Can an ASP NET MVC controller return an Image

Question

Can I create a Controller that simply returns an image asset   I would like to route this logic through a controller  whenever a URL such as the following is requested   www mywebsite com resource image topbanner   The controller will look up topbanner png and send that image directly back to the client   I ve seen examples of this where you have to create a View - I don t want to use a View  I want to do it all with just the Controller   Is this possible

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Why not go simple and use the tilde   operator   public FileResult TopBanner       return File    Content images topbanner png    image png

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Yes you can return Image public ActionResult GetImage string imageFileName        var path   Path Combine Server MapPath  quot  Images quot    imageFileName    quot  jpg quot         return base File path   quot image jpeg quot        Please don t forget to mark this as answer

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you can use File to return a file like View  Content etc       public ActionResult PrintDocInfo string Attachment                                string test   Attachment                  if  test    string Empty    test          test    null                                        string filename   Attachment Split       Last                        string filepath   Attachment                      byte   filedata   System IO File ReadAllBytes Attachment                       string contentType   MimeMapping GetMimeMapping Attachment                        System Net Mime ContentDisposition cd   new System Net Mime ContentDisposition                                               FileName   filename                          Inline   true                                              Response AppendHeader  Content-Disposition   cd ToString                          return File filedata  contentType                                               else   return Content   lt h3 gt  Patient Clinical Document Not Uploaded lt  h3 gt

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UPDATE  There are better options than my original answer   This works outside of MVC quite well but it s better to stick with the built-in methods of returning image content  See up-voted answers   You certainly can   Try out these steps    Load the image from disk in to a byte array cache the image in the case you expect more requests for the image and don t want the disk I O  my sample doesn t cache it below  Change the mime type via the Response ContentType Response BinaryWrite out the image byte array   Here s some sample code   string pathToFile     C  Documents and Settings some path jpg   byte   imageData   File ReadAllBytes pathToFile   Response ContentType    image jpg   Response BinaryWrite imageData     Hope that helps

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This worked for me  Since I m storing images on a SQL Server database        HttpGet   image  uuid         public IActionResult GetImageFile string uuid            ActionResult actionResult   new NotFoundResult            var fileImage    db ImageFiles Find uuid           if  fileImage    null                actionResult   new FileContentResult fileImage Data                  fileImage ContentType                     return actionResult          In the snippet above  db ImageFiles Find uuid  is searching for the image file record in the db  EF context   It returns a FileImage object which is just a custom class I made for the model and then uses it as FileContentResult   public class FileImage      public string Uuid   get  set       public byte   Data   get  set       public string ContentType   get  set

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Why not go simple and use the tilde   operator   public FileResult TopBanner       return File    Content images topbanner png    image png

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Use the base controllers File method   public ActionResult Image string id        var dir   Server MapPath   Images        var path   Path Combine dir  id     jpg      validate the path for security or use other means to generate the path      return base File path   image jpeg        As a note  this seems to be fairly efficient  I did a test where I requested the image through the controller  http   localhost MyController Image MyImage  and through the direct URL  http   localhost Images MyImage jpg  and the results were    MVC  7 6 milliseconds per photo Direct  6 7 milliseconds per photo   Note  this is the average time of a request  The average was calculated by making thousands of requests on the local machine  so the totals should not include network latency or bandwidth issues

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You could use the HttpContext Response and directly write the content to it  WriteFile   might work for you  and then return ContentResult from your action instead of ActionResult   Disclaimer  I have not tried this  it s based on looking at the available APIs   -

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Look at ContentResult  This returns a string  but can be used to make your own BinaryResult-like class

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You can write directly to the response but then it isn t testable   It is preferred to return an ActionResult that has deferred execution   Here is my resusable StreamResult   public class StreamResult   ViewResult       public Stream Stream   get  set        public string ContentType   get  set        public string ETag   get  set         public override void ExecuteResult ControllerContext context                context HttpContext Response ContentType   ContentType          if  ETag    null  context HttpContext Response AddHeader  ETag   ETag           const int size   4096          byte   bytes   new byte size           int numBytes          while   numBytes   Stream Read bytes  0  size    gt  0              context HttpContext Response OutputStream Write bytes  0  numBytes

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Look at ContentResult  This returns a string  but can be used to make your own BinaryResult-like class

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You could use the HttpContext Response and directly write the content to it  WriteFile   might work for you  and then return ContentResult from your action instead of ActionResult   Disclaimer  I have not tried this  it s based on looking at the available APIs   -

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This might be helpful if you d like to modify the image before returning it   public ActionResult GetModifiedImage         Image image   Image FromFile Path Combine Server MapPath   Content images     image png          using  Graphics g   Graphics FromImage image                    do something with the Graphics  eg  write  Hello World            string text    Hello World                Create font and brush          Font drawFont   new Font  Arial   10           SolidBrush drawBrush   new SolidBrush Color Black               Create point for upper-left corner of drawing          PointF stringPoint   new PointF 0  0            g DrawString text  drawFont  drawBrush  stringPoint              MemoryStream ms   new MemoryStream         image Save ms  System Drawing Imaging ImageFormat Png        return File ms ToArray     image png

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Solution 1  To render an image in a view from an image URL  You can create your own extension method   public static MvcHtmlString Image this HtmlHelper helper string imageUrl       string tag     lt img src   0    gt       tag   string Format tag imageUrl      return MvcHtmlString Create tag       Then use it like    Html Image  Model ImagePath     Solution 2  To render image from database  Create a controller method that returns image data like below  public sealed class ImageController   Controller     public ActionResult View string id          var image    images LoadImage id     Pull image from the database      if  image    null         return HttpNotFound        return File image Data  image Mime           And use it in a view like       Html RenderAction  View   Image  new  id  Model ImageId      To use an image rendered from this actionresult in any HTML  use   lt img src  http   something com image view id  imageid  gt

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if   System IO File Exists filePath       return SomeHelper EmptyImageResult       preventing JSON GET POST exception else     return new FilePathResult filePath  contentType     SomeHelper EmptyImageResult   should return FileResult with existing image  1x1 transparent  for example    This is easiest way if you have files stored on local drive  If files are byte   or stream - then use FileContentResult or FileStreamResult as Dylan suggested

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I see two options   1  Implement your own IViewEngine and set the ViewEngine property of the Controller you are using to your ImageViewEngine in your desired  image  method   2  Use a view  -   Just change the content type etc

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Below code utilizes System Drawing Bitmap to load the image  using System Drawing  using System Drawing Imaging   public IActionResult Get         string filename    quot Image test jpg quot       var bitmap   new Bitmap filename        var ms   new System IO MemoryStream        bitmap Save ms  ImageFormat Jpeg       ms Position   0      return new FileStreamResult ms   quot image jpeg quot

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You can create your own extension and do this way   public static class ImageResultHelper       public static string Image lt T gt  this HtmlHelper helper  Expression lt Action lt T gt  gt  action  int width  int height              where T   Controller               return ImageResultHelper Image lt T gt  helper  action  width  height                  public static string Image lt T gt  this HtmlHelper helper  Expression lt Action lt T gt  gt  action  int width  int height  string alt              where T   Controller               var expression   action Body as MethodCallExpression          string actionMethodName   string Empty          if  expression    null                        actionMethodName   expression Method Name                    string url   new UrlHelper helper ViewContext RequestContext  helper RouteCollection  Action actionMethodName  typeof T  Name Remove typeof T  Name IndexOf  Controller     ToString                       string url   LinkBuilder BuildUrlFromExpression lt T gt  helper ViewContext RequestContext  helper RouteCollection  action           return string Format   lt img src    0    width    1    height    2    alt    3      gt    url  width  height  alt            public class ImageResult   ActionResult       public ImageResult            public Image Image   get  set        public ImageFormat ImageFormat   get  set         public override void ExecuteResult ControllerContext context                   verify properties          if  Image    null                        throw new ArgumentNullException  Image                      if  ImageFormat    null                        throw new ArgumentNullException  ImageFormat                          output          context HttpContext Response Clear            context HttpContext Response ContentType   GetMimeType ImageFormat           Image Save context HttpContext Response OutputStream  ImageFormat              private static string GetMimeType ImageFormat imageFormat                ImageCodecInfo   codecs   ImageCodecInfo GetImageEncoders            return codecs First codec   gt  codec FormatID    imageFormat Guid  MimeType          public ActionResult Index           return new ImageResult   Image   image  ImageFormat   ImageFormat Jpeg               lt   Html Image lt CapchaController gt  c   gt  c Index    120  30   Current time    gt

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You can write directly to the response but then it isn t testable   It is preferred to return an ActionResult that has deferred execution   Here is my resusable StreamResult   public class StreamResult   ViewResult       public Stream Stream   get  set        public string ContentType   get  set        public string ETag   get  set         public override void ExecuteResult ControllerContext context                context HttpContext Response ContentType   ContentType          if  ETag    null  context HttpContext Response AddHeader  ETag   ETag           const int size   4096          byte   bytes   new byte size           int numBytes          while   numBytes   Stream Read bytes  0  size    gt  0              context HttpContext Response OutputStream Write bytes  0  numBytes

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You could use the HttpContext Response and directly write the content to it  WriteFile   might work for you  and then return ContentResult from your action instead of ActionResult   Disclaimer  I have not tried this  it s based on looking at the available APIs   -

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UPDATE  There are better options than my original answer   This works outside of MVC quite well but it s better to stick with the built-in methods of returning image content  See up-voted answers   You certainly can   Try out these steps    Load the image from disk in to a byte array cache the image in the case you expect more requests for the image and don t want the disk I O  my sample doesn t cache it below  Change the mime type via the Response ContentType Response BinaryWrite out the image byte array   Here s some sample code   string pathToFile     C  Documents and Settings some path jpg   byte   imageData   File ReadAllBytes pathToFile   Response ContentType    image jpg   Response BinaryWrite imageData     Hope that helps

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You can create your own extension and do this way   public static class ImageResultHelper       public static string Image lt T gt  this HtmlHelper helper  Expression lt Action lt T gt  gt  action  int width  int height              where T   Controller               return ImageResultHelper Image lt T gt  helper  action  width  height                  public static string Image lt T gt  this HtmlHelper helper  Expression lt Action lt T gt  gt  action  int width  int height  string alt              where T   Controller               var expression   action Body as MethodCallExpression          string actionMethodName   string Empty          if  expression    null                        actionMethodName   expression Method Name                    string url   new UrlHelper helper ViewContext RequestContext  helper RouteCollection  Action actionMethodName  typeof T  Name Remove typeof T  Name IndexOf  Controller     ToString                       string url   LinkBuilder BuildUrlFromExpression lt T gt  helper ViewContext RequestContext  helper RouteCollection  action           return string Format   lt img src    0    width    1    height    2    alt    3      gt    url  width  height  alt            public class ImageResult   ActionResult       public ImageResult            public Image Image   get  set        public ImageFormat ImageFormat   get  set         public override void ExecuteResult ControllerContext context                   verify properties          if  Image    null                        throw new ArgumentNullException  Image                      if  ImageFormat    null                        throw new ArgumentNullException  ImageFormat                          output          context HttpContext Response Clear            context HttpContext Response ContentType   GetMimeType ImageFormat           Image Save context HttpContext Response OutputStream  ImageFormat              private static string GetMimeType ImageFormat imageFormat                ImageCodecInfo   codecs   ImageCodecInfo GetImageEncoders            return codecs First codec   gt  codec FormatID    imageFormat Guid  MimeType          public ActionResult Index           return new ImageResult   Image   image  ImageFormat   ImageFormat Jpeg               lt   Html Image lt CapchaController gt  c   gt  c Index    120  30   Current time    gt

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You could use the HttpContext Response and directly write the content to it  WriteFile   might work for you  and then return ContentResult from your action instead of ActionResult   Disclaimer  I have not tried this  it s based on looking at the available APIs   -

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Using the release version of MVC  here is what I do    AcceptVerbs HttpVerbs Get    OutputCache CacheProfile    CustomerImages    public FileResult Show int customerId  string imageName        var path   string Concat ConfigData ImagesDirectory  customerId        imageName       return new FileStreamResult new FileStream path  FileMode Open    image jpeg        I obviously have some application specific stuff in here regarding the path construction  but the returning of the FileStreamResult is nice and simple   I did some performance testing in regards to this action against your everyday call to the image  bypassing the controller  and the difference between the averages was only about 3 milliseconds  controller avg was 68ms  non-controller was 65ms      I had tried some of the other methods mentioned in answers here and the performance hit was much more dramatic    several of the solutions responses were as much as 6x the non-controller  other controllers avg 340ms  non-controller 65ms

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you can use File to return a file like View  Content etc       public ActionResult PrintDocInfo string Attachment                                string test   Attachment                  if  test    string Empty    test          test    null                                        string filename   Attachment Split       Last                        string filepath   Attachment                      byte   filedata   System IO File ReadAllBytes Attachment                       string contentType   MimeMapping GetMimeMapping Attachment                        System Net Mime ContentDisposition cd   new System Net Mime ContentDisposition                                               FileName   filename                          Inline   true                                              Response AppendHeader  Content-Disposition   cd ToString                          return File filedata  contentType                                               else   return Content   lt h3 gt  Patient Clinical Document Not Uploaded lt  h3 gt

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Using the release version of MVC  here is what I do    AcceptVerbs HttpVerbs Get    OutputCache CacheProfile    CustomerImages    public FileResult Show int customerId  string imageName        var path   string Concat ConfigData ImagesDirectory  customerId        imageName       return new FileStreamResult new FileStream path  FileMode Open    image jpeg        I obviously have some application specific stuff in here regarding the path construction  but the returning of the FileStreamResult is nice and simple   I did some performance testing in regards to this action against your everyday call to the image  bypassing the controller  and the difference between the averages was only about 3 milliseconds  controller avg was 68ms  non-controller was 65ms      I had tried some of the other methods mentioned in answers here and the performance hit was much more dramatic    several of the solutions responses were as much as 6x the non-controller  other controllers avg 340ms  non-controller 65ms

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To expland on Dyland s response slightly   Three classes implement the FileResult class    System Web Mvc FileResult       System Web Mvc FileContentResult       System Web Mvc FilePathResult       System Web Mvc FileStreamResult   They re all fairly self explanatory    For file path downloads where the file exists on disk  use FilePathResult - this is the easiest way and avoids you having to use Streams  For byte   arrays  akin to Response BinaryWrite   use FileContentResult  For byte   arrays where you want the file to download  content-disposition  attachment   use FileStreamResult in a similar way to below  but with a MemoryStream and using GetBuffer    For Streams use FileStreamResult  It s called a FileStreamResult but it takes a Stream so I d guess it works with a MemoryStream    Below is an example of using the content-disposition technique  not tested         AcceptVerbs HttpVerbs Post       public ActionResult GetFile                    No need to dispose the stream  MVC does it for you         string path   Path Combine AppDomain CurrentDomain BaseDirectory   App Data    myimage png            FileStream stream   new FileStream path  FileMode Open           FileStreamResult result   new FileStreamResult stream   image png            result FileDownloadName    image png           return result

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This worked for me  Since I m storing images on a SQL Server database        HttpGet   image  uuid         public IActionResult GetImageFile string uuid            ActionResult actionResult   new NotFoundResult            var fileImage    db ImageFiles Find uuid           if  fileImage    null                actionResult   new FileContentResult fileImage Data                  fileImage ContentType                     return actionResult          In the snippet above  db ImageFiles Find uuid  is searching for the image file record in the db  EF context   It returns a FileImage object which is just a custom class I made for the model and then uses it as FileContentResult   public class FileImage      public string Uuid   get  set       public byte   Data   get  set       public string ContentType   get  set

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I see two options   1  Implement your own IViewEngine and set the ViewEngine property of the Controller you are using to your ImageViewEngine in your desired  image  method   2  Use a view  -   Just change the content type etc

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if   System IO File Exists filePath       return SomeHelper EmptyImageResult       preventing JSON GET POST exception else     return new FilePathResult filePath  contentType     SomeHelper EmptyImageResult   should return FileResult with existing image  1x1 transparent  for example    This is easiest way if you have files stored on local drive  If files are byte   or stream - then use FileContentResult or FileStreamResult as Dylan suggested

User · Answer

UPDATE  There are better options than my original answer   This works outside of MVC quite well but it s better to stick with the built-in methods of returning image content  See up-voted answers   You certainly can   Try out these steps    Load the image from disk in to a byte array cache the image in the case you expect more requests for the image and don t want the disk I O  my sample doesn t cache it below  Change the mime type via the Response ContentType Response BinaryWrite out the image byte array   Here s some sample code   string pathToFile     C  Documents and Settings some path jpg   byte   imageData   File ReadAllBytes pathToFile   Response ContentType    image jpg   Response BinaryWrite imageData     Hope that helps

User · Answer

I see two options   1  Implement your own IViewEngine and set the ViewEngine property of the Controller you are using to your ImageViewEngine in your desired  image  method   2  Use a view  -   Just change the content type etc

User · Answer

UPDATE  There are better options than my original answer   This works outside of MVC quite well but it s better to stick with the built-in methods of returning image content  See up-voted answers   You certainly can   Try out these steps    Load the image from disk in to a byte array cache the image in the case you expect more requests for the image and don t want the disk I O  my sample doesn t cache it below  Change the mime type via the Response ContentType Response BinaryWrite out the image byte array   Here s some sample code   string pathToFile     C  Documents and Settings some path jpg   byte   imageData   File ReadAllBytes pathToFile   Response ContentType    image jpg   Response BinaryWrite imageData     Hope that helps

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Read the image  convert it to byte    then return a File   with a content type    public ActionResult ImageResult Image image  ImageFormat format  string contentType      using  var stream   new MemoryStream                image Save stream  format         return File stream ToArray    contentType                 Here are the usings   using System Drawing  using System Drawing Imaging  using System IO  using Microsoft AspNetCore Mvc

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Yes you can return Image public ActionResult GetImage string imageFileName        var path   Path Combine Server MapPath  quot  Images quot    imageFileName    quot  jpg quot         return base File path   quot image jpeg quot        Please don t forget to mark this as answer

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Use the base controllers File method   public ActionResult Image string id        var dir   Server MapPath   Images        var path   Path Combine dir  id     jpg      validate the path for security or use other means to generate the path      return base File path   image jpeg        As a note  this seems to be fairly efficient  I did a test where I requested the image through the controller  http   localhost MyController Image MyImage  and through the direct URL  http   localhost Images MyImage jpg  and the results were    MVC  7 6 milliseconds per photo Direct  6 7 milliseconds per photo   Note  this is the average time of a request  The average was calculated by making thousands of requests on the local machine  so the totals should not include network latency or bandwidth issues

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Look at ContentResult  This returns a string  but can be used to make your own BinaryResult-like class

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I also encountered similar requirement   So in my case I make a request to Controller with the image folder path  which in return sends back a ImageResult object   Following code snippet illustrate the work   var src   string Format   GenericGrid mvc DocumentPreviewImageLink fullpath  0  amp routingId  1  amp siteCode  2    fullFilePath  metaInfo RoutingId  da SiteCode                    if  enlarged                      result     lt a class  thumbnail  href   thumb  gt                               lt img src      src      height  66px  border  0    gt                               lt span gt  lt img src      src        gt  lt  span gt                               lt  a gt                    else                     result     lt span gt  lt img src      src      height  150px  border  0    gt  lt  span gt      And in the Controller from the the image path I produce the image and return it back to the caller  try     var file   new FileInfo fullpath     if   file Exists       return string Empty      var image   new WebImage fullpath     return new ImageResult new MemoryStream image GetBytes      image jpg        catch Exception ex      return  File Error     ex ToString

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I see two options   1  Implement your own IViewEngine and set the ViewEngine property of the Controller you are using to your ImageViewEngine in your desired  image  method   2  Use a view  -   Just change the content type etc

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Below code utilizes System Drawing Bitmap to load the image  using System Drawing  using System Drawing Imaging   public IActionResult Get         string filename    quot Image test jpg quot       var bitmap   new Bitmap filename        var ms   new System IO MemoryStream        bitmap Save ms  ImageFormat Jpeg       ms Position   0      return new FileStreamResult ms   quot image jpeg quot

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You can write directly to the response but then it isn t testable   It is preferred to return an ActionResult that has deferred execution   Here is my resusable StreamResult   public class StreamResult   ViewResult       public Stream Stream   get  set        public string ContentType   get  set        public string ETag   get  set         public override void ExecuteResult ControllerContext context                context HttpContext Response ContentType   ContentType          if  ETag    null  context HttpContext Response AddHeader  ETag   ETag           const int size   4096          byte   bytes   new byte size           int numBytes          while   numBytes   Stream Read bytes  0  size    gt  0              context HttpContext Response OutputStream Write bytes  0  numBytes

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I also encountered similar requirement   So in my case I make a request to Controller with the image folder path  which in return sends back a ImageResult object   Following code snippet illustrate the work   var src   string Format   GenericGrid mvc DocumentPreviewImageLink fullpath  0  amp routingId  1  amp siteCode  2    fullFilePath  metaInfo RoutingId  da SiteCode                    if  enlarged                      result     lt a class  thumbnail  href   thumb  gt                               lt img src      src      height  66px  border  0    gt                               lt span gt  lt img src      src        gt  lt  span gt                               lt  a gt                    else                     result     lt span gt  lt img src      src      height  150px  border  0    gt  lt  span gt      And in the Controller from the the image path I produce the image and return it back to the caller  try     var file   new FileInfo fullpath     if   file Exists       return string Empty      var image   new WebImage fullpath     return new ImageResult new MemoryStream image GetBytes      image jpg        catch Exception ex      return  File Error     ex ToString

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This might be helpful if you d like to modify the image before returning it   public ActionResult GetModifiedImage         Image image   Image FromFile Path Combine Server MapPath   Content images     image png          using  Graphics g   Graphics FromImage image                    do something with the Graphics  eg  write  Hello World            string text    Hello World                Create font and brush          Font drawFont   new Font  Arial   10           SolidBrush drawBrush   new SolidBrush Color Black               Create point for upper-left corner of drawing          PointF stringPoint   new PointF 0  0            g DrawString text  drawFont  drawBrush  stringPoint              MemoryStream ms   new MemoryStream         image Save ms  System Drawing Imaging ImageFormat Png        return File ms ToArray     image png

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Solution 1  To render an image in a view from an image URL  You can create your own extension method   public static MvcHtmlString Image this HtmlHelper helper string imageUrl       string tag     lt img src   0    gt       tag   string Format tag imageUrl      return MvcHtmlString Create tag       Then use it like    Html Image  Model ImagePath     Solution 2  To render image from database  Create a controller method that returns image data like below  public sealed class ImageController   Controller     public ActionResult View string id          var image    images LoadImage id     Pull image from the database      if  image    null         return HttpNotFound        return File image Data  image Mime           And use it in a view like       Html RenderAction  View   Image  new  id  Model ImageId      To use an image rendered from this actionresult in any HTML  use   lt img src  http   something com image view id  imageid  gt

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You can write directly to the response but then it isn t testable   It is preferred to return an ActionResult that has deferred execution   Here is my resusable StreamResult   public class StreamResult   ViewResult       public Stream Stream   get  set        public string ContentType   get  set        public string ETag   get  set         public override void ExecuteResult ControllerContext context                context HttpContext Response ContentType   ContentType          if  ETag    null  context HttpContext Response AddHeader  ETag   ETag           const int size   4096          byte   bytes   new byte size           int numBytes          while   numBytes   Stream Read bytes  0  size    gt  0              context HttpContext Response OutputStream Write bytes  0  numBytes

User · Answer

Look at ContentResult  This returns a string  but can be used to make your own BinaryResult-like class

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To expland on Dyland s response slightly   Three classes implement the FileResult class    System Web Mvc FileResult       System Web Mvc FileContentResult       System Web Mvc FilePathResult       System Web Mvc FileStreamResult   They re all fairly self explanatory    For file path downloads where the file exists on disk  use FilePathResult - this is the easiest way and avoids you having to use Streams  For byte   arrays  akin to Response BinaryWrite   use FileContentResult  For byte   arrays where you want the file to download  content-disposition  attachment   use FileStreamResult in a similar way to below  but with a MemoryStream and using GetBuffer    For Streams use FileStreamResult  It s called a FileStreamResult but it takes a Stream so I d guess it works with a MemoryStream    Below is an example of using the content-disposition technique  not tested         AcceptVerbs HttpVerbs Post       public ActionResult GetFile                    No need to dispose the stream  MVC does it for you         string path   Path Combine AppDomain CurrentDomain BaseDirectory   App Data    myimage png            FileStream stream   new FileStream path  FileMode Open           FileStreamResult result   new FileStreamResult stream   image png            result FileDownloadName    image png           return result

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Read the image  convert it to byte    then return a File   with a content type    public ActionResult ImageResult Image image  ImageFormat format  string contentType      using  var stream   new MemoryStream                image Save stream  format         return File stream ToArray    contentType                 Here are the usings   using System Drawing  using System Drawing Imaging  using System IO  using Microsoft AspNetCore Mvc

[asp.net] Can an ASP.NET MVC controller return an Image?

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