Flag of Ukraine

Export files to Google Storage

The /google/store Robot exports encoding results to Google Storage.

The URL to the exported file in your Google bucket will be presented in the Transloadit Assembly Status JSON. This Robot can also be used to export encoded files to Google's Firebase as demonstrated in this blogpost.

Parameters

  • use

    String / Array of Strings / Object required

    Specifies which Step(s) to use as input.

    • You can pick any names for Steps except ":original" (reserved for user uploads handled by Transloadit)

    • You can provide several Steps as input with arrays:

      "use": [
        ":original",
        "encoded",
        "resized"
      ]
      

    💡 That’s likely all you need to know about use, but you can view advanced use cases:

    › Advanced use cases
    • Step bundling. Some Robots can gather several Step results for a single invocation. For example, the /file/compress Robot would normally create one archive for each file passed to it. If you'd set bundle_steps to true, however, it will create one archive containing all the result files from all Steps you give it. To enable bundling, provide an object like the one below to the use parameter:

      "use": {
        "steps": [
          ":original",
          "encoded",
          "resized"
        ],
        "bundle_steps": true
      }
      

      This is also a crucial parameter for the /video/adaptive Robot, otherwise you'll generate 1 playlist for each viewing quality.
      Keep in mind that all input Steps must be present in your Template. If one of them is missing (for instance it is rejected by a filter), no result is generated because the Robot waits indefinitely for all input Steps to be finished.

      Here’s a demo that showcases Step bundling.

    • Group by original. Sticking with the /file/compress Robot example, you can set group_by_original to true, in order to create a separate archive for each of your uploaded or imported files, instead of creating one archive containing all originals (or one per resulting file). This is important for for the /media/playlist Robot where you'd typically set:

      "use": {
        "steps": [
          "segmented"
        ],
        "bundle_steps": true,
        "group_by_original": true
      }
      
    • Fields. You can be more discriminatory by only using files that match a field name by setting the fields property. When this array is specified, the corresponding Step will only be executed for files submitted through one of the given field names, which correspond with the strings in the name attribute of the HTML file input field tag for instance. When using a back-end SDK, it corresponds with myFieldName1 in e.g.: $transloadit->addFile('myFieldName1', './chameleon.jpg').

      This parameter is set to true by default, meaning all fields are accepted.

      Example:

      "use": {
        "steps": [ ":original" ],
        "fields": [ "myFieldName1" ]
      }
      
    • Use as. Sometimes Robots take several inputs. For instance, the /video/merge Robot can create a slideshow from audio and images. You can map different Steps to the appropriate inputs.

      Example:

      "use": {
        "steps": [
          { "name": "audio_encoded", "as": "audio" },
          { "name": "images_resized", "as": "image" }
        ]
      }
      

      Sometimes the ordering is important, for instance, with our concat Robots. In these cases, you can add an index that starts at 1. You can also optionally filter by the multipart field name. Like in this example, where all files are coming from the same source (end-user uploads), but with different <input> names:

      Example:

      "use": {
        "steps": [
          { "name": ":original", "fields": "myFirstVideo", "as": "video_1" },
          { "name": ":original", "fields": "mySecondVideo", "as": "video_2" },
          { "name": ":original", "fields": "myThirdVideo", "as": "video_3" }
        ]
      }
      

      For times when it is not apparent where we should put the file, you can use Assembly Variables to be specific. For instance, you may want to pass a text file to the /image/resize Robot to burn the text in an image, but you are burning multiple texts, so where do we put the text file? We specify it via ${use.text_1}, to indicate the first text file that was passed.

      Example:

      "watermarked": {
        "robot": "/image/resize",
        "use"  : {
          "steps": [
            { "name": "resized", "as": "base" },
            { "name": "transcribed", "as": "text" },
          ],
        },
        "text": [
          {
            "text"  : "Hi there",
            "valign": "top",
            "align" : "left",
          },
          {
            "text"    : "From the 'transcribed' Step: ${use.text_1}",
            "valign"  : "bottom",
            "align"   : "right",
            "x_offset": 16,
            "y_offset": -10,
          }
        ]
      }
      
  • credentials

    String required

    Create a new Google service account. Set its role to "Storage Object Creator". Choose "JSON" for the key file format and download it to your computer. You will need to upload this file when creating your Template Credentials.

    Go back to your Google credentials project and enable the "Google Cloud Storage JSON API" for it. Wait around ten minutes for the action to propagate through the Google network. Grab the project ID from the dropdown menu in the header bar on the Google site. You will also need it later on.

    Now you can set up the storage.objects.create and storage.objects.delete permissions. The latter is optional and only required if you intend to overwrite existing paths.

    To do this from the Google Cloud console, navigate to "IAM & Admin" and select "Roles". From here, select "+CREATE ROLE", enter a name, set the role launch stage as general availability and set the permissions stated above.

    Next, relocate to your storage browser and select the ellipsis on your bucket to edit bucket permissions. From here, select "ADD MEMBER", enter your service account as a new member and select your newly created role.

    Then, create your associated Template Credentials in your Transloadit account and use the name of your Template Credentials as this parameter's value.

  • path

    String ⋅ default: "${unique_prefix}/${file.url_name}"

    The path at which the file is to be stored. This may include any available Assembly Variables.

  • acl

    String ⋅ default: "public-read"

    The permissions used for this file. This can be "public-read", "authenticated-read", "bucket-owner-full-control", "private" or "project-private".

Note: The URLs in the result JSON already point to the file on your target storage platform, so you can just save that URL in your database.

Demos

Related blog posts

Uppy
20% off any plan for the Uppy community
Use the UPPY20 code when upgrading.
Sign up
tus
20% off any plan for the tus community
Use the TUS20 code when upgrading.
Sign up
Product Hunt
20% off any plan for Product Hunters
Use the PRH20 code when upgrading.
Sign up