我正在使用mozilla pdf js查看器。最初我通过iframe将我的base 64字符串显示到我的页面中。

const base64 = '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'

function base64ToBlob(base64, type = "application/octet-stream") {
    const binStr = atob(base64);
    const len = binStr.length;
    const arr = new Uint8Array(len);
    for (let i = 0; i < len; i++) {
        arr[i] = binStr.charCodeAt(i);
    }
    return new Blob([arr], { type: type });
}
const blob = base64ToBlob(base64, 'application/pdf');
const blobUrl = URL.createObjectURL(blob);
var url = "/web/viewer.html?file=" + blobUrl;
var iframe = document.getElementById('pdf-viewer');
iframe.src = url;
iframe.addEventListener("load", function () {
    setTimeout(() => {
        let PDFViewerApplication = window.iframe.contentWindow.PDFViewerApplication;
        console.log('PDFViewerApplication', PDFViewerApplication);
    })
});

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>'Hello, world!' example</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
<iframe id="pdf-viewer"></iframe>
<button class="download-btn">Download</button>
<script src="index.js"></script>
</body>
</html>

加载PDF后，我可以选择添加一些其他注解，例如自由文本功能或自绘制

但我找不到访问此文件的引用并将其转换为base 64的方法。因此，在用户进行所有修改后，我将获得base 64以及旧pdf和新pdf中的所有注解。
我找不到这样的例子。
我通过PDFViewerApplication属性访问pdf查看器引用。我有这样一个变量，并且有一堆属性和方法可从pdf js查看器库中获得。
我怎样才能得到base 64和所有的注解或者二进制格式？

3条答案

按热度按时间

8hhllhi21#

我通过查看器js库的源代码进行了调查，有一个save方法可以将文档与注解一起保存。我正在使用这个库的一些内部方法来获取pdf文件的示例，获取它的二进制数据，然后将其转换为base64

let binary;
async function save() {
    let PDFViewerApplication = window.iframe.contentWindow.PDFViewerApplication;
    if (PDFViewerApplication._saveInProgress) {
      return;
    }
    PDFViewerApplication._saveInProgress = true;
    await PDFViewerApplication.pdfScriptingManager.dispatchWillSave();
    const url = PDFViewerApplication._downloadUrl,
      filename = PDFViewerApplication._docFilename;
    try {
      PDFViewerApplication._ensureDownloadComplete();
      const data = await PDFViewerApplication.pdfDocument.saveDocument();
      console.log('save binary', data);
      const blob = new Blob([data], {
        type: "application/pdf"
      });
      binary = data;
      convertBinaryToBase64(data);
    //   await PDFViewerApplication.downloadManager.download(blob, url, filename);
    } catch (reason) {
      console.error(`Error when saving the document: ${reason.message}`);
      await PDFViewerApplication.download();
    } finally {
      await PDFViewerApplication.pdfScriptingManager.dispatchDidSave();
      PDFViewerApplication._saveInProgress = false;
      console.log('finally', binary);
    }
    if (PDFViewerApplication._hasAnnotationEditors) {
      PDFViewerApplication.externalServices.reportTelemetry({
        type: "editing",
        data: {
          type: "save"
        }
      });
    }
  }

赞(0）回复(0）举报 2023-01-29

igetnqfo2#

这是绝对没有问题的。这就是Adobe PDF如何使用PDF字段注解将信息发送回Acroforms中的母服务器（通过提交邮件按钮），但由于不安全和笨拙，除了一些政府/组织表单，坚持使用Acrobat Reader来控制修改后数据的上传。

您（作为用户）修改下载的PDF的html指令，添加文本或行在浏览器PDF二进制扩展，如Acrobat Reader或SumatraPDF插件或Chrome（Foxit）或FireFox（Mozilla PDF.js）.他们都做大致相同的一个或两个奇怪的差异.例如，他们都使用不同的临时存储文件名，因此没有一个共同的.

您保存注解修改，通过重命名文件到CPU（设备）文件系统上的文件夹中。（如果用户同意，您可以设置相同的名称）。请参见上面的文件名只是临时本地名称。因此需要重命名为drive：\folder\file. pdf
然后运行该OS（本机系统）Base64应用工具，对于Windows用户，该应用工具通过certutil.exe运行。对于Linux或Mac，该应用工具应该是base64 -e
然后要求用户从他们的文件系统上传base64文件（使用NEW.PDF的文件选择器要容易得多。

lg40wkob3#

要从带注解的PDF文件获取二进制数据，您可以使用PDF库或允许以编程方式操作PDF的工具。提取二进制数据，添加注解，保存并再次提取数据。有关特定方法，请查看库的文档。

javascript 添加注解后如何从pdf中获取base 64或二进制数据？

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