area code 304 from

Code and principle of 304 Not Modified on the asp.net page, 304 modified Through the previous example, we have seen the benefits of Caching: it can be reduced to server access, because the page can be displayed without accessing the server, which for the server, this reduces access pressure.However, if you force refresh the browser, the browser ignores the cache

Analyze the HTTP request and return the status code 304. The request returns the status code 304. Hello everyone, today I will share with you a status code of 304. You may see it intentionally or unintentionally when you open chr

In the process of doing SEO every seoer will inevitably do search engine spider crawling log analysis, a lot of friends just look at the number of spiders visit but ignore the spider's status code. Some friends are confused, what is the use of spider State Code? What does it say about 304? 　Search Engine "The" is not able to avoid Suppose on your website is ab

Turn: http://www.cnblogs.com/xiaowenhui/p/4669684.html First, preliminary knowledge-memory allocation of the programThe memory used by a program compiled by C + + is divided into the following sections1. Stack (stack)-Automatically allocated by the compiler to release, store the function parameter value, local variable value and so on. ItsOperations are similar to stacks in data structures.2, heap area (heap)-Generally by the programmer assigned to re

responds to the GET and HEAD requests, automatically transfers the requestor to a different location, but you should not use this code to tell Googlebot that a Web page or site has moved because Googlebot continues to crawl the original location and index it. 303 (See other locations) The server returns this code when the requestor should use a separate GET request for a different locati

In the website log , we often see a lot of HTTP code returned, such as 201, 304, 404, and so on. However, these specific return HTTP code exactly what the meaning of it, do a bit of knowledge in this, remember it doesn't matter, then look at the line, but the most important to be clear.Some of the common status codes are:200-Server successfully returned to Web pa

general situation of the HTTP status code will return 200 or 304: If it is a static page, Baidu Spiders first crawl a URL address, server-side return of the status code will be 200, while the page will record the Last-modified attribute mark (page last modified time, you can use before in Firefox SEO Plug-ins introduced httpfox detection ), such as In the seco

picture. When the browser first to access the picture, the browser must not have any of its cache record, at this time it to access the server, the server also returned the contents of the picture. However, since a picture may be referenced by multiple pages, the likelihood of its being modified is very small. Therefore, it is not necessary to read the picture and return the contents of the picture for multiple requests from the same browser, which both affect performance and waste bandwidth. A

Php uses code 304 to cache image files Private function _ addEtag ($ file ){ $ Last_modified_time = filemtime ($ file ); $ Etag = md5_file ($ file ); // Always send headers Header ("Last-Modified:". gmdate ("D, d m y h: I: s", $ last_modified_time). "GMT "); Header ("Etag: $ etag "); // Exit if not modified If (@ strtotime ($ _ SERVER ['http _ IF_

First, the HTTP status Code 304 understanding1, if the client in the request for a file, found itself cached files have last Modified, then in the request will contain if Modified Since, this time is the cache file of the last Modified. Therefore, if the request contains if Modified Since, it indicates that there is already a cache on the client. As long as you determine the time and the modified time of th

Hello everyone, today to share a status code 304, you may have been in the previous development of chrome tools or Firebug tool to intentionally or inadvertently see it.HTTP 304:not ModifiedThe standard explanation is that the not Modified client has a buffered document and makes a conditional request (typically providing a if-modified-since header indicating tha

The memory used by a program compiled by C + + is divided into the following sections1. Stack (stack)-Automatically allocated by the compiler to release, store the function parameter value, local variable value and so on. It operates in a manner similar to a stack in a data structure. 2, heap area (heap)-Generally by the programmer assigned to release, if the programmer does not release, the end of the program may be recycled by the OS. Note that it i

1, the stack area (stacksegment)-Automatically allocated by the compiler release, stored function parameters value, local variable value, etc., the system automatically releases the JVM memory resources after the execution of the method is completed.2. Heap area (heapsegment)-typically released by programmers, storing objects and arrays created by new, the JVM does not periodically view this object, and if

[mystack.top]=num; return 1; }}//out of the stackintpop () {intnum=-1; if(!IsEmpty ()) {num=Mystack.data[mystack.top]; Mystack.top-=1; } returnnum;}Recursive judging whether the array is decreasing the way oneintIsdec (intNum[],intLen) { if(len==1) { return 1; } Else { if(num[len-1]2]) { returnIsdec (num, Len-1); } Else { return-1; } }}　　Way TwoN must be 0int isdec (int num[],int len,int n) { if (n==len-2

China Administrative Code _ postal code _ area code SQL file backup, provided for everyone to download and use none China Administrative Code _ postal code _ area

LAC: Location Area Code Location Code　　 A location code (in a mobile communication system) is an area set for paging. It covers a geographical area and is generally divided by administrative