How to Build PDF Files from Binary Strings in JavaScript Across Different Browsers?

Building PDF Files from Binary Strings in JavaScript

Introduction

Creating a PDF file from a binary string received from a web service can be a useful task in many web applications. However, using data:uri to embed the binary data in browsers such as IE9 and Firefox can lead to issues. This article explores solutions that work across different browsers.

Solution: File System Creation

As mentioned by the original poster, one solution involves creating a PDF file on the file system and prompting the user to download it. This approach ensures compatibility with various browsers.

Implementation

To implement this solution, you can use the following steps:

1. Configure your XMLHttpRequest to use responseType = "blob".
2. Handle the load event of the XMLHttpRequest to retrieve the response as a Blob object.
3. Create an objectURL from the Blob object to represent the PDF file.
4. Create an anchor element () and set its href attribute to the objectURL and download attribute to the desired filename.
5. Append the anchor element to the document body and click it to prompt the user to download the file.
6. Remove the anchor element after the download is complete to prevent unnecessary resources being retained.

Here is a code example:

<code class="javascript">var request = new XMLHttpRequest();
request.open("GET", "/path/to/pdf", true);
request.responseType = "blob";
request.onload = function (e) {
  if (this.status === 200) {
    var file = window.URL.createObjectURL(this.response);
    var a = document.createElement("a");
    a.href = file;
    a.download = this.response.name || "detailPDF";
    document.body.appendChild(a);
    a.click();
    window.onfocus = function () {
      document.body.removeChild(a);
    };
  }
};
request.send();</code>

Conclusion

This solution allows you to build PDF files from binary strings in a way that works across browsers like IE, FF, Opera, Chrome, and Safari, providing a more reliable method for handling PDF downloads.

The above is the detailed content of How to Build PDF Files from Binary Strings in JavaScript Across Different Browsers?. For more information, please follow other related articles on the PHP Chinese website!