The Curl command simulates an HTTP Get/post request

When testing the backend program, you need to make a mock connection or write a test script.

Curl is a great command.

For example, destination site URL:
127.0.0.1:8080/check_your_status?user=summer&passwd=12345678
Request via Get Method:
Curl Protocol://address:port/url?args
Curl http://127.0.0.1:8080/check_your_status?user=Summer&passwd=12345678
Request via POST method:
curl-d "args" "Protocol://address:port/url"
Curl-d "user=summer&passwd=12345678" "Http://127.0.0.1:8080/check_your_status"
This method is the parameter directly inside the header
If you want to specify the output to a file, you can do so by redirecting it.
Curl-h "Content-type:application/json"-X POST--data (json.data) URL
Curl-h "Content-type:application/json"-X POST--data ' {"message": "Sunshine"} ' http://localhost:8000/
The method is that the JSON data is directly inside the body.

To view the request response time method using the Curl command
Curl-o/dev/null-s-W%{time_namelookup}::%{time_connect}::%{time_starttransfer}::%{time_total}::%{speed_download } "\ n" http://www.36nu.com

0.014::0.015::0.018::0.019::1516256.00

-O: Write the HTML and JS returned by Curl to the garbage collection station [/dev/null]
-S: Remove all States
-W: Write the RT in the following format
Time_namelookup:dns parsing the time of the domain name www.36nu.com
Time_commect:client and server end time to establish TCP connections
Time_starttransfer: A request from the client; the server in the Web responds to the first byte of time
Time_total:client sends a request to the Web server to send all the corresponding data time
Speed_download: Next week speed Unit byte/s
The above command and the return result can be understood as follows:
0.014:dns the time unit of the server parsing www.36nu.com is s
0.015:client the time that a request is made to C/s to establish TCP, including the time of DNS resolution
0.018:client the time at which the first byte of a response is emitted, including the previous 2 time
0.019:client sends a request, to S to send the response data all to the client, and to turn off the connect time
1516256.00: Speed of downloading data
Establish TCP connection to server when the client first byte is returned: 0.018s–0.015s = 0.003s
Time the server sent response data to client: 0.019s–0.018 = 0.01s

The Curl command simulates an HTTP Get/post request