Go SDK 支持最新的两个 Go 版本，只使用标准库。模块：github.com/teramoby/speedle-sdk/go v0.1.0，包名 speedle。参考文档：speedle-sdk/go。
示例检查的策略见 SDK 概览。
添加依赖
在新模块中执行：
go mod init example.com/speedle-example
go get github.com/teramoby/speedle-sdk/go@v0.1.0调用本地 Speedle
按 SDK 概览中的说明启动 Speedle 并创建示例策略。将以下程序保存为 main.go：
package main
import (
"context"
"fmt"
"os"
speedle "github.com/teramoby/speedle-sdk/go"
)
func main() {
client, err := speedle.NewClient(speedle.Config{
Backend: speedle.BackendSpeedlePlus,
Endpoint: "http://localhost:6734",
Auth: speedle.NoAuth(),
ServiceName: "docs",
})
if err != nil {
fmt.Fprintln(os.Stderr, "Speedle error:", err)
os.Exit(1)
}
defer client.Close()
ctx := context.Background()
allowed, err := client.IsAllowed(ctx, speedle.User("alice"), "get", "/docs/public", nil)
if err != nil {
fmt.Fprintln(os.Stderr, "Speedle error:", err)
os.Exit(1)
}
fmt.Printf("alice get /docs/public: allowed=%t\n", allowed)
d, err := client.Check(ctx, speedle.User("alice"), "delete", "/docs/public", nil)
if err != nil {
fmt.Fprintln(os.Stderr, "Speedle error:", err)
os.Exit(1)
}
fmt.Printf("alice delete /docs/public: allowed=%t reason=%s\n", d.Allowed, d.Reason)
}运行：
go run .输出：
alice get /docs/public: allowed=true
alice delete /docs/public: allowed=false reason=NO_APPLICABLE_POLICIES调用 Speedle Cloud
Speedle Cloud 即将上线。
程序从 SPEEDLE_SERVICE 读取服务名，从 SPEEDLE_TOKEN 读取该服务的令牌。SPEEDLE_ENDPOINT 可覆盖默认端点 https://cloud.speedle.io。将 main.go 替换为：
package main
import (
"context"
"fmt"
"os"
speedle "github.com/teramoby/speedle-sdk/go"
)
func main() {
endpoint := os.Getenv("SPEEDLE_ENDPOINT")
if endpoint == "" {
endpoint = "https://cloud.speedle.io"
}
client, err := speedle.NewClient(speedle.Config{
Backend: speedle.BackendSpeedleCloud,
Endpoint: endpoint,
Auth: speedle.BearerToken(os.Getenv("SPEEDLE_TOKEN")),
ServiceName: os.Getenv("SPEEDLE_SERVICE"),
})
if err != nil {
fmt.Fprintln(os.Stderr, "Speedle error:", err)
os.Exit(1)
}
defer client.Close()
ctx := context.Background()
allowed, err := client.IsAllowed(ctx, speedle.User("alice"), "get", "/docs/public", nil)
if err != nil {
fmt.Fprintln(os.Stderr, "Speedle error:", err)
os.Exit(1)
}
fmt.Printf("alice get /docs/public: allowed=%t\n", allowed)
d, err := client.Check(ctx, speedle.User("alice"), "delete", "/docs/public", nil)
if err != nil {
fmt.Fprintln(os.Stderr, "Speedle error:", err)
os.Exit(1)
}
fmt.Printf("alice delete /docs/public: allowed=%t reason=%s\n", d.Allowed, d.Reason)
}设置环境变量后运行。read -rs 不会把令牌写入 shell 历史，也不会显示在屏幕上：
export SPEEDLE_SERVICE=docs
read -rs SPEEDLE_TOKEN && export SPEEDLE_TOKEN
go run .服务中已有示例策略时，输出为：
alice get /docs/public: allowed=true
alice delete /docs/public: allowed=false reason=NO_APPLICABLE_POLICIES令牌是服务端密钥，切勿放进浏览器、移动应用或桌面客户端。
错误处理
请求被拒绝不是错误：IsAllowed 返回 false，Check 返回 Allowed 为 false 的结果及原因，如上文的 delete 调用。在默认设置下，调用无法得出授权结果时，调用返回非 nil 的 error（配置无效时 NewClient 也是如此）。示例向标准错误输出 Speedle error: <消息>，并以状态码 1 退出。