WebGetIfNotExist

Syntax

WebGetIfNotExist,<FileToDownload>,<FileOnDisk>[,MD5][,Ask][,Timeout]] 

Use this function to download files from a network server to the local machine. The WebGetIfNotExist command will only download a file if it is not already found as FileOnDisk - particularly useful to download a zipped file once from an internet server and ignore the download the following times the script is executed.

• It is assumed that both machines (local and remote) are prepared for this operation.
• No checks are done to ensure that the local machine is online or that is has enough disk space to download the file.
• The remote server must also be accessible and the file must be available for download.
• Only direct download links are accepted, dynamic internet pages are not valid.

MD5 check is an additional parameter that can be added to ensure that your file matches a security check based on the MD5 hash calculation.

• This is an optional parameter, only needed for cases when it is important to only accept a file that passes on this download integrity test.
• If a file fails this test it won't be copied over to the final destination as FileOnDisk.

The optional parameters of Ask and Timeout are only used if enabled , and if enabled, will display a question dialog box, and wait for a response. This can be used to let the user skip over a download operation.

• To use this feature, the line "Ask before WebGet" in the Winbuilder Tab TOOLS\OPTIONS has to be checked.
• To use optional timeout, the line "Use Timeout when asking" in the Winbuilder Tab TOOLS\OPTIONS has to be checked.

If the target filename folder already exist, it will NOT be created. See WebGet for alternative behavior)

Example:

In this example we download the file iview423.zip from server foo.com to the folder c:\IrfanView\iview423.zip ONLY if the file does not already exist in that location, and

• only if MD5sum is fd490d07cc236cb44ef29abfd9daf13d
• with a question dialog's text string displaying 'ZIP-file'
• and automatically accept the dialog (i.e. timeout) after 10 seconds

WebGetIfnotExist,http://foo.com/iview423.zip,c:\IrfanView\iview423.zip,fd490d07cc236cb44ef29abfd9daf13d,ZIP-file,10