利用go语言内置的各种网络包可以方便的进行web编程。本文章利用了csdn的开放API实现读取最新文章的需求。演示了go语言发起http get请求和json的umarshing特性。
@H_301_3@原文:小宇的博客
简单的http GET请求
go语言内置了
net/http
包,采用http.Get
能够方便的发起GET请求package main import ( "fmt" "io/IoUtil" "log" "net/http" ) func main() { resp,err := http.Get("http://api.csdn.net/blog/getnewarticlelist?client_id=????&page=1&size=10") if err != nil { log.Fatal(err) } contents,err := IoUtil.ReadAll(resp.Body) resp.Body.Close() if err != nil { log.Fatal(err) } fmt.Printf("%s",contents) }
看到返回的内容为json格式。
{"page":1,"count":12733,"size":10,"list":[{"ArticleId":52963517,"BlogId":5022393,"UserName":"u013410747","Title":"linux修改默认的编辑器","Description":"sudo select-editor 选择vim 搞定。。","PostTime":"\/Date(1477712141000)\/","UpdateTime":"\/Date(1477712177908)\/","Digg":0,"Bury":0,"ChannelId":2,"Type":1,"Status":0,"ViewCount":0,"CommentCount":0,"CommentAuth":2,"IsTop":false,"Level":0,"OutlinkCount":0,"Note":null,"IP":null,"Categories":null,"Tags":[],"ColumnAlias":null,"ColumnTitle":null,"MarkDownContent":null,"MarkDownDirectory":null,"ArticleEditType":0,"ArticleMore":null},...umnAlias":null,"ColumnTitle":null,"MarkDownContent":null,"MarkDownDirectory":null,"ArticleEditType":0,"ArticleMore":null}]}成功: 进程退出代码 0.
JSON转为内部结构体
那么如何把json格式的内容转为golang的内部结构体呢?这需要利用
json.Unmarshal
package main import ( "encoding/json" "fmt" "io/IoUtil" "log" "net/http" ) type Article struct { ArticleId int BlogId int UserName string Title string Description string PostTime string UpdateTime string ViewCount int CommentCount int Categories int ColumnAlias bool Url string } type Articles struct { Page int `json:"page,int"` Count int Size int List []*Article } func main() { resp,err := http.Get("http://api.csdn.net/blog/getnewarticlelist?client_id=????&page=0&size=20") if err != nil { log.Fatal(err) } str,err := IoUtil.ReadAll(resp.Body) resp.Body.Close() if err != nil { log.Fatal(err) } var contents Articles if err := json.Unmarshal(str,&contents); err != nil { log.Fatal("Json unmarshing Failed: ",err) } for k,v := range contents.List { fmt.Printf("%v. %v\n",k,v.Title) } }
最后,我们完成了用csdn的开放API实现读取最新文章的需求。
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原文链接:https://www.f2er.com/go/189186.html