My code:
const file = {
uri: this.state.imageSource,
name: this.state.imageName,
type: 'image/jpg',
};
const data = new FormData();
data.append('file', file);
fetch(config.server + '/upload', {
method: 'POST',
body: data,
})
.then((res) => res.json())
.then((responseData) => {
alert(JSON.stringify(responseData));
})
.catch((err) => {
alert(err);
});
Without FormData code doesnt display error. What I should do to fix? Debugging on android.
The error was because I was passing in the url as an array but it expected a string.
I was getting this error because my URL was incorrect
This will resolve the issue :
alert(JSON.stringify(data))
In my case I was not running the api server.
I also faced the same issue and the below line of code can be a solution.
var formdata = new FormData();
formdata.append("mobile", phonenumber);
var requestOptions = {
method: 'POST',
body: formdata,
redirect: 'follow'
};
fetch("http://your_url", requestOptions)
.then(response => response.text())
.then(result => console.log(result))
.catch(error => console.log('error', error));
react-native link
Use this command to resolve this issue. This worked for me.
Note : Only for react-native < 60.x