使用 PI java 映射中的 Base64 有效负载从 url 获取 pdf 文件

Question

I am able to get a PDF file from an URL, encoding the stream into base 64 and send the string to a third party within a field of a XML file, but I have the next issue when I try to open the PDF file decode.

Cannot extract the embedded font 'ArialMT,Bold". Some characters may not display or print correctly.

Here is the code from Java Mapping in SAP PI 7.1:

    urlStr = "Insert here your url";
    StringBuffer data = new StringBuffer();
    URL url = new URL(urlStr);
    URLConnection conn = url.openConnection ();

    // Get the response
    BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    StringBuffer sb = new StringBuffer();
    String line;
    String carriagereturn = System.getProperty("line.separator");

    while ((line = rd.readLine()) != null)
    {
        trace.addWarning(line);
        sb.append(line);
        sb.append(carriagereturn);
    }

    rd.close();
    result = sb.toString();
} catch (Exception e){
    trace.addWarning(e.toString());
}

return org.apache.commons.codec.binary.Base64.encodeBase64String(result.getBytes());

I have read that it is not possible to retrieve the font when you execute an InputStreamReader because of the copyrights of the letter. Is it true?

Is there other any possibility to embed the font afterwards using iText library or similar?

Answer 1

This may happens if the font was not embeded in the PDF during creation, and you do not have the same exact font on the system where you open the pdf.

Is the pdf generated using itext ? in this case, this answer could help you. otherwise, try putting the font in your system font directory.

Edit : as for the second question, there is a small demo program to embed a font in an existing pdf file where the font is not embeded here