无法通过Logstash中的http插件解析JSON字段

Question

我希望将通过curl触发的http输入（JSON）解析并保存在elasticsearch中。输入将是这样的：-

卷曲http://localhost:8080 -d {“ applicationname”：“ app2”，“ timestamp”：“ 07/06/2019 12:40:40”，“ errormsg”：“第1行错误”

我想解析每个JSON密钥（应用程序名称，时间戳记，错误消息），并基于应用程序名称和时间戳记创建索引。

下面是我正在使用的logstash.conf文件。

input {
    http {
        host => "localhost"
        port => "8080"
        codec => json
    }   
}
filter {  
    json {
        source => "message"
        target => "parsedJson"
    }
    mutate {
        add_field => {
            "appname" => "%{[parsedJson][applicationname]}"
            "tst" => "%{[parsedJson][timestamp]}"
            "msg" => "%{[parsedJson][errormsg]}"
        }
    }
}
output {    
    elasticsearch { 
        hosts => ["localhost:9200"] 
        index => "%{[appname]}-%{+YYYY.MM.dd}"
    }   
    stdout { codec => rubydebug }
}

在解析此JSON输入时需要帮助。我在logstash中收到以下输出：

{
           "tst" => "%{[parsedJson][timestamp]}",
           "msg" => "%{[parsedJson][errormsg]}",
          "tags" => [
        [0] "_jsonparsefailure"
    ],
    "@timestamp" => 2019-06-08T11:21:21.607Z,
       "appname" => "%{[parsedJson][application]}",
       "message" => "'{applicationname:app2,timestamp:07/06/2019 12:40:40,errormsg:Error at line 1}'",
       "headers" => {
           "request_path" => "/",
        "http_user_agent" => "curl/7.55.1",
           "content_type" => "application/x-www-form-urlencoded",
              "http_host" => "localhost:8080",
         "content_length" => "79",
            "http_accept" => "*/*",
         "request_method" => "POST",
           "http_version" => "HTTP/1.1"
    },
      "@version" => "1",
          "host" => "127.0.0.1"
}

预期输出为：

appname：app2 tst：07/06/2019 12:40:40 msg：第1行出现错误

应在Elasticsearch中使用“ appname-tst”创建索引。