When using 'mage/storage'.post() in admin and passing 'form_key' in json encoded, condition isn't fulfilled

[robertd-eclipse]

When sending data

JSON.stringify({
...
        form_key: form_key
...
})

in 'mage/storage'.post(url, data) to the REST endpoint

the form_key isn't found because it is searching for 'form_key=' and not 'form_key'

magento2/lib/web/mage/backend/bootstrap.js

Line 46 in 0a834cc

settings.data.indexOf('form_key=') === -1) {

and it is adding to the encoded json string '{}'&form_key=xyz, what makes an exception in
[64 line] \Magento\Framework\Webapi\Rest\Request\Deserializer\decodedBody

To bypass this I have added in data

JSON.stringify({
...
       'form_key=': form_key
...
})

is there a reason why in
lib/web/mage/backend/bootstrap.js#L46 it is comparing 'form_key=' and not just 'form_key'?

[m2-assistant]

Hi @robertd-eclipse. Thank you for your report.
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[m2-assistant]

Hi @engcom-November. Thank you for working on this issue.
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[github-jira-sync-bot]

Unfortunately, not enough information was provided to create a Jira ticket. Please make sure you added the following label(s): Reproduced on 2.4.x, ^Area:.*

Once all required labels are present, please add Issue: Confirmed label again.

[engcom-November]

Hello @robertd-eclipse,

Thank you for the report and collaboration!

By looking into the codebase it seems the issue can be reproduced.
Hence confirming the issue.

Thank you.

[github-jira-sync-bot]

Unfortunately, not enough information was provided to create a Jira ticket. Please make sure you added the following label(s): Reproduced on 2.4.x, ^Area:.*

Once all required labels are present, please add Issue: Confirmed label again.