Varnish​ ​Software​ ​Techni​cal​ ​Coding​ ​Evaluation​ ​(C,​ ​VCL)

Write​ ​a​ ​VMOD​ ​called​ ​​hiring​​ ​which​ ​has​ ​a​ ​function:

INT​ ​count(STRING​ ​haystack,​ ​STRING​ ​needle) 

Which​ ​counts​ ​how​ ​many​ ​times​ ​​needle​​ ​shows​ ​up​ ​in​ ​​haystack​.​ ​Ex:

hiring.count("test",​ ​"t") =>​ ​2 
hiring.count("mississippi",​ ​"iss") =>​ ​2 
hiring.count("hello",​ ​"x") =>​ ​0 
hiring.count("",​ ​"") =>​ ​0 

The​ ​VMOD​ ​must:

• Log​ ​the​ ​parameters​ ​and​ ​result​ ​to​ ​the​ ​VSL​ ​(varnishlog)
• Have​ ​at​ ​least​ ​1​ ​VTC​ ​(test​ ​case)​ ​which​ ​passes​ ​all​ ​the​ ​above​ ​examples​ ​as​ ​tests

Please​ ​see​ ​​https://github.com/varnishcache/libvmod-example​.

Log

# 1. Install deps
apt install\
    varnish\
    libvarnishapi-dev\
    libtool\ 
    m4\ 
    automake\
    autotools-dev;

# 2. Build and install varnish cache development kit - vcdk
git submodule update --init
cd vcdk
./bootstrap
make
sudo make install
cd ..

# 3. Generate varnish mod named 'hiring' using vcdk
vcdk autotools --vmod=hiring hiring
cd hiring/
./bootstrap
make
make -s check

# 4. Update the 3 following files to add the 'hiring.count()' function
./hiring/src/vmod_hiring.c
./hiring/src/vmod_hiring.vcc
./hiring/src/vtc/vmod_hiring.vtc

Thanks to https://github.com/varnishcache/libvmod-example/tree/master/src 🙏