After changing the enclosing quotes from ' to ", escape the quotation marks " used inside the parameters as below:
curl -XGET gitlab.server:9200/ -H "Content-Type: application/json" -d "{\"query\": {\"simple_query_string\" : {\"fields\" : [\"content\"], \"query\" : \"foo bar -baz\"}}}"
An alternative is to put the json into a file, and use the @ prefix for the parameters.
json.txt
{
"query": {
"simple_query_string" : {
"fields" : ["content"],
"query" : "foo bar -baz"
}
}
}
and run curl as below:
curl -XGET gitlab.server:9200/ -H "Content-Type: application/json" -d @json.txt
