在Chrome OS中使用API打印PDF文件

本示例展示如何使用Chrome OS提供的API在Google Cloud Print中打印PDF文件。

chrome.printerProvider.onPrintRequested.addListener(
  function(printJob) {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', printJob.contentType);
    xhr.responseType = 'blob';
    xhr.onload = function() {
      var blob = xhr.response;
      var formData = new FormData();
      formData.append('printerid', printJob.printerName);
      formData.append('capabilities', JSON.stringify(printJob.capabilities));
      formData.append('content', blob);
      var xhr2 = new XMLHttpRequest();
      xhr2.open('POST', 'https://www.google.com/cloudprint/submit');
      xhr2.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
      xhr2.onload = function() {
        // 打印任务已提交
      };
      xhr2.onerror = function() {
        // 打印任务提交失败
      };
      xhr2.send(formData);
    };
    xhr.send();
  }
);

免责申明：文章和图片全部来源于公开网络，如有侵权，请通知删除 server@dude6.com