Grails Programmer: How to output CSV from a Grails 3 Controller. 20 / 1 Reply def outs = Stream. = (). response. Should I invoke a flush or a close on the outpustream at the end of the closure? () or You can send a binary response to the client using standard servlet API calls such as () } The code uses the response object’s outputStream.

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Grails will try to determine the content type for files, but we can also use the contentType attribute to set the content type.

What happens is that whenever I access it, Firefox fires up Totem plugin which streams the file from the controller.

I have a Grails application that I have recently upgraded to 3. On Wed, Jul 30, at 1: In the following controller we find an image in our application using grailsResourceLocator. A simple page with download link is shown: If that’s the case, copy from stream response.outputstrwam stream. Render Binary Output with the File Attribute. Does anyone have any suggestions for me? The BootStrap init closure runs when the app starts.

Creating a Graisl file for download is easy. This is nice and clean and works just fine. If the byte arrays in your examples are large, or if the ‘download’ action is called frequently, you could run into problems. Sign up using Email rewponse.outputstream Password.

CSV is probably the best format to export your data from a Grails App. I probably came across the same post The code now appears as response. In a controller I have graile method that appends a string to the response.


Nov 18, Example Application comments. Since Grails 2 we can render binary output with the render method and the file attribute. Search everywhere only in this topic.

Email Required, but never shown. I wrote a post; in Spanish though. This will also set a response header with the name Content-Disposition with a the filename as value. Most browser will then responsf.outputstream download the binary content, so it can be saved on disk. Other than that, so far things are ok.

Grails Goodness: Render Binary Output with the File Attribute – Messages from mrhaki

My code is only a little different, in that I don’t set the “Content-disposition” header and flush afterwards. September 5, Grails Goodness: The first file is just a plain text file: Use TAB for completion: The file attribute can be assigned a byte[]FileInputStream or String value.

I was tired of my clients asking me how to import a CSV in Excel. Render the download page The controller and view code to display the download page should be simple: Generally things are working but today we ran across a problem that seems to be shared by others but I cannot find a solution.

ServletOutputStream to make this work. I will then get an IllegalStateException: Then we use the render method and the file and contenType attributes to render the image in a browser: Free forum by Nabble. Based from this, it is easy to modify the sample to put different types of files inside the output ZIP. Creating a file inside the zip is accomplished by instantiating a ZipEntry and put it inside the ZIP file.


Grails will try to find the content type based on the extension of the filename.

Grails Programmer : How to output CSV from a Grails 3 Controller

You gralls need to add additional method signatures so that they can be statically compiled but the concept is the same. I know we worked on this one for a while!

Sign up or log in Sign up using Google. On Wed, Jul 30, at 2: On click, a download confirmation will be shown instead of the browser trying to render the content: Notify me of new posts by email. Leave a Reply Cancel reply Your email address will not be published.

I should add that I had tried a similar approach following another StackExchange post maybe yours? Lauk To unsubscribe from this list, please visit: By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. A CSV file is easy to import in Excel. Newer Post Older Post Home.

Daniel 1, 1 3 Just instantiate ZipOutputStream passing response.