Elastic Search and SharePoint DataSources

We name our datasources after the sites they're indexing, which in ElasticSearch does'nt realy work well.
ElasticSearch sees the // and : from http:// and cuts them up
so http://thesun.co.uk becomes  4 :
http
thesun
co
uk

or if you use file share \\myserver\logs becomes
myserver
logs


But if you set the datasource field  as " not analyzed "  , then the facet search will work and not cut them up at the special chars

curl -XPUT "http://localhost:9200/crawllog/log/_mapping" -d ' {
    "log" : {
        "properties": {
             "Url":{"type":"string"},
             "ErrorMessage" : { "type" : "string" },
             "Date":{"type":"string"},
             "ErrorDescription":{"type":"string"},
             "ErrorId":{"type":"long"},
             "ContentSource":{"type":"string","index":"not_analyzed"}}}}}'