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What is curl command used for?
curl is a command line tool to transfer data to or from a server, using any of the supported protocols (HTTP, FTP, IMAP, POP3, SCP, SFTP, SMTP, TFTP, TELNET, LDAP or FILE). curl is powered by Libcurl. This tool is preferred for automation, since it is designed to work without user interaction.
What does curl location flag do?
(HTTP/HTTPS) If the server reports that the requested page has a different location (indicated with the header line Location:) this flag will let curl attempt to reattempt the get on the new place. If used together with -i/–include or -I/–head, headers from all requested pages will be shown.
What is a curl cookie?
Cookie overview Cookies are name=contents pairs that a HTTP server tells the client to hold and then the client sends back those to the server on subsequent requests to the same domains and paths for which the cookies were set. Cookie prefixes and secure cookie modification protection has been implemented by curl.
Why do we need curl?
It uses URL syntax to transfer data to and from servers. curl is a widely used because of its ability to be flexible and complete complex tasks. For example, you can use curl for things like user authentication, HTTP post, SSL connections, proxy support, FTP uploads, and more!
By default, curl doesn’t send any cookies but you can add your own cookies via the -b ‘name=value’ command line argument. To save cookies from the response to a file, use the -c file option. To load cookies from a file, use the -b file option.
How to set cookies for Curl? You can use the -b (or –cookie) command-line switch to pass cookies to Curl. You can pass the filename that was previously created using the –cookie-jar command line parameter or pass cookies as a string.
How do you pass cookies in curl request?
You can use the -b (or –cookie) command-line switch to pass cookies to Curl. You can pass the filename that was previously created using the –cookie-jar command line parameter or pass cookies as a string.
What is the purpose of ” use curl–cookie with a…?
Example, if you want to let curl understand cookies from a page and follow a location (and thus possibly send back cookies it received), you can invoke it like: What is the purpose of “use –cookie with a file that doesn’t exist”?
Curl will not send back any cookies by default, unless the –cookie or –cookie-jar options were used. But many sites will send you into infinite redirects if you don’t accept their cookies; however, you may not want to store any state on disk and let them track you through separate curl invocations. Example with a bogus –cookie file:
IMHO, instead of using a non-existing file, using –cookie /dev/null would be safer and will achieve the same effect. Curl will not send back any cookies by default, unless the –cookie or –cookie-jar options were used.