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https://issues.apache.org/jira/browse/PDFBOX-55?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12666318#action_12666318
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Tom Jackson commented on PDFBOX-55:
-----------------------------------
I ran into cases where an illegal hex character (0x00) would slip into the text
output I was writing to XML, as well.
The characters less than/equal to 7 and greater than/equal to 127 aren't
accepted by XML. That's a limitation of XML, not PDFBox. Even so, to correct
the situation, here is my C# code that I use that will accept a string and send
out a scrubbed string of the input, giving you only characters #8-126, that you
can use after you get the string PDFBox returns, but before you send your text
string to XML via XmlWriter. You would invoke a line similar to string
myContent = charScrubber(pdfboxContent), and then write "myContent" into your
XML file, to use this function:
/// <summary>
/// This will parse a string and only return characters
/// as a concatenated string if they are UTF-8 compliant.
/// Author: Tom Jackson
/// </summary>
/// <param name="content">A string variable provided for
parsing.</param>
/// <returns>The same string variable, minus characters that are
/// not UTF-8 compliant.</returns>
private static string charScrubber(string content)
{
StringBuilder sbTemp = new StringBuilder(content.Length);
foreach (char currentChar in content)
{
if (currentChar > 7 && currentChar < 127)
{
sbTemp.Append(currentChar);
}
}
content = sbTemp.ToString();
return content;
}
Enjoy.
-Tom
> Invalid character while extracting text from a chinese pdf
> ----------------------------------------------------------
>
> Key: PDFBOX-55
> URL: https://issues.apache.org/jira/browse/PDFBOX-55
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
>
> [imported from SourceForge]
> http://sourceforge.net/tracker/index.php?group_id=78314&atid=552832&aid=1185058
> Originally submitted by seblaunay on 2005-04-18 01:59.
> First, thanks for this wonderful api.
> I have a problem extracting text from a pdf document
> provided with adobe acrobat reader : ENUtxt.pdf.
> The pdf contains text with chinese fonts which cannot
> be extracted.
> But, it contains also this text (extract with xpdf or
> acrobat reader) :
> ---------------------------------------
> Lorem ipsum dolor
> ad minim
> ---------------------------------------
> The problem is i obtain on my Writer with
> PDFTextStripper.WriteText something like this :
> ---------------------------------------
> -PSFNJQTVNEPMPS
> BENJOJNWFSOJBNôH
> ---------------------------------------
> And between this valid characters, there are these
> invalid characters :
> 0x0, 0x1, 0x5, 0x6, 0x18.
> Because, i sax the content of a document into a xml,
> the resulting xml is not valid because it contains
> invalid characters...
> [attachment on SourceForge]
> http://sourceforge.net/tracker/download.php?group_id=78314&atid=552832&aid=1185058&file_id=130664
> ENUtxt.pdf (application/pdf), 7582 bytes
> The pdf used
> [comment on SourceForge]
> Originally sent by seblaunay.
> Logged In: YES
> user_id=1261395
> Document to test added.
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