# Upload

Thanks to the plugin Upload, you can upload any kind of file on your server or external providers such as AWS S3.

# Configuration

Currently the Strapi middleware in charge of parsing requests needs to be configured to support file sizes larger than the default of 200MB.

The library we use is koa-body (opens new window), and it uses the node-formidable (opens new window) library to process files.

You can pass configuration to the middleware directly by setting it in the parser middleware configuration in config/middleware.js:

module.exports = {
  //...
  settings: {
    parser: {
      enabled: true,
      multipart: true,
      formidable: {
        maxFileSize: 200 * 1024 * 1024 // Defaults to 200mb
      }
    }
  },
  //...
};

# Responsive Images

When the Enable responsive friendly upload setting is enabled in the settings panel the plugin will generate the following responsive image sizes:

Name	Largest Dimension
large	1000px
medium	750px
small	500px

These sizes can be overridden in config/plugins.js:

module.exports = {
  upload: {
    breakpoints: {
      xlarge: 1920,
      large: 1000,
      medium: 750,
      small: 500,
      xsmall: 64
    }
  }
}

✋ CAUTION

Breakpoint changes will only apply to new images, existing images will not be resized or have new sizes generated.

# Endpoints

Method	Path	Description
GET	/upload/files	Get a list of files
GET	/upload/files/:id	Get a specific file
POST	/upload	Upload files
DELETE	/upload/files/:id	Delete a file

# Upload files

To upload files into your application.

# Parameters

files: The file(s) to upload. The value(s) can be a Buffer or Stream.

# Code example

<form>
  <!-- Can be multiple files -->
  <input type="file" name="files" />
  <input type="submit" value="Submit" />
</form>

<script type="text/javascript">
  const formElement = document.querySelector('form');

  formElement.addEventListener('submit', (e) => {
    e.preventDefault();

    const request = new XMLHttpRequest();

    request.open('POST', '/upload');

    request.send(new FormData(formElement));
  });
</script>

✋ CAUTION

You have to send FormData in your request body.

To upload files that will be linked to a specific entry.

# Request parameters

files: The file(s) to upload. The value(s) can be a Buffer or Stream.
path (optional): The folder where the file(s) will be uploaded to (only supported on strapi-provider-upload-aws-s3).
refId: The ID of the entry which the file(s) will be linked to.
ref: The name of the model which the file(s) will be linked to (see more below).
source (optional): The name of the plugin where the model is located.
field: The field of the entry which the file(s) will be precisely linked to.

# Examples

The Restaurant model attributes:

"attributes": {
  "name": {
    "type": "string"
  },
  "cover": {
    "model": "file",
    "via": "related",
    "plugin": "upload"
  }
}

Code

<form>
  <!-- Can be multiple files if you setup "collection" instead of "model" -->
  <input type="file" name="files" />
  <input type="text" name="ref" value="restaurant" />
  <input type="text" name="refId" value="5c126648c7415f0c0ef1bccd" />
  <input type="text" name="field" value="cover" />
  <input type="submit" value="Submit" />
</form>

<script type="text/javascript">
  const formElement = document.querySelector('form');

  formElement.addEventListener('submit', (e) => {
    e.preventDefault();

    const request = new XMLHttpRequest();

    request.open('POST', '/upload');

    request.send(new FormData(formElement));
  });
</script>

✋ CAUTION

You have to send FormData in your request body.

# Upload file during entry creation

You can also add files during your entry creation.

# Examples

The Restaurant model attributes:

"attributes": {
  "name": {
    "type": "string"
  },
  "cover": {
    "model": "file",
    "via": "related",
    "plugin": "upload"
  }
}

Code

<form>
  <!-- Can be multiple files if you setup "collection" instead of "model" -->
  <input type="text" name="name" />
  <input type="file" name="cover" />
  <input type="submit" value="Submit" />
</form>

<script type="text/javascript">
  const formElement = document.querySelector('form');

  formElement.addEventListener('submit', (e) => {
    e.preventDefault();

    const request = new XMLHttpRequest();

    const formData = new FormData();

    const formElements = formElement.elements;

    const data = {};

    for (let i = 0; i < formElements.length; i++) {
      const currentElement = formElements[i];
      if (!['submit', 'file'].includes(currentElement.type)) {
        data[currentElement.name] = currentElement.value;
      } else if (currentElement.type === 'file') {
        for (let i = 0; i < currentElement.files.length; i++) {
          const file = currentElement.files[i];
          formData.append(`files.${currentElement.name}`, file, file.name);
        }
      }
    }

    formData.append('data', JSON.stringify(data));

    request.open('POST', `${HOST}/restaurants`);

    request.send(formData);
  });
</script>

Your entry data has to be contained in a data key. You have to JSON.stringify your data object.

And for your files, they have to be prefixed by files. Example here with cover attribute files.cover.

💡 TIP

If you want to upload files for a component, you will have to specify the index of the item you want to add the file to. Example files.my_component_name[the_index].attribute_name

✋ CAUTION

You have to send FormData in your request body.

# Models definition

Adding a file attribute to a model (or the model of another plugin) is like adding a new association.

In the first example below, you will be able to upload and attach one file to the avatar attribute.

Path — User.settings.json.

{
  "connection": "default",
  "attributes": {
    "pseudo": {
      "type": "string",
      "required": true
    },
    "email": {
      "type": "email",
      "required": true,
      "unique": true
    },
    "avatar": {
      "model": "file",
      "via": "related",
      "plugin": "upload"
    }
  }
}

In our second example, you can upload and attach multiple pictures to the restaurant.

Path — Restaurant.settings.json.

{
  "connection": "default",
  "attributes": {
    "name": {
      "type": "string",
      "required": true
    },
    "convers": {
      "collection": "file",
      "via": "related",
      "plugin": "upload"
    }
  }
}

# Using a provider

By default Strapi provides a provider that uploads files to a local directory. You might want to upload your files to another provider like AWS S3.

You can check all the available providers developed by the community on npmjs.org - Providers list (opens new window)

To install a new provider run:

# Local server

By default Strapi accepts localServer configurations for locally uploaded files. They will be passed as the options for koa-static (opens new window).

You can provide them by create or edit the file at ./config/plugins.js. The example below set max-age header.

module.exports = ({ env })=>({
  upload: {
    providerOptions: {
      localServer: {
        maxage: 300000
      }
    }
  }
});

# Using scoped packages as providers

If your package name is scoped (opens new window) (for example @username/strapi-provider-upload-aws2) you need to take an extra step by aliasing it in package.json. Go to the dependencies section and change the provider line to look like this:

"strapi-provider-upload-aws2": "npm:@username/strapi-provider-upload-aws2@0.1.9"

The string after the last @ represents your desired semver (opens new window) version range.

# Enabling the provider

To enable the provider, create or edit the file at ./config/plugins.js

module.exports = ({ env }) => ({
  upload: {
    provider: 'aws-s3',
    providerOptions: {
      accessKeyId: env('AWS_ACCESS_KEY_ID'),
      secretAccessKey: env('AWS_ACCESS_SECRET'),
      region: 'aws-region',
      params: {
        Bucket: 'my-bucket',
      },
    },
  },
});

Make sure to read the provider's README to know what are the possible parameters.

# Configuration per environment

When configuring your upload provider you might want to change the configuration based on the NODE_ENV environment variable or use environment specific credentials.

You can set a specific configuration in the ./config/env/{env}/plugins.js configuration file and it will be used to overwrite the one in the default configuration.

# Create providers

You can create a Node.js module to implement a custom provider. Read the official documentation here (opens new window).

To work with strapi, your provider name must match the pattern strapi-provider-upload-{provider-name}.

Your provider need to export the following interface:

module.exports = {
  init(providerOptions) {
    // init your provider if necessary

    return {
      upload(file) {
        // upload the file in the provider
      },
      delete(file) {
        // delete the file in the provider
      },
    };
  },
};

You can then publish it to make it available to the community.

# Create a local provider

If you want to create your own provider without publishing it on npm you can follow these steps:

Create a ./providers/strapi-provider-upload-{provider-name} folder in your root application folder.
Create your provider as explained in the documentation above.
Then update your package.json to link your strapi-provider-upload-{provider-name} dependency to point to the local path (opens new window) of your provider.

{
  ...
  "dependencies": {
    ...
    "strapi-provider-upload-{provider-name}": "file:providers/strapi-provider-upload-{provider-name}"
    ...
  }
}

Finally, run yarn install or npm install to install your new custom provider.

← Internationalization (i18n) Users & Permissions →

# Upload

# Configuration

# Responsive Images

# Endpoints

# Upload files

# Parameters

# Code example

# Upload files related to an entry

# Request parameters

# Examples

# Upload file during entry creation

# Examples

# Models definition

# Using a provider

# Local server

# Using scoped packages as providers

# Enabling the provider

# Configuration per environment

# Create providers

# Create a local provider