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1 package digilib.servlet;
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2
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3 import java.awt.Image;
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4 import java.awt.geom.Rectangle2D;
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5 import java.io.BufferedOutputStream;
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6 import java.io.File;
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7 import java.io.IOException;
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8 import java.io.InputStream;
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9 import java.io.OutputStream;
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10 import java.util.List;
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11
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12 import javax.servlet.ServletConfig;
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13 import javax.servlet.ServletContext;
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14 import javax.servlet.ServletException;
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15 import javax.servlet.http.HttpServletRequest;
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16 import javax.servlet.http.HttpServletResponse;
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17
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18 import org.apache.log4j.Logger;
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19
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20 import digilib.auth.AuthOpException;
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21 import digilib.auth.AuthOps;
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22 import digilib.image.ImageOpException;
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23 import digilib.io.DocuDirCache;
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24 import digilib.io.DocuDirent;
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25 import digilib.io.FileOpException;
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26 import digilib.io.FileOps;
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27 import digilib.io.ImageFile;
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28 import digilib.io.ImageFileset;
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29
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30 public class Scaler extends RequestHandler {
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31
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32 /** digilib servlet version (for all components) */
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33 public static final String dlVersion = "1.7.0b";
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34
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35 /** general error code */
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36 public static final int ERROR_UNKNOWN = 0;
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37
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38 /** error code for authentication error */
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39 public static final int ERROR_AUTH = 1;
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40
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41 /** error code for file operation error */
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42 public static final int ERROR_FILE = 2;
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43
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44 /** error code for image operation error */
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45 public static final int ERROR_IMAGE = 3;
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46
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47 /** DocuDirCache instance */
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48 DocuDirCache dirCache;
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49
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50 /** authentication error image file */
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51 File denyImgFile;
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52
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53 /** image error image file */
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54 File errorImgFile;
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55
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56 /** not found error image file */
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57 File notfoundImgFile;
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58
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59 /** subsampling before scaling */
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60 float minSubsample = 2f;
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61
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62 /** send files as is? */
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63 boolean sendFileAllowed = true;
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64
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65 /** default scaling quality */
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66 int defaultQuality = 1;
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67
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68 /** DigilibConfiguration instance */
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69 DigilibConfiguration dlConfig;
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70
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71 /** use authorization database */
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72 boolean useAuthorization = true;
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73
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74 /** AuthOps instance */
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75 AuthOps authOp;
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76
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77 // EXPRIMENTAL
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78 /** try to enlarge cropping area for "oblique" angles */
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79 boolean wholeRotArea = false;
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80
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81 /**
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82 * Initialisation on first run.
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83 *
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84 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig)
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85 */
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86 public void init(ServletConfig config) throws ServletException {
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87 super.init(config);
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88
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89 System.out
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90 .println("***** Digital Image Library Image Scaler Servlet (version "
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91 + dlVersion + ") *****");
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92 // say hello in the log file
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93 logger
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94 .info("***** Digital Image Library Image Scaler Servlet (version "
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95 + dlVersion + ") *****");
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96
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97 // get our ServletContext
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98 ServletContext context = config.getServletContext();
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99 // see if there is a Configuration instance
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100 dlConfig = (DigilibConfiguration) context
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101 .getAttribute("digilib.servlet.configuration");
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102 if (dlConfig == null) {
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103 // no Configuration
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104 throw new ServletException("No Configuration!");
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105 }
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106 // set our AuthOps
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107 useAuthorization = dlConfig.getAsBoolean("use-authorization");
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108 authOp = (AuthOps) dlConfig.getValue("servlet.auth.op");
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109
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110 // DocuDirCache instance
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111 dirCache = (DocuDirCache) dlConfig.getValue("servlet.dir.cache");
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112 denyImgFile = ServletOps.getFile((File) dlConfig.getValue("denied-image"), config);
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113 errorImgFile = ServletOps.getFile((File) dlConfig.getValue("error-image"), config);
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114 notfoundImgFile = ServletOps.getFile((File) dlConfig.getValue("notfound-image"), config);
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115 sendFileAllowed = dlConfig.getAsBoolean("sendfile-allowed");
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116 minSubsample = dlConfig.getAsFloat("subsample-minimum");
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117 defaultQuality = dlConfig.getAsInt("default-quality");
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118 }
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119
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120 @Override
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121 public void processRequest(HttpServletRequest request,
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122 HttpServletResponse response) throws ServletException, ImageOpException {
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123
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124
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125 if (dlConfig == null) {
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126 throw new ServletException("ERROR: No Configuration!");
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127 }
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128
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129
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130
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131 accountlog.debug("request: " + request.getQueryString());
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132 logger.debug("request: " + request.getQueryString());
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133
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134
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135
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136 // define the job information
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137 ImageJobInformation jobdeclaration = new ImageJobInformation();
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138 jobdeclaration.setWithRequest(request);
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139 jobdeclaration.setConfig(dlConfig);
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140
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141 ImageFile fileToLoad = null;
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142 try {
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143 fileToLoad = jobdeclaration.get_fileToLoad();
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144 } catch (IOException e2) {
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145 // TODO Auto-generated catch block
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146 e2.printStackTrace();
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147 return;
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148 }
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149
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150
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151 // if requested, send image as a file
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152 if(sendFileAllowed && jobdeclaration.checkSendAsFile()){
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153 String mt = null;
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154 if (jobdeclaration.hasOption("mo", "rawfile")) {
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155 mt = "application/octet-stream";
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156 }
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157 logger.debug("Sending RAW File as is.");
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158 try {
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159 ServletOps.sendFile(fileToLoad.getFile(), mt, response);
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160 } catch (FileOpException e) {
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161 e.printStackTrace();
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162 }
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163
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164 return;
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165 }
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166
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167
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168
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169 // if possible, send the image without actually having to transform it
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170 if(jobdeclaration.noTransformRequired()){
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171 logger.debug("Sending File as is.");
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172
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173 try {
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174 ServletOps.sendFile(fileToLoad.getFile(), null, response);
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175 } catch (FileOpException e) {
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176 e.printStackTrace();
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177 }
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178
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179 //logger.info("Done in "
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180 // + (System.currentTimeMillis() - startTime) + "ms");
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181 return;
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182 }
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183
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184
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185
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186
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187 OutputStream outputstream = null;
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188 try {
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189 outputstream = response.getOutputStream();
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190 } catch (IOException e1) {
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191 // TODO Auto-generated catch block
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192 e1.printStackTrace();
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193 logger.error(e1.getMessage());
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194 }
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195
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196
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197
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198
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199 if (! DigilibWorker.canRun()) {
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200 logger.error("Servlet overloaded!");
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201 try {
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202 response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
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203 } catch (IOException e) {
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204 e.printStackTrace();
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205 }
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206 return;
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207 }
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208
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209
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210
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211
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212
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213 DigilibWorker job=null;
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214 try {
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215
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216 long startTime = System.currentTimeMillis();
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217
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218 /* check permissions */
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219 if (useAuthorization) {
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220 // get a list of required roles (empty if no restrictions)
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221 List rolesRequired;
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222 try {
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223 rolesRequired = authOp.rolesForPath(jobdeclaration.getFilePath(), request);
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224 if (rolesRequired != null) {
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225 authlog.debug("Role required: " + rolesRequired);
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226 authlog.debug("User: " + request.getRemoteUser());
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227 // is the current request/user authorized?
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228 if (!authOp.isRoleAuthorized(rolesRequired, request)) {
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229 // send deny answer and abort
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230 throw new AuthOpException();
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231 }
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232 }
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233
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234 } catch (AuthOpException e) {
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235 // TODO Auto-generated catch block
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236 e.printStackTrace();
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237 }
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238 }
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239
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240
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241 job = new DigilibImageWorker(dlConfig,
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242 outputstream ,
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243 jobdeclaration.get_mimeType(),
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244 jobdeclaration.get_scaleQual(),
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245 jobdeclaration.getAsFloat("rot"),
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246 jobdeclaration.getAsFloat("cont"),
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247 jobdeclaration.getAsFloat("brgt"),
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248 jobdeclaration.get_paramRGBM(),
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249 jobdeclaration.get_paramRGBA(),
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250 jobdeclaration.get_fileToLoad(),
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501
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251 jobdeclaration.get_scaleXY(),
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252 jobdeclaration.get_outerUserImgArea(),
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253 jobdeclaration.get_innerUserImgArea(),
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254 minSubsample,
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255 jobdeclaration.get_wholeRotArea(),
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256 jobdeclaration.get_forceType(),
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257 jobdeclaration.get_hmir(),
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258 jobdeclaration.get_vmir());
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259
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260 job.run();
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261
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262 if (job.hasError()) {
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263 throw new ImageOpException(job.getError().toString());
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264 }
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265
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266 try {
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267 outputstream.flush();
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268 logger.debug("Job Processing Time: "+ (System.currentTimeMillis()-startTime) + "ms");
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269 } catch (IOException e) {
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270 e.printStackTrace();
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271 logger.error(e.getMessage());
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272 response.sendError(1);
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273 }
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274
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275
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276 } catch (IOException e) {
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277 // TODO Auto-generated catch block
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278 e.printStackTrace();
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279 logger.error(e.getClass()+": "+ e.getMessage());
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280 //response.sendError(1);
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281 } catch (ImageOpException e) {
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282 // TODO Auto-generated catch block
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283 e.printStackTrace();
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284 logger.error(e.getClass()+": "+ e.getMessage());
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285 //response.sendError(1);
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286 }
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287
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288
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289
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290
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291
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292 /*boolean errorMsgHtml = false;
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293
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294 if(jobdeclaration.hasOption("mo","errtxt")){
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295 errorMsgHtml = true;
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296 } else if (jobdeclaration.hasOption("mo","errimg")) {
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297 errorMsgHtml = true;
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298 }
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299
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300
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301
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302 */
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303
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304
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305 }
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306
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307
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308
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309 /**
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310 * Sends an error to the client as text or image.
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311 *
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312 * @param asHTML
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313 * @param type
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314 * @param msg
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315 * @param response
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316 */
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317 public void digilibError(boolean asHTML, int type, String msg,
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318 HttpServletResponse response) {
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319 try {
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320 File img = null;
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321 if (type == ERROR_AUTH) {
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322 if (msg == null) {
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323 msg = "ERROR: Unauthorized access!";
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324 }
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325 img = denyImgFile;
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326 } else if (type == ERROR_FILE) {
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327 if (msg == null) {
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328 msg = "ERROR: Image file not found!";
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329 }
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330 img = notfoundImgFile;
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331 } else {
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332 if (msg == null) {
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333 msg = "ERROR: Other image error!";
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334 }
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335 img = this.errorImgFile;
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336 }
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337 if (asHTML && (img != null)) {
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338 ServletOps.htmlMessage(msg, response);
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339 } else {
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340 ServletOps.sendFile(img, null, response);
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341 }
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342 } catch (IOException e) {
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343 logger.error("Error sending error!", e);
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344 }
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1
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345
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346 }
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1
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347
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500
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348 public static String getVersion(){
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349 return dlVersion;
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350 }
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351
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1
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352
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353 }
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