Gin上传文件时不断返回204

Question

我收到带有 OPTIONS 方法的 204，但似乎没有达到终点

只需构建一个简单的文件上传端点，如下所示：

package main

import  (
    "cloud.google.com/go/storage"
    "github.com/gin-gonic/gin"
    "github.com/gin-contrib/cors"
    "google.golang.org/api/option"
    "io"
    "log"
)

 const uploadBucket = "some-cool-bucket-name"
 const uploadApiKey = "some-advanced-key"

func main() {
    router := gin.Default()

    rg := router.Group("api/v1/photo")
    {
        rg.PATCH("/", uploadFile)
    }

    router.Use(cors.Default())

    router.Run()
}

func uploadFile(c *gin.Context) {
    mr, e := c.Request.MultipartReader()
    if e != nil {
        panic("Error reading request")
    }

    client, e := storage.NewClient(c, option.WithAPIKey(uploadApiKey))
    bucket := client.Bucket(uploadBucket)

    for {
        p, e := mr.NextPart()

        if e == io.EOF {
            break
        } else if e != nil {
            panic("Error processing file")
        }

        w := bucket.Object(p.FileName()).NewWriter(c)

        if _, e := io.Copy(w, p); e != nil {
            panic("Error during chunk upload")
        } else if e := w.Close(); e != nil {
            panic("Could not finalize chunk writing")
        }

    }
}

有什么想法吗？

Answer 1

使用以下 CORS：

func CORS() gin.HandlerFunc {
    // TO allow CORS
    return func(c *gin.Context) {
        c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
        c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
        c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT, DELETE")
        if c.Request.Method == "OPTIONS" {
            c.AbortWithStatus(204)
            return
        }
        c.Next()
    }
}

接下来，您必须将 cors 添加到您的路线中：

    router := gin.Default()
    router.Use(CORS())

另外，使用 POST 方法而不是 PATCH 会更好。我非常确定它会解决您的问题。