안녕하세요.
스마트 클라이언트에 관해 쓰신 글을 읽고 회사 프로젝트에 적용해 개발중에 있습니다.

FarPoint사의 윈폼용 스프레드 컨트롤을 새로운 윈폼 컨트롤에 얹어 ASP.NET에서 사용중인데,
실제 웹서버에 사이트를 올리고 사용해보니,
셀을 이동할때마다 웹서버와 패킷을 송수신하여 성능이 급격히 떨어지는 문제가 발생했습니다.
네트워크 모니터로 모니터링해보니 셀을 이동할때 계속해서 웹서버와 패킷을 주고 받고 있었습니다.
짧은 소견으로는 스마트클라이언트와 웹서버간에 연결을 유지하기 위한 패킷으로도 생각되지만 잘 모르겠습니다.
웹페이지가 정상적으로 출력된 상태에서 오프라인을 시키면 당연히 웹서버와 패킷송수신이 없으므로
빠른속도록 셀 이동이나 편집이 가능해집니다.
하지만 다시 연결하면 패킷송수신이 시작되면서 속도가 급격히 떨어지구요.
조언 부탁드려요.


네트워크 모니터로 캡춰한 내용의 일부는 다음과 같습니다.

첫번째 유형:
클라이언트 -----------> 웹서버
    HTTP: GET Request (from client using port 3634)
    HTTP: Request Method = GET
    HTTP: Uniform Resource Identifier = /iexplore.exe.config
    HTTP: Protocol Version = HTTP/1.1
    HTTP: Accept = */*
    HTTP: Accept-Encoding = gzip, deflate
    HTTP: User-Agent = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR
    HTTP: Host = ***.***.***.***
    HTTP: Connection = Keep-Alive
    ....

웹서버 -----------> 클라이언트
    .....
    HTTP: Response (to client using port 3634)
    HTTP: Protocol Version = HTTP/1.1
    HTTP: Status Code = Not found
    HTTP: Reason = Object Not Found
    HTTP: Server = Microsoft-IIS/5.0
    HTTP: Date = Fri, 22 Jul 2005 04:23:28 GMT
    HTTP: Connection = close
    HTTP: Content-Length = 3937
    HTTP: Content-Type = text/html
    HTTP: Data: Number of data bytes remaining = 1297 (0x0511)
    .....

두번째 유형:
클라이언트 ------------> 웹서버

TCP: .A.R.., len: 0, seq:3986502330-3986502330, ack:3662085292, win: 0, src: 3634 dst: 80
    TCP: Source Port = 0x0E32
    TCP: Destination Port = Hypertext Transfer Protocol
    TCP: Sequence Number = 3986502330 (0xED9D32BA)
    TCP: Acknowledgement Number = 3662085292 (0xDA46FCAC)
    TCP: Data Offset = 20 (0x14)
    TCP: Reserved = 0 (0x0000)
    TCP: Flags = 0x14 : .A.R..
        TCP: ..0..... = No urgent data
        TCP: ...1.... = Acknowledgement field significant
        TCP: ....0... = No Push function
        TCP: .....1.. = Reset the connection
        TCP: ......0. = No Synchronize
        TCP: .......0 = No Fin
    TCP: Window = 0 (0x0)
    TCP: Checksum = 0xC54E
    TCP: Urgent Pointer = 0 (0x0)
00000: 00 08 9F 02 AC 86 00 0F EA C0 8C 38 08 00 45 00 ..Ÿ.¬†..êÀŒ8..E.
00010: 00 28 F9 06 40 00 80 06 1D 15 C0 A8 00 64 D2 76 .(ù.@.€...À¨.dÒv
00020: 51 31 0E 32 00 50 ED 9D 32 BA DA 46 FC AC 50 14 Q1.2.Pí2ºÚFü¬P.
00030: 00 00 C5 4E 00 00 ..ÅN..


TCP: ....S., len: 0, seq:3292276979-3292276979, ack: 0, win:65535, src: 3635 dst: 80
    TCP: Source Port = 0x0E33
    TCP: Destination Port = Hypertext Transfer Protocol
    TCP: Sequence Number = 3292276979 (0xC43C28F3)
    TCP: Acknowledgement Number = 0 (0x0)
    TCP: Data Offset = 28 (0x1C)
    TCP: Reserved = 0 (0x0000)
    TCP: Flags = 0x02 : ....S.
        TCP: ..0..... = No urgent data
        TCP: ...0.... = Acknowledgement field not significant
        TCP: ....0... = No Push function
        TCP: .....0.. = No Reset
        TCP: ......1. = Synchronize sequence numbers
        TCP: .......0 = No Fin
    TCP: Window = 65535 (0xFFFF)
    TCP: Checksum = 0xA2B8
    TCP: Urgent Pointer = 0 (0x0)
    TCP: Options
        TCP: Maximum Segment Size Option
            TCP: Option Type = Maximum Segment Size
            TCP: Option Length = 4 (0x4)
            TCP: Maximum Segment Size = 1460 (0x5B4)
        TCP: Option Nop = 1 (0x1)
        TCP: Option Nop = 1 (0x1)
        TCP: SACK Permitted Option
            TCP: Option Type = Sack Permitted
            TCP: Option Length = 2 (0x2)

웹서버 ----------------> 클라이언트

HTTP: Response (to client using port 3634)
    HTTP: Data: Number of data bytes remaining = 1460 (0x05B4)
00000: 00 0F EA C0 8C 38 00 08 9F 02 AC 86 08 00 45 00 ..êÀŒ8..Ÿ.¬†..E.
00010: 05 DC EE 90 40 00 78 06 29 D7 D2 76 51 31 C0 A8 .Üî@.x.)×ÒvQ1À¨
00020: 00 64 00 50 0E 32 DA 46 FC AC ED 9D 32 BA 50 10 .d.P.2ÚFü¬í2ºP.
00030: 42 C0 CB CD 00 00 0A 09 2F 2F 66 6F 72 20 64 69 BÀËÍ....//for di
00040: 73 70 6C 61 79 2C 20 77 65 20 6E 65 65 64 20 74 splay, we need t
00050: 6F 20 73 6B 69 70 20 61 66 74 65 72 20 68 74 74 o skip after htt
00060: 70 3A 2F 2F 2C 20 61 6E 64 20 67 6F 20 74 6F 20 p://, and go to
00070: 74 68 65 20 6E 65 78 74 20 73 6C 61 73 68 0D 0A the next slash..
00080: 09 64 69 73 70 6C 61 79 72 65 73 75 6C 74 3D 44 .displayresult=D
00090: 6F 63 55 52 4C 2E 73 75 62 73 74 72 69 6E 67 28 ocURL.substring(
000A0: 70 72 6F 74 6F 63 6F 6C 49 6E 64 65 78 20 2B 20 protocolIndex +
000B0: 33 20 2C 73 65 72 76 65 72 49 6E 64 65 78 29 3B 3 ,serverIndex);
000C0: 0D 0A 0D 0A 09 49 6E 73 65 72 74 45 6C 65 6D 65 .....InsertEleme
000D0: 6E 74 41 6E 63 68 6F 72 28 75 72 6C 72 65 73 75 ntAnchor(urlresu
000E0: 6C 74 2C 20 64 69 73 70 6C 61 79 72 65 73 75 6C lt, displayresul
000F0: 74 29 3B 0D 0A 7D 0D 0A 0D 0A 66 75 6E 63 74 69 t);..}....functi
00100: 6F 6E 20 48 74 6D 6C 45 6E 63 6F 64 65 28 74 65 on HtmlEncode(te
00110: 78 74 29 0D 0A 7B 0D 0A 20 20 20 20 72 65 74 75 xt)..{.. retu
00120: 72 6E 20 74 65 78 74 2E 72 65 70 6C 61 63 65 28 rn text.replace(
00130: 2F 26 2F 67 2C 20 27 26 61 6D 70 27 29 2E 72 65 /&/g, '&amp').re
00140: 70 6C 61 63 65 28 2F 27 2F 67 2C 20 27 26 71 75 place(/'/g, '&qu
00150: 6F 74 3B 27 29 2E 72 65 70 6C 61 63 65 28 2F 3C ot;').replace(/<
00160: 2F 67 2C 20 27 26 6C 74 3B 27 29 2E 72 65 70 6C /g, '&lt;').repl
00170: 61 63 65 28 2F 3E 2F 67 2C 20 27 26 67 74 3B 27 ace(/>/g, '&gt;'
00180: 29 3B 0D 0A 7D 0D 0A 0D 0A 66 75 6E 63 74 69 6F );..}....functio
00190: 6E 20 54 61 67 41 74 74 72 69 62 28 6E 61 6D 65 n TagAttrib(name
001A0: 2C 20 76 61 6C 75 65 29 0D 0A 7B 0D 0A 20 20 20 , value)..{..
001B0: 20 72 65 74 75 72 6E 20 27 20 27 2B 6E 61 6D 65 return ' '+name
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001D0: 28 76 61 6C 75 65 29 2B 27 22 27 3B 0D 0A 7D 0D (value)+'"';..}.
001E0: 0A 0D 0A 66 75 6E 63 74 69 6F 6E 20 50 72 69 6E ...function Prin
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00230: 20 27 3C 27 20 2B 20 74 61 67 4E 61 6D 65 20 2B '<' + tagName +
00240: 20 61 74 74 72 69 62 20 2B 20 27 3E 27 20 2B 20 attrib + '>' +
00250: 48 74 6D 6C 45 6E 63 6F 64 65 28 69 6E 6E 65 72 HtmlEncode(inner
00260: 29 20 29 3B 0D 0A 20 20 20 20 69 66 20 28 6E 65 ) );.. if (ne
00270: 65 64 43 6C 6F 73 65 54 61 67 29 20 64 6F 63 75 edCloseTag) docu
00280: 6D 65 6E 74 2E 77 72 69 74 65 28 20 27 3C 2F 27 ment.write( '</'
00290: 20 2B 20 74 61 67 4E 61 6D 65 20 2B 27 3E 27 20 + tagName +'>'
002A0: 29 3B 0D 0A 7D 0D 0A 0D 0A 66 75 6E 63 74 69 6F );..}....functio
002B0: 6E 20 55 52 49 28 68 72 65 66 29 0D 0A 7B 0D 0A n URI(href)..{..
002C0: 20 20 20 20 49 45 56 65 72 20 3D 20 77 69 6E 64 IEVer = wind
002D0: 6F 77 2E 6E 61 76 69 67 61 74 6F 72 2E 61 70 70 ow.navigator.app
002E0: 56 65 72 73 69 6F 6E 3B 0D 0A 20 20 20 20 49 45 Version;.. IE
002F0: 56 65 72 20 3D 20 49 45 56 65 72 2E 73 75 62 73 Ver = IEVer.subs
00300: 74 72 28 20 49 45 56 65 72 2E 69 6E 64 65 78 4F tr( IEVer.indexO
00310: 66 28 27 4D 53 49 45 27 29 20 2B 20 35 2C 20 33 f('MSIE') + 5, 3
00320: 20 29 3B 0D 0A 0D 0A 20 20 20 20 72 65 74 75 72 );.... retur
00330: 6E 20 28 49 45 56 65 72 2E 63 68 61 72 41 74 28 n (IEVer.charAt(
00340: 31 29 3D 3D 27 2E 27 20 26 26 20 49 45 56 65 72 1)=='.' && IEVer
00350: 20 3E 3D 20 27 35 2E 35 27 29 20 3F 0D 0A 20 20 >= '5.5') ?..
00360: 20 20 20 20 20 20 65 6E 63 6F 64 65 55 52 49 28 encodeURI(
00370: 68 72 65 66 29 20 3A 0D 0A 20 20 20 20 20 20 20 href) :..
00380: 20 65 73 63 61 70 65 28 68 72 65 66 29 2E 72 65 escape(href).re
00390: 70 6C 61 63 65 28 2F 25 33 41 2F 67 2C 20 27 3A place(/%3A/g, ':
003A0: 27 29 2E 72 65 70 6C 61 63 65 28 2F 25 33 42 2F ').replace(/%3B/
003B0: 67 2C 20 27 3B 27 29 3B 0D 0A 7D 0D 0A 0D 0A 66 g, ';');..}....f
003C0: 75 6E 63 74 69 6F 6E 20 49 6E 73 65 72 74 45 6C unction InsertEl
003D0: 65 6D 65 6E 74 41 6E 63 68 6F 72 28 68 72 65 66 ementAnchor(href
003E0: 2C 20 74 65 78 74 29 0D 0A 7B 0D 0A 20 20 20 20 , text)..{..
003F0: 50 72 69 6E 74 54 61 67 28 27 41 27 2C 20 74 72 PrintTag('A', tr
00400: 75 65 2C 20 54 61 67 41 74 74 72 69 62 28 27 48 ue, TagAttrib('H
00410: 52 45 46 27 2C 20 55 52 49 28 68 72 65 66 29 29 REF', URI(href))
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00490: 3E 0D 0A 0D 0A 20 20 3C 74 72 3E 0D 0A 20 20 20 >.... <tr>..
004A0: 20 3C 74 64 20 61 6C 69 67 6E 3D 22 6C 65 66 74 <td align="left
004B0: 22 20 76 61 6C 69 67 6E 3D 22 6D 69 64 64 6C 65 " valign="middle
004C0: 22 20 77 69 64 74 68 3D 22 33 36 30 22 3E 0D 0A " width="360">..
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• [다음 글] 스마트클라이언트에서의 DB접속
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