I'm a junior developer that's fairly new to using Facebook for Developers. I'm hitting a wall with the ReactJs application I'm building and could use your help!
My boss has requested a Grid representation of the Page Plugin, not the actual Plugin itself. For this project, he's requested I make and use a test 'Page' I've found that DevExtreme's Data Grid seems to be the best option in terms of the desired visual, and I'm trying to call my Facebook Page using the Graph API documentation. I know it's hitting at least the area I want it to with my console.log because it's returning the error message.
Here are the errors my browser is returning:
Access to fetch at 'https://www.facebook.com/Feeds-Tester-170107151801959/' from origin 'https://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
GET https://www.facebook.com/Feeds-Tester-170107151801959/ net::ERR_FAILED
The link you'll see referenced in my URL variable has been triple checked to be the correct link. Since I'm using NodeJS, I tried installing the CORS npm package but I'm not 100% sure where to put it to use it, I'm wondering if that's the cause of the issue?
Here's my full code snippet (I'm using VS Code, if that helps):
/*global FB*/
import React from 'react';
import { DataGrid, Editing, Scrolling, Lookup, Summary, TotalItem } from 'devextreme-react/data-grid';
import { Button } from 'devextreme-react/button';
import { SelectBox } from 'devextreme-react/select-box';
import CustomStore from 'devextreme/data/custom_store';
import { formatDate } from 'devextreme/localization';
import 'whatwg-fetch';
const URL = 'https://www.facebook.com/Feeds-Tester-170107151801959/';
const REFRESH_MODES = ['full', 'reshape', 'repaint'];
class Grid extends React.Component {
constructor(props) {
super(props);
this.state = {
fbData: null,
ordersData: new CustomStore({
key: 'OrderID',
load: () => this.sendRequest(`${URL}`, 'GET'),
}),
requests: [],
refreshMode: 'reshape'
};
this.clearRequests = this.clearRequests.bind(this);
this.handleRefreshModeChange = this.handleRefreshModeChange.bind(this);
var body = 'Reading JS SDK documentation';
FB.api('/me/feed', 'post', { message: body }, function(response) {
if (!response || response.error) {
console.log('Error occured');
} else {
console.log('Post ID: ' + response.id);
}
})
}
sendRequest(url, method, data) {
method = method || 'GET';
data = data || {};
this.logRequest(method, url, data);
if(method === 'GET') {
return fetch(url, {
method: method,
credentials: 'include',
headers: {
'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',
'Access-Control-Allow-Origin': '*'
}
}).then(result => result.json().then(json => {
if(result.ok) return json.data;
throw json.Message;
}));
}
const params = Object.keys(data).map((key) => {
return `${encodeURIComponent(key) }=${ encodeURIComponent(data[key])}`;
}).join('&');
return fetch(url, {
method: method,
body: params,
headers: {
'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8'
},
credentials: 'include'
}).then(result => {
if(result.ok) {
return result.text().then(text => text && JSON.parse(text));
} else {
return result.json().then(json => {
throw json.Message;
});
}
});
}
logRequest(method, url, data) {
const args = Object.keys(data || {}).map(function(key) {
return `${key }=${ data[key]}`;
}).join(' ');
const time = formatDate(new Date(), 'HH:mm:ss');
const request = [time, method, url.slice(URL.length), args].join(' ');
this.setState((state) => {
return { requests: [request].concat(state.requests) };
});
}
clearRequests() {
this.setState({ requests: [] });
}
handleRefreshModeChange(e) {
this.setState({ refreshMode: e.value });
}
render() {
const { refreshMode, ordersData } = this.state;
return (
<React.Fragment>
<DataGrid
id="grid"
showBorders={true}
dataSource={ordersData}
repaintChangesOnly={true}
>
<Editing
refreshMode={refreshMode}
mode="cell"
allowAdding={true}
allowDeleting={true}
allowUpdating={true}
/>
<Scrolling
mode="virtual"
/>
<Lookup dataSource={ordersData} valueExpr="Value" displayExpr="Text" />
<Summary>
{/* <TotalItem column="CustomerID" summaryType="count" />
<TotalItem column="Freight" summaryType="sum" valueFormat="#0.00" /> */}
</Summary>
</DataGrid>
<div className="options">
<div className="caption">Options</div>
<div className="option">
<span>Refresh Mode: </span>
<SelectBox
value={refreshMode}
items={REFRESH_MODES}
onValueChanged={this.handleRefreshModeChange}
/>
</div>
<div id="requests">
<div>
<div className="caption">Network Requests</div>
<Button id="clear" text="Clear" onClick={this.clearRequests} />
</div>
<ul>
{this.state.requests.map((request, index) => <li key={index}>{request}</li>)}
</ul>
</div>
</div>
</React.Fragment>
);
}
}
export default Grid;This is the link to the docs for the module I'm trying to reference
I'm trying to not bite off more than I can chew and just start with retrieving the data before I even think about manipulating it or sending any in return. Any insight or guidance you can provide would be greatly appreciated. Thank you!! :)
