[Android] FormData does not support data URIs

[mxhold]

React Native version: Expo 33 / React Native 0.59.8

Steps To Reproduce

1. Call formData.append with a data URI as the uri
2. Make XHR request and send FormData

const dataUri = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVQYV2NgYAAAAAMAAWgmWQ0AAAAASUVORK5CYII=';
const formData = new FormData();
formData.append('file', {
  name: 'myfile',
  type: 'image/png',
  uri: dataUri,
});

const request = new XMLHttpRequest();
request.open('POST', 'http://httpbin.org/post');
request.onreadystatechange = function() {
  if (request.readyState === 4) {
    if (request.status === 200) {
      console.log("SUCCESS")
      // will succeed on iOS
    } else {
      console.log(request.responseText);
      // response on Android will be "Could not retrieve file for uri data:image/png;base64,iVBO..."
    }
  }
};
request.send(formData);

Describe what you expected to happen:

The request would succeed (as it does on iOS) but instead (on Android only), you get this error:

Could not retrieve file for uri data:image/png;base64,iVB...

Snack: https://snack.expo.io/@maxholderc5/cd0ef5

It appears that the Android implementation assumes this will always be a file, but unless I've misunderstood, passing a data URI here should also be valid (at least, it seems to work on iOS).

A workaround for my specific scenario (in case it is helpful for others running into this) was to write a temporary file and provide its filepath instead of the data URI directly, e.g. with Expo:

const tempFileDirectory = `${FileSystem.cacheDirectory}uploadTmp`
await FileSystem.makeDirectoryAsync(tempFileDirectory, { intermediates: true })
const tempFilePath = `${tempFileDirectory}${Date.now()}.png`
const base64EncodedData = dataUri.split(',')[1]
await FileSystem.writeAsStringAsync(tempFilePath, base64EncodedData, {
  encoding: FileSystem.EncodingType.Base64,
})
// ...
formData.append(name, {
  name: "myfile",
  type: "image/png",
  uri: tempFilePath,
})
// ...
await FileSystem.deleteAsync(tempFilePath)

[zcgit]

Same question, I need to send a memory data as A file.

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as a "Discussion" or add it to the "Backlog" and I will leave it open. Thank you for your contributions.

[Cookizza]

This is still an issue

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as a "Discussion" or add it to the "Backlog" and I will leave it open. Thank you for your contributions.

[mxhold]

This is still an issue

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as a "Discussion" or add it to the "Backlog" and I will leave it open. Thank you for your contributions.

[mxhold]

This is still an issue

[irekrog]

This is still an issue :/

[m7amad-7asan]

This is still an issue

[patrickyyang]

This is still an issue

[Ping5841]

This is still an issue

[evanc]

This is still an issue

[irekrog]

This bug is over a year old. Is anyone from RN team considering solving this bug?

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as a "Discussion" or add it to the "Backlog" and I will leave it open. Thank you for your contributions.

[tlrobinson]

This is still an issue

[glaucopgomes]

This is still an issue

[juanloaiza21]

This is still an issue

[vgorte]

This is still an issue

[jfr3000]

This is still an issue

[anhkieet]

This is still an issue

[dxmv]

This is still an issue

[Mickaz89]

This is still an issue

[pepe-dunamu]

This is still an issue

[hetanthakkar]

I'll work on this issue

[Alireza17224]

Same here