Nice answer, thx for posting it.
On Sun, Jan 22, 2017 at 4:13 AM, Tim Selander via use-livecode < use-livecode@lists.runrev.com> wrote: > Phil and Mike, Thanks for your pointers -- both look like they will work. > Also in continuing to poke around the web, I also found this function that > works: > > function qrtHTTP_FileExists pURL > breakpoint > local tSocket, tPath, tHeaders, tCommand > set the itemDelimiter to "/" > -- extract host IP address and file path from the URL > put item 3 of pURL into tHost > if tHost contains ":" then > put tHost into tSocket > else > put tHost & ":80" into tSocket > end if > put "/" & item 4 to -1 of pURL into tPath > -- build the command > put "HEAD" && tPath && "HTTP/1.1" into tCommand > -- build the http headers > put "Connection: Close" & CRLF & \ > "Host:" && tHost & CRLF & \ > "User-Agent: Revolution (" & the version & ")" into tHeaders > -- open the socket, write he request and read the response > open socket tSocket > write tCommand & CRLF & tHeaders & CRLF & CRLF to socket tSocket > read from socket tSocket until CRLF > put word 2 of it into tResultCode > close socket tSocket > -- return our interpretation of the result code > return (tResultCode = 200) > end qrtHTTP_FileExists > > It's working for me.... but now I can't re-find it so I can't credit > whoever wrote it! > > Copying here for posterity! > > Tim Selander > Tokyo, Japan > > > > On 2017.01.22, 19:09, Mike Bonner via use-livecode wrote: > >> If you have php on your second server, and don't have lc, you can do a >> check with php similar to what you're talking about. This is untested >> but.. >> >> If you have the following php file (perhaps named checkforfile.php) on the >> alternate server, and send it a get request containing the path to the >> file >> youre looking for, it will return true or false if it exists. This is >> obviously an extremely bare example. You'd want to make sure the get >> contains "myfile" and handle that too, as well as any other issues. In >> addition, you would probably want to limit the requests to only allowed >> areas and file types in the php script. >> <?php >> echo file_exists($_GET["myfile"]); >> ?> >> >> From the lc side of things you could do something like this.. >>> >> >> <?lc >> get url " >> http://your.alternateserver.com/checkforfile.php?myfile=theFile.mp3" >> if it is true then >> put "<audio src=http://my.programserver.com/theFile.mp3>" >> else >> put "program not found." >> end if >> ?> >> >> Of course if you DO have lc on the program server you can do the same type >> of check and "put" true or false just like you did with php. (Also can be >> done with javascript, asp, etc) >> On Sun, Jan 22, 2017 at 2:16 AM, Phil Davis via use-livecode < >> use-livecode@lists.runrev.com> wrote: >> >> Hi Tim, >>> >>> Here is a very simplistic way of checking for a file on your server. It >>> assumes your mp3 files are in a 'programs' folder that resides in the >>> 'document root' folder. This script as it is here would be in a .lc file >>> on >>> your server. You pass it a filename in the url and it tells you if the >>> file >>> is in the programs folder or not. >>> >>> So the url would look something like this: >>> >>> http://my.programserver.com/check.lc?1234.mp3 >>> >>> >>> The text of the 'check.lc' file: >>> >>> <?lc >>> set the errorMode to "inline" >>> put $_SERVER["QUERY_STRING"] into tFilename >>> put $_SERVER["DOCUMENT_ROOT"] & "/programs/" & tFilename into >>> tPath >>> if there is a file tPath then >>> put "Found file" && q(tFilename) >>> else >>> put "Did not find file" && q(tFilename) >>> end if >>> ?> >>> >>> >>> <?lc >>> function q pString >>> return quote & pString & quote >>> end q >>> ?> >>> >>> This is most likely not exactly what you need, but maybe it'll give you a >>> starting point. >>> >>> Thanks - >>> Phil Davis >>> >>> >>> >>> On 1/21/17 11:36 PM, Tim Selander via use-livecode wrote: >>> >>> Hi, >>>> >>>> On-rev.com hosting, using LC server to present a list of our AM/FM radio >>>> programs for people to listening to on-demand. >>>> >>>> Out of a month's 20 programs, 3 or 4 might not get uploaded due to >>>> copyright issues, etc. Also, mp3's are not on the on-rev.com server, >>>> but >>>> another hosting service we use as well. >>>> >>>> Filenaming is standardized, so I know the list of programs. I want to >>>> hit >>>> the server, if the mp3 files exists, present it as an <audio src=, if >>>> the >>>> mp3 file does not exists, present a "Sorry, program not available" >>>> message. >>>> >>>> If I wanted to check on the existence of a small text file, it would be >>>> fast enough for me to just get it, put it into a variable and see if the >>>> variable has anything in it. But mp3's are too big, so too slow. >>>> >>>> Locally, I would simply write "if there is a file 'filename'..." -- >>>> what's the equivalent command for checking on existence of a file on a >>>> server? >>>> >>>> Thanks in advance. >>>> >>>> Tim Selander >>>> Tokyo, Japan >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> use-livecode mailing list >>>> use-livecode@lists.runrev.com >>>> Please visit this url to subscribe, unsubscribe and manage your >>>> subscription preferences: >>>> http://lists.runrev.com/mailman/listinfo/use-livecode >>>> >>>> >>>> -- >>> Phil Davis >>> >>> >>> _______________________________________________ >>> use-livecode mailing list >>> use-livecode@lists.runrev.com >>> Please visit this url to subscribe, unsubscribe and manage your >>> subscription preferences: >>> http://lists.runrev.com/mailman/listinfo/use-livecode >>> >>> _______________________________________________ >> use-livecode mailing list >> use-livecode@lists.runrev.com >> Please visit this url to subscribe, unsubscribe and manage your >> subscription preferences: >> http://lists.runrev.com/mailman/listinfo/use-livecode >> >> > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode