Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 405:ffb2036da205
first stab at PDF printer servlet. DOES NOT WORK YET!
author | robcast |
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date | Fri, 09 Dec 2005 20:20:09 +0100 |
parents | 31643c12d939 |
children | 530b7b58a727 |
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) */ |
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62 public static final String dlVersion = "1.5.9g"; |
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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 = ServletOps.getFile((File) dlConfig.getValue("denied-image"), config); |
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151 errorImgFile = ServletOps.getFile((File) dlConfig.getValue("error-image"), config); |
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152 notfoundImgFile = ServletOps.getFile((File) dlConfig.getValue("notfound-image"), config); |
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 */ |
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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 /* preset request parameters */ |
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; | |
149 | 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; | |
130 | 240 // original (hires) image resolution |
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241 float origResX = 0; |
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242 float origResY = 0; |
1 | 243 |
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244 /* request parameters */ |
73 | 245 |
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246 DigilibRequest dlRequest = (DigilibRequest) request |
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247 .getAttribute("digilib.servlet.request"); |
1 | 248 |
73 | 249 // destination image width |
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250 int paramDW = dlRequest.getAsInt("dw"); |
73 | 251 // destination image height |
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252 int paramDH = dlRequest.getAsInt("dh"); |
73 | 253 // relative area x_offset (0..1) |
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254 float paramWX = dlRequest.getAsFloat("wx"); |
73 | 255 // relative area y_offset |
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256 float paramWY = dlRequest.getAsFloat("wy"); |
73 | 257 // relative area width (0..1) |
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258 float paramWW = dlRequest.getAsFloat("ww"); |
73 | 259 // relative area height |
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260 float paramWH = dlRequest.getAsFloat("wh"); |
73 | 261 // scale factor (additional to dw/width, dh/height) |
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262 float paramWS = dlRequest.getAsFloat("ws"); |
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263 // rotation angle |
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264 float paramROT = dlRequest.getAsFloat("rot"); |
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265 // contrast enhancement |
170
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266 float paramCONT = dlRequest.getAsFloat("cont"); |
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267 // brightness enhancement |
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268 float paramBRGT = dlRequest.getAsFloat("brgt"); |
86 | 269 // color modification |
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270 float[] paramRGBM = null; |
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271 Parameter p = dlRequest.get("rgbm"); |
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272 if (p.hasValue() && (!p.getAsString().equals("0/0/0"))) { |
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273 paramRGBM = p.parseAsFloatArray("/"); |
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274 } |
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275 float[] paramRGBA = null; |
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276 p = dlRequest.get("rgba"); |
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277 if (p.hasValue() && (!p.getAsString().equals("0/0/0"))) { |
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278 paramRGBA = p.parseAsFloatArray("/"); |
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279 } |
130 | 280 // destination resolution (DPI) |
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281 float paramDDPIX = dlRequest.getAsFloat("ddpix"); |
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282 float paramDDPIY = dlRequest.getAsFloat("ddpiy"); |
130 | 283 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
284 // if X or Y resolution isn't set, use DDPI | |
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285 paramDDPIX = dlRequest.getAsFloat("ddpi"); |
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286 paramDDPIY = paramDDPIX; |
130 | 287 } |
1 | 288 |
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289 /* |
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290 * operation mode: "fit": always fit to page, "clip": send original |
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291 * resolution cropped, "file": send whole file (if allowed) |
73 | 292 */ |
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293 if (dlRequest.hasOption("mo", "clip")) { |
73 | 294 scaleToFit = false; |
100 | 295 absoluteScale = false; |
149 | 296 hiresOnly = true; |
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297 } else if (dlRequest.hasOption("mo", "fit")) { |
73 | 298 scaleToFit = true; |
100 | 299 absoluteScale = false; |
149 | 300 hiresOnly = false; |
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301 } else if (dlRequest.hasOption("mo", "osize")) { |
100 | 302 scaleToFit = false; |
303 absoluteScale = true; | |
122 | 304 hiresOnly = true; |
73 | 305 } |
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306 // operation mode: "lores": try to use scaled image, "hires": use |
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307 // unscaled image |
348 | 308 // "autores": try best fitting resolution |
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309 if (dlRequest.hasOption("mo", "lores")) { |
149 | 310 loresOnly = true; |
311 hiresOnly = false; | |
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312 } else if (dlRequest.hasOption("mo", "hires")) { |
149 | 313 loresOnly = false; |
314 hiresOnly = true; | |
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315 } else if (dlRequest.hasOption("mo", "autores")) { |
149 | 316 loresOnly = false; |
317 hiresOnly = false; | |
318 } | |
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319 // operation mode: "errtxt": error message in html, "errimg": error |
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320 // image |
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321 if (dlRequest.hasOption("mo", "errtxt")) { |
73 | 322 errorMsgHtml = true; |
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323 } else if (dlRequest.hasOption("mo", "errimg")) { |
73 | 324 errorMsgHtml = false; |
325 } | |
326 // operation mode: "q0" - "q2": interpolation quality | |
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327 if (dlRequest.hasOption("mo", "q0")) { |
73 | 328 scaleQual = 0; |
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329 } else if (dlRequest.hasOption("mo", "q1")) { |
73 | 330 scaleQual = 1; |
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331 } else if (dlRequest.hasOption("mo", "q2")) { |
73 | 332 scaleQual = 2; |
333 } | |
303 | 334 // operation mode: "jpg": always use JPEG |
335 if (dlRequest.hasOption("mo", "jpg")) { | |
352 | 336 forceType = ImageOps.TYPE_JPEG; |
337 } | |
338 // operation mode: "png": always use PNG | |
339 if (dlRequest.hasOption("mo", "png")) { | |
340 forceType = ImageOps.TYPE_PNG; | |
335 | 341 } |
1 | 342 |
185 | 343 // check with the maximum allowed size (if set) |
344 int maxImgSize = dlConfig.getAsInt("max-image-size"); | |
345 if (maxImgSize > 0) { | |
298
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346 paramDW = (paramDW * paramWS > maxImgSize) ? (int) (maxImgSize / paramWS) |
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347 : paramDW; |
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348 paramDH = (paramDH * paramWS > maxImgSize) ? (int) (maxImgSize / paramWS) |
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349 : paramDH; |
185 | 350 } |
335 | 351 |
348 | 352 // "big" try for all file/image actions |
73 | 353 try { |
354 | |
161 | 355 // ImageFileset of the image to load |
356 ImageFileset fileset = null; | |
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357 |
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358 /* find the file to load/send */ |
1 | 359 |
73 | 360 // get PathInfo |
361 String loadPathName = dlRequest.getFilePath(); | |
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362 |
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363 /* check permissions */ |
298
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364 if (useAuthorization) { |
73 | 365 // get a list of required roles (empty if no restrictions) |
366 List rolesRequired = authOp.rolesForPath(loadPathName, request); | |
367 if (rolesRequired != null) { | |
298
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368 authlog.debug("Role required: " + rolesRequired); |
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369 authlog.debug("User: " + request.getRemoteUser()); |
73 | 370 // is the current request/user authorized? |
371 if (!authOp.isRoleAuthorized(rolesRequired, request)) { | |
372 // send deny answer and abort | |
298
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373 throw new AuthOpException(); |
73 | 374 } |
375 } | |
335 | 376 } |
1 | 377 |
335 | 378 // find the file |
379 fileset = (ImageFileset) findFile(dlRequest); | |
94 | 380 if (fileset == null) { |
298
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381 throw new FileOpException("File " + loadPathName + "(" |
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382 + dlRequest.getAsInt("pn") + ") not found."); |
94 | 383 } |
181 | 384 |
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385 /* calculate expected source image size */ |
149 | 386 ImageSize expectedSourceSize = new ImageSize(); |
122 | 387 if (scaleToFit) { |
298
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388 float scale = (1 / Math.min(paramWW, paramWH)) * paramWS; |
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389 expectedSourceSize.setSize((int) (paramDW * scale), |
335 | 390 (int) (paramDH * scale)); |
122 | 391 } else { |
298
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392 expectedSourceSize.setSize((int) (paramDW * paramWS), |
335 | 393 (int) (paramDH * paramWS)); |
100 | 394 } |
395 | |
335 | 396 ImageFile fileToLoad; |
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397 /* select a resolution */ |
149 | 398 if (hiresOnly) { |
399 // get first element (= highest resolution) | |
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400 fileToLoad = fileset.getBiggest(); |
149 | 401 } else if (loresOnly) { |
402 // enforced lores uses next smaller resolution | |
298
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403 fileToLoad = fileset.getNextSmaller(expectedSourceSize); |
149 | 404 if (fileToLoad == null) { |
405 // this is the smallest we have | |
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406 fileToLoad = fileset.getSmallest(); |
149 | 407 } |
408 } else { | |
130 | 409 // autores: use next higher resolution |
298
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410 fileToLoad = fileset.getNextBigger(expectedSourceSize); |
122 | 411 if (fileToLoad == null) { |
130 | 412 // this is the highest we have |
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413 fileToLoad = fileset.getBiggest(); |
122 | 414 } |
86 | 415 } |
298
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416 logger.info("Planning to load: " + fileToLoad.getFile()); |
73 | 417 |
181 | 418 /* |
419 * send the image if its mo=(raw)file | |
420 */ | |
421 if (dlRequest.hasOption("mo", "file") | |
335 | 422 || dlRequest.hasOption("mo", "rawfile")) { |
181 | 423 if (sendFileAllowed) { |
424 String mt = null; | |
425 if (dlRequest.hasOption("mo", "rawfile")) { | |
426 mt = "application/octet-stream"; | |
427 } | |
263 | 428 logger.debug("Sending RAW File as is."); |
181 | 429 ServletOps.sendFile(fileToLoad.getFile(), mt, response); |
263 | 430 logger.info("Done in " |
298
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431 + (System.currentTimeMillis() - startTime) + "ms"); |
263 | 432 return; |
181 | 433 } |
434 } | |
435 | |
86 | 436 // check the source image |
122 | 437 if (!fileToLoad.isChecked()) { |
284 | 438 ImageOps.checkFile(fileToLoad); |
122 | 439 } |
86 | 440 // get the source image type |
441 mimeType = fileToLoad.getMimetype(); | |
149 | 442 // get the source image size |
443 ImageSize imgSize = fileToLoad.getSize(); | |
444 | |
130 | 445 // decide if the image can be sent as is |
298
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446 boolean mimetypeSendable = mimeType.equals("image/jpeg") |
122 | 447 || mimeType.equals("image/png") |
448 || mimeType.equals("image/gif"); | |
298
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449 boolean imagoOptions = dlRequest.hasOption("mo", "hmir") |
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450 || dlRequest.hasOption("mo", "vmir") || (paramROT != 0) |
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451 || (paramRGBM != null) || (paramRGBA != null) |
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452 || (paramCONT != 0) || (paramBRGT != 0); |
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453 boolean imageSendable = mimetypeSendable && !imagoOptions; |
73 | 454 |
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455 /* |
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456 * if not autoRes and image smaller than requested size then send as |
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457 * is. if autoRes and image has requested size then send as is. if |
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458 * not autoScale and not scaleToFit nor cropToFit then send as is |
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459 * (mo=file) |
73 | 460 */ |
181 | 461 if (imageSendable |
298
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462 && ((loresOnly && fileToLoad.getSize().isSmallerThan( |
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463 expectedSourceSize)) || (!(loresOnly || hiresOnly) && fileToLoad |
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464 .getSize().fitsIn(expectedSourceSize)))) { |
73 | 465 |
181 | 466 logger.debug("Sending File as is."); |
1 | 467 |
181 | 468 ServletOps.sendFile(fileToLoad.getFile(), null, response); |
469 | |
470 logger.info("Done in " | |
298
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471 + (System.currentTimeMillis() - startTime) + "ms"); |
73 | 472 return; |
473 } | |
1 | 474 |
348 | 475 |
476 /* | |
477 * stop here if we're overloaded... | |
478 * | |
479 * 503 Service Unavailable | |
480 * The server is currently unable to | |
481 * handle the request due to a temporary overloading or maintenance | |
482 * of the server. The implication is that this is a temporary | |
483 * condition which will be alleviated after some delay. If known, | |
484 * the length of the delay MAY be indicated in a Retry-After header. | |
485 * If no Retry-After is given, the client SHOULD handle the response | |
486 * as it would for a 500 response. Note: The existence of the 503 | |
487 * status code does not imply that a server must use it when | |
488 * becoming overloaded. Some servers may wish to simply refuse the | |
489 * connection. | |
490 * (RFC2616 HTTP1.1) | |
491 */ | |
492 if (! DigilibWorker.canRun()) { | |
493 logger.error("Servlet overloaded!"); | |
494 response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE); | |
495 return; | |
496 } | |
497 | |
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498 // set missing dw or dh from aspect ratio |
298
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499 float imgAspect = fileToLoad.getAspect(); |
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500 if (paramDW == 0) { |
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501 paramDW = (int) Math.round(paramDH * imgAspect); |
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502 } else if (paramDH == 0) { |
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503 paramDH = (int) Math.round(paramDW / imgAspect); |
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504 } |
149 | 505 |
335 | 506 /* |
507 * prepare resolution for original size | |
508 */ | |
509 if (absoluteScale) { | |
510 // get original resolution from metadata | |
511 fileset.checkMeta(); | |
512 origResX = fileset.getResX(); | |
513 origResY = fileset.getResY(); | |
514 if ((origResX == 0) || (origResY == 0)) { | |
515 throw new ImageOpException("Missing image DPI information!"); | |
516 } | |
517 | |
518 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { | |
519 throw new ImageOpException( | |
520 "Missing display DPI information!"); | |
521 } | |
522 } | |
523 | |
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524 /* crop and scale the image */ |
1 | 525 |
298
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526 logger.debug("IMG: " + imgSize.getWidth() + "x" |
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527 + imgSize.getHeight()); |
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528 logger.debug("time " + (System.currentTimeMillis() - startTime) |
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529 + "ms"); |
1 | 530 |
73 | 531 // coordinates and scaling |
298
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532 float areaWidth; |
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533 float areaHeight; |
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534 float scaleX; |
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535 float scaleY; |
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536 float scaleXY; |
1 | 537 |
100 | 538 // coordinates using Java2D |
539 // image size in pixels | |
298
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540 Rectangle2D imgBounds = new Rectangle2D.Float(0, 0, imgSize |
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541 .getWidth(), imgSize.getHeight()); |
100 | 542 // user window area in [0,1] coordinates |
298
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543 Rectangle2D relUserArea = new Rectangle2D.Float(paramWX, paramWY, |
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544 paramWW, paramWH); |
100 | 545 // transform from relative [0,1] to image coordinates. |
298
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546 AffineTransform imgTrafo = AffineTransform.getScaleInstance(imgSize |
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547 .getWidth(), imgSize.getHeight()); |
85 | 548 // transform user coordinate area to image coordinate area |
298
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549 Rectangle2D userImgArea = imgTrafo.createTransformedShape( |
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550 relUserArea).getBounds2D(); |
100 | 551 |
552 // calculate scaling factors based on inner user area | |
73 | 553 if (scaleToFit) { |
298
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554 areaWidth = (float) userImgArea.getWidth(); |
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555 areaHeight = (float) userImgArea.getHeight(); |
73 | 556 scaleX = paramDW / areaWidth * paramWS; |
557 scaleY = paramDH / areaHeight * paramWS; | |
558 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
100 | 559 } else if (absoluteScale) { |
560 // absolute scale | |
130 | 561 scaleX = paramDDPIX / origResX; |
562 scaleY = paramDDPIY / origResY; | |
563 // currently only same scale :-( | |
564 scaleXY = scaleX; | |
565 areaWidth = paramDW / scaleXY * paramWS; | |
566 areaHeight = paramDH / scaleXY * paramWS; | |
100 | 567 // reset user area size |
298
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568 userImgArea.setRect(userImgArea.getX(), userImgArea.getY(), |
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569 areaWidth, areaHeight); |
73 | 570 } else { |
571 // crop to fit | |
85 | 572 areaWidth = paramDW * paramWS; |
573 areaHeight = paramDH * paramWS; | |
100 | 574 // reset user area size |
298
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575 userImgArea.setRect(userImgArea.getX(), userImgArea.getY(), |
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576 areaWidth, areaHeight); |
73 | 577 scaleX = 1f; |
578 scaleY = 1f; | |
579 scaleXY = 1f; | |
100 | 580 } |
85 | 581 |
100 | 582 // enlarge image area for rotations to cover additional pixels |
583 Rectangle2D outerUserImgArea = userImgArea; | |
584 Rectangle2D innerUserImgArea = userImgArea; | |
585 if (wholeRotArea) { | |
586 if (paramROT != 0) { | |
587 try { | |
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588 // rotate user area coordinates around center of user |
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589 // area |
298
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590 AffineTransform rotTrafo = AffineTransform |
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591 .getRotateInstance(Math.toRadians(paramROT), |
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592 userImgArea.getCenterX(), userImgArea |
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593 .getCenterY()); |
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594 // get bounds from rotated end position |
298
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595 innerUserImgArea = rotTrafo.createTransformedShape( |
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596 userImgArea).getBounds2D(); |
100 | 597 // get bounds from back-rotated bounds |
298
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598 outerUserImgArea = rotTrafo.createInverse() |
100 | 599 .createTransformedShape(innerUserImgArea) |
600 .getBounds2D(); | |
601 } catch (NoninvertibleTransformException e1) { | |
602 // this shouldn't happen anyway | |
298
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603 logger.error(e1); |
100 | 604 } |
605 } | |
73 | 606 } |
1 | 607 |
298
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608 logger.debug("Scale " + scaleXY + "(" + scaleX + "," + scaleY |
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609 + ") on " + outerUserImgArea); |
1 | 610 |
73 | 611 // clip area at the image border |
100 | 612 outerUserImgArea = outerUserImgArea.createIntersection(imgBounds); |
85 | 613 |
73 | 614 // check image parameters sanity |
298
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615 if ((outerUserImgArea.getWidth() < 1) |
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616 || (outerUserImgArea.getHeight() < 1) |
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617 || (scaleXY * outerUserImgArea.getWidth() < 2) |
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618 || (scaleXY * outerUserImgArea.getHeight() < 2)) { |
181 | 619 logger.error("ERROR: invalid scale parameter set!"); |
73 | 620 throw new ImageOpException("Invalid scale parameter set!"); |
621 } | |
1 | 622 |
298
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623 /* |
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624 * submit the image worker job |
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625 */ |
85 | 626 |
298
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627 DigilibWorker job = new DigilibImageWorker(dlConfig, response, |
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628 mimeType, scaleQual, dlRequest, paramROT, paramCONT, |
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629 paramBRGT, paramRGBM, paramRGBA, fileToLoad, scaleXY, |
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630 outerUserImgArea, innerUserImgArea, minSubsample, |
352 | 631 wholeRotArea, forceType); |
85 | 632 |
298
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633 job.run(); |
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634 if (job.hasError()) { |
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635 throw new ImageOpException(job.getError().toString()); |
79
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636 } |
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637 |
298
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638 logger.debug("servlet done in " |
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639 + (System.currentTimeMillis() - startTime)); |
73 | 640 |
170
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641 /* error handling */ |
1 | 642 |
73 | 643 } // end of "big" try |
156 | 644 catch (IOException e) { |
298
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645 logger.error("ERROR: File IO Error: " + e); |
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646 digilibError(errorMsgHtml, ERROR_FILE, |
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647 "ERROR: File IO Error: " + e, response); |
73 | 648 } catch (AuthOpException e) { |
298
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649 logger.error("ERROR: Authorization error: " + e); |
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650 digilibError(errorMsgHtml, ERROR_AUTH, |
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651 "ERROR: Authorization error: " + e, response); |
73 | 652 } catch (ImageOpException e) { |
298
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653 logger.error("ERROR: Image Error: " + e); |
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654 digilibError(errorMsgHtml, ERROR_IMAGE, |
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655 "ERROR: Image Operation Error: " + e, response); |
73 | 656 } catch (RuntimeException e) { |
657 // JAI likes to throw RuntimeExceptions ;-( | |
298
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658 logger.error("ERROR: Other Image Error: " + e); |
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659 digilibError(errorMsgHtml, ERROR_IMAGE, |
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660 "ERROR: Other Image Operation Error: " + e, response); |
73 | 661 } |
662 } | |
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663 |
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664 /** |
335 | 665 * Returns the DocuDirent corresponding to the DigilibRequest. |
666 * | |
667 * @param dlRequest | |
668 * @return | |
669 */ | |
670 public DocuDirent findFile(DigilibRequest dlRequest) { | |
671 // find the file(set) | |
672 DocuDirent f = dirCache.getFile(dlRequest.getFilePath(), dlRequest | |
673 .getAsInt("pn"), FileOps.CLASS_IMAGE); | |
674 return f; | |
675 } | |
676 | |
677 /** | |
298
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678 * Sends an error to the client as text or image. |
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679 * |
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680 * @param asHTML |
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681 * @param type |
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682 * @param msg |
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683 * @param response |
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684 */ |
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685 public void digilibError(boolean asHTML, int type, String msg, |
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686 HttpServletResponse response) { |
335 | 687 try { |
298
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688 File img = null; |
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689 if (type == ERROR_AUTH) { |
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690 if (msg == null) { |
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691 msg = "ERROR: Unauthorized access!"; |
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692 } |
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693 img = denyImgFile; |
363 | 694 } else if (type == ERROR_FILE) { |
695 if (msg == null) { | |
696 msg = "ERROR: Image file not found!"; | |
697 } | |
698 img = notfoundImgFile; | |
335 | 699 } else { |
298
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700 if (msg == null) { |
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701 msg = "ERROR: Other image error!"; |
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702 } |
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703 img = this.errorImgFile; |
335 | 704 } |
298
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705 if (asHTML && (img != null)) { |
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706 ServletOps.htmlMessage(msg, response); |
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707 } else { |
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708 ServletOps.sendFile(img, null, response); |
335 | 709 } |
298
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710 } catch (IOException e) { |
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711 logger.error("Error sending error!", e); |
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712 } |
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713 |
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714 } |
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715 |
348 | 716 } // Scaler class |