Downloading and Opening a PDF File using Ajax
In web development, it is common to generate files dynamically and download them to the client. Handling file downloads using Ajax can be tricky, especially for file formats like PDFs. One common issue is downloading and opening a PDF file using Ajax calls.
Problem:
A user has an action class that generates a PDF and sets the appropriate content type. They are attempting to call this action through an Ajax call and open the downloaded PDF file in the browser. However, the Ajax call results in an error: "Your browser sent a request that this server could not understand."
Solution:
To resolve this issue and successfully download and open a PDF file using Ajax, follow these steps:
- Generate the PDF file: In the action class, generate the PDF file using your preferred library and set the appropriate content type as you have already done.
-
Handle the Ajax call in JavaScript:
- Use the XMLHttpRequest object to initiate an Ajax call to the action URL.
- Set the request method to "POST" or "GET" according to your action method.
-
Process the server response:
- In the success callback function of the Ajax call, handle the server's response.
- Use the Blob API to create a new Blob representing the downloaded PDF data.
- Create an anchor () element and set its href attribute to the Blob's object URL.
- Set the download attribute to specify the desired filename for the PDF file.
- Trigger the click event on the anchor element to initiate the download and open the PDF file.
Here's an example JavaScript code that demonstrates this approach:
<code class="javascript">$.ajax({ url: '<url_to_file>', success: function(data) { var blob = new Blob([data]); var link = document.createElement('a'); link.href = window.URL.createObjectURL(blob); link.download = '<filename_to_save_with_extension>'; link.click(); } });</filename_to_save_with_extension></url_to_file></code>
By using this method, you can successfully download and open a PDF file using Ajax, streamlining your web application's file handling capabilities.
The above is the detailed content of How to Download and Open a PDF File Using Ajax?. For more information, please follow other related articles on the PHP Chinese website!

JVMmanagesgarbagecollectionacrossplatformseffectivelybyusingagenerationalapproachandadaptingtoOSandhardwaredifferences.ItemploysvariouscollectorslikeSerial,Parallel,CMS,andG1,eachsuitedfordifferentscenarios.Performancecanbetunedwithflagslike-XX:NewRa

Java code can run on different operating systems without modification, because Java's "write once, run everywhere" philosophy is implemented by Java virtual machine (JVM). As the intermediary between the compiled Java bytecode and the operating system, the JVM translates the bytecode into specific machine instructions to ensure that the program can run independently on any platform with JVM installed.

The compilation and execution of Java programs achieve platform independence through bytecode and JVM. 1) Write Java source code and compile it into bytecode. 2) Use JVM to execute bytecode on any platform to ensure the code runs across platforms.

Java performance is closely related to hardware architecture, and understanding this relationship can significantly improve programming capabilities. 1) The JVM converts Java bytecode into machine instructions through JIT compilation, which is affected by the CPU architecture. 2) Memory management and garbage collection are affected by RAM and memory bus speed. 3) Cache and branch prediction optimize Java code execution. 4) Multi-threading and parallel processing improve performance on multi-core systems.

Using native libraries will destroy Java's platform independence, because these libraries need to be compiled separately for each operating system. 1) The native library interacts with Java through JNI, providing functions that cannot be directly implemented by Java. 2) Using native libraries increases project complexity and requires managing library files for different platforms. 3) Although native libraries can improve performance, they should be used with caution and conducted cross-platform testing.

JVM handles operating system API differences through JavaNativeInterface (JNI) and Java standard library: 1. JNI allows Java code to call local code and directly interact with the operating system API. 2. The Java standard library provides a unified API, which is internally mapped to different operating system APIs to ensure that the code runs across platforms.

modularitydoesnotdirectlyaffectJava'splatformindependence.Java'splatformindependenceismaintainedbytheJVM,butmodularityinfluencesapplicationstructureandmanagement,indirectlyimpactingplatformindependence.1)Deploymentanddistributionbecomemoreefficientwi

BytecodeinJavaistheintermediaterepresentationthatenablesplatformindependence.1)Javacodeiscompiledintobytecodestoredin.classfiles.2)TheJVMinterpretsorcompilesthisbytecodeintomachinecodeatruntime,allowingthesamebytecodetorunonanydevicewithaJVM,thusfulf


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

SublimeText3 Chinese version
Chinese version, very easy to use

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
