Kenny Phong

Hi, Normal connection without proxy working perfectly. Using proxy (http://www.squid-cache.org/) will have problem, refer to attachments below. From my understanding, is persistent connection problem, but i can't figure out what is root cause. Appreciate for your help. Thanks. Note: i'm using Delphi 2006 with V8.61.

Normal connection without proxy is working fine. And i don't know what specific header lines needed. And for your information, i did try MyApp > Proxifier (https://www.proxifier.com/) > Squid > Server, working perfectly.

I change THttpCli to TSslHttpRest and on event OnHttpRestProg write Msg to log file. Below is what i get: 26/06/2019 09:20:25.378: Request completed: 200 OK And i try to get log using Web Client Demo in ICS sample. This is what i get: Connecting to: http://222.22.222.222:20000/[s123abc]Connect?&UseEncryption=1||| 09:26:47:360 State = httpNotConnected 09:26:47:367 Login 127.0.0.1 09:26:47:372 State = httpDnsLookup 09:26:47:380 Socket DNS Lookup Done - 127.0.0.1 09:26:47:386 State = httpDnsLookupDone 09:26:47:393 connect to 127.0.0.1/3128 09:26:47:403 024BA470 Socket handle created handle=732 09:26:47:415 TWSocket will connect to 127.0.0.1:3128 09:26:47:427 SessionConnected, error=0 to 127.0.0.1:3128 09:26:47:432 State = httpConnected Connected OK to: 127.0.0.1 (127.0.0.1) 09:26:47:447 State = httpWaitingHeader cmd> GET http://222.22.222.222:20000/[s123abc]Connect?&UseEncryption=1||| HTTP/1.0 cmd> Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */* cmd> Connection: Keep-Alive cmd> Accept-Language: en, fr cmd> User-Agent: Mozilla cmd> Host: 222.22.222.222:20000 cmd> Proxy-Connection: Keep-Alive 09:26:47:499 7 header lines to send GET http://222.22.222.222:20000/[s123abc]Connect?&UseEncryption=1||| HTTP/1.0 Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */* Connection: Keep-Alive Accept-Language: en, fr User-Agent: Mozilla Host: 222.22.222.222:20000 Proxy-Connection: Keep-Alive cmd> 09:26:47:511 024BA470 PutDataInSendBuffer handle=732 [1] Data:GET http://222.22.222.222:20000/[s123abc]Connect?&UseEncryption=1||| HTTP/1.0$0D $0A Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*$0D $0A Connection: Keep-Alive$0D $0A Accept-Language: en, fr$0D $0A User-Agent: Mozilla$0D $0A Host: 222.22.222.222:20000$0D $0A Proxy-Connection: Keep-Alive$0D $0A $0D $0A 09:26:47:517 SendRequest Done 09:26:47:523 024BA470 TriggerDataSent handle=732 09:26:47:528 024BA470 TriggerDataSent handle=732 09:26:47:537 Data available. Len=251 09:26:47:544 >|HTTP/1.1 200 OK| 09:26:47:549 FCloseReq=1 HTTP/1.1 200 OK 09:26:47:559 >|Server: ABCServer| Server: ABCServer 09:26:47:569 >|Date: Wed Jun 26 09:26:47 MYT 2019| Date: Wed Jun 26 09:26:47 MYT 2019 09:26:47:578 >|ClientAddr: 45.112.199.3| ClientAddr: 45.112.199.3 09:26:47:589 >|Content-Type: text/plain;charset=UTF-8| Content-Type: text/plain;charset=UTF-8 09:26:47:598 >|Content-Length: 0| Content-Length: 0 09:26:47:608 >|X-Cache: MISS from 12345-abc| X-Cache: MISS from 12345-abc 09:26:47:617 >|Via: 1.1 12345-abc (squid/3.5.28)| Via: 1.1 12345-abc (squid/3.5.28) 09:26:47:626 >|Connection: keep-alive| Connection: keep-alive 09:26:47:637 >|| 09:26:47:640 End of header 09:26:47:645 State = httpReady 09:26:47:651 PrepareNTLMAuth begin, FStatusCode = 200 FProxyAuthNTLMState=0 FAuthNTLMState=0 09:26:47:657 PrepareNTLMAuth end, FStatusCode = 200 FProxyAuthNTLMState=0 FAuthNTLMState=0 09:26:47:662 RequestDone Request done, StatusCode #200 hdr>HTTP/1.1 200 OK hdr>Server: ABCServer hdr>Date: Wed Jun 26 09:26:47 MYT 2019 hdr>ClientAddr: 45.112.199.3 hdr>Content-Type: text/plain;charset=UTF-8 hdr>Content-Length: 0 hdr>X-Cache: MISS from 12345-abc hdr>Via: 1.1 12345-abc (squid/3.5.28) hdr>Connection: keep-alive 09:26:55:870 State = httpClosing Reset SSL 09:26:55:880 024BA470 SocketCloseCalled handle=732 09:26:55:885 024BA470 TCustomWSocket.Shutdown 1 handle=732 09:26:55:891 SessionClosed Error: 0 09:26:55:897 State = httpReady 09:26:55:903 PrepareNTLMAuth begin, FStatusCode = 200 FProxyAuthNTLMState=0 FAuthNTLMState=0 09:26:55:907 PrepareNTLMAuth end, FStatusCode = 200 FProxyAuthNTLMState=0 FAuthNTLMState=0 09:26:55:914 RequestDone Request done, StatusCode #200 hdr>HTTP/1.1 200 OK hdr>Server: ABCServer hdr>Date: Wed Jun 26 09:26:47 MYT 2019 hdr>ClientAddr: 45.112.199.3 hdr>Content-Type: text/plain;charset=UTF-8 hdr>Content-Length: 0 hdr>X-Cache: MISS from 12345-abc hdr>Via: 1.1 12345-abc (squid/3.5.28) hdr>Connection: keep-alive Connecting to: http://222.22.222.222:20000/[s123abc]Sector?[FAST]=KL,SG,MY,SS,SZ,HK,N,O,JK,WIDX,BK,FX,NAR,NM||| 09:26:57:324 State = httpNotConnected 09:26:57:330 Login 127.0.0.1 09:26:57:335 State = httpDnsLookup 09:26:57:341 Socket DNS Lookup Done - 127.0.0.1 09:26:57:347 State = httpDnsLookupDone 09:26:57:354 connect to 127.0.0.1/3128 09:26:57:359 024BA470 Socket handle created handle=768 09:26:57:367 TWSocket will connect to 127.0.0.1:3128 09:26:57:378 SessionConnected, error=0 to 127.0.0.1:3128 09:26:57:384 State = httpConnected Connected OK to: 127.0.0.1 (127.0.0.1) 09:26:57:400 State = httpWaitingHeader cmd> GET http://222.22.222.222:20000/[s123abc]Sector?[FAST]=KL,SG,MY,SS,SZ,HK,N,O,JK,WIDX,BK,FX,NAR,NM||| HTTP/1.0 cmd> Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */* cmd> Connection: Keep-Alive cmd> Accept-Language: en, fr cmd> User-Agent: Mozilla cmd> Host: 222.22.222.222:20000 cmd> Proxy-Connection: Keep-Alive 09:26:57:456 7 header lines to send GET http://222.22.222.222:20000/[s123abc]Sector?[FAST]=KL,SG,MY,SS,SZ,HK,N,O,JK,WIDX,BK,FX,NAR,NM||| HTTP/1.0 Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */* Connection: Keep-Alive Accept-Language: en, fr User-Agent: Mozilla Host: 222.22.222.222:20000 Proxy-Connection: Keep-Alive cmd> 09:26:57:474 024BA470 PutDataInSendBuffer handle=768 [2] Data:GET http://222.22.222.222:20000/[s123abc]Sector?[FAST]=KL,SG,MY,SS,SZ,HK,N,O,JK,WIDX,BK,FX,NAR,NM||| HTTP/1.0$0D $0A Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*$0D $0A Connection: Keep-Alive$0D $0A Accept-Language: en, fr$0D $0A User-Agent: Mozilla$0D $0A Host: 222.22.222.222:20000$0D $0A Proxy-Connection: Keep-Alive$0D $0A $0D $0A 09:26:57:481 SendRequest Done 09:26:57:486 024BA470 TriggerDataSent handle=768 09:26:57:490 024BA470 TriggerDataSent handle=768 09:26:57:517 Data available. Len=261 09:26:57:521 >|HTTP/1.1 401 Unauthorized| 09:26:57:526 FCloseReq=1 HTTP/1.1 401 Unauthorized 09:26:57:537 >|Server: ABCServer| Server: ABCServer 09:26:57:547 >|Date: Wed Jun 26 09:26:57 MYT 2019| Date: Wed Jun 26 09:26:57 MYT 2019 09:26:57:558 >|ClientAddr: 45.112.199.3| ClientAddr: 45.112.199.3 09:26:57:569 >|Content-Type: text/plain;charset=UTF-8| Content-Type: text/plain;charset=UTF-8 09:26:57:581 >|Content-Length: 0| Content-Length: 0 09:26:57:593 >|X-Cache: MISS from 12345-abc| X-Cache: MISS from 12345-abc 09:26:57:605 >|Via: 1.1 12345-abc (squid/3.5.28)| Via: 1.1 12345-abc (squid/3.5.28) 09:26:57:617 >|Connection: keep-alive| Connection: keep-alive 09:26:57:626 >|| 09:26:57:633 End of header 09:26:57:640 State = httpReady 09:26:57:646 PrepareNTLMAuth begin, FStatusCode = 401 FProxyAuthNTLMState=0 FAuthNTLMState=0 09:26:57:652 PrepareNTLMAuth end, FStatusCode = 401 FProxyAuthNTLMState=0 FAuthNTLMState=0 09:26:57:657 RequestDone Request done, StatusCode #401 hdr>HTTP/1.1 401 Unauthorized hdr>Server: ABCServer hdr>Date: Wed Jun 26 09:26:57 MYT 2019 hdr>ClientAddr: 45.112.199.3 hdr>Content-Type: text/plain;charset=UTF-8 hdr>Content-Length: 0 hdr>X-Cache: MISS from 12345-abc hdr>Via: 1.1 12345-abc (squid/3.5.28) hdr>Connection: keep-alive 09:28:57:066 Data available. Len=0 09:28:57:088 **data available. Len=0 09:28:57:098 SessionClosed Error: 0 09:28:57:108 024BA470 SocketCloseCalled handle=768 09:28:57:115 024BA470 TCustomWSocket.Shutdown 1 handle=768

i changed it's properties it to Connection := 'Keep-Alive'; RequestVer := '1.1'; Request version became 1.1 but still failed.

The headers ICS sends with or without proxy, is the same.

I'm using THttpCli Proxy := ProxyServerAddress ProxyPort := ProxyServerPort Is non-SSL Yes, I asked for persistent connections. Screen dumps came from Wireshark. For screen 1, i was successfully signed in to server. And do GET was successfully in screen 2 and screen 3. Then before do POST in screen 4, i was disconnected and return invalid client. Please let me know if you need more information. Thanks.