CODEWITHSUNDEEP
javagrailsgroovyframeworks
DonX
DonX

Reputation: 16367

image uploading in grails

I am new to grails.I am doing web application that uploads the image from client side and it stores that in server.

My Gsp code is:

<g:uploadForm action="saveImage">
<input type="file" name="image"> 
<input type="submit" value="Submit">
</g:uploadForm>

My saveImage action in controller is:

def saveImage={
def file = request.getFile('image')
        if (file && !file.empty) {
            file.transferTo(new java.io.File("image.jpg"))
            flash.message = 'Image uploaded'
            redirect(action: 'uploadImage')
        }
}

In this code if i upload some other files like text files it throws Exception.For that i want to check the file Extension and I want to use If loop that ensures the uploaded file is image file or not.But i dont know how to find the file extension in grails.

Is there any other way to upload images in grails application.It has to accept only image files.

can anyone provide help?

thanks.

Upvotes: 3

Views: 7195

Answers (6)

Sergey Ponomarev
Sergey Ponomarev

Reputation: 3191

You can use Files.probeContentType(filePath) to determine file type

Upvotes: 0

Sree
Sree

Reputation: 21

if(params?.photo?.getContentType()=='image/jpeg' || 
   params?.photo?.getContentType()=='image/gif' ||
   params?.photo?.getContentType()=='image/png' || 
   params?.photo?.getContentType()=='image/bmp'
)

I think you can try this

Upvotes: 2

Eugene
Eugene

Reputation: 485

There is a small problem with file.getContentType(). The way Windows and other systems handle it differ.

For example a .csv file will be text/plain in other systems, but application/vnd.ms-excel on Windows.

Upvotes: 1

fluxon
fluxon

Reputation: 548

Okay, this is really late. But what I found the best solutions (as extensions don't really say something about the content) was to use file.getContentType() ...

E.g., for jpeg images the return value will be a string image/jpeg that you can easily test. Same for other file formats (png, gif, ...).

Hope this helps.

Upvotes: 0

GoldenDuck
GoldenDuck

Reputation:

Getting file extension from file.getOriginalFilename() works good.I think that is the better way.

Upvotes: 3

goldenfish
goldenfish

Reputation:

I dont know the following answer is a right way to find the extension of the file.I am also new to this.But this answer is working

Use file.getOriginalFilename() method.It returns a string like "test.jpg".Then you split the filename using tokenize method by ".".Then you take the last string element from the splitted list.That is extension of the file.Now you can do the remaining process.

Upvotes: 7

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