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POGrails error using HttpServletResponse to export file for download
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13184603
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2012-11-01T20:01:04.917
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2013-10-25T13:26:39.657
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I am using <a href="http://opencsv.sourceforge.net/" rel="nofollow">opencsv</a> in my Grails application to export attributes from my Person domain class to CSV. I am receiving the following error, however: Servlet.service() for servlet [default] in context with path [/myapp] threw exception [Request processing failed; nested exception is org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error processing GroovyPageView: getOutputStream() has already been called for this response] with root cause Message: getOutputStream() has already been called for this response From searching online, I think the answer may be to implement some responseComplete() method somewhere for the HttpServletResponse response. However, I am not sure how to do this. Any ideas? Here is my code: <pre><code>def export = { def course = Course.get(params.id) if(course){ def persons = course ? Person.findAllByCourse(course) : [] response.setHeader("Content-disposition", "attachment; filename=people.csv") response.contentType = "text/csv" def out = response.outputStream out.withWriter { writer -> String[] properties = new String[3] def csvWriter = new CSVWriter(writer) persons.each { person -> properties[0] = person.firstName properties[1] = person.lastName properties[2] = person.email properties[3] = person.phone properties[4] = person.address1 properties[5] = person.address2 properties[6] = person.city properties[7] = person.state properties[8] = person.zip5 csvWriter.writeNext(properties) } csvWriter.flush() } } </code></pre>
Tags
<grails><groovy><opencsv>
Title
Grails error using HttpServletResponse to export file for download
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