Upload base64 image in react native API request - reactjs

Question

I tried to upload a base64 image cropped to 600,400 and when i do the request its tell me unexpected token '>' but when i do an upload from an image cropped 20,20 the api call works. So its a problem of length of the base64 it seems that i cannot be to large I also tried to encoded but is large too the 600,400. So i have to resign myself to send a small image or there is another way.
This is my code of the image:
ImagePicker.openPicker({
width: 600,
height: 400,
cropping: true,
includeBase64: true
}).then(image => {
uploadPictureVar = 'data:image/jpeg;base64,' + image.data;
window.picture = uploadPictureVar;
this.setState({ uploadPicture: uploadPictureVar });
});
And this is my api call
export function uploadPost(post) {
let data = {
body: post.body,
picture: post.picture,
type: post.type,
user: {
_id: post.user._id,
name: post.user.name,
picture: post.user.picture
}
}
var headers = {
'Content-Type': 'application/json',
'Access-Control-Origin': '*'
}
return fetch(URL + "/uploadPost", {
method: "post",
headers: headers,
body: JSON.stringify(data)
})
.then(response => Promise.resolve(response.json()))
.catch(err => {
return Promise.reject(err);
})
}
Thanks

Answer 1

Is it possible to use the Chrome inspector to see the response you're getting back from the server. Maybe the backend is throwing an error and rendering a HTML page, hence the error... Unexpected '<'. I'm guessing you're trying parse JSON but you got a HTML response instead.

Answer 2

I could solved it using this plugin : https://github.com/bamlab/react-native-image-resizer
This is my code:
ImageResizer.createResizedImage(window.picture, 600, 400, "PNG", 100, 0, null).then((response) => {
alert(response)
bodySendNewPost.picture = response.uri;
// response.uri is the URI of the new image that can now be displayed, uploaded...
// response.path is the path of the new image
// response.name is the name of the new image with the extension
// response.size is the size of the new image
}).catch((err) => {
alert(err)
// Oops, something went wrong. Check that the filename is correct and
// inspect err to get more details.
});