golang的框架中集成第三方服务的最佳实践

package main

import (
    "context"
    "fmt"
    "net/http"
    "os"

    "cloud.google.com/go/storage"
)

func main() {
    // 从环境变量中读取 Google Cloud Storage 凭据
    ctx := context.Background()
    client, err := storage.NewClient(ctx)
    if err != nil {
        panic(err)
    }
    defer client.Close()

    // 创建 Gin 路由器
    r := gin.Default()

    // 注册用于上传文件的路由
    r.POST("/files", func(c *gin.Context) {
        // 从请求中获取上传的文件
        file, _, err := c.Request.FormFile("file")
        if err != nil {
            c.JSON(http.StatusBadRequest, gin.H{"error": "could not get file"})
            return
        }
        defer file.Close()

        // 从环境变量中读取存储存储桶名称
        bucketName := os.Getenv("GCS_BUCKET_NAME")

        // 上传文件到 Google Cloud Storage
        ctx := context.Background()
        obj := client.Bucket(bucketName).Object(file.Filename)
        wc := obj.NewWriter(ctx)
        if _, err := io.Copy(wc, file); err != nil {
            c.JSON(http.StatusInternalServerError, gin.H{"error": "could not upload file"})
            return
        }
        if err = wc.Close(); err != nil {
            c.JSON(http.StatusInternalServerError, gin.H{"error": "could not close writer"})
            return
        }

        // 将文件 URL 返回给客户端
        objAttrs, err := obj.Attrs(ctx)
        if err != nil {
            c.JSON(http.StatusInternalServerError, gin.H{"error": "could not get file attributes"})
            return
        }
        fmt.Fprintf(c.Writer, "%s", objAttrs.MediaLink)
    })

    r.Run()
}