77 lines
2.4 KiB
Java
77 lines
2.4 KiB
Java
package org.gcube.gcat.utils;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.net.HttpURLConnection;
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import javax.ws.rs.InternalServerErrorException;
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import javax.ws.rs.WebApplicationException;
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import javax.ws.rs.core.HttpHeaders;
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import javax.ws.rs.core.MediaType;
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import org.gcube.common.gxhttp.request.GXHTTPStringRequest;
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import org.gcube.gcat.persistence.ckan.CKANInstance;
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import org.gcube.com.fasterxml.jackson.databind.ObjectMapper;
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import org.gcube.com.fasterxml.jackson.databind.node.ObjectNode;
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public class URIResolver {
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private static final String CATALOGUE_CONTEXT = "gcube_scope";
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private static final String ENTITY_TYPE = "entity_context";
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private static final String ENTITY_NAME = "entity_name";
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private static final String DATASET = "dataset";
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protected ObjectMapper mapper;
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public URIResolver() {
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this.mapper = new ObjectMapper();
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}
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protected StringBuilder getStringBuilder(InputStream inputStream) throws IOException {
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StringBuilder result = new StringBuilder();
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try(BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
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String line;
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while((line = reader.readLine()) != null) {
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result.append(line);
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}
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}
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return result;
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}
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public String getCatalogueItemURL(String name) {
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try {
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String uriResolverURL = CKANInstance.getInstance().getUriResolverURL();
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ObjectNode requestContent = mapper.createObjectNode();
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requestContent.put(CATALOGUE_CONTEXT, ContextUtility.getCurrentContext());
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requestContent.put(ENTITY_TYPE, DATASET);
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requestContent.put(ENTITY_NAME, name);
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GXHTTPStringRequest gxhttpStringRequest = GXHTTPStringRequest.newRequest(uriResolverURL);
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gxhttpStringRequest.from(Constants.CATALOGUE_NAME);
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gxhttpStringRequest.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON);
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gxhttpStringRequest.isExternalCall(true);
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String body = mapper.writeValueAsString(requestContent);
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HttpURLConnection httpURLConnection = gxhttpStringRequest.post(body);
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if(httpURLConnection.getResponseCode() != 200) {
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throw new InternalServerErrorException("Unable to get Item URL via URI Resolver");
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}
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String url = getStringBuilder(httpURLConnection.getInputStream()).toString();
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return url;
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} catch(WebApplicationException e) {
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throw e;
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} catch(Exception e) {
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throw new WebApplicationException(e);
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}
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}
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}
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