How to save uploaded image - grails

Question

I'm wondering how I could save an uploaded image in grails.
The situation:
I have a gsp page with a form, containing a file upload. I tried to get the data from the fileupload, but it just won't work.
In the controller:
def file = request.getFile('fileupload')
appearanceInstance.logo = file.encodeAsBase64().toString()
In the view:
<g:form action="save" enctype="multipart/form-data">
<div class="file-upload">
<label >Choose logo</label>
<input id="fileupload" type="file" name="fileupload" onchange="handleFileSelect(this)"/>
</div><br/>
<br/>
</g:form>
Anyone who had experience with this?
this might be another way to do it, but since I adapt an in the view when an image is selected using the file upoad, can I get the image data from the in the controller?
Thanks in advance!
UPDATE:
to be clear, there are some other controls in the form, from which I get the other parameters to save.

Answer 1

I guess this example Simple Avatar Uploader will answer all your questions

Answer 2

try this i hope this will help you it works for me also see this post
Class SomeController{
def uploader(){
}
def save(){
String s=""
CommonsMultipartFile f=request.getFile('fileupload')
final String name =f.getOriginalFilename()
def fos= new FileOutputStream(new File(name))
f.getBytes().each{ fos.write(it) }
s=Base64.encode(f.getBytes())
fos.flush()
fos.close()
render 'done now refresh your source directory to see the file ${s}'
}
and the view 'uploader.gsp'
<g:form action="save" enctype="multipart/form-data">
<div class="file-upload">
<label>Choose logo</label> <input id="fileupload" type="file"
name="fileupload" />
</div>
<input type="submit" class="buttons" value="Upload" />
</g:form>

Answer 3

Hi try with this one .
def save = {
def requestInstance = new Request(params)
def requestNumberInstance = new RequestNumber()
if(requestInstance.validate() && requestInstance.save(flush: true)){
println "Saved successfully with ${requestInstance.picture1.length} bytes"
}
else {
println "Save failed"
}