如何用nodejs压缩pdf文件？

Question

I have tried to compress using ghostscript but no luck. Anyone has any alternative that is free and working?

Answer 1

 var inputFile = req.body.path
    outputFilePath = Date.now() + "output" + path.extname(req.body.path);
    console.log(outputFilePath);
  
    exec(
      `gs \ -q -dNOPAUSE -dBATCH -dSAFER \ -sDEVICE=pdfwrite \ -dCompatibilityLevel=1.3 \ -dPDFSETTINGS=/ebook \ -dEmbedAllFonts=true \ -dSubsetFonts=true \ -dAutoRotatePages=/None \ -dColorImageDownsampleType=/Bicubic \ -dColorImageResolution=72 \ -dGrayImageDownsampleType=/Bicubic \ -dGrayImageResolution=72 \ -dMonoImageDownsampleType=/Subsample \ -dMonoImageResolution=72 \ -sOutputFile=${outputFilePath} \ ${inputFile}`,
      (err, stdout, stderr) => {
        if (err) {
          res.json({
            error: "some error takes place",
          });
        }
        res.json({
          path: outputFilePath,
        });
      }
    );