feat(proxy): add HTTP to HTTPS redirection support

conf/frpc_full_example.toml

@@ -275,6 +275,10 @@ localIP = "127.0.0.1"
 localPort = 8000
 subdomain = "web02"
 customDomains = ["web02.yourdomain.com"]
+# if true, frps will redirect plain HTTP requests for the domains above to HTTPS.
+# It requires vhostHTTPPort to be enabled on frps, and an HTTP proxy registered
+# on the same domain always takes precedence over the redirect.
+# httpRedirect = true
 # if not empty, frpc will use proxy protocol to transfer connection info to your local service
 # v1 or v2 or empty
 transport.proxyProtocolVersion = "v2"

conf/frps_full_example.toml

@@ -40,6 +40,12 @@ transport.maxPoolCount = 5
 # If negative, keep-alive probes are disabled.
 # transport.tcpKeepalive = 7200
 
+# proxyIdleTimeout specifies the maximum time in seconds that a proxied user connection
+# can stay open without any traffic in either direction before frps closes it.
+# It reclaims connections whose endpoints are still open at the TCP level but will never send data again.
+# By default, this value is 0, which disables the idle timeout.
+# transport.proxyIdleTimeout = 7200
+
 # transport.tls.force specifies whether to only accept TLS-encrypted connections. By default, the value is false.
 transport.tls.force = false
 
@@ -52,6 +58,12 @@ transport.tls.force = false
 vhostHTTPPort = 80
 vhostHTTPSPort = 443
 
+# Port used in the Location header when redirecting HTTP requests to HTTPS for
+# proxies with httpRedirect enabled. Set it when browsers reach the HTTPS vhost
+# through a port mapping, so it differs from vhostHTTPSPort.
+# By default, this value is vhostHTTPSPort.
+# vhostHTTPSRedirectPort = 443
+
 # Response header timeout(seconds) for vhost http server, default is 60s
 # vhostHTTPTimeout = 60