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Sat, Sep 28 2013 3:41 AM | Permanent Link |
Steve Gill | Hi Tim,
The TFileUploadButton can be used to select a file, but is there any way to select a folder? I have embedded a web server into a Windows service, and I'm using EWB for the browser interface. The interface will allow a user to specify various settings and I want the user to be able to select folders as part of this. Thanks, Steve |
Sun, Sep 29 2013 4:44 PM | Permanent Link |
Matthew Jones | <Steve Gill> wrote:
> Hi Tim, > > The TFileUploadButton can be used to select a file, but is there any way > to select a folder? > > I have embedded a web server into a Windows service, and I'm using EWB > for the browser interface. The interface will allow a user to specify > various settings and I want the user to be able to select folders as part of this. I don't know if a browser can show a folder selector, but the main consideration must surely be that the service may not have permissions to the same folders as the user. I'd suggest that you get a list of folders from the service, and make a UI in EWB from that. -- Matthew Jones |
Mon, Sep 30 2013 1:27 AM | Permanent Link |
Steve Gill | Hi Matthew,
<< ...but the main consideration must surely be that the service may not have permissions to the same folders as the user. >> That's always a possibility but I've never had problems with any of the Windows services that have been in use by my clients for several years now. << I'd suggest that you get a list of folders from the service, and make a UI in EWB from that. >> Thanks but I'm not sure if that would be practical. That could be a lot of folders. - Steve |
Mon, Sep 30 2013 9:59 AM | Permanent Link |
Raul ![]() | On 9/28/2013 3:41 AM, Steve Gill wrote:
> The TFileUploadButton can be used to select a file, but is there any way to select a folder? > I have embedded a web server into a Windows service, and I'm using EWB for the browser interface. The interface will allow a user to specify various settings and I want the user to be able to select folders as part of this. I assume this if to return a folder on the client computer (one running EWB and browser)? If so AFAIK it's not possible with the normal browser permissions - browser sandboxing prevents exposing even folder names in general (file upload button should see just filename and no info on path). Using something very specific (for example IE and manually disabling enough security settings by allowing scripts and such to run) might allow something like this to work though i don't have specific examples. Or embedding java or flash btu then you still would need to communicate back to ewb app. Raul |
Mon, Sep 30 2013 8:11 PM | Permanent Link |
Steve Gill | << I assume this if to return a folder on the client computer (one running
EWB and browser)? If so AFAIK it's not possible with the normal browser permissions - browser sandboxing prevents exposing even folder names in general (file upload button should see just filename and no info on path). Using something very specific (for example IE and manually disabling enough security settings by allowing scripts and such to run) might allow something like this to work though i don't have specific examples. Or embedding java or flash btu then you still would need to communicate back to ewb app. >> Ok, thanks Raul. Perhaps I'm misunderstanding this whole thing but, from *within a browser*: * I can navigate through drives and folders to select a file to upload. * I can download a file from a website and save it on my computer, navigating to a folder on whatever drive I like. * But I can't just select a folder? - Steve |
Tue, Oct 1 2013 9:55 AM | Permanent Link |
Raul ![]() | On 9/30/2013 8:11 PM, Steve Gill wrote:
> Ok, thanks Raul. Perhaps I'm misunderstanding this whole thing but, from *within a browser*: The actual browser executable yes has access to your local drive. Not the JS apps running inside the browser sandbox. if JS had this access it would result in all kinds of security issues - apps sniffing your file system etc. In general there is no file system access at all from JS. You'd have to > * I can navigate through drives and folders to select a file to upload. Yes but this is done by the browser (not your app) and once you select the file the browser even removes all folder related info so once you JS app gets the info back it just gets the file content and name (and possibly mime type). > * I can download a file from a website and save it on my computer, navigating to a folder on whatever drive I like. Again the browser handles that - you can't do it from JS direct. > * But I can't just select a folder? Not at the moment. Main reason is that it's not a common nor useful feature for the web apps. I do realize it's important to you but in general JS apps can't do anything with it (even if they knew the folder there would be no way to read or even list files) and it's of course platform specific (windows and linux paths are different and on mobile device this might not even be supported to be being with). HTML5 is adding a FileSystem API but i believe it's again special sandboxed version and not full file system. If you need it today AND your customers run IE AND you can have them allow scripts to run you could look into Windows Script Host to accomplish this. Using something like this : http://www.zhihua-lai.com/acm/vbscript-browse-for-folder-using-shell-application-object/ and then WSH access would be similar to the way ShellEecute discussion went here: http://www.elevatesoft.com/forums?action=view&category=ewb&id=ewb_general&msg=3636&page=1 I have not tried but the other issue will be getting the path back. Other options are custom browser extension that you could access (but you'd have to write it and would work with that browser only) or embedded Flash or Java applet (would need runtimes again for those). Raul |
Tue, Oct 1 2013 9:34 PM | Permanent Link |
Steve Gill | Hi Raul,
Makes sense. Thanks for the detailed explanation. - Steve |
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