Implement authorization-fenced web workflows

crates/remora-api/src/public.rs

@@ -9,9 +9,9 @@ use remora_admission::{AdmissionDecision, AdmissionService};
 use remora_attempt::{AttemptService, CommittedResultRecord, ProgressSnapshot};
 use remora_contracts::{
     ApiErrorCodeDto, ApiErrorDto, CredentialMaterialDto, DateTimeDto, JobSubmissionDto,
-    NullableDto, SourceCredentialCreateDto, SourceCredentialDto, SourceCredentialKindDto,
-    SourceCredentialPageDto, SourceCredentialRotateDto, SourceCredentialStatusDto,
-    SourceCredentialVersionDto,
+    NullableDto, ResultMemberAccessDto, SourceCredentialCreateDto, SourceCredentialDto,
+    SourceCredentialKindDto, SourceCredentialPageDto, SourceCredentialRotateDto,
+    SourceCredentialStatusDto, SourceCredentialVersionDto,
 };
 use remora_credentials::{
     CreateCredential, CredentialCaller, CredentialError, CredentialRegistry, RotateTxOutcome,
@@ -384,7 +384,10 @@ async fn list_jobs(
     Ok(HttpResponse::Ok().json(json!({
         "items": items,
         "next_cursor": next_cursor,
-        "event_cursor": event_cursor
+        "event_cursor": event_cursor,
+        "management_capabilities": {
+            "revoke_execution_grants": principal.administrator
+        }
     })))
 }
 
@@ -493,14 +496,20 @@ async fn access_result_member(
         .targets
         .resolve(member.object().store(), member.object().bucket())
         .ok_or_else(PublicApiError::unavailable)?;
+    let issued_at = OffsetDateTime::now_utc();
     let access = target
         .presign_read(&member.exact_identity(), state.member_access_ttl)
         .await
         .map_err(|_| PublicApiError::unavailable())?;
-    Ok(HttpResponse::TemporaryRedirect()
-        .insert_header((header::LOCATION, access.url))
+    let duration =
+        time::Duration::try_from(access.expires_in).map_err(|_| PublicApiError::internal())?;
+    Ok(HttpResponse::Ok()
         .insert_header((header::CACHE_CONTROL, "no-store"))
-        .finish())
+        .insert_header((header::PRAGMA, "no-cache"))
+        .json(ResultMemberAccessDto {
+            url: access.url,
+            expires_at: datetime(issued_at + duration)?,
+        }))
 }
 
 async fn cancel_job(

crates/remora-api/tests/public_api.rs

@@ -290,6 +290,10 @@ async fn public_routes_are_authenticated_replayable_authorized_and_redacted() {
     assert_eq!(listed.status(), StatusCode::OK);
     let page: Value = listed.json().await.unwrap();
     serde_json::from_value::<JobPageDto>(page.clone()).unwrap();
+    assert_eq!(
+        page["management_capabilities"]["revoke_execution_grants"],
+        true
+    );
     let first_page_id = page["items"][0]["id"].as_str().unwrap();
     assert!(page["event_cursor"].as_str().unwrap().len() >= 16);
     let next_cursor = page["next_cursor"].as_str().unwrap();
@@ -616,8 +620,13 @@ async fn public_routes_are_authenticated_replayable_authorized_and_redacted() {
         .send()
         .await
         .unwrap();
-    assert_eq!(access.status(), StatusCode::TEMPORARY_REDIRECT);
+    assert_eq!(access.status(), StatusCode::OK);
     assert_eq!(access.headers()["cache-control"], "no-store");
+    assert_eq!(access.headers()["pragma"], "no-cache");
+    let access: Value = access.json().await.unwrap();
+    let access_url = reqwest::Url::parse(access["url"].as_str().unwrap()).unwrap();
+    assert!(matches!(access_url.scheme(), "http" | "https"));
+    assert!(access["expires_at"].is_string());
 
     let attempts = harness
         .request(reqwest::Method::GET, &format!("/jobs/{job_id}/attempts"))
@@ -743,6 +752,16 @@ async fn public_routes_are_authenticated_replayable_authorized_and_redacted() {
         .await
         .unwrap();
     assert_eq!(lost_scope.status(), StatusCode::NOT_FOUND);
+    let unprivileged_page = harness
+        .request_with_token(reqwest::Method::GET, "/jobs", &unprivileged_token)
+        .send()
+        .await
+        .unwrap();
+    assert_eq!(unprivileged_page.status(), StatusCode::OK);
+    assert_eq!(
+        unprivileged_page.json::<Value>().await.unwrap()["management_capabilities"]["revoke_execution_grants"],
+        false
+    );
     let hidden_submit_replay = harness
         .request_with_token(reqwest::Method::POST, "/jobs", &unprivileged_token)
         .header("Idempotency-Key", &submit_key)