while using linux, I thought subversion client should natively support http schema,  but actually it doesn’t. By reading installation instruction, it says I need Neon… Then I download Neon and configure with –with-neon=<neonpath>, doesn’t work! try copy neon to subversion source code, reconfigure it… without –with-neon option… still doesn’t work! Shit… via looking into configure log, it says…

checking neon library version… 0.29.0
You have a neon/ subdir containing version 0.29.0,
but Subversion needs neon 0.28.4.

An appropriate version of neon could not be found, so libsvn_ra_neon
will not be built.  If you want to build libsvn_ra_neon, please either
install neon 0.28.4 on this system

or

get neon 0.28.4 from:
    http://www.webdav.org/neon/neon-0.28.4.tar.gz
unpack the archive using tar/gunzip and rename the resulting
directory from ./neon-0.28.4/ to ./neon/

no suitable neon found

… download 0.28.4, copy to sub folder, configure… yeah… works, finally. You can check whether it supports http via “svn –version”, there should be a ra_neon module.