Before you start, explain the two methods in Urllib2: info and Geturl Urlopen The answer object returned by response (or Httperror instance) has two very useful methods info () and Geturl ()
1.geturl ():
This returns the real URL obtained, which is useful because the Urlopen (or the opener object) may be redirected. The URL you get may be different from the request URL.
As an example of a super link in everyone,
Let's build a urllib2_test10.py to com
[Python] web crawler (4): Opener, Handler, and openerhandler
Before proceeding, let's first explain the two methods in urllib2: info and geturl.The response object response (or HTTPError instance) returned by urlopen has two useful methods: info () and geturl ()
1. geturl ():
Geturl () returns the obtained real URL, which is useful because urlopen (or the opener object) may be redirected. The obtained URL
Before proceeding, let's first explain the two methods in urllib2: info and geturl.
The response object response (or httperror instance) returned by urlopen has two useful methods: Info () and geturl ()
1. geturl ():
This returns the obtained real URL, which is useful because urlopen (or used by the opener object) may be redirected. The obtained URL may be different from the requested URL.
Take a hyperlink from a person as an example,
We will create
The two methods are used to refresh the parent window, but there are still some mysteries.
Window. opener. location. reload (); when this method forces the parent window, a confirmation dialog box is displayed in some ie browsers (such as high security settings, it prompts if you want to refresh the page again. This is a depressing thing. I later replaced this method with window. opener. location. href = W
The urllib2.urlopen () function does not support authentication, cookie, or other advanced HTTP functions. To support these functions, you must use the build_opener () function to create a custom Opener object.
Copy codeThe Code is as follows:Build_opener ([handler1 [handler2,...])
Handler is a Handler instance. HTTPBasicAuthHandler, HTTPCookieProcessor, and ProxyHandler are commonly used.
The objects returned by build_opener () have the open () metho
Handler processors and custom opener
Opener is urllib2. Openerdirector example, we have been using the Urlopen, it is a special opener (that is, the module to help us build).
However, the basic Urlopen () method does not support other HTTP/HTTPS advanced features such as proxies, cookies, and so on. So to support these features:
Use related Hand
Use Window. Opener to bypass CSRF Protection
With the popularity of Web applications, security issues have become increasingly prominent. At present, the security of Web applications is more guaranteed by Web developers than by client verification mechanisms. This makes Web applications more flexible and reliable, but at a high cost. Currently, 70% of Web applications are very vulnerable, because the client-based authentication mechanism is very easy
Before starting the following content, let's first explain the two methods in urllib2: infoandgeturl. before starting the following content, let's explain the two methods in urllib2: info and geturl.
The response object response (or HTTPError instance) returned by urlopen has two useful methods: info () and geturl ()
1. geturl ():
This returns the obtained real URL, which is useful because urlopen (or used by the opener object) may be redirected. The
Window. opener, via window. open the reference of the parent form of the child form. The following describes how to use it in detail. If you are interested, refer to window. opener, via window. open refers to the parent form of the child form.
For example, in the parent form parentForm, window. open ("subForm.html") means window. opener represents parentForm in
The Urllib2.urlopen () function does not support authentication, cookies, or other HTTP advanced features. To support these features, you must use the Build_opener () function to create a custom opener object.
Copy Code code as follows:
Build_opener ([Handler1 [Handler2, ...]])
Parameter handler is a handler example, commonly used in Httpbasicauthhandler, Httpcookieprocessor, Proxyhandler and so on.
The object returned by Bu
CentOS + rar + unrar install rar unrar command details first write down the two most common rar commands to package the 21andy.com directory as andy.rar www.2cto.com # rar andy.rar. /21andy.com/decompress andy.rar to the current directory # rar x andy.rar CentOS +
Window. opener returns the reference of the window in which the current window is created.
Window. opener usage
In a textbox with the id "name" on window. opener worker, you can write it:
Optional values opener.doc ument. getElementById ("name"). value = "input data ";
I have no good understanding of window. opener
RAR is a data and file packaging format, need to decompress the software to open, the most commonly used tool is winrar. WinRAR is the most commonly used compression decompression tool, but the billing version. If you install the Compression decompression tool, still can not open, that may be your computer poisoning, the virus hijacked the RAR related components caused by the
This article focuses on window. openernull; window. close (), only supports IE6 does not support IE7, IE8 solution is introduced, need friends can come to refer to, hope to help you window. opener = null; window. close (). Only IE6 does not support IE7.
Open a new window and close the window. The prompt before closing the window is not displayed.Function openWin (){Window. open ('login. jsp ', '', 'fullscreen = yes, menubar = no, resizable = no ');
A.D. March 29, 2015, in Shanghai on business, because lazy, so reported a "Shanghai Day Trip" (Night Line, because Shanghai night is more beautiful than daytime), and a group of small partners experienced the China Pavilion, Waitan, World Financial Center, cruise. I never knew "bottle opener"---the World financial Building was built by the Japanese, and now the revenue of the building is still in Japan. Especially the shape of two knives, want to chok
The "preface" is explained in the blog post:This article will introduce through the personal tone of the Linux platform related compression and decompression command related knowledge, in the current time point "May 23, 2017 " under the grasp of the technical level is limited, there may be a lot of knowledge understanding is not deep enough or comprehensive, I hope you point out the problem of common exchange, In the follow-up work and study, if found that the content of this article and the act
Open a new window and close the window. The prompt before closing the window is not displayed.Function openwin (){Window. Open ('login. jsp ', '', 'fullscreen = Yes, menubar = No, resizable = no ');Window. Opener = NULL;Window. Close ();}
In IE7
Function openwin (){
Window. Opener = NULL;Window. Open ('login. jsp ', '', 'fullscreen = Yes, menubar = No, resizable = no ');Window. Close ();}
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in JS, Window.opener is just a reference to the pop-up window's parent window. This article is mainly on the use of JS opener in detail, the need for friends can come to the reference, I hope to help you. In JS, Window.opener is just a reference to the pop-up window's parent window. For example: a.html, by clicking the button and so on to window.open out a new window b.html. Then in b.html, we can use Window.opener (omit write as
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