Add Aliyun OSS EventBridge integration from aliyun branch

[Copilot]

Merges Aliyun OSS EventBridge webhook handler from the aliyun branch. Enables automatic CDN cache invalidation when objects change in OSS buckets.

Core Components

Aliyun API Client (src/aliyun/)

• V3 signature algorithm (HMAC-SHA256 with RFC 3986 encoding)
• CDN client with RefreshObjectCaches API for internal use
• Reusable signer for extensibility to other Aliyun services

API Endpoint (src/routes/aliyun_handlers.rs)

• POST /api/aliyun/events - OSS EventBridge webhook (custom token via x-eventbridge-signature-token header)

Configuration (src/config.rs, example.toml)

[aliyun]
access_key_id = "LTAI5t..."
access_key_secret = "xxxxx"

[aliyun.bucket_url_map]
"my-oss-bucket" = "https://cdn.example.com/{object_key}"

Notable Changes

• Made Claims.sub optional to support EventBridge JWT tokens without subject claims
• Updated tracing whitelist from my_axum_template to janus module prefix
• Added dependencies: sha2, hmac, base64, urlencoding, uuid

EventBridge Webhook Flow

1. OSS fires event (ObjectCreated/ObjectRemoved) → EventBridge
2. EventBridge POSTs to /api/aliyun/events with JWT token in custom header
3. Handler maps bucket name to CDN URL via bucket_url_map
4. URL template {object_key} replaced with percent-encoded object key
5. Automatic CDN cache refresh triggered via RefreshObjectCaches API

Example event processing:

// Event: bucket "static-assets", object "images/logo.png"
// Config: "static-assets" → "https://cdn.example.com/{object_key}"
// Result: Refreshes https://cdn.example.com/images%2Flogo.png

Original prompt

比较main和aliyun分支 创建一个pr把aliyun分支里面有关/aliyun/events的代码提交的main分支

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[daflyinbed]

@copilot 去掉/api/aliyun/events以外的两个接口

[Copilot]

@copilot 去掉/api/aliyun/events以外的两个接口

已完成。移除了 /api/aliyun/describeRefreshTasks 和 /api/aliyun/refreshObjectCaches 两个接口，现在只保留 /api/aliyun/events 接口用于处理 OSS EventBridge 事件。

Commit: 847cfce