# 56. Upload photos

Uploading a photo via S3 contains 2 steps:

1. **Request the pre-signed link for further direct upload.** 

As input: 

* fileExtention - jpeg OR jpg OR png, 
* farmUuid - uuid of the farm,
* fieldUuid - uuid of the field,
* noteUuid - uuid of the note for the direct link of the uploaded photo,
* commentUuid - uuid of the comment for the direct link of the uploaded photo (optional). 

As output:

* uuid - the expected uuid after the upload and processing,
* farmUuid - the same as input,
* fieldUuid - the same as input,
* noteUuid - the same as input,
* commentUuid - the same as input (if existed),
* s3Url - the URL used to upload the photo,
* s3Fields - attributes to pass in the upload photo form.

The details of how to use s3Url and s3Fields are described in the second step. 

The attributes are valid for only 60 mins to upload the photo.

{% code overflow="wrap" lineNumbers="true" %}

```graphql
mutation generatePresignedPostPhotoData {
  generatePresignedPostPhotoData(input:{
    farmUuid: "89196056-61e5-4bce-b676-d488d611a829" 
    fieldUuid: "586a2ef2-03e4-4715-846c-07a2f0cb3016"
    noteUuid: "4a94da1c-f655-4f17-961a-4b0323e5129c"
    fileExtention: jpeg
    
  } ) {
    uuid
    noteUuid
    fieldUuid
    farmUuid
    s3Url
    s3Fields
  }
}
```

{% endcode %}

2. **Send a local photo to s3Url with predefined form attributes from s3Fields.**

{% code overflow="wrap" lineNumbers="true" %}

```bash
curl --location --request POST '<s3Url>' \
--form 'key="<value_in_s3Fields>"' \
--form 'AWSAccessKeyId="<value_in_s3Fields>"' \
--form 'x-amz-security-token="<value_in_s3Fields>"' \
--form 'policy="<value_in_s3Fields>"' \
--form 'signature="<value_in_s3Fields>"' \
--form 'file=@"<local_file_path>"'
```

{% endcode %}

Notifications about the processing will be delivered via the subscription mechanism described in GraphQL -> Samples -> [1. Subscription: Get events](https://docs.geopard.tech/geopard-tutorials/api-docs/requests-overview/1.-subscription-get-events).

{% hint style="info" %}
Use ‘Accept-Encoding’:’gzip, deflate, br’.
{% endhint %}