Upgrading Ubuntu 12.04.x LTS (precise pangolin) cURL and libcurl from 7.22.0 to 7.39.0
Upgrading 12.04 curl to 7.39.0 can not be done using package system. In this how-to I will show how to upgrade by manually compiling and binding PHP.
[STEP 1] Download new version 7.39.0 from cURL website:
cd /usr/local/src
wget http://curl.haxx.se/download/curl-7.39.0.tar.gz
tar -zxvf curl-7.39.0.tar.gz
cd curl-7.39.0
[STEP 2] Configure, make and install:
./configure --enable-optimize --enable-warnings --disable-ares --enable-shared --enable-static=no --enable-http --enable-ftp --disable-ldap --disable-ldaps --disable-rtsp --enable-proxy --disable-dict --disable-telnet --disable-tftp --enable-pop3 --enable-imap --enable-smtp --disable-gopher --disable-ipv6 --enable-threaded-resolver --enable-verbose --disable-sspi --enable-crypto-auth --disable-ntlm-wb --disable-tls-srp --enable-cookies --disable-soname-bump --without-librtmp
make
make install
[STEP 3] Remove existing installation (if installed via apt-get):
apt-get remove curl
apt-get autoremove
[STEP 4] Confirm cURL got installed:
ls -lsa /usr/local/bin
ls -lsa /usr/local/lib
Note: you should see curl binary executable with today's date.
[STEP 5] CREATE SOFT LINK FOR 'curl' EXECUTABLE IN /usr/bin
ln -s /usr/local/bin/curl /usr/bin/curl
[STEP 6] VERIFY DEFAULT CURL is now using new version:
curl -V
Step 6 completes the upgrade of cURL and libcurl. You can stop here if you do not need to upgrade other softwares using the cURL on your computer / server.
If you are using PHP, you have to continue with the steps below to rebind PHP with your new cURL binaries.
--------------- [PHP BINDING] ----------------------------------
The instructions below will rebind your PHP to your newly upgraded cURL and libcurl. I am using PHP-FPM. However this how-to guide should work similarly for mod-php. The steps below are optional if you are not using PHP.
[STEP 7] UPGRADE PHP cURL BINDING
(mine was version 7.22.0)
apt-get install php5-curl
( this may also upgrade your PHP from 5.4.x to newest 5.4.x - at the time of this writing, I was upgraded to PHP 5.4.36-1 )
curl -V
should show:
curl 7.39.0 (x86_64-unknown-linux-gnu) libcurl/7.39.0 OpenSSL/1.0.1 zlib/1.2.3.4
Protocols: file ftp ftps http https imap imaps pop3 pop3s smtp smtps
Features: AsynchDNS Largefile NTLM SSL libz
[STEP 8[ RESTART PHP5-FPM + WEBSERVER
service php5-fpm restart
service nginx restart
------------------------------------------------------------
CHANGES NEEDED IN PHP CODE
If you are using curl option CURLOPT_SSLVERSION, it is recommended comment this out (do not use this option).
By default (leaving unset), PHP's curl extension should automatically negotiate with remote server the best protocol to use.
I have tried to set CURLOPT_SSLVERSION to CURL_SSLVERSION_TLSv1 and got error about CURL_SSLVERSION_TLSv1 not defined.
This is because CURL_SSLVERSION_TLSv1 was not defined before PHP 5.5. Since I am not going to upgrade to 5.5+ just because of this issue, I decided to just NOT set the CURLOPT_SSLVERSION option.
In case you still want to set CURLOPT_SSLVERSION to whatever value you want, here are the define values:
Tip: the value in the parentheses is the constant's value.
CURL_SSLVERSION_DEFAULT (0)CURL_SSLVERSION_TLSv1 (1)CURL_SSLVERSION_SSLv2 (2)CURL_SSLVERSION_SSLv3 (3)CURL_SSLVERSION_TLSv1_0(4)CURL_SSLVERSION_TLSv1_1 (5) CURL_SSLVERSION_TLSv1_2 (6)