Learn python-day02-03--From Python Distributed Crawler Creating Search Engine Scrapy

Section 347, Python Distributed Crawler Build Search Engine Scrapy Essentials - Randomly Change user-agent Browser user-agent through Download Middleware Introduction to download Middleware Middleware is a framework that can be connected to request/response processing.This is a very light, low-level sys ...

Posted on Mon, 17 Feb 2020 17:14:55 -0800 by bp90210

How do I determine CPU and memory consumption from within a process?

I was once tasked with determining the following performance parameters from within a running application: Total Available Virtual Memory Currently used virtual memory Virtual memory currently used by my process Total available RAM RAM currently in use RAM currently used by my process Percentage of CPU curre ...

Posted on Wed, 08 Jan 2020 19:20:02 -0800 by dapuxter

Generating Random Numbers in Objective-C

I'm mainly a Java header, and I want a way to generate pseudo-random numbers between 0 and 74.I use this method in Java: Random.nextInt(74) I'm not interested in discussions about seeds or real randomness, just how you accomplish the same task in Objective-C.When I search for Google, I seem to have a lot of different and conflicting infor ...

Posted on Sat, 21 Dec 2019 19:49:58 -0800 by coreysnyder04

Understand how to create RabbitMQ cluster on a single machine

Learn more about installing clusters on a single computer and how to add more nodes to the cluster in the course of java, code a lot of professional knowledge, and share it with you for reference. If you have problems setting up a cluster on a single computer, the following article may help answer some questions. I assume you have set up Rabbit ...

Posted on Mon, 16 Dec 2019 06:55:13 -0800 by thedualmind

Creating chef server image with actual Packer

Packer introduction Packer is a lightweight open source tool that creates a consistent image for multiple platforms from a single configuration file. It can run on the mainstream operating system and create multi platform virtual machine image in parallel and efficiently. It provides a solid foundation for the code that is the infrastructure. I ...

Posted on Wed, 11 Dec 2019 02:32:23 -0800 by NuLL[PL]

Making Mac OS 10.13.3 installation disk

app store download macOS High Sierra Only the latest version of Mac OS can be downloaded. The old version has been removed. There are two situations, one is the app with the size of 19M, and the other is the app with the size of 5G. Former reference Creating a macOS High Sierra Installation ISO Image , the latter refers to Making macOS High Si ...

Posted on Sat, 30 Nov 2019 23:17:48 -0800 by famous58

Prompt after restarting the pagoda panel - ModuleNotFoundError: No module named 'geventwebsocket'

Background: Because the server deployed the flash project and installed python3, it reported an error when restarting the pagoda panel 1 [Traceback (most recent call last): 2 File "/root/anaconda3/lib/python3.7/site-packages/gunicorn/util.py", line 135, in load_class 3 mod = import_module('.'.join(components)) 4 File "/root/anac ...

Posted on Tue, 26 Nov 2019 14:04:21 -0800 by The Silent

Go in API routing middleware logging

SummaryFirst, synchronize the following project overview:The previous article shared the planning project directory and parameter validation, in which the parameter validation uses the version of validator.v8, which has been updated to the version of validator.v9, and the latest code can be viewed in github.Let's share this article: routing Mid ...

Posted on Sat, 09 Nov 2019 12:36:27 -0800 by Daguse

Wake up Baidu and Gaode APP in H5

A few days ago, the United black card fed back a need to open Baidu APP or Gaode APP in H5, so I checked relevant documents on the Internet and put a link below: 1 Gould map 2.Baidu Maps The specific idea is to click and select the map, first request APP link, no response after 800 ms, and then jump to H5 link. One of the disadvantages of th ...

Posted on Sat, 09 Nov 2019 12:02:17 -0800 by jl

Installing ZABBIX? Server on ansible playbook, agent monitoring

The main task is to automatically generate zabbix_server and agent through playbook. The automation is not fully realized here. The acquisition of machines here still needs to be manually filled in. If you are interested in acquiring the machines to be deployed through automatic acquisition, you can intercept them through the command of awk, wh ...

Posted on Tue, 29 Oct 2019 07:40:29 -0700 by mazen