对特定路径仅使用 Brotli 压缩

创建一条 compression rule，将 Brotli 设为特定 URI 路径唯一支持的压缩算法。

以下示例规则会为特定 URI 路径仅配置 Brotli 压缩。

When incoming requests match（当传入请求匹配时）

Custom filter expression:
- URI Path equals /download/assets.tar

Then（然后）

Compression options: Custom
Define a custom order for compression types: Brotli

由于规则配置未在自定义算法列表末尾包含 Auto，如果 Web 访问者不支持 Brotli，响应将保持未压缩状态。

以下示例使用 Update a zone ruleset 操作，将现有 entry point ruleset（ID 为 {ruleset_id}）在 http_response_compression 阶段的规则设置为单条 compression rule：

Required API token permissions

At least one of the following token permissions is required:

Response Compression Write
Config Settings Write
Dynamic URL Redirects Write
Cache Settings Write
Custom Errors Write
Origin Write
Managed headers Write
Zone Transform Rules Write
Mass URL Redirects Write
Magic Firewall Write
L4 DDoS Managed Ruleset Write
HTTP DDoS Managed Ruleset Write
Sanitize Write
Transform Rules Write
Select Configuration Write
Bot Management Write
Zone WAF Write
Account WAF Write
Account Rulesets Write
Logs Write
Logs Write

Update a zone rulesetbash

curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/rulesets/$RULESET_ID" \
	--request PUT \
	--header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
	--json '{
		"rules": [
				{
						"ref": "use_only_brotli_for_assets_tar",
						"expression": "http.request.uri.path eq \"/download/assets.tar\"",
						"action": "compress_response",
						"action_parameters": {
								"algorithms": [
										{
												"name": "brotli"
										}
								]
						}
				}
		]
	}'

使用 Terraform 时，通过 ref 字段可在更新后保持稳定的规则 ID。添加该字段可防止 Terraform 在变更时重建规则。更多信息请参阅故障排除（Terraform 文档）。