304 not modified

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IIS verbose error codes and explanations

When a user attempts to access content on a server that is running Internet information Services (IIS) through HTTP or File Transfer Protocol (FTP), IIS returns a numeric code that represents the state of the request. The status code is recorded in

Full-stack Prerequisite cache Caches

CACHE:A Collection of data duplicating original values stored elsewhere on a computer, usually for easier access--wikipedia Caching is a key technology in a system's rapid response, a set of things that are saved for future use, between

Web front-end performance optimization--How to improve page loading speed

Objective:In the same network environment, two also can meet your needs of the site, a "duang" of the load out, a tangled half a day just out, you will choose Which? Research shows that: the user most satisfied with the open page time is 2-5 seconds,

HTTP error rollup (404, 302, 200 ...) )

TTP 400-Invalid requestHTTP 401.1-Unauthorized: Logon failedHTTP 401.2-Unauthorized: Server configuration issues cause logon failureHTTP 401.3-acl prohibit access to resourcesHTTP 401.4-Unauthorized: Authorization denied by filterHTTP

Web Status Code

These status codes represent a temporary response. The client should be prepared to receive one or more 1xx responses before receiving a regular response.100-Continue.101-Switch protocol.2XX-SuccessThis type of status code indicates that the server

Introduction to the HTTP protocol

Introduction to HTTP protocol A brief introduction to the five-layer network protocol. Physical layer: To achieve a physical level of bitstream transmission, such as converting 0101 into a voltage signal through the cable transmission. At

HTTP request headers and Answer headers

HTTP request Header Overview (HttpServletRequest) An HTTP client (for example, a browser) that must indicate the type of request (typically get or post) when sending a request to the server. If necessary, the client can also choose to send another

Research on the caching problem in J2eeweb development __web

Research on the caching problem in the development of J2eeweb In general, the browser will cache the content of the page has been visited, about how to prevent browser caching, the introduction of the Internet everywhere there are related articles,

HTTP Debugging Tools: Fiddler Introduction II

Learn how to build a faster web site through fiddler. In this article, we'll use Fiddler to explore HTTP performance, caching, and compression. If you have not installed and configured Fiddler, please start with the first article. Overview of HTTP

HTTP protocol for header usage in PHP and Common methods summary _php tips

This article summarizes the HTTP protocol used by header in PHP and the common methods. Share to everyone for your reference. The specific methods are as follows: Copy Code code as follows: ? Php function HTTPS ($num) { $http = Array (

Modified HTTP Debugging Tools: Fiddler Introduction II

Learn how to build a faster web site through fiddler. In this article, we'll use Fiddler to explore HTTP performance, caching, and compression. If you have not installed and configured Fiddler, please start with the first article. Overview of HTTP

HTTP status Daquan

Reference is from RFC 2616 and is extended by RFC 2518, RFC 2817, RFC 2295, RFC 2774, RFC 4918, and other specifications. The red word represents a few of the more common status CODE "Continue": "101": Switching protocols "102": Processing

Request for the HTTP protocol

I. Basic format of the requestThe basic format of the request consists of the request line , the request header , and the request entity three parts. For example:Get/img/bd_logo1.png http/1.1Accept: */*referer:http://www.baidu.com/Accept-language:zh-

The response of the HTTP protocol

I. Basic format of the responseThe response basic format includes the status line , the response header , and the response entity Three parts, for example:http/1.1 OKserver:jsp3/2.0.6date:wed, Geneva 08:19:53 GMTContent-type:image/gifcontent-length:4

Request for the HTTP protocol

I. Basic format of the requestThe basic format of the request consists of the request line, the request header, and the request entity three parts. For example:Get/img/bd_logo1.png http/1.1Accept:

How to implement get and post requests using curl in PHP

One, what is curl?CURL is a tool that uses URL syntax to transfer files and data, and supports many protocols, such as HTTP, FTP, Telnet, and so on. Best of all, PHP also supports the CURL library. Using the PHP Curl Library, you can easily and

Summary of html5 offline storage problems

Summary of html5 offline storage problems An important feature of HTML5 is offline storage. The so-called offline storage is to save some resource files locally, so that subsequent page reloading will use local resource files, you can continue to

Http protocol learning summary, http Protocol Summary

Http protocol learning summary, http Protocol Summary This article is a summary of the basic knowledge of Http over the past few days. The content includes the principles of the Http protocol, Http request information, Http response information, and

Detailed explanation of browser cache issues when jQuery is used in ASP. net mvc, mvcjquery

Detailed explanation of browser cache issues when jQuery is used in ASP. net mvc, mvcjquery Introduction Although jQuery provides good support for caching when calling ajax in the browser, it is necessary to know how to use http efficiently. The

High-performance website construction rules

The golden rule for performance is only 10% & amp; ndash; 20% of end users spend time downloading HTML documents, and the remaining 80% ~ 90% of the time is spent on all the components on the download page (80%-90% of the user's waiting time is from

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