Unable to upload file via REST request in GRAILS - rest

Question

I am trying to upload a file via REST using GRAILS
curl -X POST -H "Cache-Control: no-cache" -H "Postman-Token: d5d7aef8-3964-311b-8b64-4a7a82c52323" -H "Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW" -F "file1=myfile.jpg" -F "fname=swateek" -F "lname=jena" 'http://localhost:8081/sampleFileREST/document/upload'
Here's how my controller looks like:
class DocumentController extends RestfulController<Document> {
static responseFormats = ['json', 'xml']
def upload() {
def fileLocation="<xml>empty</xml>"
def file = request.getParameter('file1')
def f1 = request.getParameter('fname')
def f2 = "<abc>"+request.getParameter('lname')+"</abc>"
def params = "gf"
if(file.empty) {
fileLocation = "<xml>"+"File cannot be empty"+"</xml><allprm>"+params+"</allprm>"
} else {
def documentInstance = new Document()
documentInstance.filename = file.originalFilename
documentInstance.fullPath = grailsApplication.config.uploadFolder + documentInstance.filename
file.transferTo(new File(documentInstance.fullPath))
documentInstance.save()
fileLocation = "<xml>"+documentInstance.fullPath+"</xml>"
}
/* return "File uploaded to: "+documentInstance.fullPath */
render(text: fileLocation, contentType: "text/xml", encoding: "UTF-8")
}
}
I am able to access the parameters of the request, anything except the file I am sending in the request.
Unable to figure out what's wrong here.
UPDATE
I had used .getParameter() to fetch a file. That's incorrect, the correct way is as below:
request.getFile('<filename>') // without the <>
This might raise an error in IntelliJ as "Symbol Not Found" or "Cannot Resolve Method", please follow the procedure in the answer below.

Answer 1

Damn the IDE that I was using, IntelliJ.
Also, this piece of code while getting the file:
def file = request.getParameter('file1')
should be replaced as
def file = request.getFile('file1')
Now previously, when I was using the request.getFile() method I was getting an "Symbol Not Found" error and it was failing to execute the request.
Solution:
Open IntelliJ
Click on "File"
Find the option "Invalidate Caches/Restart" and wait for IntelliJ to come back again.
If this doesn't work, the other way is mentioned in this answer:
IntelliJ IDEA JDK configuration on Mac OS