Integration of golang framework and cloud platform

import (
    "context"
    "fmt"
    "github.com/labstack/echo/v4"
    "google.golang.org/api/storage/v1"
)

func uploadFile(c echo.Context) error {
    // 获取上传的文件
    file, err := c.FormFile("file")
    if err != nil {
        return echo.NewHTTPError(http.StatusBadRequest, "Invalid file")
    }

    // 创建 Cloud Storage 客户端
    ctx := context.Background()
    storageClient, err := storage.NewService(ctx)
    if err != nil {
        return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create Cloud Storage client")
    }

    // 创建对象
    obj := &storage.Object{
        Name: file.Filename,
    }

    // 上传文件
    wr := storageClient.Objects.Insert("my-bucket", obj).Media(file.Reader)
    _, err = wr.Do()
    if err != nil {
        return echo.NewHTTPError(http.StatusInternalServerError, "Failed to upload file")
    }

    // 返回上传结果
    return c.JSON(http.StatusOK, map[string]string{
        "success": "true",
        "url":     fmt.Sprintf("https://storage.googleapis.com/my-bucket/%s", obj.Name),
    })
}

import (
    "github.com/gin-gonic/gin"
    "io"
    "net/http"

    "github.com/aws/aws-sdk-go/aws"
    "github.com/aws/aws-sdk-go/aws/session"
    "github.com/aws/aws-sdk-go/service/s3"
)

func downloadFile(c *gin.Context) {
    // 获取下载的文件名
    fileName := c.Param("fileName")

    // 创建 S3 客户端
    sess, err := session.NewSession(&aws.Config{
        Region: aws.String("us-west-1"),
    })
    if err != nil {
        c.JSON(http.StatusInternalServerError, gin.H{
            "error": err.Error(),
        })
        return
    }
    client := s3.New(sess)

    // 获取文件内容
    resp, err := client.GetObject(&s3.GetObjectInput{
        Bucket: aws.String("my-bucket"),
        Key:    aws.String(fileName),
    })
    if err != nil {
        c.JSON(http.StatusInternalServerError, gin.H{
            "error": err.Error(),
        })
        return
    }

    // 将文件内容输出给客户端
    c.Header("Content-Disposition", "attachment; filename="+fileName)
    io.Copy(c.Writer, resp.Body)
    resp.Body.Close()
}