View source for Centos 6 repositories does not work anymore

In file /etc/yum.repos.d/CentOS-Base.repo, comment out "mirrorlist" lines and add new "baseurl" lines.
File should look like:

 # CentOS-Base.repo
 #
 # The mirror system uses the connecting IP address of the client and the
 # update status of each mirror to pick mirrors that are updated to and
 # geographically close to the client.  You should use this for CentOS updates
 # unless you are manually picking other mirrors.
 #
 # If the mirrorlist= does not work for you, as a fall back you can try the 
 # remarked out baseurl= line instead.
 #
 #
 
 [base]
 name=CentOS-$releasever - Base
 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
 #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
 baseurl=https://vault.centos.org/6.10/os/$basearch/
 gpgcheck=1
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
 
 #released updates 
 [updates]
 name=CentOS-$releasever - Updates
 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
 #baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
 baseurl=https://vault.centos.org/6.10/updates/$basearch/
 gpgcheck=1
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
 
 #additional packages that may be useful
 [extras]
 name=CentOS-$releasever - Extras
 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
 #baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
 baseurl=https://vault.centos.org/6.10/extras/$basearch/
 gpgcheck=1
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
 
 #additional packages that extend functionality of existing packages
 [centosplus]
 name=CentOS-$releasever - Plus
 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra
 #baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
 gpgcheck=1
 enabled=0
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
 
 #contrib - packages by Centos Users
 [contrib]
 name=CentOS-$releasever - Contrib
 mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib&infra=$infra
 #baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/
 baseurl=http://vault.centos.org/$releasever/centosplus/$basearch/
 gpgcheck=1
 enabled=0
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

If repositories does not work after changes, run these commands:
 yum clean all
 yum makecache