
@ -58,7 +59,15 @@ pub async fn handle_put(
 	let object = Object::new(bucket.into(), key.into(), vec![object_version.clone()]);
 	garage.object_table.insert(&object).await?;

-	let total_size = read_and_put_blocks(&garage, version, 1, first_block, first_block_hash, &mut chunker).await?;
+	let total_size = read_and_put_blocks(
+		&garage,
+		version,
+		1,
+		first_block,
+		first_block_hash,
+		&mut chunker,
+	)
+	.await?;

 	// TODO: if at any step we have an error, we should undo everything we did

@ -80,8 +89,14 @@ async fn read_and_put_blocks(
 	chunker: &mut BodyChunker,
 ) -> Result<u64, Error> {
 	let mut next_offset = first_block.len();
-	let mut put_curr_version_block =
-		put_block_meta(garage.clone(), &version, part_number, 0, first_block_hash, first_block.len() as u64);
+	let mut put_curr_version_block = put_block_meta(
+		garage.clone(),
+		&version,
+		part_number,
+		0,
+		first_block_hash,
+		first_block.len() as u64,
+	);
 	let mut put_curr_block = garage
 		.block_manager
 		.rpc_put_block(first_block_hash, first_block);
@ -92,8 +107,14 @@ async fn read_and_put_blocks(
 		if let Some(block) = next_block {
 			let block_hash = hash(&block[..]);
 			let block_len = block.len();
-			put_curr_version_block =
-				put_block_meta(garage.clone(), &version, part_number, next_offset as u64, block_hash, block_len as u64);
+			put_curr_version_block = put_block_meta(
+				garage.clone(),
+				&version,
+				part_number,
+				next_offset as u64,
+				block_hash,
+				block_len as u64,
+			);
 			put_curr_block = garage.block_manager.rpc_put_block(block_hash, block);
 			next_offset += block_len;
 		} else {
@ -232,8 +253,9 @@ pub async fn handle_put_part(
 		.parse::<u64>()
 		.map_err(|e| Error::BadRequest(format!("Invalid part number: {}", e)))?;

-	let version_uuid = uuid_from_str(upload_id).map_err(|_| Error::BadRequest(format!("Invalid upload ID")))?;
-	
+	let version_uuid =
+		uuid_from_str(upload_id).map_err(|_| Error::BadRequest(format!("Invalid upload ID")))?;
+
 	// Read first chuck, and at the same time try to get object to see if it exists
 	let mut chunker = BodyChunker::new(req.into_body(), garage.config.block_size);

@ -265,7 +287,15 @@ pub async fn handle_put_part(
 	// Copy block to store
 	let version = Version::new(version_uuid, bucket.into(), key.into(), false, vec![]);
 	let first_block_hash = hash(&first_block[..]);
-	read_and_put_blocks(&garage, version, part_number, first_block, first_block_hash, &mut chunker).await?;
+	read_and_put_blocks(
+		&garage,
+		version,
+		part_number,
+		first_block,
+		first_block_hash,
+		&mut chunker,
+	)
+	.await?;

 	Ok(Response::new(Box::new(BytesBody::from(vec![]))))
 }
@ -277,7 +307,8 @@ pub async fn handle_complete_multipart_upload(
 	key: &str,
 	upload_id: &str,
 ) -> Result<Response<BodyType>, Error> {
-	let version_uuid = uuid_from_str(upload_id).map_err(|_| Error::BadRequest(format!("Invalid upload ID")))?;
+	let version_uuid =
+		uuid_from_str(upload_id).map_err(|_| Error::BadRequest(format!("Invalid upload ID")))?;

 	let bucket = bucket.to_string();
 	let key = key.to_string();
@ -295,9 +326,11 @@ pub async fn handle_complete_multipart_upload(
 			&& v.data == ObjectVersionData::Uploading
 	});
 	let mut object_version = match object_version {
-		None => return Err(Error::BadRequest(format!(
-			"Multipart upload does not exist or has already been completed"
-		))),
+		None => {
+			return Err(Error::BadRequest(format!(
+				"Multipart upload does not exist or has already been completed"
+			)))
+		}
 		Some(x) => x.clone(),
 	};
 	let version = match version {
@ -311,7 +344,11 @@ pub async fn handle_complete_multipart_upload(
 	// TODO: check that all the parts that they pretend they gave us are indeed there
 	// TODO: check MD5 sum of all uploaded parts? but that would mean we have to store them somewhere...

-	let total_size = version.blocks().iter().map(|x| x.size).fold(0, |x, y| x+y);
+	let total_size = version
+		.blocks()
+		.iter()
+		.map(|x| x.size)
+		.fold(0, |x, y| x + y);
 	object_version.size = total_size;
 	object_version.state = ObjectVersionState::Complete;
 	object_version.data = ObjectVersionData::FirstBlock(version.blocks()[0].hash);
@ -325,7 +362,12 @@ pub async fn handle_complete_multipart_upload(
 		r#"<CompleteMultipartUploadResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">"#
 	)
 	.unwrap();
-	writeln!(&mut xml, "\t<Location>{}</Location>", garage.config.s3_api.s3_region).unwrap();
+	writeln!(
+		&mut xml,
+		"\t<Location>{}</Location>",
+		garage.config.s3_api.s3_region
+	)
+	.unwrap();
 	writeln!(&mut xml, "\t<Bucket>{}</Bucket>", bucket).unwrap();
 	writeln!(&mut xml, "\t<Key>{}</Key>", xml_escape(&key)).unwrap();
 	writeln!(&mut xml, "</CompleteMultipartUploadResult>").unwrap();
@ -339,9 +381,13 @@ pub async fn handle_abort_multipart_upload(
 	key: &str,
 	upload_id: &str,
 ) -> Result<Response<BodyType>, Error> {
-	let version_uuid = uuid_from_str(upload_id).map_err(|_| Error::BadRequest(format!("Invalid upload ID")))?;
+	let version_uuid =
+		uuid_from_str(upload_id).map_err(|_| Error::BadRequest(format!("Invalid upload ID")))?;

-	let object = garage.object_table.get(&bucket.to_string(), &key.to_string()).await?;
+	let object = garage
+		.object_table
+		.get(&bucket.to_string(), &key.to_string())
+		.await?;
 	let object = match object {
 		None => return Err(Error::BadRequest(format!("Object not found"))),
 		Some(x) => x,
@ -352,9 +398,11 @@ pub async fn handle_abort_multipart_upload(
 			&& v.data == ObjectVersionData::Uploading
 	});
 	let mut object_version = match object_version {
-		None => return Err(Error::BadRequest(format!(
-			"Multipart upload does not exist or has already been completed"
-		))),
+		None => {
+			return Err(Error::BadRequest(format!(
+				"Multipart upload does not exist or has already been completed"
+			)))
+		}
 		Some(x) => x.clone(),
 	};

@ -383,50 +431,3 @@ fn uuid_from_str(id: &str) -> Result<UUID, ()> {
 	uuid.copy_from_slice(&id_bin[..]);
 	Ok(UUID::from(uuid))
 }
-
-pub async fn handle_delete(garage: Arc<Garage>, bucket: &str, key: &str) -> Result<UUID, Error> {
-	let object = match garage
-		.object_table
-		.get(&bucket.to_string(), &key.to_string())
-		.await?
-	{
-		None => {
-			// No need to delete
-			return Ok([0u8; 32].into());
-		}
-		Some(o) => o,
-	};
-
-	let interesting_versions = object.versions().iter().filter(|v| {
-		v.data != ObjectVersionData::DeleteMarker && v.state != ObjectVersionState::Aborted
-	});
-
-	let mut must_delete = false;
-	let mut timestamp = now_msec();
-	for v in interesting_versions {
-		must_delete = true;
-		timestamp = std::cmp::max(timestamp, v.timestamp + 1);
-	}
-
-	if !must_delete {
-		return Ok([0u8; 32].into());
-	}
-
-	let version_uuid = gen_uuid();
-
-	let object = Object::new(
-		bucket.into(),
-		key.into(),
-		vec![ObjectVersion {
-			uuid: version_uuid,
-			timestamp: now_msec(),
-			mime_type: "application/x-delete-marker".into(),
-			size: 0,
-			state: ObjectVersionState::Complete,
-			data: ObjectVersionData::DeleteMarker,
-		}],
-	);
-
-	garage.object_table.insert(&object).await?;
-	return Ok(version_uuid);
-}
--- a/src/api/signature.rs
+++ b/src/api/signature.rs
@ -11,6 +11,8 @@ use garage_util::error::Error;
 use garage_core::garage::Garage;
 use garage_core::key_table::*;

+use crate::encoding::uri_encode;
+
 const SHORT_DATE: &str = "%Y%m%d";
 const LONG_DATETIME: &str = "%Y%m%dT%H%M%SZ";

@ -284,24 +286,3 @@ fn canonical_query_string(uri: &hyper::Uri) -> String {
 		"".to_string()
 	}
 }
-
-fn uri_encode(string: &str, encode_slash: bool) -> String {
-	let mut result = String::with_capacity(string.len() * 2);
-	for c in string.chars() {
-		match c {
-			'a'..='z' | 'A'..='Z' | '0'..='9' | '_' | '-' | '~' | '.' => result.push(c),
-			'/' if encode_slash => result.push_str("%2F"),
-			'/' if !encode_slash => result.push('/'),
-			_ => {
-				result.push('%');
-				result.push_str(
-					&format!("{}", c)
-						.bytes()
-						.map(|b| format!("{:02X}", b))
-						.collect::<String>(),
-				);
-			}
-		}
-	}
-	result
-}
--- a/src/core/version_table.rs
+++ b/src/core/version_table.rs
@ -49,7 +49,10 @@ impl Version {
 	}
 	/// Adds a block if it wasn't already present
 	pub fn add_block(&mut self, new: VersionBlock) -> Result<(), ()> {
-		match self.blocks.binary_search_by(|b| b.cmp_key().cmp(&new.cmp_key())) {
+		match self
+			.blocks
+			.binary_search_by(|b| b.cmp_key().cmp(&new.cmp_key()))
+		{
 			Err(i) => {
 				self.blocks.insert(i, new);
 				Ok(())
@ -90,7 +93,10 @@ impl Entry<Hash, EmptyKey> for Version {
 			self.blocks.clear();
 		} else if !self.deleted {
 			for bi in other.blocks.iter() {
-				match self.blocks.binary_search_by(|x| x.cmp_key().cmp(&bi.cmp_key())) {
+				match self
+					.blocks
+					.binary_search_by(|x| x.cmp_key().cmp(&bi.cmp_key()))
+				{
 					Ok(_) => (),
 					Err(pos) => {
 						self.blocks.insert(pos, bi.clone());