supported/Epub.java

   1 package be.nikiroo.fanfix.supported;
   2
   3 import java.io.File;
   4 import java.io.IOException;
   5 import java.io.InputStream;
   6 import java.net.URISyntaxException;
   7 import java.net.URL;
   8 import java.net.URLDecoder;
   9 import java.util.ArrayList;
  10 import java.util.zip.ZipEntry;
  11 import java.util.zip.ZipInputStream;
  12
  13 import org.jsoup.nodes.Document;
  14
  15 import be.nikiroo.fanfix.Instance;
  16 import be.nikiroo.fanfix.data.MetaData;
  17 import be.nikiroo.utils.IOUtils;
  18 import be.nikiroo.utils.Image;
  19 import be.nikiroo.utils.StringUtils;
  20 import be.nikiroo.utils.streams.MarkableFileInputStream;
  21
  22 /**
  23  * Support class for EPUB files created with this program (as we need some
  24  * metadata available in those we create).
  25  *
  26  * @author niki
  27  */
  28 class Epub extends InfoText {
  29         private MetaData meta;
  30         private File tmpDir;
  31         private String desc;
  32
  33         private URL fakeSource;
  34         private InputStream fakeIn;
  35
  36         public File getSourceFileOriginal() {
  37                 return super.getSourceFile();
  38         }
  39
  40         @Override
  41         protected File getSourceFile() {
  42                 try {
  43                         return new File(fakeSource.toURI());
  44                 } catch (URISyntaxException e) {
  45                         Instance.getTraceHandler()
  46                                         .error(new IOException(
  47                                                         "Cannot get the source file from the info-text URL",
  48                                                         e));
  49                 }
  50
  51                 return null;
  52         }
  53
  54         @Override
  55         protected InputStream getInput() {
  56                 if (fakeIn != null) {
  57                         try {
  58                                 fakeIn.reset();
  59                         } catch (IOException e) {
  60                                 Instance.getTraceHandler()
  61                                                 .error(new IOException(
  62                                                                 "Cannot reset the Epub Text stream", e));
  63                         }
  64
  65                         return fakeIn;
  66                 }
  67
  68                 return null;
  69         }
  70
  71         @Override
  72         protected boolean supports(URL url) {
  73                 return url.getPath().toLowerCase().endsWith(".epub");
  74         }
  75
  76         @Override
  77         protected MetaData getMeta() throws IOException {
  78                 return meta;
  79         }
  80
  81         @Override
  82         protected Document loadDocument(URL source) throws IOException {
  83                 super.loadDocument(source); // prepares super.getSourceFile() and
  84                                                                         // super.getInput()
  85
  86                 InputStream in = super.getInput();
  87                 ZipInputStream zipIn = null;
  88                 try {
  89                         zipIn = new ZipInputStream(in);
  90                         tmpDir = Instance.getTempFiles().createTempDir(
  91                                         "fanfic-reader-parser");
  92                         File tmp = new File(tmpDir, "file.txt");
  93                         File tmpInfo = new File(tmpDir, "file.info");
  94
  95                         fakeSource = tmp.toURI().toURL();
  96                         Image cover = null;
  97
  98                         String url;
  99                         try {
 100                                 url = getSource().toURI().toURL().toString();
 101                         } catch (URISyntaxException e1) {
 102                                 url = getSource().toString();
 103                         }
 104                         String title = null;
 105                         String author = null;
 106
 107                         for (ZipEntry entry = zipIn.getNextEntry(); entry != null; entry = zipIn
 108                                         .getNextEntry()) {
 109                                 if (!entry.isDirectory()
 110                                                 && entry.getName().startsWith(getDataPrefix())) {
 111                                         String entryLName = entry.getName().toLowerCase();
 112
 113                                         boolean imageEntry = false;
 114                                         for (String ext : bsImages.getImageExt(false)) {
 115                                                 if (entryLName.endsWith(ext)) {
 116                                                         imageEntry = true;
 117                                                 }
 118                                         }
 119
 120                                         if (entry.getName().equals(getDataPrefix() + "version")) {
 121                                                 // Nothing to do for now ("first"
 122                                                 // version is 3.0)
 123                                         } else if (entryLName.endsWith(".info")) {
 124                                                 // Info file
 125                                                 IOUtils.write(zipIn, tmpInfo);
 126                                         } else if (imageEntry) {
 127                                                 // Cover
 128                                                 if (getCover()) {
 129                                                         try {
 130                                                                 cover = new Image(zipIn);
 131                                                         } catch (Exception e) {
 132                                                                 Instance.getTraceHandler().error(e);
 133                                                         }
 134                                                 }
 135                                         } else if (entry.getName().equals(getDataPrefix() + "URL")) {
 136                                                 String[] descArray = StringUtils
 137                                                                 .unhtml(IOUtils.readSmallStream(zipIn)).trim()
 138                                                                 .split("\n");
 139                                                 if (descArray.length > 0) {
 140                                                         url = descArray[0].trim();
 141                                                 }
 142                                         } else if (entry.getName().equals(
 143                                                         getDataPrefix() + "SUMMARY")) {
 144                                                 String[] descArray = StringUtils
 145                                                                 .unhtml(IOUtils.readSmallStream(zipIn)).trim()
 146                                                                 .split("\n");
 147                                                 int skip = 0;
 148                                                 if (descArray.length > 1) {
 149                                                         title = descArray[0].trim();
 150                                                         skip = 1;
 151                                                         if (descArray.length > 2
 152                                                                         && descArray[1].startsWith("©")) {
 153                                                                 author = descArray[1].substring(1).trim();
 154                                                                 skip = 2;
 155                                                         }
 156                                                 }
 157                                                 this.desc = "";
 158                                                 for (int i = skip; i < descArray.length; i++) {
 159                                                         this.desc += descArray[i].trim() + "\n";
 160                                                 }
 161
 162                                                 this.desc = this.desc.trim();
 163                                         } else {
 164                                                 // Hopefully the data file
 165                                                 IOUtils.write(zipIn, tmp);
 166                                         }
 167                                 }
 168                         }
 169
 170                         if (requireInfo() && (!tmp.exists() || !tmpInfo.exists())) {
 171                                 throw new IOException(
 172                                                 "file not supported (maybe not created with this program or corrupt)");
 173                         }
 174
 175                         if (tmp.exists()) {
 176                                 this.fakeIn = new MarkableFileInputStream(tmp);
 177                         }
 178
 179                         if (tmpInfo.exists()) {
 180                                 meta = InfoReader.readMeta(tmpInfo, true);
 181                                 tmpInfo.delete();
 182                         } else {
 183                                 if (title == null || title.isEmpty()) {
 184                                         title = getSourceFileOriginal().getName();
 185                                         if (title.toLowerCase().endsWith(".cbz")) {
 186                                                 title = title.substring(0, title.length() - 4);
 187                                         }
 188                                         title = URLDecoder.decode(title, "UTF-8").trim();
 189                                 }
 190
 191                                 meta = new MetaData();
 192                                 meta.setLang("en");
 193                                 meta.setTags(new ArrayList<String>());
 194                                 meta.setSource(getType().getSourceName());
 195                                 meta.setUuid(url);
 196                                 meta.setUrl(url);
 197                                 meta.setTitle(title);
 198                                 meta.setAuthor(author);
 199                                 meta.setImageDocument(isImagesDocumentByDefault());
 200                         }
 201
 202                         if (meta.getCover() == null) {
 203                                 if (cover != null) {
 204                                         meta.setCover(cover);
 205                                 } else {
 206                                         meta.setCover(InfoReader
 207                                                         .getCoverByName(getSourceFileOriginal().toURI()
 208                                                                         .toURL()));
 209                                 }
 210                         }
 211                 } finally {
 212                         if (zipIn != null) {
 213                                 zipIn.close();
 214                         }
 215                         if (in != null) {
 216                                 in.close();
 217                         }
 218                 }
 219
 220                 return null;
 221         }
 222
 223         @Override
 224         protected void close() {
 225                 if (tmpDir != null) {
 226                         IOUtils.deltree(tmpDir);
 227                 }
 228
 229                 tmpDir = null;
 230
 231                 super.close();
 232         }
 233
 234         protected String getDataPrefix() {
 235                 return "DATA/";
 236         }
 237
 238         protected boolean requireInfo() {
 239                 return true;
 240         }
 241
 242         protected boolean getCover() {
 243                 return true;
 244         }
 245
 246         protected boolean isImagesDocumentByDefault() {
 247                 return false;
 248         }
 249 }