Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 363:b37d2737b342
added code for "not found" image
author | hertzhaft |
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date | Tue, 06 Dec 2005 18:53:17 +0100 |
parents | 12e3dd21c4cd |
children | 31643c12d939 |
rev | line source |
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181 | 1 /* |
2 * Scaler -- Scaler servlet main class | |
3 * | |
4 * Digital Image Library servlet components | |
5 * | |
303 | 6 * Copyright (C) 200-2004 Robert Casties (robcast@mail.berlios.de) |
181 | 7 * |
8 * This program is free software; you can redistribute it and/or modify it | |
9 * under the terms of the GNU General Public License as published by the Free | |
10 * Software Foundation; either version 2 of the License, or (at your option) | |
11 * any later version. | |
12 * | |
13 * Please read license.txt for the full details. A copy of the GPL may be found | |
14 * at http://www.gnu.org/copyleft/lgpl.html | |
15 * | |
16 * You should have received a copy of the GNU General Public License along with | |
17 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
18 * Place, Suite 330, Boston, MA 02111-1307 USA | |
19 * | |
20 */ | |
1 | 21 |
22 package digilib.servlet; | |
23 | |
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24 import java.awt.geom.AffineTransform; |
100 | 25 import java.awt.geom.NoninvertibleTransformException; |
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26 import java.awt.geom.Rectangle2D; |
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27 import java.io.File; |
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28 import java.io.IOException; |
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29 import java.util.List; |
1 | 30 |
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31 import javax.servlet.ServletConfig; |
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32 import javax.servlet.ServletContext; |
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33 import javax.servlet.ServletException; |
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34 import javax.servlet.http.HttpServlet; |
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35 import javax.servlet.http.HttpServletRequest; |
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36 import javax.servlet.http.HttpServletResponse; |
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37 |
181 | 38 import org.apache.log4j.Logger; |
39 | |
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40 import digilib.auth.AuthOpException; |
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41 import digilib.auth.AuthOps; |
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42 import digilib.image.ImageOpException; |
284 | 43 import digilib.image.ImageOps; |
149 | 44 import digilib.image.ImageSize; |
86 | 45 import digilib.io.DocuDirCache; |
335 | 46 import digilib.io.DocuDirectory; |
47 import digilib.io.DocuDirent; | |
181 | 48 import digilib.io.FileOpException; |
49 import digilib.io.FileOps; | |
161 | 50 import digilib.io.ImageFile; |
51 import digilib.io.ImageFileset; | |
1 | 52 |
73 | 53 /** |
181 | 54 * @author casties |
55 */ | |
348 | 56 // public class Scaler extends HttpServlet implements SingleThreadModel { |
1 | 57 public class Scaler extends HttpServlet { |
58 | |
263 | 59 private static final long serialVersionUID = -325080527268912852L; |
60 | |
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61 /** digilib servlet version (for all components) */ |
363 | 62 public static final String dlVersion = "1.5.9f"; |
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63 |
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64 /** logger for accounting requests */ |
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65 private static Logger accountlog = Logger.getLogger("account.request"); |
335 | 66 |
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67 /** gengeral logger for this class */ |
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68 private static Logger logger = Logger.getLogger("digilib.servlet"); |
335 | 69 |
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70 /** logger for authentication related */ |
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71 private static Logger authlog = Logger.getLogger("digilib.auth"); |
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72 |
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73 /** general error code */ |
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74 public static final int ERROR_UNKNOWN = 0; |
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75 |
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76 /** error code for authentication error */ |
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77 public static final int ERROR_AUTH = 1; |
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78 |
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79 /** error code for file operation error */ |
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80 public static final int ERROR_FILE = 2; |
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81 |
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82 /** error code for image operation error */ |
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83 public static final int ERROR_IMAGE = 3; |
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84 |
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85 /** DocuDirCache instance */ |
86 | 86 DocuDirCache dirCache; |
161 | 87 |
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88 /** authentication error image file */ |
153 | 89 File denyImgFile; |
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90 |
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91 /** image error image file */ |
153 | 92 File errorImgFile; |
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93 |
363 | 94 /** not found error image file */ |
95 File notfoundImgFile; | |
96 | |
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97 /** subsampling before scaling */ |
153 | 98 float minSubsample = 2f; |
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99 |
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100 /** send files as is? */ |
153 | 101 boolean sendFileAllowed = true; |
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102 |
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103 /** default scaling quality */ |
153 | 104 int defaultQuality = 1; |
1 | 105 |
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106 /** DigilibConfiguration instance */ |
73 | 107 DigilibConfiguration dlConfig; |
1 | 108 |
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109 /** use authorization database */ |
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110 boolean useAuthorization = true; |
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111 |
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112 /** AuthOps instance */ |
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113 AuthOps authOp; |
1 | 114 |
100 | 115 // EXPRIMENTAL |
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116 /** try to enlarge cropping area for "oblique" angles */ |
100 | 117 boolean wholeRotArea = false; |
118 | |
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119 /** |
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120 * Initialisation on first run. |
73 | 121 * |
122 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig) | |
123 */ | |
124 public void init(ServletConfig config) throws ServletException { | |
125 super.init(config); | |
1 | 126 |
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127 System.out |
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128 .println("***** Digital Image Library Image Scaler Servlet (version " |
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129 + dlVersion + ") *****"); |
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130 // say hello in the log file |
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131 logger |
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132 .info("***** Digital Image Library Image Scaler Servlet (version " |
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133 + dlVersion + ") *****"); |
1 | 134 |
73 | 135 // get our ServletContext |
136 ServletContext context = config.getServletContext(); | |
137 // see if there is a Configuration instance | |
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138 dlConfig = (DigilibConfiguration) context |
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139 .getAttribute("digilib.servlet.configuration"); |
73 | 140 if (dlConfig == null) { |
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141 // no Configuration |
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142 throw new ServletException("No Configuration!"); |
335 | 143 } |
73 | 144 // set our AuthOps |
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145 useAuthorization = dlConfig.getAsBoolean("use-authorization"); |
153 | 146 authOp = (AuthOps) dlConfig.getValue("servlet.auth.op"); |
181 | 147 |
86 | 148 // DocuDirCache instance |
153 | 149 dirCache = (DocuDirCache) dlConfig.getValue("servlet.dir.cache"); |
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150 denyImgFile = (File) dlConfig.getValue("denied-image"); |
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151 errorImgFile = (File) dlConfig.getValue("error-image"); |
363 | 152 notfoundImgFile = (File) dlConfig.getValue("notfound-image"); |
153 | 153 sendFileAllowed = dlConfig.getAsBoolean("sendfile-allowed"); |
154 minSubsample = dlConfig.getAsFloat("subsample-minimum"); | |
155 defaultQuality = dlConfig.getAsInt("default-quality"); | |
73 | 156 } |
1 | 157 |
181 | 158 /** Process the HTTP Get request */ |
73 | 159 public void doGet(HttpServletRequest request, HttpServletResponse response) |
335 | 160 throws ServletException, IOException { |
161 accountlog.info("GET from " + request.getRemoteAddr()); | |
73 | 162 // create new request with defaults |
163 DigilibRequest dlReq = new DigilibRequest(); | |
164 // set with request parameters | |
165 dlReq.setWithRequest(request); | |
166 // add DigilibRequest to ServletRequest | |
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167 request.setAttribute("digilib.servlet.request", dlReq); |
73 | 168 // do the processing |
169 processRequest(request, response); | |
170 } | |
1 | 171 |
181 | 172 /** Process the HTTP Post request */ |
298
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173 public void doPost(HttpServletRequest request, HttpServletResponse response) |
335 | 174 throws ServletException, IOException { |
175 accountlog.info("POST from " + request.getRemoteAddr()); | |
73 | 176 // create new request with defaults |
177 DigilibRequest dlReq = new DigilibRequest(); | |
178 // set with request parameters | |
179 dlReq.setWithRequest(request); | |
180 // add DigilibRequest to ServletRequest | |
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181 request.setAttribute("digilib.servlet.request", dlReq); |
73 | 182 // do the processing |
183 processRequest(request, response); | |
184 } | |
185 | |
335 | 186 /* |
187 * (non-Javadoc) | |
188 * | |
189 * @see javax.servlet.http.HttpServlet#getLastModified(javax.servlet.http.HttpServletRequest) | |
190 */ | |
191 protected long getLastModified(HttpServletRequest request) { | |
337 | 192 accountlog.debug("GetLastModified from " + request.getRemoteAddr() |
193 + " for " + request.getQueryString()); | |
335 | 194 long mtime = -1; |
195 // create new request with defaults | |
196 DigilibRequest dlReq = new DigilibRequest(); | |
197 // set with request parameters | |
198 dlReq.setWithRequest(request); | |
199 // find the requested file | |
200 DocuDirent f = findFile(dlReq); | |
201 if (f != null) { | |
202 DocuDirectory dd = (DocuDirectory) f.getParent(); | |
203 mtime = dd.getDirMTime() / 1000 * 1000; | |
204 } | |
205 return mtime; | |
206 } | |
207 | |
73 | 208 /** main request handler. */ |
348 | 209 void processRequest(HttpServletRequest request, HttpServletResponse response) |
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210 throws ServletException { |
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211 |
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212 if (dlConfig == null) { |
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213 throw new ServletException("ERROR: No Configuration!"); |
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214 } |
1 | 215 |
335 | 216 accountlog.debug("request: " + request.getQueryString()); |
217 logger.debug("request: " + request.getQueryString()); | |
218 | |
73 | 219 // time for benchmarking |
220 long startTime = System.currentTimeMillis(); | |
335 | 221 // output mime-type |
73 | 222 String mimeType = "image/png"; |
1 | 223 |
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224 /* parameters for a session */ |
1 | 225 |
73 | 226 // scale the image file to fit window size i.e. respect dw,dh |
227 boolean scaleToFit = true; | |
100 | 228 // scale the image by a fixed factor only |
229 boolean absoluteScale = false; | |
122 | 230 // only crop the image to fit |
231 boolean cropToFit = false; | |
149 | 232 // send the file as is |
233 boolean sendFile = false; | |
234 // use low resolution images only | |
235 boolean loresOnly = false; | |
236 // use hires images only | |
122 | 237 boolean hiresOnly = false; |
352 | 238 // send the image always as a specific type (e.g. JPEG or PNG) |
239 int forceType = ImageOps.TYPE_AUTO; | |
73 | 240 // interpolation to use for scaling |
153 | 241 int scaleQual = defaultQuality; |
73 | 242 // send html error message (or image file) |
243 boolean errorMsgHtml = false; | |
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244 // mirror the image |
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245 boolean doMirror = false; |
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246 // angle of mirror axis |
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247 float mirrorAngle = 0; |
130 | 248 // original (hires) image resolution |
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249 float origResX = 0; |
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250 float origResY = 0; |
1 | 251 |
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252 /* request parameters */ |
73 | 253 |
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254 DigilibRequest dlRequest = (DigilibRequest) request |
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255 .getAttribute("digilib.servlet.request"); |
1 | 256 |
73 | 257 // destination image width |
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258 int paramDW = dlRequest.getAsInt("dw"); |
73 | 259 // destination image height |
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260 int paramDH = dlRequest.getAsInt("dh"); |
73 | 261 // relative area x_offset (0..1) |
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262 float paramWX = dlRequest.getAsFloat("wx"); |
73 | 263 // relative area y_offset |
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264 float paramWY = dlRequest.getAsFloat("wy"); |
73 | 265 // relative area width (0..1) |
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266 float paramWW = dlRequest.getAsFloat("ww"); |
73 | 267 // relative area height |
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268 float paramWH = dlRequest.getAsFloat("wh"); |
73 | 269 // scale factor (additional to dw/width, dh/height) |
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270 float paramWS = dlRequest.getAsFloat("ws"); |
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271 // rotation angle |
298
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272 float paramROT = dlRequest.getAsFloat("rot"); |
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273 // contrast enhancement |
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274 float paramCONT = dlRequest.getAsFloat("cont"); |
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275 // brightness enhancement |
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276 float paramBRGT = dlRequest.getAsFloat("brgt"); |
86 | 277 // color modification |
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278 float[] paramRGBM = null; |
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279 Parameter p = dlRequest.get("rgbm"); |
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280 if (p.hasValue() && (!p.getAsString().equals("0/0/0"))) { |
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281 paramRGBM = p.parseAsFloatArray("/"); |
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282 } |
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283 float[] paramRGBA = null; |
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284 p = dlRequest.get("rgba"); |
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285 if (p.hasValue() && (!p.getAsString().equals("0/0/0"))) { |
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286 paramRGBA = p.parseAsFloatArray("/"); |
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287 } |
130 | 288 // destination resolution (DPI) |
170
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289 float paramDDPIX = dlRequest.getAsFloat("ddpix"); |
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290 float paramDDPIY = dlRequest.getAsFloat("ddpiy"); |
130 | 291 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
292 // if X or Y resolution isn't set, use DDPI | |
170
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293 paramDDPIX = dlRequest.getAsFloat("ddpi"); |
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294 paramDDPIY = paramDDPIX; |
130 | 295 } |
1 | 296 |
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297 /* |
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298 * operation mode: "fit": always fit to page, "clip": send original |
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299 * resolution cropped, "file": send whole file (if allowed) |
73 | 300 */ |
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301 if (dlRequest.hasOption("mo", "clip")) { |
73 | 302 scaleToFit = false; |
100 | 303 absoluteScale = false; |
73 | 304 cropToFit = true; |
149 | 305 sendFile = false; |
306 hiresOnly = true; | |
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307 } else if (dlRequest.hasOption("mo", "fit")) { |
73 | 308 scaleToFit = true; |
100 | 309 absoluteScale = false; |
122 | 310 cropToFit = false; |
149 | 311 sendFile = false; |
312 hiresOnly = false; | |
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313 } else if (dlRequest.hasOption("mo", "osize")) { |
100 | 314 scaleToFit = false; |
315 absoluteScale = true; | |
122 | 316 cropToFit = false; |
149 | 317 sendFile = false; |
122 | 318 hiresOnly = true; |
73 | 319 } |
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320 // operation mode: "lores": try to use scaled image, "hires": use |
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321 // unscaled image |
348 | 322 // "autores": try best fitting resolution |
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323 if (dlRequest.hasOption("mo", "lores")) { |
149 | 324 loresOnly = true; |
325 hiresOnly = false; | |
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326 } else if (dlRequest.hasOption("mo", "hires")) { |
149 | 327 loresOnly = false; |
328 hiresOnly = true; | |
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329 } else if (dlRequest.hasOption("mo", "autores")) { |
149 | 330 loresOnly = false; |
331 hiresOnly = false; | |
332 } | |
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333 // operation mode: "errtxt": error message in html, "errimg": error |
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334 // image |
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335 if (dlRequest.hasOption("mo", "errtxt")) { |
73 | 336 errorMsgHtml = true; |
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337 } else if (dlRequest.hasOption("mo", "errimg")) { |
73 | 338 errorMsgHtml = false; |
339 } | |
340 // operation mode: "q0" - "q2": interpolation quality | |
170
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341 if (dlRequest.hasOption("mo", "q0")) { |
73 | 342 scaleQual = 0; |
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343 } else if (dlRequest.hasOption("mo", "q1")) { |
73 | 344 scaleQual = 1; |
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345 } else if (dlRequest.hasOption("mo", "q2")) { |
73 | 346 scaleQual = 2; |
347 } | |
303 | 348 // operation mode: "jpg": always use JPEG |
349 if (dlRequest.hasOption("mo", "jpg")) { | |
352 | 350 forceType = ImageOps.TYPE_JPEG; |
351 } | |
352 // operation mode: "png": always use PNG | |
353 if (dlRequest.hasOption("mo", "png")) { | |
354 forceType = ImageOps.TYPE_PNG; | |
335 | 355 } |
1 | 356 |
185 | 357 // check with the maximum allowed size (if set) |
358 int maxImgSize = dlConfig.getAsInt("max-image-size"); | |
359 if (maxImgSize > 0) { | |
298
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360 paramDW = (paramDW * paramWS > maxImgSize) ? (int) (maxImgSize / paramWS) |
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361 : paramDW; |
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362 paramDH = (paramDH * paramWS > maxImgSize) ? (int) (maxImgSize / paramWS) |
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363 : paramDH; |
185 | 364 } |
335 | 365 |
348 | 366 // "big" try for all file/image actions |
73 | 367 try { |
368 | |
161 | 369 // ImageFileset of the image to load |
370 ImageFileset fileset = null; | |
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371 |
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372 /* find the file to load/send */ |
1 | 373 |
73 | 374 // get PathInfo |
375 String loadPathName = dlRequest.getFilePath(); | |
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376 |
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377 /* check permissions */ |
298
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378 if (useAuthorization) { |
73 | 379 // get a list of required roles (empty if no restrictions) |
380 List rolesRequired = authOp.rolesForPath(loadPathName, request); | |
381 if (rolesRequired != null) { | |
298
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382 authlog.debug("Role required: " + rolesRequired); |
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383 authlog.debug("User: " + request.getRemoteUser()); |
73 | 384 // is the current request/user authorized? |
385 if (!authOp.isRoleAuthorized(rolesRequired, request)) { | |
386 // send deny answer and abort | |
298
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387 throw new AuthOpException(); |
73 | 388 } |
389 } | |
335 | 390 } |
1 | 391 |
335 | 392 // find the file |
393 fileset = (ImageFileset) findFile(dlRequest); | |
94 | 394 if (fileset == null) { |
298
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395 throw new FileOpException("File " + loadPathName + "(" |
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396 + dlRequest.getAsInt("pn") + ") not found."); |
94 | 397 } |
181 | 398 |
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399 /* calculate expected source image size */ |
149 | 400 ImageSize expectedSourceSize = new ImageSize(); |
122 | 401 if (scaleToFit) { |
298
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402 float scale = (1 / Math.min(paramWW, paramWH)) * paramWS; |
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403 expectedSourceSize.setSize((int) (paramDW * scale), |
335 | 404 (int) (paramDH * scale)); |
122 | 405 } else { |
298
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406 expectedSourceSize.setSize((int) (paramDW * paramWS), |
335 | 407 (int) (paramDH * paramWS)); |
100 | 408 } |
409 | |
335 | 410 ImageFile fileToLoad; |
170
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411 /* select a resolution */ |
149 | 412 if (hiresOnly) { |
413 // get first element (= highest resolution) | |
170
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414 fileToLoad = fileset.getBiggest(); |
149 | 415 } else if (loresOnly) { |
416 // enforced lores uses next smaller resolution | |
298
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417 fileToLoad = fileset.getNextSmaller(expectedSourceSize); |
149 | 418 if (fileToLoad == null) { |
419 // this is the smallest we have | |
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420 fileToLoad = fileset.getSmallest(); |
149 | 421 } |
422 } else { | |
130 | 423 // autores: use next higher resolution |
298
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424 fileToLoad = fileset.getNextBigger(expectedSourceSize); |
122 | 425 if (fileToLoad == null) { |
130 | 426 // this is the highest we have |
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427 fileToLoad = fileset.getBiggest(); |
122 | 428 } |
86 | 429 } |
298
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430 logger.info("Planning to load: " + fileToLoad.getFile()); |
73 | 431 |
181 | 432 /* |
433 * send the image if its mo=(raw)file | |
434 */ | |
435 if (dlRequest.hasOption("mo", "file") | |
335 | 436 || dlRequest.hasOption("mo", "rawfile")) { |
181 | 437 if (sendFileAllowed) { |
438 String mt = null; | |
439 if (dlRequest.hasOption("mo", "rawfile")) { | |
440 mt = "application/octet-stream"; | |
441 } | |
263 | 442 logger.debug("Sending RAW File as is."); |
181 | 443 ServletOps.sendFile(fileToLoad.getFile(), mt, response); |
263 | 444 logger.info("Done in " |
298
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445 + (System.currentTimeMillis() - startTime) + "ms"); |
263 | 446 return; |
181 | 447 } |
448 } | |
449 | |
86 | 450 // check the source image |
122 | 451 if (!fileToLoad.isChecked()) { |
284 | 452 ImageOps.checkFile(fileToLoad); |
122 | 453 } |
86 | 454 // get the source image type |
455 mimeType = fileToLoad.getMimetype(); | |
149 | 456 // get the source image size |
457 ImageSize imgSize = fileToLoad.getSize(); | |
458 | |
130 | 459 // decide if the image can be sent as is |
298
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460 boolean mimetypeSendable = mimeType.equals("image/jpeg") |
122 | 461 || mimeType.equals("image/png") |
462 || mimeType.equals("image/gif"); | |
298
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463 boolean imagoOptions = dlRequest.hasOption("mo", "hmir") |
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464 || dlRequest.hasOption("mo", "vmir") || (paramROT != 0) |
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465 || (paramRGBM != null) || (paramRGBA != null) |
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466 || (paramCONT != 0) || (paramBRGT != 0); |
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467 boolean imageSendable = mimetypeSendable && !imagoOptions; |
73 | 468 |
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469 /* |
298
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470 * if not autoRes and image smaller than requested size then send as |
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471 * is. if autoRes and image has requested size then send as is. if |
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472 * not autoScale and not scaleToFit nor cropToFit then send as is |
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473 * (mo=file) |
73 | 474 */ |
181 | 475 if (imageSendable |
298
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476 && ((loresOnly && fileToLoad.getSize().isSmallerThan( |
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477 expectedSourceSize)) || (!(loresOnly || hiresOnly) && fileToLoad |
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478 .getSize().fitsIn(expectedSourceSize)))) { |
73 | 479 |
181 | 480 logger.debug("Sending File as is."); |
1 | 481 |
181 | 482 ServletOps.sendFile(fileToLoad.getFile(), null, response); |
483 | |
484 logger.info("Done in " | |
298
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485 + (System.currentTimeMillis() - startTime) + "ms"); |
73 | 486 return; |
487 } | |
1 | 488 |
348 | 489 |
490 /* | |
491 * stop here if we're overloaded... | |
492 * | |
493 * 503 Service Unavailable | |
494 * The server is currently unable to | |
495 * handle the request due to a temporary overloading or maintenance | |
496 * of the server. The implication is that this is a temporary | |
497 * condition which will be alleviated after some delay. If known, | |
498 * the length of the delay MAY be indicated in a Retry-After header. | |
499 * If no Retry-After is given, the client SHOULD handle the response | |
500 * as it would for a 500 response. Note: The existence of the 503 | |
501 * status code does not imply that a server must use it when | |
502 * becoming overloaded. Some servers may wish to simply refuse the | |
503 * connection. | |
504 * (RFC2616 HTTP1.1) | |
505 */ | |
506 if (! DigilibWorker.canRun()) { | |
507 logger.error("Servlet overloaded!"); | |
508 response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE); | |
509 return; | |
510 } | |
511 | |
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512 // set missing dw or dh from aspect ratio |
298
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513 float imgAspect = fileToLoad.getAspect(); |
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514 if (paramDW == 0) { |
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515 paramDW = (int) Math.round(paramDH * imgAspect); |
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516 } else if (paramDH == 0) { |
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517 paramDH = (int) Math.round(paramDW / imgAspect); |
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518 } |
149 | 519 |
335 | 520 /* |
521 * prepare resolution for original size | |
522 */ | |
523 if (absoluteScale) { | |
524 // get original resolution from metadata | |
525 fileset.checkMeta(); | |
526 origResX = fileset.getResX(); | |
527 origResY = fileset.getResY(); | |
528 if ((origResX == 0) || (origResY == 0)) { | |
529 throw new ImageOpException("Missing image DPI information!"); | |
530 } | |
531 | |
532 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { | |
533 throw new ImageOpException( | |
534 "Missing display DPI information!"); | |
535 } | |
536 } | |
537 | |
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538 /* crop and scale the image */ |
1 | 539 |
298
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540 logger.debug("IMG: " + imgSize.getWidth() + "x" |
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541 + imgSize.getHeight()); |
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542 logger.debug("time " + (System.currentTimeMillis() - startTime) |
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543 + "ms"); |
1 | 544 |
73 | 545 // coordinates and scaling |
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546 float areaXoff; |
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547 float areaYoff; |
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548 float areaWidth; |
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549 float areaHeight; |
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550 float scaleX; |
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551 float scaleY; |
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552 float scaleXY; |
1 | 553 |
100 | 554 // coordinates using Java2D |
555 // image size in pixels | |
298
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556 Rectangle2D imgBounds = new Rectangle2D.Float(0, 0, imgSize |
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557 .getWidth(), imgSize.getHeight()); |
100 | 558 // user window area in [0,1] coordinates |
298
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559 Rectangle2D relUserArea = new Rectangle2D.Float(paramWX, paramWY, |
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560 paramWW, paramWH); |
100 | 561 // transform from relative [0,1] to image coordinates. |
298
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562 AffineTransform imgTrafo = AffineTransform.getScaleInstance(imgSize |
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563 .getWidth(), imgSize.getHeight()); |
85 | 564 // transform user coordinate area to image coordinate area |
298
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565 Rectangle2D userImgArea = imgTrafo.createTransformedShape( |
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566 relUserArea).getBounds2D(); |
100 | 567 |
568 // calculate scaling factors based on inner user area | |
73 | 569 if (scaleToFit) { |
298
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570 areaWidth = (float) userImgArea.getWidth(); |
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571 areaHeight = (float) userImgArea.getHeight(); |
73 | 572 scaleX = paramDW / areaWidth * paramWS; |
573 scaleY = paramDH / areaHeight * paramWS; | |
574 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
100 | 575 } else if (absoluteScale) { |
576 // absolute scale | |
130 | 577 scaleX = paramDDPIX / origResX; |
578 scaleY = paramDDPIY / origResY; | |
579 // currently only same scale :-( | |
580 scaleXY = scaleX; | |
581 areaWidth = paramDW / scaleXY * paramWS; | |
582 areaHeight = paramDH / scaleXY * paramWS; | |
100 | 583 // reset user area size |
298
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584 userImgArea.setRect(userImgArea.getX(), userImgArea.getY(), |
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585 areaWidth, areaHeight); |
73 | 586 } else { |
587 // crop to fit | |
85 | 588 areaWidth = paramDW * paramWS; |
589 areaHeight = paramDH * paramWS; | |
100 | 590 // reset user area size |
298
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591 userImgArea.setRect(userImgArea.getX(), userImgArea.getY(), |
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592 areaWidth, areaHeight); |
73 | 593 scaleX = 1f; |
594 scaleY = 1f; | |
595 scaleXY = 1f; | |
100 | 596 } |
85 | 597 |
100 | 598 // enlarge image area for rotations to cover additional pixels |
599 Rectangle2D outerUserImgArea = userImgArea; | |
600 Rectangle2D innerUserImgArea = userImgArea; | |
601 if (wholeRotArea) { | |
602 if (paramROT != 0) { | |
603 try { | |
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604 // rotate user area coordinates around center of user |
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605 // area |
298
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606 AffineTransform rotTrafo = AffineTransform |
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607 .getRotateInstance(Math.toRadians(paramROT), |
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608 userImgArea.getCenterX(), userImgArea |
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609 .getCenterY()); |
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610 // get bounds from rotated end position |
298
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611 innerUserImgArea = rotTrafo.createTransformedShape( |
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612 userImgArea).getBounds2D(); |
100 | 613 // get bounds from back-rotated bounds |
298
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614 outerUserImgArea = rotTrafo.createInverse() |
100 | 615 .createTransformedShape(innerUserImgArea) |
616 .getBounds2D(); | |
617 } catch (NoninvertibleTransformException e1) { | |
618 // this shouldn't happen anyway | |
298
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619 logger.error(e1); |
100 | 620 } |
621 } | |
73 | 622 } |
1 | 623 |
298
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624 logger.debug("Scale " + scaleXY + "(" + scaleX + "," + scaleY |
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625 + ") on " + outerUserImgArea); |
1 | 626 |
73 | 627 // clip area at the image border |
100 | 628 outerUserImgArea = outerUserImgArea.createIntersection(imgBounds); |
85 | 629 |
73 | 630 // check image parameters sanity |
298
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631 if ((outerUserImgArea.getWidth() < 1) |
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632 || (outerUserImgArea.getHeight() < 1) |
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633 || (scaleXY * outerUserImgArea.getWidth() < 2) |
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634 || (scaleXY * outerUserImgArea.getHeight() < 2)) { |
181 | 635 logger.error("ERROR: invalid scale parameter set!"); |
73 | 636 throw new ImageOpException("Invalid scale parameter set!"); |
637 } | |
1 | 638 |
298
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639 /* |
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640 * submit the image worker job |
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641 */ |
85 | 642 |
298
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643 DigilibWorker job = new DigilibImageWorker(dlConfig, response, |
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644 mimeType, scaleQual, dlRequest, paramROT, paramCONT, |
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645 paramBRGT, paramRGBM, paramRGBA, fileToLoad, scaleXY, |
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646 outerUserImgArea, innerUserImgArea, minSubsample, |
352 | 647 wholeRotArea, forceType); |
85 | 648 |
298
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649 job.run(); |
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650 if (job.hasError()) { |
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651 throw new ImageOpException(job.getError().toString()); |
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652 } |
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653 |
298
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654 logger.debug("servlet done in " |
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655 + (System.currentTimeMillis() - startTime)); |
73 | 656 |
170
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657 /* error handling */ |
1 | 658 |
73 | 659 } // end of "big" try |
156 | 660 catch (IOException e) { |
298
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661 logger.error("ERROR: File IO Error: " + e); |
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662 digilibError(errorMsgHtml, ERROR_FILE, |
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663 "ERROR: File IO Error: " + e, response); |
73 | 664 } catch (AuthOpException e) { |
298
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665 logger.error("ERROR: Authorization error: " + e); |
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666 digilibError(errorMsgHtml, ERROR_AUTH, |
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667 "ERROR: Authorization error: " + e, response); |
73 | 668 } catch (ImageOpException e) { |
298
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669 logger.error("ERROR: Image Error: " + e); |
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670 digilibError(errorMsgHtml, ERROR_IMAGE, |
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671 "ERROR: Image Operation Error: " + e, response); |
73 | 672 } catch (RuntimeException e) { |
673 // JAI likes to throw RuntimeExceptions ;-( | |
298
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674 logger.error("ERROR: Other Image Error: " + e); |
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675 digilibError(errorMsgHtml, ERROR_IMAGE, |
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676 "ERROR: Other Image Operation Error: " + e, response); |
73 | 677 } |
678 } | |
298
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679 /** |
335 | 680 * Returns the DocuDirent corresponding to the DigilibRequest. |
681 * | |
682 * @param dlRequest | |
683 * @return | |
684 */ | |
685 public DocuDirent findFile(DigilibRequest dlRequest) { | |
686 // find the file(set) | |
687 DocuDirent f = dirCache.getFile(dlRequest.getFilePath(), dlRequest | |
688 .getAsInt("pn"), FileOps.CLASS_IMAGE); | |
689 return f; | |
690 } | |
691 | |
692 /** | |
298
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693 * Sends an error to the client as text or image. |
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694 * |
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695 * @param asHTML |
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696 * @param type |
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697 * @param msg |
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698 * @param response |
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699 */ |
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700 public void digilibError(boolean asHTML, int type, String msg, |
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701 HttpServletResponse response) { |
335 | 702 try { |
298
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703 File img = null; |
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704 if (type == ERROR_AUTH) { |
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705 if (msg == null) { |
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706 msg = "ERROR: Unauthorized access!"; |
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707 } |
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708 img = denyImgFile; |
363 | 709 } else if (type == ERROR_FILE) { |
710 if (msg == null) { | |
711 msg = "ERROR: Image file not found!"; | |
712 } | |
713 img = notfoundImgFile; | |
335 | 714 } else { |
298
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715 if (msg == null) { |
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716 msg = "ERROR: Other image error!"; |
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717 } |
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718 img = this.errorImgFile; |
335 | 719 } |
298
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720 if (asHTML && (img != null)) { |
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721 ServletOps.htmlMessage(msg, response); |
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722 } else { |
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723 ServletOps.sendFile(img, null, response); |
335 | 724 } |
298
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725 } catch (IOException e) { |
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726 logger.error("Error sending error!", e); |
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727 } |
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728 |
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729 } |
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730 |
348 | 731 } // Scaler class |