tclcurl_share(3) [debian man page]
TclCurl(3) TclCurl TclCurl(3) NAME
TclCurl: - get a URL with FTP, FTPS, HTTP, HTTPS, SCP, SFTP, TFTP, TELNET, DICT, FILE, LDAP, LDAPS, IMAP, IMAPS, POP, POP3, SMTP, SMTPS and gopher syntax. SYNOPSIS
curl::shareinit shareHandle share ?data? shareHandle unshare ?data? shareHandle cleanup curl::sharestrerror errorCode DESCRIPTION
With the share API, you can have two or more 'easy' handles sharing data among them, so far they can only share cookies and DNS data. curl::shareinit This procedure must be the first one to call, it returns a shareHandle that you need to use to share data among handles using the -share option to the configure command. The init MUST have a corresponding call to cleanup when the operation is completed. RETURN VALUE shareHandle to use. shareHandle share ?data? The parameter specifies a type of data that should be shared. This may be set to one of the values described below: cookies Cookie data will be shared across the easy handles using this shared object. dns Cached DNS hosts will be shared across the easy handles using this shared object. Note that when you use the multi interface, all easy handles added to the same multi handle will share DNS cache by default without this having to be used! shareHandle unshare ?data? This command does the opposite of share. The specified parameter will no longer be shared. Valid values are the same as those for share. sharehandle cleanup Deletes a shared object. The share handle cannot be used anymore after this function has been called. curl::sharestrerror errorCode Returns a string describing the error code passed in the argument. SEE ALSO
curl, TclCurl TclCurl 7.22.0 3 October 2011 TclCurl(3)
Check Out this Related Man Page
libcurl-share(3) libcurl share interface libcurl-share(3) NAME
libcurl-share - how to use the share interface DESCRIPTION
This is an overview on how to use the libcurl share interface in your C programs. There are specific man pages for each function mentioned in here. All functions in the share interface are prefixed with curl_share. OBJECTIVES
The share interface was added to enable sharing of data between curl "handles". ONE SET OF DATA - MANY TRANSFERS You can have multiple easy handles share data between them. Have them update and use the same cookie database or DNS cache! This way, each single transfer will take advantage from data updates made by the other transfer(s). SHARE OBJECT
You create a shared object with curl_share_init(3). It returns a handle for a newly created one. You tell the shared object what data you want it to share by using curl_share_setopt(3). Currently you can only share DNS and/or COOKIE data. Since you can use this share from multiple threads, and libcurl has no internal thread synchronization, you must provide mutex callbacks if you're using this multi-threaded. You set lock and unlock functions with curl_share_setopt(3) too. Then, you make an easy handle to use this share, you set the CURLOPT_SHARE option with curl_easy_setopt(3), and pass in share handle. You can make any number of easy handles share the same share handle. To make an easy handle stop using that particular share, you set CURLOPT_SHARE to NULL for that easy handle. To make a handle stop sharing a particular data, you can CURLSHOPT_UNSHARE it. When you're done using the share, make sure that no easy handle is still using it, and call curl_share_cleanup(3) on the handle. SEE ALSO
curl_share_init(3), curl_share_setopt(3), curl_share_cleanup(3) libcurl 7.10.7 8 Aug 2003 libcurl-share(3)