Grails 2.3.7 redirecting controller action with flash.message, i18n and html markup
Question
I use Grails 2.3.7 and want to understand the following: I have a controller which sets a flash.message object with HTML markup from an i18n file (messages.properties) and args with no HTML markup. When I call render, the corresponding GSP renders as expected, with HTML markup. When I call a redirect to another action, that does exactly the same (calling render), the rendered GSP shows the escaped HTML markup. So what happens to the flash variable during a redirect? A simple println shows no difference. For reference, here is my code:
Controller:
class DebugController {
def testFlashEncoding(){
flash.message=message(code: "debug.flash.test", args: ["inner text with no markup"]) //debug.flash.test=<div style="border:1px solid red;">{0}</div>
flash.each {
println("flash in testFlashEncoding(): " + it)
}
// redirect(action: "index") //redirects to index(), html is rendered as text
render view: "testFlashEncoding" //renders testFlashEncoding.gsp, html is interpreted
}
def index(){
flash.each {
println("flash in index(): " + it)
}
render view: "testFlashEncoding" //renders testFlashEncoding.gsp, html is rendered as text
}
}
GSP:
<!DOCTYPE html>
<html>
<head>
<meta name="layout" content="main">
<title>DEBUG</title>
</head>
<body>
<g:if test="${flash.message}">
<div class="alert alert-success" role="status">${flash.message}</div>
</g:if>
<g:if test="${flash.error}">
<div class="alert alert-danger" role="status">${flash.error}</div>
</g:if>
</body>
</html>
So when I call the testFlashEncoding() action as shown above, the GSP is shown with a red border around the simple text. But when I use the redirect to the index() action instead, the GSP shows <div style="border:1px solid red;">inner text with no markup</div> . The println statements show the expected values:
flash in testFlashEncoding(): message=<div style="border:1px solid red;">inner text with no markup</div>
flash in index(): message=<div style="border:1px solid red;">inner text with no markup</div>
So the content of flash is not touched, but somehow during the redirect Grails has some kind of switch that tells the rendering engine to escape the flash.message object.
For clarification, I use a freshly setup standard grails application, so my page codec ist set to grails.views.default.codec = "html" and I do know about the possibilities to alter the page codec or to force raw rendering, I just want to know what happens during the redirect (that scenario happens quite often in my current project).
1 answers
solution1
0 2015-10-14 13:31:37
Try either one of these:
${raw(flash.message)}
<%= flash.message %>
Worked for me. It printed correct marked up HTML
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