I think to use GWT's version of tomcat because application it's not implemented for business world, but only for my thesis. However link it's good to bookmarks! :)
2009/1/7 Nick <[email protected]>: > > Gregor wrote "if you want to create a directory somewhere else on the > host machine > disk (i.e. not part of the Tomcat set up) to store the images you need > to do more work. " > > You can add your external directory to tomcat's path. So basically D: > \images could be pathed to localhost:8080/YourApp/images > Then you can access them very easily using GWT by creating an Image > object and calling setURL("images/mycat.jpg"); > Look at this to set up your path: > http://whatwouldnickdo.com/wordpress/157/tomcat-images-directory/ > > > On Jan 6, 12:06 pm, gregor <[email protected]> wrote: >> I think the public part is assumed. If yourimagesare located in >> public/category then they should be accessible via the URL: >> >> String imageURL = GWT.getModuleBaseURL() + "category/" + fileName; >> >> if you want to create adirectorysomewhere else on the host machine >> disk (i.e. not part of theTomcatset up) to store theimagesyou need >> to do more work. You could use an ordinary HttpServlet (not a GWT RPC >> servet) to do it, something like: >> >> // assume you have passed "category" and "imageFileName" as >> parameters to the servlet. >> // in HttpServlet.doGet(..) >> FileInputStream in = new FileInputStream(new File(UPLOAD_DIRECTORY/ >> + category/ + ImageFileName)) >> response.setContentType("image/jpeg"); // or gif,png etc >> OutputStream out = response.getOutputStream(); >> try { >> byte[] buffer = new byte[1024]; >> int len; >> while ((len = in.read(buf)) > 0) { >> out.write(buffer, 0, len); >> } >> in.close(); >> out.close(); >> } catch (IOException e) { >> // do something >> } >> >> The effect of that it to make the browser believe it's just getting an >> image from a URL. You can't use GWT RPC because it won't deal with >> binary data (e.g. an image file). Look up "HttpServlet image download" >> on Google for examples. >> >> On Jan 6, 4:00 pm, Daniele <[email protected]> wrote: >> >> > I put category folder under public/ folder. >> > Same problem. >> > I do set UPLOAD_DIRECTORY with >> > ./src/com/webphotogallery/public/category because only public/category >> > doesn't work. >> >> > I try to create a tempdirectoryon /home/dany/TESI/project and we'll >> > put indirectoryimagesthat I use in my application >> >> > Daniele >> >> > 2009/1/4, gregor <[email protected]>: >> >> > > Hi Daniele, >> >> > > Your problem is that: >> >> > > private static String UPLOAD_DIRECTORY = >> > > "./src/com/webphotogallery/server/category/"; >> >> > > does not exist under the temporary GWT dev shellTomcatinstance >> > > created when you run hosted mode, whatever your development >> > > environment. To sort this out you will have to think through where in >> > > a production environment the photos would actually be stored. >> >> > > To do this quick and get it to work in hosted mode, I think if you put >> > > them under the /publicdirectoryrather than /server, it might do the >> > > trick. >> >> > > regards >> > > gregor >> >> > > On Jan 4, 1:13 pm, Daniele <[email protected]> wrote: >> > >> It's doesn't work. >> > >> My projectdirectorystructure is: >> >> > >> /home/dany/TESI/projects/WebPhotoGallery/ >> > >> -- build/ >> > >> -- src >> > >> -- com >> > >> -- webphotogallery >> > >> -- server >> > >> -- category >> > >> -- [...] >> > >> -- client >> > >> -- public >> > >> --tomcat >> > >> -- WebConten >> >> > >> (I use Eclipse with Cypal studio plugin) >> >> > >> On servlet, the code for create categorydirectoryis: >> >> > >> private static String UPLOAD_DIRECTORY = >> > >> "./src/com/webphotogallery/server/category/"; >> > >> [...] >> >> > >> if((it.getFieldName().equals("categoryBox"))){ >> > >> String categoryFolder = it.getString(); >> >> > >> UPLOAD_DIRECTORY = UPLOAD_DIRECTORY + >> > >> categoryFolder; >> > >> [...] >> > >> where categoryFolder is passed by client with a form. >> > >> But when I call setURL() method on client, what URL I >> > >> put??http://localhost:8888/com.webphotogallery.WebPhotoGallery/category/ca... >> > >> not works. >> >> > >> I'm totally disoriented. >> >> > >> Thanks. >> >> > >> Daniele. >> >> > >> 2008/12/28 Daniele <[email protected]>: >> >> > >> > Sorry, but I'm newbie of servlet & GWT...I'm here for learning GWT and >> > >> > servlet :) >> > >> > I try. >> > >> > Thanks. >> >> > >> > Daniele. >> >> > >> > 2008/12/28 rakesh wagh <[email protected]>: >> >> > >> >> Cannot comment on what you are doing wrong without looking into the >> > >> >> code. However I see no need for setUrl on server side. You should >> > >> >> have >> > >> >> a "Servlet" that will parse the parameters, read the appropriate >> > >> >> image >> > >> >> file(either file system or db or any doc mgmt system for that >> > >> >> matter), >> > >> >> set a proper content type and just spit out the byte stream. >> >> > >> >> From the client just call this servlet with appropriate params for it >> > >> >> to retrieve the image. In essence: >> > >> >> Image img = new Image(); >> > >> >> img.setUrl("/servlet?photoId=39934&width=50"); >> >> > >> >> Rakesh Wagh >> >> > >> >> On Dec 26, 4:26 pm, Daniele <[email protected]> wrote: >> > >> >>> I cannot planning image manipulation. >> > >> >>> Ifimagesare on client sides, setUrl() etc it works. >> >> > >> >>> On server side, I have an undefined number of folders that represent >> > >> >>> photo category, but if I put on setUrl() method path to folders on >> > >> >>> server, it's not work. >> >> > >> >>> 2008/12/26 rakesh wagh <[email protected]>: >> >> > >> >>> > ask yourself: >> > >> >>> > Even if you get your image/files using rpc, what will you do with >> > >> >>> > it? >> > >> >>> > I mean there is no real application of getting binary files using >> > >> >>> > rpc >> > >> >>> > yet. Are you planning to do image manipulations like rotation, >> > >> >>> > filters, etc on the client side? js is not yet ready for that. >> > >> >>> > However >> > >> >>> > if you wish, you can get the entire file using rpc method. But >> > >> >>> > sticking it to the image tag is very difficult. Search through the >> > >> >>> > group, some one mentioned how you can embed the actual bytes and >> > >> >>> > construct a img tag that will display the image. Good luck, >> > >> >>> > because >> > >> >>> > that is very non standard and your millage can greatly vary. >> >> > >> >>> > You might also want to look at Gears, it allows you to store and >> > >> >>> > retrieve Blobs in client database... not sure if it has to do >> > >> >>> > anything >> > >> >>> > with your requirement but will come handy if you are playing a lot >> > >> >>> > with files etc. .. >> >> > >> >>> > Rakesh Wagh >> >> > >> >>> > On Dec 24, 8:01 am, Daniele B <[email protected]> wrote: >> > >> >>> >> Hi. >> > >> >>> >> I work on a photogallery application for my thesis. >> > >> >>> >> I have a problem. >> > >> >>> >> How can I do to retrieve image files stored on a server folder >> > >> >>> >> trought >> > >> >>> >> GWT-RPC? >> >> > >> >>> >> Thanks at all! >> > >> >>> >> Sorry fo my english!!! :) >> >> > >> >>> >> Daniele. > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~----------~----~----~----~------~----~------~--~---
