116 lines
2.5 KiB
JavaScript
116 lines
2.5 KiB
JavaScript
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
* @format
|
|
* @noflow
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
var React = require('react');
|
|
var ReactNative = require('react-native');
|
|
var {StyleSheet, Text, TouchableHighlight, View} = ReactNative;
|
|
|
|
class XHRExampleHeaders extends React.Component {
|
|
xhr: XMLHttpRequest;
|
|
cancelled: boolean;
|
|
|
|
constructor(props) {
|
|
super(props);
|
|
this.cancelled = false;
|
|
this.state = {
|
|
status: '',
|
|
headers: '',
|
|
contentSize: 1,
|
|
downloaded: 0,
|
|
};
|
|
}
|
|
|
|
download() {
|
|
this.xhr && this.xhr.abort();
|
|
|
|
var xhr = this.xhr || new XMLHttpRequest();
|
|
xhr.onreadystatechange = () => {
|
|
if (xhr.readyState === xhr.DONE) {
|
|
if (this.cancelled) {
|
|
this.cancelled = false;
|
|
return;
|
|
}
|
|
if (xhr.status === 200) {
|
|
this.setState({
|
|
status: 'Download complete!',
|
|
headers: xhr.getAllResponseHeaders(),
|
|
});
|
|
} else if (xhr.status !== 0) {
|
|
this.setState({
|
|
status:
|
|
'Error: Server returned HTTP status of ' +
|
|
xhr.status +
|
|
' ' +
|
|
xhr.responseText,
|
|
});
|
|
} else {
|
|
this.setState({
|
|
status: 'Error: ' + xhr.responseText,
|
|
});
|
|
}
|
|
}
|
|
};
|
|
xhr.open(
|
|
'GET',
|
|
'https://httpbin.org/response-headers?header1=value&header2=value1&header2=value2',
|
|
);
|
|
xhr.send();
|
|
this.xhr = xhr;
|
|
|
|
this.setState({status: 'Downloading...'});
|
|
}
|
|
|
|
componentWillUnmount() {
|
|
this.cancelled = true;
|
|
this.xhr && this.xhr.abort();
|
|
}
|
|
|
|
render() {
|
|
var button =
|
|
this.state.status === 'Downloading...' ? (
|
|
<View style={styles.wrapper}>
|
|
<View style={styles.button}>
|
|
<Text>...</Text>
|
|
</View>
|
|
</View>
|
|
) : (
|
|
<TouchableHighlight
|
|
style={styles.wrapper}
|
|
onPress={this.download.bind(this)}>
|
|
<View style={styles.button}>
|
|
<Text>Get headers</Text>
|
|
</View>
|
|
</TouchableHighlight>
|
|
);
|
|
|
|
return (
|
|
<View>
|
|
{button}
|
|
<Text>{this.state.headers}</Text>
|
|
</View>
|
|
);
|
|
}
|
|
}
|
|
|
|
var styles = StyleSheet.create({
|
|
wrapper: {
|
|
borderRadius: 5,
|
|
marginBottom: 5,
|
|
},
|
|
button: {
|
|
backgroundColor: '#eeeeee',
|
|
padding: 8,
|
|
},
|
|
});
|
|
|
|
module.exports = XHRExampleHeaders;
|