Gin Memcached Middleware

If you are using gin to build a webservice, and you want to use memcached to store your data, you will search some articles about how to create a middleware to do that. After read some articles, I only found this middleware. But I got no luck. I cannot get a value from a key on one endpoint after I set it on another endpoint. So I didn’t use gin session and create my own middleware with gomemcache.

[code] package main

import ( “github.com/gin-gonic/gin” “github.com/bradfitz/gomemcache/memcache” )

func MCMiddleware(mc *memcache.Client) gin.HandlerFunc { return func(c *gin.Context) { c.Set(“mem”, mc) c.Next() } }

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

mc := memcache.New(“127.0.0.1:11211”)

r.Use(MCMiddleware(mc))

r.GET("/set", func(c *gin.Context) { mem, _ := c.MustGet(“mem”).(*memcache.Client) mem.Set(&memcache.Item{Key: “somekey”, Value: []byte(“somevalue”)}) c.String(200, “ok\n”) })

r.GET("/get", func(c *gin.Context) { mem, _ := c.MustGet(“mem”).(*memcache.Client) data, _ := mem.Get(“somekey”) c.String(200, string([]byte(data.Value))+"\n") })

r.Run(":8000") } [/code]

Then you can set and get a value from a key on all endpoints.

[code] linx@crawler ~ $ curl localhost:8000/set ok linx@crawler ~ $ curl localhost:8000/get somevalue [/code]