/*
* Copyright (c) 2009 Nicholas C. Zakas. All rights reserved.
* http://www.nczonline.net/
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package net.nczonline.web.cssembed;
import jargs.gnu.CmdLineParser;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.ByteArrayOutputStream;
import java.io.Reader;
import java.io.Writer;
import java.nio.charset.Charset;
public class CSSEmbed {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
//default settings
boolean verbose = false;
String charset = null;
String outputFilename = null;
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
Writer out = null;
Reader in = null;
String root;
int options = CSSURLEmbedder.DATAURI_OPTION;
//initialize command line parser
CmdLineParser parser = new CmdLineParser();
CmdLineParser.Option verboseOpt = parser.addBooleanOption('v', "verbose");
CmdLineParser.Option helpOpt = parser.addBooleanOption('h', "help");
CmdLineParser.Option charsetOpt = parser.addStringOption("charset");
CmdLineParser.Option rootOpt = parser.addStringOption("root");
CmdLineParser.Option outputFilenameOpt = parser.addStringOption('o', "output");
CmdLineParser.Option mhtmlOpt = parser.addBooleanOption("mhtml");
CmdLineParser.Option mhtmlRootOpt = parser.addStringOption("mhtmlroot");
CmdLineParser.Option skipMissingOpt = parser.addBooleanOption("skip-missing");
CmdLineParser.Option uriLengthOpt = parser.addIntegerOption('u', "maxuri");
try {
//parse the arguments
parser.parse(args);
//figure out if the help option has been executed
Boolean help = (Boolean) parser.getOptionValue(helpOpt);
if (help != null && help.booleanValue()) {
usage();
System.exit(0);
}
//determine boolean options
verbose = parser.getOptionValue(verboseOpt) != null;
//check for charset
charset = (String) parser.getOptionValue(charsetOpt);
if (charset == null || !Charset.isSupported(charset)) {
charset = System.getProperty("file.encoding");
if (charset == null) {
charset = "UTF-8";
}
if (verbose) {
System.err.println("\n[INFO] Using charset " + charset);
}
}
//get the file arguments
String[] fileArgs = parser.getRemainingArgs();
String inputFilename = null;
//if no file is given, use stdin
if (fileArgs.length == 0){
in = new InputStreamReader(System.in, charset);
} else {
//only the first filename is used
inputFilename = fileArgs[0];
in = new InputStreamReader(new FileInputStream(inputFilename), charset);
}
//determine if MHTML mode is on
boolean mhtml = parser.getOptionValue(mhtmlOpt) != null;
if(mhtml){
options = CSSURLEmbedder.MHTML_OPTION;
}
String mhtmlRoot = (String) parser.getOptionValue(mhtmlRootOpt);
if (mhtml && mhtmlRoot == null){
throw new Exception("Must use --mhtmlroot when using --mhtml.");
}
int maxurilength = 0;
Integer uriOption = (Integer) parser.getOptionValue(uriLengthOpt);
if (uriOption != null){
maxurilength = uriOption.intValue();
if (maxurilength < 0){
maxurilength = 0;
}
}
//are missing files ok?
boolean skipMissingFiles = parser.getOptionValue(skipMissingOpt) != null;
if(skipMissingFiles) {
options = options | CSSURLEmbedder.SKIP_MISSING_OPTION;
}
CSSURLEmbedder embedder = new CSSURLEmbedder(in, options, verbose, maxurilength);
embedder.setMHTMLRoot(mhtmlRoot);
//close in case writing to the same file
in.close(); in = null;
//get root for relative URLs
root = (String) parser.getOptionValue(rootOpt);
if(root == null){
if (inputFilename != null) {
//no root specified, so get from input file
root = (new File(inputFilename)).getCanonicalPath();
root = root.substring(0, root.lastIndexOf(File.separator));
} else {
throw new Exception("Must use --root when not specifying a filename.");
}
}
if (!root.endsWith(File.separator)){
root += File.separator;
}
if (verbose){
System.err.println("[INFO] Using '" + root + "' as root for relative file paths.");
}
//get output filename
outputFilename = (String) parser.getOptionValue(outputFilenameOpt);
if (outputFilename == null) {
if (verbose){
System.err.println("[INFO] No output file specified, defaulting to stdout.");
}
out = new OutputStreamWriter(System.out);
} else {
File outputFile = new File(outputFilename);
if (verbose){
System.err.println("[INFO] Output file is '" + outputFile.getAbsolutePath() + "'");
}
embedder.setFilename(outputFile.getName());
out = new OutputStreamWriter(bytes, charset);
}
//set verbose option
embedder.embedImages(out, root);
} catch (CmdLineParser.OptionException e) {
usage();
System.exit(1);
} catch (Exception e) {
System.err.println("[ERROR] " + e.getMessage());
if (verbose){
e.printStackTrace();
}
System.exit(1);
} finally {
if (out != null) {
try {
out.close();
bytes.writeTo(new FileOutputStream(outputFilename));
} catch (IOException e) {
System.err.println("[ERROR] " + e.getMessage());
if (verbose){
e.printStackTrace();
}
}
}
}
}
/**
* Outputs help information to the console.
*/
private static void usage() {
System.out.println(
"\nUsage: java -jar cssembed-x.y.z.jar [options] [input file]\n\n"
+ "Global Options\n"
+ " -h, --help Displays this information.\n"
+ " --charset Character set of the input file.\n"
+ " --mhtml Enable MHTML mode.\n"
+ " --mhtmlroot Use as the MHTML root for the file.\n"
+ " -v, --verbose Display informational messages and warnings.\n"
+ " --root Prepends to all relative URLs.\n"
+ " --skip-missing Don't throw an error for missing image files.\n"
+ " -u, --maxuri length Maximum length of data URI to use.\n"
+ " -o Place the output into . Defaults to stdout."
);
}
} |