与JSON一起使用Steam Rest API

Question

我目前正在开展关于Golang的教育项目，并使用Steam RESTAPI来检索玩家的CounterStrike（CS：GO）库存。

花费大量的时间后，这是我已经能够获得进展：

1）调用包含ID返回JSON消息，他们的库存用户的URL的请求（但JSON是有点棘手这就是我遇到的麻烦）。

2）我需要遍历JSON的rgDescriptions部分。

3）我已经构建了下面的代码（位于低了下去）穿过rgDescription循环，但是我不确定如何再得到它里面一切的价值。

代码：

var data map[string]interface{} 
r, err := myClient.Get("http://steamcommunity.com/profiles/" + id + "/inventory/json/730/2") 
detectErr(err) 
defer r.Body.Close() 

result, err := ioutil.ReadAll(r.Body) 
detectErr(err) 

err = json.Unmarshal(result, &data) 
detectErr(err) 
myMap := data["rgDescriptions"] 
v := reflect.ValueOf(myMap) 
for _, key := range v.MapKeys() { 
    value := v.MapIndex(key) 
    fmt.Println(key, "-", value) 
    //fmt.Println(reflect.ValueOf(value).MapIndex(varr[0])) // My idea for making this entire thing work, however it just spits out an error instead. :(
    fmt.Println("----------------\n") 
} 

上面的代码打印出的线沿线的东西：

1432174707_0 - map[classid:1432174707 market_hash_name:Revolver Case background_color: market_tradable_restriction:7 tags:[map[category_name:Type internal_name:CSGO_Type_WeaponCase name:Container category:Type] map[name:The Revolver Case Collection category:ItemSet category_name:Collection internal_name:set_community_10] map[internal_name:normal name:Normal category:Quality category_name:Category] map[category:Rarity color:b0c3d9 category_name:Quality internal_name:Rarity_Common name:Base Grade]] appid:730 instanceid:0 icon_url:-9a81dlWLwJ2UUGcVs_nsVtzdOEdtWwKGZZLQHTxDZ7I56KU0Zwwo4NUX4oFJZEHLbXU5A1PIYQNqhpOSV-fRPasw8rsUFJ5KBFZv668FFYwnfKfcG9HvN7iktaOkqD1auLTxD5SvZYgiLvFpo7xjVLh-kdrYWnzcoGLMlhpsyM-5vg market_name:Revolver Case type:Base Grade Container marketable:1 commodity:1 icon_drag_url: name:Revolver Case name_color:D2D2D2 tradable:1 descriptions:[map[type:html value: ] map[type:html value:Container Series #111 color:99ccff] map[type:html value: ] map[type:html value:Contains one of the following:] map[type:html value:R8 Revolver | Crimson Web color:4b69ff] map[type:html value:AUG | Ricochet color:4b69ff] map[type:html value:Desert Eagle | Corinthian color:4b69ff] map[value:P2000 | Imperial color:4b69ff type:html] map[type:html value:Sawed-Off | Yorick color:4b69ff] map[color:4b69ff type:html value:SCAR-20 | Outbreak] map[type:html value:PP-Bizon | Fuel Rod color:8847ff] map[type:html value:Five-SeveN | Retrobution color:8847ff] map[type:html value:Negev | Power Loader color:8847ff] map[type:html value:SG 553 | Tiger Moth color:8847ff] map[type:html value:Tec-9 | Avalanche color:8847ff] map[type:html value:XM1014 | Teclu Burner color:8847ff] map[type:html value:AK-47 | Point Disarray color:d32ce6] map[type:html value:G3SG1 | The Executioner color:d32ce6] map[type:html value:P90 | Shapewood color:d32ce6] map[type:html value:M4A4 | Royal Paladin color:eb4b4b] map[type:html value:R8 Revolver | Fade color:eb4b4b] map[value:or an Exceedingly Rare Special Item! color:ffd700 type:html] map[type:html value: ] map[color:00a000 app_data:map[limited:1] type:html value:]]] 

如果你想看到我在这里接受JSON的例子是示例网址。 http://steamcommunity.com/profiles/76561198096365603/inventory/json/730/2

所以最后，我需要弄清楚如何遍历值变量的内容。

任何帮助将不胜感激。 谢谢。

Answer 1

下面是一个工作示例。关键是要声明一个匹配你的JSON的结构类型。

由于密钥不一致，您需要为项目使用地图类型。

package main 

import (
    "encoding/json" 
    "fmt" 
    "log" 
    "net/http" 
) 

type Inventory struct { 
    Success  bool     `json:"success"` 
    Items  map[string]*Item  `json:"rgInventory"` 
    Descriptions map[string]*Description `json:"rgDescriptions"` 
} 

type Item struct { 
    ID   string `json:"id"` 
    ClassID string `json:"classid"` 
    InstanceID string `json:"instanceid"` 
    Amount  string `json:"amount"` 
    Pos  int `json:"pos"` 
} 

type Description struct { 
    Descriptions []struct { 
     Value string `json:"value"` 
    } `json:"descriptions"` 
} 

func main() { 
    res, err := http.Get("http://steamcommunity.com/profiles/76561198096365603/inventory/json/730/2") 
    if err != nil { 
     log.Fatal(err) 
    } 

    inventory := &Inventory{} 
    if err := json.NewDecoder(res.Body).Decode(&inventory); err != nil { 
     log.Fatal(err) 
    } 

    for _, item := range inventory.Descriptions { 
     for _, d := range item.Descriptions { 
      fmt.Printf(d.Value) 
     } 
    } 
}