From: Christian Ebner <c.ebner@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: [pbs-devel] [PATCH proxmox v6 5/9] s3 client: add helper to parse http date headers
Date: Tue, 8 Jul 2025 19:00:33 +0200 [thread overview]
Message-ID: <20250708170114.1556057-6-c.ebner@proxmox.com> (raw)
In-Reply-To: <20250708170114.1556057-1-c.ebner@proxmox.com>
Add a helper to parse the preferred date/time format for http `Date`
headers as specified in RFC 2616 [0], which is a fixed-length subset
of the format specified in RFC 1123 [1], itself being a followup to
RFC 822 [2]. Does not implement the format as described in the
obsolete RFC 850 [3].
This allows to parse the `Date` and `Last-Modified` headers of S3 API
responses.
[0] https://datatracker.ietf.org/doc/html/rfc2616#section-3.3
[1] https://datatracker.ietf.org/doc/html/rfc1123#section-5.2.14
[2] https://datatracker.ietf.org/doc/html/rfc822#section-5
[3] https://datatracker.ietf.org/doc/html/rfc850
Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
---
proxmox-s3-client/src/timestamps.rs | 90 ++++++++++++++++++++++++++++-
1 file changed, 89 insertions(+), 1 deletion(-)
diff --git a/proxmox-s3-client/src/timestamps.rs b/proxmox-s3-client/src/timestamps.rs
index 3713b6d0..22330966 100644
--- a/proxmox-s3-client/src/timestamps.rs
+++ b/proxmox-s3-client/src/timestamps.rs
@@ -1,4 +1,9 @@
-use anyhow::{anyhow, Error};
+use anyhow::{anyhow, bail, Context, Error};
+
+const VALID_DAYS_OF_WEEK: [&str; 7] = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"];
+const VALID_MONTHS: [&str; 12] = [
+ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
+];
#[derive(Debug)]
/// Last modified timestamp as obtained from API response http headers.
@@ -16,3 +21,86 @@ impl std::str::FromStr for LastModifiedTimestamp {
}
serde_plain::derive_deserialize_from_fromstr!(LastModifiedTimestamp, "last modified timestamp");
+
+/// Preferred date format specified by RFC2616, given as fixed-length
+/// subset of RFC1123, which itself is a followup to RFC822.
+///
+/// https://datatracker.ietf.org/doc/html/rfc2616#section-3.3
+/// https://datatracker.ietf.org/doc/html/rfc1123#section-5.2.14
+/// https://datatracker.ietf.org/doc/html/rfc822#section-5
+#[derive(Debug)]
+pub struct HttpDate {
+ _epoch: i64,
+}
+
+impl std::str::FromStr for HttpDate {
+ type Err = Error;
+
+ fn from_str(timestamp: &str) -> Result<Self, Self::Err> {
+ let input = timestamp.as_bytes();
+ if input.len() != 29 {
+ bail!("unexpected length: got {}", input.len());
+ }
+
+ let expect = |pos: usize, c: u8| {
+ if input[pos] != c {
+ bail!("unexpected char at pos {pos}");
+ }
+ Ok(())
+ };
+
+ let digit = |pos: usize| -> Result<i32, Error> {
+ let digit = input[pos] as i32;
+ if !(48..=57).contains(&digit) {
+ bail!("unexpected char at pos {pos}");
+ }
+ Ok(digit - 48)
+ };
+
+ fn check_max(i: i32, max: i32) -> Result<i32, Error> {
+ if i > max {
+ bail!("value too large ({i} > {max})");
+ }
+ Ok(i)
+ }
+
+ let mut tm = proxmox_time::TmEditor::new(true);
+
+ if !VALID_DAYS_OF_WEEK
+ .iter()
+ .any(|valid| valid.as_bytes() == &input[0..3])
+ {
+ bail!("unexpected day of week, got {:?}", &input[0..3]);
+ }
+
+ expect(3, b',').context("unexpected separator after day of week")?;
+ expect(4, b' ').context("missing space after day of week separator")?;
+ tm.set_mday(check_max(digit(5)? * 10 + digit(6)?, 31)?)?;
+ expect(7, b' ').context("unexpected separator after day")?;
+ if let Some(month) = VALID_MONTHS
+ .iter()
+ .position(|month| month.as_bytes() == &input[8..11])
+ {
+ // valid conversion to i32, position stems from fixed size array of 12 months.
+ tm.set_mon(check_max(month as i32 + 1, 12)?)?;
+ } else {
+ bail!("invalid month");
+ }
+ expect(11, b' ').context("unexpected separator after month")?;
+ tm.set_year(digit(12)? * 1000 + digit(13)? * 100 + digit(14)? * 10 + digit(15)?)?;
+ expect(16, b' ').context("unexpected separator after year")?;
+ tm.set_hour(check_max(digit(17)? * 10 + digit(18)?, 23)?)?;
+ expect(19, b':').context("unexpected separator after hour")?;
+ tm.set_min(check_max(digit(20)? * 10 + digit(21)?, 59)?)?;
+ expect(22, b':').context("unexpected separator after minute")?;
+ tm.set_sec(check_max(digit(23)? * 10 + digit(24)?, 60)?)?;
+ expect(25, b' ').context("unexpected separator after second")?;
+ if !input.ends_with(b"GMT") {
+ bail!("unexpected timezone");
+ }
+
+ let _epoch = tm.into_epoch()?;
+
+ Ok(Self { _epoch })
+ }
+}
--
2.47.2
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next prev parent reply other threads:[~2025-07-08 17:01 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-08 17:00 [pbs-devel] [PATCH proxmox{, -backup} v6 00/46] fix #2943: S3 storage backend for datastores Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox v6 1/9] s3 client: add crate for AWS s3 compatible object store client Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox v6 2/9] s3 client: implement AWS signature v4 request authentication Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox v6 3/9] s3 client: add dedicated type for s3 object keys Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox v6 4/9] s3 client: add type for last modified timestamp in responses Christian Ebner
2025-07-08 17:00 ` Christian Ebner [this message]
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox v6 6/9] s3 client: implement methods to operate on s3 objects in bucket Christian Ebner
2025-07-09 10:04 ` Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox v6 7/9] s3 client: add example usage for basic operations Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox v6 8/9] pbs-api-types: extend datastore config by backend config enum Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox v6 9/9] pbs-api-types: maintenance: add new maintenance mode S3 refresh Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 01/37] datastore: add helpers for path/digest to s3 object key conversion Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 02/37] config: introduce s3 object store client configuration Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 03/37] api: config: implement endpoints to manipulate and list s3 configs Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 04/37] api: datastore: check s3 backend bucket access on datastore create Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 05/37] api/cli: add endpoint and command to check s3 client connection Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 06/37] datastore: allow to get the backend for a datastore Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 07/37] api: backup: store datastore backend in runtime environment Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 08/37] api: backup: conditionally upload chunks to s3 object store backend Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 09/37] api: backup: conditionally upload blobs " Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 10/37] api: backup: conditionally upload indices " Christian Ebner
2025-07-09 7:55 ` Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 11/37] api: backup: conditionally upload manifest " Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 12/37] sync: pull: conditionally upload content to s3 backend Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 13/37] api: reader: fetch chunks based on datastore backend Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 14/37] datastore: local chunk reader: read chunks based on backend Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 15/37] verify worker: add datastore backed to verify worker Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 16/37] verify: implement chunk verification for stores with s3 backend Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 17/37] datastore: create namespace marker in " Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 18/37] datastore: create/delete protected marker file on s3 storage backend Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 19/37] datastore: prune groups/snapshots from s3 object store backend Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 20/37] datastore: get and set owner for s3 " Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 21/37] datastore: implement garbage collection for s3 backend Christian Ebner
2025-07-10 6:59 ` Thomas Lamprecht
2025-07-10 7:36 ` Christian Ebner
2025-07-10 9:47 ` Christian Ebner
2025-07-10 11:15 ` Christian Ebner
2025-07-08 17:00 ` [pbs-devel] [PATCH proxmox-backup v6 22/37] ui: add datastore type selector and reorganize component layout Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 23/37] ui: add s3 client edit window for configuration create/edit Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 24/37] ui: add s3 client view for configuration Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 25/37] ui: expose the s3 client view in the navigation tree Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 26/37] ui: add s3 client selector and bucket field for s3 backend setup Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 27/37] tools: lru cache: add removed callback for evicted cache nodes Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 28/37] tools: async lru cache: implement insert, remove and contains methods Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 29/37] datastore: add local datastore cache for network attached storages Christian Ebner
2025-07-10 10:05 ` Thomas Lamprecht
2025-07-10 10:30 ` Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 30/37] api: backup: use local datastore cache on s3 backend chunk upload Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 31/37] api: reader: use local datastore cache on s3 backend chunk fetching Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 32/37] datastore: local chunk reader: get cached chunk from local cache store Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 33/37] api: backup: add no-cache flag to bypass local datastore cache Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 34/37] api/datastore: implement refresh endpoint for stores with s3 backend Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 35/37] cli: add dedicated subcommand for datastore s3 refresh Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 36/37] ui: render s3 refresh as valid maintenance type and task description Christian Ebner
2025-07-08 17:01 ` [pbs-devel] [PATCH proxmox-backup v6 37/37] ui: expose s3 refresh button for datastores backed by object store Christian Ebner
2025-07-10 17:09 ` [pbs-devel] superseded: [PATCH proxmox{, -backup} v6 00/46] fix #2943: S3 storage backend for datastores Christian Ebner
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