Re: Image size & weight limit on upload
This WebDNA talk-list message is from 2002
It keeps the original formatting.
numero = 41234
interpreted = N
texte = > How do I limit the width/height and size of a file when someone is > uploading it to my site?You can only do this after the file is uploaded; you have no way to determine these values before the file is uploaded. Although, you can run a [deletefile] context if they are outside your parameters.Since I do not know where you are at in this process, I am going to start at the very beginning. Feel free to ignore any steps you have already completed:------------------------------ formpage.tpl------------------------------
------------------------------writefile.tpl------------------------------ [text]image=[/text][formvariables] [showif [url][name][/url]^[url]image[/url]] [hideif [image]=] [writefile file=../images/filename.jpg][value][/writefile] [/hideif] [/showif] [/formvariables][math show=F]errors=0[/math][fileinfo file=../images/filename.jpg] [showif [exists]=F] [math show=F]errors=[errors]+1[/math] [/showif] [showif [size]>52223] [math show=F]errors=[errors]+1[/math] [/showif] [showif [imagewidth]>350] [math show=F]errors=[errors]+1[/math] [/showif] [showif [imageheight]>350] [math show=F]errors=[errors]+1[/math] [/showif] [/fileinfo][showif [errors]=0][include file=correctpage.txt][/showif] [showif [errors]>0][include file=errorpage.txt][/showif]------------------------------end of code------------------------------Since there will already be a delay when posting the original form due to the time it takes for the image file to upload, I find that checking the size information in the same template produces no noticible additional delay (it would probably be only milliseconds anyway). Also, if you are interested, I have some code for detecting whether an image file is a Jpeg or Gif file which is not based on file extension.Dennis ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list
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Associated Messages, from the most recent to the oldest:
> How do I limit the width/height and size of a file when someone is > uploading it to my site?You can only do this after the file is uploaded; you have no way to determine these values before the file is uploaded. Although, you can run a [deletefile] context if they are outside your parameters.Since I do not know where you are at in this process, I am going to start at the very beginning. Feel free to ignore any steps you have already completed:------------------------------ formpage.tpl------------------------------ ------------------------------writefile.tpl------------------------------ [text]image=[/text][formvariables] [showif [url][name][/url]^[url]image[/url]] [hideif [image]=] [writefile file=../images/filename.jpg][value][/writefile] [/hideif] [/showif] [/formvariables][math show=F]errors=0[/math][fileinfo file=../images/filename.jpg] [showif [exists]=F] [math show=F]errors=[errors]+1[/math] [/showif] [showif [size]>52223] [math show=F]errors=[errors]+1[/math] [/showif] [showif [imagewidth]>350] [math show=F]errors=[errors]+1[/math] [/showif] [showif [imageheight]>350] [math show=F]errors=[errors]+1[/math] [/showif] [/fileinfo][showif [errors]=0][include file=correctpage.txt][/showif] [showif [errors]>0][include file=errorpage.txt][/showif]------------------------------end of code------------------------------Since there will already be a delay when posting the original form due to the time it takes for the image file to upload, I find that checking the size information in the same template produces no noticible additional delay (it would probably be only milliseconds anyway). Also, if you are interested, I have some code for detecting whether an image file is a Jpeg or Gif file which is not based on file extension.Dennis ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://search.smithmicro.com/
Dennis J. Bonsall, Jr.
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