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feat: support multipart ranges (#535)

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This commit is contained in:
45gfg9
2025-02-01 08:28:34 +08:00
committed by GitHub
parent d255f1376a
commit eda9769b2a
3 changed files with 163 additions and 52 deletions
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68
src/utils.rs
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@@ -100,36 +100,42 @@ pub fn load_private_key<T: AsRef<Path>>(filename: T) -> Result<PrivateKeyDer<'st
anyhow::bail!("No supported private key in file");
}
pub fn parse_range(range: &str, size: u64) -> Option<(u64, u64)> {
let (unit, range) = range.split_once('=')?;
if unit != "bytes" || range.contains(',') {
pub fn parse_range(range: &str, size: u64) -> Option<Vec<(u64, u64)>> {
let (unit, ranges) = range.split_once('=')?;
if unit != "bytes" {
return None;
}
let (start, end) = range.split_once('-')?;
if start.is_empty() {
let offset = end.parse::<u64>().ok()?;
if offset <= size {
Some((size - offset, size - 1))
} else {
None
}
} else {
let start = start.parse::<u64>().ok()?;
if start < size {
if end.is_empty() {
Some((start, size - 1))
let mut result = Vec::new();
for range in ranges.split(',') {
let (start, end) = range.trim().split_once('-')?;
if start.is_empty() {
let offset = end.parse::<u64>().ok()?;
if offset <= size {
result.push((size - offset, size - 1));
} else {
let end = end.parse::<u64>().ok()?;
if end < size {
Some((start, end))
} else {
None
}
return None;
}
} else {
None
let start = start.parse::<u64>().ok()?;
if start < size {
if end.is_empty() {
result.push((start, size - 1));
} else {
let end = end.parse::<u64>().ok()?;
if end < size {
result.push((start, end));
} else {
return None;
}
}
} else {
return None;
}
}
}
Some(result)
}
#[cfg(test)]
@@ -162,13 +168,19 @@ mod tests {
#[test]
fn test_parse_range() {
assert_eq!(parse_range("bytes=0-499", 500), Some((0, 499)));
assert_eq!(parse_range("bytes=0-", 500), Some((0, 499)));
assert_eq!(parse_range("bytes=299-", 500), Some((299, 499)));
assert_eq!(parse_range("bytes=-500", 500), Some((0, 499)));
assert_eq!(parse_range("bytes=-300", 500), Some((200, 499)));
assert_eq!(parse_range("bytes=0-499", 500), Some(vec![(0, 499)]));
assert_eq!(parse_range("bytes=0-", 500), Some(vec![(0, 499)]));
assert_eq!(parse_range("bytes=299-", 500), Some(vec![(299, 499)]));
assert_eq!(parse_range("bytes=-500", 500), Some(vec![(0, 499)]));
assert_eq!(parse_range("bytes=-300", 500), Some(vec![(200, 499)]));
assert_eq!(
parse_range("bytes=0-199, 100-399, 400-, -200", 500),
Some(vec![(0, 199), (100, 399), (400, 499), (300, 499)])
);
assert_eq!(parse_range("bytes=500-", 500), None);
assert_eq!(parse_range("bytes=-501", 500), None);
assert_eq!(parse_range("bytes=0-500", 500), None);
assert_eq!(parse_range("bytes=0-199,", 500), None);
assert_eq!(parse_range("bytes=0-199, 500-", 500), None);
}
}