How to send network requests and data transmission in Linux

The curl command is used for network requests and data transfer in the terminal.

1. Send a GET request:

   curl [URL]
   

   Using the curl command plus the URL to be requested, you can send a GET request and display the response results.

2. Send POST request:

   curl -X POST -d "参数" [URL]
   

   Use -X POSToptions to specify the request method as POST, and use -doptions to specify the parameters of the POST request.

3. Set request headers:

   curl -H "头部信息" [URL]
   

   Use -Hoptions to set custom request headers, -H "Content-Type: application/json"e.g.

4. Save response to file:

   curl -o [保存的文件名] [URL]
   

   Use -othe option followed by the saved file name to save the response to a specified file.

5. Follow the redirect:

   curl -L [URL]
   

   Using -Loptions, you can have curl automatically follow redirects returned by the server.

6. Use a proxy:

   curl -x [代理地址:端口号] [URL]
   

   Use -xoptions to set up a proxy server for requests.

7. Resumable upload:

   curl -C - -T [本地文件路径] [URL]
   

   Using -C - -Tthe option, you can resume uploading files after a breakpoint, and only upload the new part of the file.

8. Download a file and show progress:

   curl -O [URL]
   

   Using -Othe option, you can download the file to the current directory and display the download progress in the terminal.