Add support for file URL without algorithm and refactor JSON serialization for Python-style compatibility

- Added `/file/1/{digest}` route to support file retrieval without specifying the algorithm.
- Implemented a Python-compatible JSON serializer to ensure consistent formatting for catalog artifacts.
- Replaced `HashMap` with `BTreeMap` for deterministic ordering in catalog serialization and updates.
- Updated integration tests to validate the new route functionality and ensure response correctness.
- Refactored `format_iso8601_basic` to improve timestamp formatting consistency.

libips/src/repository/catalog.rs

@@ -5,7 +5,7 @@
 
 use miette::Diagnostic;
 use serde::{Deserialize, Serialize};
-use std::collections::HashMap;
+use std::collections::BTreeMap;
 use std::fs;
 use std::io;
 use std::path::{Path, PathBuf};
@@ -64,7 +64,7 @@ pub enum CatalogError {
 pub type Result<T> = std::result::Result<T, CatalogError>;
 
 /// Format a SystemTime as an ISO-8601 'basic format' date in UTC
-fn format_iso8601_basic(time: &SystemTime) -> String {
+pub fn format_iso8601_basic(time: &SystemTime) -> String {
     let datetime = convert_system_time_to_datetime(time);
     format!("{}Z", datetime.format("%Y%m%dT%H%M%S.%f"))
 }
@@ -141,18 +141,18 @@ pub struct CatalogAttrs {
     pub package_version_count: usize,
 
     /// Available catalog parts
-    pub parts: HashMap<String, CatalogPartInfo>,
+    pub parts: BTreeMap<String, CatalogPartInfo>,
 
     /// Available update logs
-    #[serde(skip_serializing_if = "HashMap::is_empty")]
-    pub updates: HashMap<String, UpdateLogInfo>,
+    #[serde(skip_serializing_if = "BTreeMap::is_empty")]
+    pub updates: BTreeMap<String, UpdateLogInfo>,
 
     /// Catalog version
     pub version: u32,
 
     /// Optional signature information
     #[serde(rename = "_SIGNATURE", skip_serializing_if = "Option::is_none")]
-    pub signature: Option<HashMap<String, String>>,
+    pub signature: Option<BTreeMap<String, String>>,
 }
 
 impl CatalogAttrs {
@@ -167,8 +167,8 @@ impl CatalogAttrs {
             last_modified: timestamp,
             package_count: 0,
             package_version_count: 0,
-            parts: HashMap::new(),
-            updates: HashMap::new(),
+            parts: BTreeMap::new(),
+            updates: BTreeMap::new(),
             version: CatalogVersion::V1 as u32,
         }
     }
@@ -208,11 +208,11 @@ pub struct PackageVersionEntry {
 pub struct CatalogPart {
     /// Packages by publisher and stem
     #[serde(flatten)]
-    pub packages: HashMap<String, HashMap<String, Vec<PackageVersionEntry>>>,
+    pub packages: BTreeMap<String, BTreeMap<String, Vec<PackageVersionEntry>>>,
 
     /// Optional signature information
     #[serde(rename = "_SIGNATURE", skip_serializing_if = "Option::is_none")]
-    pub signature: Option<HashMap<String, String>>,
+    pub signature: Option<BTreeMap<String, String>>,
 }
 
 impl CatalogPart {
@@ -220,7 +220,7 @@ impl CatalogPart {
     pub fn new() -> Self {
         CatalogPart {
             signature: None,
-            packages: HashMap::new(),
+            packages: BTreeMap::new(),
         }
     }
 
@@ -235,7 +235,7 @@ impl CatalogPart {
         let publisher_packages = self
             .packages
             .entry(publisher.to_string())
-            .or_insert_with(HashMap::new);
+            .or_insert_with(BTreeMap::new);
         let stem_versions = publisher_packages
             .entry(fmri.stem().to_string())
             .or_insert_with(Vec::new);
@@ -310,7 +310,7 @@ pub struct PackageUpdateEntry {
 
     /// Catalog part entries
     #[serde(flatten)]
-    pub catalog_parts: HashMap<String, HashMap<String, Vec<String>>>,
+    pub catalog_parts: BTreeMap<String, BTreeMap<String, Vec<String>>>,
 
     /// Optional SHA-1 signature of the package manifest
     #[serde(rename = "signature-sha-1", skip_serializing_if = "Option::is_none")]
@@ -321,11 +321,11 @@ pub struct PackageUpdateEntry {
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct UpdateLog {
     /// Updates by publisher and stem
-    pub updates: HashMap<String, HashMap<String, Vec<PackageUpdateEntry>>>,
+    pub updates: BTreeMap<String, BTreeMap<String, Vec<PackageUpdateEntry>>>,
 
     /// Optional signature information
     #[serde(rename = "_SIGNATURE", skip_serializing_if = "Option::is_none")]
-    pub signature: Option<HashMap<String, String>>,
+    pub signature: Option<BTreeMap<String, String>>,
 }
 
 impl UpdateLog {
@@ -333,7 +333,7 @@ impl UpdateLog {
     pub fn new() -> Self {
         UpdateLog {
             signature: None,
-            updates: HashMap::new(),
+            updates: BTreeMap::new(),
         }
     }
 
@@ -343,13 +343,13 @@ impl UpdateLog {
         publisher: &str,
         fmri: &Fmri,
         op_type: CatalogOperationType,
-        catalog_parts: HashMap<String, HashMap<String, Vec<String>>>,
+        catalog_parts: BTreeMap<String, BTreeMap<String, Vec<String>>>,
         signature: Option<String>,
     ) {
         let publisher_updates = self
             .updates
             .entry(publisher.to_string())
-            .or_insert_with(HashMap::new);
+            .or_insert_with(BTreeMap::new);
         let stem_updates = publisher_updates
             .entry(fmri.stem().to_string())
             .or_insert_with(Vec::new);
@@ -393,10 +393,10 @@ pub struct CatalogManager {
     attrs: CatalogAttrs,
 
     /// Catalog parts
-    parts: HashMap<String, CatalogPart>,
+    parts: BTreeMap<String, CatalogPart>,
 
     /// Update logs
-    update_logs: HashMap<String, UpdateLog>,
+    update_logs: BTreeMap<String, UpdateLog>,
 }
 
 impl CatalogManager {
@@ -421,8 +421,8 @@ impl CatalogManager {
             catalog_dir: publisher_catalog_dir,
             publisher: publisher.to_string(),
             attrs,
-            parts: HashMap::new(),
-            update_logs: HashMap::new(),
+            parts: BTreeMap::new(),
+            update_logs: BTreeMap::new(),
         })
     }
 
@@ -572,7 +572,7 @@ impl CatalogManager {
         log_name: &str,
         fmri: &Fmri,
         op_type: CatalogOperationType,
-        catalog_parts: HashMap<String, HashMap<String, Vec<String>>>,
+        catalog_parts: BTreeMap<String, BTreeMap<String, Vec<String>>>,
         signature: Option<String>,
     ) -> Result<()> {
         if let Some(log) = self.update_logs.get_mut(log_name) {

libips/src/repository/catalog_writer.rs

@@ -7,11 +7,47 @@ use std::fs;
 use std::io::Write;
 use std::path::{Path, PathBuf};
 
+use serde::Serialize;
+use serde_json::ser::{Formatter, Serializer};
 use tracing::{debug, instrument};
 
 use super::catalog::{CatalogAttrs, CatalogPart, UpdateLog};
 use super::{RepositoryError, Result};
 
+// Python-compatible JSON formatter to ensure (', ', ': ') separators
+struct PythonFormatter;
+
+impl Formatter for PythonFormatter {
+    fn begin_object_key<W: ?Sized + Write>(&mut self, writer: &mut W, first: bool) -> std::io::Result<()> {
+        if !first {
+            writer.write_all(b", ")?;
+        }
+        Ok(())
+    }
+
+    fn begin_object_value<W: ?Sized + Write>(&mut self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_all(b": ")
+    }
+
+    fn begin_array_value<W: ?Sized + Write>(&mut self, writer: &mut W, first: bool) -> std::io::Result<()> {
+        if !first {
+            writer.write_all(b", ")?;
+        }
+        Ok(())
+    }
+}
+
+fn serialize_python_style<T: Serialize>(value: &T) -> Result<Vec<u8>> {
+    let mut bytes = Vec::new();
+    let formatter = PythonFormatter;
+    let mut ser = Serializer::with_formatter(&mut bytes, formatter);
+    value.serialize(&mut ser).map_err(|e| {
+        RepositoryError::JsonSerializeError(format!("Python-style serialize error: {}", e))
+    })?;
+    bytes.push(b'\n');
+    Ok(bytes)
+}
+
 fn sha1_hex(bytes: &[u8]) -> String {
     use sha1::Digest as _;
     let mut hasher = sha1::Sha1::new();
@@ -53,17 +89,13 @@ fn atomic_write_bytes(path: &Path, bytes: &[u8]) -> Result<()> {
 pub(crate) fn write_catalog_attrs(path: &Path, attrs: &mut CatalogAttrs) -> Result<String> {
     // Compute signature over content without _SIGNATURE
     attrs.signature = None;
-    let bytes_without_sig = serde_json::to_vec(&attrs).map_err(|e| {
-        RepositoryError::JsonSerializeError(format!("Catalog attrs serialize error: {}", e))
-    })?;
+    let bytes_without_sig = serialize_python_style(&attrs)?;
     let sig = sha1_hex(&bytes_without_sig);
-    let mut sig_map = std::collections::HashMap::new();
+    let mut sig_map = std::collections::BTreeMap::new();
     sig_map.insert("sha-1".to_string(), sig);
     attrs.signature = Some(sig_map);
 
-    let final_bytes = serde_json::to_vec(&attrs).map_err(|e| {
-        RepositoryError::JsonSerializeError(format!("Catalog attrs serialize error: {}", e))
-    })?;
+    let final_bytes = serialize_python_style(&attrs)?;
     debug!(path = %path.display(), bytes = final_bytes.len(), "writing catalog.attrs");
     atomic_write_bytes(path, &final_bytes)?;
     // safe to unwrap as signature was just inserted
@@ -78,17 +110,13 @@ pub(crate) fn write_catalog_attrs(path: &Path, attrs: &mut CatalogAttrs) -> Resu
 pub(crate) fn write_catalog_part(path: &Path, part: &mut CatalogPart) -> Result<String> {
     // Compute signature over content without _SIGNATURE
     part.signature = None;
-    let bytes_without_sig = serde_json::to_vec(&part).map_err(|e| {
-        RepositoryError::JsonSerializeError(format!("Catalog part serialize error: {}", e))
-    })?;
+    let bytes_without_sig = serialize_python_style(&part)?;
     let sig = sha1_hex(&bytes_without_sig);
-    let mut sig_map = std::collections::HashMap::new();
+    let mut sig_map = std::collections::BTreeMap::new();
     sig_map.insert("sha-1".to_string(), sig);
     part.signature = Some(sig_map);
 
-    let final_bytes = serde_json::to_vec(&part).map_err(|e| {
-        RepositoryError::JsonSerializeError(format!("Catalog part serialize error: {}", e))
-    })?;
+    let final_bytes = serialize_python_style(&part)?;
     debug!(path = %path.display(), bytes = final_bytes.len(), "writing catalog part");
     atomic_write_bytes(path, &final_bytes)?;
     Ok(part
@@ -102,17 +130,13 @@ pub(crate) fn write_catalog_part(path: &Path, part: &mut CatalogPart) -> Result<
 pub(crate) fn write_update_log(path: &Path, log: &mut UpdateLog) -> Result<String> {
     // Compute signature over content without _SIGNATURE
     log.signature = None;
-    let bytes_without_sig = serde_json::to_vec(&log).map_err(|e| {
-        RepositoryError::JsonSerializeError(format!("Update log serialize error: {}", e))
-    })?;
+    let bytes_without_sig = serialize_python_style(&log)?;
     let sig = sha1_hex(&bytes_without_sig);
-    let mut sig_map = std::collections::HashMap::new();
+    let mut sig_map = std::collections::BTreeMap::new();
     sig_map.insert("sha-1".to_string(), sig);
     log.signature = Some(sig_map);
 
-    let final_bytes = serde_json::to_vec(&log).map_err(|e| {
-        RepositoryError::JsonSerializeError(format!("Update log serialize error: {}", e))
-    })?;
+    let final_bytes = serialize_python_style(&log)?;
     debug!(path = %path.display(), bytes = final_bytes.len(), "writing update log");
     atomic_write_bytes(path, &final_bytes)?;
     Ok(log

libips/src/repository/file_backend.rs

@@ -10,7 +10,7 @@ use lz4::EncoderBuilder;
 use regex::Regex;
 use serde::{Deserialize, Serialize};
 use sha2::{Digest as Sha2Digest, Sha256};
-use std::collections::{HashMap, HashSet};
+use std::collections::{HashMap, HashSet, BTreeMap};
 use std::fs;
 use std::fs::File;
 use std::io::{Read, Write};
@@ -228,28 +228,6 @@ pub struct FileBackend {
         Option<std::cell::RefCell<crate::repository::obsoleted::ObsoletedPackageManager>>,
 }
 
-/// Format a SystemTime as an ISO 8601 timestamp string
-fn format_iso8601_timestamp(time: &SystemTime) -> String {
-    let duration = time
-        .duration_since(SystemTime::UNIX_EPOCH)
-        .unwrap_or_else(|_| std::time::Duration::from_secs(0));
-
-    let secs = duration.as_secs();
-    let micros = duration.subsec_micros();
-
-    // Format as ISO 8601 with microsecond precision
-    format!(
-        "{:04}-{:02}-{:02}T{:02}:{:02}:{:02}.{:06}Z",
-        // Convert seconds to date and time components
-        1970 + secs / 31536000,          // year (approximate)
-        (secs % 31536000) / 2592000 + 1, // month (approximate)
-        (secs % 2592000) / 86400 + 1,    // day (approximate)
-        (secs % 86400) / 3600,           // hour
-        (secs % 3600) / 60,              // minute
-        secs % 60,                       // second
-        micros                           // microseconds
-    )
-}
 
 /// Transaction for publishing packages
 pub struct Transaction {
@@ -759,9 +737,9 @@ impl ReadableRepository for FileBackend {
             let updated = if latest_timestamp == SystemTime::UNIX_EPOCH {
                 // If no files were found, use the current time
                 let now = SystemTime::now();
-                format_iso8601_timestamp(&now)
+                crate::repository::catalog::format_iso8601_basic(&now)
             } else {
-                format_iso8601_timestamp(&latest_timestamp)
+                crate::repository::catalog::format_iso8601_basic(&latest_timestamp)
             };
 
             // Create a PublisherInfo struct and add it to the list
@@ -1801,9 +1779,9 @@ impl FileBackend {
         locale: &str,
         fmri: &crate::fmri::Fmri,
         op_type: crate::repository::catalog::CatalogOperationType,
-        catalog_parts: std::collections::HashMap<
+        catalog_parts: std::collections::BTreeMap<
             String,
-            std::collections::HashMap<String, Vec<String>>,
+            std::collections::BTreeMap<String, Vec<String>>,
         >,
         signature_sha1: Option<String>,
     ) -> Result<()> {
@@ -1830,7 +1808,7 @@ impl FileBackend {
             Some(p) => p,
             None => {
                 let now = std::time::SystemTime::now();
-                let ts = format_iso8601_timestamp(&now); // e.g., 20090508T161025.686485Z
+                let ts = crate::repository::catalog::format_iso8601_basic(&now); // e.g., 20090508T161025.686485Z
                 let stem = ts.split('.').next().unwrap_or(&ts); // take up to seconds
                 catalog_dir.join(format!("update.{}.{}", stem, locale))
             }
@@ -1863,7 +1841,7 @@ impl FileBackend {
             Some(s) => s,
             None => {
                 let now = std::time::SystemTime::now();
-                let ts = format_iso8601_timestamp(&now);
+                let ts = crate::repository::catalog::format_iso8601_basic(&now);
                 ts.split('.').next().unwrap_or(&ts).to_string()
             }
         };
@@ -2386,18 +2364,18 @@ impl FileBackend {
 
             // Prepare update entry if needed
             if create_update_log {
-                let mut catalog_parts = HashMap::new();
+                let mut catalog_parts = BTreeMap::new();
 
                 // Add dependency actions to update entry
                 if !dependency_actions.is_empty() {
-                    let mut actions = HashMap::new();
+                    let mut actions = BTreeMap::new();
                     actions.insert("actions".to_string(), dependency_actions);
                     catalog_parts.insert("catalog.dependency.C".to_string(), actions);
                 }
 
                 // Add summary actions to update entry
                 if !summary_actions.is_empty() {
-                    let mut actions = HashMap::new();
+                    let mut actions = BTreeMap::new();
                     actions.insert("actions".to_string(), summary_actions);
                     catalog_parts.insert("catalog.summary.C".to_string(), actions);
                 }
@@ -2427,7 +2405,7 @@ impl FileBackend {
 
         // Create a catalog.attrs file
         let now = SystemTime::now();
-        let timestamp = format_iso8601_timestamp(&now);
+        let timestamp = crate::repository::catalog::format_iso8601_basic(&now);
 
         // Get the CatalogAttrs struct definition to see what fields it has
         let mut attrs = crate::repository::catalog::CatalogAttrs {
@@ -2435,10 +2413,10 @@ impl FileBackend {
             last_modified: timestamp.clone(),
             package_count,
             package_version_count,
-            parts: HashMap::new(),
+            parts: BTreeMap::new(),
             version: 1, // CatalogVersion::V1 is 1
             signature: None,
-            updates: HashMap::new(),
+            updates: BTreeMap::new(),
         };
 
         // Add part information

pkg6depotd/src/http/handlers/file.rs

@@ -16,6 +16,23 @@ pub async fn get_file(
     State(repo): State<Arc<DepotRepo>>,
     Path((publisher, _algo, digest)): Path<(String, String, String)>,
     req: Request,
+) -> Result<Response, DepotError> {
+    get_file_impl(repo, publisher, digest, req).await
+}
+
+pub async fn get_file_no_algo(
+    State(repo): State<Arc<DepotRepo>>,
+    Path((publisher, digest)): Path<(String, String)>,
+    req: Request,
+) -> Result<Response, DepotError> {
+    get_file_impl(repo, publisher, digest, req).await
+}
+
+async fn get_file_impl(
+    repo: Arc<DepotRepo>,
+    publisher: String,
+    digest: String,
+    req: Request,
 ) -> Result<Response, DepotError> {
     let path = repo.get_file_path(&publisher, &digest).ok_or_else(|| {
         DepotError::Repo(libips::repository::RepositoryError::NotFound(

pkg6depotd/src/http/routes.rs

@@ -31,6 +31,10 @@ pub fn app_router(state: Arc<DepotRepo>) -> Router {
             "/{publisher}/file/1/{algo}/{digest}",
             get(file::get_file).head(file::get_file),
         )
+        .route(
+            "/{publisher}/file/1/{digest}",
+            get(file::get_file_no_algo).head(file::get_file_no_algo),
+        )
         .route("/{publisher}/info/0/{fmri}", get(info::get_info))
         .route("/{publisher}/publisher/0", get(publisher::get_publisher_v0))
         .route("/{publisher}/publisher/1", get(publisher::get_publisher_v1))

pkg6depotd/tests/integration_tests.rs

@@ -326,3 +326,58 @@ async fn test_ini_only_repo_serving_catalog() {
         }
     }
 }
+
+#[tokio::test]
+async fn test_file_url_without_algo() {
+    // Setup
+    let temp_dir = TempDir::new().unwrap();
+    let repo_path = setup_repo(&temp_dir);
+
+    let config = Config {
+        server: ServerConfig {
+            bind: vec!["127.0.0.1:0".to_string()],
+            workers: None,
+            max_connections: None,
+            reuseport: None,
+            cache_max_age: Some(3600),
+            tls_cert: None,
+            tls_key: None,
+        },
+        repository: RepositoryConfig {
+            root: repo_path.clone(),
+            mode: Some("readonly".to_string()),
+        },
+        telemetry: None,
+        publishers: None,
+        admin: None,
+        oauth2: None,
+    };
+
+    let repo = DepotRepo::new(&config).unwrap();
+    let state = Arc::new(repo);
+    let router = http::routes::app_router(state);
+
+    let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
+    let addr = listener.local_addr().unwrap();
+
+    // Spawn server
+    tokio::spawn(async move {
+        http::server::run(router, listener).await.unwrap();
+    });
+
+    let client = reqwest::Client::new();
+    let base_url = format!("http://{}", addr);
+
+    // Hash found in repo (SHA256 of compressed content likely)
+    let hash = "40dafd2319edb9b7c930958f7b8d2d59198f88c906d50811b21436008ef0746f";
+
+    // Test URL without algo
+    // Expected format: /{publisher}/file/1/{hash}
+    let url = format!("{}/test/file/1/{}", base_url, hash);
+    println!("Requesting: {}", url);
+    
+    let resp = client.get(&url).send().await.unwrap();
+    
+    assert_eq!(resp.status(), 200, "Should handle file URL without algorithm");
+    let _content = resp.text().await.unwrap();
+}