mjhjmtu

I am trying to download the yesterday logs through an external API, For API I need to provide a date range from & to as input parameters.

From API I can download 1 hour log max for each call.

So if I want to download yesterday complete log. I need to call the API for 24 times with yesterday date(every hour time).

Note API will support only GMT time only. So need to provide GMT time.

Eg :- https://abcd.com/logs?start=FROM_DATE&end=TO_DATE

1. 
   First time loop it should go like below,


2. 
   https://abcd.com/logs?start=29-04-2018T00:00:00Z&end=29-04-2018T00:59:59Z
   


3. 
   Second time loop it should go like below


4. 
   https://abcd.com/logs?start=29-04-2018T01:00:00Z&end=29-04-2018T01:59:59Z
   


5. 
   Last time loop like below,


6. 
   https://abcd.com/logs?start=29-04-2018T23:00:00Z&end=29-04-2018T23:59:59Z
   

This script i will add in cron schedule, so everyday once it will get triggered and download yesterday 24 hour log complete.

Key points are

1. Yesterday date always


2. Format GMT


3. 24 times loop

Hope it is clear. The below mentioned answers are throwing error. I started with this script, it is considering the current time and doing the loop. Instead of that loop needs to start with 00:00:00 GMT time. Someone please help me.

#!/bin/bash
FROM_DATE=$(date -u -d "1 day ago" +%Y-%m-%d"T"%H":00:00""Z")
for i in 0..3
 do
 echo "FROM_DATE : $FROM_DATE"
 TO_DATE=$(date -u +%Y-%m-%d"T"%H":59:59""Z" -d "1 day ago""$date + $i hour")
 echo "TO_DATE : $TO_DATE"
 FROM_DATE=$(date -u +%Y-%m-%d"T"%H":00:00""Z" -d "1 day ago""$date + $i hour""$date + 1 hour")
 done

Try this.

#!/bin/bash
#
yesterday=$(date --utc --date 'yesterday' +'%Y-%m-%d')
for hour in 0..23
do
 printf "https://abcd.com/logs?start=%sT%02d:00:00Z&end=%sT%02d:59:59Zn" $yesterday $hour $yesterday $hour
done

It won't handle the occasional leap seconds. If you need that, use this more complex code where the last range of the day may need to go from 23:00:00 to 23:59:60, but ensure that your target application can also handle this:

#!/bin/bash
#
yesterday=$(date --utc --date 'yesterday' +'%Y-%m-%d')
leapsecond=$(date --utc --date @$(( $(date --utc --date '00:00:00' +%s) -1 )) +'%S')
lastsecond=59

for hour in 0..23
do
 [[ hour == 23 ]] && lastsecond=$leapsecond
 printf "https://abcd.com/logs?start=%sT%02d:00:00Z&end=%sT%02d:59:%02dZn" $yesterday $hour $yesterday $hour $lastsecond
done

I am getting as expected output.

#!/bin/bash
for i in 00..23
do FROM_DATE=$(date -u -d "1 day ago" +%Y-%m-%d"T"$i":00:00Z")
echo "FROM_DATE:" $FROM_DATE | tr -d 'r'
TO_DATE=$(date -u +%Y-%m-%d"T"$i":59:59Z" -d "1 day ago")
echo "TO_DATE : $TO_DATE" | tr -d 'r'
done

Thanks a lot for your help