我正在使用C＃（ASP.NET）。我想使用Google oauth访问我的应用中的用户个人资料详情。我成功获得了授权码，但在获取访问令牌时遇到了问题。
我更喜欢 谷歌教程。在教程中，我读到我必须发送请求并从谷歌获得响应。为此，我使用 System.Net.HttpWebRequest/HttpWebResponse （我是以正确的方式前进）。我用这个代码....
byte[] buffer = Encoding.ASCII.GetBytes("?code=" + code + "&client_id=xxx&client_secret=xxx&redirect_uri=xxxx&grant_type=authorization_code");
HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://accounts.google.com");
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = buffer.Length;
Stream strm = req.GetRequestStream();
strm.Write(buffer, 0, buffer.Length);
strm.Close();
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
Response.Write(((HttpWebResponse)resp).StatusDescription);
但是，我收到了错误：
远程服务器返回错误：（405）方法不允许。
更新：这里变量 code 是授权码。
我认为你正在向错误的端点发送POST请求，正确的是 https://accounts.google.com/o/oauth2/token
由于我在实施Google身份验证的过程中遇到了类似的问题，我将发布有效的代码..最后提到的问题：错误（400）错误的请求可能是由导致'？'引起的在上面的代码..
string codeClient = "code="+ t +"&client_id=number.apps.googleusercontent.com&";
string secretUri = "client_secret=yoursecret&" + "redirect_uri=path&"
+ "grant_type=authorization_code";
postString = codeClient + secretUri;
string url = "https://accounts.google.com/o/oauth2/token";
HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url.ToString());
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
UTF8Encoding utfenc = new UTF8Encoding();
byte[] bytes = utfenc.GetBytes(postString);
Stream os = null;
try
{
request.ContentLength = bytes.Length;
os = request.GetRequestStream();
os.Write(bytes, 0, bytes.Length);
}
catch
{ }
try
{
HttpWebResponse webResponse = (HttpWebResponse) request.GetResponse();
Stream responseStream = webResponse.GetResponseStream();
StreamReader responseStreamReader = new StreamReader(responseStream);
result = responseStreamReader.ReadToEnd();//parse token from result
我的代码正在运行，我在上面的两行中犯了错误。它应该是这样的
byte[] buffer = Encoding.ASCII.GetBytes("code=" + code + "&client_id=xxx&client_secret=xxx&redirect_uri=xxxx&grant_type=authorization_code");
HttpWebRequest req = (HttpWebRequest)WebRequest.Create("https://accounts.google.com/o/oauth2/token");
剩下的代码是正确的。
原始请求似乎有点过时了。但我发现Google的代码示例中包含许多“最佳实践”内务代码，这些代码很难与基本操作分开。
我最近发布了一个文档，它将所有REST操作表示为curl命令。在每种语言中都很难熟悉，但卷曲似乎是普遍的。大多数人都知道 - 否则，它很容易掌握。在我的卷曲例子中， -d flag表示POST操作。否则，参数将附加到URL。
http://www.tqis.com/eloquency/googlecalendar.htm
public string ReceiveTokenGmail(string code, string GoogleWebAppClientID, string GoogleWebAppClientSecret, string RedirectUrl)
{
string postString = "code=" + code + "&client_id=" + GoogleWebAppClientID + @"&client_secret=" + GoogleWebAppClientSecret + "&redirect_uri=" + RedirectUrl;
string url = "https://accounts.google.com/o/oauth2/token";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url.ToString());
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
UTF8Encoding utfenc = new UTF8Encoding();
byte[] bytes = utfenc.GetBytes(postString);
Stream os = null;
try
{
request.ContentLength = bytes.Length;
os = request.GetRequestStream();
os.Write(bytes, 0, bytes.Length);
}
catch
{ }
string result = "";
HttpWebResponse webResponse = (HttpWebResponse)request.GetResponse();
Stream responseStream = webResponse.GetResponseStream();
StreamReader responseStreamReader = new StreamReader(responseStream);
result = responseStreamReader.ReadToEnd();
return result;
}