Extract title and body content with jq utility

curl -s "https://catonrug.blogspot.com/feeds/posts/default/2074059158850758918?alt=json" | jq '.["version"]'
curl -s "https://catonrug.blogspot.com/feeds/posts/default/2074059158850758918?alt=json" | jq '.["encoding"]'
curl -s "https://catonrug.blogspot.com/feeds/posts/default/2074059158850758918?alt=json" | jq '.["entry"]'
curl -s "https://catonrug.blogspot.com/feeds/posts/default/2074059158850758918?alt=json" | jq '.["entry"] | .["xmlns"]'
curl -s "https://catonrug.blogspot.com/feeds/posts/default/2074059158850758918?alt=json" | jq '.["entry"] | .["content"]'
curl -s "https://catonrug.blogspot.com/feeds/posts/default/2074059158850758918?alt=json" | jq '.["entry"] | .["content"] | .["type"]'
curl -s "https://catonrug.blogspot.com/feeds/posts/default/2074059158850758918?alt=json" | jq '.["entry"] | .["content"] | .["$t"]'
curl -s "https://catonrug.blogspot.com/feeds/posts/default/2074059158850758918?alt=json" | jq -r '.entry|.content|."$t"'
curl -s "https://catonrug.blogspot.com/feeds/posts/default/2074059158850758918?alt=json" | jq -r '.entry|.title|."$t"'
curl -s "https://www.blogger.com/feeds/3325322079154148081/posts/default/2074059158850758918?alt=json" | jq -r '.entry|.title|."$t"'
Show all categories:
curl -s "https://catonrug.blogspot.com/feeds/posts/default/6841889261123299300?alt=json" | jq -r '.entry|.category|.[]|.term'
Install jq utility on debian:
apt-get install jq -y
For RHEL family:
curl -sL https://github.com/stedolan/jq/releases/download/jq-1.5/jq-linux64 -o /usr/bin/jq
chmod +x /usr/bin/jq
Extract body, decode body + enter title as filename:
curl -s "https://catonrug.blogspot.com/feeds/posts/default/2074059158850758918?alt=json" | jq -r '.entry|.content|."$t"' | base64 --decode > $(curl -s "https://www.blogger.com/feeds/3325322079154148081/posts/default/2074059158850758918?alt=json" | jq -r '.entry|.title|."$t"')
using alt=json there are the post limitation are 50. but using this method there is no limitation:
curl -s "https://catonrug.blogspot.com/feeds/posts/default/-/certbot?alt=json-in-script" | sed "s/gdata.io.handleScriptLoaded(//;s/);$//" | jq -r '.feed|.entry[]|.link[]|.href' | grep "\.html$"
Byat