gosimple/oauth2和Google OAuth2

Question

我正在使用gosimple/oauth2包来处理用户的OAuth2登录。我对GitHub example code没有任何问题，它可以完美地工作并返回我想要的东西。

然而，我确实遇到了让它与谷歌协同工作的问题。我已经正确地定义了我的作用域(就我所能看到的而言)，并且我得到了一个令牌响应，但是一旦我输入它，应用程序就会在第68行死机。

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()
}

还有恐慌：

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

这是令人不快的一行：

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

如果能帮上忙，我将不胜感激。请注意，代码只是来自gosimple/oauth2代码库的修改后的示例代码，我正尝试在使用应用程序中的控制器方法包装此阶段之前对其进行调试。

全栈跟踪，如下所示：

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

..。并在令牌错误上强制出现恐慌：

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

Answer 1

这是由于库的令牌处理中的一个错误，我在作者处记录了这个错误，并在一天内修复了这个错误：https://bitbucket.org/gosimple/oauth2/commits/e8e925ffb2424645cceaa9534e0ed9a28e564a20