如何使用Spotify SDK和Swift 3正确处理令牌刷新。错误代码= 3840 [英] How to properly handle token refresh with Spotify SDK and Swift 3. Error Code=3840

问题描述

tl; dr 我收到了： JSON文本没有以数组或对象开头，并且选项允许未设置片段。如果我正在尝试接收令牌并且会话中没有可用的刷新令牌！如果我正在尝试续订令牌。

我正在尝试为Swift 3中的Objective-C Spotify iOS SDK beta-25设置令牌刷新。我正在使用Heroku服务器和Spotify提供的Ruby脚本，更改为我的凭据。

  require'sinatra'
 require'net / http '
需要'net / https'
需要'base64'
需要'encrypted_strings'
需要'json'
 
 CLIENT_ID = ENV ['xxx' ] 
 CLIENT_SECRET = ENV ['xxx'] 
 ENCRYPTION_SECRET = ENV ['xxx'] 
 CLIENT_CALLBACK_URL = ENV ['xxx：// returnafterlogin'] 
 AUTH_HEADER =Basic + Base64.strict_encode64（CLIENT_ID +：+ CLIENT_SECRET）
 SPOTIFY_ACCOUNTS_ENDPO INT = URI.parse（https://accounts.spotify.com）
 
 get'/'do 
Working
 end 
 
 post'/ swap'do 
 
＃这个调用需要一个POST参数，code，
＃它与你的客户ID，秘密和回调结合
＃URL从Spotify Auth服务获取OAuth令牌，
＃它将在JSON有效负载中传递回调用者。 
 
 auth_code = params [：code] 
 
 http = Net :: HTTP.new（SPOTIFY_ACCOUNTS_ENDPOINT.host，SPOTIFY_ACCOUNTS_ENDPOINT.port）
 http.use_ssl = true 
 
 request = Net :: HTTP :: Post.new（/ api / token）
 
 request.add_field（Authorization，AUTH_HEADER）
 
 request.form_data = {
grant_type=> authorization_code，
redirect_uri=> CLIENT_CALLBACK_URL，
code=> auth_code 
} 
 
 response = http.request（request）
 
＃在转发到客户端之前加密刷新令牌
 if response.code.to_i == 200 
 token_data = JSON.parse（response.body）
 refresh_token = token_data [refresh_token] 
 encrypted_token = refresh_token.encrypt（：symmetric，：password => ENCRYPTION_SECRET）
 token_data [refresh_token] = encrypted_token 
 response.body = JSON.dump（token_data）
 end 
 
 status response.code.to_i 
返回响应.body 
 end 
 
 post'/ refresh'do 
 
＃使用POST请求新的访问令牌：ed刷新令牌
 
 http = Net :: HTTP.new（SPOTIFY_ACCOUNTS_ENDPOINT.host，SPOTIFY_ACCOUNTS_ENDPOINT.port）
 http.use_ssl = true 
 
 request = Net :: HTTP :: Post.new（/ api /令牌）
 
 request.add_field（授权，AUTH_HEADER）
 
 encrypted_token = params [：refr esh_token] 
 refresh_token = encrypted_token.decrypt（：symmetric，：password => ENCRYPTION_SECRET）
 
 request.form_data = {
grant_type=> refresh_token，
refresh_token=> refresh_token 
} 
 
 response = http.request（request）
 
 status response.code.to_i 
 return response.body 
 
结束
  

设置：

  SPTAuth.defaultInstance（）。tokenSwapURL = URL（字符串：SpotifyCredentials.tokenSwapURLSwap）
 SPTAuth.defaultInstance（）。tokenRefreshURL = URL（字符串：SpotifyCredentials.tokenSwapURLRefresh）
  

现在用户无法再登录了，我收到了错误。如果我要删除 tokenSwapURL 和 tokenRefreshURL ，一切都会再次起作用，但用户必须每60分钟重新验证一次。

如果我正在尝试使用已登录的用户刷新令牌，我会收到：

会话中没有可用的刷新令牌！

 如果SPTAuth.defaultInstance（）。session！= nil {
 print（needs login）
 SPTAuth.defaultInstance（）。renewsSession（SPTAuth.defaultInstance） （）.session，callback：{error，session in 
 if error！= nil {
 print（\（error？.localizedDescription））//会话中没有可用的刷新令牌！ 
返回
} 
}）
} 
  

我错过了什么？非常感谢帮助。

解决方案

我已经能够使用以下Git为Spotify创建令牌刷新服务：

我试图与之联系该项目的作者，但他无法告诉我，为什么我的方法不起作用，但他的方法。所有我可以留下的是这个工作部署到Heroku 链接。

tl;dr I'm receiving: JSON text did not start with array or object and option to allow fragments not set. if i'm trying to receive a token and No refresh token available in the session! if I'm trying to renew a token.

I'm trying to setup the token refresh for the Objective-C Spotify iOS SDK beta-25 in Swift 3. I'm using a Heroku Server and the Ruby script provided by Spotify, changed to my credentials.

require 'sinatra'
require 'net/http'
require 'net/https'
require 'base64'
require 'encrypted_strings'
require 'json'

CLIENT_ID = ENV['xxx']
CLIENT_SECRET = ENV['xxx']
ENCRYPTION_SECRET = ENV['xxx']
CLIENT_CALLBACK_URL = ENV['xxx://returnafterlogin']
AUTH_HEADER = "Basic " + Base64.strict_encode64(CLIENT_ID + ":" + CLIENT_SECRET)
SPOTIFY_ACCOUNTS_ENDPOINT = URI.parse("https://accounts.spotify.com")

get '/' do
"Working"    
end

post '/swap' do

    # This call takes a single POST parameter, "code", which
    # it combines with your client ID, secret and callback
    # URL to get an OAuth token from the Spotify Auth Service,
    # which it will pass back to the caller in a JSON payload.

    auth_code = params[:code]

    http = Net::HTTP.new(SPOTIFY_ACCOUNTS_ENDPOINT.host, SPOTIFY_ACCOUNTS_ENDPOINT.port)
    http.use_ssl = true

    request = Net::HTTP::Post.new("/api/token")

    request.add_field("Authorization", AUTH_HEADER)

    request.form_data = {
        "grant_type" => "authorization_code",
        "redirect_uri" => CLIENT_CALLBACK_URL,
        "code" => auth_code
    }

    response = http.request(request)

    # encrypt the refresh token before forwarding to the client
    if response.code.to_i == 200
        token_data = JSON.parse(response.body)
        refresh_token = token_data["refresh_token"]
        encrypted_token = refresh_token.encrypt(:symmetric, :password => ENCRYPTION_SECRET)
        token_data["refresh_token"] = encrypted_token
        response.body = JSON.dump(token_data)
    end

    status response.code.to_i
    return response.body
end

post '/refresh' do

    # Request a new access token using the POST:ed refresh token

    http = Net::HTTP.new(SPOTIFY_ACCOUNTS_ENDPOINT.host, SPOTIFY_ACCOUNTS_ENDPOINT.port)
    http.use_ssl = true

    request = Net::HTTP::Post.new("/api/token")

    request.add_field("Authorization", AUTH_HEADER)

    encrypted_token = params[:refresh_token]
    refresh_token = encrypted_token.decrypt(:symmetric, :password => ENCRYPTION_SECRET)

    request.form_data = {
        "grant_type" => "refresh_token",
        "refresh_token" => refresh_token
    }

    response = http.request(request)

    status response.code.to_i
    return response.body

end

Set by:

SPTAuth.defaultInstance().tokenSwapURL = URL(string: SpotifyCredentials.tokenSwapURLSwap)
SPTAuth.defaultInstance().tokenRefreshURL = URL(string: SpotifyCredentials.tokenSwapURLRefresh)

Now the user is not able to login anymore and I'm receiving the error posted on top. If I'm deleting tokenSwapURL and tokenRefreshURL, everything works again, but the User has to re-auth every 60 minutes.

If I'm trying to refresh the Token with an already logged in user, I receive:

"No refresh token available in the session!"

if SPTAuth.defaultInstance().session != nil {
        print("needs login")
        SPTAuth.defaultInstance().renewSession(SPTAuth.defaultInstance().session, callback: { error, session in
            if error != nil {
                print("\(error?.localizedDescription)") // "No refresh token available in the session!"
                return
            }
        })
}

What am I missing? Help is very appreciated.

解决方案

I have been able to create a token refresh service for Spotify with the following Git:

https://github.com/adamontherun/SpotifyTokenRefresh

All you need to do is to follow the instructions of the Heroku link within the git project.

I have tried to get in contact with the author of the project, but he wasn't able to tell me, why my approach wasn't working but his is. All I can leave you with is this working Deploy to Heroku link.

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