Example usage for org.springframework.web.reactive.resource TransformedResource TransformedResource

Introduction

In this page you can find the example usage for org.springframework.web.reactive.resource TransformedResource TransformedResource.

Prototype

public TransformedResource(Resource original, byte[] transformedContent) 

Source Link

Usage

From source file:org.springframework.web.reactive.resource.AppCacheManifestTransformer.java

private Mono<? extends Resource> transform(String content, Resource resource, ResourceTransformerChain chain,
        ServerWebExchange exchange) {//from  www.ja v  a  2  s.co m

    if (!content.startsWith(MANIFEST_HEADER)) {
        if (logger.isTraceEnabled()) {
            logger.trace("Manifest should start with 'CACHE MANIFEST', skip: " + resource);
        }
        return Mono.just(resource);
    }
    if (logger.isTraceEnabled()) {
        logger.trace("Transforming resource: " + resource);
    }
    return Flux.generate(new LineInfoGenerator(content))
            .concatMap(info -> processLine(info, exchange, resource, chain))
            .reduce(new ByteArrayOutputStream(), (out, line) -> {
                writeToByteArrayOutputStream(out, line + "\n");
                return out;
            }).map(out -> {
                String hash = DigestUtils.md5DigestAsHex(out.toByteArray());
                writeToByteArrayOutputStream(out, "\n" + "# Hash: " + hash);
                if (logger.isTraceEnabled()) {
                    logger.trace("AppCache file: [" + resource.getFilename() + "] hash: [" + hash + "]");
                }
                return new TransformedResource(resource, out.toByteArray());
            });
}

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From source file:org.springframework.web.reactive.resource.CssLinkResourceTransformer.java

private Mono<? extends Resource> transformContent(String cssContent, Resource resource,
        ResourceTransformerChain chain, ServerWebExchange exchange) {

    List<ContentChunkInfo> contentChunkInfos = parseContent(cssContent);
    if (contentChunkInfos.isEmpty()) {
        if (logger.isTraceEnabled()) {
            logger.trace("No links found.");
        }/* w w  w .ja  v a  2 s.  c  o m*/
        return Mono.just(resource);
    }

    return Flux.fromIterable(contentChunkInfos).concatMap(contentChunkInfo -> {
        String contentChunk = contentChunkInfo.getContent(cssContent);
        if (contentChunkInfo.isLink() && !hasScheme(contentChunk)) {
            String link = toAbsolutePath(contentChunk, exchange);
            return resolveUrlPath(link, exchange, resource, chain).defaultIfEmpty(contentChunk);
        } else {
            return Mono.just(contentChunk);
        }
    }).reduce(new StringWriter(), (writer, chunk) -> {
        writer.write(chunk);
        return writer;
    }).map(writer -> {
        byte[] newContent = writer.toString().getBytes(DEFAULT_CHARSET);
        return new TransformedResource(resource, newContent);
    });
}

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