恐慌：運行時錯誤：無效的內存地址或零指針解除引用

我目前正在使用Soundcloud包裝Go，我想打印用戶的追隨者，但這是我第一次遇到指針問題。恐慌：運行時錯誤：無效的內存地址或零指針解除引用

建設誤差

panic: runtime error: invalid memory address or nil pointer dereference 
[signal 0xb code=0x1 addr=0x10 pc=0xc9c26]

代碼

package main 

import (
    "fmt" 
    "github.com/njasm/gosoundcloud" 
) 


func main() { 
    // callback url is optional - nil in example 
    s, _ := gosoundcloud.NewSoundcloudApi("Client_Id", "Client_Secret", nil) 
    var userID uint64 = 1 
    member, err := s.GetUser(userID) 
    if err != nil { 
       panic(err) 
    } 
    fmt.Println(member.Followers) 
}

建設

goroutine 1 [running]: 
panic(0x3508c0, 0xc82000a0b0) 
    /usr/local/go/src/runtime/panic.go:481 +0x3e6 
net/http.(*Client).doFollowingRedirects(0x0, 0xc8200d0000, 0x4611c8, 0x0, 0x0, 0x0) 
    /usr/local/go/src/net/http/client.go:429 +0x66 
net/http.(*Client).Do(0x0, 0xc8200d0000, 0x8, 0x0, 0x0) 
    /usr/local/go/src/net/http/client.go:188 +0xff 
github.com/njasm/gosoundcloud.(*SoundcloudApi).do(0xc8200c8720, 0xc8200d0000, 0xc820012f00, 0x0, 0x0) 
    /Users/ManuelDao/Documents/GoBot/src/github.com/njasm/gosoundcloud/soundcloud.go:217 +0x4b 
github.com/njasm/gosoundcloud.(*SoundcloudApi).Get(0xc8200c8720, 0xc820012f00, 0x22, 0x0, 0x1, 0x0, 0x0) 
    /Users/ManuelDao/Documents/GoBot/src/github.com/njasm/gosoundcloud/soundcloud.go:92 +0xe1 
github.com/njasm/gosoundcloud.(*SoundcloudApi).GetUser(0xc8200c8720, 0x1, 0x417a80, 0x0, 0x0) 
     /Users/ManuelDao/Documents/GoBot/src/github.com/njasm/gosoundcloud/soundcloud.go:276 +0xc6 
main.main() 
     /Users/ManuelDao/Documents/GoBot/src/GoBot/GoBot.go:24 +0x70 
exit status 2

來源

2016-05-15 Juanvulcano

我以前從未使用過該LIB後之後，但它看起來像你忘了自己的身份驗證。

s, _ := gosoundcloud.NewSoundcloudApi("Client_Id", "Client_Secret", nil) 
if err = s.PasswordCredentialsToken("[email protected]", "your_password"); err != nil { 
    // handle err 
}

也許這樣的事情？

來源

2016-05-15 01:26:45

不是真的，要獲取數據，它不應該有必要用api登錄。這裏有一個鏈接到圖書館https://godoc.org/github.com/njasm/gosoundcloud – Juanvulcano

嗯，我只是嘗試了你的確切例子，它失敗了相同的零指針錯誤。用'PasswordCredentialsToken'獲得令牌後，一切正常。我已經在https://github.com/njasm/gosoundcloud上檢查了這個例子 –

我插入了你的代碼，它告訴我沒有定義的錯誤，在Go中我比較新。你是怎麼處理這個錯誤的？ – Juanvulcano

恐慌：運行時錯誤：無效的內存地址或零指針解除引用

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