284 lines
9.7 KiB
Java
284 lines
9.7 KiB
Java
package org.gcube.informationsystem.resourceregistry.api.rest.httputils;
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import java.io.BufferedReader;
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import java.io.DataOutputStream;
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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.io.StringWriter;
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import java.io.UnsupportedEncodingException;
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import java.net.HttpURLConnection;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLEncoder;
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import java.util.Map;
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import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
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import org.gcube.common.scope.api.ScopeProvider;
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import org.gcube.informationsystem.impl.utils.ISMapper;
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import org.gcube.informationsystem.model.ISManageable;
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import org.gcube.informationsystem.model.entity.Facet;
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import org.gcube.informationsystem.model.entity.Resource;
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import org.gcube.informationsystem.model.relation.Relation;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.AvailableInAnotherContextException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.NotFoundException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.ExceptionMapper;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.facet.FacetAvailableInAnotherContextException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.facet.FacetNotFoundException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.resource.ResourceAvailableInAnotherContextException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.resource.ResourceNotFoundException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.relation.RelationAvailableInAnotherContextException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.relation.RelationNotFoundException;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class HTTPCall {
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private static final Logger logger = LoggerFactory.getLogger(HTTPCall.class);
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public static final String APPLICATION_JSON_CHARSET_UTF_8 = "application/json;charset=UTF-8";
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public enum HTTPMETHOD {
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HEAD, GET, POST, PUT, DELETE;
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@Override
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public String toString() {
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return this.name();
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}
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}
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public static final String PATH_SEPARATOR = "/";
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public static final String PARAM_STARTER = "?";
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public static final String PARAM_EQUALS = "=";
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public static final String PARAM_SEPARATOR = "&";
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public static final String UTF8 = "UTF-8";
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protected final String address;
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protected final String userAgent;
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public HTTPCall(String address, String userAgent) {
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this.address = address;
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this.userAgent = userAgent;
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}
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protected String getParametersDataString(Map<String, ? extends Object> parameters)
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throws UnsupportedEncodingException {
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if (parameters == null) {
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return null;
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}
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StringBuilder result = new StringBuilder();
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boolean first = true;
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for (String key : parameters.keySet()) {
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if (first) {
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first = false;
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} else {
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result.append(PARAM_SEPARATOR);
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}
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result.append(URLEncoder.encode(key, UTF8));
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result.append(PARAM_EQUALS);
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result.append(URLEncoder.encode(String.valueOf(parameters.get(key)), UTF8));
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}
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return result.toString();
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}
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protected URL getURL(String address, String path, String urlParameters) throws MalformedURLException {
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StringWriter stringWriter = new StringWriter();
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stringWriter.append(address);
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if (address.endsWith(PATH_SEPARATOR)) {
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if (path.startsWith(PATH_SEPARATOR)) {
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path = path.substring(1);
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}
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} else {
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if (!path.startsWith(PATH_SEPARATOR)) {
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stringWriter.append(PARAM_SEPARATOR);
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}
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}
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stringWriter.append(path);
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if (urlParameters != null) {
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stringWriter.append(PARAM_STARTER);
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stringWriter.append(urlParameters);
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}
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return getURL(stringWriter.toString());
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}
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protected URL getURL(String urlString) throws MalformedURLException {
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URL url = new URL(urlString);
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if (url.getProtocol().compareTo("https") == 0) {
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url = new URL(url.getProtocol(), url.getHost(), url.getDefaultPort(), url.getFile());
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}
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return url;
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}
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protected HttpURLConnection getConnection(String path, String urlParameters, HTTPMETHOD method, String body)
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throws Exception {
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URL url = getURL(address, path, urlParameters);
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return getConnection(url, method, body);
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}
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protected HttpURLConnection getConnection(URL url, HTTPMETHOD method, String body) throws Exception {
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HttpURLConnection connection = (HttpURLConnection) url.openConnection();
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if (SecurityTokenProvider.instance.get() == null) {
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if (ScopeProvider.instance.get() == null) {
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throw new RuntimeException("Null Token and Scope. Please set your token first.");
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}
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connection.setRequestProperty("gcube-scope", ScopeProvider.instance.get());
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} else {
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connection.setRequestProperty(org.gcube.common.authorization.client.Constants.TOKEN_HEADER_ENTRY,
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SecurityTokenProvider.instance.get());
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}
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connection.setDoOutput(true);
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connection.setRequestProperty("Content-type", APPLICATION_JSON_CHARSET_UTF_8);
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connection.setRequestProperty("User-Agent", userAgent);
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connection.setRequestMethod(method.toString());
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if (body != null && (method == HTTPMETHOD.POST || method == HTTPMETHOD.PUT)) {
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DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
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wr.write(body.getBytes("UTF-8"));
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wr.flush();
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wr.close();
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}
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int responseCode = connection.getResponseCode();
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String responseMessage = connection.getResponseMessage();
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logger.trace("{} {} : {} - {}", method, connection.getURL(), responseCode, responseMessage);
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if (responseCode == HttpURLConnection.HTTP_MOVED_TEMP || responseCode == HttpURLConnection.HTTP_MOVED_PERM
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|| responseCode == HttpURLConnection.HTTP_SEE_OTHER) {
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URL redirectURL = getURL(connection.getHeaderField("Location"));
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logger.trace("{} is going to be redirect to {}", url.toString(), redirectURL.toString());
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connection = getConnection(redirectURL, method, body);
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}
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return connection;
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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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protected <C> NotFoundException getElementNotFoundException(Class<C> clz)
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throws NotFoundException, ResourceRegistryException {
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String error = String.format("Requested %s instance was not found", clz.getSimpleName());
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if (Resource.class.isAssignableFrom(clz)) {
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return new ResourceNotFoundException(error);
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} else if (Facet.class.isAssignableFrom(clz)) {
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return new FacetNotFoundException(error);
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} else if (Relation.class.isAssignableFrom(clz)) {
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return new RelationNotFoundException(error);
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}
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return new NotFoundException(error);
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}
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protected <C> AvailableInAnotherContextException getElementAvailableInAnotherContextException(Class<C> clz) {
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String error = String.format("Requested %s instance was not found", clz.getSimpleName());
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if (Resource.class.isAssignableFrom(clz)) {
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return new ResourceAvailableInAnotherContextException(error);
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} else if (Facet.class.isAssignableFrom(clz)) {
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return new FacetAvailableInAnotherContextException(error);
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} else if (Relation.class.isAssignableFrom(clz)) {
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return new RelationAvailableInAnotherContextException(error);
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}
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return new AvailableInAnotherContextException(error);
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}
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public <C> C call(Class<C> clz, String path, HTTPMETHOD method) throws Exception {
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return call(clz, path, method, null, null);
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}
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public <C> C call(Class<C> clz, String path, HTTPMETHOD method, Map<String, ? extends Object> parameters)
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throws Exception {
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return call(clz, path, method, parameters, null);
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}
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public <C> C call(Class<C> clz, String path, HTTPMETHOD method, String body) throws Exception {
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return call(clz, path, method, null, body);
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}
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@SuppressWarnings("unchecked")
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public <C> C call(Class<C> clz, String path, HTTPMETHOD method, Map<String, ? extends Object> parameters,
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String body) throws Exception {
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String urlParameters = getParametersDataString(parameters);
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HttpURLConnection connection = getConnection(path, urlParameters, method, body);
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try {
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int responseCode = connection.getResponseCode();
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String responseMessage = connection.getResponseMessage();
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logger.info("{} {} : {} - {}", method, connection.getURL(), responseCode, responseMessage);
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if (method == HTTPMETHOD.HEAD) {
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if (responseCode == HttpURLConnection.HTTP_NO_CONTENT) {
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return null;
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}
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if (responseCode == HttpURLConnection.HTTP_NOT_FOUND) {
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throw getElementNotFoundException(clz);
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}
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if (responseCode == HttpURLConnection.HTTP_FORBIDDEN) {
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throw getElementAvailableInAnotherContextException(clz);
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}
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}
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if (responseCode >= HttpURLConnection.HTTP_BAD_REQUEST) {
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InputStream inputStream = connection.getErrorStream();
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StringBuilder result = getStringBuilder(inputStream);
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String res = result.toString();
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ResourceRegistryException rre = null;
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try {
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rre = ExceptionMapper.unmarshal(ResourceRegistryException.class, res);
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} catch (Exception e) {
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rre = new ResourceRegistryException(responseMessage);
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}
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throw rre;
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}
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StringBuilder result = getStringBuilder(connection.getInputStream());
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String res = result.toString();
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logger.trace("Server returned content : {}", res);
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if (Boolean.class.isAssignableFrom(clz)) {
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return (C) ((Boolean) Boolean.valueOf(res));
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} else if (ISManageable.class.isAssignableFrom(clz)) {
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return (C) ISMapper.unmarshal((Class<ISManageable>) clz, res);
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}
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return (C) res;
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} finally {
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connection.disconnect();
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}
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}
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}
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