Example usage for org.springframework.core.io.buffer DataBufferUtils read

Introduction

In this page you can find the example usage for org.springframework.core.io.buffer DataBufferUtils read.

Prototype

public static Flux<DataBuffer> read(Resource resource, DataBufferFactory bufferFactory, int bufferSize) 

Source Link

Document

Read the given Resource into a Flux of DataBuffer s.

Usage

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

@Override
public Mono<Resource> transform(ServerWebExchange exchange, Resource inputResource,
        ResourceTransformerChain chain) {

    return chain.transform(exchange, inputResource).flatMap(outputResource -> {
        String name = outputResource.getFilename();
        if (!this.fileExtension.equals(StringUtils.getFilenameExtension(name))) {
            return Mono.just(outputResource);
        }//from  www .  j a  v  a 2s .  c om
        DataBufferFactory bufferFactory = exchange.getResponse().bufferFactory();
        Flux<DataBuffer> flux = DataBufferUtils.read(outputResource, bufferFactory, StreamUtils.BUFFER_SIZE);
        return DataBufferUtils.join(flux).flatMap(dataBuffer -> {
            CharBuffer charBuffer = DEFAULT_CHARSET.decode(dataBuffer.asByteBuffer());
            DataBufferUtils.release(dataBuffer);
            String content = charBuffer.toString();
            return transform(content, outputResource, chain, exchange);
        });
    });
}

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

@Override
public Mono<Resource> transform(ServerWebExchange exchange, Resource inputResource,
        ResourceTransformerChain transformerChain) {

    return transformerChain.transform(exchange, inputResource).flatMap(ouptputResource -> {
        String filename = ouptputResource.getFilename();
        if (!"css".equals(StringUtils.getFilenameExtension(filename))
                || inputResource instanceof GzipResourceResolver.GzippedResource) {
            return Mono.just(ouptputResource);
        }//from w  ww .  ja  v a 2s .  c  o m

        if (logger.isTraceEnabled()) {
            logger.trace("Transforming resource: " + ouptputResource);
        }

        DataBufferFactory bufferFactory = exchange.getResponse().bufferFactory();
        Flux<DataBuffer> flux = DataBufferUtils.read(ouptputResource, bufferFactory, StreamUtils.BUFFER_SIZE);
        return DataBufferUtils.join(flux).flatMap(dataBuffer -> {
            CharBuffer charBuffer = DEFAULT_CHARSET.decode(dataBuffer.asByteBuffer());
            DataBufferUtils.release(dataBuffer);
            String cssContent = charBuffer.toString();
            return transformContent(cssContent, ouptputResource, transformerChain, exchange);
        });
    });
}

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