在localhost:8080上运行的服务器从在9090上运行的前端获取CORS
I have a API-server (gin-gonic) running on localhost:8080. All the typical CORS-Header are set for debugging: When I try to test the API with a simple Frontend (swagger-ui) i get a CORS-error. (swagger is running on localhost:9090)
It works when everything is running on the same domain.
c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
c.Writer.Header().Set("Access-Control-Allow-Headers", "*")
c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT")
why is this not working. Should the 3 lines not keep all CORS problems away?
Im super curious for actual explanations rather than a plain solution. All resources regarding this (or a good one about CORS) are welcome.
It works fine in Postman or CURL
我有一个在本地主机上运行的API服务器(gin-gonic):8080。 所有典型的CORS-Header 设置用于调试: 当我尝试使用简单的前端(swagger-ui)测试API时,出现CORS错误。 (swagger在本地主机上运行:9090) p>
当所有内容都在同一域上运行时有效。 p>
c.Writer.Header ().Set(“ Access-Control-Allow-Origin”,“ *”)
c.Writer.Header()。Set(“ Access-Control-Allow-Headers”,“ *”)
c.Writer.Header ().Set(“ Access-Control-Allow-Methods,” POST,OPTIONS,GET,PUT“)
code> pre>
为什么这不起作用。 这三行代码是否不能解决所有CORS问题? p>
我非常想知道实际的解释,而不是一个简单的解决方案。 欢迎使用与此相关的所有资源(或有关CORS的好资源)。 p>
在Postman或CURL中工作正常 p>
When you catch OPTION as Preflight request your server should return success. I cannot find return in your provided code.
Also you can try to use https://github.com/rs/cors
package main
import (
"net/http"
"github.com/gin-gonic/gin"
cors "github.com/rs/cors/wrapper/gin"
)
func main() {
router := gin.Default()
router.Use(cors.Default())
router.GET("/", func(context *gin.Context) {
context.JSON(http.StatusOK, gin.H{"hello": "world"})
})
router.Run(":8080")
}