Displaying image in GSP (Grails), get link from database

Question

I\'m a Grails newbie. I\'m trying to show an images thumbnail for every product in a site, like this:

Answer 1

I needed a secured solution that was made in combination of http://grails.asia/grails-example-application-simple-document-management-system and http://grails.asia/grails-render-images-on-the-fly-in-gsp . For that purpouse i used a Domain where i store the path of images, a gsp to show the images and a Controller to serve the images

Domain:

class Document {
String filename
String fullPath
Date uploadDate = new Date()
static constraints = {
    filename(blank:false,nullable:false)
    fullPath(blank:false,nullable:false)
}

}

Grails Server Page:

    
        
        
    


        

            
Document List
        
${flash.message}
            
                    
                    
                
                    

                

                    

                    
            
            

                

                        
${documentInstance.filename}
                        

                        

                    
                
            
        

        

            
        
    

Controller:

import org.springframework.security.access.annotation.Secured
class DoclistController {

@Secured(['ROLE_ADMIN'])      
def list(){

    params.max = 10
    [documentInstanceList: Document.list(params), documentInstanceTotal: Document.count()]

    //render view: 'list'
}

@Secured(['ROLE_ADMIN'])      
def images(long id){
    Document documentInstance = Document.get(id)
    if ( documentInstance == null) {
        flash.message = "Document not found."
        redirect (action:'list')
    } else {

        def file = new File(documentInstance.fullPath)
        def fileInputStream = new FileInputStream(file)
        def outputStream = response.getOutputStream()
        byte[] buffer = new byte[4096];
        int len;
        while ((len = fileInputStream.read(buffer)) > 0) {
            outputStream.write(buffer, 0, len);
        }
        outputStream.flush()
        outputStream.close()
        fileInputStream.close()
    }
}
}

I show the images of database as follows

Hope this helps