hazendaz / httpunit / 656

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74.52

/src/main/java/com/meterware/servletunit/ServletUnitHttpResponse.java

/*
 * MIT License
 *
 * Copyright 2011-2025 Russell Gold
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
 * to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
 * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
package com.meterware.servletunit;

import com.meterware.httpunit.HttpUnitUtils;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.TimeZone;

import javax.servlet.ServletOutputStream;
import javax.servlet.WriteListener;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;

/**
 * The Class ServletUnitHttpResponse.
 */
class ServletUnitHttpResponse implements HttpServletResponse {

    /** The Constant RFC1123_DATE_SPEC. */
    // rfc1123-date is "Sun, 06 Nov 1994 08:49:37 GMT"
    private static final String RFC1123_DATE_SPEC = "EEE, dd MMM yyyy HH:mm:ss z";

    /** The committed. */
    private boolean _committed;

    /** The locale. */
    private Locale _locale = Locale.getDefault();

    /** The Constant ENCODING_MAP. */
    private static final Hashtable ENCODING_MAP = new Hashtable<>();

    /**
     * @deprecated Use encodeURL(String url)
     */
    @Deprecated
    @Override
    public String encodeUrl(String url) {
        return encodeURL(url);
    }

    /**
     * Adds the specified cookie to the response. It can be called multiple times to set more than one cookie.
     */
    @Override
    public void addCookie(Cookie cookie) {
        _cookies.add(cookie);
    }

    /**
     * Checks whether the response message header has a field with the specified name.
     */
    @Override
    public boolean containsHeader(String name) {
        return _headers.containsKey(name.toUpperCase());
    }

    /**
     * @deprecated Use encodeRedirectURL(String url)
     **/
    @Deprecated
    @Override
    public String encodeRedirectUrl(String url) {
        return encodeRedirectURL(url);
    }

    /**
     * Encodes the specified URL by including the session ID in it, or, if encoding is not needed, returns the URL
     * unchanged. The implementation of this method should include the logic to determine whether the session ID needs
     * to be encoded in the URL. For example, if the browser supports cookies, or session tracking is turned off, URL
     * encoding is unnecessary.
     **/
    @Override
    public String encodeURL(String url) {
        return url;
    }

    /**
     * Encodes the specified URL for use in the <code>sendRedirect</code> method or, if encoding is not needed, returns
     * the URL unchanged. The implementation of this method should include the logic to determine whether the session ID
     * needs to be encoded in the URL. Because the rules for making this determination differ from those used to decide
     * whether to encode a normal link, this method is seperate from the <code>encodeUrl</code> method.
     **/
    @Override
    public String encodeRedirectURL(String url) {
        return url;
    }

    /**
     * Sends a temporary redirect response to the client using the specified redirect location URL. The URL must be
     * absolute (for example, <code><em>https://hostname/path/file.html</em></code>). Relative URLs are not permitted
     * here.
     */
    @Override
    public void sendRedirect(String location) throws IOException {
        setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
        setHeader("Location", location);
    }

    /**
     * Sends an error response to the client using the specified status code and descriptive message. If setStatus has
     * previously been called, it is reset to the error status code. The message is sent as the body of an HTML page,
     * which is returned to the user to describe the problem. The page is sent with a default HTML header; the message
     * is enclosed in simple body tags (&lt;body&gt;&lt;/body&gt;).
     **/
    @Override
    public void sendError(int sc) throws IOException {
        sendError(sc, "");
    }

    /**
     * Sends an error response to the client using the specified status code and descriptive message. If setStatus has
     * previously been called, it is reset to the error status code. The message is sent as the body of an HTML page,
     * which is returned to the user to describe the problem. The page is sent with a default HTML header; the message
     * is enclosed in simple body tags (&lt;body&gt;&lt;/body&gt;).
     **/
    @Override
    public void sendError(int sc, String msg) throws IOException {
        setStatus(sc);
        _statusMessage = msg;

        _writer = null;
        _servletStream = null;

        setContentType("text/html");
        getWriter().println("<html><head><title>" + msg + "</title></head><body>" + msg + "</body></html>");
    }

    /**
     * Sets the status code for this response. This method is used to set the return status code when there is no error
     * (for example, for the status codes SC_OK or SC_MOVED_TEMPORARILY). If there is an error, the
     * <code>sendError</code> method should be used instead.
     **/
    @Override
    public void setStatus(int sc) {
        _status = sc;
    }

    /**
     * @deprecated As of version 2.1, due to ambiguous meaning of the message parameter. To set a status code use
     *             setStatus(int), to send an error with a description use sendError(int, String). Sets the status code
     *             and message for this response.
     **/
    @Deprecated
    @Override
    public void setStatus(int sc, String msg) {
        setStatus(sc);
    }

    /**
     * Adds a field to the response header with the given name and value. If the field had already been set, the new
     * value overwrites the previous one. The <code>containsHeader</code> method can be used to test for the presence of
     * a header before setting its value.
     **/
    @Override
    public void setHeader(String name, String value) {
        ArrayList values = new ArrayList<>();
        values.add(value);
        synchronized (_headers) {
            _headers.put(name.toUpperCase(), values);
        }
    }

    /**
     * Adds a field to the response header with the given name and integer value. If the field had already been set, the
     * new value overwrites the previous one. The <code>containsHeader</code> method can be used to test for the
     * presence of a header before setting its value.
     **/
    @Override
    public void setIntHeader(String name, int value) {
        setHeader(name, asHeaderValue(value));
    }

    /**
     * Adds a field to the response header with the given name and integer value. If the field had already been set, the
     * new value overwrites the previous one. The <code>containsHeader</code> method can be used to test for the
     * presence of a header before setting its value.
     *
     * @param name
     *            the name
     * @param value
     *            the value
     */
    public void setLongHeader(String name, long value) {
        setHeader(name, asHeaderLongValue(value));
    }

    /**
     * As header value.
     *
     * @param value
     *            the value
     *
     * @return the string
     */
    private String asHeaderValue(int value) {
        return Integer.toString(value);
    }

    /**
     * As header long value.
     *
     * @param value
     *            the value
     *
     * @return the string
     */
    private String asHeaderLongValue(long value) {
        return Long.toString(value);
    }

    /**
     * Adds a field to the response header with the given name and date-valued field. The date is specified in terms of
     * milliseconds since the epoch. If the date field had already been set, the new value overwrites the previous one.
     * The <code>containsHeader</code> method can be used to test for the presence of a header before setting its value.
     **/
    @Override
    public void setDateHeader(String name, long date) {
        setHeader(name, asDateHeaderValue(date));
    }

    /**
     * As date header value.
     *
     * @param date
     *            the date
     *
     * @return the string
     */
    private String asDateHeaderValue(long date) {
        Date value = new Date(date);
        SimpleDateFormat formatter = new SimpleDateFormat(RFC1123_DATE_SPEC, Locale.US);
        formatter.setTimeZone(TimeZone.getTimeZone("Greenwich Mean Time"));
        return formatter.format(value);
    }

    /**
     * Returns the name of the character set encoding used for the MIME body sent by this response.
     **/
    @Override
    public String getCharacterEncoding() {
        return _encoding == null ? StandardCharsets.ISO_8859_1.name() : _encoding;
    }

    /**
     * Sets the content type of the response the server sends to the client. The content type may include the type of
     * character encoding used, for example, <code>text/html; charset=ISO-8859-4</code>.
     * <p>
     * You can only use this method once, and you should call it before you obtain a <code>PrintWriter</code> or
     * {@link ServletOutputStream} object to return a response.
     **/
    @Override
    public void setContentType(String type) {
        String[] typeAndEncoding = HttpUnitUtils.parseContentTypeHeader(type);

        _contentType = typeAndEncoding[0];
        if (typeAndEncoding[1] != null) {
            _encoding = typeAndEncoding[1];
        }
    }

    /**
     * Returns a {@link ServletOutputStream} suitable for writing binary data in the response. The servlet engine does
     * not encode the binary data.
     *
     * @exception IllegalStateException
     *                if you have already called the <code>getWriter</code> method
     **/
    @Override
    public ServletOutputStream getOutputStream() throws IOException {
        if (_writer != null) {
            throw new IllegalStateException("Tried to create output stream; writer already exists");
        }
        if (_servletStream == null) {
            _outputStream = new ByteArrayOutputStream();
            _servletStream = new ServletUnitOutputStream(_outputStream);
        }
        return _servletStream;
    }

    /**
     * Returns a <code>PrintWriter</code> object that you can use to send character text to the client. The character
     * encoding used is the one specified in the <code>charset=</code> property of the {@link #setContentType} method,
     * which you must call <i>before</i> you call this method.
     * <p>
     * If necessary, the MIME type of the response is modified to reflect the character encoding used.
     * <p>
     * You cannot use this method if you have already called {@link #getOutputStream} for this
     * <code>ServletResponse</code> object.
     *
     * @exception IllegalStateException
     *                if the <code>getOutputStream</code> method has already been called for this response object; in
     *                that case, you can't use this method
     **/
    @Override
    public PrintWriter getWriter() {
        if (_servletStream != null) {
            throw new IllegalStateException("Tried to create writer; output stream already exists");
        }
        if (_writer == null) {
            _outputStream = new ByteArrayOutputStream();
            _writer = new PrintWriter(new OutputStreamWriter(_outputStream, Charset.forName(getCharacterEncoding())));
        }
        return _writer;
    }

    /**
     * Sets the length of the content the server returns to the client. In HTTP servlets, this method sets the HTTP
     * Content-Length header.
     **/
    @Override
    public void setContentLength(int len) {
        setIntHeader("Content-Length", len);
    }

    // ------------------------------- the following methods are new in JSDK 2.2 ----------------------

    /**
     * Adds a response header with the given name and value. This method allows response headers to have multiple
     * values.
     **/
    @Override
    public void addHeader(String name, String value) {
        synchronized (_headers) {
            String key = name.toUpperCase();
            List values = (ArrayList) _headers.get(key);
            if (values == null) {
                values = new ArrayList<>();
                _headers.put(key, values);
            }
            values.add(value);
        }
    }

    /**
     * Adds a response header with the given name and value. This method allows response headers to have multiple
     * values.
     **/
    @Override
    public void addIntHeader(String name, int value) {
        addHeader(name, asHeaderValue(value));
    }

    /**
     * Adds a response header with the given name and value. This method allows response headers to have multiple
     * values.
     **/
    @Override
    public void addDateHeader(String name, long value) {
        addHeader(name, asDateHeaderValue(value));
    }

    /**
     * Sets the preferred buffer size for the body of the response. The servlet container will use a buffer at least as
     * large as the size requested. The actual buffer size used can be found using getBufferSize.
     **/
    @Override
    public void setBufferSize(int size) {
        if (getContents().length != 0) {
            throw new IllegalStateException("May not set buffer size after data is written");
        }
    }

    /**
     * Returns the actual buffer size used for the response. If no buffering is used, this method returns 0.
     **/
    @Override
    public int getBufferSize() {
        return 0;
    }

    /**
     * Returns a boolean indicating if the response has been committed. A committed response has already had its status
     * code and headers written.
     **/
    @Override
    public boolean isCommitted() {
        return _committed;
    }

    /**
     * Forces any content in the buffer to be written to the client. A call to this method automatically commits the
     * response, meaning the status code and headers will be written.
     **/
    @Override
    public void flushBuffer() throws IOException {
        _committed = true;
    }

    /**
     * Clears any data that exists in the buffer as well as the status code and headers. If the response has been
     * committed, this method throws an IllegalStateException.
     **/
    @Override
    public void reset() {
        resetBuffer();
        _headers.clear();
        _headersComplete = false;
        _status = SC_OK;
    }

    /**
     * Sets the locale of the response, setting the headers (including the Content-Type's charset) as appropriate. This
     * method should be called before a call to getWriter(). By default, the response locale is the default locale for
     * the server.
     **/
    @Override
    public void setLocale(Locale locale) {
        _locale = locale;
        if (_encoding == null) {
            for (Iterator it = ENCODING_MAP.entrySet().iterator(); it.hasNext();) {
                Map.Entry entry = (Map.Entry) it.next();
                String locales = (String) entry.getValue();
                if (locales.indexOf(locale.getLanguage()) >= 0 || locales.indexOf(locale.toString()) >= 0) {
                    _encoding = (String) entry.getKey();
                    return;
                }
            }
        }
    }

    /**
     * Returns the locale assigned to the response.
     **/
    @Override
    public Locale getLocale() {
        return _locale;
    }

    // ----------------------------- methods added to ServletResponse in JSDK 2.3 --------------------------------------

    /**
     * Clears the content of the underlying buffer in the response without clearing headers or status code. If the
     * response has been committed, this method throws an IllegalStateException.
     */
    @Override
    public void resetBuffer() {
        if (_committed) {
            throw new IllegalStateException("May not resetBuffer after response is committed");
        }
        _outputStream = null;
        _servletStream = null;
        _writer = null;
    }

    // ---------------------------------------------- package methods --------------------------------------------------

    /**
     * Returns the contents of this response.
     *
     * @return the contents
     */
    byte[] getContents() {
        if (_outputStream == null) {
            return new byte[0];
        }
        if (_writer != null) {
            _writer.flush();
        }
        return _outputStream.toByteArray();
    }

    /**
     * Returns the status of this response.
     **/
    @Override
    public int getStatus() {
        return _status;
    }

    /**
     * Returns the message associated with this response's status.
     *
     * @return the message
     */
    String getMessage() {
        return _statusMessage;
    }

    /**
     * Gets the header field names.
     *
     * @return the header field names
     */
    public String[] getHeaderFieldNames() {
        if (!_headersComplete) {
            completeHeaders();
        }
        List<String> names = new ArrayList<>();
        for (Enumeration e = _headers.keys(); e.hasMoreElements();) {
            names.add((String) e.nextElement());
        }
        return names.toArray(new String[0]);
    }

    /**
     * Returns the headers defined for this response.
     *
     * @param name
     *            - the name of the field to get
     *
     * @return the header field direct
     */
    String getHeaderFieldDirect(String name) {
        ArrayList values;
        synchronized (_headers) {
            values = (ArrayList) _headers.get(name.toUpperCase());
        }

        return values == null ? null : (String) values.get(0);
    }

    /**
     * Returns the headers defined for this response.
     *
     * @param name
     *            the name
     *
     * @return the header field
     */
    String getHeaderField(String name) {
        if (!_headersComplete) {
            completeHeaders();
        }
        return getHeaderFieldDirect(name);
    }

    /**
     * Return an array of all the header values associated with the specified header name, or an zero-length array if
     * there are no such header values.
     *
     * @param name
     *            Header name to look up
     *
     * @return the header fields
     */
    public String[] getHeaderFields(String name) {
        if (!_headersComplete) {
            completeHeaders();
        }
        ArrayList values;
        synchronized (_headers) {
            values = (ArrayList) _headers.get(name.toUpperCase());
        }
        if (values == null) {
            return new String[0];
        }
        String[] results = new String[values.size()];
        return (String[]) values.toArray(results);

    }

    // --------------------------------------- methods added to ServletRequest in Servlet API 2.4
    // ----------------------------

    @Override
    public void setCharacterEncoding(String string) {
        _encoding = string;
    }

    /**
     * Returns the content type defined for this response.
     **/
    @Override
    public String getContentType() {
        return _contentType;
    }

    // ------------------------------------------- private members ------------------------------------

    /** The content type. */
    private String _contentType = "text/plain";

    /** The encoding. */
    private String _encoding;

    /** The writer. */
    private PrintWriter _writer;

    /** The servlet stream. */
    private ServletOutputStream _servletStream;

    /** The output stream. */
    private ByteArrayOutputStream _outputStream;

    /** The status. */
    private int _status = SC_OK;

    /** The status message. */
    private String _statusMessage = "OK";

    /** The headers. */
    private final Hashtable _headers = new Hashtable<>();

    /** The headers complete. */
    private boolean _headersComplete;

    /** The cookies. */
    private List<Cookie> _cookies = new ArrayList<>();

    /**
     * Complete headers.
     */
    private void completeHeaders() {
        if (_headersComplete) {
            return;
        }
        addCookieHeader();
        // BR 3301056 ServletUnit handling Content-Type incorrectly
        if (getHeaderFieldDirect("Content-Type") == null) {
            setHeader("Content-Type", _contentType + "; charset=" + getCharacterEncoding());
        }
        _headersComplete = true;
    }

    /**
     * Adds the cookie header.
     */
    private void addCookieHeader() {
        if (_cookies.isEmpty()) {
            return;
        }

        StringBuilder sb = new StringBuilder();
        for (Enumeration e = Collections.enumeration(_cookies); e.hasMoreElements();) {
            Cookie cookie = (Cookie) e.nextElement();
            sb.append(cookie.getName()).append('=').append(cookie.getValue());
            if (cookie.getPath() != null) {
                sb.append(";path=").append(cookie.getPath());
            }
            if (cookie.getDomain() != null) {
                sb.append(";domain=").append(cookie.getDomain());
            }
            if (e.hasMoreElements()) {
                sb.append(',');
            }
        }
        setHeader("Set-Cookie", sb.toString());
    }

    static {
        ENCODING_MAP.put("ISO-8859-1", "ca da de en es fi fr is it nl no pt sv ");
        ENCODING_MAP.put("ISO-8859-2", "cs hr hu pl ro sh sk sl sq ");
        ENCODING_MAP.put("ISO-8859-4", "et lt lv ");
        ENCODING_MAP.put("ISO-8859-5", "be bg mk ru sr uk ");
        ENCODING_MAP.put("ISO-8859-6", "ar ");
        ENCODING_MAP.put("ISO-8859-7", "el ");
        ENCODING_MAP.put("ISO-8859-8", "iw he ");
        ENCODING_MAP.put("ISO-8859-9", "tr ");

        ENCODING_MAP.put("Shift_JIS", "ja ");
        ENCODING_MAP.put("EUC-KR", "ko ");
        ENCODING_MAP.put("TIS-620", "th ");
        ENCODING_MAP.put("GB2312", "zh ");
        ENCODING_MAP.put("Big5", "zh_TW zh_HK ");
    }

    @Override
    public String getHeader(String name) {
        return (String) _headers.get(name.toUpperCase());
    }

    @Override
    public Collection<String> getHeaders(String name) {
        List values;
        synchronized (_headers) {
            values = (ArrayList) _headers.get(name.toUpperCase());
        }
        if (values == null) {
            return Collections.emptyList();
        }
        return values;
    }

    @Override
    public Collection<String> getHeaderNames() {
        if (!_headersComplete) {
            completeHeaders();
        }
        List names = new ArrayList<>();
        for (Enumeration e = _headers.keys(); e.hasMoreElements();) {
            names.add(e.nextElement());
        }
        return names;
    }

    @Override
    public void setContentLengthLong(long len) {
        setLongHeader("Content-Length", len);
    }

}

class ServletUnitOutputStream extends ServletOutputStream {

    ServletUnitOutputStream(ByteArrayOutputStream stream) {
        _stream = stream;
    }

    @Override
    public void write(int aByte) throws IOException {
        _stream.write(aByte);
    }

    private ByteArrayOutputStream _stream;

    @Override
    public boolean isReady() {
        return false;
    }

    @Override
    public void setWriteListener(WriteListener writeListener) {
        // Do nothing
    }
}

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