@ -29,9 +29,7 @@ import java.awt.MediaTracker;
import java.awt.image.BufferedImage ;
import java.awt.image.Raster ;
import java.io.ByteArrayInputStream ;
import java.io.File ;
import java.io.IOException ;
import java.net.MalformedURLException ;
import java.util.Map ;
import net.yacy.cora.document.id.DigestURL ;
@ -45,7 +43,6 @@ import net.yacy.cora.storage.ConcurrentARC;
import net.yacy.cora.util.ConcurrentLog ;
import net.yacy.data.URLLicense ;
import net.yacy.document.ImageParser ;
import net.yacy.kelondro.util.FileUtils ;
import net.yacy.kelondro.util.MemoryControl ;
import net.yacy.kelondro.workflow.WorkflowProcessor ;
import net.yacy.peers.graphics.EncodedImage ;
@ -58,17 +55,30 @@ public class ViewImage {
private static Map < String , Image > iconcache = new ConcurrentARC < String , Image > ( 1000 ,
Math . max ( 10 , Math . min ( 32 , WorkflowProcessor . availableCPU * 2 ) ) ) ;
private static String defaulticon = "htroot/env/grafics/dfltfvcn.ico" ;
private static byte [ ] defaulticonb ;
static {
try {
defaulticonb = FileUtils . read ( new File ( defaulticon ) ) ;
} catch ( final IOException e ) {
}
}
public static Object respond ( final RequestHeader header , final serverObjects post , final serverSwitch env ) {
/ * *
* Try parsing image from post "url" parameter or from "code" parameter .
* When image format is not supported , return directly image data . When
* image could be parsed , try encoding to target format specified by header
* "EXT" .
*
* @param header
* request header
* @param post
* post parameters
* @param env
* environment
* @return an { @link EncodedImage } instance encoded in format specified in
* post , or an InputStream pointing to original image data
* @throws IOException
* when specified url is malformed , or a read / write error
* occured , or input or target image format is not supported .
* Sould end in a HTTP 500 error whose processing is more
* consistent across browsers than a response with zero
* content bytes .
* /
public static Object respond ( final RequestHeader header , final serverObjects post , final serverSwitch env )
throws IOException {
final Switchboard sb = ( Switchboard ) env ;
@ -85,25 +95,13 @@ public class ViewImage {
| | sb . verifyAuthentication ( header ) ; // handle access rights
DigestURL url = null ;
if ( ( urlString . length ( ) > 0 ) & & ( auth ) )
try {
url = new DigestURL ( urlString ) ;
} catch ( final MalformedURLException e1 ) {
url = null ;
}
if ( ( urlString . length ( ) > 0 ) & & ( auth ) ) {
url = new DigestURL ( urlString ) ;
}
if ( ( url = = null ) & & ( urlLicense . length ( ) > 0 ) ) {
urlString = URLLicense . releaseLicense ( urlLicense ) ;
try {
url = new DigestURL ( urlString ) ;
} catch ( final MalformedURLException e1 ) {
url = null ;
urlString = null ;
}
}
if ( urlString = = null ) {
return null ;
url = new DigestURL ( urlString ) ;
}
// get the image as stream
@ -125,28 +123,15 @@ public class ViewImage {
BlacklistType . SEARCH , agent ) ;
} catch ( final IOException e ) {
ConcurrentLog . fine ( "ViewImage" , "cannot load: " + e . getMessage ( ) ) ;
throw e ;
}
boolean okToCache = true ;
if ( resourceb = = null ) {
if ( urlString . endsWith ( ".ico" ) ) {
// load default favicon dfltfvcn.ico
// Should not do this here : we can be displaying search
// image result of '.ico' type and do not want to display a
// default
if ( defaulticonb = = null )
try {
resourceb = FileUtils . read ( new File ( sb . getAppPath ( ) , defaulticon ) ) ;
okToCache = false ;
} catch ( final IOException e ) {
return null ;
}
else {
resourceb = defaulticonb ;
okToCache = false ;
}
} else {
return null ;
}
/ *
* Throw an exception , wich will end in a HTTP 500 response ,
* better handled by browsers than an empty image
* /
throw new IOException ( "Image could not be loaded." ) ;
}
String urlExt = MultiProtocolURL . getFileExtension ( url . getFileName ( ) ) ;
@ -160,7 +145,7 @@ public class ViewImage {
return encodedImage ;
}
/ * *
* @param formatName
* informal file format name . For example : "png" .
@ -180,8 +165,8 @@ public class ViewImage {
}
/ * *
* Process resourceb byte array to try to produce an instance
* eventually scaled and cropped depending on post parameters
* Process resourceb byte array to try to produce an Encoded Image instance
* eventually scaled and cropped depending on post parameters .
*
* @param post
* request post parameters . Must not be null .
@ -195,13 +180,22 @@ public class ViewImage {
* true when image can be cached
* @param resourceb
* byte array . Must not be null .
* @return an Image instance when parsing is OK , or null .
* @return an EncodedImage instance .
* @throws IOException
* when image could not be parsed or encoded to specified format
* /
protected static EncodedImage parseAndScale ( serverObjects post , boolean auth , String urlString , String ext ,
boolean okToCache , byte [ ] resourceb ) {
boolean okToCache , byte [ ] resourceb ) throws IOException {
EncodedImage encodedImage = null ;
Image image = ImageParser . parse ( urlString , resourceb ) ;
if ( image = = null ) {
/ *
* Throw an exception , wich will end in a HTTP 500 response , better
* handled by browsers than an empty image
* /
throw new IOException ( "Image format is not supported." ) ;
}
if ( image ! = null ) {
int maxwidth = post . getInt ( "maxwidth" , 0 ) ;
@ -242,15 +236,17 @@ public class ViewImage {
iconcache . put ( urlString , image ) ;
}
}
/* An error can still occur when transcoding from buffered image to target ext : in that case return null */
/ *
* An error can still occur when transcoding from buffered image to
* target ext : in that case return null
* /
encodedImage = new EncodedImage ( image , ext , isStatic ) ;
if ( encodedImage . getImage ( ) . length ( ) = = 0 ) {
encodedImage = null ;
if ( encodedImage . getImage ( ) . length ( ) = = 0 ) {
throw new IOException ( "Image could not be encoded to format : " + ext ) ;
}
}
return encodedImage ;
}
/ * *
* Calculate image dimensions from image original dimensions , max
@ -348,7 +344,7 @@ public class ViewImage {
}
return image ;
}
/ * *
* Crop image to make a square
*
luc
9 years ago