cheat.sheets:curl
# curl
# Transfer data from or to a server using various protocols.
# Download a file from a URL and save it with a specific name
curl -o filename.ext http://example.com/file.txt
# Download a file from a URL and save it with the original filename
curl -O http://example.com/file.txt
# Download a file and limit the download speed
curl --limit-rate 100K http://example.com/file.txt
# Follow redirects if the URL has moved
curl -L http://example.com
# Send POST data to a server
curl -d "name=value" http://example.com/resource
# Send JSON data with a POST request
curl -H "Content-Type: application/json" -d '{"key":"value"}' http://example.com/resource
# Include headers in the output
curl -i http://example.com
# Display only the HTTP headers for a GET request
curl -I http://example.com
# Send a request with a custom header
curl -H "Custom-Header: Value" http://example.com
# Authenticate with a username and password
curl -u username:password http://example.com
# Use a different request method like PUT or DELETE
curl -X PUT http://example.com/resource
# Download multiple URLs in sequence
curl -O http://example.com/file1.txt -O http://example.com/file2.txt
# Resume a failed or interrupted download
curl -C - -O http://example.com/largefile.zip
# Transfer a file using FTP
curl -T localfile.txt ftp://ftp.example.com/upload/
# Specify a proxy for the request
curl -x http://proxy-server:port http://example.com
# Send data with the URL encoded format
curl --data-urlencode "key=value" http://example.com/resource
# Save the response headers to a file
curl -D headers.txt http://example.com
# Download a file and run it through a pipe (e.g., to `grep`)
curl http://example.com/file.txt | grep "search-string"
cheat:curl
# To download a file:
curl <url>
# To download and rename a file:
curl <url> -o <outfile>
# To download multiple files:
curl -O <url> -O <url>
# To download all sequentially numbered files (1-24):
curl http://example.com/pic[1-24].jpg
# To download a file and pass HTTP authentication:
curl -u <username>:<password> <url>
# To download a file with a proxy:
curl -x <proxy-host>:<port> <url>
# To download a file over FTP:
curl -u <username>:<password> -O ftp://example.com/pub/file.zip
# To get an FTP directory listing:
curl ftp://username:password@example.com
# To resume a previously failed download:
curl -C - -o <partial-file> <url>
# To fetch only the HTTP headers from a response:
curl -I <url>
# To fetch your external IP and network info as JSON:
curl http://ifconfig.me/all.json
# To limit the rate of a download:
curl --limit-rate 1000B -O <outfile>
# To get your global IP:
curl httpbin.org/ip
# To get only the HTTP status code:
curl -o /dev/null -w '%{http_code}\n' -s -I URL
tldr:curl
# curl
# Transfers data from or to a server.
# Supports most protocols, including HTTP, FTP, and POP3.
# More information: <https://curl.se>.
# Download the contents of a URL to a file:
curl http://example.com --output path/to/file
# Download a file, saving the output under the filename indicated by the URL:
curl --remote-name http://example.com/filename
# Download a file, following location redirects, and automatically continuing (resuming) a previous file transfer and return an error on server error:
curl --fail --remote-name --location --continue-at - http://example.com/filename
# Send form-encoded data (POST request of type `application/x-www-form-urlencoded`). Use `--data @file_name` or `--data @'-'` to read from STDIN:
curl --data 'name=bob' http://example.com/form
# Send a request with an extra header, using a custom HTTP method:
curl --header 'X-My-Header: 123' --request PUT http://example.com
# Send data in JSON format, specifying the appropriate content-type header:
curl --data '{"name":"bob"}' --header 'Content-Type: application/json' http://example.com/users/1234
# Pass a username and password for server authentication:
curl --user myusername:mypassword http://example.com
# Pass client certificate and key for a resource, skipping certificate validation:
curl --cert client.pem --key key.pem --insecure https://example.com
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cheat.sh