AsposePdfPrepareBase64

Save the string representation BLOB in the Memory FS for processing.

function AsposePdfPrepareBase64(
    base64Blob,
    fileName
)

Parameters:

• base64Blob string representation Blob object, with format “data:mime/type;base64,…”, where ‘mime/type’: image/png, application/octet-stream, …
• fileName file name

Web Worker example: doesn’t work, use AsposePdfPrepare

  const test_pfx = "data:application/octet-stream;base64,MIIEcQIBAzCCBDcGCSqGSIb ... ==";
  /*Create Web Worker*/
  const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
  AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
  AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
    (evt.data == 'ready') ? 
      AsposePdfPrepareBase64(test_pfx, 'test.pfx') ?? 'loaded!' :
        (evt.data.json.errorCode == 0) ?
          `Result:${'Saved the base64 data to memory FS'}` :
          `Error: ${evt.data.json.errorText}`;
  
  /*AsposePdfPrepareBase64 for Web Worker*/
  const AsposePdfPrepareBase64 = (base64, filename) =>
    fetch(base64)
      .then(res => res.arrayBuffer())
        .then(buffer => {
            const file_reader = new FileReader();
            /*Ask Web Worker */
            file_reader.onload = event => AsposePDFWebWorker.postMessage(
                 { "operation": 'AsposePdfPrepare', "params": [event.target.result, filename] },
                 [event.target.result]
               );
            file_reader.readAsArrayBuffer(new File([new Uint8Array(buffer)], filename));
          }
        );

Simple example:

  var ffileSignPKCS7 = function (e) {
    const test_pfx = "data:application/octet-stream;base64,MIIEcQIBAzCCBDcGCSqGSIb ... ==";
    /*Save the string representation BLOB in the Memory FS for processing*/
    AsposePdfPrepareBase64(test_pfx,"test.pfx");
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*Sign a PDF-file and save the "ResultSignPKCS7.pdf"*/
      const json = AsposePdfSignPKCS7(event.target.result, e.target.files[0].name, 1, "test.pfx", "Password", 100, 100, 200, 100, "Reason", "Contact", "Location", 1, "/Aspose.jpg","ResultSignPKCS7.pdf");
      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
      else document.getElementById('output').textContent = json.errorText;
      /*Make a link to download the result file*/
      DownloadFile(json.fileNameResult, "application/pdf");
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };