Why isn't mailchimp API working with fetch? - react-native

Question

I'm trying to add an email address to a mailchimp list I have.
This is for a react native app and I'm trying to implement the request using fetch.
This is my code within the component:
import React, { Component } from 'react';
import { View, Text } from 'react-native';
import { connect } from 'react-redux';
import { emailChanged, nameChanged, addToWaitingList } from '../actions';
import { Card, CardSection, Input, Button, Spinner } from '../components/Auth';
class addToWaitingListForm extends Component {
onEmailChange(text) {
this.props.emailChanged(text);
}
onButtonPress() {
const { email } = this.props;
this.props.addToWaitingList({ email });
}
renderButton() {
if (this.props.loading) {
return <Spinner size="large" />;
}
return (
<Button onPress={this.onButtonPress.bind(this)}>
Keep me in the loop!
</Button>
);
}
render() {
return (
<View>
<Card>
<CardSection>
<Input
placeholder="your name"
onChangeText={this.onNameChange.bind(this)}
value={this.props.name}
/>
</CardSection>
<CardSection>
<Input
placeholder="email#uni.ac.uk"
onChangeText={this.onEmailChange.bind(this)}
value={this.props.email}
/>
</CardSection>
<Text style={styles.errorTextStyle}>
{this.props.error}
</Text>
<CardSection style={{ borderBottomWidth: 0 }}>
{this.renderButton()}
</CardSection>
</Card>
</View>
);
}
}
const mapStateToProps = ({ auth }) => {
const { email, name, error, loading } = auth;
return { email, name, error, loading };
};
export default connect(mapStateToProps, {
emailChanged,
addToWaitingList
})(addToWaitingListForm);
Add this is my action code for interacting with the mailchimp api:
import Router from '../../navigation/Router';
import { getNavigationContext } from '../../navigation/NavigationContext';
export const addToWaitingList = ({ email }) => {
const emailListID = 'e100c8fe03';
fetch(`https://us13.api.mailchimp.com/3.0/lists/${emailListID}/members/`, {
method: 'POST',
body: JSON.stringify({
'email_address': email,
'status': 'subscribed',
'merge_fields': {
'FNAME': 'Urist',
'LNAME': 'McVankab'
}
})
})
.then(() => addSubscriberSuccess())
.catch(error => console.log(error));
};
const addSubscriberSuccess = () => {
getNavigationContext().getNavigator('root').immediatelyResetStack([Router.getRoute('auth')]);
};
Right now, the error I'm just getting back is ExceptionsManager.js:62 Cannot read property 'type' of undefined and Error: unsupported BodyInit type
What does this mean and how can I fix this?

Answer 1

You need to do two things.
First off you need to send the basic authentication via fetch so you cant do "user:pass" You have to convert it with btoa('user:pass').
Then you have to send it with mode: 'no-cors'
let authenticationString = btoa('randomstring:ap-keyxxxxxxx-us9');
authenticationString = "Basic " + authenticationString;
fetch('https://us9.api.mailchimp.com/3.0/lists/111111/members', {
mode: 'no-cors',
method: 'POST',
headers: {
'authorization': authenticationString,
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({
email_address: "dude#gmail.com",
status: "subscribed",
})
}).then(function(e){
console.log("fetch finished")
}).catch(function(e){
console.log("fetch error");
})