React Native: Failed to execute 'append' on 'FormData': parameter 2 is not of type 'Blob'. at new ApolloError - react-native

Question

I am trying to upload image from my react native app to graphql by using Apollo client with createUploadLink(). When I am trying to mutate data by passing a ReactNativeFile as a variable, then it says
"network request failed: Failed to execute 'append' on 'FormData': parameter 2 is not of type 'Blob'. at new ApolloError ".
This this the mutation which i am trying to use
mutation publishPost(
$content: String!
$LocationInput: LocationInput!
$InputPostAttachment: [InputPostAttachment!]
) {
publishPost(
content: $content
location: $LocationInput
attachments: $InputPostAttachment
) {
content
}
}
InputPostAttachment has type
type InputPostAttachment {
type: PostAttachmentType!
file: Upload!
}
Apollo client settings and i am using apollo-upload-client
const httpLink = createUploadLink({
uri: 'http://localhost:8000/graphql',
});
const authLink = setContext(async (headers: any) => {
const token = await getToken();
return {
...headers,
headers: {
authorization: token ? `Bearer ${token}` : null,
},
};
});
const link = authLink.concat(httpLink);
// create an inmemory cache instance for caching graphql data
const cache = new InMemoryCache();
// instantiate apollo client with apollo link instance and cache instance
export const client = new ApolloClient({
link,
cache,
});
File upload Function and i am using react-native-image-crop-picker for multi image selection
const [image, setimage] = useState([]);
const _pickImage = () => {
ImagePicker.openPicker({
includeBase64: true,
multiple: true,
}).then((images: any) => {
let imageData: any = [];
images.map((data: any) => {
const file = new ReactNativeFile({
uri: data.path,
name: data.filename,
type: data.mime,
});
imageData.push({
type: 'IMAGE',
file: file,
});
});
setimage(imageData);
console.log(images);
});
};
const handlePost = async () => {
const InputPostAttachment: any = [...image];
const LocationInput = {
place: place,
vicinity: vicinity,
province: province,
};
publishPost({variables: {content, LocationInput, InputPostAttachment}})
.then(({data}) => {
console.log(data);
props.navigation.navigate('Home');
})
.catch((err) => {
console.log('err happened');
console.log(err);
});
};
could someone please help me out from this?

Answer 1

In addition to the chrome debugger issue, this error also happens on the expo web.
To anyone uploading images on expo web (or react-native web), here's a working solution:
/** Load image from camera/roll. */
const result = await ImagePicker.launchImageLibraryAsync({
mediaTypes: ImagePicker.MediaTypeOptions.All,
allowsEditing: true,
quality: 1,
});
if (result.cancelled) {
return;
}
/** web platform: blob. */
const convertBase64ToBlob = async (base64) => {
const response = await fetch(base64);
const blob = await response.blob();
return blob;
};
/** android/ios platform: ReactNativeFile.*/
const createReactNativeFile = (uri) => {
const file = new ReactNativeFile({
uri,
type: mime.lookup(uri) || 'image',
name: `file-${Date.now()}`,
});
return file;
};
/** Use blob for web, ReactNativeFile otherwise. */
const file = Platform.OS === 'web'
? await convertBase64ToBlob(result.uri)
: createReactNativeFile(result.uri);
/** Upload image with apollo. */
mutate({ variables: { file } });
On the web platform, ImagePicker returns a base64 value instead of a file path. This problem doesn't happen if the platform is Android or iOS, as ImagePicker returns a file path, which is expected by apollo-upload-client.
The solution is to detect if the URI is base64 (which happens when the platform is "web") and convert it to a blob.

Answer 2

My apollo-client was configured using apollo-boost and i was using chrome debugger to intercept the network was causing me this issue.
To be more specific I was using the below code to get the network requests sent by my app in the chrome debugger
global.XMLHttpRequest =
global.originalXMLHttpRequest || global.XMLHttpRequest;
global.FormData = global.originalFormData || global.FormData;
if (window.FETCH_SUPPORT) {
window.FETCH_SUPPORT.blob = false;
} else {
global.Blob = global.originalBlob || global.Blob;
global.FileReader = global.originalFileReader || global.FileReader;
}
apollo-upload-client wont send the data in multipart data if we are using chrome debugger. We will face network issue.This issue has the answer. or I had not removed apollo-boost and some part of my app was using it that was also a issue.