# How to Parse Json http body from a POST request with tcp plugin

**URL:** <https://discuss.elastic.co/t/how-to-parse-json-http-body-from-a-post-request-with-tcp-plugin/240565>\
**Category:** Logstash\
**Created:** [July 9, 2020, 4:16pm UTC](https://discuss.elastic.co/t/how-to-parse-json-http-body-from-a-post-request-with-tcp-plugin/240565 "2020-07-09T16:16:13Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![Bouraoui\_Kacem](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bouraoui_kacem/32/44744_2.png) [@Bouraoui\_Kacem](https://discuss.elastic.co/u/Bouraoui_Kacem)\
**Post date:** [July 9, 2020, 4:16pm UTC](https://discuss.elastic.co/t/how-to-parse-json-http-body-from-a-post-request-with-tcp-plugin/240565/1 "2020-07-09T16:16:13Z")

</div>

I send a Post request with a json content from PostMan to logstash pipeline with an input tcp plugin , the model of my data is like :

```auto
{
 "results:[
   values :"\"{..json object.. }\""

 ]
 }

```

my logstahs input is :

````
```
input{
        tcp {
            port => 433
			codec => "json"
		}
}

````

````auto
and the filter logstash is like : 

 ```
 filter{
     split { field => "[results]" }
     json { source => "[results][value]"}
 }

````

But I have the error message from logstash :

```auto
   [2020-07-09T18:11:01,432][WARN][logstash.filters.split] Only String and Array types are 
    splittable. field:[results] is of type = NilClass
   [2020-07-09T18:11:01,462][ERROR][logstash.codecs.json] JSON parse error, original data now 
   in message field {:error=>#<LogStash::Json::ParserError: incompatible json object 
   type=java.lang.String , only hash map or arrays are supported>, 
   :data=>"\"pageRank\\\":\\\"2\\\",\\\"model\\\":\\\"PI\\\",\\\"data\\\" 
{}}],\\\"file\\\":\\\"doc.pdf\\\",\\\"hashtype\\\":\\\"sha256\\\",\\\"hash\\\":

```

how can i resolve that please and transform the values String to a json please ?

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [July 9, 2020, 4:37pm UTC](https://discuss.elastic.co/t/how-to-parse-json-http-body-from-a-post-request-with-tcp-plugin/240565/2 "2020-07-09T16:37:13Z")

</div>

The tcp input processes lines as events. If your JSON object is spread across multiple lines that is not going to work.

---

<div class="post-metadata">

**Author:** ![Bouraoui\_Kacem](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bouraoui_kacem/32/44744_2.png) [@Bouraoui\_Kacem](https://discuss.elastic.co/u/Bouraoui_Kacem)\
**Post date:** [July 9, 2020, 5:00pm UTC](https://discuss.elastic.co/t/how-to-parse-json-http-body-from-a-post-request-with-tcp-plugin/240565/3 "2020-07-09T17:00:37Z")

</div>

Hi Badger So i have to transform to plain and delete all the \n ?

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [July 9, 2020, 5:04pm UTC](https://discuss.elastic.co/t/how-to-parse-json-http-body-from-a-post-request-with-tcp-plugin/240565/4 "2020-07-09T17:04:56Z")

</div>

That should help.

---

<div class="post-metadata">

**Author:** ![Bouraoui\_Kacem](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bouraoui_kacem/32/44744_2.png) [@Bouraoui\_Kacem](https://discuss.elastic.co/u/Bouraoui_Kacem)\
**Post date:** [July 23, 2020, 8:19am UTC](https://discuss.elastic.co/t/how-to-parse-json-http-body-from-a-post-request-with-tcp-plugin/240565/5 "2020-07-23T08:19:30Z")

</div>

I used the http input plugin

```auto
   input {
           tcp {
                port => 433
    		}
        }
    filter{
               split { field => "[results]" }
               json { source => "[results][value]"}
           }   

```

and it works , i don't recommend to use tcp in this use case

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 20, 2020, 8:19am UTC](https://discuss.elastic.co/t/how-to-parse-json-http-body-from-a-post-request-with-tcp-plugin/240565/6 "2020-08-20T08:19:35Z")

</div>

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