Web Front-end
JS Tutorial
Why do I get a \'jQuery XML Error: \'Access-Control-Allow-Origin\' Header Missing\' when making cross-domain AJAX requests?
Why do I get a \'jQuery XML Error: \'Access-Control-Allow-Origin\' Header Missing\' when making cross-domain AJAX requests?
Nov 03, 2024 pm 09:20 PM
jQuery XML Error: 'Access-Control-Allow-Origin' Header Missing
In this case, the underlying issue is the same-origin policy, which restricts cross-domain requests for security reasons. When making an AJAX request to a different domain than the HTML page's origin, the browser will trigger a CORS (Cross-Origin Resource Sharing) request.
The specific error message indicates that the target server at http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml has not provided the necessary Access-Control-Allow-Origin header in its response. This header specifies which domains are allowed to access the resource.
To resolve this issue, you will need to ensure that the target server includes the appropriate CORS headers in its responses. This can involve modifying the server-side code to add the necessary headers or using a reverse proxy to mirror the request and add the headers there.
Additionally, here are some key points to keep in mind regarding CORS requests:
- Same-origin requests do not require special headers.
- CORS requests require the server to explicitly allow access from the client's origin through the Access-Control-Allow-Origin header.
- Preflight requests may be sent prior to the actual request to determine if the request will be allowed.
- Cross-domain requests may be subject to additional browser prompts or warnings.
By addressing the necessary header configurations, you can enable cross-domain AJAX requests and resolve the error related to missing CORS headers.
The above is the detailed content of Why do I get a \'jQuery XML Error: \'Access-Control-Allow-Origin\' Header Missing\' when making cross-domain AJAX requests?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
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
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
JavaScript vs. Java: Which Language Should You Learn?
Jun 10, 2025 am 12:05 AM
JavaScriptisidealforwebdevelopment,whileJavasuitslarge-scaleapplicationsandAndroiddevelopment.1)JavaScriptexcelsincreatinginteractivewebexperiencesandfull-stackdevelopmentwithNode.js.2)Javaisrobustforenterprisesoftwareandbackendsystems,offeringstrong
Which Comment Symbols to Use in JavaScript: A Clear Explanation
Jun 12, 2025 am 10:27 AM
In JavaScript, choosing a single-line comment (//) or a multi-line comment (//) depends on the purpose and project requirements of the comment: 1. Use single-line comments for quick and inline interpretation; 2. Use multi-line comments for detailed documentation; 3. Maintain the consistency of the comment style; 4. Avoid over-annotation; 5. Ensure that the comments are updated synchronously with the code. Choosing the right annotation style can help improve the readability and maintainability of your code.
The Ultimate Guide to JavaScript Comments: Enhance Code Clarity
Jun 11, 2025 am 12:04 AM
Yes,JavaScriptcommentsarenecessaryandshouldbeusedeffectively.1)Theyguidedevelopersthroughcodelogicandintent,2)arevitalincomplexprojects,and3)shouldenhanceclaritywithoutclutteringthecode.
Java vs. JavaScript: Clearing Up the Confusion
Jun 20, 2025 am 12:27 AM
Java and JavaScript are different programming languages, each suitable for different application scenarios. Java is used for large enterprise and mobile application development, while JavaScript is mainly used for web page development.
Javascript Comments: short explanation
Jun 19, 2025 am 12:40 AM
JavaScriptcommentsareessentialformaintaining,reading,andguidingcodeexecution.1)Single-linecommentsareusedforquickexplanations.2)Multi-linecommentsexplaincomplexlogicorprovidedetaileddocumentation.3)Inlinecommentsclarifyspecificpartsofcode.Bestpractic
Mastering JavaScript Comments: A Comprehensive Guide
Jun 14, 2025 am 12:11 AM
CommentsarecrucialinJavaScriptformaintainingclarityandfosteringcollaboration.1)Theyhelpindebugging,onboarding,andunderstandingcodeevolution.2)Usesingle-linecommentsforquickexplanationsandmulti-linecommentsfordetaileddescriptions.3)Bestpracticesinclud
JavaScript Data Types: A Deep Dive
Jun 13, 2025 am 12:10 AM
JavaScripthasseveralprimitivedatatypes:Number,String,Boolean,Undefined,Null,Symbol,andBigInt,andnon-primitivetypeslikeObjectandArray.Understandingtheseiscrucialforwritingefficient,bug-freecode:1)Numberusesa64-bitformat,leadingtofloating-pointissuesli
JavaScript vs. Java: A Comprehensive Comparison for Developers
Jun 20, 2025 am 12:21 AM
JavaScriptispreferredforwebdevelopment,whileJavaisbetterforlarge-scalebackendsystemsandAndroidapps.1)JavaScriptexcelsincreatinginteractivewebexperienceswithitsdynamicnatureandDOMmanipulation.2)Javaoffersstrongtypingandobject-orientedfeatures,idealfor
