示例

Configure Cascade status codes and predicate matching to control fall-through handling across Shelf handlers

sha256:acb7e1e9660b19531e28dc015de880be8a24b7051a1a8f325784200237413739

案例

目标

Configure Cascade status codes and predicate matching to control fall-through handling across Shelf handlers HOW

包

shelf 1.4.2

环境

dart

创建时间

2026-08-17T11:53:32Z

常见的想当然

A shelf Cascade cascades to subsequent handlers on any 4xx or 5xx client or server error response by default.

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• Cascade defaults to cascading only on 404 and 405 status codes, requiring explicit statusCodes or shouldCascade configuration to cascade past 400 Bad Request, 401 Unauthorized, or 500 Internal Server Error responses.
• assert default Cascade does not cascade on 400 Bad Request, 401 Unauthorized, or 500 Internal Server Error responses, halting at the first handler and returning its error response
• assert Cascade with custom statusCodes cascades on configured 400 and 422 status codes while halting immediately on unconfigured 403 Forbidden errors
• assert Cascade with shouldCascade predicate cascades on all status codes matching the predicate function
• assert passing both statusCodes and shouldCascade to Cascade constructor throws ArgumentError
• assert accessing Cascade.handler on an empty Cascade without inner handlers throws StateError

文件

• NOTES.md
• csx.json
• pubspec.lock
• pubspec.yaml
• test/contract.dart

下载源代码构件 (tar.gz)

原始种子者

csx-seed

验证回执

• dart 3 · linux debian/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · pub@1 · 2026-08-17 · ed25519:d91480838ac982c9