---
id: 32a5fe4f-0ccd-405c-b813-efb9793e4e82
---

# Nginx Content-Type Mismatch Incident
---

The Nginx Content-Type Mismatch Incident refers to a situation in which the Content-Type header mismatches, which can affect the rendering of content in web browsers. This incident can lead to unexpected rendering or display issues on websites or web applications. To prevent mismatches, it is important to ensure that the Content-Type header is correctly set for web resources.

### Parameters
```shell
export URL="PLACEHOLDER"

export PATH_TO_SERVER_CONFIGURATION_FILE="PLACEHOLDER"

export CORRECT_CONTENT_TYPE="PLACEHOLDER"
```

## Debug

### Check the Nginx configuration file for any misconfigurations
```shell
sudo nginx -t
```

### Check the response headers of a web resource to verify the Content-Type header
```shell
curl -I ${URL}
```

### Check the server logs for any errors related to the Content-Type header
```shell
sudo tail -f /var/log/nginx/access.log | grep 'content-type'
```

### Check the server logs for any errors related to the Nginx configuration
```shell
sudo tail -f /var/log/nginx/error.log | grep 'content-type'
```

### Check the Nginx version to ensure it is up-to-date
```shell
nginx -v
```

## Repair

### Update the server configuration: If the Content-Type header is not set correctly, update the server configuration to ensure that the header is set correctly for all web resources.
```shell


#!/bin/bash



# Set the correct Content-Type header for web resources in the server configuration file



CONFIG_FILE=${PATH_TO_SERVER_CONFIGURATION_FILE}

content_type=${CORRECT_CONTENT_TYPE}



# Check if the configuration file exists

if [ ! -f "$CONFIG_FILE" ]; then

  echo "ERROR: Configuration file not found: $CONFIG_FILE"

  exit 1

fi



# Create a backup for the configuration file

cp $CONFIG_FILE $CONFIG_FILE.bak



# Update the configuration file

sed -i "s/^#*$add_header Content-Type.*$/add_header Content-Type \"$content_type\";/" "$CONFIG_FILE"



# Restart the server

systemctl restart nginx



echo "Server configuration updated successfully"
```

The Nginx Content-Type Mismatch Incident refers to a situation in which the Content-Type header mismatches, which can affect the rendering of content in web browsers. This incident can lead to unexpected rendering or display issues on websites or web applications. To prevent mismatches, it is important to ensure that the Content-Type header is correctly set for web resources.


```shell
export URL="PLACEHOLDER"

export PATH_TO_SERVER_CONFIGURATION_FILE="PLACEHOLDER"

export CORRECT_CONTENT_TYPE="PLACEHOLDER"
```


### Check the Nginx configuration file for any misconfigurations

```shell
sudo nginx -t
```

### Check the response headers of a web resource to verify the Content-Type header

```shell
curl -I ${URL}
```

### Check the server logs for any errors related to the Content-Type header

```shell
sudo tail -f /var/log/nginx/access.log | grep 'content-type'
```

### Check the server logs for any errors related to the Nginx configuration

```shell
sudo tail -f /var/log/nginx/error.log | grep 'content-type'
```

### Check the Nginx version to ensure it is up-to-date

```shell
nginx -v
```


### Update the server configuration: If the Content-Type header is not set correctly, update the server configuration to ensure that the header is set correctly for all web resources.

```shell


#!/bin/bash



# Set the correct Content-Type header for web resources in the server configuration file



CONFIG_FILE=${PATH_TO_SERVER_CONFIGURATION_FILE}

content_type=${CORRECT_CONTENT_TYPE}



# Check if the configuration file exists

if [ ! -f "$CONFIG_FILE" ]; then

  echo "ERROR: Configuration file not found: $CONFIG_FILE"

  exit 1

fi



# Create a backup for the configuration file

cp $CONFIG_FILE $CONFIG_FILE.bak



# Update the configuration file

sed -i "s/^#*$add_header Content-Type.*$/add_header Content-Type \"$content_type\";/" "$CONFIG_FILE"



# Restart the server

systemctl restart nginx



echo "Server configuration updated successfully"
```


Nginx Content-Type Mismatch Incident

Overview

Parameters

Debug

Check the Nginx configuration file for any misconfigurations

Check the response headers of a web resource to verify the Content-Type header

Check the Nginx version to ensure it is up-to-date

Repair

Update the server configuration: If the Content-Type header is not set correctly, update the server configuration to ensure that the header is set correctly for all web resources.

Learn more

Related Runbooks

Support