CurlHelpGuide.txt

Curl Commands by { Daily Investors }

1. curl "Transfers Data"
2. curl -o filename.ext http://....com/file.txt "Download a File and Save"
3. curl --limit-rate 100k http://...com/file.txt "Limit Download Speed"
4. curl -L "Follow Redirects"
5. curl -d "bame=value" http://...com/resource
6. curl -H "Content-Type: application/json" -d '{"key":"value"}' http://....com/resource  "Send JSON with a Post Request"
7. curl -i http://....com
8. curl -H "Custom-Header: Value" http://....com "Custom Header"
9. curl -u username:password http://...com
10. curl -X PUT http://....com "Different Requests {GET, POSt, PUT}
11. curl -O http://....com/file1.txt -O http://.....com/file2.txt "Download Multiple Files"
12. curl -C - -O http://.....com/largefile.zip "Resume Crashed Downloads"
13. curl -T localfile.txt ftp://ftp.example.com/upload "Transfer with FTP"
14. curl -x http://proxy-server:port http://....com
15. curl --data-urlencode "key=value" "Send encoded Data"
16. curl -D headers.txt http://....com "Save Response to File"
17. curl http://example.com/file.txt | grep "search-string" "Download and Run through a Pipe"
18. curl <url> -o <filegoingout> "Change file name"
19. curl http://....com/pic[1-24].jpg "Download through Sequential Numbers"
20. curl ftp://username:password@example.com
21. curl -X POST -d "username=test&password=<script>&submit=Login" http://....com/login.php "Test for malicious file"
22. curl -c cookies.txt <URL> "Extract Cookies"
23. curl -v <URL> "Verbose"
24. curl -I "View Headers"
25. curl --certinfo <URL> "Certificates"
26. curl --cacert server.crt <URL> 2>&1 | grep "Server certificate:" -A 10 "Save Certificate"
27. curl -c cookies.txt --max-redirs 0 <url_that_redirects> "Extracting Cookies without Redirects"
28. curl -v --max-redirs 0 <url_that_redirects> "Extract Tokens without Redirects"
29. curl -I --max-redirs 0 <url_that_redirects> "Extract Headers without Redirects"
30. curl --certinfo --max-redirs 0 <url_that_redirects> "Extract Certs without Redirect"


//Curl and APIS
1. POST
   curl -X POST -H "Content-Type: application/json" -d '{"username": "newuser", "email": "newuser@example.com", "password": "securepassword"}' <API_ENDPOINT_URL>
   -X POST specifies the HTTP method
   -H "Content-Type: application.json "Sets the Content-Type Header"
   -d '{"username":.....} "Provides the data to be sent inside the request"
2. PUT
   curl -X PUT -H "Content-Type: application/json" -d '{"email": "updateuser@example.com", "status": "active"}' <API_Endpoint>
3. Delete
   curl -X DELETE

//Testing Multiple Endpoints
1. Example
   curl -X POST -H "Content-Type: application/json" -d '{"username": "testuser", "email", "test@example.com"}' http://api_endpoint.com/users

//List Users
1. curl http://your_api.com/users

//Specific User
1. curl http://your-api.com/users/123

//Update User
1. curl -X PUT -H "Content-Type: application/json" -d '{"email": "updated@example.com"}' http://your-api.com/users/123

//Delete User
1. curl -X DELETE http://your-api.com/users/123

//Create a Product
1. curl -X POST -H ""Content-Type: application/json" -d '{"name": "New Product", "price": 25.00}' http://your-api.com/products

//List Products
1.  curl http://your-api.com/products


//Notes
 Write shell scripts that iterate through your list of endpoints and methods
 



//Curl and Wget
1. Get Cookies
   curl -c my_cookies.txt https://example.com/login
   "Inspect log, via web interface to get authenticated cookies"
2. Get Tokens
   curl -v https://example.com/protected_page
   "Manually Copy the token"
3. Download Data with Wget
   wget --load-cookies=my_cookies.txt --header="Authorization: Bearer eyJhbGciOiJIUzI1NilsInR5cC16IkpXVCJ.....your_copied_token...." https://example.com/data_to_download


1. wget --load-cookies=cookies.txt --max-redirect=0 <url_of_data_to_download> "Download without Redirects"
   To include a token in this header=
   wget --header="Authorization: Bearer <your_token>" --max-redirect=0 <url_of_data_to_download> "Download without Redirects"