jakarta-taglibs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From a...@apache.org
Subject cvs commit: jakarta-taglibs-sandbox/image/src/org/apache/taglibs/image ImageTag.java
Date Wed, 21 Apr 2004 13:41:23 GMT
abey        2004/04/21 06:41:23

  Modified:    image/src/org/apache/taglibs/image ImageTag.java
  Log:
  Added encoding img src urls - Abey
  
  Revision  Changes    Path
  1.4       +283 -259  jakarta-taglibs-sandbox/image/src/org/apache/taglibs/image/ImageTag.java
  
  Index: ImageTag.java
  ===================================================================
  RCS file: /home/cvs/jakarta-taglibs-sandbox/image/src/org/apache/taglibs/image/ImageTag.java,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- ImageTag.java	9 Oct 2003 15:20:02 -0000	1.3
  +++ ImageTag.java	21 Apr 2004 13:41:23 -0000	1.4
  @@ -52,7 +52,7 @@
    * <http://www.apache.org/>.
    *
    */
  - 
  +
   package org.apache.taglibs.image;
   
   import java.awt.image.BufferedImage;
  @@ -63,6 +63,7 @@
   
   import javax.servlet.ServletContext;
   import javax.servlet.http.HttpServletRequest;
  +import javax.servlet.http.HttpServletResponse;
   import javax.servlet.jsp.JspException;
   import javax.servlet.jsp.tagext.BodyTagSupport;
   import javax.servlet.jsp.tagext.Tag;
  @@ -72,269 +73,292 @@
   import com.mullassery.imaging.util.Util;
   
   /**
  - * Images will be processed and saved in a specified directory.
  - * The image tag is printed with the src pointing to the newly
  - * created image.
  - * The attribute to refresh will always generate the image. When it 
  - * is turned off, the image which was generated earlier is used. This
  - * will save a lot of processing and memory usage (especially for usage 
  - * such as thumbnails etc.).
  - * The display option allows one to specify an image to be displayed
  - * or just created but not displayed. 
  + * Images will be processed and saved in a specified directory. The image tag
  + * is printed with the src pointing to the newly created image. The attribute
  + * to refresh will always generate the image. When it is turned off, the image
  + * which was generated earlier is used. This will save a lot of processing and
  + * memory usage (especially for usage such as thumbnails etc.). The display
  + * option allows one to specify an image to be displayed or just created but
  + * not displayed.
    * 
  - * For truly dynamic images that are made for a particular person
  - * only and that is not required after that one use can turn on a 
  - * &quot;dynamic&quot; option/ attribute that will point it to a servlet   
  - * that will supply the image and delete it then.
  + * For truly dynamic images that are made for a particular person only and that
  + * is not required after that one use can turn on a &quot;dynamic&quot; option/
  + * attribute that will point it to a servlet that will supply the image and
  + * delete it then.
    * 
    * @author Abey Mullassery
  - * 
  + *  
    */
  -public class ImageTag extends BodyTagSupport implements ImageHolder{
  +public class ImageTag extends BodyTagSupport implements ImageHolder {
  +
  +    public static final String GEN_IMAGES_DIR = "gen-images";
  +
  +    private String src;
   
  -	public static final String GEN_IMAGES_DIR = "gen-images";
  +    private String attributes;
   
  -	private String src;
  -	private String attributes;
  -	private String name;
  -	private boolean deleteOnExit = false;
  -	private boolean refresh = false;
  -	private boolean display = true;
  -	private String dir = GEN_IMAGES_DIR;
  -
  -	private BufferedImage image;
  -	private File img;
  -	private Imaging imaging;
  -	private ServletContext context;
  -	private HttpServletRequest hr; //should this be ServletRequest?
  -	private String baseUrl;
  -	private String imagingType;
  -	private ImageHolder par;
  -
  -	public int doStartTag() throws JspException {
  -		context = pageContext.getServletContext();
  -		hr = (HttpServletRequest) (pageContext.getRequest());
  -		String reqUrl = hr.getRequestURL().toString();
  -		baseUrl = reqUrl.substring(0, reqUrl.indexOf(hr.getRequestURI()));
  -	
  -		if (refresh && src == null) {
  -			throw new JspException("Image \"src\" should be specified to refresh forcefully");
  -		}
  -		//serving as a nested Tag to the Overlay tag?
  -		Tag pTag = getParent();
  -		if (pTag != null && (pTag instanceof ImageHolder)) {
  -			par = (ImageHolder)getParent();
  -			if (src == null && name == null) { //taking an existing image
  -				throw new JspException("Image \"src\" or \"name\" should be specified");
  -			}
  -		} else {
  -			if (src == null) {
  -				throw new JspException("Image \"src\" should be specified");
  -			}
  -		}
  -
  -		//don't throw exceptions for image errors like the <img> tag 
  -		try {
  -			//if the name is not specified the src will be specified
  -			if (name == null) {
  -				URL url = getUrl(src);
  -				name = url.getFile().substring(url.getFile().lastIndexOf('/') + 1);
  -			}
  -			String imgFile = Util.extractFileName(name);
  -			img = new File(context.getRealPath("/") + dir, imgFile);
  -			
  -			createImaging();
  -			if (refresh || !img.exists()) {
  -				refresh = true;
  -				image = imaging.read(getUrl(src));
  -			} else {
  -				image = imaging.read(img);
  -			}
  -		} catch (Throwable e) {
  -			refresh = false; //keep quiet; no errors
  -		}
  -
  -		if (refresh)
  -			return EVAL_BODY_BUFFERED;
  -		else
  -			return SKIP_BODY;
  -	}
  -
  -	private void createImaging() throws JspException {
  -		//use init variables to select JAI, Java2D, SWT, etc.
  -		if (imagingType == null || imagingType.length() == 0) {
  -			imagingType = (String)pageContext.findAttribute("ImageTag.imagingType");
  -		}
  -		if (imagingType != null && imagingType.length() > 0) {
  -			if (imagingType.equalsIgnoreCase("JAI")) {
  -				imaging = ImagingFactory.createImagingInstance(ImagingFactory.JAI);
  -			} else if (imagingType.equalsIgnoreCase("JAVA2D")) {
  -				imaging = ImagingFactory.createImagingInstance(ImagingFactory.JAVA2D);
  -			} else {
  -				throw new IllegalArgumentException("Unknown Imaging type specified!");
  -			}	
  -		} else {
  -			imaging = ImagingFactory.createImagingInstance();
  -		}
  -		//TODO: use init variables to set delteOnExit and refresh to true or false
  -	}
  -
  -	public int doAfterBody() throws JspException {
  -		bodyContent.clearBody();
  -		return SKIP_BODY;
  -	}
  -
  -	public int doEndTag() throws JspException {
  -		if (image == null)
  -			return EVAL_PAGE;
  -
  -		//serving as a nested Tag to the Overlay tag?
  -		if (par != null) {
  -			//just pass the image; no need to write/save
  -			par.setImage(image);
  -			return EVAL_PAGE;
  -		}
  -
  -		if (refresh) {
  -			File f = img.getParentFile();
  -			if (!f.exists())
  -				f.mkdirs();
  -			if (deleteOnExit) {
  -				img.deleteOnExit();
  -				f.deleteOnExit();
  -			}
  -			saveImage();
  -		}
  -		//if the image need not be displayed
  -		if (!display) {
  -			this.image = null;
  -			return EVAL_PAGE;
  -		}
  -
  -		StringBuffer html = new StringBuffer("<img ");
  -		if (attributes != null && attributes.length() != 0) {
  -			html.append(attributes);
  -		} else {
  -			attributes = ""; //a work around for the following conditions.
  -		}
  -		//checking if the user has already specified the attributes.
  -		String al = attributes.toLowerCase();
  -		if (al.indexOf(" src") == -1) {
  -			html.append(" src=" + '"' + getUrl('/' + dir + '/' + img.getName()) + '"');
  -		}
  -		if (al.indexOf("width") == -1 && al.indexOf("height") == -1) {
  -			html.append(" width=\"" + image.getWidth() + "\" height=\"" + image.getHeight() + "\"");
  -		}
  -		html.append(" />");
  -		try {
  -			pageContext.getOut().println(html.toString());
  -		} catch (IOException e) {
  -			context.log("Error writing <img> tag-html " + html, e);
  -			throw new JspException(e);
  -		}
  -		this.image = null;
  -		return EVAL_PAGE;
  -	}
  -	
  -	public void release() {
  -		this.image = null;
  -		super.release();
  -		System.gc();
  -	}
  -
  -	public void saveImage() {
  -		String type = Util.getExtentionType(img);
  -		if (type.equalsIgnoreCase("gif")) { //till GIF is supported
  -			type = "JPEG";
  -			String imgName = img.getAbsolutePath();
  -			int ind_dot = imgName.indexOf('.');
  -			imgName = imgName.substring(0, ind_dot + 1) + "jpg";
  -		}
  -		try {
  -			com.mullassery.imaging.util.Util.saveImage(imaging, image, type, img);
  -		} catch (IOException e) {
  -			new JspException(e);
  -		}
  -	}
  -
  -	public URL getUrl(String srcStr) throws JspException {
  -		if (srcStr.startsWith("./")) //will just act like one without it
  -			srcStr = srcStr.substring(2);
  -		String contextUrl = baseUrl + hr.getContextPath();
  -		
  -		if (!srcStr.startsWith(hr.getScheme())) {
  -			if (srcStr.startsWith("/")) {
  -				if (srcStr.startsWith(hr.getContextPath() + '/'))
  -					srcStr = baseUrl + srcStr;
  -				else
  -					srcStr = contextUrl + srcStr;
  -			} else {
  -				String parUrl = hr.getRequestURL().toString(); // can be /xyz?a=b
  -				// if like "/some/path.html" trim till "/" 
  -				if (parUrl.indexOf(".") != -1) {
  -					parUrl = parUrl.substring(0, parUrl.lastIndexOf("/"));
  -				}
  -
  -				// for every "../" trim till last "/" - till context path is reached
  -				while (srcStr.startsWith("../")) { // require parent directory?
  -					srcStr = srcStr.substring(3); // remove the "../" anyway
  -					if (parUrl.indexOf('/', contextUrl.length() - 1) != -1)
  -						parUrl = parUrl.substring(0, parUrl.lastIndexOf('/'));
  -				}				
  -				srcStr = parUrl + '/' + srcStr;
  -			}
  -		}
  -		URL url = null;
  -		try {
  -			url = new URL(srcStr);
  -		} catch (MalformedURLException e) {
  -			context.log("Not a proper URL: " + srcStr, e);
  -			throw new JspException(e);
  -		}
  -		return url;
  -	}
  -
  -	public void setName(String name) {
  -		this.name = name;
  -	}
  -
  -	public void setAttributes(String attributes) {
  -		this.attributes = attributes;
  -	}
  -
  -	public void setDir(String dir) {
  -		this.dir = dir;
  -	}
  -
  -	public void setSrc(String src) {
  -		this.src = src;
  -	}
  -
  -	public Imaging getImaging() {
  -		return this.imaging;
  -	}
  -
  -	public BufferedImage getImage() {
  -		return this.image;
  -	}
  -
  -	public void setImage(BufferedImage image) {
  -		this.image = image;
  -	}
  -
  -	public void setRefresh(boolean refresh) {
  -		this.refresh = refresh;
  -	}
  -
  -	public String getDir() {
  -		return this.dir;
  -	}
  -	public void setDisplay(boolean display) {
  -		this.display = display;
  -	}
  -
  -	public void setImagingType(String imagingType) {
  -		this.imagingType = imagingType;
  -	}
  +    private String name;
  +
  +    private boolean deleteOnExit = false;
  +
  +    private boolean refresh = false;
  +
  +    private boolean display = true;
  +
  +    private String dir = GEN_IMAGES_DIR;
  +
  +    private BufferedImage image;
  +
  +    private File img;
  +
  +    private Imaging imaging;
  +
  +    private ServletContext context;
  +
  +    private HttpServletRequest hr; //should this be ServletRequest?
  +
  +    private String baseUrl;
  +
  +    private String imagingType;
  +
  +    private ImageHolder par;
  +
  +    public int doStartTag() throws JspException {
  +        context = pageContext.getServletContext();
  +        hr = (HttpServletRequest) (pageContext.getRequest());
  +        String reqUrl = hr.getRequestURL().toString();
  +        baseUrl = reqUrl.substring(0, reqUrl.indexOf(hr.getRequestURI()));
  +
  +        if (refresh && src == null) { throw new JspException(
  +                "Image \"src\" should be specified to refresh forcefully"); }
  +        //serving as a nested Tag to the Overlay tag?
  +        Tag pTag = getParent();
  +        if (pTag != null && (pTag instanceof ImageHolder)) {
  +            par = (ImageHolder) getParent();
  +            if (src == null && name == null) { //taking an existing image
  +            throw new JspException(
  +                    "Image \"src\" or \"name\" should be specified"); }
  +        } else {
  +            if (src == null) { throw new JspException(
  +                    "Image \"src\" should be specified"); }
  +        }
  +
  +        //don't throw exceptions for image errors like the <img> tag
  +        try {
  +            //if the name is not specified the src will be specified
  +            if (name == null) {
  +                URL url = getUrl(src);
  +                name = url.getFile().substring(
  +                        url.getFile().lastIndexOf('/') + 1);
  +            }
  +            String imgFile = Util.extractFileName(name);
  +            img = new File(context.getRealPath("/") + dir, imgFile);
  +
  +            createImaging();
  +            if (refresh || !img.exists()) {
  +                refresh = true;
  +                image = imaging.read(getUrl(src));
  +            } else {
  +                image = imaging.read(img);
  +            }
  +        } catch (Throwable e) {
  +            refresh = false; //keep quiet; no errors
  +        }
  +
  +        if (refresh)
  +            return EVAL_BODY_BUFFERED;
  +        else
  +            return SKIP_BODY;
  +    }
  +
  +    private void createImaging() throws JspException {
  +        //use init variables to select JAI, Java2D, SWT, etc.
  +        if (imagingType == null || imagingType.length() == 0) {
  +            imagingType = (String) pageContext
  +                    .findAttribute("ImageTag.imagingType");
  +        }
  +        if (imagingType != null && imagingType.length() > 0) {
  +            if (imagingType.equalsIgnoreCase("JAI")) {
  +                imaging = ImagingFactory
  +                        .createImagingInstance(ImagingFactory.JAI);
  +            } else if (imagingType.equalsIgnoreCase("JAVA2D")) {
  +                imaging = ImagingFactory
  +                        .createImagingInstance(ImagingFactory.JAVA2D);
  +            } else {
  +                throw new IllegalArgumentException(
  +                        "Unknown Imaging type specified!");
  +            }
  +        } else {
  +            imaging = ImagingFactory.createImagingInstance();
  +        }
  +        //TODO: use init variables to set delteOnExit and refresh to true or
  +        // false
  +    }
  +
  +    public int doAfterBody() throws JspException {
  +        bodyContent.clearBody();
  +        return SKIP_BODY;
  +    }
  +
  +    public int doEndTag() throws JspException {
  +        if (image == null) return EVAL_PAGE;
  +
  +        //serving as a nested Tag to the Overlay tag?
  +        if (par != null) {
  +            //just pass the image; no need to write/save
  +            par.setImage(image);
  +            return EVAL_PAGE;
  +        }
  +
  +        if (refresh) {
  +            File f = img.getParentFile();
  +            if (!f.exists()) f.mkdirs();
  +            if (deleteOnExit) {
  +                img.deleteOnExit();
  +                f.deleteOnExit();
  +            }
  +            saveImage();
  +        }
  +        //if the image need not be displayed
  +        if (!display) {
  +            this.image = null;
  +            return EVAL_PAGE;
  +        }
  +
  +        StringBuffer html = new StringBuffer("<img ");
  +        if (attributes != null && attributes.length() != 0) {
  +            html.append(attributes);
  +        } else {
  +            attributes = ""; //a work around for the following conditions.
  +        }
  +        //checking if the user has already specified the attributes.
  +        String al = attributes.toLowerCase();
  +        if (al.indexOf(" src") == -1) {
  +            HttpServletResponse response = (HttpServletResponse) pageContext
  +                    .getResponse();
  +            String encodedUrl = response.encodeURL(getUrl(
  +                    '/' + dir + '/' + img.getName()).toString());
  +            html.append(" src=" + '"' + encodedUrl + '"');
  +        }
  +        if (al.indexOf("width") == -1 && al.indexOf("height") == -1) {
  +            html.append(" width=\"" + image.getWidth() + "\" height=\""
  +                    + image.getHeight() + "\"");
  +        }
  +        html.append(" />");
  +        try {
  +            pageContext.getOut().println(html.toString());
  +        } catch (IOException e) {
  +            context.log("Error writing <img> tag-html " + html, e);
  +            throw new JspException(e);
  +        }
  +        this.image = null;
  +        return EVAL_PAGE;
  +    }
  +
  +    public void release() {
  +        this.image = null;
  +        super.release();
  +        System.gc();
  +    }
  +
  +    public void saveImage() {
  +        String type = Util.getExtentionType(img);
  +        if (type.equalsIgnoreCase("gif")) { //till GIF is supported
  +            type = "JPEG";
  +            String imgName = img.getAbsolutePath();
  +            int ind_dot = imgName.indexOf('.');
  +            imgName = imgName.substring(0, ind_dot + 1) + "jpg";
  +        }
  +        try {
  +            com.mullassery.imaging.util.Util.saveImage(imaging, image, type,
  +                    img);
  +        } catch (IOException e) {
  +            new JspException(e);
  +        }
  +    }
  +
  +    public URL getUrl(String srcStr) throws JspException {
  +        if (srcStr.startsWith("./")) //will just act like one without it
  +                srcStr = srcStr.substring(2);
  +        String contextUrl = baseUrl + hr.getContextPath();
  +
  +        if (!srcStr.startsWith(hr.getScheme())) {
  +            if (srcStr.startsWith("/")) {
  +                if (srcStr.startsWith(hr.getContextPath() + '/'))
  +                    srcStr = baseUrl + srcStr;
  +                else
  +                    srcStr = contextUrl + srcStr;
  +            } else {
  +                String parUrl = hr.getRequestURL().toString(); // can be
  +                                                               // /xyz?a=b
  +                // if like "/some/path.html" trim till "/"
  +                if (parUrl.indexOf(".") != -1) {
  +                    parUrl = parUrl.substring(0, parUrl.lastIndexOf("/"));
  +                }
  +
  +                // for every "../" trim till last "/" - till context path is
  +                // reached
  +                while (srcStr.startsWith("../")) { // require parent directory?
  +                    srcStr = srcStr.substring(3); // remove the "../" anyway
  +                    if (parUrl.indexOf('/', contextUrl.length() - 1) != -1)
  +                            parUrl = parUrl.substring(0, parUrl
  +                                    .lastIndexOf('/'));
  +                }
  +                srcStr = parUrl + '/' + srcStr;
  +            }
  +        }
  +        URL url = null;
  +        try {
  +            url = new URL(srcStr);
  +        } catch (MalformedURLException e) {
  +            context.log("Not a proper URL: " + srcStr, e);
  +            throw new JspException(e);
  +        }
  +        return url;
  +    }
  +
  +    public void setName(String name) {
  +        this.name = name;
  +    }
  +
  +    public void setAttributes(String attributes) {
  +        this.attributes = attributes;
  +    }
  +
  +    public void setDir(String dir) {
  +        this.dir = dir;
  +    }
  +
  +    public void setSrc(String src) {
  +        this.src = src;
  +    }
  +
  +    public Imaging getImaging() {
  +        return this.imaging;
  +    }
  +
  +    public BufferedImage getImage() {
  +        return this.image;
  +    }
  +
  +    public void setImage(BufferedImage image) {
  +        this.image = image;
  +    }
  +
  +    public void setRefresh(boolean refresh) {
  +        this.refresh = refresh;
  +    }
  +
  +    public String getDir() {
  +        return this.dir;
  +    }
  +
  +    public void setDisplay(boolean display) {
  +        this.display = display;
  +    }
  +
  +    public void setImagingType(String imagingType) {
  +        this.imagingType = imagingType;
  +    }
   
   }
  
  
  

---------------------------------------------------------------------
To unsubscribe, e-mail: taglibs-dev-unsubscribe@jakarta.apache.org
For additional commands, e-mail: taglibs-dev-help@jakarta.apache.org


Mime
View raw message