Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 352:5ded9e06cd57
Servlet version 1.5.9b
- added mo=png option to enforce PNG output
- set higher JPEG quality for mo=q2 (only ImageLoaderDocuImage)
author | robcast |
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date | Wed, 14 Sep 2005 21:59:07 +0200 |
parents | 269d1028dfb7 |
children | 25095f85ba7c |
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) */ |
352 | 62 public static final String dlVersion = "1.5.9b"; |
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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 |
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94 /** subsampling before scaling */ |
153 | 95 float minSubsample = 2f; |
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96 |
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97 /** send files as is? */ |
153 | 98 boolean sendFileAllowed = true; |
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99 |
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100 /** default scaling quality */ |
153 | 101 int defaultQuality = 1; |
1 | 102 |
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103 /** DigilibConfiguration instance */ |
73 | 104 DigilibConfiguration dlConfig; |
1 | 105 |
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106 /** use authorization database */ |
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107 boolean useAuthorization = true; |
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108 |
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109 /** AuthOps instance */ |
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110 AuthOps authOp; |
1 | 111 |
100 | 112 // EXPRIMENTAL |
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113 /** try to enlarge cropping area for "oblique" angles */ |
100 | 114 boolean wholeRotArea = false; |
115 | |
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116 /** |
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117 * Initialisation on first run. |
73 | 118 * |
119 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig) | |
120 */ | |
121 public void init(ServletConfig config) throws ServletException { | |
122 super.init(config); | |
1 | 123 |
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124 System.out |
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125 .println("***** Digital Image Library Image Scaler Servlet (version " |
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126 + dlVersion + ") *****"); |
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127 // say hello in the log file |
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128 logger |
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129 .info("***** Digital Image Library Image Scaler Servlet (version " |
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130 + dlVersion + ") *****"); |
1 | 131 |
73 | 132 // get our ServletContext |
133 ServletContext context = config.getServletContext(); | |
134 // see if there is a Configuration instance | |
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135 dlConfig = (DigilibConfiguration) context |
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136 .getAttribute("digilib.servlet.configuration"); |
73 | 137 if (dlConfig == null) { |
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138 // no Configuration |
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139 throw new ServletException("No Configuration!"); |
335 | 140 } |
73 | 141 // set our AuthOps |
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142 useAuthorization = dlConfig.getAsBoolean("use-authorization"); |
153 | 143 authOp = (AuthOps) dlConfig.getValue("servlet.auth.op"); |
181 | 144 |
86 | 145 // DocuDirCache instance |
153 | 146 dirCache = (DocuDirCache) dlConfig.getValue("servlet.dir.cache"); |
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147 denyImgFile = (File) dlConfig.getValue("denied-image"); |
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148 errorImgFile = (File) dlConfig.getValue("error-image"); |
153 | 149 sendFileAllowed = dlConfig.getAsBoolean("sendfile-allowed"); |
150 minSubsample = dlConfig.getAsFloat("subsample-minimum"); | |
151 defaultQuality = dlConfig.getAsInt("default-quality"); | |
73 | 152 } |
1 | 153 |
181 | 154 /** Process the HTTP Get request */ |
73 | 155 public void doGet(HttpServletRequest request, HttpServletResponse response) |
335 | 156 throws ServletException, IOException { |
157 accountlog.info("GET from " + request.getRemoteAddr()); | |
73 | 158 // create new request with defaults |
159 DigilibRequest dlReq = new DigilibRequest(); | |
160 // set with request parameters | |
161 dlReq.setWithRequest(request); | |
162 // add DigilibRequest to ServletRequest | |
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163 request.setAttribute("digilib.servlet.request", dlReq); |
73 | 164 // do the processing |
165 processRequest(request, response); | |
166 } | |
1 | 167 |
181 | 168 /** Process the HTTP Post request */ |
298
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169 public void doPost(HttpServletRequest request, HttpServletResponse response) |
335 | 170 throws ServletException, IOException { |
171 accountlog.info("POST from " + request.getRemoteAddr()); | |
73 | 172 // create new request with defaults |
173 DigilibRequest dlReq = new DigilibRequest(); | |
174 // set with request parameters | |
175 dlReq.setWithRequest(request); | |
176 // add DigilibRequest to ServletRequest | |
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177 request.setAttribute("digilib.servlet.request", dlReq); |
73 | 178 // do the processing |
179 processRequest(request, response); | |
180 } | |
181 | |
335 | 182 /* |
183 * (non-Javadoc) | |
184 * | |
185 * @see javax.servlet.http.HttpServlet#getLastModified(javax.servlet.http.HttpServletRequest) | |
186 */ | |
187 protected long getLastModified(HttpServletRequest request) { | |
337 | 188 accountlog.debug("GetLastModified from " + request.getRemoteAddr() |
189 + " for " + request.getQueryString()); | |
335 | 190 long mtime = -1; |
191 // create new request with defaults | |
192 DigilibRequest dlReq = new DigilibRequest(); | |
193 // set with request parameters | |
194 dlReq.setWithRequest(request); | |
195 // find the requested file | |
196 DocuDirent f = findFile(dlReq); | |
197 if (f != null) { | |
198 DocuDirectory dd = (DocuDirectory) f.getParent(); | |
199 mtime = dd.getDirMTime() / 1000 * 1000; | |
200 } | |
201 return mtime; | |
202 } | |
203 | |
73 | 204 /** main request handler. */ |
348 | 205 void processRequest(HttpServletRequest request, HttpServletResponse response) |
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206 throws ServletException { |
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207 |
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208 if (dlConfig == null) { |
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209 throw new ServletException("ERROR: No Configuration!"); |
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210 } |
1 | 211 |
335 | 212 accountlog.debug("request: " + request.getQueryString()); |
213 logger.debug("request: " + request.getQueryString()); | |
214 | |
73 | 215 // time for benchmarking |
216 long startTime = System.currentTimeMillis(); | |
335 | 217 // output mime-type |
73 | 218 String mimeType = "image/png"; |
1 | 219 |
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220 /* parameters for a session */ |
1 | 221 |
73 | 222 // scale the image file to fit window size i.e. respect dw,dh |
223 boolean scaleToFit = true; | |
100 | 224 // scale the image by a fixed factor only |
225 boolean absoluteScale = false; | |
122 | 226 // only crop the image to fit |
227 boolean cropToFit = false; | |
149 | 228 // send the file as is |
229 boolean sendFile = false; | |
230 // use low resolution images only | |
231 boolean loresOnly = false; | |
232 // use hires images only | |
122 | 233 boolean hiresOnly = false; |
352 | 234 // send the image always as a specific type (e.g. JPEG or PNG) |
235 int forceType = ImageOps.TYPE_AUTO; | |
73 | 236 // interpolation to use for scaling |
153 | 237 int scaleQual = defaultQuality; |
73 | 238 // send html error message (or image file) |
239 boolean errorMsgHtml = false; | |
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240 // mirror the image |
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241 boolean doMirror = false; |
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242 // angle of mirror axis |
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243 float mirrorAngle = 0; |
130 | 244 // original (hires) image resolution |
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245 float origResX = 0; |
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246 float origResY = 0; |
1 | 247 |
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248 /* request parameters */ |
73 | 249 |
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250 DigilibRequest dlRequest = (DigilibRequest) request |
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251 .getAttribute("digilib.servlet.request"); |
1 | 252 |
73 | 253 // destination image width |
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254 int paramDW = dlRequest.getAsInt("dw"); |
73 | 255 // destination image height |
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256 int paramDH = dlRequest.getAsInt("dh"); |
73 | 257 // relative area x_offset (0..1) |
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258 float paramWX = dlRequest.getAsFloat("wx"); |
73 | 259 // relative area y_offset |
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260 float paramWY = dlRequest.getAsFloat("wy"); |
73 | 261 // relative area width (0..1) |
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262 float paramWW = dlRequest.getAsFloat("ww"); |
73 | 263 // relative area height |
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264 float paramWH = dlRequest.getAsFloat("wh"); |
73 | 265 // scale factor (additional to dw/width, dh/height) |
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266 float paramWS = dlRequest.getAsFloat("ws"); |
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267 // rotation angle |
298
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268 float paramROT = dlRequest.getAsFloat("rot"); |
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269 // contrast enhancement |
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270 float paramCONT = dlRequest.getAsFloat("cont"); |
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271 // brightness enhancement |
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272 float paramBRGT = dlRequest.getAsFloat("brgt"); |
86 | 273 // color modification |
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274 float[] paramRGBM = null; |
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275 Parameter p = dlRequest.get("rgbm"); |
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276 if (p.hasValue() && (!p.getAsString().equals("0/0/0"))) { |
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277 paramRGBM = p.parseAsFloatArray("/"); |
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278 } |
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279 float[] paramRGBA = null; |
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280 p = dlRequest.get("rgba"); |
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281 if (p.hasValue() && (!p.getAsString().equals("0/0/0"))) { |
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282 paramRGBA = p.parseAsFloatArray("/"); |
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283 } |
130 | 284 // destination resolution (DPI) |
170
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285 float paramDDPIX = dlRequest.getAsFloat("ddpix"); |
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286 float paramDDPIY = dlRequest.getAsFloat("ddpiy"); |
130 | 287 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
288 // if X or Y resolution isn't set, use DDPI | |
170
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289 paramDDPIX = dlRequest.getAsFloat("ddpi"); |
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290 paramDDPIY = paramDDPIX; |
130 | 291 } |
1 | 292 |
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293 /* |
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294 * operation mode: "fit": always fit to page, "clip": send original |
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295 * resolution cropped, "file": send whole file (if allowed) |
73 | 296 */ |
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297 if (dlRequest.hasOption("mo", "clip")) { |
73 | 298 scaleToFit = false; |
100 | 299 absoluteScale = false; |
73 | 300 cropToFit = true; |
149 | 301 sendFile = false; |
302 hiresOnly = true; | |
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303 } else if (dlRequest.hasOption("mo", "fit")) { |
73 | 304 scaleToFit = true; |
100 | 305 absoluteScale = false; |
122 | 306 cropToFit = false; |
149 | 307 sendFile = false; |
308 hiresOnly = false; | |
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309 } else if (dlRequest.hasOption("mo", "osize")) { |
100 | 310 scaleToFit = false; |
311 absoluteScale = true; | |
122 | 312 cropToFit = false; |
149 | 313 sendFile = false; |
122 | 314 hiresOnly = true; |
73 | 315 } |
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316 // operation mode: "lores": try to use scaled image, "hires": use |
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317 // unscaled image |
348 | 318 // "autores": try best fitting resolution |
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319 if (dlRequest.hasOption("mo", "lores")) { |
149 | 320 loresOnly = true; |
321 hiresOnly = false; | |
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322 } else if (dlRequest.hasOption("mo", "hires")) { |
149 | 323 loresOnly = false; |
324 hiresOnly = true; | |
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325 } else if (dlRequest.hasOption("mo", "autores")) { |
149 | 326 loresOnly = false; |
327 hiresOnly = false; | |
328 } | |
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329 // operation mode: "errtxt": error message in html, "errimg": error |
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330 // image |
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331 if (dlRequest.hasOption("mo", "errtxt")) { |
73 | 332 errorMsgHtml = true; |
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333 } else if (dlRequest.hasOption("mo", "errimg")) { |
73 | 334 errorMsgHtml = false; |
335 } | |
336 // operation mode: "q0" - "q2": interpolation quality | |
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337 if (dlRequest.hasOption("mo", "q0")) { |
73 | 338 scaleQual = 0; |
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339 } else if (dlRequest.hasOption("mo", "q1")) { |
73 | 340 scaleQual = 1; |
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341 } else if (dlRequest.hasOption("mo", "q2")) { |
73 | 342 scaleQual = 2; |
343 } | |
303 | 344 // operation mode: "jpg": always use JPEG |
345 if (dlRequest.hasOption("mo", "jpg")) { | |
352 | 346 forceType = ImageOps.TYPE_JPEG; |
347 } | |
348 // operation mode: "png": always use PNG | |
349 if (dlRequest.hasOption("mo", "png")) { | |
350 forceType = ImageOps.TYPE_PNG; | |
335 | 351 } |
1 | 352 |
185 | 353 // check with the maximum allowed size (if set) |
354 int maxImgSize = dlConfig.getAsInt("max-image-size"); | |
355 if (maxImgSize > 0) { | |
298
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356 paramDW = (paramDW * paramWS > maxImgSize) ? (int) (maxImgSize / paramWS) |
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357 : paramDW; |
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358 paramDH = (paramDH * paramWS > maxImgSize) ? (int) (maxImgSize / paramWS) |
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359 : paramDH; |
185 | 360 } |
335 | 361 |
348 | 362 // "big" try for all file/image actions |
73 | 363 try { |
364 | |
161 | 365 // ImageFileset of the image to load |
366 ImageFileset fileset = null; | |
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367 |
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368 /* find the file to load/send */ |
1 | 369 |
73 | 370 // get PathInfo |
371 String loadPathName = dlRequest.getFilePath(); | |
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372 |
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373 /* check permissions */ |
298
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374 if (useAuthorization) { |
73 | 375 // get a list of required roles (empty if no restrictions) |
376 List rolesRequired = authOp.rolesForPath(loadPathName, request); | |
377 if (rolesRequired != null) { | |
298
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378 authlog.debug("Role required: " + rolesRequired); |
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379 authlog.debug("User: " + request.getRemoteUser()); |
73 | 380 // is the current request/user authorized? |
381 if (!authOp.isRoleAuthorized(rolesRequired, request)) { | |
382 // send deny answer and abort | |
298
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383 throw new AuthOpException(); |
73 | 384 } |
385 } | |
335 | 386 } |
1 | 387 |
335 | 388 // find the file |
389 fileset = (ImageFileset) findFile(dlRequest); | |
94 | 390 if (fileset == null) { |
298
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391 throw new FileOpException("File " + loadPathName + "(" |
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392 + dlRequest.getAsInt("pn") + ") not found."); |
94 | 393 } |
181 | 394 |
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395 /* calculate expected source image size */ |
149 | 396 ImageSize expectedSourceSize = new ImageSize(); |
122 | 397 if (scaleToFit) { |
298
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398 float scale = (1 / Math.min(paramWW, paramWH)) * paramWS; |
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399 expectedSourceSize.setSize((int) (paramDW * scale), |
335 | 400 (int) (paramDH * scale)); |
122 | 401 } else { |
298
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402 expectedSourceSize.setSize((int) (paramDW * paramWS), |
335 | 403 (int) (paramDH * paramWS)); |
100 | 404 } |
405 | |
335 | 406 ImageFile fileToLoad; |
170
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407 /* select a resolution */ |
149 | 408 if (hiresOnly) { |
409 // get first element (= highest resolution) | |
170
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410 fileToLoad = fileset.getBiggest(); |
149 | 411 } else if (loresOnly) { |
412 // enforced lores uses next smaller resolution | |
298
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413 fileToLoad = fileset.getNextSmaller(expectedSourceSize); |
149 | 414 if (fileToLoad == null) { |
415 // this is the smallest we have | |
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416 fileToLoad = fileset.getSmallest(); |
149 | 417 } |
418 } else { | |
130 | 419 // autores: use next higher resolution |
298
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420 fileToLoad = fileset.getNextBigger(expectedSourceSize); |
122 | 421 if (fileToLoad == null) { |
130 | 422 // this is the highest we have |
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423 fileToLoad = fileset.getBiggest(); |
122 | 424 } |
86 | 425 } |
298
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426 logger.info("Planning to load: " + fileToLoad.getFile()); |
73 | 427 |
181 | 428 /* |
429 * send the image if its mo=(raw)file | |
430 */ | |
431 if (dlRequest.hasOption("mo", "file") | |
335 | 432 || dlRequest.hasOption("mo", "rawfile")) { |
181 | 433 if (sendFileAllowed) { |
434 String mt = null; | |
435 if (dlRequest.hasOption("mo", "rawfile")) { | |
436 mt = "application/octet-stream"; | |
437 } | |
263 | 438 logger.debug("Sending RAW File as is."); |
181 | 439 ServletOps.sendFile(fileToLoad.getFile(), mt, response); |
263 | 440 logger.info("Done in " |
298
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441 + (System.currentTimeMillis() - startTime) + "ms"); |
263 | 442 return; |
181 | 443 } |
444 } | |
445 | |
86 | 446 // check the source image |
122 | 447 if (!fileToLoad.isChecked()) { |
284 | 448 ImageOps.checkFile(fileToLoad); |
122 | 449 } |
86 | 450 // get the source image type |
451 mimeType = fileToLoad.getMimetype(); | |
149 | 452 // get the source image size |
453 ImageSize imgSize = fileToLoad.getSize(); | |
454 | |
130 | 455 // decide if the image can be sent as is |
298
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456 boolean mimetypeSendable = mimeType.equals("image/jpeg") |
122 | 457 || mimeType.equals("image/png") |
458 || mimeType.equals("image/gif"); | |
298
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459 boolean imagoOptions = dlRequest.hasOption("mo", "hmir") |
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460 || dlRequest.hasOption("mo", "vmir") || (paramROT != 0) |
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461 || (paramRGBM != null) || (paramRGBA != null) |
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462 || (paramCONT != 0) || (paramBRGT != 0); |
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463 boolean imageSendable = mimetypeSendable && !imagoOptions; |
73 | 464 |
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465 /* |
298
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466 * if not autoRes and image smaller than requested size then send as |
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467 * is. if autoRes and image has requested size then send as is. if |
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468 * not autoScale and not scaleToFit nor cropToFit then send as is |
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469 * (mo=file) |
73 | 470 */ |
181 | 471 if (imageSendable |
298
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472 && ((loresOnly && fileToLoad.getSize().isSmallerThan( |
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473 expectedSourceSize)) || (!(loresOnly || hiresOnly) && fileToLoad |
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474 .getSize().fitsIn(expectedSourceSize)))) { |
73 | 475 |
181 | 476 logger.debug("Sending File as is."); |
1 | 477 |
181 | 478 ServletOps.sendFile(fileToLoad.getFile(), null, response); |
479 | |
480 logger.info("Done in " | |
298
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481 + (System.currentTimeMillis() - startTime) + "ms"); |
73 | 482 return; |
483 } | |
1 | 484 |
348 | 485 |
486 /* | |
487 * stop here if we're overloaded... | |
488 * | |
489 * 503 Service Unavailable | |
490 * The server is currently unable to | |
491 * handle the request due to a temporary overloading or maintenance | |
492 * of the server. The implication is that this is a temporary | |
493 * condition which will be alleviated after some delay. If known, | |
494 * the length of the delay MAY be indicated in a Retry-After header. | |
495 * If no Retry-After is given, the client SHOULD handle the response | |
496 * as it would for a 500 response. Note: The existence of the 503 | |
497 * status code does not imply that a server must use it when | |
498 * becoming overloaded. Some servers may wish to simply refuse the | |
499 * connection. | |
500 * (RFC2616 HTTP1.1) | |
501 */ | |
502 if (! DigilibWorker.canRun()) { | |
503 logger.error("Servlet overloaded!"); | |
504 response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE); | |
505 return; | |
506 } | |
507 | |
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508 // set missing dw or dh from aspect ratio |
298
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509 float imgAspect = fileToLoad.getAspect(); |
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510 if (paramDW == 0) { |
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511 paramDW = (int) Math.round(paramDH * imgAspect); |
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512 } else if (paramDH == 0) { |
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513 paramDH = (int) Math.round(paramDW / imgAspect); |
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514 } |
149 | 515 |
335 | 516 /* |
517 * prepare resolution for original size | |
518 */ | |
519 if (absoluteScale) { | |
520 // get original resolution from metadata | |
521 fileset.checkMeta(); | |
522 origResX = fileset.getResX(); | |
523 origResY = fileset.getResY(); | |
524 if ((origResX == 0) || (origResY == 0)) { | |
525 throw new ImageOpException("Missing image DPI information!"); | |
526 } | |
527 | |
528 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { | |
529 throw new ImageOpException( | |
530 "Missing display DPI information!"); | |
531 } | |
532 } | |
533 | |
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534 /* crop and scale the image */ |
1 | 535 |
298
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536 logger.debug("IMG: " + imgSize.getWidth() + "x" |
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537 + imgSize.getHeight()); |
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538 logger.debug("time " + (System.currentTimeMillis() - startTime) |
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539 + "ms"); |
1 | 540 |
73 | 541 // coordinates and scaling |
298
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542 float areaXoff; |
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543 float areaYoff; |
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544 float areaWidth; |
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545 float areaHeight; |
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546 float scaleX; |
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547 float scaleY; |
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548 float scaleXY; |
1 | 549 |
100 | 550 // coordinates using Java2D |
551 // image size in pixels | |
298
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552 Rectangle2D imgBounds = new Rectangle2D.Float(0, 0, imgSize |
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553 .getWidth(), imgSize.getHeight()); |
100 | 554 // user window area in [0,1] coordinates |
298
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555 Rectangle2D relUserArea = new Rectangle2D.Float(paramWX, paramWY, |
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556 paramWW, paramWH); |
100 | 557 // transform from relative [0,1] to image coordinates. |
298
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558 AffineTransform imgTrafo = AffineTransform.getScaleInstance(imgSize |
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559 .getWidth(), imgSize.getHeight()); |
85 | 560 // transform user coordinate area to image coordinate area |
298
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561 Rectangle2D userImgArea = imgTrafo.createTransformedShape( |
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562 relUserArea).getBounds2D(); |
100 | 563 |
564 // calculate scaling factors based on inner user area | |
73 | 565 if (scaleToFit) { |
298
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566 areaWidth = (float) userImgArea.getWidth(); |
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567 areaHeight = (float) userImgArea.getHeight(); |
73 | 568 scaleX = paramDW / areaWidth * paramWS; |
569 scaleY = paramDH / areaHeight * paramWS; | |
570 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
100 | 571 } else if (absoluteScale) { |
572 // absolute scale | |
130 | 573 scaleX = paramDDPIX / origResX; |
574 scaleY = paramDDPIY / origResY; | |
575 // currently only same scale :-( | |
576 scaleXY = scaleX; | |
577 areaWidth = paramDW / scaleXY * paramWS; | |
578 areaHeight = paramDH / scaleXY * paramWS; | |
100 | 579 // reset user area size |
298
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580 userImgArea.setRect(userImgArea.getX(), userImgArea.getY(), |
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581 areaWidth, areaHeight); |
73 | 582 } else { |
583 // crop to fit | |
85 | 584 areaWidth = paramDW * paramWS; |
585 areaHeight = paramDH * paramWS; | |
100 | 586 // reset user area size |
298
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587 userImgArea.setRect(userImgArea.getX(), userImgArea.getY(), |
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588 areaWidth, areaHeight); |
73 | 589 scaleX = 1f; |
590 scaleY = 1f; | |
591 scaleXY = 1f; | |
100 | 592 } |
85 | 593 |
100 | 594 // enlarge image area for rotations to cover additional pixels |
595 Rectangle2D outerUserImgArea = userImgArea; | |
596 Rectangle2D innerUserImgArea = userImgArea; | |
597 if (wholeRotArea) { | |
598 if (paramROT != 0) { | |
599 try { | |
170
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600 // rotate user area coordinates around center of user |
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601 // area |
298
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602 AffineTransform rotTrafo = AffineTransform |
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603 .getRotateInstance(Math.toRadians(paramROT), |
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604 userImgArea.getCenterX(), userImgArea |
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605 .getCenterY()); |
170
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606 // get bounds from rotated end position |
298
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607 innerUserImgArea = rotTrafo.createTransformedShape( |
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608 userImgArea).getBounds2D(); |
100 | 609 // get bounds from back-rotated bounds |
298
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610 outerUserImgArea = rotTrafo.createInverse() |
100 | 611 .createTransformedShape(innerUserImgArea) |
612 .getBounds2D(); | |
613 } catch (NoninvertibleTransformException e1) { | |
614 // this shouldn't happen anyway | |
298
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615 logger.error(e1); |
100 | 616 } |
617 } | |
73 | 618 } |
1 | 619 |
298
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620 logger.debug("Scale " + scaleXY + "(" + scaleX + "," + scaleY |
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621 + ") on " + outerUserImgArea); |
1 | 622 |
73 | 623 // clip area at the image border |
100 | 624 outerUserImgArea = outerUserImgArea.createIntersection(imgBounds); |
85 | 625 |
73 | 626 // check image parameters sanity |
298
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627 if ((outerUserImgArea.getWidth() < 1) |
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628 || (outerUserImgArea.getHeight() < 1) |
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629 || (scaleXY * outerUserImgArea.getWidth() < 2) |
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630 || (scaleXY * outerUserImgArea.getHeight() < 2)) { |
181 | 631 logger.error("ERROR: invalid scale parameter set!"); |
73 | 632 throw new ImageOpException("Invalid scale parameter set!"); |
633 } | |
1 | 634 |
298
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635 /* |
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636 * submit the image worker job |
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637 */ |
85 | 638 |
298
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639 DigilibWorker job = new DigilibImageWorker(dlConfig, response, |
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640 mimeType, scaleQual, dlRequest, paramROT, paramCONT, |
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641 paramBRGT, paramRGBM, paramRGBA, fileToLoad, scaleXY, |
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642 outerUserImgArea, innerUserImgArea, minSubsample, |
352 | 643 wholeRotArea, forceType); |
85 | 644 |
298
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645 job.run(); |
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646 if (job.hasError()) { |
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647 throw new ImageOpException(job.getError().toString()); |
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648 } |
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649 |
298
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650 logger.debug("servlet done in " |
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651 + (System.currentTimeMillis() - startTime)); |
73 | 652 |
170
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653 /* error handling */ |
1 | 654 |
73 | 655 } // end of "big" try |
156 | 656 catch (IOException e) { |
298
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657 logger.error("ERROR: File IO Error: " + e); |
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658 digilibError(errorMsgHtml, ERROR_FILE, |
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659 "ERROR: File IO Error: " + e, response); |
73 | 660 } catch (AuthOpException e) { |
298
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661 logger.error("ERROR: Authorization error: " + e); |
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662 digilibError(errorMsgHtml, ERROR_AUTH, |
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663 "ERROR: Authorization error: " + e, response); |
73 | 664 } catch (ImageOpException e) { |
298
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665 logger.error("ERROR: Image Error: " + e); |
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666 digilibError(errorMsgHtml, ERROR_IMAGE, |
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667 "ERROR: Image Operation Error: " + e, response); |
73 | 668 } catch (RuntimeException e) { |
669 // JAI likes to throw RuntimeExceptions ;-( | |
298
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670 logger.error("ERROR: Other Image Error: " + e); |
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671 digilibError(errorMsgHtml, ERROR_IMAGE, |
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672 "ERROR: Other Image Operation Error: " + e, response); |
73 | 673 } |
674 } | |
298
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675 /** |
335 | 676 * Returns the DocuDirent corresponding to the DigilibRequest. |
677 * | |
678 * @param dlRequest | |
679 * @return | |
680 */ | |
681 public DocuDirent findFile(DigilibRequest dlRequest) { | |
682 // find the file(set) | |
683 DocuDirent f = dirCache.getFile(dlRequest.getFilePath(), dlRequest | |
684 .getAsInt("pn"), FileOps.CLASS_IMAGE); | |
685 return f; | |
686 } | |
687 | |
688 /** | |
298
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689 * Sends an error to the client as text or image. |
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690 * |
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691 * @param asHTML |
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692 * @param type |
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693 * @param msg |
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694 * @param response |
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695 */ |
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696 public void digilibError(boolean asHTML, int type, String msg, |
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697 HttpServletResponse response) { |
335 | 698 try { |
298
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699 File img = null; |
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700 if (type == ERROR_AUTH) { |
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701 if (msg == null) { |
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702 msg = "ERROR: Unauthorized access!"; |
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703 } |
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704 img = denyImgFile; |
335 | 705 } else { |
298
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706 if (msg == null) { |
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707 msg = "ERROR: Other image error!"; |
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708 } |
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709 img = this.errorImgFile; |
335 | 710 } |
298
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711 if (asHTML && (img != null)) { |
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712 ServletOps.htmlMessage(msg, response); |
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713 } else { |
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714 ServletOps.sendFile(img, null, response); |
335 | 715 } |
298
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716 } catch (IOException e) { |
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717 logger.error("Error sending error!", e); |
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718 } |
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719 |
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720 } |
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721 |
348 | 722 } // Scaler class |