Question

我正在开发一个使用图片上传功能的应用程序。应用程序后端是在Golang中编写的，其中前端位于Angular4中。我正在使用Gin框架在Golang中运行http请求。

以下是上传图片的Golang代码：

var popup = new ol.Overlay.Popup();
map.addOverlay(popup);

前端和后端也位于具有子域的同一域中。当请求从前端生成时。

我在Golang代码中传递了以下标题：

func UploadFile(c *gin.Context){
    imageData := make(map[string]interface{})
    response := ResponseController{}

    /* ------ Get current date ------ */
    currDate        := time.Now().UTC()
    yearString      := strconv.Itoa(currDate.Year())
    monthString     := strconv.Itoa(int(currDate.Month()))
    dayString       := strconv.Itoa(currDate.Day())

    path := config.UploadBasePath+config.AppFolder+config.UploadsFolder+yearString+"/"+monthString+"/"+dayString+"/"

    /* create temp directory if does not exist */
    if _, err := os.Stat(path); os.IsNotExist(err) {
        os.MkdirAll(path, 0755)
    }

    /* read data from form */
    file, err := c.FormFile("file")
    if err != nil {
        response = ResponseController{
            config.FailureCode,
            config.FailureFlag,
            "Error while reading image.",
            nil,
        }
        GetResponse(c, response)
        return
    }
    filePath := path+file.Filename
    if err := c.SaveUploadedFile(file, filePath); err != nil {
        response = ResponseController{
            config.FailureCode,
            config.FailureFlag,
            "Error while uploading image.",
            err,
        }
        GetResponse(c, response)
        return
    }
    uploadUrl := "/"+config.UploadsFolder+yearString+"/"+monthString+"/"+dayString+"/"+file.Filename
    imageData["upload_url"] = uploadUrl

    response = ResponseController{
        config.SuccessCode,
        config.SuccessFlag,
        "Image uploaded successfully.",
        imageData,
    }
    GetResponse(c, response)
}

当我上传图片时，它会在控制台中返回以下错误，图片无法上传：

c.Writer.Header().Set("Access-Control-Allow-Origin", "*") c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")

任何人都可以指导我在这里缺少的东西。谢谢！

Answer 1

尝试在路由器中设置OPTIONS router.HandleFunc("/", getModulos).Methods("POST", "GET", "OPTIONS")

您可以将CONTENT-TYPE设置为w.Header().Set("Access-Control-Allow-Headers", "Content-Type")

即使主域相同，也会阻止跨源请求

1 个答案: