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use crate::http::Error;
use reqwest::header::{CONTENT_LENGTH, CONTENT_RANGE};
use reqwest::{Body, Client, Response};
#[derive(thiserror::Error, Debug)]
pub enum ChunkError {
#[error("invalid range: first={0} last={1}")]
InvalidRange(usize, usize),
#[error("total object size must not be zero")]
ZeroTotalObjectSize,
#[error("last byte must be less than total object size: last={0} total={1}")]
InvalidLastBytes(usize, usize),
}
#[derive(PartialEq, Debug)]
pub enum UploadStatus {
Ok,
ResumeIncomplete,
}
#[derive(Clone, Debug)]
pub enum TotalSize {
Unknown,
Known(usize),
}
impl ToString for TotalSize {
fn to_string(&self) -> String {
match self {
TotalSize::Unknown => "*".to_string(),
TotalSize::Known(size) => size.to_string(),
}
}
}
#[derive(Clone, Debug)]
pub struct ChunkSize {
first_byte: usize,
last_byte: usize,
total_object_size: TotalSize,
}
impl ToString for ChunkSize {
fn to_string(&self) -> String {
format!(
"bytes {}-{}/{}",
self.first_byte,
self.last_byte,
self.total_object_size.to_string()
)
}
}
impl ChunkSize {
pub fn new(first_byte: usize, last_byte: usize, total_object_size: TotalSize) -> Result<Self, ChunkError> {
if first_byte >= last_byte {
return Err(ChunkError::InvalidRange(first_byte, last_byte));
}
if let TotalSize::Known(total_size) = total_object_size {
if total_size == 0 {
return Err(ChunkError::ZeroTotalObjectSize);
}
if last_byte >= total_size {
return Err(ChunkError::InvalidLastBytes(last_byte, total_size));
}
let chunk_size = last_byte - first_byte + 1;
if chunk_size % (256 * 1024) != 0 && total_size > last_byte + 1 {
tracing::warn!("The chunk size should be multiple of 256KiB, unless it's the last chunk that completes the upload. size = {}", chunk_size);
}
}
Ok(Self {
first_byte,
last_byte,
total_object_size,
})
}
pub fn size(&self) -> usize {
self.last_byte - self.first_byte + 1
}
}
#[derive(Clone)]
pub struct ResumableUploadClient {
session_url: String,
http: Client,
}
impl ResumableUploadClient {
pub fn url(&self) -> &str {
self.session_url.as_str()
}
pub fn new(session_url: String, http: Client) -> Self {
Self { session_url, http }
}
pub async fn upload_single_chunk<T: Into<Body>>(&self, data: T, size: usize) -> Result<(), Error> {
let response = self
.http
.put(&self.session_url)
.header(CONTENT_LENGTH, size)
.body(data)
.send()
.await?;
if response.status().is_success() {
Ok(())
} else {
Err(Error::from_response(response).await)
}
}
pub async fn upload_multiple_chunk<T: Into<Body>>(&self, data: T, size: &ChunkSize) -> Result<UploadStatus, Error> {
let response = self
.http
.put(&self.session_url)
.header(CONTENT_RANGE, size.to_string())
.header(CONTENT_LENGTH, size.size())
.body(data)
.send()
.await?;
Self::map_resume_response(response).await
}
pub async fn status(&self, object_size: &TotalSize) -> Result<UploadStatus, Error> {
let response = self
.http
.put(&self.session_url)
.header(CONTENT_LENGTH, 0)
.header(CONTENT_RANGE, format! {"bytes */{}", object_size.to_string()})
.send()
.await?;
Self::map_resume_response(response).await
}
pub async fn cancel(self) -> Result<(), Error> {
let response = self
.http
.delete(&self.session_url)
.header(CONTENT_LENGTH, 0)
.send()
.await?;
if response.status() == 499 {
Ok(())
} else {
Err(Error::from_response(response).await)
}
}
async fn map_resume_response(response: Response) -> Result<UploadStatus, Error> {
if response.status().is_success() {
Ok(UploadStatus::Ok)
} else if response.status() == 308 {
Ok(UploadStatus::ResumeIncomplete)
} else {
Err(Error::from_response(response).await)
}
}
}