diff --git a/examples/cache.conf b/examples/cache.conf
new file mode 100644
index 0000000000000000000000000000000000000000..e910a05854632c664308a82fe1775fda5578c406
--- /dev/null
+++ b/examples/cache.conf
@@ -0,0 +1,72 @@
+proxy_cache_path /data/nginx/tmpcache levels=2:2 keys_zone=two:10m loader_threshold=300 
+                     loader_files=200 max_size=200m inactive=1m;
+
+server {
+	server_name cache.taohui.tech;
+
+	root html/;
+	error_log logs/cacherr.log debug;
+
+	location ~ /purge(/.*) {
+        	proxy_cache_purge two $scheme$1;
+    	}   
+
+	location /{
+		#expires @20h30m;
+		#if_modified_since off;
+		proxy_cache two;
+		proxy_cache_valid 200 1m;
+		add_header X-Cache-Status $upstream_cache_status;
+		#proxy_cache_use_stale error timeout updating;
+		#proxy_cache_key $scheme$uri;
+		#proxy_cache_revalidate on;
+		#proxy_cache_background_update on;
+		#proxy_hide_header      Set-Cookie;
+  		#proxy_ignore_headers   Set-Cookie;
+
+		#proxy_force_ranges on;
+
+		proxy_cache_key $scheme$uri;
+		proxy_pass http://localhost:8012;
+	}
+
+	listen 443 ssl; # managed by Certbot
+    	ssl_certificate examples/cert/a.crt;
+    	ssl_certificate_key examples/cert/a.key; 
+    	#include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
+    	#ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
+
+	ssl_verify_client  optional;
+	ssl_verify_depth 2;
+	#ssl_trusted_certificate examples/cert/ca.crt;
+	ssl_client_certificate examples/cert/ca.crt;
+	#ssl_client_certificate LetsEncryptAuthorityX3.crt;
+
+	location /test {
+		default_type text/plain;
+		return 200 '
+ssl_client_escaped_cert: $ssl_client_escaped_cert
+ssl_client_cert: $ssl_client_cert
+ssl_client_raw_cert: $ssl_client_raw_cert
+ssl_cipher: $ssl_cipher
+ssl_ciphers: $ssl_ciphers
+ssl_client_fingerprint: $ssl_client_fingerprint
+ssl_client_i_dn: $ssl_client_i_dn
+ssl_client_i_dn_legacy: $ssl_client_i_dn_legacy
+ssl_client_s_dn: $ssl_client_s_dn
+ssl_client_s_dn_legacy: $ssl_client_s_dn_legacy
+ssl_client_serial: $ssl_client_serial
+ssl_client_v_end: $ssl_client_v_end
+ssl_client_v_remain: $ssl_client_v_remain
+ssl_client_v_start: $ssl_client_v_start
+ssl_client_verify: $ssl_client_verify
+ssl_curves: $ssl_curves
+ssl_protocol: $ssl_protocol
+ssl_server_name: $ssl_server_name
+ssl_session_id: $ssl_session_id
+ssl_session_reused: $ssl_session_reused
+';
+	}
+
+    listen 80; # managed by Certbot
+}
diff --git a/examples/grpc.conf b/examples/grpc.conf
new file mode 100644
index 0000000000000000000000000000000000000000..734a92a12acff83473b0273113ec50d177eb0e29
--- /dev/null
+++ b/examples/grpc.conf
@@ -0,0 +1,15 @@
+server {
+	server_name http2.taohui.tech;
+
+	root html;
+	location / {
+		grpc_pass localhost:50051;
+	}
+
+    listen 4431 http2; # managed by Certbot
+    ssl_certificate /etc/letsencrypt/live/http2.taohui.tech/fullchain.pem; # managed by Certbot
+    ssl_certificate_key /etc/letsencrypt/live/http2.taohui.tech/privkey.pem; # managed by Certbot
+    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
+    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
+
+}
diff --git a/examples/http2.conf b/examples/http2.conf
new file mode 100644
index 0000000000000000000000000000000000000000..b4d2fcb0258f3bbbbff25a279b98e1a80c13c718
--- /dev/null
+++ b/examples/http2.conf
@@ -0,0 +1,21 @@
+server {
+	server_name http2.taohui.tech;
+
+	root html;
+	location / {
+		http2_push /mirror.txt;
+		http2_push /video.mp4;
+	}
+
+	location /test {
+		add_header Link "</style.css>; as=style; rel=preload";
+		http2_push_preload on;
+	}
+
+    listen 4430 ssl http2; # managed by Certbot
+    ssl_certificate /etc/letsencrypt/live/http2.taohui.tech/fullchain.pem; # managed by Certbot
+    ssl_certificate_key /etc/letsencrypt/live/http2.taohui.tech/privkey.pem; # managed by Certbot
+    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
+    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
+
+}
diff --git a/examples/memcached.conf b/examples/memcached.conf
new file mode 100644
index 0000000000000000000000000000000000000000..4ec34178ca864015a0a48e719f3bb5b8b43adb81
--- /dev/null
+++ b/examples/memcached.conf
@@ -0,0 +1,11 @@
+server {
+	server_name memcached.taohui.tech;
+	#root html/;
+	default_type text/plain;
+
+	location /get {
+		set            $memcached_key "$arg_key";
+		#memcached_gzip_flag 2;
+		memcached_pass localhost:11211;
+	}
+}
diff --git a/examples/nextups.conf b/examples/nextups.conf
new file mode 100644
index 0000000000000000000000000000000000000000..535e6b0830c799e49540f386b5fc75cfe4b0efda
--- /dev/null
+++ b/examples/nextups.conf
@@ -0,0 +1,37 @@
+upstream nextups {
+	server 127.0.0.1:8013;
+	server 127.0.0.1:8011;
+}
+
+server {
+	server_name nextups.taohui.tech;
+	error_log  logs/myerror.log  debug;
+	#root html/;
+	default_type text/plain;
+	
+	error_page 500 /test1.txt;
+
+	location / {
+		proxy_pass http://nextups;
+	}
+
+	location /test {
+	}
+
+	location /error {
+		proxy_pass http://nextups;
+		proxy_connect_timeout 1s;
+		proxy_next_upstream error;
+	}
+
+	location /intercept {
+		proxy_intercept_errors on;
+		proxy_pass http://127.0.0.1:8013;
+	}
+
+	location /httperr {
+                proxy_next_upstream http_500;
+                proxy_pass http://nextups;
+        }
+
+}
diff --git a/examples/openfilecache.conf b/examples/openfilecache.conf
new file mode 100644
index 0000000000000000000000000000000000000000..7de3421b5d151b5c93dec1f58ca6c78defbfeb35
--- /dev/null
+++ b/examples/openfilecache.conf
@@ -0,0 +1,10 @@
+server {
+	listen 8092;
+	root html;
+	location / {
+		open_file_cache max=10 inactive=60s;
+		open_file_cache_min_uses 1; 
+		open_file_cache_valid 60s; 
+		open_file_cache_errors on;
+	}
+}
diff --git a/examples/proxy.conf b/examples/proxy.conf
index 52679a37d90e07daf305e269623d0bf608bf4061..11c4dc314ed1f77ac43eede96c3c546636575c57 100644
--- a/examples/proxy.conf
+++ b/examples/proxy.conf
@@ -1,21 +1,34 @@
-upstream proxyups {
+upstream proxyupstream {
 	server 127.0.0.1:8012 weight=1;
 }
 
 server {
 	server_name proxy.taohui.tech;
-	error_log myerror.log info;
+	error_log logs/myerror.log debug;
 
-	location /a {
-		proxy_pass http://proxyups/www;
-		proxy_method POST;
-		proxy_pass_request_headers off;
+	location / {
+		proxy_pass http://proxyupstream;
+		#proxy_method POST;
+
+		proxy_hide_header aaa;
+		proxy_pass_header server;
+		proxy_ignore_headers X-Accel-Limit-Rate;
+
+		#proxy_pass_request_headers off;
 		#proxy_pass_request_body off;
-		proxy_set_body 'hello world!';
-		proxy_set_header name '';
+		#proxy_set_body 'hello world!';
+		#proxy_set_header name '';
 		proxy_http_version 1.1;
         	proxy_set_header Connection "";
 	}
+
+    listen 80; # managed by Certbot
+
+    listen 443 ssl; # managed by Certbot
+    ssl_certificate /etc/letsencrypt/live/proxy.taohui.tech/fullchain.pem; # managed by Certbot
+    ssl_certificate_key /etc/letsencrypt/live/proxy.taohui.tech/privkey.pem; # managed by Certbot
+    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
+    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
 }
 
 
diff --git a/examples/slice.conf b/examples/slice.conf
new file mode 100644
index 0000000000000000000000000000000000000000..f7e3358d9a332f4272759ecda5605118d71d7960
--- /dev/null
+++ b/examples/slice.conf
@@ -0,0 +1,24 @@
+proxy_cache_path /data/nginx/tmpcache3 levels=2:2 keys_zone=three:10m loader_threshold=300 
+                     loader_files=200 max_size=200m inactive=1m;
+
+server {
+	server_name slice.taohui.tech;
+
+	error_log logs/cacherr.log debug;
+
+	location ~ /purge(/.*) {
+                proxy_cache_purge three $1$is_args$args$slice_range;
+        }
+
+	location /{
+		proxy_cache three;
+		slice             1m;
+		proxy_cache_key   $uri$is_args$args$slice_range;
+    		proxy_set_header  Range $slice_range;
+
+		proxy_cache_valid 200 206 1m;
+		add_header X-Cache-Status $upstream_cache_status;
+
+		proxy_pass http://localhost:8012;
+	}
+}
diff --git a/examples/store.conf b/examples/store.conf
new file mode 100644
index 0000000000000000000000000000000000000000..810dfe84768e12e1399fc939ead1acc8bf046dfa
--- /dev/null
+++ b/examples/store.conf
@@ -0,0 +1,19 @@
+upstream proxyups {
+	server 127.0.0.1:8012 weight=1;
+}
+
+server {
+	server_name store.taohui.tech;
+	error_log logs/myerror.log debug;
+	root /tmp;
+
+	location / {
+		proxy_pass http://proxyups;
+		proxy_store        on;
+    		proxy_store_access user:rw group:rw all:r;
+	}
+
+    listen 80; # managed by Certbot
+}
+
+
diff --git a/examples/stream.conf b/examples/stream.conf
new file mode 100644
index 0000000000000000000000000000000000000000..4beac21c56cf75ee667cea3e6b433b180465f25c
--- /dev/null
+++ b/examples/stream.conf
@@ -0,0 +1,7 @@
+stream {
+        server {
+                listen 10001;
+                return 'hello, $remote_addr!\n';
+        }
+}
+
diff --git a/examples/streamups.conf b/examples/streamups.conf
new file mode 100644
index 0000000000000000000000000000000000000000..deccaa6c35fab064967320ad22fbd2f08cf62447
--- /dev/null
+++ b/examples/streamups.conf
@@ -0,0 +1,40 @@
+stream {
+	log_format basic '$remote_addr [$time_local] '
+                 '$protocol $status $bytes_sent $bytes_received '
+                 '$session_time';
+
+	error_log logs/stream_error.log debug;
+	access_log logs/stream_access.log basic;
+	server {
+		listen 10002 proxy_protocol;
+		return '10002 server get ip: $remote_addr!\n';
+	}
+
+	server {
+		listen 10003 proxy_protocol;
+		return '10003 server get ip: $remote_addr!\n';
+        }
+
+	server {
+		#listen 10004;
+		listen 10004 proxy_protocol;
+		set_real_ip_from 127.0.0.1;
+		allow 202.112.144.236;
+		deny all;
+		return '10004 vars:
+bytes_received: $bytes_received
+bytes_sent: $bytes_sent
+proxy_protocol_addr: $proxy_protocol_addr
+proxy_protocol_port: $proxy_protocol_port
+remote_addr: $remote_addr
+remote_port: $remote_port
+realip_remote_addr: $realip_remote_addr
+realip_remote_port: $realip_remote_port
+server_addr: $server_addr
+server_port: $server_port
+session_time: $session_time
+status: $status
+protocol: $protocol
+';
+	}
+}
diff --git a/examples/upserver.conf b/examples/upserver.conf
new file mode 100644
index 0000000000000000000000000000000000000000..33090e24bb7881e1c2e8d0299938f7bc751308da
--- /dev/null
+++ b/examples/upserver.conf
@@ -0,0 +1,39 @@
+server {
+        listen 127.0.0.1:8011;
+	default_type text/plain;
+	limit_rate 1;
+        return 200 '8011 server response.\n';
+}
+
+server {
+        listen 8013;
+        default_type text/plain;
+        return 500 '8013 Server Internal Error.\n';
+}
+
+server {
+        listen 8012;
+	default_type text/plain;
+	#client_body_in_single_buffer on;
+	#add_header Cache-Control 'max-age=3,stale-while-revalidate=3';
+	#add_header Vary *;
+	#add_header X-Accel-Expires 3;
+	root html;
+
+	location / {
+		#add_header aaa 'aaa value';
+		#add_header X-Accel-Limit-Rate 10;
+	}
+
+	location /test {
+        	return 200 '8012 server response.
+uri: $uri
+method: $request_method
+request: $request
+http_name: $http_name
+curtime: $time_local
+\n';
+	}
+}
+
+	
diff --git a/examples/websocket.conf b/examples/websocket.conf
new file mode 100644
index 0000000000000000000000000000000000000000..0a8e18c8a560abadaf3945dc90f3e34acce20e57
--- /dev/null
+++ b/examples/websocket.conf
@@ -0,0 +1,23 @@
+server {
+	server_name websocket.taohui.tech;
+	#root html/;
+	default_type text/plain;
+	
+	access_log logs/ws.log;
+
+	location / {
+		proxy_http_version 1.1;
+    		proxy_set_header Upgrade $http_upgrade;
+    		proxy_set_header Connection "upgrade";
+		proxy_pass http://echo.websocket.org;
+	}
+
+    listen 80; # managed by Certbot
+
+    listen 443 ssl; # managed by Certbot
+    ssl_certificate /etc/letsencrypt/live/websocket.taohui.tech/fullchain.pem; # managed by Certbot
+    ssl_certificate_key /etc/letsencrypt/live/websocket.taohui.tech/privkey.pem; # managed by Certbot
+    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
+    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
+
+}