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  Dicas

  Visual Basic    (Redes/Comunicações)

Título da Dica:  FTP - Listar arquivos de uma conexão FTP (sem Winsock somente API)
Postada em 2/9/2004 por C4du            
'Em um form com uma ListBox chamada List1 adicione o código no declarations.
'O como e o porque estão nos comentários das linhas
'--------------------------------------------------------------------------------
'c4du  05/09/2003

Option Explicit

'Definições / Cabeçalhos de API´s utilizadas

Const FTP_TRANSFER_TYPE_UNKNOWN = &H0
Const FTP_TRANSFER_TYPE_ASCII = &H1
Const FTP_TRANSFER_TYPE_BINARY = &H2
Const INTERNET_DEFAULT_FTP_PORT = 21               ' porta default para comunicação FTP
Const INTERNET_SERVICE_FTP = 1
Const INTERNET_FLAG_PASSIVE = &H8000000            ' modo passivo
Const INTERNET_OPEN_TYPE_PRECONFIG = 0
Const INTERNET_OPEN_TYPE_DIRECT = 1
Const INTERNET_OPEN_TYPE_PROXY = 3
Const INTERNET_OPEN_TYPE_PRECONFIG_WITH_NO_AUTOPROXY = 4
Const MAX_PATH = 260
Private Type FILETIME
    dwLowDateTime As Long
    dwHighDateTime As Long
End Type
Private Type WIN32_FIND_DATA
    dwFileAttributes As Long
    ftCreationTime As FILETIME
    ftLastAccessTime As FILETIME
    ftLastWriteTime As FILETIME
    nFileSizeHigh As Long
    nFileSizeLow As Long
    dwReserved0 As Long
    dwReserved1 As Long
    cFileName As String * MAX_PATH
    cAlternate As String * 14
End Type
Private Declare Function InternetCloseHandle Lib "wininet.dll" (ByVal hInet As Long) As Integer
Private Declare Function InternetConnect Lib "wininet.dll" Alias "InternetConnectA" (ByVal hInternetSession As Long, ByVal sServerName As String, ByVal nServerPort As Integer, ByVal sUserName As String, ByVal sPassword As String, ByVal lService As Long, ByVal lFlags As Long, ByVal lContext As Long) As Long
Private Declare Function InternetOpen Lib "wininet.dll" Alias "InternetOpenA" (ByVal sAgent As String, ByVal lAccessType As Long, ByVal sProxyName As String, ByVal sProxyBypass As String, ByVal lFlags As Long) As Long
Private Declare Function FtpSetCurrentDirectory Lib "wininet.dll" Alias "FtpSetCurrentDirectoryA" (ByVal hFtpSession As Long, ByVal lpszDirectory As String) As Boolean
Private Declare Function FtpGetCurrentDirectory Lib "wininet.dll" Alias "FtpGetCurrentDirectoryA" (ByVal hFtpSession As Long, ByVal lpszCurrentDirectory As String, lpdwCurrentDirectory As Long) As Long
Private Declare Function FtpCreateDirectory Lib "wininet.dll" Alias "FtpCreateDirectoryA" (ByVal hFtpSession As Long, ByVal lpszDirectory As String) As Boolean
Private Declare Function FtpRemoveDirectory Lib "wininet.dll" Alias "FtpRemoveDirectoryA" (ByVal hFtpSession As Long, ByVal lpszDirectory As String) As Boolean
Private Declare Function FtpDeleteFile Lib "wininet.dll" Alias "FtpDeleteFileA" (ByVal hFtpSession As Long, ByVal lpszFileName As String) As Boolean
Private Declare Function FtpRenameFile Lib "wininet.dll" Alias "FtpRenameFileA" (ByVal hFtpSession As Long, ByVal lpszExisting As String, ByVal lpszNew As String) As Boolean
Private Declare Function FtpGetFile Lib "wininet.dll" Alias "FtpGetFileA" (ByVal hConnect As Long, ByVal lpszRemoteFile As String, ByVal lpszNewFile As String, ByVal fFailIfExists As Long, ByVal dwFlagsAndAttributes As Long, ByVal dwFlags As Long, ByRef dwContext As Long) As Boolean
Private Declare Function FtpPutFile Lib "wininet.dll" Alias "FtpPutFileA" (ByVal hConnect As Long, ByVal lpszLocalFile As String, ByVal lpszNewRemoteFile As String, ByVal dwFlags As Long, ByVal dwContext As Long) As Boolean
Private Declare Function InternetGetLastResponseInfo Lib "wininet.dll" Alias "InternetGetLastResponseInfoA" (lpdwError As Long, ByVal lpszBuffer As String, lpdwBufferLength As Long) As Boolean
Private Declare Function FtpFindFirstFile Lib "wininet.dll" Alias "FtpFindFirstFileA" (ByVal hFtpSession As Long, ByVal lpszSearchFile As String, lpFindFileData As WIN32_FIND_DATA, ByVal dwFlags As Long, ByVal dwContent As Long) As Long
Private Declare Function InternetFindNextFile Lib "wininet.dll" Alias "InternetFindNextFileA" (ByVal hFind As Long, lpvFindData As WIN32_FIND_DATA) As Long
Const PassiveConnection As Boolean = True



Private Sub Form_Load()

Dim hConnection As Long, hOpen As Long, sOrgPath  As String
'Abre a conexão
hOpen = InternetOpen("API-Guide sample program", INTERNET_OPEN_TYPE_PRECONFIG, vbNullString, vbNullString, 0)
'conecta
hConnection = InternetConnect(hOpen, "<aqui: ftp. ...  tattaa>", INTERNET_DEFAULT_FTP_PORT, "<login>", "< senha >", INTERNET_SERVICE_FTP, IIf(PassiveConnection, INTERNET_FLAG_PASSIVE, 0), 0)
'cria buffer para o diretorio
sOrgPath = String(MAX_PATH, 0)
'le diretorio passando o buffer como paramentro
FtpGetCurrentDirectory hConnection, sOrgPath, Len(sOrgPath)

'SETA  o diretprio corrente, passando a conexão e o diretorio. Este diretório deverá estar dentro do seu path atual, ou passe um caminho
FtpSetCurrentDirectory hConnection, "testing"

listaArquivos hConnection

'fecha conexão
InternetCloseHandle hConnection
InternetCloseHandle hOpen
End Sub

Public Sub listaArquivos(hConnection As Long)
Dim pData As WIN32_FIND_DATA, hFind As Long, lRet As Long
'buffer
pData.cFileName = String(MAX_PATH, 0)
'Tenta ler o que seria o primeiro arquivo
hFind = FtpFindFirstFile(hConnection, "*.*", pData, 0, 0)
'se não achou nada sai fora
If hFind = 0 Then Exit Sub


List1.AddItem Left(pData.cFileName, InStr(1, pData.cFileName, String(1, 0), vbBinaryCompare) - 1)
Do
'Buffer que recevberá o nome do arquivo
pData.cFileName = String(MAX_PATH, 0)
'le o nome do proximo arquivo
lRet = InternetFindNextFile(hFind, pData)
'if there's no next file, exit do
If lRet = 0 Then Exit Do
'carrega arquivo no list
List1.AddItem Left(pData.cFileName, InStr(1, pData.cFileName, String(1, 0), vbBinaryCompare) - 1)
Loop
'fecha sessão
InternetCloseHandle hFind
End Sub

'-------------------------------------------------------------
'QUalquer dúvida post no forum
[]s
C4du
 


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