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package middleware
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import (
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"bytes"
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"encoding/json"
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"github.com/gin-gonic/gin"
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"io/ioutil"
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"net/http"
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)
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func CorsHandler() gin.HandlerFunc {
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return func(context *gin.Context) {
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context.Writer.Header().Set("Access-Control-Allow-Origin", "*")
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context.Header("Access-Control-Allow-Methods", "*")
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context.Header("Access-Control-Allow-Headers", "*")
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context.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers,Cache-Control,Content-Language,Content-Type,Expires,Last-Modified,Pragma,FooBar") // 跨域关键设置 让浏览器可以解析
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context.Header("Access-Control-Max-Age", "172800") // 缓存请求信息 单位为秒
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context.Header("Access-Control-Allow-Credentials", "false") // 跨域请求是否需要带cookie信息 默认设置为true
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context.Header("content-type", "application/json") // 设置返回格式是json
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//Release all option pre-requests
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if context.Request.Method == http.MethodOptions {
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context.JSON(http.StatusOK, "Options Request!")
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}
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context.Next()
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}
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}
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func GinParseOperationID(c *gin.Context) {
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if c.Request.Method == http.MethodPost {
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operationID := c.Request.Header.Get("operationID")
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if operationID == "" {
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body, err := ioutil.ReadAll(c.Request.Body)
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if err != nil {
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c.String(400, "read request body error: "+err.Error())
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c.Abort()
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return
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}
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req := struct {
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OperationID string `json:"operationID"`
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}{}
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if err := json.Unmarshal(body, &req); err != nil {
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c.String(400, "get operationID error: "+err.Error())
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c.Abort()
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return
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}
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if req.OperationID == "" {
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c.String(400, "operationID empty")
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c.Abort()
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return
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}
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c.Request.Body = ioutil.NopCloser(bytes.NewReader(body))
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operationID = req.OperationID
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c.Request.Header.Set("operationID", operationID)
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}
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c.Set("operationID", operationID)
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c.Next()
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return
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}
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c.Next()
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}
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