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ddur/ReadHttpPage

Created November 29, 2014 18:03
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Read internet page/file from Clarion 6.3 using wininet
Raw
global or module data section
AgentFF CSTRING('Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3<0>')
AgentIE CSTRING('Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)<0>')
Agent00 CSTRING(' <0>')
szGET CSTRING('GET<0>')
szPOST CSTRING('POST<0>')
equ:szAgent equate ( Agent00 )
INTERNET_INVALID_PORT_NUMBER equate (0) ! use the protocol-specific default
INTERNET_DEFAULT_FTP_PORT equate (21) ! default for FTP servers
INTERNET_DEFAULT_GOPHER_PORT equate (70) ! " " gopher "
INTERNET_DEFAULT_HTTP_PORT equate (80) ! " " HTTP "
INTERNET_DEFAULT_HTTPS_PORT equate (443) ! " " HTTPS "
INTERNET_DEFAULT_SOCKS_PORT equate (1080) ! default for SOCKS firewall servers.
INTERNET_MAX_HOST_NAME_LENGTH equate (256)
INTERNET_MAX_USER_NAME_LENGTH equate (128)
INTERNET_MAX_PASSWORD_LENGTH equate (128)
INTERNET_MAX_PORT_NUMBER_LENGTH equate (5) ! INTERNET_PORT is unsigned short
INTERNET_MAX_PORT_NUMBER_VALUE equate (65535) ! maximum unsigned short value
INTERNET_MAX_PATH_LENGTH equate (2048)
INTERNET_MAX_SCHEME_LENGTH equate (32) ! longest protocol name length
INTERNET_MAX_DELIMITER_SIZE equate (3)
INTERNET_MAX_URL_LENGTH equate (INTERNET_MAX_SCHEME_LENGTH |
+ INTERNET_MAX_DELIMITER_SIZE |
+ INTERNET_MAX_PATH_LENGTH)
INTERNET_SERVICE_URL equate (0)
INTERNET_SERVICE_FTP equate (1)
INTERNET_SERVICE_GOPHER equate (2)
INTERNET_SERVICE_HTTP equate (3)
INTERNET_OPEN_TYPE_PRECONFIG equate (0) ! use registry configuration
INTERNET_OPEN_TYPE_DIRECT equate (1) ! direct to net
INTERNET_OPEN_TYPE_PROXY equate (3) ! via named proxy
INTERNET_OPEN_TYPE_PRECONFIG_WITH_NO_AUTOPROXY equate (4) ! prevent using java/script/INS
!INTERNET_FLAG_ASYNC equate (010000000h) ! this request is asynchronous (where supported)
!INTERNET_FLAG_NEED_FILE equate (000000010h) ! need a file for this request
!COOKIES
INTERNET_FLAG_RESTRICTED_ZONE equate ( 00020000H ) !// apply restricted zone policies for cookies, auth
INTERNET_COOKIE_HTTPONLY equate ( 00002000H )
INTERNET_COOKIE_THIRD_PARTY equate ( 00000010H )
!WinAPI InternetGetCookie(Ex) GetLastError()
ERROR_INSUFFICIENT_BUFFER equate (122)
ERROR_NO_MORE_ITEMS equate (259)
ERROR_INVALID_PARAMETER equate (87)
Raw
global or module map section
module ( 'WinApi' )
GetLastError (), long, proc, raw, pascal
sleep ( long ), pascal
.
module ( 'WinInet' )
! HINTERNET InternetOpen(
! IN LPCSTR lpszAgent,
! IN DWORD dwAccessType,
! IN LPCSTR lpszProxyName,
! IN LPCSTR lpszProxyBypass,
! IN DWORD dwFlags
! );
internetOpen ( long, long, long, long, long), long, raw, pascal, name( 'InternetOpenA' )
! HINTERNET InternetOpenUrl(
! IN HINTERNET hInternetSession,
! IN LPCSTR lpszUrl,
! IN LPCSTR lpszHeaders,
! IN DWORD dwHeadersLength,
! IN DWORD dwFlags,
! IN DWORD dwContext
! );
internetOpenURL ( long, long, long, long, long, long), long, proc, raw, pascal, name( 'InternetOpenURLA' )
! HINTERNET InternetConnect(
! IN HINTERNET hInternetSession,
! IN LPCSTR lpszServerName,
! IN INTERNET_PORT nServerPort,
! IN LPCSTR lpszUsername,
! IN LPCSTR lpszPassword,
! IN DWORD dwService,
! IN DWORD dwFlags,
! IN DWORD dwContext
! );
internetConnect ( long, long, uShort, long, long, long, long, long ), long, raw, pascal, name ( 'InternetConnectA' )
! HINTERNET HttpOpenRequest(
! IN HINTERNET hHttpSession,
! IN LPCSTR lpszVerb,
! IN LPCSTR lpszObjectName,
! IN LPCSTR lpszVersion,
! IN LPCSTR lpszReferer,
! IN LPCSTR FAR * lpszAcceptTypes,
! IN DWORD dwFlags,
! IN DWORD dwContext
! );
httpOpenRequest ( long, long, long, long, long, long, long, long ), long, raw, pascal, name ( 'HttpOpenRequestA' )
! BOOL HttpSendRequest(
! IN HINTERNET hHttpRequest,
! IN LPCSTR lpszHeaders,
! IN DWORD dwHeadersLength,
! IN LPVOID lpOptional,
! DWORD dwOptionalLength
! );
httpSendRequest ( long, long, long, long, long ), long, proc, raw, pascal, name ( 'HttpSendRequestA' )
! BOOL InternetReadFile(
! IN HINTERNET hFile,
! IN LPVOID lpBuffer,
! IN DWORD dwNumberOfBytesToRead,
! OUT LPDWORD lpNumberOfBytesRead
! );
internetReadFile ( long, long, long, *long), long, proc, raw, pascal
! BOOL InternetCloseHandle(
! IN HINTERNET hInet
! );
internetCloseHandle ( long ), long, proc, raw, pascal
.
Raw
ReadHttpPage
ReadHttpPage PROCEDURE ( szServer, szAction, szPage, dwSize ) ! Declare Procedure
hWininetSession LONG !
hWininetHttpSession LONG !
hWininetHttpRequest LONG !
dwBytesRead LONG !
dwOutSize LONG !
dwResult LONG !
szBuffer CSTRING(1025) !
! Start of "Data Section"
! [Priority 3500]
dwBufferSize equate ( size ( szBuffer ) - 1 )
! End of "Data Section"
CODE
! Start of "Processed Code"
! [Priority 4000]
dwResult = false
dwOutSize = false
hWininetSession = internetOpen ( address ( equ:szAgent ), INTERNET_OPEN_TYPE_PRECONFIG, false, false, false )
if hWininetSession
hWininetHttpSession = internetConnect ( hWininetSession, address ( szServer ), INTERNET_DEFAULT_HTTP_PORT, false, false, INTERNET_SERVICE_HTTP, false, true )
if hWininetHttpSession
hWininetHttpRequest = httpOpenRequest ( hWininetHttpSession, address ( szGET ), address ( szAction ), false, false, false, false, true )
if hWininetHttpRequest
loop
loop 10 times
sleep ( 0 )
.
dwResult = internetReadFile ( hWininetHttpRequest, address ( szBuffer ), dwBufferSize, dwBytesRead )
if ~dwResult or ~dwBytesRead
break
.
if ( dwOutSize + dwBytesRead ) <= dwSize
szPage [ ( dwOutSize + 1 ) : ( dwOutSize + dwBytesRead ) ] = szBuffer [ 1 : dwBytesRead ]
else
szPage [ ( dwOutSize + 1 ) : dwSize ] = szBuffer [ 1 : dwBytesRead ]
break
.
dwOutSize += dwBytesRead
.
internetCloseHandle ( hWininetHttpRequest )
.
internetCloseHandle ( hWininetHttpSession )
.
internetCloseHandle ( hWininetSession )
.
return dwResult
Raw
ReadInetFile
ReadInetFile PROCEDURE ( szURL, szFile, dwSize ) ! Declare Procedure
hWininetSession LONG !
hWininetURLSession LONG !
dwBytesRead LONG !
dwOutSize LONG !
dwResult LONG !
szBuffer CSTRING(1025) !
! Start of "Data Section"
! [Priority 3500]
dwBufferSize equate ( size ( szBuffer ) - 1 )
! End of "Data Section"
CODE
! Start of "Processed Code"
! [Priority 4000]
dwResult = false
hWininetSession = internetOpen ( address ( equ:szAgent ), INTERNET_OPEN_TYPE_PRECONFIG, false, false, false )
if hWininetSession
hWininetURLSession = internetOpenURL ( hWininetSession, address ( szURL ), false, false, false, false )
if hWininetURLSession
dwOutSize = false
if ~dwSize
dwSize = size ( szFile ) - 1
.
loop
loop 10 times
sleep ( 0 )
.
dwResult = internetReadFile ( hWininetURLSession, address ( szBuffer ), dwBufferSize, dwBytesRead )
if ~dwResult or ~dwBytesRead
break
.
if ( dwOutSize + dwBytesRead ) <= dwSize
szFile [ ( dwOutSize + 1 ) : ( dwOutSize + dwBytesRead ) ] = szBuffer [ 1 : dwBytesRead ]
else
szFile [ ( dwOutSize + 1 ) : dwSize ] = szBuffer [ 1 : dwBytesRead ]
break
.
dwOutSize += dwBytesRead
.
internetCloseHandle ( hWininetURLSession )
.
internetCloseHandle ( hWininetSession )
.
return dwResult
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