Python test remote port connection time

Problem

Recent server access to other people's servers, sometimes reported time-out errors, and sometimes normal access to other people's servers.

Ideas

The first guess is caused by network instability, but they do not collect when time-out, when the normal access to other people's server logs, network operation and maintenance of the students do not bird me (in fact, this life is the operation of the matter, a little careful plug, but think of Spider-Man quotes).

The greater the capacity, the greater the responsibility.

Write a Python script and then, in a Python script, use Telnet to connect to the other server's port, and then calculate the length of time before and after the connection.

Solve

ImportOSImportCSVImport TimeImportArgparseImportTelnetlib fromDatetimeImportdatetime#Testing remote Service port connection time-consuming#Python3 windows_telnet.py 192.168.10.21Parser=Argparse. Argumentparser () parser.add_argument ("IP", Type=str, help="IP") parser.add_argument ("Port", Type=str, help="Port") args=Parser.parse_args () TimeFormat="%y-%m-%d%h:%m:%s.%f"Startimetitle="Start Connection Time"Endtimetitle="End Connection Time"Differencetimetitle="Total Connection Time" whileTrue:startime=DateTime.Now () Startimeview=startime.strftime (TimeFormat)Print("start connection: {0}". Format (Startimeview)) TN=Telnetlib. Telnet (Args.ip, args.port) endTime=DateTime.Now () Endtimeview=endtime.strftime (TimeFormat)Print("Connection complete: {0}". Format (Endtimeview)) Tn.close ()Print("End of Connection") Differencetime= EndTime-StartimePrint("connection consumption: {0}". Format (differencetime)) Nowtime=DateTime.Now () csvfilename="{0}.csv". Format (Nowtime.strftime ("%y-%m-%d"))    ifOs.path.exists (Csvfilename) is  notTrue:with Open (Csvfilename,"W", newline="") as Csvfile:fieldnames=[Startimetitle, Endtimetitle, Differencetimetitle] writer= csv. Dictwriter (CSVFile, fieldnames=fieldnames) Writer.writeheader () with open (Csvfilename,"a", newline="") as Csvfile:fieldnames=[Startimetitle, Endtimetitle, Differencetimetitle] writer= csv. Dictwriter (CSVFile, fieldnames=fieldnames) Writer.writerow ({startimetitle:startimeview, Endtimetitle:endtimeview, Differencetimetitle:di Fferencetime}) Time.sleep (0.2)

Here are a few python points of knowledge:

• Gets the current time, calculates the time difference, and formats
• telnetlibThe use
• Generate CSV files and read and write to files
• In while True this dead loop, you need to avoid the CPU going to 100%, you need to add time.sleep(0.2) the last line.
  Next one to talk about these points:

Python3 Get current time

 from Import  == DateTime.Now ()

In this way, we usually need to format the processing to show the user.

Python3 time Formatting

On the basis above, we can, do it

" %y-%m-%d%h:%m:%s.%f "  = Startime.strftime (TimeFormat)

Use strftime method processing to view the Date.strftime (format) portion of the Python3 document.

Python3 Calculating the time difference

Differencetime = endTime-  startime

Yes, just subtract it, and it's done.

Use of Telnetlib

Import= telnetlib. Telnet ("192.168.10.21" "+")

CSV file creation

ImportOSImportCsvcsvfilename="{0}.csv". Format (Nowtime.strftime ("%y-%m-%d"))ifOs.path.exists (Csvfilename) is  notTrue:with Open (Csvfilename,"W", newline="") as Csvfile:fieldnames=[Startimetitle, Endtimetitle, Differencetimetitle] writer= csv. Dictwriter (CSVFile, fieldnames=fieldnames) Writer.writeheader ()

This is to determine whether the file exists, if it does not exist, create a CSV file, and write the table header.

CSV file append

" a ", newline=" ") as CSVFile:    = [Startimetitle, Endtimetitle, Differencetimetitle]     = csv. Dictwriter (CSVFile, fieldnames=fieldnames)    writer.writerow ({startimetitle:startimeview, EndTimeTitle: Endtimeview, Differencetime

Dead cycle avoids high CPU

Inside the loop, add one last line:

Import Timetime.sleep (0.2)

Let the thread hibernate for a while, thus avoiding a dead loop that consumes too much CPU.

Using scripts

Python3 windows_telnet.py 192.168.10.21 80

You can then use this script to monitor remote port connection issues and generate a log file every day.

Python Learning Exchange Group: 125240963

Original: Https://www.jianshu.com/p/e2e88cbb7572?utm_source=tuicool&utm_medium=referral

Python test remote port connection time