Example usage for org.apache.wicket.util.resource IResourceStream getContentType

Introduction

In this page you can find the example usage for org.apache.wicket.util.resource IResourceStream getContentType.

Prototype

String getContentType();

Source Link

Document

Gets the mime type of this resource

Usage

From source file:org.cast.cwm.ResourceDirectory.java

License:Open Source License

/**
 * creates a new resource response based on the request attributes
 * /*w  w w. jav a 2 s . co  m*/
 * @param attributes
 *            current request attributes from client
 * @return resource response for answering request
 */
@Override
protected ResourceResponse newResourceResponse(Attributes attributes) {
    String relativePath = "";
    PageParameters parameters = attributes.getParameters();
    for (int i = 0; i < parameters.getIndexedCount(); i++) {
        relativePath += parameters.get(i);
        relativePath += '/';
    }
    if (relativePath.endsWith("/"))
        relativePath = relativePath.substring(0, relativePath.length() - 1);
    log.trace("relativePath is {}", relativePath);

    String absolutePath = new File(sourceDirectory, relativePath).getAbsolutePath();

    final ResourceResponse resourceResponse = new ResourceResponse();

    final IResourceStream resourceStream = getResourceStream(absolutePath);

    // bail out if resource stream could not be found
    if (resourceStream == null) {
        return sendResourceError(absolutePath, resourceResponse, HttpServletResponse.SC_NOT_FOUND,
                "Unable to find resource");
    }

    // allow caching
    resourceResponse.setCacheScope(WebResponse.CacheScope.PUBLIC);
    resourceResponse.setCacheDuration(cacheDuration);

    // add Last-Modified header (to support HEAD requests and If-Modified-Since)
    resourceResponse.setLastModified(resourceStream.lastModifiedTime());

    if (resourceResponse.dataNeedsToBeWritten(attributes)) {
        String contentType = resourceStream.getContentType();

        if (contentType == null && Application.exists())
            contentType = Application.get().getMimeType(absolutePath);

        // set Content-Type (may be null)
        resourceResponse.setContentType(contentType);

        try {
            // read resource data
            final byte[] bytes;

            bytes = IOUtils.toByteArray(resourceStream.getInputStream());

            // send Content-Length header
            resourceResponse.setContentLength(bytes.length);

            // send response body with resource data
            resourceResponse.setWriteCallback(new WriteCallback() {
                @Override
                public void writeData(Attributes attributes) {
                    attributes.getResponse().write(bytes);
                }
            });
        } catch (IOException e) {
            log.debug(e.getMessage(), e);
            return sendResourceError(absolutePath, resourceResponse, 500, "Unable to read resource stream");
        } catch (ResourceStreamNotFoundException e) {
            log.debug(e.getMessage(), e);
            return sendResourceError(absolutePath, resourceResponse, 500, "Unable to open resource stream");
        } finally {
            try {
                resourceStream.close();
            } catch (IOException e) {
                log.warn("Unable to close the resource stream", e);
            }
        }
    }

    return resourceResponse;
}

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From source file:org.wicketstuff.html5.image.CanvasImage.java

License:Apache License

/**
 * Renders the complete image tag with the base64 encoded content.
 */// w  w  w  .j av  a 2  s  .c  o  m
@Override
protected void onComponentTag(ComponentTag tag) {
    checkComponentTag(tag, "img");
    super.onComponentTag(tag);

    IResourceStream packageResourceStream = packageResourceReference.getResource().getResourceStream();
    if (packageResourceStream != null) {
        try {
            StringBuilder builder = new StringBuilder();
            builder.append("data:");
            builder.append(packageResourceStream.getContentType());
            builder.append(";base64,");
            byte[] bytes = new byte[(int) packageResourceStream.length().bytes()];
            DataInputStream dataInputStream = new DataInputStream(packageResourceStream.getInputStream());
            dataInputStream.readFully(bytes);
            builder.append(Base64.encodeBase64String(bytes));
            tag.put("src", builder.toString());
        } catch (Exception e) {
            throw new WicketRuntimeException("An error occured while reading the package resource stream", e);
        }
    } else {
        // If the package resource stream is not set create an empty image
        tag.put("src", "#");
        tag.put("style", "display:none;");
    }
}

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