If you use IE5.0 or higher version browser, you can obtain XML data from the server through HTTP request.
-------------------------------------------------- ------------------------------------
Browser request
By browsing The server can send HTTP requests and obtain XML data from the server:
var objHTTP = new ActiveXObject("Microsoft.XMLHTTP") objHTTP.Open('GET','httprequest.asp',false) objHTTP.Send()
The following code displays the return data from the server in the browser:
document.all['A1'].innerText= objHTTP.status document.all['A2'].innerText= objHTTP.statusText document.all['A3'].innerText= objHTTP.responseText
------ -------------------------------------------------- --------------------------
Interaction with the server
You can "interact" with the server through HTTP requests .
Using XML to interact with the server
We "fabricated" the following ASP code on the server side to interact with:
<% response.ContentType="text/xml" txt="<answer><text>12 Years</text></answer>" response.write(txt) %>
So no matter what you ask, the answer is always It's 12 years. In real life, you have to write a lot of code to analyze the problem and respond to the correct answer.
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RSS documents are a simple subscription mechanism to publish content updates through XML files. 1. The RSS document structure consists of and elements and contains multiple elements. 2. Use RSS readers to subscribe to the channel and extract information by parsing XML. 3. Advanced usage includes filtering and sorting using the feedparser library. 4. Common errors include XML parsing and encoding issues. XML format and encoding need to be verified during debugging. 5. Performance optimization suggestions include cache RSS documents and asynchronous parsing.

RSS and XML are still important in the modern web. 1.RSS is used to publish and distribute content, and users can subscribe and get updates through the RSS reader. 2. XML is a markup language and supports data storage and exchange, and RSS files are based on XML.

RSS enables multimedia content embedding, conditional subscription, and performance and security optimization. 1) Embed multimedia content such as audio and video through tags. 2) Use XML namespace to implement conditional subscriptions, allowing subscribers to filter content based on specific conditions. 3) Optimize the performance and security of RSSFeed through CDATA section and XMLSchema to ensure stability and compliance with standards.

RSS is an XML-based format used to publish frequently updated data. As a web developer, understanding RSS can improve content aggregation and automation update capabilities. By learning RSS structure, parsing and generation methods, you will be able to handle RSSfeeds confidently and optimize your web development skills.

RSS chose XML instead of JSON because: 1) XML's structure and verification capabilities are better than JSON, which is suitable for the needs of RSS complex data structures; 2) XML was supported extensively at that time; 3) Early versions of RSS were based on XML and have become a standard.

RSS is an XML-based format used to subscribe and read frequently updated content. Its working principle includes two parts: generation and consumption, and using an RSS reader can efficiently obtain information.

The core structure of RSS documents includes XML tags and attributes. The specific parsing and generation steps are as follows: 1. Read XML files, process and tags. 2. Extract,,, etc. tag information. 3. Handle custom tags and attributes to ensure version compatibility. 4. Use cache and asynchronous processing to optimize performance to ensure code readability.

The main differences between JSON, XML and RSS are structure and uses: 1. JSON is suitable for simple data exchange, with a simple structure and easy to parse; 2. XML is suitable for complex data structures, with a rigorous structure but complex parsing; 3. RSS is based on XML and is used for content release, standardized but limited use.


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