cadi/oauth-enduser/src/main/java/org/onap/aaf/cadi/enduser/SimpleRESTClient.java

   1 /**
   2  * ============LICENSE_START====================================================
   3  * org.onap.aaf
   4  * ===========================================================================
   5  * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
   6  * ===========================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END====================================================
  19  *
  20  */
  21 package org.onap.aaf.cadi.enduser;
  22
  23 import java.io.IOException;
  24 import java.io.OutputStream;
  25 import java.io.PrintWriter;
  26 import java.net.ConnectException;
  27 import java.security.Principal;
  28
  29 import org.onap.aaf.cadi.CadiException;
  30 import org.onap.aaf.cadi.LocatorException;
  31 import org.onap.aaf.cadi.client.EClient;
  32 import org.onap.aaf.cadi.client.Future;
  33 import org.onap.aaf.cadi.client.Rcli;
  34 import org.onap.aaf.cadi.client.Result;
  35 import org.onap.aaf.cadi.client.Retryable;
  36 import org.onap.aaf.cadi.config.Config;
  37 import org.onap.aaf.cadi.oauth.TimedToken;
  38 import org.onap.aaf.cadi.oauth.TokenClient;
  39 import org.onap.aaf.cadi.oauth.TokenClientFactory;
  40 import org.onap.aaf.cadi.oauth.TzClient;
  41 import org.onap.aaf.cadi.principal.TaggedPrincipal;
  42 import org.onap.aaf.misc.env.APIException;
  43 import org.onap.aaf.misc.env.util.StringBuilderWriter;
  44
  45 public class SimpleRESTClient {
  46         private static final String APPLICATION_JSON = "application/json";
  47         private static final String[] EMPTY = new String[0];
  48         private final TokenClient tokenClient;
  49         private final TzClient restClient;
  50         private int callTimeout;
  51         private String client_id;
  52         private String app;
  53         private String chain;
  54         private Headers headers = new Headers() {
  55                 @Override
  56                 public String[] headers() {
  57                         return EMPTY;
  58                 }};
  59
  60         public SimpleRESTClient(final TokenClientFactory tcf, final String tokenURL, final String endpoint, final String[] scope) throws CadiException, LocatorException, APIException {
  61                 callTimeout = Integer.parseInt(tcf.access.getProperty(Config.AAF_CALL_TIMEOUT,Config.AAF_CALL_TIMEOUT_DEF));
  62                 tokenClient = tcf.newClient(tokenURL);
  63                 Result<TimedToken> rtt = tokenClient.getToken(scope);
  64                 if(rtt.isOK()) {
  65                         restClient = tcf.newTzClient(endpoint);
  66
  67                         if((client_id = tcf.access.getProperty(Config.AAF_APPID, null))==null) {
  68                                 if((client_id = tcf.access.getProperty(Config.CADI_ALIAS, null))==null) {
  69                                         throw new CadiException(Config.AAF_APPID + " or " + Config.CADI_ALIAS + " needs to be defined");
  70                                 }
  71                         }
  72                         try {
  73                                 restClient.setToken(client_id,rtt.value);
  74                         } catch (IOException e) {
  75                                 throw new CadiException(e);
  76                         }
  77                 } else {
  78                         throw new CadiException(rtt.error);
  79                 }
  80         }
  81
  82         public SimpleRESTClient timeout(int newTimeout) {
  83                 callTimeout = newTimeout;
  84                 return this;
  85         }
  86
  87         //Format:<ID>:<APP>:<protocol>[:AS][,<ID>:<APP>:<protocol>]*
  88         public SimpleRESTClient endUser(Principal principal) {
  89                 if(principal==null) {
  90                         chain = null;
  91                 } else {
  92                         if(principal instanceof TaggedPrincipal) {
  93                                 TaggedPrincipal tp = (TaggedPrincipal)principal;
  94                                 chain = tp.getName() + ':' + (app==null?"":app) + ':' + tp.tag() + ":AS";
  95                         } else {
  96                                 chain = principal.getName() + (app==null?"":':'+app);
  97                         }
  98                 }
  99                 return this;
 100         }
 101
 102         /**
 103          * Single Threaded Class for building up content
 104          * @author jg1555
 105          *
 106          */
 107         public static class Input {
 108                 private static final byte[] EMPTY_STREAM_BYTES = "".getBytes();
 109
 110                 private String content;
 111                 private StringBuilder sb;
 112
 113                 public Input() {
 114                         content = null;
 115                         sb = null;
 116                 }
 117
 118                 public Input(final String content) {
 119                         this.content = content;
 120                 }
 121
 122                 public void set(final String content) {
 123                         this.content = content;
 124                 }
 125
 126                 public PrintWriter writer() {
 127                         return new PrintWriter(new StringBuilderWriter(builder()));
 128                 }
 129
 130                 public StringBuilder builder() {
 131                         if(sb==null) {
 132                                 sb = new StringBuilder();
 133                                 content = null;
 134                         }
 135                         return sb;
 136                 }
 137
 138                 /**
 139                  * Reuse StringBuilder object
 140                  */
 141                 public void clear() {
 142                         content = null;
 143                         if(sb!=null) {
 144                                 sb.setLength(0);
 145                         }
 146                 }
 147
 148                 @Override
 149                 public String toString() {
 150                         if(content!=null) {
 151                                 return content;
 152                         } else if(sb!=null) {
 153                                 return sb.toString();
 154                         } else {
 155                                 return "";
 156                         }
 157                 }
 158
 159                 public byte[] getBytes() {
 160                         byte[] rv;
 161                         if(content==null) {
 162                                 if(sb==null) {
 163                                         rv = EMPTY_STREAM_BYTES;
 164                                 } else {
 165                                         rv = sb.toString().getBytes();
 166                                 }
 167                         } else {
 168                                 rv = content.getBytes();
 169                         }
 170                         content = null;
 171                         return rv;
 172                 }
 173         }
 174
 175         /////////////////////////////////////////////////////////////
 176         //
 177         // CREATE
 178         //
 179         /////////////////////////////////////////////////////////////
 180         public void create(final String path, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
 181                 post(path,APPLICATION_JSON, input);
 182         }
 183
 184         public void post(final String path, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
 185                 post(path,APPLICATION_JSON, input);
 186         }
 187
 188         public void post(final String path, final String contentType, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
 189                 Future<Void> future = restClient.best(new Retryable<Future<Void>>() {
 190                         @Override
 191                         public Future<Void> code(Rcli<?> client) throws CadiException, ConnectException, APIException {
 192                                 return client.create(path, contentType, new ETransfer(input));
 193                         }
 194                 });
 195                 if(!future.get(callTimeout)) {
 196                         throw new RESTException(future);
 197                 }
 198         }
 199
 200         /////////////////////////////////////////////////////////////
 201         //
 202         // READ
 203         //
 204         /////////////////////////////////////////////////////////////
 205         public String read(final String path) throws RESTException, CadiException, LocatorException, APIException  {
 206                 return get(path,APPLICATION_JSON);
 207         }
 208
 209         public String get(final String path) throws RESTException, CadiException, LocatorException, APIException  {
 210                 return get(path,APPLICATION_JSON);
 211         }
 212
 213         public String get(final String path, final String accepts) throws RESTException, CadiException, LocatorException, APIException  {
 214                 Future<String> future = restClient.best(new Retryable<Future<String>>() {
 215                         @Override
 216                         public Future<String> code(Rcli<?> client) throws CadiException, ConnectException, APIException {
 217                                 return client.read(path,accepts, headers());
 218                         }
 219                 });
 220                 if(future.get(callTimeout)) {
 221                         return future.value;
 222                 } else {
 223                         throw new RESTException(future);
 224                 }
 225         }
 226
 227         /////////////////////////////////////////////////////////////
 228         //
 229         // UPDATE
 230         //
 231         /////////////////////////////////////////////////////////////
 232
 233         public String update(final String path, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
 234                 return put(path,APPLICATION_JSON, input);
 235         }
 236
 237         public String put(final String path, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
 238                 return put(path,APPLICATION_JSON, input);
 239         }
 240
 241         public String put(final String path, final String contentType, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
 242                 Future<String> future = restClient.best(new Retryable<Future<String>>() {
 243                         @Override
 244                         public Future<String> code(Rcli<?> client) throws CadiException, ConnectException, APIException {
 245                                 return client.update(path, contentType, new ETransfer(input));
 246                         }
 247                 });
 248                 if(future.get(callTimeout)) {
 249                         return future.value;
 250                 } else {
 251                         throw new RESTException(future);
 252                 }
 253         }
 254
 255         /////////////////////////////////////////////////////////////
 256         //
 257         // DELETE
 258         //
 259         /////////////////////////////////////////////////////////////
 260         public void delete(final String path) throws RESTException, CadiException, LocatorException, APIException  {
 261                 delete(path,APPLICATION_JSON);
 262         }
 263
 264         public void delete(final String path, final String contentType) throws RESTException, CadiException, LocatorException, APIException  {
 265                 Future<Void> future = restClient.best(new Retryable<Future<Void>>() {
 266                         @Override
 267                         public Future<Void> code(Rcli<?> client) throws CadiException, ConnectException, APIException {
 268                                 return client.delete(path, contentType);
 269                         }
 270                 });
 271                 if(!future.get(callTimeout)) {
 272                         throw new RESTException(future);
 273                 }
 274         }
 275
 276         /////////////////////////////////////////////////////////////
 277
 278         private static class ETransfer implements EClient.Transfer {
 279                 private Input input;
 280                 public ETransfer(final Input input) {
 281                         this.input = input;
 282                 }
 283
 284                 @Override
 285                 public void transfer(OutputStream os) throws IOException, APIException {
 286                         os.write(input.getBytes());
 287                 }
 288         }
 289
 290         public interface Headers {
 291                 String[] headers();
 292         }
 293
 294         public String[] headers() {
 295                 if(chain==null) {
 296                         return headers.headers();
 297                 } else {
 298                         String[] strs = headers.headers();
 299                         String[] rv = new String[strs.length+2];
 300                         rv[0]=Config.CADI_USER_CHAIN;
 301                         rv[1]=chain;
 302                         for(int i = 0;i<strs.length;++i) {
 303                                 rv[i+2]=strs[i];
 304                         }
 305                         return rv;
 306                 }
 307         }
 308 }