Groovy Grails, How do you stream or buffer a large file in a Controller's response?
- by Julian Noye
Hi Guys
I have a controller that makes a connection to a url to retrieve a csv file.
I am able to send the file in the response using the following code, this works fine.
def fileURL = "www.mysite.com/input.csv"
def thisUrl = new URL(fileURL);
def connection = thisUrl.openConnection();
def output = connection.content.text;
response.setHeader "Content-disposition", "attachment;
filename=${'output.csv'}"
response.contentType = 'text/csv'
response.outputStream << output
response.outputStream.flush()
However I don't think this method is inappropriate for a large file, as the whole file is loaded into the controllers memory.
I want to be able to read the file chunk by chunk and write the file to the response chunk by chunk.
Any ideas?
