返回第三方数据

package main

import (
    "github.com/gin-gonic/gin"
    "net/http"
)
//返回第三方获取的数据
func main() {
    router := gin.Default()

    router.GET("/someDataFromReader", func(c *gin.Context) {
        response, err := http.Get("https://rolingg.top/images/head.jpg")    //获取链接的指定数据
        if err != nil || response.StatusCode != http.StatusOK {    //错误反馈
            c.Status(http.StatusServiceUnavailable)    //如果有错反馈503码
            return
        }
        reader := response.Body    //获取数据的本体
        contentLength := response.ContentLength    //获取数据的长度
        contentType := response.Header.Get("Content-Type")    //获取数据的响应头内容

        extraHeaders := map[string]string{
            "Content-Disposition": `attachment; filename="header.png"`,    //自定义而外响应头数据
        }

        c.DataFromReader(http.StatusOK, contentLength, contentType, reader, extraHeaders)    //将前面的读取写入流中并更新http码(官方原句：DataFromReader writes the specified reader into the body stream and updates the HTTP code)
    })

    router.Run(":80")
}