这是为AWS S3调用'ListObjects'时JSON输出的示例

{
    "Contents": [{
        "ETag": "9e2bc2894b23742b7bb688c646c6fee9",
        "Key": "DSC-0237.jpg",
        "LastModified": "2017-09-06 21:53:15 +0000 UTC",
        "Owner": {
            "DisplayName": "demo-user",
            "ID": "a9e2f170a6880f1d61852df8e523e88ca2a2b7abd093476cc93f1239ab5063c6"
        },
        "Size": 117904,
        "StorageClass": "STANDARD"
    }, {
        "ETag": "\"9e2bc2894b23742b7bb688c646c6fee9\"",
        "Key": "DSC-0238.jpg",
        "LastModified": "2017-09-06 21:52:24 +0000 UTC",
        "Owner": {
            "DisplayName": "demo-user",
            "ID": "a9e2f170a6880f1d61852df8e523e88ca2a2b7abd093476cc93f1239ab5063c6"
        },
        "Size": 117904,
        "StorageClass": "STANDARD"
    }, {
        "ETag": "\"9e2bc2894b23742b7bb688c646c6fee9\"",
        "Key": "DSC-0239.jpg",
        "LastModified": "2017-09-06 21:53:01 +0000 UTC",
        "Owner": {
            "DisplayName": "demo-user",
            "ID": "a9e2f170a6880f1d61852df8e523e88ca2a2b7abd093476cc93f1239ab5063c6"
        },
        "Size": 117904,
        "StorageClass": "STANDARD"
    }],
    "IsTruncated": false,
    "Marker": "",
    "MaxKeys": 5,
    "Name": "test-bucket-x011pp3",
    "Prefix": ""
}

如何在Go中解析?我主要有兴趣收集:
  • 存储桶名称
  • 大小
  • 所有者的显示名称
  • LastModified

  • 我来自Python,在Python中,这将非常简单,例如:
    json_result = json.loads(json_string)
    bucket_name = json_result['Name']
    for idx, obj in enumerate(json_result['Contents']):
        key = obj['Key']
        size = obj['Size']
        lastmod = obj['LastModified']
        owner= obj['Owner']['DisplayName']
    

    感谢您的帮助!

    最佳答案

    是这样的

    package main
    
    import (
        "bytes"
        "encoding/json"
        "fmt"
        "log"
    )
    
    var jsonData = []byte(`
    {
        "Contents": [{
            "ETag": "9e2bc2894b23742b7bb688c646c6fee9",
            "Key": "DSC-0237.jpg",
            "LastModified": "2017-09-06 21:53:15 +0000 UTC",
            "Owner": {
                "DisplayName": "demo-user",
                "ID": "a9e2f170a6880f1d61852df8e523e88ca2a2b7abd093476cc93f1239ab5063c6"
            },
            "Size": 117904,
            "StorageClass": "STANDARD"
        }, {
            "ETag": "\"9e2bc2894b23742b7bb688c646c6fee9\"",
            "Key": "DSC-0238.jpg",
            "LastModified": "2017-09-06 21:52:24 +0000 UTC",
            "Owner": {
                "DisplayName": "demo-user",
                "ID": "a9e2f170a6880f1d61852df8e523e88ca2a2b7abd093476cc93f1239ab5063c6"
            },
            "Size": 117904,
            "StorageClass": "STANDARD"
        }, {
            "ETag": "\"9e2bc2894b23742b7bb688c646c6fee9\"",
            "Key": "DSC-0239.jpg",
            "LastModified": "2017-09-06 21:53:01 +0000 UTC",
            "Owner": {
                "DisplayName": "demo-user",
                "ID": "a9e2f170a6880f1d61852df8e523e88ca2a2b7abd093476cc93f1239ab5063c6"
            },
            "Size": 117904,
            "StorageClass": "STANDARD"
        }],
        "IsTruncated": false,
        "Marker": "",
        "MaxKeys": 5,
        "Name": "test-bucket-x011pp3",
        "Prefix": ""
    }`,
    )
    
    type Response struct {
        Contents    []*Content
        IsTruncated bool
        Marker      string
        MaxKeys     int
        Name        string
        Prefix      string
    }
    
    type Content struct {
        ETag         string
        Key          string
        LastModified string
        Owner        *Owner
        Size         int
        StroageClass string
    }
    
    type Owner struct {
        DisplayName string
        ID          string
    }
    
    func main() {
        resp := &Response{}
    
        if err := json.NewDecoder(bytes.NewBuffer(jsonData)).Decode(resp); err != nil {
            log.Fatal(err)
        }
    
        fmt.Printf("%#v", resp)
    }
    

    Go Playground中尝试

    你应该读这个https://golang.org/pkg/encoding/json/

    08-07 21:12