Question

我试图从API解析XML响应，当调用fmt.Println并传递响应正文时，我得到一个奇怪的字符串：

&{0xc8200e6140 {0 0} false <nil> 0xc2030 0xc1fd0}

我已经确认我可以curl API并按预期获取XML。（我也会收到与Postman Chrome扩展程序发送GET请求相同的回复。）这是编码问题吗？

以下是相关代码：

type Album struct {
    Title     string `xml:"album>name"`
    Artist    string `xml:"album>artist>name"`
    PlayCount uint64 `xml:"album>playcount"`
}

const lastFMAPIKey string = "<My api key>"
const APIURL string = "http://ws.audioscrobbler.com/2.0/"

func perror(err error) {
    if err != nil {
        panic(err)
    }
}

func getListeningInfo(url string) []byte {
    resp, err := http.Get(url)
    perror(err)
    defer resp.Body.Close()
    // this is the line that prints the string above
    fmt.Println(resp.Body)
    body, err2 := ioutil.ReadAll(resp.Body)
    perror(err2)
    return body
}

func main() {
    url := APIURL + "?method=user.getTopAlbums&user=iamnicholascox&period=1month&limit=1&api_key=" + lastFMAPIKey
    album := Album{}
    err := xml.Unmarshal(getListeningInfo(url), &album)
    perror(err)
    fmt.Printf(album.Artist)
}

作为参考，打印resp而不是resp.Body会产生以下结果：

{200 OK 200 HTTP/1.1 1 1 map[Ntcoent-Length:[871]
Connection:[keep-alive] Access-Control-Max-Age:[86400]
Cache-Control:[private] Date:[Thu, 03 Dec 2015 05:16:34 GMT]
Content-Type:[text/xml; charset=UTF-8]
Access-Control-Request-Headers:[Origin, X-Atmosphere-tracking-id, X-Atmosphere-Framework, X-Cache-Date,
Content-Type, X-Atmosphere-Transport, *]
Access-Control-Allow-Methods:[POST, GET, OPTIONS]
Access-Control-Allow-Origin:[*]
Server:[openresty/1.7.7.2]]
0xc8200f6040 -1 [] false map[] 0xc8200b8000 <nil>}

Answer 1

http.Response的正文是io.ReaderCloser。您看到的奇数输出是用作响应主体的结构字段的值。

如果您想要打印出实际内容，您必须先从Body中读取它。

通过执行以下操作来尝试ioutil。ReadAll：

b, err := ioutil.ReadAll(resp.Body) // b is a []byte here
if err != nil { 
   fmt.Println("Got error:",err)
} else {
    fmt.Println(string(b)) // convert []byte to string for printing to the screen.
}

Go：XML API返回奇怪编码的字符串

1 个答案: