Thanks Richard Ramey for his donation, it is the first 10 dollar for the PdfCrypt.
BTW, If you do not want to download PdfCrypt, or you do not have windows system, but still want to remove the PDF Password(either user password or owner password) and stricts(print, copy and so on), please feel free to try my free Remove PDF Password Online solution hosted on Google App Engine(GAE/J), it bases on modified iText 2.1.7.
Nick Johnson said,
Currently, API calls are limited to 1MB, but requests and responses are limited to 10M. If you want to permit larger files, you could split them up into chunks and store them in the datastore. The 30 second request limit applies only to the time your code spends processing the request, not time sent receiving the request or sending the response.
A large file API is on our roadmap, which will make handling large files from users much easier.
I offer the UrlFetch function in my PDF Password Remover Online application, but I do not want to let it only manipulate no more 1M PDF, after some study, I got the solution, let UrlFetch API download no more 1M data each time, but repeat many times until all data downloaded, of course, there still a limit, 30 second request limit.
public static byte[] download(String url) throws IOException, InterruptedException {
ArrayList
HttpURLConnection httpConn = null;
int seg=1024*1000;
int startPosition=0;
try {
URL u = new URL(url);
for(;;)
{
int endPosition=startPosition+seg;
httpConn = (HttpURLConnection) u.openConnection();
httpConn.setRequestMethod("GET");
httpConn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14");
httpConn.setRequestProperty("Range", "bytes=" + startPosition + "-"+endPosition);
httpConn.connect();
InputStream in = httpConn.getInputStream();
byte[] b=Util.toByteArray(in);//IOUtils.toByteArray(in);
al.add(b);
startPosition+=b.length;
if(b.length
}
ArrayList
for(byte[] b : al)
{
for (int i = 0; i
}
}
return Util.saveBytesArrayListTobytesArray(temp);
} finally {
httpConn.disconnect();
}
}
After made iText worked on Google App Engine, I built Another application, Remove PDF Password Online. It bases on iText 2.1.7 but with many modification.
the main features of pdfdecrypt online are,
- remove restrictions on any secured PDF document (you should have the right to do it, for example, if you forgot the password). Any Acrobat version up to 9 is supported, even with 128-bit AES or 128-bit RC4 encryption. PDF restrictions removal is an instant process. Unlocked file can be opened in any PDF viewer without any restrictions so you may edit/copy/print it.
- remove the PDF open password. Decryption of the file with password for opening is guaranteed for PDF files Any Acrobat version up to 9 is supported, even with 128-bit AES or 128-bit RC4 encryption,but you must know the password first.
It supports upload PDF documents from your disk and give a PDF url.
If you like it, just have a try now, it is free.