AsposeXMPAddNamespace

AsposeXMPAddNamespace function

Registers namespace URI and add value.

function AsposeXMPAddNamespace(
    fileBlob, 
    fileName, 
    fileNameResult
)

Parameter	Type	Description
fileBlob	Blob object	Content of source file.
fileName	string	Source file name.
fileNameResult	string	Result file name.

Return Value

JSON object

Field	Description
errorCode	code error (0 no error)
errorText	text error ("" no error)
XMP	array of metadata values
fileNameResult	result file name

Examples

  var fGetXmpMetadata = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      const prefix = "tmp";
      const url = "http://www.some.org/schema/tmp#";
      const nsValues = [
        ["tmp:newKey", "NewValue"]
      ];
      const json = AsposeXMPAddNamespace(event.target.result, e.target.files[0].name, e.target.files[0].name + "_out.eps", prefix, url, nsValues);
      if (json.errorCode == 0) {
          document.getElementById('output').textContent = json.XMP;
          DownloadFile(json.fileNameResult, "image/eps");
      }
      else 
        document.getElementById('output').textContent = json.errorText;
    }
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }

Web Worker example:

  /*Create Web Worker*/
  const AsposePageWebWorker = new Worker("AsposePageforJS.js");
  AsposePageWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
  AsposePageWebWorker.onmessage = evt => document.getElementById('output').textContent = 
    (evt.data == 'ready') ? 'library loaded!' :
      (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/image", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

  /*Event handler*/
  const fPsAsPdf = e => {
    const file_reader = new FileReader();
    file_reader.onload = event => {
      const prefix = "tmp";
      const url = "http://www.some.org/schema/tmp#";
      const nsValues = [
        ["tmp:newKey", "NewValue"]
      ];
      AsposePageWebWorker.postMessage({ "operation": 'AsposeXMPAddNamespace', "params": [event.target.result, e.target.files[0].name, e.target.files[0].name + "_out.eps", prefix, url, nsValues] }, [event.target.result]);
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

  /*Make a link to download the result file*/
  const DownloadFile = function (filename, mime, content) {
      mime = mime || "application/octet-stream";
      var link = document.createElement("a"); 
      link.href = URL.createObjectURL(new Blob([content], {type: mime}));
      link.download = filename;
      link.textContent = filename;
      link.title = "Click here to download the file";
      document.getElementById('fileDownload').appendChild(link);
      document.getElementById('fileDownload').appendChild(document.createElement("br"));
  }

See Also

• function AsposeXMPAddArrayItem
• function AsposeXMPAddNamedValue