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https://github.com/zhigang1992/react-native.git
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[ReactNative][oss] Open source NetworkingModule
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Martin Konicek
376
Examples/UIExplorer/XHRExample.ios.js
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376
Examples/UIExplorer/XHRExample.ios.js
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/**
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* The examples provided by Facebook are for non-commercial testing and
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* evaluation purposes only.
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*
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* Facebook reserves all rights not expressly granted.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL
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* FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* @flow
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*/
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'use strict';
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var React = require('react-native');
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var {
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AlertIOS,
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CameraRoll,
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Image,
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LinkingIOS,
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PixelRatio,
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ProgressViewIOS,
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StyleSheet,
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Text,
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TextInput,
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TouchableHighlight,
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View,
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} = React;
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class Downloader extends React.Component {
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xhr: XMLHttpRequest;
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cancelled: boolean;
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constructor(props) {
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super(props);
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this.cancelled = false;
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this.state = {
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downloading: false,
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contentSize: 1,
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downloaded: 0,
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};
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}
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download() {
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this.xhr && this.xhr.abort();
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var xhr = this.xhr || new XMLHttpRequest();
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xhr.onreadystatechange = () => {
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if (xhr.readyState === xhr.HEADERS_RECEIVED) {
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var contentSize = parseInt(xhr.getResponseHeader('Content-Length'), 10);
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this.setState({
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contentSize: contentSize,
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downloaded: 0,
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});
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} else if (xhr.readyState === xhr.LOADING) {
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this.setState({
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downloaded: xhr.responseText.length,
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});
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} else if (xhr.readyState === xhr.DONE) {
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this.setState({
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downloading: false,
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});
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if (this.cancelled) {
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this.cancelled = false;
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return;
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}
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if (xhr.status === 200) {
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alert('Download complete!');
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} else if (xhr.status !== 0) {
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alert('Error: Server returned HTTP status of ' + xhr.status + ' ' + xhr.responseText);
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} else {
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alert('Error: ' + xhr.responseText);
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}
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}
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};
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xhr.open('GET', 'http://www.gutenberg.org/cache/epub/100/pg100.txt');
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xhr.send();
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this.xhr = xhr;
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this.setState({downloading: true});
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}
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componentWillUnmount() {
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this.cancelled = true;
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this.xhr && this.xhr.abort();
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}
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render() {
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var button = this.state.downloading ? (
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<View style={styles.wrapper}>
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<View style={styles.button}>
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<Text>Downloading...</Text>
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</View>
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</View>
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) : (
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<TouchableHighlight
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style={styles.wrapper}
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onPress={this.download.bind(this)}>
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<View style={styles.button}>
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<Text>Download 5MB Text File</Text>
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</View>
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</TouchableHighlight>
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);
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return (
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<View>
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{button}
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<ProgressViewIOS progress={(this.state.downloaded / this.state.contentSize)}/>
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</View>
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);
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}
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}
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var PAGE_SIZE = 20;
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class FormUploader extends React.Component {
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_isMounted: boolean;
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_fetchRandomPhoto: () => void;
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_addTextParam: () => void;
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_upload: () => void;
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constructor(props) {
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super(props);
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this.state = {
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isUploading: false,
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uploadProgress: null,
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randomPhoto: null,
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textParams: [],
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};
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this._isMounted = true;
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this._fetchRandomPhoto = this._fetchRandomPhoto.bind(this);
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this._addTextParam = this._addTextParam.bind(this);
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this._upload = this._upload.bind(this);
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this._fetchRandomPhoto();
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}
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_fetchRandomPhoto() {
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CameraRoll.getPhotos(
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{first: PAGE_SIZE},
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(data) => {
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if (!this._isMounted) {
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return;
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}
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var edges = data.edges;
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var edge = edges[Math.floor(Math.random() * edges.length)];
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var randomPhoto = edge && edge.node && edge.node.image;
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if (randomPhoto) {
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this.setState({randomPhoto});
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}
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},
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(error) => undefined
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);
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}
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_addTextParam() {
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var textParams = this.state.textParams;
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textParams.push({name: '', value: ''});
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this.setState({textParams});
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}
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componentWillUnmount() {
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this._isMounted = false;
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}
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_onTextParamNameChange(index, text) {
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var textParams = this.state.textParams;
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textParams[index].name = text;
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this.setState({textParams});
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}
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_onTextParamValueChange(index, text) {
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var textParams = this.state.textParams;
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textParams[index].value = text;
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this.setState({textParams});
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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 = () => {
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this.setState({isUploading: false});
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if (xhr.status !== 200) {
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AlertIOS.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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AlertIOS.alert(
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'Upload failed',
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'No response payload.'
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);
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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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AlertIOS.alert(
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'Upload failed',
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'Invalid response payload.'
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);
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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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LinkingIOS.openURL(url);
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};
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var formdata = new FormData();
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if (this.state.randomPhoto) {
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formdata.append('image', {...this.state.randomPhoto, name: 'image.jpg'});
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}
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this.state.textParams.forEach(
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(param) => formdata.append(param.name, param.value)
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);
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if (xhr.upload) {
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xhr.upload.onprogress = (event) => {
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console.log('upload onprogress', event);
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if (event.lengthComputable) {
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this.setState({uploadProgress: event.loaded / event.total});
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}
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};
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}
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xhr.send(formdata);
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this.setState({isUploading: true});
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}
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render() {
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var image = null;
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if (this.state.randomPhoto) {
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image = (
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<Image
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source={this.state.randomPhoto}
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style={styles.randomPhoto}
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/>
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);
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}
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var textItems = this.state.textParams.map((item, index) => (
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<View style={styles.paramRow}>
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<TextInput
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autoCapitalize="none"
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autoCorrect={false}
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onChangeText={this._onTextParamNameChange.bind(this, index)}
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placeholder="name..."
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style={styles.textInput}
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/>
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<Text style={styles.equalSign}>=</Text>
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<TextInput
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autoCapitalize="none"
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autoCorrect={false}
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onChangeText={this._onTextParamValueChange.bind(this, index)}
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placeholder="value..."
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style={styles.textInput}
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/>
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</View>
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));
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var uploadButtonLabel = this.state.isUploading ? 'Uploading...' : 'Upload';
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var uploadProgress = this.state.uploadProgress;
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if (uploadProgress !== null) {
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uploadButtonLabel += ' ' + Math.round(uploadProgress * 100) + '%';
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}
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var uploadButton = (
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<View style={styles.uploadButtonBox}>
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<Text style={styles.uploadButtonLabel}>{uploadButtonLabel}</Text>
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</View>
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);
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if (!this.state.isUploading) {
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uploadButton = (
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<TouchableHighlight onPress={this._upload}>
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{uploadButton}
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</TouchableHighlight>
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);
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}
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return (
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<View>
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<View style={[styles.paramRow, styles.photoRow]}>
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<Text style={styles.photoLabel}>
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Random photo from your library
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(<Text style={styles.textButton} onPress={this._fetchRandomPhoto}>
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update
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</Text>)
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</Text>
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{image}
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</View>
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{textItems}
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<View>
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<Text
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style={[styles.textButton, styles.addTextParamButton]}
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onPress={this._addTextParam}>
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Add a text param
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</Text>
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</View>
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<View style={styles.uploadButton}>
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{uploadButton}
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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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exports.framework = 'React';
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exports.title = 'XMLHttpRequest';
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exports.description = 'XMLHttpRequest';
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exports.examples = [{
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title: 'File Download',
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render() {
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return <Downloader/>;
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}
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}, {
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title: 'multipart/form-data Upload',
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render() {
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return <FormUploader/>;
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}
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}];
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var styles = StyleSheet.create({
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wrapper: {
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borderRadius: 5,
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marginBottom: 5,
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},
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button: {
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backgroundColor: '#eeeeee',
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padding: 8,
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},
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paramRow: {
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flexDirection: 'row',
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paddingVertical: 8,
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alignItems: 'center',
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borderBottomWidth: 1 / PixelRatio.get(),
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borderBottomColor: 'grey',
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},
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photoLabel: {
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flex: 1,
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},
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randomPhoto: {
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width: 50,
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height: 50,
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},
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textButton: {
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color: 'blue',
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},
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addTextParamButton: {
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marginTop: 8,
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},
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textInput: {
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flex: 1,
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borderRadius: 3,
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borderColor: 'grey',
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borderWidth: 1,
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height: 30,
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paddingLeft: 8,
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},
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equalSign: {
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paddingHorizontal: 4,
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},
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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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