#! /bin/bash

# Author: gilbertas matusevicius, 2015
# This script fix rack gem issue with "too many open files" error
# http://trac.kolmisoft.com/trac/ticket/11601

# http://stackoverflow.com/questions/27773368/rails-4-2-internal-server-error-with-maximum-file-multiparts-in-content-reached

. /usr/src/k_framework/main.sh

SCRIPT_NAME="Rack fix"
VERSION="1.1.2"

k_start
k_config_details

if [[ $ROCKY9 == 1 ]]; then
    report "Only for Centos with old Rack" 3
    k_exit 0
fi

source "/usr/local/rvm/scripts/rvm" > /dev/null
RUBY_VER="2.2.2"

cd /home/$SYSTEM_CONFIG_DIR
gem_path=$(rvm ruby-"$RUBY_VER" do bundle show rack 2>/dev/null)

if [ $(echo $gem_path | grep rack | wc -l) -lt 1 ]; then
    report "Rack path not found. Aborting" 1
    k_exit 1
fi

file_path="${gem_path}/lib/rack/utils.rb"

if [ ! -f $file_path ];then
    report "Could not find file ${file_path}. Aborting" 1
    k_exit 1
fi

# offending line looks like this
# self.multipart_part_limit = (ENV['RACK_MULTIPART_PART_LIMIT'] || 128).to_i
# We will change this to this one   
# self.multipart_part_limit = 0


#Check if fix was already applied

if grep -Fq 'self.multipart_part_limit = 0' $file_path; then
    report "Rack fix was already applied" 0
    k_exit 0
fi

#Fix offending line

sed -i  's/\(self.multipart_part_limit\) \= (ENV.*/\1 \= 0/' $file_path

#Check if change was applied ok
if grep -Fq 'self.multipart_part_limit = 0' $file_path; then
    report "Rack multipart issue was fixed" 4
else
    report "Failed to fix rack issue" 3
    report "Check line containing self.multipart_part_limit in $file_path" 3;
    EXIT_CODE=1
fi

k_exit $EXIT_CODE