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17 package org.apache.logging.log4j.core.layout;
18
19 import java.io.IOException;
20 import java.io.InterruptedIOException;
21 import java.io.LineNumberReader;
22 import java.io.PrintWriter;
23 import java.io.StringReader;
24 import java.io.StringWriter;
25 import java.lang.management.ManagementFactory;
26 import java.nio.charset.Charset;
27 import java.util.ArrayList;
28 import java.util.HashMap;
29 import java.util.Map;
30
31 import org.apache.logging.log4j.Level;
32 import org.apache.logging.log4j.core.LogEvent;
33 import org.apache.logging.log4j.core.config.plugins.Plugin;
34 import org.apache.logging.log4j.core.config.plugins.PluginAttr;
35 import org.apache.logging.log4j.core.config.plugins.PluginFactory;
36 import org.apache.logging.log4j.core.helpers.Charsets;
37 import org.apache.logging.log4j.core.helpers.Constants;
38 import org.apache.logging.log4j.core.helpers.Transform;
39
40
41
42
43
44
45
46 @Plugin(name = "HTMLLayout", category = "Core", elementType = "layout", printObject = true)
47 public final class HTMLLayout extends AbstractStringLayout {
48
49 private static final int BUF_SIZE = 256;
50
51 private static final String TRACE_PREFIX = "<br /> ";
52
53 private static final String REGEXP = Constants.LINE_SEP.equals("\n") ? "\n" : Constants.LINE_SEP + "|\n";
54
55 private static final String DEFAULT_TITLE = "Log4j Log Messages";
56
57 private static final String DEFAULT_CONTENT_TYPE = "text/html";
58
59 private final long jvmStartTime = ManagementFactory.getRuntimeMXBean().getStartTime();
60
61
62 private final boolean locationInfo;
63
64 private final String title;
65
66 private final String contentType;
67
68
69 private enum FontSize {
70 SMALLER("smaller"), XXSMALL("xx-small"), XSMALL("x-small"), SMALL("small"), MEDIUM("medium"), LARGE("large"),
71 XLARGE("x-large"), XXLARGE("xx-large"), LARGER("larger");
72
73 private final String size;
74
75 private FontSize(final String size) {
76 this.size = size;
77 }
78
79 public String getFontSize() {
80 return size;
81 }
82
83 public static FontSize getFontSize(final String size) {
84 for (final FontSize fontSize : values()) {
85 if (fontSize.size.equals(size)) {
86 return fontSize;
87 }
88 }
89 return SMALL;
90 }
91
92 public FontSize larger() {
93 return this.ordinal() < XXLARGE.ordinal() ? FontSize.values()[this.ordinal() + 1] : this;
94 }
95 }
96
97 private final String font;
98 private final String fontSize;
99 private final String headerSize;
100
101 private HTMLLayout(final boolean locationInfo, final String title, final String contentType, final Charset charset,
102 final String font, final String fontSize, final String headerSize) {
103 super(charset);
104 this.locationInfo = locationInfo;
105 this.title = title;
106 this.contentType = contentType;
107 this.font = font;
108 this.fontSize = fontSize;
109 this.headerSize = headerSize;
110 }
111
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117
118 @Override
119 public String toSerializable(final LogEvent event) {
120 final StringBuilder sbuf = new StringBuilder(BUF_SIZE);
121
122 sbuf.append(Constants.LINE_SEP).append("<tr>").append(Constants.LINE_SEP);
123
124 sbuf.append("<td>");
125 sbuf.append(event.getMillis() - jvmStartTime);
126 sbuf.append("</td>").append(Constants.LINE_SEP);
127
128 final String escapedThread = Transform.escapeTags(event.getThreadName());
129 sbuf.append("<td title=\"").append(escapedThread).append(" thread\">");
130 sbuf.append(escapedThread);
131 sbuf.append("</td>").append(Constants.LINE_SEP);
132
133 sbuf.append("<td title=\"Level\">");
134 if (event.getLevel().equals(Level.DEBUG)) {
135 sbuf.append("<font color=\"#339933\">");
136 sbuf.append(Transform.escapeTags(String.valueOf(event.getLevel())));
137 sbuf.append("</font>");
138 } else if (event.getLevel().isAtLeastAsSpecificAs(Level.WARN)) {
139 sbuf.append("<font color=\"#993300\"><strong>");
140 sbuf.append(Transform.escapeTags(String.valueOf(event.getLevel())));
141 sbuf.append("</strong></font>");
142 } else {
143 sbuf.append(Transform.escapeTags(String.valueOf(event.getLevel())));
144 }
145 sbuf.append("</td>").append(Constants.LINE_SEP);
146
147 String escapedLogger = Transform.escapeTags(event.getLoggerName());
148 if (escapedLogger.length() == 0) {
149 escapedLogger = "root";
150 }
151 sbuf.append("<td title=\"").append(escapedLogger).append(" logger\">");
152 sbuf.append(escapedLogger);
153 sbuf.append("</td>").append(Constants.LINE_SEP);
154
155 if (locationInfo) {
156 final StackTraceElement element = event.getSource();
157 sbuf.append("<td>");
158 sbuf.append(Transform.escapeTags(element.getFileName()));
159 sbuf.append(':');
160 sbuf.append(element.getLineNumber());
161 sbuf.append("</td>").append(Constants.LINE_SEP);
162 }
163
164 sbuf.append("<td title=\"Message\">");
165 sbuf.append(Transform.escapeTags(event.getMessage().getFormattedMessage()).replaceAll(REGEXP, "<br />"));
166 sbuf.append("</td>").append(Constants.LINE_SEP);
167 sbuf.append("</tr>").append(Constants.LINE_SEP);
168
169 if (event.getContextStack().getDepth() > 0) {
170 sbuf.append("<tr><td bgcolor=\"#EEEEEE\" style=\"font-size : ").append(fontSize);
171 sbuf.append(";\" colspan=\"6\" ");
172 sbuf.append("title=\"Nested Diagnostic Context\">");
173 sbuf.append("NDC: ").append(Transform.escapeTags(event.getContextStack().toString()));
174 sbuf.append("</td></tr>").append(Constants.LINE_SEP);
175 }
176
177 if (event.getContextMap().size() > 0) {
178 sbuf.append("<tr><td bgcolor=\"#EEEEEE\" style=\"font-size : ").append(fontSize);
179 sbuf.append(";\" colspan=\"6\" ");
180 sbuf.append("title=\"Mapped Diagnostic Context\">");
181 sbuf.append("MDC: ").append(Transform.escapeTags(event.getContextMap().toString()));
182 sbuf.append("</td></tr>").append(Constants.LINE_SEP);
183 }
184
185 final Throwable throwable = event.getThrown();
186 if (throwable != null) {
187 sbuf.append("<tr><td bgcolor=\"#993300\" style=\"color:White; font-size : ").append(fontSize);
188 sbuf.append(";\" colspan=\"6\">");
189 appendThrowableAsHTML(throwable, sbuf);
190 sbuf.append("</td></tr>").append(Constants.LINE_SEP);
191 }
192
193 return sbuf.toString();
194 }
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200
201 @Override
202 public Map<String, String> getContentFormat() {
203 return new HashMap<String, String>();
204 }
205
206 @Override
207
208
209
210 public String getContentType() {
211 return "text/html; charset=" + this.getCharset();
212 }
213
214 private void appendThrowableAsHTML(final Throwable throwable, final StringBuilder sbuf) {
215 final StringWriter sw = new StringWriter();
216 final PrintWriter pw = new PrintWriter(sw);
217 try {
218 throwable.printStackTrace(pw);
219 } catch (final RuntimeException ex) {
220
221 }
222 pw.flush();
223 final LineNumberReader reader = new LineNumberReader(new StringReader(sw.toString()));
224 final ArrayList<String> lines = new ArrayList<String>();
225 try {
226 String line = reader.readLine();
227 while (line != null) {
228 lines.add(line);
229 line = reader.readLine();
230 }
231 } catch (final IOException ex) {
232 if (ex instanceof InterruptedIOException) {
233 Thread.currentThread().interrupt();
234 }
235 lines.add(ex.toString());
236 }
237 boolean first = true;
238 for (final String line : lines) {
239 if (!first) {
240 sbuf.append(TRACE_PREFIX);
241 } else {
242 first = false;
243 }
244 sbuf.append(Transform.escapeTags(line));
245 sbuf.append(Constants.LINE_SEP);
246 }
247 }
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253 @Override
254 public byte[] getHeader() {
255 final StringBuilder sbuf = new StringBuilder();
256 sbuf.append("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" ");
257 sbuf.append("\"http://www.w3.org/TR/html4/loose.dtd\">");
258 sbuf.append(Constants.LINE_SEP);
259 sbuf.append("<html>").append(Constants.LINE_SEP);
260 sbuf.append("<head>").append(Constants.LINE_SEP);
261 sbuf.append("<meta charset=\"").append(getCharset()).append("\"/>").append(Constants.LINE_SEP);
262 sbuf.append("<title>").append(title).append("</title>").append(Constants.LINE_SEP);
263 sbuf.append("<style type=\"text/css\">").append(Constants.LINE_SEP);
264 sbuf.append("<!--").append(Constants.LINE_SEP);
265 sbuf.append("body, table {font-family:").append(font).append("; font-size: ");
266 sbuf.append(headerSize).append(";}").append(Constants.LINE_SEP);
267 sbuf.append("th {background: #336699; color: #FFFFFF; text-align: left;}").append(Constants.LINE_SEP);
268 sbuf.append("-->").append(Constants.LINE_SEP);
269 sbuf.append("</style>").append(Constants.LINE_SEP);
270 sbuf.append("</head>").append(Constants.LINE_SEP);
271 sbuf.append("<body bgcolor=\"#FFFFFF\" topmargin=\"6\" leftmargin=\"6\">").append(Constants.LINE_SEP);
272 sbuf.append("<hr size=\"1\" noshade>").append(Constants.LINE_SEP);
273 sbuf.append("Log session start time " + new java.util.Date() + "<br>").append(Constants.LINE_SEP);
274 sbuf.append("<br>").append(Constants.LINE_SEP);
275 sbuf.append(
276 "<table cellspacing=\"0\" cellpadding=\"4\" border=\"1\" bordercolor=\"#224466\" width=\"100%\">");
277 sbuf.append(Constants.LINE_SEP);
278 sbuf.append("<tr>").append(Constants.LINE_SEP);
279 sbuf.append("<th>Time</th>").append(Constants.LINE_SEP);
280 sbuf.append("<th>Thread</th>").append(Constants.LINE_SEP);
281 sbuf.append("<th>Level</th>").append(Constants.LINE_SEP);
282 sbuf.append("<th>Logger</th>").append(Constants.LINE_SEP);
283 if (locationInfo) {
284 sbuf.append("<th>File:Line</th>").append(Constants.LINE_SEP);
285 }
286 sbuf.append("<th>Message</th>").append(Constants.LINE_SEP);
287 sbuf.append("</tr>").append(Constants.LINE_SEP);
288 return sbuf.toString().getBytes(getCharset());
289 }
290
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294
295 @Override
296 public byte[] getFooter() {
297 final StringBuilder sbuf = new StringBuilder();
298 sbuf.append("</table>").append(Constants.LINE_SEP);
299 sbuf.append("<br>").append(Constants.LINE_SEP);
300 sbuf.append("</body></html>");
301 return sbuf.toString().getBytes(getCharset());
302 }
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314 @PluginFactory
315 public static HTMLLayout createLayout(@PluginAttr("locationInfo") final String locationInfo,
316 @PluginAttr("title") String title,
317 @PluginAttr("contentType") String contentType,
318 @PluginAttr("charset") final String charsetName,
319 @PluginAttr("fontSize") String fontSize,
320 @PluginAttr("fontName") String font) {
321 final Charset charset = Charsets.getSupportedCharset(charsetName, Charsets.UTF_8);
322 if (font == null) {
323 font = "arial,sans-serif";
324 }
325 final FontSize fs = FontSize.getFontSize(fontSize);
326 fontSize = fs.getFontSize();
327 final String headerSize = fs.larger().getFontSize();
328 final boolean info = locationInfo == null ? false : Boolean.valueOf(locationInfo);
329 if (title == null) {
330 title = DEFAULT_TITLE;
331 }
332 if (contentType == null) {
333 contentType = DEFAULT_CONTENT_TYPE;
334 }
335 return new HTMLLayout(info, title, contentType, charset, font, fontSize, headerSize);
336 }
337 }