At 08:50 AM 6/16/2004, Linck, Ken wrote:
Sorry..didnt make the connection initially between your initial proposal and mine. Some subtle differences but mostly identical.
-----Original Message----- From: mike [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 16, 2004 11:14 AM To: Struts Users Mailing List; Struts Users Mailing List Subject: RE: Rendering Images
I forgot. I have the entire solution I use at the struts wiki at http://wiki.apache.org/struts/StrutsCatalogEschewUrlForProtocol. All you have to do is to examine the input and give a different output for your problem. I use Wendy's get the data right solution, but I don't have your problem. This is the easiest way to do this, I think.
At 11:20 PM 6/15/2004, Linck, Ken wrote: >It sounds like you have enough ways to do it and just asking what would
>be the best way or if there is another way to more efficiently handle >your situation. Yes? > >I cannot think of one personally. If your only means is HTTP, your >only choice is evaluating the response to determine if something exists
>as far as I can tell. If the request cant be served, I assume you get >a typical response code like a 404? Not sure what else there is. > >Nothing is real efficient when it comes to file io like functions via >HTTP. We tried to have a standard once for serving up file like >functions via HTTP but it becomes complex if you wanted to perform >other file-io activities like list files, seeing if they exist, list >directories, get file modified dates/times, delete files etc. Almost >felt like putting a square peg in a round hole for us(Course I might be
>behind on the latest and greatest of HTTP). > >If I was concerned about managing unreliable sources, I probably would >have attempted a proxy-like solution through a struts action at first >crack to do as little coding as possible but it sounds like your past >the first crack at it? > >I will offer up my solution for battering by the populous here. > >You could set up a specific action which serves the images for remote >sites. Your JSP would have an action with a parameter passing in the >remote URL of the remote site. Since you indicated that you >semi-manage the reference of the image but cant guarantee that it >actually exists since its elsewhere, this solution might work good(i.e.
>you are supplying the remote URL?). > >You could open a request to the remote site of your URL in a Struts >Action instead, if you get a success, take the content of the response >and shove it into your response, otherwise, shove the no-image found >file(from your server) into the response(Make sure you return a null >action mapping) since your writing off the content directly. > >Your JSP Might look like this: ><img >src="http://www.mysites.com/proxyRemoteImage.do?remoteURL=<bean:write >name="thisForm" property="remoteURL"/>" width="300" height="300" >border=0> > >Semi/Pseudo Code for proxyRemoteImage.do action: >URL theRemoteImageURL = New URL(yourForm.getRemoteURL()); Open >theRemoteImageURL Get Response If Response Code good shove content, >content type and all the other stuff you need into your response of >your users request(that might get rid of you having to handle file type
>conditions). >If Response Code is bad, get the no image file data and shove that into
>the response instead Return null from execute method. > >I am sure you can gather upsides and downsides to the proxy-like >solution. Just thought I would throw it into the pool of options. Not
>a great option but at least as simple I think. Not sure if you >consider it more flexible or not. > >Hope you find what your looking for. > > >-----Original Message----- >From: CRANFORD, CHRIS [mailto:[EMAIL PROTECTED] >Sent: Tuesday, June 15, 2004 4:44 PM >To: '[EMAIL PROTECTED]' >Subject: RE: Rendering Images > >Ken, > >That is what I'd like to do. Have an image which is rendered in the >case >when the defined image cannot be loaded. the problem I have is that >our database record says that an image should exist, but the >manufacturer/supplier didn't provide it to us... thus I need a way to >check if that image does exist to test that condition. > >thanks, >chris > >ps - these images are maintained by a second webapp that is on a >different web server all together due to space requirements. so i have
>to do testing via a HTTP request or something i would think, no? > >-----Original Message----- >From: Linck, Ken >To: [EMAIL PROTECTED] >Sent: 6/15/2004 2:32 PM >Subject: RE: Rendering Images > >Just curious but why not just manually make this file once and return >it when a real image is not found on disk? Why bother creating one on >the fly every time? Is it different from request to request? > >We had done something similar. We created a static image file on disk >and return that when a real one is not available. I think we used a >struts condition if tag testing if a real one exists otherwise use the >URL to not found image. > >-----Original Message----- >From: CRANFORD, CHRIS [mailto:[EMAIL PROTECTED] >Sent: Tuesday, June 15, 2004 1:21 PM >To: '[EMAIL PROTECTED]' >Subject: Rendering Images > >I'm curious if anyone has used or knows of an open-source image >rendering servlet that permits rendering a "no image found" image file >if the referenced image to be rendered does not exist on disk. > >Thanks > >_______________________________________________________ >Chris Cranford >Programmer/Developer >SETECH Inc. & Companies >6302 Fairview Rd, Suite 201 >Charlotte, NC 28210 >Phone: (704) 362-9423, Fax: (704) 362-9409, Mobile: (704) 650-1042 >Email: [EMAIL PROTECTED] > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [EMAIL PROTECTED] >For additional commands, e-mail: [EMAIL PROTECTED] > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [EMAIL PROTECTED] >For additional commands, e-mail: [EMAIL PROTECTED]
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