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use std::fmt;
use reqwest::header::{CONTENT_LENGTH, CONTENT_RANGE};
use reqwest::{Body, Client, Response};
use crate::http::{check_response_status, Error};
#[derive(thiserror::Error, Debug)]
pub enum ChunkError {
#[error("invalid range: first={0} last={1}")]
InvalidRange(u64, u64),
#[error("total object size must not be zero")]
ZeroTotalObjectSize,
#[error("last byte must be less than total object size: last={0} total={1}")]
InvalidLastBytes(u64, u64),
}
#[derive(PartialEq, Debug)]
pub enum UploadStatus {
Ok,
ResumeIncomplete,
}
#[derive(Clone, Debug)]
pub struct ChunkSize {
first_byte: u64,
last_byte: u64,
total_object_size: Option<u64>,
}
impl fmt::Display for ChunkSize {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
if self.first_byte == self.last_byte {
write!(f, "bytes */")?;
} else {
write!(f, "bytes {}-{}/", self.first_byte, self.last_byte)?;
}
match self.total_object_size {
Some(total_object_size) => write!(f, "{total_object_size}"),
None => write!(f, "*"),
}
}
}
impl ChunkSize {
pub fn new(first_byte: u64, last_byte: u64, total_object_size: Option<u64>) -> ChunkSize {
Self {
first_byte,
last_byte,
total_object_size,
}
}
pub fn size(&self) -> u64 {
if self.first_byte == self.last_byte {
0
} else {
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?;
check_response_status(response).await?;
Ok(())
}
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: Option<u64>) -> Result<UploadStatus, Error> {
self.upload_multiple_chunk("", &ChunkSize::new(0, 0, object_size)).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 {
check_response_status(response).await?;
Ok(())
}
}
async fn map_resume_response(response: Response) -> Result<UploadStatus, Error> {
if response.status() == 308 {
Ok(UploadStatus::ResumeIncomplete)
} else {
check_response_status(response).await?;
Ok(UploadStatus::Ok)
}
}
}