http-content-range-0.2.1/.cargo_vcs_info.json0000644000000001360000000000100145550ustar { "git": { "sha1": "f53f1e865757f53e404691b8e2af0cc093204db0" }, "path_in_vcs": "" }http-content-range-0.2.1/Cargo.toml0000644000000023770000000000100125640ustar # THIS FILE IS AUTOMATICALLY GENERATED BY CARGO # # When uploading crates to the registry Cargo will automatically # "normalize" Cargo.toml files for maximal compatibility # with all versions of Cargo and also rewrite `path` dependencies # to registry (e.g., crates.io) dependencies. # # If you are reading this file be aware that the original Cargo.toml # will likely look very different (and much more reasonable). # See Cargo.toml.orig for the original contents. [package] edition = "2021" rust-version = "1.58.1" name = "http-content-range" version = "0.2.1" authors = ["Yuri Astrakhan "] build = false exclude = [ ".gitignore", ".github/*", "justfile", ] autolib = false autobins = false autoexamples = false autotests = false autobenches = false description = "HTTP Content Range response header parser" readme = "README.md" keywords = [ "http", "headers", "content-range", ] categories = [ "network-programming", "web-programming::http-client", ] license = "MIT OR Apache-2.0" repository = "https://github.com/nyurik/http-content-range" [lib] name = "http_content_range" path = "src/lib.rs" [lints.clippy.pedantic] level = "warn" priority = -1 [lints.rust] unsafe_code = "forbid" unused_qualifications = "warn" http-content-range-0.2.1/Cargo.toml.orig000064400000000000000000000011431046102023000162330ustar 00000000000000[package] name = "http-content-range" version = "0.2.1" description = "HTTP Content Range response header parser" authors = ["Yuri Astrakhan "] repository = "https://github.com/nyurik/http-content-range" edition = "2021" license = "MIT OR Apache-2.0" keywords = ["http", "headers", "content-range"] categories = ["network-programming", "web-programming::http-client"] rust-version = "1.58.1" exclude = [ ".gitignore", ".github/*", "justfile", ] [lints.rust] unsafe_code = "forbid" unused_qualifications = "warn" [lints.clippy] pedantic = { level = "warn", priority = -1 } http-content-range-0.2.1/LICENSE-APACHE000064400000000000000000000251371046102023000153010ustar 00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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See the License for the specific language governing permissions and limitations under the License. http-content-range-0.2.1/LICENSE-MIT000064400000000000000000000020641046102023000150030ustar 00000000000000MIT License Copyright (c) 2022-2024 Yuri Astrakhan Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. 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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. http-content-range-0.2.1/README.md000064400000000000000000000044041046102023000146260ustar 00000000000000# http-content-range [![GitHub](https://img.shields.io/badge/github-nyurik/http--content--range-8da0cb?logo=github)](https://github.com/nyurik/http-content-range) [![crates.io version](https://img.shields.io/crates/v/http-content-range.svg)](https://crates.io/crates/http-content-range) [![docs.rs docs](https://docs.rs/http-content-range/badge.svg)](https://docs.rs/http-content-range) [![crates.io version](https://img.shields.io/crates/l/http-content-range.svg)](https://github.com/nyurik/http-content-range/blob/main/LICENSE-APACHE) [![CI build](https://github.com/nyurik/http-content-range/actions/workflows/ci.yml/badge.svg)](https://github.com/nyurik/http-content-range/actions) Tiny Rust lib to decode Content-Range response headers. ```rust use http_content_range::ContentRange; let value = ContentRange::parse("bytes 42-69/420"); match value.expect("Failed to parse Content-Range") { ContentRange::Bytes(r) => { println!( "First_byte={}, last_byte={}, complete_length={}", r.first_byte, r.last_byte, r.complete_length, ); } ContentRange::UnboundBytes(r) => { println!( "First_byte={}, last_byte={}, complete_length is unknown", r.first_byte, r.last_byte ); } ContentRange::Unsatisfied(r) => { println!( "Unsatisfied response, complete_length={}", r.complete_length ); } }; ``` ## Development * This project is easier to develop with [just](https://github.com/casey/just#readme), a modern alternative to `make`. Install it with `cargo install just`. * To get a list of available commands, run `just`. * To run tests, use `just test`. ## Credits The code was inspired by the [rust-http-range](https://github.com/bancek/rust-http-range) crate. ## License Licensed under either of * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or ) * MIT license ([LICENSE-MIT](LICENSE-MIT) or ) at your option. ### Contribution Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. http-content-range-0.2.1/src/lib.rs000064400000000000000000000166241046102023000152610ustar 00000000000000#![doc = include_str!("../README.md")] use std::str::FromStr; use crate::utils::{fail_if, is_whitespace, IterExt}; mod utils; const PREFIX: &[u8] = b"bytes"; /// HTTP Content-Range response header representation. #[derive(Debug, Clone, Copy, Eq, PartialEq)] pub enum ContentRange { /// Regular bytes range response with status 206 Bytes(ContentRangeBytes), /// Regular bytes range response with status 206 UnboundBytes(ContentRangeUnbound), /// Server response with status 416 Unsatisfied(ContentRangeUnsatisfied), } #[derive(Debug, Clone, Copy, Eq, PartialEq)] pub struct ContentRangeBytes { pub first_byte: u64, pub last_byte: u64, pub complete_length: u64, } #[derive(Debug, Clone, Copy, Eq, PartialEq)] pub struct ContentRangeUnbound { pub first_byte: u64, pub last_byte: u64, } #[derive(Debug, Clone, Copy, Eq, PartialEq)] pub struct ContentRangeUnsatisfied { pub complete_length: u64, } impl TryFrom<&str> for ContentRange { type Error = (); fn try_from(value: &str) -> Result { Self::parse(value).ok_or(()) } } impl TryFrom<&[u8]> for ContentRange { type Error = (); fn try_from(value: &[u8]) -> Result { Self::parse_bytes(value).ok_or(()) } } impl FromStr for ContentRange { type Err = (); fn from_str(s: &str) -> Result { Self::try_from(s) } } impl ContentRange { /// Parses Content-Range HTTP header string as per /// [RFC 7233](https://httpwg.org/specs/rfc7233.html#header.content-range). /// /// `header` is the HTTP Content-Range header (e.g. `bytes 0-9/30`). /// /// This parser is a bit more lenient than the official RFC, it allows spaces and tabs between everything. /// See /// /// ``` /// # use http_content_range::{ContentRange, ContentRangeBytes, ContentRangeUnbound, ContentRangeUnsatisfied}; /// assert_eq!(ContentRange::parse("bytes 42-69/420").unwrap(), /// ContentRange::Bytes(ContentRangeBytes{first_byte: 42, last_byte: 69, complete_length: 420})); /// /// // complete_length is unknown /// assert_eq!(ContentRange::parse("bytes 42-69/*").unwrap(), /// ContentRange::UnboundBytes(ContentRangeUnbound{first_byte: 42, last_byte: 69})); /// /// // response is unsatisfied /// assert_eq!(ContentRange::parse("bytes */420").unwrap(), /// ContentRange::Unsatisfied(ContentRangeUnsatisfied{complete_length: 420})); /// ``` #[must_use] #[inline] pub fn parse(header: &str) -> Option { Self::parse_bytes(header.as_bytes()) } /// From /// Valid bytes responses: /// Content-Range: bytes 42-1233/1234 /// Content-Range: bytes 42-1233/* /// Content-Range: bytes */1233 /// /// ```none /// Content-Range = byte-content-range /// / other-content-range /// /// byte-content-range = bytes-unit SP /// ( byte-range-resp / unsatisfied-range ) /// /// byte-range-resp = byte-range "/" ( complete-length / "*" ) /// byte-range = first-byte-pos "-" last-byte-pos /// unsatisfied-range = "*/" complete-length /// /// complete-length = 1*DIGIT /// /// other-content-range = other-range-unit SP other-range-resp /// other-range-resp = *CHAR /// ``` /// Same as [`parse`](Self::parse) but parses directly from the byte array #[must_use] pub fn parse_bytes(header: &[u8]) -> Option { if !header.starts_with(PREFIX) { return None; } let mut iter = header[PREFIX.len()..].iter().peekable(); // must start with a space fail_if(!is_whitespace(*iter.next()?))?; let res = if iter.skip_spaces()? == b'*' { // Unsatisfied range iter.next()?; // consume '*' iter.parse_separator(b'/')?; ContentRange::Unsatisfied(ContentRangeUnsatisfied { complete_length: iter.parse_u64()?, }) } else { // byte range let first_byte = iter.parse_u64()?; iter.parse_separator(b'-')?; let last_byte = iter.parse_u64()?; fail_if(first_byte > last_byte)?; if iter.parse_separator(b'/')? == b'*' { // unbound byte range, consume '*' iter.next()?; ContentRange::UnboundBytes(ContentRangeUnbound { first_byte, last_byte, }) } else { let complete_length = iter.parse_u64()?; fail_if(last_byte >= complete_length)?; ContentRange::Bytes(ContentRangeBytes { first_byte, last_byte, complete_length, }) } }; // verify there is nothing left match iter.skip_spaces() { None => Some(res), Some(_) => None, } } } #[cfg(test)] mod tests { #![allow(clippy::unnecessary_wraps)] use super::*; fn bytes(first_byte: u64, last_byte: u64, complete_length: u64) -> Option { Some(ContentRange::Bytes(ContentRangeBytes { first_byte, last_byte, complete_length, })) } fn unbound(first_byte: u64, last_byte: u64) -> Option { Some(ContentRange::UnboundBytes(ContentRangeUnbound { first_byte, last_byte, })) } fn unsatisfied(complete_length: u64) -> Option { Some(ContentRange::Unsatisfied(ContentRangeUnsatisfied { complete_length, })) } #[test] fn test_parse() { for (header, expected) in vec![ // Valid ("bytes 0-9/20", bytes(0, 9, 20)), ("bytes\t 0 \t -\t \t \t9 / 20 ", bytes(0, 9, 20)), ("bytes */20", unsatisfied(20)), ("bytes *\t\t/ 20 ", unsatisfied(20)), ("bytes 0-9/*", unbound(0, 9)), ("bytes 0 - 9 / * ", unbound(0, 9)), // // Errors // ("", None), ("b", None), ("foo", None), ("foo 1-2/3", None), (" bytes 1-2/3", None), ("bytes -2/3", None), ("bytes 1-/3", None), ("bytes 1-2/", None), ("bytes 1-2/a", None), ("bytes1-2/3", None), ("bytes=1-2/3", None), ("bytes a-2/3", None), ("bytes 1-a/3", None), ("bytes 0x01-0x02/3", None), ("bytes 1-2/a", None), ( "bytes 1111111111111111111111111111111111111111111-2/1", None, ), ("bytes 1-3/20 1", None), ("bytes 1-3/* 1", None), ("bytes */1 1", None), ("bytes 1-0/20", None), ("bytes 1-20/20", None), ("bytes 1-21/20", None), ] { assert_eq!(ContentRange::parse(header), expected); assert_eq!(ContentRange::try_from(header).ok(), expected); assert_eq!(ContentRange::from_str(header).ok(), expected); assert_eq!(ContentRange::try_from(header.as_bytes()).ok(), expected); } } } http-content-range-0.2.1/src/utils.rs000064400000000000000000000042751046102023000156520ustar 00000000000000use std::iter::Peekable; use std::slice::Iter; /// Helper method that returns None if test is true #[inline] #[must_use] pub fn fail_if(test: bool) -> Option<()> { if test { None } else { Some(()) } } #[inline] pub fn is_whitespace(c: u8) -> bool { c == b'\t' || c == b' ' } #[inline] fn into_digit(c: u8) -> u64 { u64::from(c - b'0') } pub(crate) trait IterExt { #[must_use] fn skip_spaces(&mut self) -> Option; #[must_use] fn parse_separator(&mut self, separator: u8) -> Option; #[must_use] fn parse_u64(&mut self) -> Option; } impl IterExt for Peekable> { /// Advances to the next non-blank byte, returning true if there is more data fn skip_spaces(&mut self) -> Option { loop { match self.peek() { None => return None, Some(v) => { if is_whitespace(**v) { self.next(); } else { return Some(**v); } } } } } /// Skip spaces, and ensure there is a given separator. Returns next non-space value fn parse_separator(&mut self, separator: u8) -> Option { if self.skip_spaces()? != separator { return None; } self.next()?; // consume separator self.skip_spaces() } /// Consume u64 value fn parse_u64(&mut self) -> Option { let mut res = match self.next() { None => return None, Some(v) => { let c = *v; if !c.is_ascii_digit() { return None; } into_digit(*v) } }; loop { match self.peek() { None => return Some(res), Some(v) => { let next = **v; if next.is_ascii_digit() { res = res.checked_mul(10)?.checked_add(into_digit(next))?; self.next(); } else { return Some(res); } } } } } }