我尝试使用Google API .NET客户端库从我的ASP.NET网络服务器访问购买状态API，这是使用Purchase API v1.1的推荐方法。但是，此API的Authorization page建议直接向Google的OAuth2网页发送网页请求，而不是使用相应的客户端库。
好的，我尝试了两种方法，包括我能想象到的所有变化，并且它们都导致＆＃34;远程服务器返回错误：（400）错误请求。＆＃34;。
现在我做了什么来达到我的观点。首先，我已在“授权”页面的“创建API控制台项目”下完成了所有步骤1-8。接下来，我生成了刷新令牌，如此处所述。在刷新令牌生成期间，我选择了与用于发布我的Android应用程序相同的Google帐户（现在处于已发布的测试版状态）。
接下来，我已经在Visual Studio中为测试目的创建了一个控制台C＃应用程序（可能是控制台应用程序出了问题吗？） 并尝试使用此代码调用Purchase API（在某些Google API示例中找到）：
private static void Main(string[] args)
{
var provider =
new WebServerClient(GoogleAuthenticationServer.Description)
{
ClientIdentifier = "91....751.apps.googleusercontent.com",
ClientSecret = "wRT0Kf_b....ow"
};
var auth = new OAuth2Authenticator<WebServerClient>(
provider, GetAuthorization);
var service = new AndroidPublisherService(
new BaseClientService.Initializer()
{
Authenticator = auth,
ApplicationName = APP_NAME
});
var request = service.Inapppurchases.Get(
PACKAGE_NAME, PRODUCT_ID, PURCHASE_TOKEN);
var purchaseState = request.Execute();
Console.WriteLine(JsonConvert.SerializeObject(purchaseState));
}
private static IAuthorizationState GetAuthorization(WebServerClient client)
{
IAuthorizationState state =
new AuthorizationState(
new[] {"https://www.googleapis.com/auth/androidpublisher"})
{
RefreshToken = "4/lWX1B3nU0_Ya....gAI"
};
// below is my redirect URI which I used to get a refresh token
// I tried with and without this statement
state.Callback = new Uri("https://XXXXX.com/oauth2callback/");
client.RefreshToken(state); // <-- Here we have (400) Bad request
return state;
}
然后我尝试使用此代码获取访问令牌（我在此处找到了它：Google Calendar API - Bad Request (400) Trying To Swap Code For Access Token）：
public static string GetAccessToken()
{
var request = WebRequest.Create(
"https://accounts.google.com/o/oauth2/token");
request.Method = "POST";
var postData =
string.Format(
@"code={0}&client_id={1}&client_secret={2}&redirect_uri={3}&grant_type=authorization_code",
// refresh token I got from browser
// also tried with Url encoded value
// 4%2FlWX1B3nU0_Yax....gAI
"4/lWX1B3nU0_Yax....gAI",
// ClientID from Google APIs Console
"919....1.apps.googleusercontent.com",
// Client secret from Google APIs Console
"wRT0Kf_bE....w",
// redirect URI from Google APIs Console
// also tried Url encoded value
// https%3A%2F%2FXXXXX.com%2Foauth2callback%2F
"https://XXXXX.com/oauth2callback/");
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;
using (var dataStream = request.GetRequestStream())
{
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
}
try
{
// request.GetResponse() --> (400) Bad request again!
using (var response = request.GetResponse())
{
using (var dataStream = response.GetResponseStream())
{
using (var reader = new StreamReader(dataStream))
{
var responseFromServer = reader.ReadToEnd();
var jsonResponse = JsonConvert.DeserializeObject<OAuth2Response>(responseFromServer);
return jsonResponse.access_token;
}
}
}
}
catch (Exception ex) { var x = ex; }
return null;
}
所以，总结我所有的长篇故事：
答案 0 :(得分：8)
我会尽力回答你的上一个问题。如果您访问自己的数据帐户，则无需在oAuth2中使用客户端ID。我们使用服务帐户访问Google Play API。
Google Developer Console＆gt;中创建服务帐户Your project＆gt; APIs and auth＆gt; Credentials＆gt; Create a new key。您将下载一个p12键。在API访问中将google api项目与您的Google Play帐户相关联
验证并尝试查询信息。我将尝试列出所有inapp项目。您只需更改即可获得购买状态
String serviceAccountEmail = "your-mail-in-developer-console@developer.gserviceaccount.com";
var certificate = new X509Certificate2(@"physical-path-to-your-key\key.p12", "notasecret", X509KeyStorageFlags.Exportable);
ServiceAccountCredential credential = new ServiceAccountCredential(
new ServiceAccountCredential.Initializer(serviceAccountEmail)
{
Scopes = new[] { "https://www.googleapis.com/auth/androidpublisher" }
}.FromCertificate(certificate));
var service = new AndroidPublisherService(
new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = "GooglePlay API Sample",
});
// try catch this function because if you input wrong params ( wrong token) google will return error.
var request = service.Inappproducts.List("your-package-name");
var purchaseState = request.Execute();
// var request = service.Purchases.Products.Get(
//"your-package-name", "your-inapp-item-id", "purchase-token"); get purchase'status
Console.WriteLine(JsonConvert.SerializeObject(purchaseState));
答案 1 :(得分：0)
你应该在你的身上做到以下几点 private static IAuthorizationState GetAuthorization（WebServerClient client）方法：
private IAuthorizationState GetAuthorization(WebServerClient client)
{
IAuthorizationState state = AuthState;
if (state != null)
{
return state;
}
state = new AuthorizationState()
{
RefreshToken = "4/lWX1B3nU0_Ya....gAI",
Callback = new Uri(@"https://XXXXX.com/oauth2callback/")
};
client.RefreshToken(state);
// Store and return the credentials.
HttpContext.Current.Session["AUTH_STATE"] = _state = state;
return state;
}