使用Fiddler获取OAuth2认证的access token时候返回502

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我这里Fiddler的Composer功能来获取OAuth2 认证的access token：

POST https://demo.luoyong.me/api/oauth2/token

Request Body:

grant_type=client_credentials&client_id=###################&client_secret=########

发现报错如下：

HTTP/1.1 502 Fiddler - Connection Failed
Date: Tue, 02 Apr 2019 02:08:43 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Cache-Control: no-cache, must-revalidate
Timestamp: 10:08:43.362

[Fiddler] The connection to 'demo.luoyong.me' failed. <br />System.Security.SecurityException Failed to negotiate HTTPS connection with server.fiddler.network.https&gt; HTTPS handshake to soa-demo.luoyong.me (for #2) failed. System.IO.IOException Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. &lt; An existing connection was forcibly closed by the remote host

这是咋回事呢？后来我找到一个 Some HTTPS sites are unaccessible when using Fiddler

Fabio 提的方法如下，我验证了有效，

I was able to fix it by enabling the TLS1.2 protocol which is not enabled by default for outgoing connections (Tools / Fiddler Options.. / HTTPS / click on protocols list)

我补充个截图如下,打开Fiddler的Options，设置HTTPS的协议Protocol支持 tls1.2：