osobhandClaude Opus 5.5
5062b907bd
A local port scanner's GET / reached the test listeners and was counted, failing the exact request budgets (and consuming injected 503s). Requests for paths the server does not serve are now answered 404 without being counted, delayed or failed; the query string is not part of the path. Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
547 lines
20 KiB
Rust
547 lines
20 KiB
Rust
//! HTTP range reads against a local server (no internet): every value read
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//! over HTTP equals `File::open`'s, and the server's misbehaviour — no
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//! range support, a file replaced mid-read, cut-off bodies, errors, slow
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//! answers under concurrent readers — is an error or the right data, never
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//! wrong data.
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//!
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//! `CLAWHDF5_REMOTE_CORPUS=dir[:dir...]` adds every HDF5 file under those
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//! directories (the conformance corpus is `conformance/.cache/corpus`), and
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//! `CLAWHDF5_REMOTE_REPORT=1` prints the per-file request counts.
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#![cfg(feature = "http")]
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mod common;
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use std::sync::Arc;
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use std::sync::atomic::Ordering;
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use std::time::Duration;
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use clawhdf5::File;
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use clawhdf5_remote::{
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CacheConfig, Error, HttpOptions, HttpStorage, Options, RemoteError, open_url, open_url_with,
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storage_for_url,
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};
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use common::server::Server;
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use common::{list_and_read_one, multi_block_file, transcript};
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/// Options for tests: fast retries.
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fn quick() -> Options {
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Options {
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http: HttpOptions {
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backoff: Duration::from_millis(5),
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..HttpOptions::default()
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},
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..Options::default()
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}
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}
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fn changed(e: &str) -> bool {
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e.contains("changed while open")
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}
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/// Serve `files`, open each by URL and through `File::open`, and require
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/// identical transcripts. Returns (files compared, files both refused).
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fn compare(files: &[std::path::PathBuf], report: bool) -> (usize, usize) {
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let served: Vec<(String, Vec<u8>)> = files
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.iter()
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.enumerate()
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.filter_map(|(i, p)| {
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let bytes = std::fs::read(p).ok()?;
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let name = p.file_name()?.to_str()?.replace(' ', "_");
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Some((format!("/f{i}/{name}"), bytes))
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})
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.collect();
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let server = Server::start(served.clone());
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let (mut same, mut refused) = (0, 0);
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let mut totals = [0u64; 7];
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for (i, p) in files.iter().enumerate() {
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let Some((url_path, bytes)) = served
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.iter()
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.find(|(u, _)| u.starts_with(&format!("/f{i}/")))
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else {
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continue;
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};
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let url = server.url(url_path);
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let local = File::open(p);
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let remote = storage_for_url(&url, &quick())
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.map_err(|e| e.to_string())
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.and_then(|s| {
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File::open_storage(s.clone())
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.map(|mut f| {
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f.set_vds_resolver(common::sibling_resolver(p.parent().unwrap().into()));
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(f, s)
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})
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.map_err(|e| e.to_string())
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});
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let (local, (remote, storage)) = match (local, remote) {
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(Ok(l), Ok(r)) => (l, r),
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(Err(l), Err(r)) => {
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assert!(
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!r.contains("HTTP") && !r.contains("network"),
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"{url}: {r} ({l})"
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);
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refused += 1;
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continue;
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}
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(l, r) => panic!(
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"{}: File::open {:?}, open_url {:?}",
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p.display(),
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l.map(|_| ()),
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r.map(|_| ())
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),
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};
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let want = transcript(&local);
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let got = transcript(&remote);
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if want != got {
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let first = want
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.lines()
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.zip(got.lines())
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.find(|(w, g)| w != g)
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.map(|(w, g)| format!("\n local: {w}\n remote: {g}"))
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.unwrap_or_default();
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panic!("{}: open_url differs from File::open{first}", p.display());
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}
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assert!(storage.stats().reads > 0, "read through the cache");
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same += 1;
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// Cost of "open + list" (a tree view) and of then reading the
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// largest dataset (a plot): with the block cache, and with none
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// (every read a request). Requests and bytes as the server saw
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// them, the open included.
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server.reset();
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let with = storage_for_url(&url, &quick()).unwrap();
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let f = File::open_storage(with.clone()).unwrap();
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let pick = common::list(&f);
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let (list_requests, list_bytes) = (server.requests(), server.bytes());
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if let Some((addr, _)) = pick {
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common::read_one(&f, addr);
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}
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let (cached_requests, cached_bytes) = (server.requests(), server.bytes());
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server.reset();
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let (bare, _) = HttpStorage::open(&url, quick().http).unwrap();
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if let Ok(f) = File::open_storage(Arc::new(bare)) {
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list_and_read_one(&f);
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}
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let uncached_requests = server.requests();
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for (t, v) in totals.iter_mut().zip([
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list_requests,
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list_bytes,
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cached_requests,
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cached_bytes,
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uncached_requests,
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bytes.len() as u64,
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1,
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]) {
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*t += v;
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}
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if report {
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eprintln!(
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"open+list {list_requests:>4} req {list_bytes:>10} B | +read {:>5} req \
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{cached_bytes:>10} B | uncached {uncached_requests:>7} req | file {:>10} B {}",
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cached_requests,
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bytes.len(),
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p.display()
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);
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}
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// Files within one block: opening fetched everything.
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if bytes.len() as u64 <= with.config().block_size {
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assert_eq!(cached_requests, 1, "{}", p.display());
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}
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// The budget of docs/design/range-reads.md (Testing): listing the
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// IMERG file (file A of section 2) takes at most 3 requests.
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if p.ends_with("xarray-data/imerghh_730.hdf5") {
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assert!(list_requests <= 3, "{}: {list_requests}", p.display());
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}
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}
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eprintln!(
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"{} files ({} bytes): open + list {} requests, {} bytes; + read the largest \
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dataset {} requests, {} bytes (1 MiB block cache); without a cache {} requests",
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totals[6], totals[5], totals[0], totals[1], totals[2], totals[3], totals[4]
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);
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(same, refused)
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}
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#[test]
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fn fixtures_read_identically_over_http() {
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let files = common::fixtures();
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assert!(files.len() >= 45, "{} fixtures", files.len());
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let report = std::env::var("CLAWHDF5_REMOTE_REPORT").is_ok_and(|v| v == "1");
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let (same, _) = compare(&files, report);
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assert!(same >= 40, "{same}");
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}
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#[test]
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fn corpus_reads_identically_over_http() {
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let Some(files) = common::corpus() else {
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eprintln!("CLAWHDF5_REMOTE_CORPUS not set; skipping the corpus");
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return;
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};
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let report = std::env::var("CLAWHDF5_REMOTE_REPORT").is_ok_and(|v| v == "1");
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let (same, refused) = compare(&files, report);
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eprintln!("corpus: {same} files identical, {refused} refused by both");
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assert!(same > 0);
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}
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#[test]
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fn multi_block_file_values_and_request_budget() {
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let bytes = multi_block_file();
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assert!(bytes.len() > 3 << 20, "{}", bytes.len());
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let server = Server::start(vec![("/m.h5".into(), bytes.clone())]);
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let url = server.url("/m.h5");
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let local = File::from_bytes(bytes.clone()).unwrap();
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let storage = storage_for_url(&url, &quick()).unwrap();
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assert_eq!(server.requests(), 1, "opening is one request");
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let remote = File::open_storage(storage.clone()).unwrap();
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assert!(remote.contiguous_bytes().is_none());
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let mut names = remote.root().datasets().unwrap();
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names.sort();
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assert_eq!(names, ["big", "flat"]);
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assert_eq!(remote.root().groups().unwrap(), ["grp"]);
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assert_eq!(
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remote.dataset("grp/small").unwrap().read_f64().unwrap(),
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[1.0, 2.0, 3.0]
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);
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let big = remote.dataset("big").unwrap().read_f64().unwrap();
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assert_eq!(big, local.dataset("big").unwrap().read_f64().unwrap());
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let flat = remote.dataset("flat").unwrap().read_f64().unwrap();
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assert_eq!(flat.len(), 300_000);
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assert_eq!(flat[299_999], 299_999.0);
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// Every byte was fetched at most once, in whole 1 MiB blocks.
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let log = server.log();
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let mut blocks: Vec<u64> = Vec::new();
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for (_, r) in &log {
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let (a, b) = r.expect("every request is ranged");
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assert_eq!(a % (1 << 20), 0, "block-aligned");
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blocks.extend(a >> 20..=b >> 20);
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}
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let n = blocks.len();
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blocks.sort_unstable();
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blocks.dedup();
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assert_eq!(n, blocks.len(), "a block was fetched twice: {log:?}");
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assert!(
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server.requests() <= (bytes.len() as u64 >> 20) + 2,
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"{} requests for a {} byte file",
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server.requests(),
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bytes.len()
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);
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// Reading again costs nothing.
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let before = server.requests();
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assert_eq!(transcript(&remote), transcript(&local));
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assert_eq!(server.requests(), before);
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}
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#[test]
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fn h5py_written_file_over_http() {
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if !common::have_h5py() {
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return;
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}
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let dir = tempfile::tempdir().unwrap();
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let path = dir.path().join("py.h5");
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common::run_python(
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r#"
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import sys, h5py, numpy as np
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with h5py.File(sys.argv[1], "w", libver="latest") as f:
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f.attrs["title"] = "h5py remote test"
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g = f.create_group("sensors")
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for i in range(40):
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d = g.create_dataset(f"s{i:02d}", data=np.arange(1000, dtype="<i4") * (i + 1))
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d.attrs["index"] = i
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t = f.create_dataset("temps", data=np.sin(np.arange(2_000_000) / 1000.0),
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chunks=(50_000,), compression="gzip", shuffle=True)
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t.attrs["units"] = "K"
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f.create_dataset("names", data=[b"alpha", b"beta", b"gamma"])
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f.create_dataset("vl", data=["one", "two", "three"], dtype=h5py.string_dtype())
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f["link"] = h5py.SoftLink("/sensors/s03")
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"#,
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&[path.to_str().unwrap()],
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);
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// What libhdf5 reads, for the values the test checks.
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let sums = common::run_python(
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r#"
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import sys, h5py, numpy as np
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with h5py.File(sys.argv[1], "r") as f:
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print(repr(float(f["temps"][:].sum())), int(f["sensors/s39"][:].sum()), f["vl"].asstr()[1])
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"#,
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&[path.to_str().unwrap()],
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);
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let bytes = std::fs::read(&path).unwrap();
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let server = Server::start(vec![("/py.h5".into(), bytes.clone())]);
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let remote = open_url_with(&server.url("/py.h5"), &quick()).unwrap();
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let local = File::open(&path).unwrap();
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assert_eq!(transcript(&remote), transcript(&local));
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let temps = remote.dataset("temps").unwrap().read_f64().unwrap();
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let s39: i64 = remote
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.dataset("sensors/s39")
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.unwrap()
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.read_i64()
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.unwrap()
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.iter()
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.sum();
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let vl = remote.dataset("vl").unwrap().read_string().unwrap();
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let mut it = sums.split_whitespace();
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let want_sum: f64 = it.next().unwrap().parse().unwrap();
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let got_sum: f64 = temps.iter().sum();
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assert!((got_sum - want_sum).abs() <= 1e-6 * want_sum.abs().max(1.0));
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assert_eq!(s39, it.next().unwrap().parse::<i64>().unwrap());
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assert_eq!(vl[1], it.next().unwrap());
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assert_eq!(
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remote.dataset("link").unwrap().read_i32().unwrap(),
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local.dataset("sensors/s03").unwrap().read_i32().unwrap()
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);
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}
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#[test]
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fn a_server_that_ignores_range_is_refused_or_downloaded_when_allowed() {
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let bytes = multi_block_file();
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let server = Server::start(vec![("/m.h5".into(), bytes.clone())]);
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server.shared.ignore_range.store(true, Ordering::SeqCst);
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let url = server.url("/m.h5");
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let err = open_url_with(&url, &quick()).unwrap_err();
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assert!(
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matches!(err, Error::Remote(RemoteError::RangeNotSupported(_))),
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"{err}"
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);
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assert_eq!(server.requests(), 1, "refused at the first response");
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let mut opts = quick();
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opts.http.allow_full_download = true;
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let storage = storage_for_url(&url, &opts).unwrap();
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let f = File::open_storage(storage.clone()).unwrap();
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assert_eq!(f.contiguous_bytes(), Some(&bytes[..]), "read from memory");
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assert_eq!(server.requests(), 2);
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let local = File::from_bytes(bytes).unwrap();
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assert_eq!(transcript(&f), transcript(&local));
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assert_eq!(server.requests(), 2, "no further requests");
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// Too large for the download limit.
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opts.http.max_full_download = 1000;
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assert!(open_url_with(&url, &opts).is_err());
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}
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#[test]
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fn a_file_replaced_mid_read_is_an_error_not_mixed_data() {
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for mode in ["etag", "last-modified", "none"] {
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let bytes = multi_block_file();
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let server = Server::start(vec![("/m.h5".into(), bytes.clone())]);
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match mode {
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"last-modified" => server.shared.no_etag.store(true, Ordering::SeqCst),
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"none" => server.shared.no_validators.store(true, Ordering::SeqCst),
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_ => {}
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}
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let url = server.url("/m.h5");
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let f = open_url_with(&url, &quick()).unwrap();
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assert_eq!(f.root().groups().unwrap(), ["grp"], "{mode}");
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// Replace the file: same layout, other values (and, for "none",
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// one byte longer, which is all that can be checked).
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let mut other = bytes.clone();
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let n = other.len();
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for b in &mut other[n / 2..n / 2 + 1000] {
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*b ^= 0xff;
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}
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if mode == "none" {
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other.push(0);
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}
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server.shared.put("/m.h5", other);
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let err = f
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.dataset("big")
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.unwrap()
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.read_f64()
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.unwrap_err()
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.to_string();
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assert!(changed(&err), "{mode}: {err}");
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}
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}
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#[test]
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fn a_weak_etag_or_no_validator_is_refused_when_required() {
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let server = Server::start(vec![("/m.h5".into(), multi_block_file())]);
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server.shared.weak_etag.store(true, Ordering::SeqCst);
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let mut opts = quick();
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opts.http.require_validator = true;
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assert!(open_url_with(&server.url("/m.h5"), &opts).is_err());
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opts.http.require_validator = false;
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assert!(open_url_with(&server.url("/m.h5"), &opts).is_ok());
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}
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#[test]
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fn truncated_bodies_are_retried_then_an_error() {
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let bytes = multi_block_file();
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let server = Server::start(vec![("/m.h5".into(), bytes.clone())]);
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let url = server.url("/m.h5");
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let local = File::from_bytes(bytes).unwrap();
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let want = local.dataset("big").unwrap().read_f64().unwrap();
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// One cut-off body: retried, right values.
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let (http, first) = HttpStorage::open(&url, quick().http).unwrap();
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assert_eq!(first.len(), 1 << 20);
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let storage = Arc::new(clawhdf5_remote::BlockCache::new(
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http,
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CacheConfig::default(),
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));
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let f = File::open_storage(storage.clone()).unwrap();
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server.shared.truncate_next.store(1, Ordering::SeqCst);
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assert_eq!(f.dataset("big").unwrap().read_f64().unwrap(), want);
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assert_eq!(storage.inner().stats().retries, 1);
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// Every body cut off: an error, never partial data.
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let f = open_url_with(&url, &quick()).unwrap();
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server.shared.truncate_next.store(1000, Ordering::SeqCst);
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let err = f
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.dataset("big")
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.unwrap()
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.read_f64()
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.unwrap_err()
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.to_string();
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assert!(
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err.contains("network error") || err.contains("bad response"),
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"{err}"
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);
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server.shared.truncate_next.store(0, Ordering::SeqCst);
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// The failure was not cached: the next read succeeds.
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assert_eq!(f.dataset("big").unwrap().read_f64().unwrap(), want);
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}
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#[test]
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fn server_errors_are_retried_with_backoff() {
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let bytes = multi_block_file();
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let server = Server::start(vec![("/m.h5".into(), bytes.clone())]);
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server.shared.fail_next.store(2, Ordering::SeqCst);
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let url = server.url("/m.h5");
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let f = open_url_with(&url, &quick()).unwrap();
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let local = File::from_bytes(bytes).unwrap();
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server.shared.fail_next.store(3, Ordering::SeqCst);
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assert_eq!(
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f.dataset("flat").unwrap().read_f64().unwrap(),
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local.dataset("flat").unwrap().read_f64().unwrap()
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);
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// More failures than retries: an error.
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let f = open_url_with(&url, &quick()).unwrap();
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server.shared.fail_next.store(100, Ordering::SeqCst);
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let err = f
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.dataset("big")
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.unwrap()
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.read_f64()
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.unwrap_err()
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.to_string();
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assert!(err.contains("503"), "{err}");
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}
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#[test]
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fn slow_server_concurrent_readers_fetch_each_block_once() {
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let bytes = multi_block_file();
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let server = Server::start(vec![("/m.h5".into(), bytes.clone())]);
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let url = server.url("/m.h5");
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let opts = Options {
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cache: CacheConfig {
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block_size: 256 << 10,
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max_request: 256 << 10,
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..CacheConfig::default()
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},
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|
..quick()
|
|
};
|
|
let storage = storage_for_url(&url, &opts).unwrap();
|
|
let file = File::open_storage(storage.clone()).unwrap();
|
|
let local = File::from_bytes(bytes).unwrap();
|
|
let want_big = local.dataset("big").unwrap().read_f64().unwrap();
|
|
let want_flat = local.dataset("flat").unwrap().read_f64().unwrap();
|
|
server.shared.delay_ms.store(40, Ordering::SeqCst);
|
|
server.reset();
|
|
std::thread::scope(|s| {
|
|
for t in 0..8 {
|
|
let (file, want_big, want_flat) = (&file, &want_big, &want_flat);
|
|
s.spawn(move || {
|
|
if t % 2 == 0 {
|
|
assert_eq!(&file.dataset("big").unwrap().read_f64().unwrap(), want_big);
|
|
} else {
|
|
assert_eq!(
|
|
&file.dataset("flat").unwrap().read_f64().unwrap(),
|
|
want_flat
|
|
);
|
|
}
|
|
});
|
|
}
|
|
});
|
|
let log = server.log();
|
|
let mut starts: Vec<u64> = log.iter().map(|(_, r)| r.unwrap().0).collect();
|
|
let n = starts.len();
|
|
starts.sort_unstable();
|
|
starts.dedup();
|
|
assert_eq!(n, starts.len(), "a block was fetched twice");
|
|
assert!(storage.stats().waits > 0, "readers shared fetches");
|
|
}
|
|
|
|
#[test]
|
|
fn bad_urls_and_statuses_are_clean_errors() {
|
|
let server = Server::start(vec![("/m.h5".into(), multi_block_file())]);
|
|
let err = open_url_with(&server.url("/missing.h5"), &quick()).unwrap_err();
|
|
assert!(
|
|
matches!(err, Error::Remote(RemoteError::Status { code: 404, .. })),
|
|
"{err}"
|
|
);
|
|
assert!(matches!(
|
|
open_url("ftp://example.com/a.h5"),
|
|
Err(Error::Remote(RemoteError::UnsupportedScheme(_)))
|
|
));
|
|
assert!(matches!(
|
|
open_url("no-scheme"),
|
|
Err(Error::Remote(RemoteError::InvalidUrl(_)))
|
|
));
|
|
#[cfg(not(feature = "s3"))]
|
|
{
|
|
let e = open_url("s3://bucket/key.h5").unwrap_err().to_string();
|
|
assert!(e.contains("`s3` feature"), "{e}");
|
|
}
|
|
#[cfg(not(feature = "https"))]
|
|
{
|
|
let e = open_url("https://example.com/a.h5")
|
|
.unwrap_err()
|
|
.to_string();
|
|
assert!(e.contains("`https` feature"), "{e}");
|
|
}
|
|
// A content-encoded body is not a byte range.
|
|
let server = Server::start(vec![("/m.h5".into(), multi_block_file())]);
|
|
server.shared.gzip_label.store(true, Ordering::SeqCst);
|
|
let e = open_url(&server.url("/m.h5")).unwrap_err().to_string();
|
|
assert!(e.contains("gzip-encoded"), "{e}");
|
|
// Not HDF5.
|
|
let server = Server::start(vec![("/x.h5".into(), vec![7u8; 5000])]);
|
|
assert!(matches!(
|
|
open_url(&server.url("/x.h5")),
|
|
Err(Error::Hdf5(_))
|
|
));
|
|
// A server that closes every connection unanswered: a network error
|
|
// after the retries. (Not a closed port: another test's server could
|
|
// take it meanwhile.)
|
|
let port = {
|
|
let l = std::net::TcpListener::bind("127.0.0.1:0").unwrap();
|
|
let port = l.local_addr().unwrap().port();
|
|
std::thread::spawn(move || {
|
|
for c in l.incoming() {
|
|
drop(c);
|
|
}
|
|
});
|
|
port
|
|
};
|
|
let err = open_url_with(&format!("http://127.0.0.1:{port}/a.h5"), &quick()).unwrap_err();
|
|
assert!(
|
|
matches!(err, Error::Remote(RemoteError::Transport(_))),
|
|
"{err}"
|
|
);
|
|
}
|
|
|
|
/// A request for a path the server does not serve (a local port scanner's
|
|
/// `GET /`) does not count against a test's request budget.
|
|
#[test]
|
|
fn requests_for_other_paths_are_not_counted() {
|
|
use std::io::{Read, Write};
|
|
let server = Server::start(vec![("/m.h5".into(), multi_block_file())]);
|
|
let mut probe = std::net::TcpStream::connect(server.addr).unwrap();
|
|
probe
|
|
.write_all(b"GET / HTTP/1.1\r\nHost: x\r\nConnection: close\r\n\r\n")
|
|
.unwrap();
|
|
let mut answer = String::new();
|
|
probe.read_to_string(&mut answer).unwrap();
|
|
assert!(answer.starts_with("HTTP/1.1 404"), "{answer}");
|
|
storage_for_url(&server.url("/m.h5"), &quick()).unwrap();
|
|
assert_eq!(server.requests(), 1, "only the open counts");
|
|
assert_eq!(server.log().len(), 1);
|
|
}
|