Source code for functions to use libpoppler to validate that a bytea contains a valid PDF document and to extract text from a bytea containing a PDF document. The source code will likely need to be modified based on the server's version of poppler.
The Extract text from bytea containing a PDFproject is a PostgreSQL Community project that is a part of the pgFoundry.
The pgFoundry page for the project is at http://pgfoundry.org/projects/pdftotext, where you can find downloads, documentation, bug reports, mailing lists, and a whole lot more.
