must have waves plugins

Python implements the method of crawling novels by waves, This article provides an example of how Python crawls a stream-by-wave novel. Share it with you for your reference. The specific analysis is as follows: I like to read novels on the Internet. I have been using a novel download reader. I can automatically download the novels I want to read from the Internet to my local location, which is more convenient. Inspired by the Python crawler, I suddenl

first ensure that all data transmitted to a has been transferred before the disconnection, and once the data is transmitted,The Fin field of the reply message is set to 1, and a random seq sequence number is generated. (Fin=1,ack=x+1,seq=z,z generated randomly by the server)4. When the client receives a TCP disconnect request from the server, it responds to the service-side disconnect request, including a randomly generated SEQ field and an ACK field.The ACK field adds 1 to the server-side TCP

your clothes, as shown in the following figure: New layer, filled with black, layer mode: Multiply, opaque 20%, as shown below: Find a blue sky and white clouds of material, to extract the cloud, a lot of methods, not introduced. Change the mode, lightness, use a black brush to remove unwanted clouds. The following figure: Find a source of the waves and extract the waves. Use a black brush to

three handshake familiar, four times wave estimated that the so-called Four waves (Four-way Wavehand) that terminates the TCP connection, When disconnecting a TCP connection, the client and server are required to send a total of 4 packets to confirm the disconnection of the connection. In socket programming, this process is triggered by executing close on either side of the client or service side, as shown in the entire process:Figure 3 TCP Four

last few lines can be a good way to reduce the number of time_wait sockets, but for squid, the effect is not small. This parameter controls the maximum number of time_wait sockets, preventing squid servers from being dragged to death by a large number of time_wait sockets.Reference articlesHttp://www.cnblogs.com/tankxiao/archive/2012/10/10/2711777.htmlhttp://blog.csdn.net/whuslei/article/details/6667471http://molewan.blog.51cto.com/287340/114592http://www.jellythink.com/archives/705Https://wiki

The introduction of water wave texture, the early need to use a variety of filters to produce black and white watermark effect, and then color. The use of filters when the parameter settings are more important, depending on the actual picture size to be set.Final effect 1, create a new 640 * 480 pixel document, background fill black.2, the implementation: Filter > Rendering > Lens halo, properly set the parameters, the approximate effect of the following figure.3, the implementation: Filter > T

. At this point, 3 handshake completed, connection established!State transitions when disconnectingBecause TCP connections are full-duplex, disconnecting is a little more hassle than establishing a connection. The client sends a FIN message to the server, requests a disconnection, and its status changes to Fin_wait1. After the server receives the fin, an ACK occurs to the client, and the server state changes to close_wait. When the client receives an ACK, it enters the fin_wait2 state. The conne

As the saying goes, the rainbow after the storm, but after the financial turmoil, the rainbow in all walks of life need their own to create. In the economic stability but lack of growth momentum of the situation, each industry is a surprise, want to in the post-crisis era to create a better future for themselves, so as to keep pace with the times to maintain steady growth. In the face of such an economic environment, the domain name industry has also been frequent moves, set off a wave of

With the popularity of netbooks in Europe and the United States, a large number of manufacturers before the production of cottage machines began to switch to the cottage, more constantly have thousand-yuan netbook news to the newspaper, to the old Yao to the whole industry understanding, domestic CPU 2009 difficult to overturn waves. The current market rumors of the thousand-yuan netbook is mainly based on local processors, the current Beijing June Z

Context.drawimage (IMG,0, 0); } varRequestanimframe = (function() {//used to make an animation. returnWindow.requestanimationframe | |Window.webkitrequestanimationframe||Window.mozrequestanimationframe||Window.orequestanimationframe||Window.msrequestanimationframe||function(callback) {Window.settimeout (callback,1000/60); }; })(); Window.cancelanimationframe= window[' Webkitcancelanimationframe ' | |//name has chan

re-sent. The time required in the TIME_WAIT state is dependent on the implementation method. Typical values are 30 seconds, 1 minutes, and 2 minutes. The connection is formally closed after waiting, and all resources (including the port number) are released."Question 1" Why is the handshake three times when it is connected and four times when it is closed?A: The syn+ack message can be sent directly after the server receives the SYN connection request message from the client side. Where the ACK

ACK message, and allocates resources for this connection. An ACK message is also sent to the server segment after the client receives an ACK message, and the resource is allocated so that the TCP connection is established.The process of disconnecting the connectionThe disconnect end can be either the client side or the server side. Assuming the client side initiates an interrupt connection request, the FIN message is sent first. After the server has received the FIN message, but if there is no

disconnect end can be either the client side or the server side. The assumes the client side initiates an interrupt connection request and sends the FIN message first. After the server has received the FIN message, but if there is no data sent to complete, you do not need to close the socket, you can continue to send data. So to stop. At this point the client enters the fin_wait state and continues to wait for Fin messages on the server side. . After the client receives the fin message, it is

interrupt request 1, the client sends a FIN message to the server and informs the server that I want to interrupt the connection. At this point the state of the client is Fin_wart_12, after the server receives fin, if no data is sent, then send an ACK to the client. On my behalf I received your request for interruption, but I still have data to send to you. At this point the client status is Fin_wait_2. The state of the server is CLOSE_WAIT3, when the server has no data to send to the client, t

re-sent. The time required in the TIME_WAIT state is dependent on the implementation method. Typical values are 30 seconds, 1 minutes, and 2 minutes. The connection is formally closed after waiting, and all resources (including the port number) are released."Question 1" Why is the handshake three times when it is connected and four times when it is closed?A: The syn+ack message can be sent directly after the server receives the SYN connection request message from the client side. Where the ACK

messages to each other, that is, close the connection. So what you need to accomplish in the close_wait state is waiting for you to close the connection. (Passive side)Last_ack: This state is still relatively easy to understand, it is the passive close side after sending fin messages, and finally wait for each other's ACK message. When an ACK message is received, it is also possible to enter the closed available state. (Passive side)CLOSED: Indicates a connection interruption.# Why do I need to

What is TCP?Specifically about what TCP is, I'm not going to say it in detail; When you see this article, I think you know the concept of TCP, and want to get a deeper understanding of TCP's work, we will continue. It's just a super-messy protocol, and it's the foundation of the Internet and the basic skills that every programmer must have. First look at the OSI seven-layer model:http://www.0xffffff.org/?p=1131Http://www.nowcoder.com/discuss/1922?type=order=0pos=19page=1http://blog.csdn.net/xsf5

be re-sent. The time required in the TIME_WAIT state is dependent on the implementation method. Typical values are 30 seconds, 1 minutes, and 2 minutes. The connection is formally closed after waiting, and all resources (including the port number) are released."Question 1" Why is the handshake three times when it is connected and four times when it is closed?A: The syn+ack message can be sent directly after the server receives the SYN connection request message from the client side. Where the A

recommended that you read the two books, "heterogeneous" and "the top of the waves. Inspur Summit summarizes the growth and failure of big IT companies on the same stage as Apple in 20 or 30 years, helping them better understand apple and Steve Jobs. "Heterogeneous" puts a wider and deeper field of view, explores the common characteristics of masters in various fields, and finds that masters require at least 10 thousand hours of deep training, in add

re-sent. The time required in the TIME_WAIT state is dependent on the implementation method. Typical values are 30 seconds, 1 minutes, and 2 minutes. The connection is formally closed after waiting, and all resources (including the port number) are released."Question 1" Why is the handshake three times when it is connected and four times when it is closed?A: The syn+ack message can be sent directly after the server receives the SYN connection request message from the client side. Where the ACK