我正在尝试使用HTTP协议获取OrientDb
数据库列表。但我无法获得预期的响应,我可以在浏览器中获得。
如果我在浏览器地址行http://localhost:2480/listDatabases
输入,那么我有
响应:
{"@type":"d","@version":0,"databases":["MaximDB","GratefulDeadConcerts"],"@fieldTypes":"databases=e"}
如何使用golang
获得相同的内容?
我的代码:
package main
import (
"encoding/json"
"fmt"
"net/http"
)
func main() {
client := &http.Client{}
req, err := http.NewRequest("GET", "http://localhost:2480/listDatabases", nil)
req.SetBasicAuth("root", "1")
resp, err := client.Do(req)
if err != nil {
fmt.Printf("Error : %s", err)
}
fmt.Println("resp")
fmt.Println(ToJson(resp))
}
func ToJson(obj interface{}) string {
b, err := json.MarshalIndent(&obj, "", " ")
if err != nil {
fmt.Printf("Error : %s", err)
}
strJson := string(b)
return strJson
}
它在控制台中输出:
resp
{
"Status": "200 OK",
"StatusCode": 200,
"Proto": "HTTP/1.1",
"ProtoMajor": 1,
"ProtoMinor": 1,
"Header": {
"Connection": [
"Keep-Alive"
],
"Content-Type": [
"application/json; charset=utf-8"
],
"Date": [
"Fri Jun 05 22:19:23 MSK 2015"
],
"Etag": [
"0"
],
"Server": [
"OrientDB Server v.2.0.10 (build UNKNOWN@r; 2015-05-25 16:48:43+0000)"
],
"Set-Cookie": [
"OSESSIONID=-; Path=/; HttpOnly"
]
},
"Body": {},
"ContentLength": -1,
"TransferEncoding": null,
"Close": false,
"Trailer": null,
"Request": {
"Method": "GET",
"URL": {
"Scheme": "http",
"Opaque": "",
"User": null,
"Host": "localhost:2480",
"Path": "/listDatabases",
"RawQuery": "",
"Fragment": ""
},
"Proto": "HTTP/1.1",
"ProtoMajor": 1,
"ProtoMinor": 1,
"Header": {
"Authorization": [
"Basic cm9vdDox"
]
},
"Body": null,
"ContentLength": 0,
"TransferEncoding": null,
"Close": false,
"Host": "localhost:2480",
"Form": null,
"PostForm": null,
"MultipartForm": null,
"Trailer": null,
"RemoteAddr": "",
"RequestURI": "",
"TLS": null
},
"TLS": null
}
答案 0 :(得分:2)
您的请求很好,这是您尝试打印回复的方式。
您正在将整个响应对象编组到JSON,您可以看到"Body": {},
您身体缺失的位置。 *http.Response
不会按照您的方式编组JSON。这是因为Body
字段不仅仅是string
或[]bytes
,而是io.ReadCloser
,JSON编组代码不会调用.Read
它
尝试其中一个来获取响应正文
var b bytes.Buffer
_, err = b.ReadFrom(resp.Body)
if err != nil {
log.Fatal("Error : %s", err)
}
fmt.Println(b.String())
或
contents, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Fatal("Error : %s", err)
}
fmt.Println(string(contents))
或者要获得额外的响应元信息,您可以执行此操作
dump, err := httputil.DumpResponse(resp, true)
if err != nil {
log.Fatal("Error : %s", err)
}
fmt.Println(string(dump))
(true
表示包含正文的第二个标记,否则只会显示状态和标题)