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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 GRAILS IllegalStateException error for return the Stream # Closed. graemerocher opened this Issue on Oct 29, ยท 0 comments.

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GrailsConfigurationAware import static org. The BootStrap init closure runs when the app starts. Most browser will then automatically download the binary content, so it can be saved on disk.

On Wed, Jul outuptstream, at 2: Leave a Reply Cancel reply Your email address will not be published. Stack Overflow works best with JavaScript enabled. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you graila read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

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

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If I recall correctly, the left shift operator here uses some annotation or something clearly I don’t remember details! Daniel 1, 1 3 I’m glad it was useful to you, and thanks for the additional info for anybody else who needs this! The file attribute can be assigned ouutputstream byte[]FileInputStream or String value.


For reference in case others stumble over the same problem, I had to import groovy. In reply to this post by Lauk Daniel. A CSV file is easy to import in Excel. This is nice and clean and works just fine. I have found it beneficial to use some of the new ‘Groovy’ methods on the File class in particular the File.

If that’s the case, copy from stream to stream. Then we use the render method and the file and contenType attributes to render the image in a browser: Does anyone have any suggestions for me? Sign up or log in Sign up using Google.

By clicking “Post Your Answer”, you acknowledge that outpytstream have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. A I will recommend to put the logic fetching the lines in a Service. I believe I’ve read somewhere that I might be able to cure this problem by replacing Tomcat7 with Tomcat8; however right now I’m running Ubuntu Grails will try to determine the content type for files, but we can also use the contentType attribute to set the content type.

Anyway, this is what I do and it works fairly well for me: The code now appears as response. We can use the fileName attribute to set a filename for the binary graild. I have a Grails application that I have recently upgraded to 3. If the answer is yes, subscribe to Groovy Calamari. I know we worked on this one for a while! Hi all, I have a controller which would stream file as response.

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If we run the app and call the controller we will download a CSV file as this: I wrote a post; in Spanish though. I also typed the methods as void perhaps I am still too Java-fussy? Stream whenever I close the window before the grauls audio file gets to play.

Grails User (Old Archive) – Proper way to stream file from controller

Dynamic Productivity for the Java Developer’, author: Rresponse If you want the file to download you need to setup the Content-disposition header. Your email address will not be published. Search everywhere only in this topic.

Outpuystream the byte arrays in your examples are large, or if the ‘download’ action is called frequently, you could run into problems. Are you facing any problems with that?

I was tired of my clients asking me how to import a CSV in Outputstreamm. I will then get an IllegalStateException: Generally things are working but today we ran across a problem that seems to be shared by others but I cannot find a solution. You can fix this by adding CompileStatic to your method, but that is not always feasible.

CSV is probably the best format to export your data from a Grails App. Since Grails 2 we can render binary output with the render method and the file attribute. Thanks If you are using Grails 2, just change the grakls part to this: