[jira] Commented: (NUTCH-643) ClassCastException in PdfParser on encrypted PDF with empty password
[
https://issues.apache.org/jira/browse/NUTCH-643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12671117#action_12671117
]
Andrzej Bialecki commented on NUTCH-643:
-
Fixed in rev. 741558, using CVS HEAD version of PDFBox 0.7.4 from SourceForge.
During tests on documents containing images I discovered that it's necessary to
add JAI libraries too - this unfortunately increased the size of the plugin.
ClassCastException in PdfParser on encrypted PDF with empty password
Key: NUTCH-643
URL: https://issues.apache.org/jira/browse/NUTCH-643
Project: Nutch
Issue Type: Bug
Components: fetcher
Affects Versions: 1.0.0
Environment: This problem affects the current trunk too.
Reporter: Guillaume Smet
Assignee: Andrzej Bialecki
Fix For: 1.0.0
Attachments: parse-pdf-PDFBox_upgrade.diff
Hi,
If a PDF document is encrypted with an empty password, the PdfParser should
decrypt it using the empty password.
This behaviour is implemented with the following code:
if (pdf.isEncrypted()) {
DocumentEncryption decryptor = new DocumentEncryption(pdf);
//Just try using the default password and move on
decryptor.decryptDocument();
}
It uses a deprecated API and moreover it seems there is a bug in PDFBox in
this deprecated API (we have a ClassCastException in PDFBox) as we have the
following error:
2008-08-07 19:15:56,860 WARN parse.pdf - General exception in PDF parser:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.pdfbox.encryption.DocumentEncryption.decryptDocument(DocumentEncryption.java:197)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.pdf.PdfParser.getParse(PdfParser.java:98)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.ParseUtil.parse(ParseUtil.java:82)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.output(Fetcher.java:336)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:178)
2008-08-07 19:15:56,874 WARN fetcher.Fetcher - Error parsing:
http://www2.culture.gouv.fr/deps/fr/stateurope071.pdf: failed(2,0): Can't be
handled as pdf document. java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
Using the new security API, we don't have any error parsing this document and
we can get its content:
if (pdf.isEncrypted()) {
// Just try using the default password and move
on
pdf.openProtection(new
StandardDecryptionMaterial());
}
I attached the patch fixing this problem: it works perfectly with the above
document and get rids of the deprecated API.
Regards,
--
Guillaume
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[jira] Commented: (NUTCH-643) ClassCastException in PdfParser on encrypted PDF with empty password
[
https://issues.apache.org/jira/browse/NUTCH-643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12671407#action_12671407
]
Hudson commented on NUTCH-643:
--
Integrated in Nutch-trunk #717 (See
[http://hudson.zones.apache.org/hudson/job/Nutch-trunk/717/])
ClassCastException in PDF parser, upgrade to unofficial PDFBox 0.7.4
ClassCastException in PdfParser on encrypted PDF with empty password
Key: NUTCH-643
URL: https://issues.apache.org/jira/browse/NUTCH-643
Project: Nutch
Issue Type: Bug
Components: fetcher
Affects Versions: 1.0.0
Environment: This problem affects the current trunk too.
Reporter: Guillaume Smet
Assignee: Andrzej Bialecki
Fix For: 1.0.0
Attachments: parse-pdf-PDFBox_upgrade.diff
Hi,
If a PDF document is encrypted with an empty password, the PdfParser should
decrypt it using the empty password.
This behaviour is implemented with the following code:
if (pdf.isEncrypted()) {
DocumentEncryption decryptor = new DocumentEncryption(pdf);
//Just try using the default password and move on
decryptor.decryptDocument();
}
It uses a deprecated API and moreover it seems there is a bug in PDFBox in
this deprecated API (we have a ClassCastException in PDFBox) as we have the
following error:
2008-08-07 19:15:56,860 WARN parse.pdf - General exception in PDF parser:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.pdfbox.encryption.DocumentEncryption.decryptDocument(DocumentEncryption.java:197)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.pdf.PdfParser.getParse(PdfParser.java:98)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.ParseUtil.parse(ParseUtil.java:82)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.output(Fetcher.java:336)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:178)
2008-08-07 19:15:56,874 WARN fetcher.Fetcher - Error parsing:
http://www2.culture.gouv.fr/deps/fr/stateurope071.pdf: failed(2,0): Can't be
handled as pdf document. java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
Using the new security API, we don't have any error parsing this document and
we can get its content:
if (pdf.isEncrypted()) {
// Just try using the default password and move
on
pdf.openProtection(new
StandardDecryptionMaterial());
}
I attached the patch fixing this problem: it works perfectly with the above
document and get rids of the deprecated API.
Regards,
--
Guillaume
--
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[jira] Commented: (NUTCH-643) ClassCastException in PdfParser on encrypted PDF with empty password
[
https://issues.apache.org/jira/browse/NUTCH-643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12668001#action_12668001
]
Doğacan Güney commented on NUTCH-643:
-
So... Can we commit this patch and pdfbox? It seems pdfbox is released under a
BSD license. Is it compatible with ASF license?
ClassCastException in PdfParser on encrypted PDF with empty password
Key: NUTCH-643
URL: https://issues.apache.org/jira/browse/NUTCH-643
Project: Nutch
Issue Type: Bug
Components: fetcher
Affects Versions: 1.0.0
Environment: This problem affects the current trunk too.
Reporter: Guillaume Smet
Attachments: parse-pdf-PDFBox_upgrade.diff
Hi,
If a PDF document is encrypted with an empty password, the PdfParser should
decrypt it using the empty password.
This behaviour is implemented with the following code:
if (pdf.isEncrypted()) {
DocumentEncryption decryptor = new DocumentEncryption(pdf);
//Just try using the default password and move on
decryptor.decryptDocument();
}
It uses a deprecated API and moreover it seems there is a bug in PDFBox in
this deprecated API (we have a ClassCastException in PDFBox) as we have the
following error:
2008-08-07 19:15:56,860 WARN parse.pdf - General exception in PDF parser:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.pdfbox.encryption.DocumentEncryption.decryptDocument(DocumentEncryption.java:197)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.pdf.PdfParser.getParse(PdfParser.java:98)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.ParseUtil.parse(ParseUtil.java:82)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.output(Fetcher.java:336)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:178)
2008-08-07 19:15:56,874 WARN fetcher.Fetcher - Error parsing:
http://www2.culture.gouv.fr/deps/fr/stateurope071.pdf: failed(2,0): Can't be
handled as pdf document. java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
Using the new security API, we don't have any error parsing this document and
we can get its content:
if (pdf.isEncrypted()) {
// Just try using the default password and move
on
pdf.openProtection(new
StandardDecryptionMaterial());
}
I attached the patch fixing this problem: it works perfectly with the above
document and get rids of the deprecated API.
Regards,
--
Guillaume
--
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[jira] Commented: (NUTCH-643) ClassCastException in PdfParser on encrypted PDF with empty password
[
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]
Guillaume Smet commented on NUTCH-643:
--
Hi Doğacan,
The problem isn't the license of PDFBox which is already included in Nutch.
It's more than PDFBox is on its way to become an Apache project (it's in the
incubator - see http://incubator.apache.org/pdfbox/) and it seems that you
can't include a library which is in the incubator.
So you can either wait for PDFBox to be a real Apache project or build a
development version of the latest PDFBox tree which is on sourceforge.net,
which is what I did (the problem is fixed in the sf.net tree) but you then have
a development version in the Nutch tree and not a stable release: I'm not sure
it's acceptable.
It's more a problem of release policy and release rules than a technical or
license problem.
--
Guillaume
ClassCastException in PdfParser on encrypted PDF with empty password
Key: NUTCH-643
URL: https://issues.apache.org/jira/browse/NUTCH-643
Project: Nutch
Issue Type: Bug
Components: fetcher
Affects Versions: 1.0.0
Environment: This problem affects the current trunk too.
Reporter: Guillaume Smet
Attachments: parse-pdf-PDFBox_upgrade.diff
Hi,
If a PDF document is encrypted with an empty password, the PdfParser should
decrypt it using the empty password.
This behaviour is implemented with the following code:
if (pdf.isEncrypted()) {
DocumentEncryption decryptor = new DocumentEncryption(pdf);
//Just try using the default password and move on
decryptor.decryptDocument();
}
It uses a deprecated API and moreover it seems there is a bug in PDFBox in
this deprecated API (we have a ClassCastException in PDFBox) as we have the
following error:
2008-08-07 19:15:56,860 WARN parse.pdf - General exception in PDF parser:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.pdfbox.encryption.DocumentEncryption.decryptDocument(DocumentEncryption.java:197)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.pdf.PdfParser.getParse(PdfParser.java:98)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.ParseUtil.parse(ParseUtil.java:82)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.output(Fetcher.java:336)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:178)
2008-08-07 19:15:56,874 WARN fetcher.Fetcher - Error parsing:
http://www2.culture.gouv.fr/deps/fr/stateurope071.pdf: failed(2,0): Can't be
handled as pdf document. java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
Using the new security API, we don't have any error parsing this document and
we can get its content:
if (pdf.isEncrypted()) {
// Just try using the default password and move
on
pdf.openProtection(new
StandardDecryptionMaterial());
}
I attached the patch fixing this problem: it works perfectly with the above
document and get rids of the deprecated API.
Regards,
--
Guillaume
--
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-
You can reply to this email to add a comment to the issue online.
[jira] Commented: (NUTCH-643) ClassCastException in PdfParser on encrypted PDF with empty password
[
https://issues.apache.org/jira/browse/NUTCH-643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12668015#action_12668015
]
Andrzej Bialecki commented on NUTCH-643:
-
+1. Yes, it's compatible.
ClassCastException in PdfParser on encrypted PDF with empty password
Key: NUTCH-643
URL: https://issues.apache.org/jira/browse/NUTCH-643
Project: Nutch
Issue Type: Bug
Components: fetcher
Affects Versions: 1.0.0
Environment: This problem affects the current trunk too.
Reporter: Guillaume Smet
Attachments: parse-pdf-PDFBox_upgrade.diff
Hi,
If a PDF document is encrypted with an empty password, the PdfParser should
decrypt it using the empty password.
This behaviour is implemented with the following code:
if (pdf.isEncrypted()) {
DocumentEncryption decryptor = new DocumentEncryption(pdf);
//Just try using the default password and move on
decryptor.decryptDocument();
}
It uses a deprecated API and moreover it seems there is a bug in PDFBox in
this deprecated API (we have a ClassCastException in PDFBox) as we have the
following error:
2008-08-07 19:15:56,860 WARN parse.pdf - General exception in PDF parser:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.pdfbox.encryption.DocumentEncryption.decryptDocument(DocumentEncryption.java:197)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.pdf.PdfParser.getParse(PdfParser.java:98)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.ParseUtil.parse(ParseUtil.java:82)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.output(Fetcher.java:336)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:178)
2008-08-07 19:15:56,874 WARN fetcher.Fetcher - Error parsing:
http://www2.culture.gouv.fr/deps/fr/stateurope071.pdf: failed(2,0): Can't be
handled as pdf document. java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
Using the new security API, we don't have any error parsing this document and
we can get its content:
if (pdf.isEncrypted()) {
// Just try using the default password and move
on
pdf.openProtection(new
StandardDecryptionMaterial());
}
I attached the patch fixing this problem: it works perfectly with the above
document and get rids of the deprecated API.
Regards,
--
Guillaume
--
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-
You can reply to this email to add a comment to the issue online.
[jira] Commented: (NUTCH-643) ClassCastException in PdfParser on encrypted PDF with empty password
[
https://issues.apache.org/jira/browse/NUTCH-643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12668018#action_12668018
]
Andrzej Bialecki commented on NUTCH-643:
-
(sorry Guillame, missed your comment) - there is an existing precedent in Nutch
source tree, namely the Tika library, which is still incubating. This practice
is however frowned upon ;) I'm ok with using the latest SF.net version of
PDFBox built from sources, provided we include a notice about the SVN revision
of the library. This is probably better than using the version from the
incubator and make the legal situation worse.
ClassCastException in PdfParser on encrypted PDF with empty password
Key: NUTCH-643
URL: https://issues.apache.org/jira/browse/NUTCH-643
Project: Nutch
Issue Type: Bug
Components: fetcher
Affects Versions: 1.0.0
Environment: This problem affects the current trunk too.
Reporter: Guillaume Smet
Attachments: parse-pdf-PDFBox_upgrade.diff
Hi,
If a PDF document is encrypted with an empty password, the PdfParser should
decrypt it using the empty password.
This behaviour is implemented with the following code:
if (pdf.isEncrypted()) {
DocumentEncryption decryptor = new DocumentEncryption(pdf);
//Just try using the default password and move on
decryptor.decryptDocument();
}
It uses a deprecated API and moreover it seems there is a bug in PDFBox in
this deprecated API (we have a ClassCastException in PDFBox) as we have the
following error:
2008-08-07 19:15:56,860 WARN parse.pdf - General exception in PDF parser:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.pdfbox.encryption.DocumentEncryption.decryptDocument(DocumentEncryption.java:197)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.pdf.PdfParser.getParse(PdfParser.java:98)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.ParseUtil.parse(ParseUtil.java:82)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.output(Fetcher.java:336)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:178)
2008-08-07 19:15:56,874 WARN fetcher.Fetcher - Error parsing:
http://www2.culture.gouv.fr/deps/fr/stateurope071.pdf: failed(2,0): Can't be
handled as pdf document. java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
Using the new security API, we don't have any error parsing this document and
we can get its content:
if (pdf.isEncrypted()) {
// Just try using the default password and move
on
pdf.openProtection(new
StandardDecryptionMaterial());
}
I attached the patch fixing this problem: it works perfectly with the above
document and get rids of the deprecated API.
Regards,
--
Guillaume
--
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-
You can reply to this email to add a comment to the issue online.
[jira] Commented: (NUTCH-643) ClassCastException in PdfParser on encrypted PDF with empty password
[
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]
Doğacan Güney commented on NUTCH-643:
-
Right, we should update tika to 0.2 (post-incubation) too before releasing 1.0
:) I actually would do that a while back, but then I know nothing about tika,
so worried about breaking stuff.
ClassCastException in PdfParser on encrypted PDF with empty password
Key: NUTCH-643
URL: https://issues.apache.org/jira/browse/NUTCH-643
Project: Nutch
Issue Type: Bug
Components: fetcher
Affects Versions: 1.0.0
Environment: This problem affects the current trunk too.
Reporter: Guillaume Smet
Attachments: parse-pdf-PDFBox_upgrade.diff
Hi,
If a PDF document is encrypted with an empty password, the PdfParser should
decrypt it using the empty password.
This behaviour is implemented with the following code:
if (pdf.isEncrypted()) {
DocumentEncryption decryptor = new DocumentEncryption(pdf);
//Just try using the default password and move on
decryptor.decryptDocument();
}
It uses a deprecated API and moreover it seems there is a bug in PDFBox in
this deprecated API (we have a ClassCastException in PDFBox) as we have the
following error:
2008-08-07 19:15:56,860 WARN parse.pdf - General exception in PDF parser:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.pdfbox.encryption.DocumentEncryption.decryptDocument(DocumentEncryption.java:197)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.pdf.PdfParser.getParse(PdfParser.java:98)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.ParseUtil.parse(ParseUtil.java:82)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.output(Fetcher.java:336)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:178)
2008-08-07 19:15:56,874 WARN fetcher.Fetcher - Error parsing:
http://www2.culture.gouv.fr/deps/fr/stateurope071.pdf: failed(2,0): Can't be
handled as pdf document. java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
Using the new security API, we don't have any error parsing this document and
we can get its content:
if (pdf.isEncrypted()) {
// Just try using the default password and move
on
pdf.openProtection(new
StandardDecryptionMaterial());
}
I attached the patch fixing this problem: it works perfectly with the above
document and get rids of the deprecated API.
Regards,
--
Guillaume
--
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-
You can reply to this email to add a comment to the issue online.
[jira] Commented: (NUTCH-643) ClassCastException in PdfParser on encrypted PDF with empty password
[
https://issues.apache.org/jira/browse/NUTCH-643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12623519#action_12623519
]
Andrzej Bialecki commented on NUTCH-643:
-
AFAIK we can't include libraries from projects undergoing incubation, because
their legal status is not fully confirmed by ASF. I think we have to wait until
PDFBox comes out from the incubation, or to use the latest non-Apache version
(which unfortunately doesn't yet address this problem).
ClassCastException in PdfParser on encrypted PDF with empty password
Key: NUTCH-643
URL: https://issues.apache.org/jira/browse/NUTCH-643
Project: Nutch
Issue Type: Bug
Components: fetcher
Affects Versions: 1.0.0
Environment: This problem affects the current trunk too.
Reporter: Guillaume Smet
Attachments: parse-pdf-PDFBox_upgrade.diff
Hi,
If a PDF document is encrypted with an empty password, the PdfParser should
decrypt it using the empty password.
This behaviour is implemented with the following code:
if (pdf.isEncrypted()) {
DocumentEncryption decryptor = new DocumentEncryption(pdf);
//Just try using the default password and move on
decryptor.decryptDocument();
}
It uses a deprecated API and moreover it seems there is a bug in PDFBox in
this deprecated API (we have a ClassCastException in PDFBox) as we have the
following error:
2008-08-07 19:15:56,860 WARN parse.pdf - General exception in PDF parser:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.pdfbox.encryption.DocumentEncryption.decryptDocument(DocumentEncryption.java:197)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.pdf.PdfParser.getParse(PdfParser.java:98)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.parse.ParseUtil.parse(ParseUtil.java:82)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.output(Fetcher.java:336)
2008-08-07 19:15:56,862 WARN parse.pdf - at
org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:178)
2008-08-07 19:15:56,874 WARN fetcher.Fetcher - Error parsing:
http://www2.culture.gouv.fr/deps/fr/stateurope071.pdf: failed(2,0): Can't be
handled as pdf document. java.lang.ClassCastException:
org.pdfbox.pdmodel.encryption.PDEncryptionDictionary cannot be cast to
org.pdfbox.pdmodel.encryption.PDStandardEncryption
Using the new security API, we don't have any error parsing this document and
we can get its content:
if (pdf.isEncrypted()) {
// Just try using the default password and move
on
pdf.openProtection(new
StandardDecryptionMaterial());
}
I attached the patch fixing this problem: it works perfectly with the above
document and get rids of the deprecated API.
Regards,
--
Guillaume
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