X-Git-Url: https://juplo.de/gitweb/?p=percentcodec;a=blobdiff_plain;f=cachecontrol%2Fsrc%2Fmain%2Fjava%2Fde%2Fhalbekunst%2Fjuplo%2Fcachecontrol%2FAcceleratorFilter.java;h=71c799c3185466ad7b856e6bbaf1c1597fa273d1;hp=9125554cce1572eb9d12c88ea66fda6d71dabcf1;hb=61a37d1d42af6c569d61f77f1939af578060aa41;hpb=4f2efacd03f5660a1ba4b1d7b0f2380d8a9ec8ef diff --git a/cachecontrol/src/main/java/de/halbekunst/juplo/cachecontrol/AcceleratorFilter.java b/cachecontrol/src/main/java/de/halbekunst/juplo/cachecontrol/AcceleratorFilter.java index 9125554c..71c799c3 100644 --- a/cachecontrol/src/main/java/de/halbekunst/juplo/cachecontrol/AcceleratorFilter.java +++ b/cachecontrol/src/main/java/de/halbekunst/juplo/cachecontrol/AcceleratorFilter.java @@ -1,6 +1,8 @@ package de.halbekunst.juplo.cachecontrol; import java.io.IOException; +import java.io.OutputStream; +import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.text.ParseException; import java.text.SimpleDateFormat; @@ -17,14 +19,15 @@ import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; +import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; -import javax.servlet.http.HttpServletResponseWrapper; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowire; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Configurable; +import org.springframework.beans.factory.annotation.Qualifier; @@ -38,16 +41,17 @@ public class AcceleratorFilter implements Filter { private final static Map EMPTY = Collections.unmodifiableMap(new HashMap()); + public final static Integer DEFAULT_BUFFER_SIZE = 1024; public final static String REQUEST_URI_ATTRIBUTE = "javax.servlet.include.request_uri"; public final static String RESPONSE_WRAPPER = AcceleratorFilter.class.getName() + ".RESPONSE_WRAPPER"; @Autowired CacheControl cacheControl; - @Autowired(required=true) Integer buffer; - @Autowired(required=true) String eTag; - @Autowired(required=true) Boolean weak; - @Autowired(required=true) Long lastModified; - @Autowired(required=true) Integer cacheSeconds; + @Autowired(required=false) @Qualifier("defaultBufferSize") Integer defaultBufferSize = DEFAULT_BUFFER_SIZE; + @Autowired String eTag; + @Autowired Boolean weak; + @Autowired Long lastModified; + @Autowired Integer cacheSeconds; @Override @@ -58,6 +62,7 @@ public class AcceleratorFilter implements Filter { return; } + // TODO: Das macht so wahrscheinlich keinen Sinn... /** Prüfen, ob es sich um eine Anfrage für einen JSP-Include handelt */ if (request.getAttribute(REQUEST_URI_ATTRIBUTE) != null) { log.debug("Includes cannot be accelerated"); @@ -71,8 +76,7 @@ public class AcceleratorFilter implements Filter { httpRequest.setAttribute(RESPONSE_WRAPPER, wrapper); cacheControl.init(wrapper); chain.doFilter(request, wrapper); - /** Dekoration auslösen, falls sie bisher nicht ausgelöst wurde... */ - cacheControl.decorate(httpRequest, httpResponse, wrapper); + wrapper.finish(); } @Override @@ -84,18 +88,18 @@ public class AcceleratorFilter implements Filter { } - class AccelerationWrapper extends HttpServletResponseWrapper implements CacheMethodHandle { + class AccelerationWrapper implements HttpServletResponse, CacheMethodHandle { private final HttpServletRequest request; private final HttpServletResponse response; - boolean zipped; // CacheControll greift direkt auf dieses Flag zu! + private final AcceleratorServletOutputStream out; - private CountingServletOutputStream out; private ServletOutputStream stream; private PrintWriter writer; private boolean guessing = true; + protected boolean zipped = false; // << CacheControll greift direkt auf diese Variable zu! private long now; private int status; @@ -106,9 +110,17 @@ public class AcceleratorFilter implements Filter { private boolean weak; private Map cacheParams; + /** Für den AcceleratorOutputStream */ + private boolean committed = false; + private OutputStream os = null; + private int bufferSize; + private byte[] buffer; + private int pos = 0; + private int size = 0; + + AccelerationWrapper(HttpServletRequest request, HttpServletResponse response) throws IOException { - super(response); this.request = request; this.response = response; @@ -121,7 +133,6 @@ public class AcceleratorFilter implements Filter { weak = AcceleratorFilter.this.weak; cacheParams = new HashMap(); - zipped = false; Enumeration values = request.getHeaders(Headers.HEADER_ACCEPT_ENCODING); while (values.hasMoreElements()) { String value = (String) values.nextElement(); @@ -130,42 +141,33 @@ public class AcceleratorFilter implements Filter { break; } } - if (zipped) - out = new GZIPServletOutputStream(); - else - out = new WrappedServletOutputStream(); + + out = new AcceleratorServletOutputStream(); } + private void finish() throws IOException { + flushBuffer(); + out.close(); + } + @Override public void setStatus(int sc) { response.setStatus(sc); status = sc; - try { - cacheControl.decorate(request, response, this); - } - catch (Exception e) { - log.error("Error while decorating response", e); - } } @Override public void setStatus(int sc, String sm) { response.setStatus(sc,sm); status = sc; - try { - cacheControl.decorate(request, response, this); - } - catch (Exception e) { - log.error("Error while decorating response", e); - } } @Override public void addDateHeader(String name, long value) { if (!guessing) { - super.addDateHeader(name, value); + response.addDateHeader(name, value); return; } @@ -187,14 +189,14 @@ public class AcceleratorFilter implements Filter { } /** Unknown header: pass throug! */ - super.addDateHeader(name, value); + response.addDateHeader(name, value); } @Override public void addHeader(String name, String value) { if (!guessing) { - super.addHeader(name, value); + response.addHeader(name, value); return; } @@ -207,7 +209,7 @@ public class AcceleratorFilter implements Filter { public void addIntHeader(String name, int value) { if (!guessing) { - super.addIntHeader(name, value); + response.addIntHeader(name, value); return; } @@ -218,7 +220,7 @@ public class AcceleratorFilter implements Filter { public void setDateHeader(String name, long value) { if (!guessing) { - super.setDateHeader(name, value); + response.setDateHeader(name, value); return; } @@ -240,14 +242,14 @@ public class AcceleratorFilter implements Filter { } /** Unknown header: pass throug! */ - super.setDateHeader(name, value); + response.setDateHeader(name, value); } @Override public void setHeader(String name, String value) { if (!guessing) { - super.setHeader(name, value); + response.setHeader(name, value); return; } @@ -258,7 +260,7 @@ public class AcceleratorFilter implements Filter { public void setIntHeader(String name, int value) { if (!guessing) { - super.setIntHeader(name, value); + response.setIntHeader(name, value); return; } @@ -285,7 +287,7 @@ public class AcceleratorFilter implements Filter { throw new IllegalStateException("ServletOutputStream and PrintWriter cannot be requested both!"); if (writer == null) { - writer = new PrintWriter(out); + writer = new PrintWriter(new OutputStreamWriter(out, response.getCharacterEncoding())); } return writer; @@ -300,52 +302,140 @@ public class AcceleratorFilter implements Filter { } @Override - public void setBufferSize(int size) { - - out.setBuffer(size); - response.setBufferSize(size); + public int getBufferSize() { + return bufferSize; } @Override - public void flushBuffer() throws IOException { - - cacheControl.decorate(request, response, this); - response.flushBuffer(); + public void setBufferSize(int size) { + if (this.size > 0) + throw new IllegalStateException("cannot change buffer size, because content was already written!"); + bufferSize = size; + buffer = new byte[size]; } @Override public void resetBuffer() { - - response.resetBuffer(); + if (committed) + throw new IllegalStateException("cannot reset buffer, because response is already commited!"); + pos = 0; stream = null; writer = null; } @Override public void reset() { - + if (committed) + throw new IllegalStateException("cannot reset response, because response is already commited!"); + /** + * Da committed==false gilt, wurde die Dekoration noch nicht angestßen + * und muss entsprechend auch nicht rückgängig gemacht werden! + */ response.reset(); - try { - if (zipped) - out = new GZIPServletOutputStream(); - else - out = new WrappedServletOutputStream(); - } - catch (IOException e) { - throw new IllegalStateException(e); - } + pos = 0; stream = null; writer = null; + } + + @Override + public void flushBuffer() throws IOException { + if (writer != null) + writer.flush(); + else if (stream != null) + stream.flush(); + + out.flush(); + } + + @Override + public void addCookie(Cookie cookie) { + // TODO: Je nach Vary-Einstellung ETag anpassen? + response.addCookie(cookie); + } + + @Override + public boolean containsHeader(String name) { + return response.containsHeader(name); + } + + @Override + public String encodeURL(String url) { + return response.encodeURL(url); + } + + @Override + public String encodeRedirectURL(String url) { + return response.encodeRedirectURL(url); + } + + @Override + public String encodeUrl(String url) { + return response.encodeUrl(url); + } + + @Override + public String encodeRedirectUrl(String url) { + return response.encodeRedirectUrl(url); + } + + @Override + public void sendError(int sc, String msg) throws IOException { + response.sendError(sc,msg); + } + + @Override + public void sendError(int sc) throws IOException { + response.sendError(sc); + } + + @Override + public void sendRedirect(String location) throws IOException { + response.sendRedirect(location); + } + + @Override + public String getCharacterEncoding() { + return response.getCharacterEncoding(); + } + + @Override + public String getContentType() { + return response.getContentType(); + } + + @Override + public void setCharacterEncoding(String charset) { + // TODO: Je nach Vary-Einstellung ETag anpassen? + response.setCharacterEncoding(charset); + } - /** Cookies has been cleared! Reinitialize decorator... */ - cacheControl.init(this); + @Override + public void setContentType(String type) { + // TODO: Je nach Vary-Einstellung ETag anpassen? + response.setContentType(type); + } + + @Override + public boolean isCommitted() { + return committed; + } + + @Override + public void setLocale(Locale loc) { + // TODO: Je nach Vary-Einstellung ETag anpassen? + response.setLocale(loc); + } + + @Override + public Locale getLocale() { + return getLocale(); } @Override public boolean isZipped() { - return out.isZipped(); + return zipped; } @Override @@ -524,9 +614,9 @@ public class AcceleratorFilter implements Filter { /** Pass header through, if no value from intrest was found */ if (overwrite) - super.setHeader(name, value); + response.setHeader(name, value); else - super.addHeader(name, value); + response.addHeader(name, value); } private void calculateCacheSeconds() { @@ -537,130 +627,60 @@ public class AcceleratorFilter implements Filter { } - abstract class CountingServletOutputStream extends ServletOutputStream { - - abstract void setBuffer(int size) throws IllegalStateException; - abstract boolean isZipped(); - } - - - final class GZIPServletOutputStream extends CountingServletOutputStream { - - final static int MINMAL_BUFFER_SIZE = 128; - - - private final GZIPOutputStream out; - private int buffer, left; - private boolean empty; + private class AcceleratorServletOutputStream extends ServletOutputStream { + private final ServletOutputStream sos; - public GZIPServletOutputStream() throws IOException { - this.out = new GZIPOutputStream(response.getOutputStream()); - empty = true; - setBuffer(AcceleratorFilter.this.buffer); - left = buffer; - } - - - @Override - boolean isZipped() { - return !empty; - } - - @Override - void setBuffer(int size) { - if (!empty) - throw new IllegalStateException("attemp to change buffer size after writing data to response!"); - - if (size > MINMAL_BUFFER_SIZE) { - buffer = size; - left = buffer; - } - } - - - @Override - public void close() throws IOException { - try { - AcceleratorFilter.this.cacheControl.decorate(AccelerationWrapper.this.request, response, AccelerationWrapper.this); - } - catch (Exception e) { - log.error("Error while guessing Cache-Header's", e); - response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); - } - out.close(); + private AcceleratorServletOutputStream() throws IOException { + bufferSize = defaultBufferSize; + buffer = new byte[bufferSize]; + sos = AccelerationWrapper.this.response.getOutputStream(); } - @Override - public void flush() throws IOException { - try { - AcceleratorFilter.this.cacheControl.decorate(AccelerationWrapper.this.request, response, AccelerationWrapper.this); - } - catch (Exception e) { - log.error("Error while guessing Cache-Header's", e); - response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); - } - out.flush(); + private OutputStream out() throws IOException { + if (os == null) + os = zipped ? new GZIPOutputStream(sos) : sos; + return os; } @Override public void write(int i) throws IOException { - if (left == 0) { - try { - AcceleratorFilter.this.cacheControl.decorate(AccelerationWrapper.this.request, response, AccelerationWrapper.this); - } - catch (Exception e) { - log.error("Error while guessing Cache-Header's", e); - response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); - } + if (pos == bufferSize) { + out().write(buffer); + pos = 0; + committed = true; + cacheControl.decorate(request, response, this); } - empty = false; - left--; - out.write(i); + buffer[pos++] = (byte) i; + size++; } - } - - - final class WrappedServletOutputStream extends CountingServletOutputStream { - - private final ServletOutputStream out; - private boolean empty; - - - public WrappedServletOutputStream() throws IOException { - this.out = response.getOutputStream(); - empty = true; - } - @Override - boolean isZipped() { - return false; - } + public void flush() throws IOException { + if (pos == 0) + return; - @Override - void setBuffer(int size) { - if (!empty) - throw new IllegalStateException("attemp to change buffer size after writing data to response!"); + committed = true; + cacheControl.decorate(request, response, this); + out().write(buffer, 0, pos); + out().flush(); + pos = 0; } - @Override public void close() throws IOException { - out.close(); - } - - @Override - public void flush() throws IOException { - out.flush(); - } - - @Override - public void write(int i) throws IOException { - empty = false; - out.write(i); + if (size == 0) { + committed = true; + zipped = false; + cacheControl.decorate(request, response, this); + sos.close(); + } + else { + flush(); + out().close(); + } } } }