# Regarding to add a header " -H 'Content-Type: application/json' "
**URL:** https://discuss.elastic.co/t/regarding-to-add-a-header-h-content-type-application-json/198363
**Category:** Elasticsearch
**Created:** [September 6, 2019, 7:50am UTC](https://discuss.elastic.co/t/regarding-to-add-a-header-h-content-type-application-json/198363 "2019-09-06T07:50:07Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@terrymu](https://discuss.elastic.co/u/terrymu)
#### Post date: [September 6, 2019, 7:50am UTC](https://discuss.elastic.co/t/regarding-to-add-a-header-h-content-type-application-json/198363/1 "2019-09-06T07:50:07Z")
Hi Experts,
I met an issue during modify a parameter from template.
I want to modify a value of parameter which named "total\_fields" in template such like this:
I use curl to input several commands to modify it, but all of them are returned failed and the log shows as below:
```
[admin@HPG5L3 ~]$ curl -XPUT localhost:9200/_template/lsh_nokia_nokiasbc-2019.09 .05 -d ' { "settings" : { "index.mapping.total_fields.limit" : "2000" } }'
{"error":"Content-Type header [application/x-www-form-urlencoded] is not support [admin@HPG5L3 ~]$ curl -XPUT localhost:9200/_template/lsh_nokia_nokiasbc-2019.09.05 -d ' { "settings" : { "index.mapping.total_fields.limit" : "2000" } }'
{"error":"Content-Type header [application/x-www-form-urlencoded] is not supported","status":406}
[admin@HPG5L3 ~]$
[admin@HPG5L3 ~]$
[admin@HPG5L3 ~]$
[admin@HPG5L3 ~]$ curl -XPUT localhost:9200/_template/lsh_nokia_nokiasbc-2019.09.05 -d ' { "default" : { "total_fields.limit" : "3000" } }'
{"error":"Content-Type header [application/x-www-form-urlencoded] is not supported","status":406}
[admin@HPG5L3 ~]$
[admin@HPG5L3 ~]$
[admin@HPG5L3 ~]$ curl -XPUT localhost:9200/_template/lsh_nokia_nokiasbc-2019.09.05 -d ' { "settings" : { "total_fields.limit" : "3000" } }'
{"error":"Content-Type header [application/x-www-form-urlencoded] is not supported","status":406}[admin@HPG5L3 ~]$
[admin@HPG5L3 ~]$
[admin@HPG5L3 ~]$
[admin@HPG5L3 ~]$
[admin@HPG5L3 ~]$ curl -XPUT localhost:9200/_template/lsh_nokia_nokiasbc-2019.09.05 -d '
> {
> "order" : 1,
> "index_patterns": ["lsh_nokia_nokiasbc-2019.09*"],
> "settings" : {
> "index.mapping.total_fields.limit": 3000,
> }
> }'
{"error":"Content-Type header [application/x-www-form-urlencoded] is not supported","status":406}
[admin@HPG5L3 ~]$
```
All of the failed returns are showed as this:
`{"error":"Content-Type header [application/x-www-form-urlencoded] is not supported","status":406}`
I have retrieved the similar issue and find that in elasticsearch 6.0 or high version there is a "Strict Content-Type Checking for Elasticsearch REST Requests"
You can refer to this URL to find the detailed report:
> **[Strict Content-Type Checking for Elasticsearch REST Requests](https://www.elastic.co/fr/blog/strict-content-type-checking-for-elasticsearch-rest-requests)**
>
> Elasticsearch 6.0 will enforce strict content-type checking. All REST requests that include a body must also provide the correct Content-Type header.
In this report, we can see we need do this action to adapt our pattern script
I have followed its indication then add the Content-type by curl command, but it still failed:
```
[admin@HPG5L3 SBClog]$ curl -XPUT localhost:9200/_template/lsh_nokia_nokiasbc-2019.09.05 -H 'Content-Type: application/json'
{"error":{"root_cause":[{"type":"parse_exception","reason":"request body is required"}],"type":"parse_exception","reason":"request body is required"},"status":400}
[admin@HPG5L3 SBClog]$
[admin@HPG5L3 bin]$ curl -XPUT localhost:9200/_template/lsh_nokia_nokiasbc-2019.09.05 -H 'Content-Type: application/json' -d ' { "settings" : { "index.mapping.total_fields.limit" : "2000" } }'
{"error":{"root_cause":[{"type":"action_request_validation_exception","reason":"Validation Failed: 1: index patterns are missing;"}],"type":"action_request_validation_exception","reason":"Validati [admin@HPG5L3 bin]$
[admin@HPG5L3 bin]$
[admin@HPG5L3 bin]$
[admin@HPG5L3 bin]$
[admin@HPG5L3 bin]$
[admin@HPG5L3 bin]$ curl -XGET http://localhost:9200/_cat/indices/?v
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size
yellow open template d4QOtkyhSLyGi9Y3afAh7Q 1 1 0 0 283b 283b
green open .kibana_task_manager 0_fwrwI_TBqCB4gY3-3iPg 1 0 2 4 98.7kb 98.7kb
yellow open lsh_nokia_nokiasbc-2019.09.05 ilVqiOj8S3Sp2a1YIyzYPA 1 1 54 0 330.6kb 330.6kb
green open .kibana_1 3Yjilne2QVO_z83G1UZHkw 1 0 10 3 187.2kb 187.2kb
```
Now my major question is how can I do to add a header " -H 'Content-Type: application/json' " successfully?
Thank you.
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [September 6, 2019, 7:53am UTC](https://discuss.elastic.co/t/regarding-to-add-a-header-h-content-type-application-json/198363/2 "2019-09-06T07:53:32Z")
This is the right way:
```auto
curl -XPUT localhost:9200/_template/lsh_nokia_nokiasbc-2019.09.05 -H 'Content-Type: application/json' -d ' { "settings" : { "index.mapping.total_fields.limit" : "2000" } }'
```
The problem here is that you don't respect the [PUT Template API](https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-templates.html).
---
### Author:  [@terrymu](https://discuss.elastic.co/u/terrymu)
#### Post date: [September 6, 2019, 8:00am UTC](https://discuss.elastic.co/t/regarding-to-add-a-header-h-content-type-application-json/198363/4 "2019-09-06T08:00:52Z")
Hi dadoonet,
Thanks a lot for your reply, but I still can't clear where is the different between my command and you provided, and i have ran your command it still return failed, would you please help me check it? thanks again.
```auto
[admin@HPG5L3 bin]$ curl -XPUT localhost:9200/_template/lsh_nokia_nokiasbc-2019.09.05 -H 'Content-Type: application/json' -d ' { "settings" : { "index.mapping.total_fields.limit" : "2000" } }'
{"error":{"root_cause":[{"type":"action_request_validation_exception","reason":"Validation Failed: 1: index patterns are missing;"}],"type":"action_request_validation_exception","reason":"Validation Failed: 1: index patterns are missing;"},"status":400}
[admin@HPG5L3 bin]$
```
[/quote]
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [September 6, 2019, 8:09am UTC](https://discuss.elastic.co/t/regarding-to-add-a-header-h-content-type-application-json/198363/5 "2019-09-06T08:09:30Z")
```auto
{ "settings" : { "index.mapping.total_fields.limit" : "2000" } }
```
This JSON is not valid for the PUT Template API. Read the documentation I linked to and you will see what Elasticsearch is expecting.
---
### Author:  [@terrymu](https://discuss.elastic.co/u/terrymu)
#### Post date: [September 9, 2019, 2:56am UTC](https://discuss.elastic.co/t/regarding-to-add-a-header-h-content-type-application-json/198363/6 "2019-09-09T02:56:12Z")
Thanks dadoonet,
I have tried to use this command, then command returned true! issue solved!
```
[admin@HPG5L3 bin]$ curl -XPUT http://localhost:9200/lsh_nokia_nokiasbc-2019.09*/_settings/?pretty -H 'Content-Type: application/json' -d ' { "index.mapping.total_fields.limit" : "2000" } '
{
"acknowledged" : true
}
```
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 7, 2019, 2:56am UTC](https://discuss.elastic.co/t/regarding-to-add-a-header-h-content-type-application-json/198363/7 "2019-10-07T02:56:14Z")
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