I'm using nativescript-imagepicker to pick an image from the gallery and then send that file as an attachment using nativescript-email.
For some reason I didn't get the permissions dialog (Android) - no matter.
After an image is picked, I get something like this in
content://com.android.providers.media.documents/document/image%3A742
What I'd like to do is take this uri and pass to nativescript-email and use it as an attachment. The problem seems to be that the email plug-in doesn't seem to understand that format and also that path doesn't seem to be a physical path.
So I have to copy the image to my folder and then send it from there. That seems like a waste of storage and time.
Any way to convert that content uri into a physical path that can be used by the email plug-in.
Barring that, I can copy the file via imageSource.getImage(). Can I set the file dimensions? Looks like I can set the quality. No documentation on that. I assume that sets the quality and not the dimensions.
Thanks.
Related
I'm getting the thumbnail of a document using file.get API, which is stored the field thumbnailLink in the drive response. But after some time, I get only a broken image.
Could you please let me know the exact expiration time of the thumbnail, which determines the expiration time and how to extend it? We can download the thumbnail image, store it in the cloud and then use it. But since the users are many and the documents are many and the thumbnail varies based on the changes, so I don't think this would be a better approach. I wanted to know whether we have any workaround to fix this issue? Do we have anything to play with the google cache? If so, how to do? will this be a permanent solution
As stated in the documentation
Important: Thumbnails are invalidated each time the content of the file changes. When supplying thumbnails, it is important to upload new thumbnails each time the content is modified. Metadata changes do not invalidate thumbnails.
The google drive thumbnail image link changes the file is changed.
You will need to refresh it if the link is bad by doing a file.get or upload new thumbnail image metadata whenever you change the file.
I am working on an xpages app, where the client wants to restrict the size of images that are pasted into the document. I have restricted docs with the upload component, but not with a pasted image.
Has anyone done anything like this?
Thanks
walt
Yes it is possible, I haven't done this but there are a few ways you could go about it.
Excuse me if you already know this, but it is worth pointing out for anyone who comes across this question in the future, RichText as we knew it from Notes/Domino is not used XPages, it is all MIME. When I started Xpages I knew nothing about MIME so after understanding it all I have written a little summary on my blog to help anyone get used to the idea. If you are going to do anything with the InputRichText control and File Uploads etc. it is worth getting familiar with MIMEEntity's.
http://camerongregor.com/2016/04/21/webmail-ui-you-must-learn-about-mime/
There are 2 ways that images can make it into the 'rich text field', either uploaded using the 'Image' button on the editor toolbar, or alternatively in some web browsers, the image can be pasted from the clipboard. The 2 different methods will include the image in 2 different ways
Uploaded
If the image is uploaded, then the image becomes a multipart/related mime entity of some sort of image/jpeg, image/png etc., related to the text/html. Between the time that the image is uploaded, and the time that the Document is saved, the image file will be located on the server's disk, in the xpages persistence folder associated with the Document e.g.
xsppers_directory/application-id/session-id/document-id/someimage.png
Pasted
When pasted the image is not uploaded as a file to the server's persistence folder, but is instead included within the text/html as a data URI image (as Stephan mentioned in the comment above).
So, if you want a true solution you will need to address both avenues.
Handling Pasted images
I have shared a plugin on my blog which blocks pasted images, so this could be used to eliminate the 'paste' avenue altogether, and force users down the upload avenue.
http://camerongregor.com/2016/11/14/preventing-pasting-of-images-in-ckeditor/
Alternatively, if you are happy with having smaller pasted images, you could just 'restrict' it by modifying the plugin so that it checks the 'length' of the data URI (as Stephan suggested above) and allows the paste if the length is below your predetermined limit.
If even more alternatively, you could find some sort of client side javascript library that will resize images and do it there in the client before the paste.
Or another server-side option is you could process the contents of the 'text/html' MIMEEntity when saving, and find any img tag's that used Data URI's and strip it out, resize the image using some server side library such as ImageMagick and replace it.
Handling Uploaded Images
For uploaded images, an intense solution would be to extend the InputRichText control (similar to how the have demonstrated in the Mastering Xpages 2nd edition) and override the processAjaxRequest event so that it resizes the image during the process of uploading of the image and putting it in the persistence folder. You could resize it there and then using something like ImageMagick.
Or a less intense version would be to process the 'pending' attachments during a before save event. If you get the DominoRichTextItem from the DominoDocument, you should be able to iterate through the Attachments, checking their attachment state, there will be a state which means 'pending/about to upload' and for these ones you can process them while they are in the persistence folder, before they are finally attached to the document.
Finally if you don't want the xpages runtime / persistence directory to be involved, you could do it all after save, just using the backend NotesDocument and MimeEntity processing. Extract the Image MimeEntities to disk, process them with ImageMagick or similar, and then re-attach them.
Someone else may have a simpler solution that I haven't thought of but at least this gives you some idea of what may be involved.
If i have a filename for a local file on the computer:
$img = "deskfile:///D%3A%2FSCANS%2F%23AUKT%2Fimg2014%2F2014-06+SP%2FEPSON007.jpg"
how can i upload it the server without using the "file selector"?
If i enter the file adresses in the url window of a browser i can display the image.
But if i load the image in tag they won't display. I've read it's becuse of restrictions in the browser.
I can't add a value caluse to the either.
Is there anyway to upload the image from the string?
Or can i at least open the correct directory in the "file selector" so the user wont have the browse the whole computer when looking for the file?
Yes there is a way. You can use the File API with Html5 and/or a polyfill for this to load the image in the browser before posting it back to the server. The best such polyfill that I know of is called Moxy/Plupload. It includes Flash and Silverlight fallbacks for older browsers.
You can display the image because it is stored locally in your computer. How do you know where is the image going to be in the user's computer. The only way to access the user's file system is through the file selector, once the user has selected a file you can then use any API to save that file in the server on your terms, but you will not be able to see each of your users file system from you page (security reasons). Could you elaborate more in what you are trying to accomplish? What exactly are you trying to do?
I am implementing a project to my site to allow users to upload image files (ai, pdf, jpeg, gif, tiff). I know this can be very risky but I was wondering what kind of security checks I should put in place to make sure these files to not cause my site any harm.
OR
Should I use something like dropbox to upload my images? If I do this is it possible to get these images whenever I want so I can display them within the browser to the user?
image uploads are fine, because you know what you want: An image
First rule is never to trust the client, so let the user upload the file (maybe you want to add an upload size limit).
Second, you have to ensure that the image is really an image so
Check the mime-type of the file (don't go by the file extension, use a real mime type check like the file shell command or an appropriate library)
To really make sure the file is OK, Open and Reprocess it using an image library like GD, ImageMagick etc. and save it to disk (keep in mind this needs some resource!). This will also filter out corrupted images.
An uploaded file usually doesn't harm the site itself but the users who download the file.
I've come across with a file uploading part of a project I worked.
Some high-level suggestions to complement sled's answer:
The mime type is set on base of the file extension, so it's no useful (as the file has not been uploaded yet to the server, the mime type is just a 'guess' in base of his extension).
So solutions would be:
Do the content check client-side (before sending the http-request)
When you get the whole file by HTTP do the check server-side before persisting to the disk.
Other Suggestions:
The simple file extension check
(wheter by filename or mime-type) is
the basic secutiry measure that also
has to be present.
Folder permissions: Don't allow execute permissions, don't allow the user to create new folders (as it might create a sub-folder with executing permissions).
I am trying to extract images from flash on the following web-site: http://meijer.shoplocal.com/meijer/default.aspx?action=entryflash&storeref=120
I noticed that every time I click on "Next image", an images is requested from sever. Sample URL is http://akimages.shoplocal.com/dyn_rppi/740.0.75.0/meijer/large/110206os_o_003_T1C1_2pw26.jpg
So, this URL is exactly what I need, but I don't know how to extract all these URLs from the .swf file I have. I don't have any experience with flash, but I think that URLs should be in the .swf file. I tried "grep '110206os_o_003_T1C1_2pw26' adspage_slider-2.swf", but didn't get any result :(((
Ivan,
Did you try a Flash decoder? It should allow you to access the code and respective resources. Another possible and easier way would be to use Fiddler2 to extract the URLs that you have clicked from the swf file. Still, before you move further, make sure that you're not breaking any of the site's Terms and Conditions.