gosimple/oauth2和Google OAuth2

Question

我正在使用gosimple/oauth2包來處理用戶的OAuth2登錄。我沒有任何問題，GitHub example code，它完美的作品，並返回我想要的。

但是，我有問題讓它與Google合作。我已經正確定義我的範圍（據我可以看到），而我得到令牌的響應，但一旦我進入它，在〜68行

package main 

import (
    "bitbucket.org/gosimple/oauth2" 
    "flag" 
    "fmt" 
    "io" 
    "log" 
    "os" 
) 

var (
    // Register new app at https://github.com/settings/applications and provide 
    // clientId (-id), clientSecret (-secret) and redirectURL (-redirect) 
    // as imput arguments. 
    clientId  = flag.String("id", "", "Client ID") 
    clientSecret = flag.String("secret", "", "Client Secret") 
    redirectURL = flag.String("redirect", "http://httpbin.org/get", "Redirect URL") 
    scopeURL  = flag.String("scope", "https://www.googleapis.com/auth/userinfo.profile", "Scope URL") 

    authURL = "https://accounts.google.com/o/oauth2/auth" 
    tokenURL = "https://www.googleapis.com/oauth2/v1/userinfo" 
    apiBaseURL = "https://www.googleapis.com/" 
) 

const startInfo = ` 
Register new app at https://github.com/settings/applications and provide 
-id, -secret and -redirect as input arguments. 
` 

func main() { 
    flag.Parse() 

    if *clientId == "" || *clientSecret == "" { 
     fmt.Println(startInfo) 
     flag.Usage() 
     os.Exit(2) 
    } 

    // Initialize service. 
    service := oauth2.Service(
     *clientId, *clientSecret, authURL, tokenURL) 
    service.RedirectURL = *redirectURL 
    service.Scope = *scopeURL 

    // Get authorization url. 
    aUrl := service.GetAuthorizeURL("") 
    fmt.Println("\n", aUrl) 

    // Open authorization url in default system browser. 
    //webbrowser.Open(url) 

    fmt.Printf("\nVisit URL and provide code: ") 
    code := "" 
    // Read access code from cmd. 
    fmt.Scanf("%s", &code) 
    // Get access token. 
    token, _ := service.GetAccessToken(code) 
    fmt.Println() 

    // Prepare resource request. 
    google := oauth2.Request(apiBaseURL, token.AccessToken) 
    google.AccessTokenInHeader = false 
    google.AccessTokenInHeaderScheme = "token" 
    //google.AccessTokenInURL = true 

    // Make the request. 
    apiEndPoint := "user" 
    googleUserData, err := google.Get(apiEndPoint) 
    if err != nil { 
     log.Fatal("Get:", err) 
    } 
    defer googleUserData.Body.Close() 

    fmt.Println("User info response:") 
    // Write the response to standard output. 
    io.Copy(os.Stdout, googleUserData.Body) 

    fmt.Println() 
} 

以及緊急申請恐慌：

panic: runtime error: invalid memory address or nil pointer dereference [signal 0xb code=0x1 addr=0x0 pc=0x2341]

這是有問題的行：

google := oauth2.Request(apiBaseURL, token.AccessToken)

我會很感激的幫助得到這個工作。請注意，該代碼只是gosimple/oauth2回購協議中的修改示例代碼我試圖調試此階段，然後將其與控制器方法一起包裝到我的應用程序中。

完整的堆棧跟蹤如下：

panic: runtime error: invalid memory address or nil pointer dereference 
[signal 0xb code=0x1 addr=0x0 pc=0x2341] 

goroutine 1 [running]: 
main.main() 
     /Users/matt/Desktop/tests/google_demo.go:68 +0x341 

goroutine 2 [syscall]: 

goroutine 5 [runnable]: 
net/http.(*persistConn).readLoop(0xc2000bd100) 
     /usr/local/Cellar/go/1.1/src/pkg/net/http/transport.go:761 +0x64b 
created by net/http.(*Transport).dialConn 
     /usr/local/Cellar/go/1.1/src/pkg/net/http/transport.go:511 +0x574 

goroutine 6 [select]: 
net/http.(*persistConn).writeLoop(0xc2000bd100) 
     /usr/local/Cellar/go/1.1/src/pkg/net/http/transport.go:774 +0x26f 
created by net/http.(*Transport).dialConn 
     /usr/local/Cellar/go/1.1/src/pkg/net/http/transport.go:512 +0x58b 

...並迫使恐慌令牌上的錯誤：

panic: No access token found, response: [78 111 116 32 70 111 117 110 100]

Answer 1

這是由於在圖書館的令牌處理錯誤，我和作者一起登錄並在一天內修復：https://bitbucket.org/gosimple/oauth2/commits/e8e925ffb2424645cceaa9534e0ed9a28e564a20