comunicapiv3/src/utils/pdf_utils.rs

//! # PDF utilities
//!
//! @author Pierre Hubert

use pdf::backend::Backend;

use crate::data::error::{ExecError, ResultBoxError};

/// Check out whether a PDF is a valid PDF or not, by trying to open it
pub fn is_valid_pdf(file: &bytes::Bytes) -> ResultBoxError<bool> {
    let backend = file.to_vec();

    match backend.read_xref_table_and_trailer() {
        Ok((refs, _)) => {
            if refs.is_empty() {
                Err(ExecError::boxed_string(format!("Detected a PDF with 0 references (file size: {})!", file.len())))
            } else {
                Ok(true)
            }
        }

        Err(e) => {
            println!("Error while parsing PDF: {}", e);
            Ok(false)
        }
    }
}