grepping log files

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1

I have a log file and I have two unique strings which represent the start and end of the text I want to obtain.

How can I get all the text inbetween this start string and the end string?

Thanks

2 
#!/bin/bash
# tested on bash 4
declare -i toggle=0
while read -r line
do
    case "$line" in
        *start*)
            toggle=1
            line="${line#start}"
            ;;
        *end*)
            toggle=0
            line="${line%end*}"
            ;;
    esac
    if [ $toggle -eq 1 ];then
        echo "$line"
    fi
done <file
3

awk '/start_string/, /stop_string/' file