imagetor

This function download PDF, PNG or JPEG file from the URL provided in the request, save the original file in a bucket on Google Cloud Storage, resize and apply watermark (only on images) where desidered. This function can also delete a file previously saved.

This is a Google Cloud Function. (Node.js 10)
This function accepts only POST requests.
The trigger is an HTTPS endpoint.
This function does NOT create the relative buckets if not present.
You can easily deploy this function via gcloud functions deploy.

For develop this Google Cloud Functions you may need to use the Functions Framework for Node.js.
Remember to have the credentials.json in the root directory of the project.
You have to configure your variables via config.json (See examples section).

Features

• Save original PDF document
• Save original image
• Save resized image
• Overlay watermark based on local images
• Supported input image format: JPEG, PNG
• Supported output image format: JPEG, WebP
• base64 decode for source image
• multiple resize same request
• Supported special headers in the request to download the image

Changelog

v1.3.0

• Node.js 10
• Modified extension accepted in the request. jpg to jpeg
• Bugfix. Response not properly handled.
• Add support to webp format

Examples

Example config.json (Only token property is required)

{
    "mybucketname": {
        "token": "myauthtoken",
        "watermark": "mywatermarkpath",
        "auth_header": {
            "Authorization": "Bearer myauthtoken"
        }
    },
    "mysecondbucket": {
        "token": "mysecondtoken"
    }
}

Delete image

Request:

{
    "action": "del",
    "bucket": "mybucketname",
    "authToken": "myauthtoken",
    "relativePath": "test/ori.jpg"
}

Expected response:

{
    "OK": "deleted"
}

Save image without resizing and without watermark

Request:

{
    "url": "https://images.pexels.com/photos/106399/pexels-photo-106399.jpeg",
    "action": "add",
    "bucket": "mybucketname",
    "extension": "jpeg",
    "authToken": "myauthtoken",
    "originalImageRelativePath": "test/ori.jpg",
    "base64Format": true,
    "watermark": false
}

Expected response:

{
    "OK": [
        {
            "url": "https://storage.googleapis.com/mybucketname/test/ori.jpg"
        }
    ]
}

Save image with resizing and watermark

Request:

{
    "url": "https://images.pexels.com/photos/106399/pexels-photo-106399.jpeg",
    "action": "add",
    "bucket": "mybucketname",
    "extension": "jpeg",
    "authToken": "myauthtoken",
    "originalImageRelativePath": "test/ori.jpg",
    "base64Format": true,
    "watermark": true,
    "watermarkPosition": "center",
    "files": [
    {
        "width": 1154,
        "height": 739,
        "relativePath": "test/image1.jpg"
    },
    {
        "width": 1154,
        "height": 749,
        "relativePath": "test/image2.jpg"
    },
    {
        "width": 1154,
        "height": 759,
        "relativePath": "test/image3.jpg"
    }
    ]
}

Expected response:

{
    "OK": [
        {
            "url": "https://storage.googleapis.com/mybucketname/test/ori.jpg"
        }
    ]
}