uploading a file in grails - grails

Question

I am trying to upload a file in grails in my gsp I have:
<g:form id="update" url="[action: 'updateStatus',]">
<g:textArea name="message" value="" cols="3" rows="1"/><br/>
<g:textField id="tagField" name="tag" value=""/><br/>
<input id="inputField" type="file" name="myFile" enctype="multipart/form-data" />
<g:submitButton name="Update Status"/>
</g:form>
In my controller i have:
def updateStatus(String message) {
if (params.myFile){
def f = request.getFile('myFile')
}
The request get file is failing with this error:
No signature of method: org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestWrapper.getFile() is applicable for argument types: (java.lang.String) values: [myFile]
Any ideas why this is as I have and are using getFile in my other controllers which works fine.

Answer 1

here is working file submit:
the form (gsp)
<form method="post" enctype="multipart/form-data">
<p><input type='file' name="cfile"/></p>
<input type='submit'>
</form>
the controller that will store submitted file into 'D:/submitted_file':
def index() {
if(params.cfile){
if(params.cfile instanceof org.springframework.web.multipart.commons.CommonsMultipartFile){
new FileOutputStream('d:/submitted_file').leftShift( params.cfile.getInputStream() );
//params.cfile.transferTo(new File('D:/submitted_file'));
}else{
log.error("wrong attachment type [${cfile.getClass()}]");
}
}
}
this works for me (grails 2.0.4)

Answer 2

You need enctype="multipart/form-data" on the g:form tag to make the browser use a multipart request.

Answer 3

In order to upload a file you must set the enctype on the form. To do so you can make use of the <g:uploadForm> which is identical to the standard form tag except that it sets the enctype attribute to "multipart/form-data" automatically.
I prefer to make use of the Grails Selfie Plugin an Image / File Upload Plugin to attach files to your domain models, upload to a CDN, validate content, or produce thumbnails.
Domain
import com.bertramlabs.plugins.selfie.Attachment
class Book {
String name
Attachment photo
static attachmentOptions = [
photo: [
styles: [
thumb: [width: 50, height: 50, mode: 'fit'],
medium: [width: 250, height: 250, mode: 'scale']
]
]
]
static embedded = ['photo'] //required
static constraints = {
photo contentType: ['image/jpeg','image/png'], fileSize:1024*1024 // 1mb
}
}
GSP
<g:uploadForm name="myUpload" controller="upload" action="updateStatus">
<input type="file" name="myFile" />
</g:uploadForm>
Controller
class PhotoController {
def upload() {
def photo = new Photo(params)
if(!photo.save()) {
println "Error Saving! ${photo.errors.allErrors}"
}
redirect view: "index"
}
}
Sources
1. uploadFrom
2. selfie plugin