001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.juneau.rest.httppart;
018
019import static org.apache.juneau.commons.utils.IoUtils.*;
020import static org.apache.juneau.commons.utils.ThrowableUtils.*;
021import static org.apache.juneau.commons.utils.Utils.*;
022import static org.apache.juneau.httppart.HttpPartType.*;
023
024import java.io.*;
025import java.lang.reflect.*;
026import java.util.*;
027import java.util.regex.*;
028
029import org.apache.http.*;
030import org.apache.juneau.*;
031import org.apache.juneau.commons.utils.*;
032import org.apache.juneau.httppart.*;
033import org.apache.juneau.rest.*;
034
035/**
036 * Represents a single form-data parameter on an HTTP request.
037 *
038 * <p>
039 * Typically accessed through the {@link RequestFormParams} class.
040 *
041 * <p>
042 *    Some important methods on this class are:
043 * </p>
044 * <ul class='javatree'>
045 *    <li class='jc'>{@link RequestFormParam}
046 *    <ul class='spaced-list'>
047 *       <li>Methods for retrieving simple string values:
048 *       <ul class='javatreec'>
049 *          <li class='jm'>{@link RequestFormParam#asString() asString()}
050 *          <li class='jm'>{@link RequestFormParam#get() get()}
051 *          <li class='jm'>{@link RequestFormParam#isPresent() isPresent()}
052 *          <li class='jm'>{@link RequestFormParam#orElse(String) orElse(String)}
053 *       </ul>
054 *       <li>Methods for retrieving as other common types:
055 *       <ul class='javatreec'>
056 *          <li class='jm'>{@link RequestFormParam#asBoolean() asBoolean()}
057 *          <li class='jm'>{@link RequestFormParam#asBooleanPart() asBooleanPart()}
058 *          <li class='jm'>{@link RequestFormParam#asCsvArray() asCsvArray()}
059 *          <li class='jm'>{@link RequestFormParam#asCsvArrayPart() asCsvArrayPart()}
060 *          <li class='jm'>{@link RequestFormParam#asDate() asDate()}
061 *          <li class='jm'>{@link RequestFormParam#asDatePart() asDatePart()}
062 *          <li class='jm'>{@link RequestFormParam#asInteger() asInteger()}
063 *          <li class='jm'>{@link RequestFormParam#asIntegerPart() asIntegerPart()}
064 *          <li class='jm'>{@link RequestFormParam#asLong() asLong()}
065 *          <li class='jm'>{@link RequestFormParam#asLongPart() asLongPart()}
066 *          <li class='jm'>{@link RequestFormParam#asMatcher(Pattern) asMatcher(Pattern)}
067 *          <li class='jm'>{@link RequestFormParam#asMatcher(String) asMatcher(String)}
068 *          <li class='jm'>{@link RequestFormParam#asMatcher(String,int) asMatcher(String,int)}
069 *          <li class='jm'>{@link RequestFormParam#asStringPart() asStringPart()}
070 *          <li class='jm'>{@link RequestFormParam#asUriPart() asUriPart()}
071 *       </ul>
072 *       <li>Methods for retrieving as custom types:
073 *       <ul class='javatreec'>
074 *          <li class='jm'>{@link RequestFormParam#as(Class) as(Class)}
075 *          <li class='jm'>{@link RequestFormParam#as(ClassMeta) as(ClassMeta)}
076 *          <li class='jm'>{@link RequestFormParam#as(Type,Type...) as(Type,Type...)}
077 *          <li class='jm'>{@link RequestFormParam#parser(HttpPartParserSession) parser(HttpPartParserSession)}
078 *          <li class='jm'>{@link RequestFormParam#schema(HttpPartSchema) schema(HttpPartSchema)}
079 *       </ul>
080 *       <li>Methods for performing assertion checks:
081 *       <ul class='javatreec'>
082 *          <li class='jm'>{@link RequestFormParam#assertCsvArray() assertCsvArray()}
083 *          <li class='jm'>{@link RequestFormParam#assertDate() assertDate()}
084 *          <li class='jm'>{@link RequestFormParam#assertInteger() assertInteger()}
085 *          <li class='jm'>{@link RequestFormParam#assertLong() assertLong()}
086 *          <li class='jm'>{@link RequestFormParam#assertString() assertString()}
087 *       </ul>
088 *       <li>Other methods:
089 *       <ul class='javatreec'>
090 *          <li class='jm'>{@link RequestFormParam#getName() getName()}
091 *          <li class='jm'>{@link RequestFormParam#getValue() getValue()}
092*     </ul>
093 * </ul>
094 *
095 * <h5 class='section'>See Also:</h5><ul>
096 *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/HttpParts">HTTP Parts</a>
097 * </ul>
098 */
099@SuppressWarnings("resource")
100public class RequestFormParam extends RequestHttpPart implements NameValuePair {
101
102   private final jakarta.servlet.http.Part part;
103
104   /**
105    * Constructor.
106    *
107    * @param request The request object.
108    * @param part The HTTP part.
109    */
110   public RequestFormParam(RestRequest request, jakarta.servlet.http.Part part) {
111      super(FORMDATA, request, part.getName(), null);
112      this.part = part;
113   }
114
115   /**
116    * Constructor.
117    *
118    * @param request The request object.
119    * @param name The parameter name.
120    * @param value The parameter value.
121    */
122   public RequestFormParam(RestRequest request, String name, String value) {
123      super(FORMDATA, request, name, value);
124      this.part = null;
125   }
126
127   @Override /* Overridden from RequestHttpPart */
128   public RequestFormParam def(String def) {
129      super.def(def);
130      return this;
131   }
132
133   /**
134    * Returns the content type of this part.
135    *
136    * @return The content type of this part, or <jk>null</jk> if not known.
137    */
138   public String getContentType() { return (part == null ? null : part.getContentType()); }
139
140   /**
141    * Returns the value of the specified mime header as a String.
142    *
143    * <p>
144    * If the Part did not include a header of the specified name, this method returns null.
145    * If there are multiple headers with the same name, this method returns the first header in the part.
146    * The header name is case insensitive.
147    * You can use this method with any request header.
148    *
149    * @param name The header name.
150    * @return The value of the specified mime header as a String.
151    */
152   public String getHeader(String name) {
153      return part.getHeader(name);
154   }
155
156   /**
157    * Returns the header names of this param.
158    *
159    * @return The header names of this param.
160    */
161   public Collection<String> getHeaderNames() { return part.getHeaderNames(); }
162
163   /**
164    * Returns the values of the param header with the given name.
165    *
166    * @param name The param name.
167    * @return The values of the param header with the given name.
168    */
169   public Collection<String> getHeaders(String name) {
170      return part.getHeaders(name);
171   }
172
173   /**
174    * Returns the size of this file.
175    *
176    * @return A long specifying the size of this part, in bytes.
177    */
178   public long getSize() { return part.getSize(); }
179
180   /**
181    * Returns this part value as an input stream.
182    *
183    * @return This part value as an input stream.
184    * @throws IOException If an error occurs in retrieving the content.
185    */
186   public InputStream getStream() throws IOException {
187      if (nn(value))
188         return new ByteArrayInputStream(value.getBytes(UTF8));
189      return part.getInputStream();
190   }
191
192   /**
193    * Returns the file name specified by the client.
194    *
195    * @return The file name specified by the client.
196    */
197   public String getSubmittedFileName() { return part.getSubmittedFileName(); }
198
199   @Override /* Overridden from RequestHttpPart */
200   public String getValue() {
201      if (value == null && nn(part))
202         try {
203            value = IoUtils.read(part.getInputStream());
204         } catch (IOException e) {
205            throw toRex(e);
206         }
207      return value;
208   }
209
210   @Override /* Overridden from RequestHttpPart */
211   public RequestFormParam parser(HttpPartParserSession value) {
212      super.parser(value);
213      return this;
214   }
215
216   @Override /* Overridden from RequestHttpPart */
217   public RequestFormParam schema(HttpPartSchema value) {
218      super.schema(value);
219      return this;
220   }
221}