带有令牌身份验证的 Golang REST api 请求到 json 数组响应

Question

编辑这是工作代码，以防有人发现它有用。这个问题的标题最初是“How to parse a list fo dicts in golang”。

这是标题不正确，因为我引用了我在 python 中熟悉的术语。

package main

import (

    "encoding/json"

    "fmt"

    "io/ioutil"

    "log"

    "net/http"

)

//Regional Strut

type Region []struct {

    Region      string `json:"region"`

    Description string `json:"Description"`

    ID          int    `json:"Id"`

    Name        string `json:"Name"`

    Status      int    `json:"Status"`

    Nodes       []struct {

        NodeID    int    `json:"NodeId"`

        Code      string `json:"Code"`

        Continent string `json:"Continent"`

        City      string `json:"City"`

    } `json:"Nodes"`

}

//working request and response

func main() {

    url := "https://api.geo.com"

    // Create a Bearer string by appending string access token

    var bearer = "TOK:" + "TOKEN"

    // Create a new request using http

    req, err := http.NewRequest("GET", url, nil)

    // add authorization header to the req

    req.Header.Add("Authorization", bearer)

    //This is what the response from the API looks like

    //regionJson := `[{"region":"GEO:ABC","Description":"ABCLand","Id":1,"Name":"ABCLand [GEO-ABC]","Status":1,"Nodes":[{"NodeId":17,"Code":"LAX","Continent":"North America","City":"Los Angeles"},{"NodeId":18,"Code":"LBC","Continent":"North America","City":"Long Beach"}]},{"region":"GEO:DEF","Description":"DEFLand","Id":2,"Name":"DEFLand","Status":1,"Nodes":[{"NodeId":15,"Code":"NRT","Continent":"Asia","City":"Narita"},{"NodeId":31,"Code":"TYO","Continent":"Asia","City":"Tokyo"}]}]`

    //Send req using http Client

    client := &http.Client{}

    resp, err := client.Do(req)

    if err != nil {

        log.Println("Error on response.\n[ERROR] -", err)

    }

    defer resp.Body.Close()

    body, err := ioutil.ReadAll(resp.Body)

    if err != nil {

        log.Println("Error while reading the response bytes:", err)

    }

    var regions []Region

    json.Unmarshal([]byte(body), &regions)

    fmt.Printf("Regions: %+v", regions)

}

Answer 1

看看这个操场上的例子以获得一些指示。这是代码：package mainimport (    "encoding/json"    "log")func main() {    b := []byte(`[  {"key": "value", "key2": "value2"},  {"key": "value", "key2": "value2"}]`)    var mm []map[string]string    if err := json.Unmarshal(b, &mm); err != nil {        log.Fatal(err)    }    for _, m := range mm {        for k, v := range m {            log.Printf("%s [%s]", k, v)        }    }}我重新格式化了您包含的 API 响应，因为它不是有效的 JSON。在 Go 中，需要定义类型以匹配 JSON 模式。我不知道为什么 API 会附加%到结果的末尾，所以我忽略了这一点。如果包含它，您将需要在解组之前从文件中修剪结果。你从解组中得到的是一张地图。然后，您可以遍历切片以获取每个映射，然后遍历每个映射以提取keys 和 alues v。更新在您更新的问题中，您包含不同的 JSON 模式，并且此更改必须通过更新类型反映在 Go 代码中。您的代码中还有其他一些错误。根据我的评论，我鼓励你花一些时间学习这门语言。package mainimport (    "bytes"    "encoding/json"    "io/ioutil"    "log")// Response is a type that represents the API responsetype Response []Record// Record is a type that represents the individual records// The name Record is arbitrary as it is unnamed in the response// Golang supports struct tags to map the JSON properties// e.g. JSON "region" maps to a Golang field "Region"type Record struct {    Region      string `json:"region"`    Description string `json:"description"`    ID          int    `json:"id"`    Nodes       []Node}type Node struct {    NodeID int    `json:"NodeId`    Code   string `json:"Code"`}func main() {    // A slice of byte representing your example response    b := []byte(`[{        "region": "GEO:ABC",        "Description": "ABCLand",        "Id": 1,        "Name": "ABCLand [GEO-ABC]",        "Status": 1,        "Nodes": [{            "NodeId": 17,            "Code": "LAX",            "Continent": "North America",            "City": "Los Angeles"        }, {            "NodeId": 18,            "Code": "LBC",            "Continent": "North America",            "City": "Long Beach"        }]    }, {        "region": "GEO:DEF",        "Description": "DEFLand",        "Id": 2,        "Name": "DEFLand",        "Status": 1,        "Nodes": [{            "NodeId": 15,            "Code": "NRT",            "Continent": "Asia",            "City": "Narita"        }, {            "NodeId": 31,            "Code": "TYO",            "Continent": "Asia",            "City": "Tokyo"        }]    }]`)    // To more closely match your code, create a Reader    rdr := bytes.NewReader(b)    // This matches your code, read from the Reader    body, err := ioutil.ReadAll(rdr)    if err != nil {        // Use Printf to format strings        log.Printf("Error while reading the response bytes\n%s", err)    }    // Initialize a variable of type Response    resp := &Response{}    // Try unmarshaling the body into it    if err := json.Unmarshal(body, resp); err != nil {        log.Fatal(err)    }    // Print the result    log.Printf("%+v", resp)}