org.eclipse.jetty.client.util.FormContentProvider Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2018 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.client.util;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.nio.charset.UnsupportedCharsetException;
import org.eclipse.jetty.client.api.ContentProvider;
import org.eclipse.jetty.util.Fields;
/**
* A {@link ContentProvider} for form uploads with the
* "application/x-www-form-urlencoded" content type.
*/
public class FormContentProvider extends StringContentProvider
{
public FormContentProvider(Fields fields)
{
this(fields, StandardCharsets.UTF_8);
}
public FormContentProvider(Fields fields, Charset charset)
{
super("application/x-www-form-urlencoded", convert(fields, charset), charset);
}
public static String convert(Fields fields)
{
return convert(fields, StandardCharsets.UTF_8);
}
public static String convert(Fields fields, Charset charset)
{
// Assume 32 chars between name and value.
StringBuilder builder = new StringBuilder(fields.getSize() * 32);
for (Fields.Field field : fields)
{
for (String value : field.getValues())
{
if (builder.length() > 0)
builder.append("&");
builder.append(encode(field.getName(), charset)).append("=").append(encode(value, charset));
}
}
return builder.toString();
}
private static String encode(String value, Charset charset)
{
try
{
return URLEncoder.encode(value, charset.name());
}
catch (UnsupportedEncodingException x)
{
throw new UnsupportedCharsetException(charset.name());
}
}
}