150 lines
3.4 KiB
JavaScript
150 lines
3.4 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow strict-local
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*/
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'use strict';
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const React = require('react');
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const ReactNative = require('react-native');
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const {
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Alert,
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Linking,
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Picker,
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StyleSheet,
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Text,
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TouchableHighlight,
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View,
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} = ReactNative;
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const BINARY_TYPES = {
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String,
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ArrayBuffer,
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Int8Array,
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Uint8Array,
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Uint8ClampedArray,
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Int16Array,
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Uint16Array,
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Int32Array,
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Uint32Array,
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Float32Array,
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Float64Array,
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DataView,
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};
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const SAMPLE_TEXT = `
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I am the spirit that negates.
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And rightly so, for all that comes to be
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Deserves to perish wretchedly;
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'Twere better nothing would begin.
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Thus everything that that your terms, sin,
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Destruction, evil represent—
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That is my proper element.
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--Faust, JW Goethe
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`;
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class XHRExampleBinaryUpload extends React.Component<{}, $FlowFixMeState> {
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static handlePostTestServerUpload(xhr: XMLHttpRequest) {
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if (xhr.status !== 200) {
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Alert.alert(
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'Upload failed',
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'Expected HTTP 200 OK response, got ' + xhr.status,
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);
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return;
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}
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if (!xhr.responseText) {
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Alert.alert('Upload failed', 'No response payload.');
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return;
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}
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var index = xhr.responseText.indexOf('http://www.posttestserver.com/');
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if (index === -1) {
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Alert.alert('Upload failed', 'Invalid response payload.');
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return;
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}
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var url = xhr.responseText.slice(index).split('\n')[0];
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console.log('Upload successful: ' + url);
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Linking.openURL(url);
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}
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state = {
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type: 'Uint8Array',
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};
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_upload = () => {
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var xhr = new XMLHttpRequest();
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xhr.open('POST', 'http://posttestserver.com/post.php');
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xhr.onload = () => XHRExampleBinaryUpload.handlePostTestServerUpload(xhr);
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xhr.setRequestHeader('Content-Type', 'text/plain');
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if (this.state.type === 'String') {
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xhr.send(SAMPLE_TEXT);
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return;
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}
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const arrayBuffer = new ArrayBuffer(256);
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const asBytes = new Uint8Array(arrayBuffer);
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for (let i = 0; i < SAMPLE_TEXT.length; i++) {
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asBytes[i] = SAMPLE_TEXT.charCodeAt(i);
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}
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if (this.state.type === 'ArrayBuffer') {
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xhr.send(arrayBuffer);
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return;
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}
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if (this.state.type === 'Uint8Array') {
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xhr.send(asBytes);
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return;
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}
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const TypedArrayClass = BINARY_TYPES[this.state.type];
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xhr.send(new TypedArrayClass(arrayBuffer));
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};
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render() {
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return (
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<View>
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<Text>Upload 255 bytes as...</Text>
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<Picker
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selectedValue={this.state.type}
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onValueChange={type => this.setState({type})}>
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{Object.keys(BINARY_TYPES).map(type => (
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<Picker.Item key={type} label={type} value={type} />
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))}
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</Picker>
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<View style={styles.uploadButton}>
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<TouchableHighlight onPress={this._upload}>
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<View style={styles.uploadButtonBox}>
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<Text style={styles.uploadButtonLabel}>Upload</Text>
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</View>
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</TouchableHighlight>
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</View>
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</View>
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);
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}
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}
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const styles = StyleSheet.create({
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uploadButton: {
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marginTop: 16,
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},
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uploadButtonBox: {
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flex: 1,
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paddingVertical: 12,
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alignItems: 'center',
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backgroundColor: 'blue',
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borderRadius: 4,
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},
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uploadButtonLabel: {
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color: 'white',
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fontSize: 16,
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fontWeight: '500',
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},
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});
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module.exports = XHRExampleBinaryUpload;
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