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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.FileOps;
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26 import digilib.io.ImageFile;
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27 import digilib.io.ImageFileset;
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28
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29 public class Scaler extends RequestHandler {
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30
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31 /** digilib servlet version (for all components) */
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32 public static final String dlVersion = "1.7.0b";
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33
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34 /** general error code */
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35 public static final int ERROR_UNKNOWN = 0;
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36
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37 /** error code for authentication error */
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38 public static final int ERROR_AUTH = 1;
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39
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40 /** error code for file operation error */
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41 public static final int ERROR_FILE = 2;
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42
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43 /** error code for image operation error */
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44 public static final int ERROR_IMAGE = 3;
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45
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46 /** DocuDirCache instance */
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47 DocuDirCache dirCache;
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48
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49 /** authentication error image file */
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50 File denyImgFile;
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51
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52 /** image error image file */
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53 File errorImgFile;
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54
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55 /** not found error image file */
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56 File notfoundImgFile;
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57
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58 /** subsampling before scaling */
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59 float minSubsample = 2f;
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60
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61 /** send files as is? */
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62 boolean sendFileAllowed = true;
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63
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64 /** default scaling quality */
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65 int defaultQuality = 1;
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66
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67 /** DigilibConfiguration instance */
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68 DigilibConfiguration dlConfig;
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69
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70 /** use authorization database */
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71 boolean useAuthorization = true;
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72
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73 /** AuthOps instance */
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74 AuthOps authOp;
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75
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76 // EXPRIMENTAL
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77 /** try to enlarge cropping area for "oblique" angles */
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78 boolean wholeRotArea = false;
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79
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80 /**
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81 * Initialisation on first run.
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82 *
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83 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig)
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84 */
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85 public void init(ServletConfig config) throws ServletException {
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86 super.init(config);
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87
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88 System.out
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89 .println("***** Digital Image Library Image Scaler Servlet (version "
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90 + dlVersion + ") *****");
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91 // say hello in the log file
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92 logger
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93 .info("***** Digital Image Library Image Scaler Servlet (version "
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94 + dlVersion + ") *****");
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95
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96 // get our ServletContext
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97 ServletContext context = config.getServletContext();
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98 // see if there is a Configuration instance
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99 dlConfig = (DigilibConfiguration) context
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100 .getAttribute("digilib.servlet.configuration");
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101 if (dlConfig == null) {
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102 // no Configuration
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103 throw new ServletException("No Configuration!");
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104 }
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105 // set our AuthOps
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106 useAuthorization = dlConfig.getAsBoolean("use-authorization");
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107 authOp = (AuthOps) dlConfig.getValue("servlet.auth.op");
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108
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109 // DocuDirCache instance
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110 dirCache = (DocuDirCache) dlConfig.getValue("servlet.dir.cache");
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111 denyImgFile = ServletOps.getFile((File) dlConfig.getValue("denied-image"), config);
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112 errorImgFile = ServletOps.getFile((File) dlConfig.getValue("error-image"), config);
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113 notfoundImgFile = ServletOps.getFile((File) dlConfig.getValue("notfound-image"), config);
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114 sendFileAllowed = dlConfig.getAsBoolean("sendfile-allowed");
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115 minSubsample = dlConfig.getAsFloat("subsample-minimum");
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116 defaultQuality = dlConfig.getAsInt("default-quality");
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117 }
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118
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119 @Override
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120 public void processRequest(HttpServletRequest request,
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121 HttpServletResponse response) throws ServletException, ImageOpException {
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122
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123
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124 if (dlConfig == null) {
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125 throw new ServletException("ERROR: No Configuration!");
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126 }
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127
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128 accountlog.debug("request: " + request.getQueryString());
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129 logger.debug("request: " + request.getQueryString());
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130
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131
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132
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133 // define the job information
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134 ImageJobInformation jobdeclaration = new ImageJobInformation();
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135
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136 jobdeclaration.setWithRequest(request);
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137 jobdeclaration.setConfig(dlConfig);
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138
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139
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140
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141
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142 // TODO check, if file can be sent without transformations
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143
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144
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145
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146
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147 OutputStream outputstream = null;
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148 try {
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149 outputstream = response.getOutputStream();
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150 } catch (IOException e1) {
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151 // TODO Auto-generated catch block
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152 e1.printStackTrace();
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153 logger.error(e1.getMessage());
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154 }
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155
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156
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157 DigilibWorker job=null;
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158 try {
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159
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160 /* logger.debug(outputstream.toString());
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161 logger.debug(jobdeclaration.get_mimeType().toString());
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162 logger.debug(jobdeclaration.get_scaleQual().toString());
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163 logger.debug(jobdeclaration.getAsFloat("rot"));
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164 logger.debug(jobdeclaration.getAsFloat("cont"));
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165 logger.debug(jobdeclaration.getAsFloat("brgt"));
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166 logger.debug(jobdeclaration.get_paramRGBM().toString());
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167 logger.debug(jobdeclaration.get_paramRGBA().toString());
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168 logger.debug("fileToLoad " + jobdeclaration.get_fileToLoad().toString());
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169 logger.debug("scaleXY " + jobdeclaration.get_scaleXY());
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170 logger.debug("get_outerUserImgArea " + jobdeclaration.get_outerUserImgArea().toString());
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171 logger.debug("get_innerUserImgArea " + jobdeclaration.get_innerUserImgArea().toString());
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172 logger.debug("minSubsample " + minSubsample);
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173 logger.debug("get_wholeRotArea " + jobdeclaration.get_wholeRotArea());
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174 logger.debug("get_forceType "+jobdeclaration.get_forceType()); */
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175
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176 float scaleXY = jobdeclaration.get_scaleXY();
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177
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178 long startTime = System.currentTimeMillis();
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179
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180
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181 job = new DigilibImageWorker(dlConfig,
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182 outputstream ,
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183 jobdeclaration.get_mimeType(),
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184 jobdeclaration.get_scaleQual(),
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185 //jobdeclaration,
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186 jobdeclaration.getAsFloat("rot"),
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187 jobdeclaration.getAsFloat("cont"),
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188 jobdeclaration.getAsFloat("brgt"),
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189 jobdeclaration.get_paramRGBM(),
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190 jobdeclaration.get_paramRGBA(),
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191 jobdeclaration.get_fileToLoad(),
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192 scaleXY,
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193 jobdeclaration.get_outerUserImgArea(),
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194 jobdeclaration.get_innerUserImgArea(),
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195 minSubsample,
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196 jobdeclaration.get_wholeRotArea(),
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197 jobdeclaration.get_forceType(),
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198 jobdeclaration.get_hmir(),
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199 jobdeclaration.get_vmir());
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200
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201 job.run();
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202
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203 if (job.hasError()) {
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204 throw new ImageOpException(job.getError().toString());
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205 }
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206
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207 try {
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208 outputstream.flush();
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209 logger.debug("Job Processing Time: "+ (System.currentTimeMillis()-startTime) + "ms");
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210 } catch (IOException e) {
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211 // TODO Auto-generated catch block
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212 e.printStackTrace();
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213 logger.error(e.getMessage());
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214 response.sendError(1);
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215 }
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216
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217
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218 } catch (IOException e) {
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219 // TODO Auto-generated catch block
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220 e.printStackTrace();
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221 logger.error(e.getClass()+": "+ e.getMessage());
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222 //response.sendError(1);
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223 } catch (ImageOpException e) {
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224 // TODO Auto-generated catch block
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225 e.printStackTrace();
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226 logger.error(e.getClass()+": "+ e.getMessage());
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227 //response.sendError(1);
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228 }
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229
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230
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231
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232
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233
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234 /*boolean errorMsgHtml = false;
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235
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236 if(jobdeclaration.hasOption("mo","errtxt")){
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237 errorMsgHtml = true;
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238 } else if (jobdeclaration.hasOption("mo","errimg")) {
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239 errorMsgHtml = true;
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240 }
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241
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242
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243
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244 */
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245
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246
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247 }
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248
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249
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250
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251 /**
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252 * Sends an error to the client as text or image.
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253 *
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254 * @param asHTML
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255 * @param type
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256 * @param msg
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257 * @param response
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258 */
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259 public void digilibError(boolean asHTML, int type, String msg,
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260 HttpServletResponse response) {
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261 try {
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262 File img = null;
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263 if (type == ERROR_AUTH) {
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264 if (msg == null) {
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265 msg = "ERROR: Unauthorized access!";
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266 }
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267 img = denyImgFile;
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268 } else if (type == ERROR_FILE) {
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269 if (msg == null) {
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270 msg = "ERROR: Image file not found!";
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271 }
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272 img = notfoundImgFile;
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273 } else {
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274 if (msg == null) {
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275 msg = "ERROR: Other image error!";
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276 }
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277 img = this.errorImgFile;
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278 }
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279 if (asHTML && (img != null)) {
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280 ServletOps.htmlMessage(msg, response);
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281 } else {
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282 ServletOps.sendFile(img, null, response);
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283 }
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284 } catch (IOException e) {
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285 logger.error("Error sending error!", e);
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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 public static String getVersion(){
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291 return dlVersion;
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292 }
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293
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294
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295 }
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