redirect variable to same program at next loop

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curlopt_redir_protocols

CURLOPT_REDIR_PROTOCOLS(3)				     curl_easy_setopt options					CURLOPT_REDIR_PROTOCOLS(3)

NAME

       CURLOPT_REDIR_PROTOCOLS - set protocols allowed to redirect to

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_REDIR_PROTOCOLS, long bitmask);

DESCRIPTION

       Pass  a long that holds a bitmask of CURLPROTO_* defines. If used, this bitmask limits what protocols libcurl may use in a transfer that it
       follows to in a redirect when CURLOPT_FOLLOWLOCATION(3) is enabled. This allows you to limit specific transfers to only be allowed to use a
       subset of protocols in redirections.

       Protocols denied by CURLOPT_PROTOCOLS(3) are not overridden by this option.

       By  default  libcurl  will allow all protocols on redirect except several disabled for security reasons: Since 7.19.4 FILE and SCP are dis-
       abled, and since 7.40.0 SMB and SMBS are also disabled. CURLPROTO_ALL enables all protocols on redirect, including those disabled for secu-
       rity.

       These are the available protocol defines:
       CURLPROTO_DICT
       CURLPROTO_FILE
       CURLPROTO_FTP
       CURLPROTO_FTPS
       CURLPROTO_GOPHER
       CURLPROTO_HTTP
       CURLPROTO_HTTPS
       CURLPROTO_IMAP
       CURLPROTO_IMAPS
       CURLPROTO_LDAP
       CURLPROTO_LDAPS
       CURLPROTO_POP3
       CURLPROTO_POP3S
       CURLPROTO_RTMP
       CURLPROTO_RTMPE
       CURLPROTO_RTMPS
       CURLPROTO_RTMPT
       CURLPROTO_RTMPTE
       CURLPROTO_RTMPTS
       CURLPROTO_RTSP
       CURLPROTO_SCP
       CURLPROTO_SFTP
       CURLPROTO_SMB
       CURLPROTO_SMBS
       CURLPROTO_SMTP
       CURLPROTO_SMTPS
       CURLPROTO_TELNET
       CURLPROTO_TFTP

DEFAULT

       All protocols except for FILE, SCP and since 7.40.0 SMB and SMBS.

PROTOCOLS

       All

EXAMPLE

       curl = curl_easy_init();
       if(curl) {
	 /* pass in the URL from an external source */
	 curl_easy_setopt(curl, CURLOPT_URL, argv[1]);

	 /* only allow redirects to HTTP and HTTPS URLs */
	 curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS,
			  CURLPROTO_HTTP | CURLPROTO_HTTPS);

	 /* Perform the request */
	 curl_easy_perform(curl);
       }

AVAILABILITY

       Added in 7.19.4, before then it would follow all protocols.

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_PROTOCOLS(3),

libcurl 7.54.0							September 21, 2016					CURLOPT_REDIR_PROTOCOLS(3)

Shell Programming and Scripting