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-rw-r--r--third_party/rust/httpdate/src/date.rs420
-rw-r--r--third_party/rust/httpdate/src/lib.rs160
2 files changed, 580 insertions, 0 deletions
diff --git a/third_party/rust/httpdate/src/date.rs b/third_party/rust/httpdate/src/date.rs
new file mode 100644
index 0000000000..9f780b65ce
--- /dev/null
+++ b/third_party/rust/httpdate/src/date.rs
@@ -0,0 +1,420 @@
+use std::cmp;
+use std::fmt::{self, Display, Formatter};
+use std::str::FromStr;
+use std::time::{Duration, SystemTime, UNIX_EPOCH};
+
+use crate::Error;
+
+/// HTTP timestamp type.
+///
+/// Parse using `FromStr` impl.
+/// Format using the `Display` trait.
+/// Convert timestamp into/from `SytemTime` to use.
+/// Supports comparsion and sorting.
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub struct HttpDate {
+ /// 0...59
+ sec: u8,
+ /// 0...59
+ min: u8,
+ /// 0...23
+ hour: u8,
+ /// 1...31
+ day: u8,
+ /// 1...12
+ mon: u8,
+ /// 1970...9999
+ year: u16,
+ /// 1...7
+ wday: u8,
+}
+
+impl HttpDate {
+ fn is_valid(&self) -> bool {
+ self.sec < 60
+ && self.min < 60
+ && self.hour < 24
+ && self.day > 0
+ && self.day < 32
+ && self.mon > 0
+ && self.mon <= 12
+ && self.year >= 1970
+ && self.year <= 9999
+ && &HttpDate::from(SystemTime::from(*self)) == self
+ }
+}
+
+impl From<SystemTime> for HttpDate {
+ fn from(v: SystemTime) -> HttpDate {
+ let dur = v
+ .duration_since(UNIX_EPOCH)
+ .expect("all times should be after the epoch");
+ let secs_since_epoch = dur.as_secs();
+
+ if secs_since_epoch >= 253402300800 {
+ // year 9999
+ panic!("date must be before year 9999");
+ }
+
+ /* 2000-03-01 (mod 400 year, immediately after feb29 */
+ const LEAPOCH: i64 = 11017;
+ const DAYS_PER_400Y: i64 = 365 * 400 + 97;
+ const DAYS_PER_100Y: i64 = 365 * 100 + 24;
+ const DAYS_PER_4Y: i64 = 365 * 4 + 1;
+
+ let days = (secs_since_epoch / 86400) as i64 - LEAPOCH;
+ let secs_of_day = secs_since_epoch % 86400;
+
+ let mut qc_cycles = days / DAYS_PER_400Y;
+ let mut remdays = days % DAYS_PER_400Y;
+
+ if remdays < 0 {
+ remdays += DAYS_PER_400Y;
+ qc_cycles -= 1;
+ }
+
+ let mut c_cycles = remdays / DAYS_PER_100Y;
+ if c_cycles == 4 {
+ c_cycles -= 1;
+ }
+ remdays -= c_cycles * DAYS_PER_100Y;
+
+ let mut q_cycles = remdays / DAYS_PER_4Y;
+ if q_cycles == 25 {
+ q_cycles -= 1;
+ }
+ remdays -= q_cycles * DAYS_PER_4Y;
+
+ let mut remyears = remdays / 365;
+ if remyears == 4 {
+ remyears -= 1;
+ }
+ remdays -= remyears * 365;
+
+ let mut year = 2000 + remyears + 4 * q_cycles + 100 * c_cycles + 400 * qc_cycles;
+
+ let months = [31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 31, 29];
+ let mut mon = 0;
+ for mon_len in months.iter() {
+ mon += 1;
+ if remdays < *mon_len {
+ break;
+ }
+ remdays -= *mon_len;
+ }
+ let mday = remdays + 1;
+ let mon = if mon + 2 > 12 {
+ year += 1;
+ mon - 10
+ } else {
+ mon + 2
+ };
+
+ let mut wday = (3 + days) % 7;
+ if wday <= 0 {
+ wday += 7
+ };
+
+ HttpDate {
+ sec: (secs_of_day % 60) as u8,
+ min: ((secs_of_day % 3600) / 60) as u8,
+ hour: (secs_of_day / 3600) as u8,
+ day: mday as u8,
+ mon: mon as u8,
+ year: year as u16,
+ wday: wday as u8,
+ }
+ }
+}
+
+impl From<HttpDate> for SystemTime {
+ fn from(v: HttpDate) -> SystemTime {
+ let leap_years =
+ ((v.year - 1) - 1968) / 4 - ((v.year - 1) - 1900) / 100 + ((v.year - 1) - 1600) / 400;
+ let mut ydays = match v.mon {
+ 1 => 0,
+ 2 => 31,
+ 3 => 59,
+ 4 => 90,
+ 5 => 120,
+ 6 => 151,
+ 7 => 181,
+ 8 => 212,
+ 9 => 243,
+ 10 => 273,
+ 11 => 304,
+ 12 => 334,
+ _ => unreachable!(),
+ } + v.day as u64
+ - 1;
+ if is_leap_year(v.year) && v.mon > 2 {
+ ydays += 1;
+ }
+ let days = (v.year as u64 - 1970) * 365 + leap_years as u64 + ydays;
+ UNIX_EPOCH
+ + Duration::from_secs(
+ v.sec as u64 + v.min as u64 * 60 + v.hour as u64 * 3600 + days * 86400,
+ )
+ }
+}
+
+impl FromStr for HttpDate {
+ type Err = Error;
+
+ fn from_str(s: &str) -> Result<HttpDate, Error> {
+ if !s.is_ascii() {
+ return Err(Error(()));
+ }
+ let x = s.trim().as_bytes();
+ let date = parse_imf_fixdate(x)
+ .or_else(|_| parse_rfc850_date(x))
+ .or_else(|_| parse_asctime(x))?;
+ if !date.is_valid() {
+ return Err(Error(()));
+ }
+ Ok(date)
+ }
+}
+
+impl Display for HttpDate {
+ fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+ let wday = match self.wday {
+ 1 => b"Mon",
+ 2 => b"Tue",
+ 3 => b"Wed",
+ 4 => b"Thu",
+ 5 => b"Fri",
+ 6 => b"Sat",
+ 7 => b"Sun",
+ _ => unreachable!(),
+ };
+
+ let mon = match self.mon {
+ 1 => b"Jan",
+ 2 => b"Feb",
+ 3 => b"Mar",
+ 4 => b"Apr",
+ 5 => b"May",
+ 6 => b"Jun",
+ 7 => b"Jul",
+ 8 => b"Aug",
+ 9 => b"Sep",
+ 10 => b"Oct",
+ 11 => b"Nov",
+ 12 => b"Dec",
+ _ => unreachable!(),
+ };
+
+ let mut buf: [u8; 29] = *b" , 00 0000 00:00:00 GMT";
+ buf[0] = wday[0];
+ buf[1] = wday[1];
+ buf[2] = wday[2];
+ buf[5] = b'0' + (self.day / 10) as u8;
+ buf[6] = b'0' + (self.day % 10) as u8;
+ buf[8] = mon[0];
+ buf[9] = mon[1];
+ buf[10] = mon[2];
+ buf[12] = b'0' + (self.year / 1000) as u8;
+ buf[13] = b'0' + (self.year / 100 % 10) as u8;
+ buf[14] = b'0' + (self.year / 10 % 10) as u8;
+ buf[15] = b'0' + (self.year % 10) as u8;
+ buf[17] = b'0' + (self.hour / 10) as u8;
+ buf[18] = b'0' + (self.hour % 10) as u8;
+ buf[20] = b'0' + (self.min / 10) as u8;
+ buf[21] = b'0' + (self.min % 10) as u8;
+ buf[23] = b'0' + (self.sec / 10) as u8;
+ buf[24] = b'0' + (self.sec % 10) as u8;
+ f.write_str(std::str::from_utf8(&buf[..]).unwrap())
+ }
+}
+
+impl Ord for HttpDate {
+ fn cmp(&self, other: &HttpDate) -> cmp::Ordering {
+ SystemTime::from(*self).cmp(&SystemTime::from(*other))
+ }
+}
+
+impl PartialOrd for HttpDate {
+ fn partial_cmp(&self, other: &HttpDate) -> Option<cmp::Ordering> {
+ Some(self.cmp(other))
+ }
+}
+
+fn toint_1(x: u8) -> Result<u8, Error> {
+ let result = x.wrapping_sub(b'0');
+ if result < 10 {
+ Ok(result)
+ } else {
+ Err(Error(()))
+ }
+}
+
+fn toint_2(s: &[u8]) -> Result<u8, Error> {
+ let high = s[0].wrapping_sub(b'0');
+ let low = s[1].wrapping_sub(b'0');
+
+ if high < 10 && low < 10 {
+ Ok(high * 10 + low)
+ } else {
+ Err(Error(()))
+ }
+}
+
+#[allow(clippy::many_single_char_names)]
+fn toint_4(s: &[u8]) -> Result<u16, Error> {
+ let a = u16::from(s[0].wrapping_sub(b'0'));
+ let b = u16::from(s[1].wrapping_sub(b'0'));
+ let c = u16::from(s[2].wrapping_sub(b'0'));
+ let d = u16::from(s[3].wrapping_sub(b'0'));
+
+ if a < 10 && b < 10 && c < 10 && d < 10 {
+ Ok(a * 1000 + b * 100 + c * 10 + d)
+ } else {
+ Err(Error(()))
+ }
+}
+
+fn parse_imf_fixdate(s: &[u8]) -> Result<HttpDate, Error> {
+ // Example: `Sun, 06 Nov 1994 08:49:37 GMT`
+ if s.len() != 29 || &s[25..] != b" GMT" || s[16] != b' ' || s[19] != b':' || s[22] != b':' {
+ return Err(Error(()));
+ }
+ Ok(HttpDate {
+ sec: toint_2(&s[23..25])?,
+ min: toint_2(&s[20..22])?,
+ hour: toint_2(&s[17..19])?,
+ day: toint_2(&s[5..7])?,
+ mon: match &s[7..12] {
+ b" Jan " => 1,
+ b" Feb " => 2,
+ b" Mar " => 3,
+ b" Apr " => 4,
+ b" May " => 5,
+ b" Jun " => 6,
+ b" Jul " => 7,
+ b" Aug " => 8,
+ b" Sep " => 9,
+ b" Oct " => 10,
+ b" Nov " => 11,
+ b" Dec " => 12,
+ _ => return Err(Error(())),
+ },
+ year: toint_4(&s[12..16])?,
+ wday: match &s[..5] {
+ b"Mon, " => 1,
+ b"Tue, " => 2,
+ b"Wed, " => 3,
+ b"Thu, " => 4,
+ b"Fri, " => 5,
+ b"Sat, " => 6,
+ b"Sun, " => 7,
+ _ => return Err(Error(())),
+ },
+ })
+}
+
+fn parse_rfc850_date(s: &[u8]) -> Result<HttpDate, Error> {
+ // Example: `Sunday, 06-Nov-94 08:49:37 GMT`
+ if s.len() < 23 {
+ return Err(Error(()));
+ }
+
+ fn wday<'a>(s: &'a [u8], wday: u8, name: &'static [u8]) -> Option<(u8, &'a [u8])> {
+ if &s[0..name.len()] == name {
+ return Some((wday, &s[name.len()..]));
+ }
+ None
+ }
+ let (wday, s) = wday(s, 1, b"Monday, ")
+ .or_else(|| wday(s, 2, b"Tuesday, "))
+ .or_else(|| wday(s, 3, b"Wednesday, "))
+ .or_else(|| wday(s, 4, b"Thursday, "))
+ .or_else(|| wday(s, 5, b"Friday, "))
+ .or_else(|| wday(s, 6, b"Saturday, "))
+ .or_else(|| wday(s, 7, b"Sunday, "))
+ .ok_or(Error(()))?;
+ if s.len() != 22 || s[12] != b':' || s[15] != b':' || &s[18..22] != b" GMT" {
+ return Err(Error(()));
+ }
+ let mut year = u16::from(toint_2(&s[7..9])?);
+ if year < 70 {
+ year += 2000;
+ } else {
+ year += 1900;
+ }
+ Ok(HttpDate {
+ sec: toint_2(&s[16..18])?,
+ min: toint_2(&s[13..15])?,
+ hour: toint_2(&s[10..12])?,
+ day: toint_2(&s[0..2])?,
+ mon: match &s[2..7] {
+ b"-Jan-" => 1,
+ b"-Feb-" => 2,
+ b"-Mar-" => 3,
+ b"-Apr-" => 4,
+ b"-May-" => 5,
+ b"-Jun-" => 6,
+ b"-Jul-" => 7,
+ b"-Aug-" => 8,
+ b"-Sep-" => 9,
+ b"-Oct-" => 10,
+ b"-Nov-" => 11,
+ b"-Dec-" => 12,
+ _ => return Err(Error(())),
+ },
+ year,
+ wday,
+ })
+}
+
+fn parse_asctime(s: &[u8]) -> Result<HttpDate, Error> {
+ // Example: `Sun Nov 6 08:49:37 1994`
+ if s.len() != 24 || s[10] != b' ' || s[13] != b':' || s[16] != b':' || s[19] != b' ' {
+ return Err(Error(()));
+ }
+ Ok(HttpDate {
+ sec: toint_2(&s[17..19])?,
+ min: toint_2(&s[14..16])?,
+ hour: toint_2(&s[11..13])?,
+ day: {
+ let x = &s[8..10];
+ {
+ if x[0] == b' ' {
+ toint_1(x[1])
+ } else {
+ toint_2(x)
+ }
+ }?
+ },
+ mon: match &s[4..8] {
+ b"Jan " => 1,
+ b"Feb " => 2,
+ b"Mar " => 3,
+ b"Apr " => 4,
+ b"May " => 5,
+ b"Jun " => 6,
+ b"Jul " => 7,
+ b"Aug " => 8,
+ b"Sep " => 9,
+ b"Oct " => 10,
+ b"Nov " => 11,
+ b"Dec " => 12,
+ _ => return Err(Error(())),
+ },
+ year: toint_4(&s[20..24])?,
+ wday: match &s[0..4] {
+ b"Mon " => 1,
+ b"Tue " => 2,
+ b"Wed " => 3,
+ b"Thu " => 4,
+ b"Fri " => 5,
+ b"Sat " => 6,
+ b"Sun " => 7,
+ _ => return Err(Error(())),
+ },
+ })
+}
+
+fn is_leap_year(y: u16) -> bool {
+ y % 4 == 0 && (y % 100 != 0 || y % 400 == 0)
+}
diff --git a/third_party/rust/httpdate/src/lib.rs b/third_party/rust/httpdate/src/lib.rs
new file mode 100644
index 0000000000..32603d6301
--- /dev/null
+++ b/third_party/rust/httpdate/src/lib.rs
@@ -0,0 +1,160 @@
+//! Date and time utils for HTTP.
+//!
+//! Multiple HTTP header fields store timestamps.
+//! For example a response created on May 15, 2015 may contain the header
+//! `Date: Fri, 15 May 2015 15:34:21 GMT`. Since the timestamp does not
+//! contain any timezone or leap second information it is equvivalent to
+//! writing 1431696861 Unix time. Rust’s `SystemTime` is used to store
+//! these timestamps.
+//!
+//! This crate provides two public functions:
+//!
+//! * `parse_http_date` to parse a HTTP datetime string to a system time
+//! * `fmt_http_date` to format a system time to a IMF-fixdate
+//!
+//! In addition it exposes the `HttpDate` type that can be used to parse
+//! and format timestamps. Convert a sytem time to `HttpDate` and vice versa.
+//! The `HttpType` (8 bytes) is smaller than `SystemTime` (16 bytes) and
+//! using the display impl avoids a temporary allocation.
+#![forbid(unsafe_code)]
+
+use std::error;
+use std::fmt::{self, Display, Formatter};
+use std::io;
+use std::time::SystemTime;
+
+pub use date::HttpDate;
+
+mod date;
+
+/// An opaque error type for all parsing errors.
+#[derive(Debug)]
+pub struct Error(());
+
+impl error::Error for Error {}
+
+impl Display for Error {
+ fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
+ f.write_str("string contains no or an invalid date")
+ }
+}
+
+impl From<Error> for io::Error {
+ fn from(e: Error) -> io::Error {
+ io::Error::new(io::ErrorKind::Other, e)
+ }
+}
+
+/// Parse a date from an HTTP header field.
+///
+/// Supports the preferred IMF-fixdate and the legacy RFC 805 and
+/// ascdate formats. Two digit years are mapped to dates between
+/// 1970 and 2069.
+pub fn parse_http_date(s: &str) -> Result<SystemTime, Error> {
+ s.parse::<HttpDate>().map(|d| d.into())
+}
+
+/// Format a date to be used in a HTTP header field.
+///
+/// Dates are formatted as IMF-fixdate: `Fri, 15 May 2015 15:34:21 GMT`.
+pub fn fmt_http_date(d: SystemTime) -> String {
+ format!("{}", HttpDate::from(d))
+}
+
+#[cfg(test)]
+mod tests {
+ use std::str;
+ use std::time::{Duration, UNIX_EPOCH};
+
+ use super::{fmt_http_date, parse_http_date, HttpDate};
+
+ #[test]
+ fn test_rfc_example() {
+ let d = UNIX_EPOCH + Duration::from_secs(784111777);
+ assert_eq!(
+ d,
+ parse_http_date("Sun, 06 Nov 1994 08:49:37 GMT").expect("#1")
+ );
+ assert_eq!(
+ d,
+ parse_http_date("Sunday, 06-Nov-94 08:49:37 GMT").expect("#2")
+ );
+ assert_eq!(d, parse_http_date("Sun Nov 6 08:49:37 1994").expect("#3"));
+ }
+
+ #[test]
+ fn test2() {
+ let d = UNIX_EPOCH + Duration::from_secs(1475419451);
+ assert_eq!(
+ d,
+ parse_http_date("Sun, 02 Oct 2016 14:44:11 GMT").expect("#1")
+ );
+ assert!(parse_http_date("Sun Nov 10 08:00:00 1000").is_err());
+ assert!(parse_http_date("Sun Nov 10 08*00:00 2000").is_err());
+ assert!(parse_http_date("Sunday, 06-Nov-94 08+49:37 GMT").is_err());
+ }
+
+ #[test]
+ fn test3() {
+ let mut d = UNIX_EPOCH;
+ assert_eq!(d, parse_http_date("Thu, 01 Jan 1970 00:00:00 GMT").unwrap());
+ d += Duration::from_secs(3600);
+ assert_eq!(d, parse_http_date("Thu, 01 Jan 1970 01:00:00 GMT").unwrap());
+ d += Duration::from_secs(86400);
+ assert_eq!(d, parse_http_date("Fri, 02 Jan 1970 01:00:00 GMT").unwrap());
+ d += Duration::from_secs(2592000);
+ assert_eq!(d, parse_http_date("Sun, 01 Feb 1970 01:00:00 GMT").unwrap());
+ d += Duration::from_secs(2592000);
+ assert_eq!(d, parse_http_date("Tue, 03 Mar 1970 01:00:00 GMT").unwrap());
+ d += Duration::from_secs(31536005);
+ assert_eq!(d, parse_http_date("Wed, 03 Mar 1971 01:00:05 GMT").unwrap());
+ d += Duration::from_secs(15552000);
+ assert_eq!(d, parse_http_date("Mon, 30 Aug 1971 01:00:05 GMT").unwrap());
+ d += Duration::from_secs(6048000);
+ assert_eq!(d, parse_http_date("Mon, 08 Nov 1971 01:00:05 GMT").unwrap());
+ d += Duration::from_secs(864000000);
+ assert_eq!(d, parse_http_date("Fri, 26 Mar 1999 01:00:05 GMT").unwrap());
+ }
+
+ #[test]
+ fn test_fmt() {
+ let d = UNIX_EPOCH;
+ assert_eq!(fmt_http_date(d), "Thu, 01 Jan 1970 00:00:00 GMT");
+ let d = UNIX_EPOCH + Duration::from_secs(1475419451);
+ assert_eq!(fmt_http_date(d), "Sun, 02 Oct 2016 14:44:11 GMT");
+ }
+
+ #[allow(dead_code)]
+ fn testcase(data: &[u8]) {
+ if let Ok(s) = str::from_utf8(data) {
+ println!("{:?}", s);
+ if let Ok(d) = parse_http_date(s) {
+ let o = fmt_http_date(d);
+ assert!(!o.is_empty());
+ }
+ }
+ }
+
+ #[test]
+ fn size_of() {
+ assert_eq!(::std::mem::size_of::<HttpDate>(), 8);
+ }
+
+ #[test]
+ fn test_date_comparison() {
+ let a = UNIX_EPOCH + Duration::from_secs(784111777);
+ let b = a + Duration::from_secs(30);
+ assert!(a < b);
+ let a_date: HttpDate = a.into();
+ let b_date: HttpDate = b.into();
+ assert!(a_date < b_date);
+ assert_eq!(a_date.cmp(&b_date), ::std::cmp::Ordering::Less)
+ }
+
+ #[test]
+ fn test_parse_bad_date() {
+ // 1994-11-07 is actually a Monday
+ let parsed = "Sun, 07 Nov 1994 08:48:37 GMT".parse::<HttpDate>();
+ assert!(parsed.is_err())
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 16:55:46 +0000