Curl detection of redirect


 
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Old 02-24-2017
Curl detection of redirect

This URL:

Internet Archive Wayback Machine

..will redirect to this URL when using a browser:

https://web.archive.org/web/20140110...desformat=html

But when accessing the first URL with curl (or wget) there is no information about the redirect and it ends up a 404. Can the redirect information be obtained somewhere or somehow from the command line such as with curl or wget? I've looked at the headers and HTML body with no luck and can't figure out where the browser obtains the redirect URL from.
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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)