summaryrefslogtreecommitdiffstats
path: root/src/org/apache/http/client/utils/URLEncodedUtils.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/org/apache/http/client/utils/URLEncodedUtils.java')
-rw-r--r--src/org/apache/http/client/utils/URLEncodedUtils.java191
1 files changed, 191 insertions, 0 deletions
diff --git a/src/org/apache/http/client/utils/URLEncodedUtils.java b/src/org/apache/http/client/utils/URLEncodedUtils.java
new file mode 100644
index 0000000..8b08f90
--- /dev/null
+++ b/src/org/apache/http/client/utils/URLEncodedUtils.java
@@ -0,0 +1,191 @@
+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/client/utils/URLEncodedUtils.java $
+ * $Revision: 655107 $
+ * $Date: 2008-05-10 08:20:42 -0700 (Sat, 10 May 2008) $
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation. For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http.client.utils;
+
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.URI;
+import java.net.URLDecoder;
+import java.net.URLEncoder;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Scanner;
+import org.apache.http.Header;
+import org.apache.http.HttpEntity;
+import org.apache.http.NameValuePair;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.protocol.HTTP;
+import org.apache.http.util.EntityUtils;
+
+/**
+ * A collection of utilities for encoding URLs.
+ */
+public class URLEncodedUtils {
+
+ public static final String CONTENT_TYPE = "application/x-www-form-urlencoded";
+ private static final String PARAMETER_SEPARATOR = "&";
+ private static final String NAME_VALUE_SEPARATOR = "=";
+
+ /**
+ * Returns a list of {@link NameValuePair NameValuePairs} as built from the
+ * URI's query portion. For example, a URI of
+ * http://example.org/path/to/file?a=1&b=2&c=3 would return a list of three
+ * NameValuePairs, one for a=1, one for b=2, and one for c=3.
+ * <p>
+ * This is typically useful while parsing an HTTP PUT.
+ *
+ * @param uri
+ * uri to parse
+ * @param encoding
+ * encoding to use while parsing the query
+ */
+ public static List <NameValuePair> parse (final URI uri, final String encoding) {
+ List <NameValuePair> result = Collections.emptyList();
+ final String query = uri.getRawQuery();
+ if (query != null && query.length() > 0) {
+ result = new ArrayList <NameValuePair>();
+ parse(result, new Scanner(query), encoding);
+ }
+ return result;
+ }
+
+ /**
+ * Returns a list of {@link NameValuePair NameValuePairs} as parsed from an
+ * {@link HttpEntity}. The encoding is taken from the entity's
+ * Content-Encoding header.
+ * <p>
+ * This is typically used while parsing an HTTP POST.
+ *
+ * @param entity
+ * The entity to parse
+ * @throws IOException
+ * If there was an exception getting the entity's data.
+ */
+ public static List <NameValuePair> parse (
+ final HttpEntity entity) throws IOException {
+ List <NameValuePair> result = Collections.emptyList();
+ if (isEncoded(entity)) {
+ final String content = EntityUtils.toString(entity);
+ final Header encoding = entity.getContentEncoding();
+ if (content != null && content.length() > 0) {
+ result = new ArrayList <NameValuePair>();
+ parse(result, new Scanner(content),
+ encoding != null ? encoding.getValue() : null);
+ }
+ }
+ return result;
+ }
+
+ /**
+ * Returns true if the entity's Content-Type header is
+ * <code>application/x-www-form-urlencoded</code>.
+ */
+ public static boolean isEncoded (final HttpEntity entity) {
+ final Header contentType = entity.getContentType();
+ return (contentType != null && contentType.getValue().equalsIgnoreCase(CONTENT_TYPE));
+ }
+
+ /**
+ * Adds all parameters within the Scanner to the list of
+ * <code>parameters</code>, as encoded by <code>encoding</code>. For
+ * example, a scanner containing the string <code>a=1&b=2&c=3</code> would
+ * add the {@link NameValuePair NameValuePairs} a=1, b=2, and c=3 to the
+ * list of parameters.
+ *
+ * @param parameters
+ * List to add parameters to.
+ * @param scanner
+ * Input that contains the parameters to parse.
+ * @param encoding
+ * Encoding to use when decoding the parameters.
+ */
+ public static void parse (
+ final List <NameValuePair> parameters,
+ final Scanner scanner,
+ final String encoding) {
+ scanner.useDelimiter(PARAMETER_SEPARATOR);
+ while (scanner.hasNext()) {
+ final String[] nameValue = scanner.next().split(NAME_VALUE_SEPARATOR);
+ if (nameValue.length == 0 || nameValue.length > 2)
+ throw new IllegalArgumentException("bad parameter");
+
+ final String name = decode(nameValue[0], encoding);
+ String value = null;
+ if (nameValue.length == 2)
+ value = decode(nameValue[1], encoding);
+ parameters.add(new BasicNameValuePair(name, value));
+ }
+ }
+
+ /**
+ * Returns a String that is suitable for use as an <code>application/x-www-form-urlencoded</code>
+ * list of parameters in an HTTP PUT or HTTP POST.
+ *
+ * @param parameters The parameters to include.
+ * @param encoding The encoding to use.
+ */
+ public static String format (
+ final List <? extends NameValuePair> parameters,
+ final String encoding) {
+ final StringBuilder result = new StringBuilder();
+ for (final NameValuePair parameter : parameters) {
+ final String encodedName = encode(parameter.getName(), encoding);
+ final String value = parameter.getValue();
+ final String encodedValue = value != null ? encode(value, encoding) : "";
+ if (result.length() > 0)
+ result.append(PARAMETER_SEPARATOR);
+ result.append(encodedName);
+ result.append(NAME_VALUE_SEPARATOR);
+ result.append(encodedValue);
+ }
+ return result.toString();
+ }
+
+ private static String decode (final String content, final String encoding) {
+ try {
+ return URLDecoder.decode(content,
+ encoding != null ? encoding : HTTP.DEFAULT_CONTENT_CHARSET);
+ } catch (UnsupportedEncodingException problem) {
+ throw new IllegalArgumentException(problem);
+ }
+ }
+
+ private static String encode (final String content, final String encoding) {
+ try {
+ return URLEncoder.encode(content,
+ encoding != null ? encoding : HTTP.DEFAULT_CONTENT_CHARSET);
+ } catch (UnsupportedEncodingException problem) {
+ throw new IllegalArgumentException(problem);
+ }
+ }
+
+}