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package org.seasar.cubby.filter; |
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import java.io.IOException; |
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import java.io.UnsupportedEncodingException; |
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import java.nio.charset.Charset; |
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import javax.servlet.Filter; |
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import javax.servlet.FilterChain; |
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import javax.servlet.FilterConfig; |
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import javax.servlet.ServletException; |
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import javax.servlet.ServletRequest; |
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import javax.servlet.ServletResponse; |
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import javax.servlet.http.HttpServletRequest; |
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import javax.servlet.http.HttpServletRequestWrapper; |
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74 | 7 | public class EncodingFilter implements Filter { |
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76 | 1 | private static final String ALREADY_FILTERED_ATTRIBUTE_NAME = EncodingFilter.class |
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.getName() |
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+ ".FILTERED"; |
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public static final String ENCODING = "encoding"; |
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public static final String FORCE_ENCODING = "forceEncoding"; |
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public static final String URI_ENCODING = "URIEncoding"; |
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public static final String URI_BYTES_ENCODING = "URIBytesEncoding"; |
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public static final String DEFAULT_URI_BYTE_ENCODING = "ISO-8859-1"; |
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private String encoding; |
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99 | 7 | private boolean forceEncoding = false; |
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private String uriEncoding; |
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private String uriBytesEncoding; |
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public void init(final FilterConfig config) throws ServletException { |
111 | 7 | encoding = config.getInitParameter(ENCODING); |
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try { |
113 | 7 | validateEncoding(encoding); |
114 | 0 | } catch (final UnsupportedEncodingException e) { |
115 | 0 | throw new ServletException(e); |
116 | 7 | } |
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118 | 7 | final String forceEncodingString = config |
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.getInitParameter(FORCE_ENCODING); |
120 | 7 | if (forceEncodingString != null) { |
121 | 5 | forceEncoding = Boolean.parseBoolean(forceEncodingString); |
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} |
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124 | 7 | uriEncoding = config.getInitParameter(URI_ENCODING); |
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try { |
126 | 7 | validateEncoding(uriEncoding); |
127 | 0 | } catch (final UnsupportedEncodingException e) { |
128 | 0 | throw new ServletException(e); |
129 | 7 | } |
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131 | 7 | uriBytesEncoding = config.getInitParameter(URI_BYTES_ENCODING); |
132 | 7 | if (uriBytesEncoding == null) { |
133 | 6 | uriBytesEncoding = DEFAULT_URI_BYTE_ENCODING; |
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} |
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try { |
136 | 7 | validateEncoding(uriBytesEncoding); |
137 | 0 | } catch (final UnsupportedEncodingException e) { |
138 | 0 | throw new ServletException(e); |
139 | 7 | } |
140 | 7 | } |
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private void validateEncoding(final String encoding) |
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throws UnsupportedEncodingException { |
152 | 21 | if (encoding != null && !Charset.isSupported(encoding)) { |
153 | 0 | throw new UnsupportedEncodingException(encoding); |
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} |
155 | 21 | } |
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public void destroy() { |
161 | 7 | } |
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public void doFilter(final ServletRequest request, |
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final ServletResponse response, final FilterChain chain) |
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throws IOException, ServletException { |
169 | 7 | if (request.getAttribute(ALREADY_FILTERED_ATTRIBUTE_NAME) == null) { |
170 | 7 | request.setAttribute(ALREADY_FILTERED_ATTRIBUTE_NAME, Boolean.TRUE); |
171 | 7 | if (request.getCharacterEncoding() == null || forceEncoding) { |
172 | 5 | request.setCharacterEncoding(encoding); |
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} |
174 | 7 | if (uriEncoding == null) { |
175 | 5 | chain.doFilter(request, response); |
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} else { |
177 | 2 | final ServletRequest wrapper = new EncodingHttpServletRequestWrapper( |
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(HttpServletRequest) request, uriEncoding, |
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uriBytesEncoding); |
180 | 2 | chain.doFilter(wrapper, response); |
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} |
182 | 7 | request.removeAttribute(ALREADY_FILTERED_ATTRIBUTE_NAME); |
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} else { |
184 | 0 | chain.doFilter(request, response); |
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} |
186 | 7 | } |
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193 | 7 | private static class EncodingHttpServletRequestWrapper extends |
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HttpServletRequestWrapper { |
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private final String uriEncoding; |
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private final String uriBytesEncoding; |
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public EncodingHttpServletRequestWrapper( |
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final HttpServletRequest request, final String uriEncoding, |
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final String uriBytesEncoding) throws IOException { |
217 | 2 | super(request); |
218 | 2 | this.uriEncoding = uriEncoding; |
219 | 2 | this.uriBytesEncoding = uriBytesEncoding; |
220 | 2 | } |
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@Override |
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public String getServletPath() { |
224 | 2 | return rebuild(super.getServletPath(), uriEncoding, |
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uriBytesEncoding); |
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} |
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@Override |
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public String getPathInfo() { |
230 | 2 | return rebuild(super.getPathInfo(), uriEncoding, uriBytesEncoding); |
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} |
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private String rebuild(final String str, final String encoding, |
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final String bytesEncoding) { |
247 | 4 | if (str == null || encoding == null) { |
248 | 0 | return str; |
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} |
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try { |
251 | 4 | return new String(str.getBytes(bytesEncoding), encoding); |
252 | 0 | } catch (final UnsupportedEncodingException e) { |
253 | 0 | throw new IllegalStateException(e); |
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} |
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} |
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} |
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} |