JQuery uses the method Jquery.browser to determine the browser, the return value can be: Safari opera msie Mozilla.Of course, there are times when we need to differentiate between versions. jQuery.browser.versionfunction Judgebroswer () {if($.browser.msie) {alert ("This is msie!");//IE } Else if($.browser.safari) {alert ("This is safari!");//Safari } Else if($.browser.mozilla) {alert ("This is mozilla!");//Firefox } Else if($.browser.opera) {alert ("T
If you execute:Copy codeThe Code is as follows:Var currentDate = new Date ();Alert (currentDate. getYear ());2008 is displayed, but 108 is displayed in FF. Why?First, let's take a look at the Greenwich Mean Time (GMT). It started from January 1, 1900. Let's take a look at this computation expression: 108 + 1900 = 2008.The reason is that FF does not add the year 1900, and the code is as follows:Copy codeThe Code is as follows:/*** Get the current date** @ Return {}*/Function getCurrentDate (){Var
Chapter 2 Scrapy breaks through anti-crawler restrictions and scrapy Crawlers7-1 anti-crawler and anti-crawler processes and strategies
I. Basic concepts of crawlers and anti-crawlers
Ii. Anti-crawler Purpose
Iii. crawler and anti-crawler protection process
7-2 scrapy architecture source code analysis
Schematic:
When I first came into contact with scrapy, I checked this schematic, as shown in figure
Now we have a new schematic, which is more intuitive, such
After reading the source code parsin
Then share a PHP write to get each search Spider crawl record code
Supported search engines are as follows
Records of Baidu,google,bing,yahoo,soso,sogou,yodao crawling sites can be recorded!
The PHP code is as follows
Copy CodeThe code is as follows:
function Get_naps_bot ()
{
$useragent = Strtolower ($_server[' http_user_agent ');
if (Strpos ($useragent, ' Googlebot ')!== false) {
Return ' Google ';
}
if
WSD
VaR browser = {
Isie :(! Navigator. useragent. Match (/Gecko /)! Window. Opera ),
Isie7: (navigator. useragent. Match (/MSIE \ s + 7/I )),
Isie8: (navigator. useragent. Match (/MSIE \ s + 8/I )),
Isie6 :(! Navigator. useragent. Match (/Gecko /)! Window. Opera )(! Navigator. use
This article mainly introduces how to use javascript to determine the type and version of the current browser. although it is not comprehensive, it is recommended for you to simply learn the methods and ideas. I wrote a method to determine the current browser type and version, and tested it only on IE 8/11, Google, and 360 browsers (not completely ).
I hope you will give your comments.
; (Function ($, window, document, undefined) {if (! Window. browser) {var
Use javascript to determine the current browser and the current javascript
I wrote a method to determine the current browser type and version, and tested it only on IE 8/11, Google, and 360 browsers (not completely ).
I hope you will give your comments.
; (Function ($, window, document, undefined) {if (! Window. browser) {var userAgent = navigator. userAgent. toLowerCase (), uaMatch; window. browser = {}/**
The following is a code written in php to obtain crawling records of search spider.
The following search engines are supported:
Record the crawling websites of Baidu, Google, Bing, Yahoo, Soso, Sogou, and Yodao!
The php code is as follows:
Copy codeThe Code is as follows: Function get_naps_bot ()
{
$ Useragent = strtolower ($ _ SERVER ['HTTP _ USER_AGENT ']);
If (strpos ($ useragent, 'googlebot ')! = False
Jquery determines the implementation code of the current browser.
I wrote a method to determine the current browser type and version. I only tested it on IE 8/11, Google, and 360 browsers (not completely) and needed jquery.
Core code:
; (Function ($, window, document, undefined) {if (! Window. browser) {var userAgent = navigator. userAgent. toLowerCase (), uaMatch; window. browser = {}/*** determines whethe
been, which spider. These are good for your targeted optimization.
Many servers support spider crawl logs, but most webmasters are virtual machines, and some space does not support the record spider crawling. At this point we need to write code to record the behavior of spiders.
On the internet to find a lot of code is not used correctly, or the function is not perfect.
As long as you study. Summarize a set of code, hundred guaranteed to use.
!--? phpfunction Get_naps_bot () {$
of a custom operating system (such as openWRT) or a notebook. Three types of data can be captured after the configuration takes effect.
The first part is network sniffing. Run a tcpdump process on the wireless listening device to monitor the traffic packets sent by all other devices. Then put it in the filter, and only save the probe request to the log file. The file format only contains the MAC address of the device and the SSID sent by the probe request.
The second part is device identificati
processing, it is not the case of PHP, PHP program even if the "test database" failure, will not affect the PHP program.
PHP recursive array source code:
php
$data ["username"]= "Zhang Feast";
$data ["Password"]= "do not know";
$data ["IP"]= "192.168.0.18";
Register_shutdown_function ("Post_data", $data);
function Post_data ($data)
//{
$ Curl = New Curl_class ();
$ Post = @ $curl- > post ("http://127.0.0.1/b.php", $data);//This is b.php's access address, p
in the form of the above.
6. How to synchronize remote and local files?
My $ code = mirror ('HTTP: // www.yahoo.com.cn ','/path/file.html ');
The mirror function compares the consistency between the remote and local files, and returns a status number. For example, if the file is the same, 304 is returned. If the local file is synchronized successfully, 200 is returned.
7. How to test whether the returned status is correct?
Is_success ($ code)Is_error ($ code)
The
function getbrowserversion () {
var browser ={};
var useragent = navigator. useragent. tolowercase ();
VaRS;
(S = useragent. Match (/MSIE ([\ D.] + )/))
? Browser. Ie = s [1]
: (S = useragent. Match (/Firefox \/([\ D.] + )/))
? Browser. Firefox = s [1]
: (S =
handled, it will not be related to php. Even if the php program fails to write "Test Database, it will not affect the php program.
PHP recursive array source code:
Php
$ Data ["username"] = "banquet ";
$ Data ["password"] = "unknown ";
$ Data ["ip"] = "192.168.0.18 ";
// ReGISter_shutdown_function ("post_data", $ data );
// Function post_data ($ data)
//{
$Curl=NewCurl_Class ();
$Post= @ $ Curl->Post ("http: // 127.0.0.1/B. php", $ data); // The access address of B. php is
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