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.

我正在尝试在 Swift 3 中为 Objective-C Spotify iOS SDK beta-25 设置 token 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'
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

设置者:

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

现在用户无法再登录，我收到了顶部发布的错误。如果我要删除 tokenSwapURL 和 tokenRefreshURL，一切都会恢复正常，但用户必须每 60 分钟重新验证一次。

如果我尝试使用已登录的用户刷新 token ，我会收到:

"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
            }
        })
}

我错过了什么？非常感谢您的帮助。

最佳答案

我已经能够使用以下 Git 为 Spotify 创建 token 刷新服务:

https://github.com/adamontherun/SpotifyTokenRefresh

您需要做的就是按照 git 项目中 Heroku 链接的说明进行操作。

我试图与该项目的作者取得联系，但他无法告诉我，为什么我的方法行不通而他的方法行得通。我能留给你的就是这个有效的 Deploy to Heroku 链接。

关于ios - 如何使用 Spotify SDK 和 Swift 3 正确处理 token 刷新。错误代码=3840，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40813928/