提取Referrer

提取Referrer

referrer 在反爬虫，及内容协商上有一定的意义。

package main

import (
    "github.com/kataras/iris"
    "github.com/kataras/iris/context"
)

func main() {
    app := iris.New()

    app.Get("/", func(ctx context.Context) /* 或者 iris.Context, 针对 Go 1.9+. */ {

        // 从请求头提取 "referer" 或 url 参数 "referer".
        r := ctx.GetReferrer()
        switch r.Type {
        case context.ReferrerSearch:
            ctx.Writef("Search %s: %s\n", r.Label, r.Query)
            ctx.Writef("Google: %s\n", r.GoogleType)
        case context.ReferrerSocial:
            ctx.Writef("Social %s\n", r.Label)
        case context.ReferrerIndirect:
            ctx.Writef("Indirect: %s\n", r.URL)
        }
    })

    app.Run(iris.Addr(":8080"))
}

CURL请求

curl http://localhost:8080?referer=https://twitter.com/Xinterio/status/1023566830974251008
curl http://localhost:8080?referer=https://www.google.com/search?q=Top+6+golang+web+frameworks&oq=Top+6+golang+web+frameworks