我有很多使用 Apache HttpClient 的代码，并且我想记录发出请求时正在协商的 TLS 版本。
这可能吗？
如果可能的话，我更喜欢一种不需要更改请求构建方式的方法 - 检查响应或查看日志或类似的东西？
根据我的评论，这似乎只有在我们在虚拟机级别调试 SSL 或使用自定义 SSLContext 时才有可能？
最佳答案
如果您打开 org.apache.http.conn.ssl 类别的调试级别日志记录，HttpClient 将记录有关所使用的 SSL session 的大量详细信息，包括 TLS/SSL 协议(protocol)版本。
[DEBUG] DefaultHttpClientConnectionOperator - Connecting to httpbin.org/54.225.150.40:443
[DEBUG] SSLConnectionSocketFactory - Connecting socket to httpbin.org/54.225.150.40:443 with timeout 0
[DEBUG] SSLConnectionSocketFactory - Enabled protocols: [TLSv1, TLSv1.1, TLSv1.2]
[DEBUG] SSLConnectionSocketFactory - Enabled cipher suites:[TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
[DEBUG] SSLConnectionSocketFactory - Starting handshake
[DEBUG] SSLConnectionSocketFactory - Secure session established
[DEBUG] SSLConnectionSocketFactory - negotiated protocol: TLSv1.2
[DEBUG] SSLConnectionSocketFactory - negotiated cipher suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
[DEBUG] SSLConnectionSocketFactory - peer principal: CN=httpbin.org
[DEBUG] SSLConnectionSocketFactory - peer alternative names: [httpbin.org, www.httpbin.org]
[DEBUG] SSLConnectionSocketFactory - issuer principal: CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US
[DEBUG] DefaultHttpClientConnectionOperator - Connection established 192.168.43.64:57534<->54.225.150.40:443
关于java - Apache HttpClient - 记录请求中协商的 TLS 版本？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49880630/