大家好，我使用带有React-Native-image-crop-Picker的Axios将图像上传到Node.js，但是我无法上传出现错误[Error: Network Error]的文件
我的Node.js代码一切正常，可以正常使用邮递员，但是我的react-native代码出问题了。请检查一下代码。
本机代码
async upload_File() {
if (this.validate_Fields()) {
const { image, images, video, files, description, user_id } = this.state;
if (this.state.type === 'image/jpeg') {
console.log('upload_ files ::: ', files);
console.log('upload_ files ::: ', files);
const formData = new FormData();
formData.append('description', description);
formData.append('user_id', user_id);
for (let i = 0; i < files.length; i++) {
formData.append("files[]", files[i]);
}
axios.post(API_URL + '/fileuploadapi/uploadPost', formData, {
headers: {
'Content-Type': 'multipart/form-data',
},
})
.then((response) => {
console.log(JSON.parse(JSON.stringify(response.status)));
this.cleanupImages();
Alert.alert('Upload Post Successfully ' + '');
})
.catch((error) => {
console.log(error);
Alert.alert('image Upload Post Failed , Try again !');
});
}
if (this.state.type === 'video/mp4') {
console.log('upload_ files ::: ', files);
axios.post(API_URL + '/fileuploadapi/uploadPost', {
description: description,
user_id: user_id,
files: image,
headers: {
'Content-Type': 'multipart/form-data',
},
})
.then((response) => {
console.log(JSON.parse(JSON.stringify(response.status)));
this.cleanupImages();
Alert.alert('Upload Post Successfully ' + '');
})
.catch((error) => {
console.log(error);
Alert.alert('Video Upload Post Failed , Try again !');
});
}
}
}
后端代码：
router.post('/uploadPost', upload.array("files[]", 12), function (req, res, next) {
if (!req) {
return res.status(500).json({ error: err });
} else {
console.log('Upload files:=> ', req.files)
console.log('body', req.body)
var user_id = req.body.user_id;
var description = req.body.description;
var sql = "INSERT INTO posts ( user_id, description ) VALUES ( ' " + user_id + " ', ' " + description + "' )";
connection.query(sql, (err, results, fields) => {
if (!err) {
for (var i = 0; i < req.files.length; i++) {
var post_id = results.insertId;
var file_name = req.files[i].originalname;
var type = req.files[i].mime;
var size = req.files[i].size;
var saved_name = req.files[i].filename;
var file_path = req.files[i].path;
var sql_files = "INSERT INTO files ( post_id, user_id, file_name, mimetype, size, saved_name, file_path ) VALUES ( '" + post_id + "' , '" + user_id + "', '" + file_name + "', '" + type + "', '" + size + "', '" + saved_name + "', '" + file_path + "' )";
connection.query(sql_files, (err, rows, fields) => {
if (!err) {
console.log({ 'originalname': file_name, 'uploadname': saved_name });
} else {
console.log(err);
}
});
}
return res.json({ "status": 200, "error": null, 'success': 'post Uploaded Successfully ', "response": "success" });
} else {
console.log(err);
return res.status(500).send({ 'error': 'post not uploaded' });
}
});
}
});
如果我的代码租约中有任何错误，请通知我。
答案 0 :(得分：0)
我得到了我的问题的答案
反应本机代码：
upload_File() {
if (this.validate_Fields()) {
const { image, images, files, description, user_id } = this.state;
// this.setState({ error: '', loading: true });
if (this.state.type === 'image/jpeg') {
console.log('upload_ files :::=> ', files);
const formData = new FormData();
formData.append('user_id', user_id);
formData.append('description', description);
// formData.append('files[]', files);
for (let i = 0; i < files.length; i++) {
formData.append('files[]', {
name: files[i].path.split('/').pop(),
type: files[i].mime,
uri: Platform.OS === 'android' ? files[i].path : files[i].path.replace('file://', ''),
});
}
axios.post(API_URL + '/fileuploadapi/uploadPost', formData, {
headers: { "Content-type": "multipart/form-data" }
}).then((response) => {
console.log(JSON.parse(JSON.stringify(response.status)));
this.cleanupImages();
Alert.alert('Upload Post Successfully ' + '');
}).catch((error) => {
console.log(error);
Alert.alert('image Upload Post Failed , Try again !');
});
}
if (this.state.type === 'video/mp4') {
console.log('upload_ files :::=> ', this.state.files);
const formData = new FormData();
formData.append('user_id', user_id);
formData.append('description', description);
formData.append('files[]', {
name: this.state.fileName,
type: this.state.type,
uri: Platform.OS === 'android' ? files.path : files.path.replace('file://', ''),
});
axios.post(API_URL + '/fileuploadapi/uploadPost', formData, {
headers: { "Content-type": "multipart/form-data" }
}).then((response) => {
console.log(JSON.parse(JSON.stringify(response.status)));
this.cleanupImages();
Alert.alert('video Upload Post Successfully ' + '');
}).catch((error) => {
console.log(error);
Alert.alert('video Upload Post Failed , Try again !');
});
}
if (this.state.type === "image/cam") {
console.log('upload_ files :::=> ', this.state.files);
const formData = new FormData();
formData.append('user_id', user_id);
formData.append('description', description);
formData.append('files[]', {
name: this.state.fileName,
type: this.state.type,
uri: Platform.OS === 'android' ? files.path : files.path.replace('file://', ''),
});
axios.post(API_URL + '/fileuploadapi/uploadPost', formData, {
headers: { "Content-type": "multipart/form-data" }
}).then((response) => {
console.log(JSON.parse(JSON.stringify(response.status)));
this.cleanupImages();
Alert.alert('camera Upload Post Successfully ' + '');
}).catch((error) => {
console.log(error);
Alert.alert('camera Upload Post Failed , Try again !');
});
}
}
}
renderVideo(image) {
console.log('rendering video');
return (<View style={{ height: 300, width: '100%' }}>
<Video
source={{ uri: this.state.files.path }}
style={{ width: '100%', height: 300 }}
resizeMode="cover"
paused={this.state.paused}
controls={true}
volume={this.state.volume}
muted={this.state.muted}
paused={this.state.paused}
onLoad={this.onLoad}
onBuffer={this.onBuffer}
onProgress={this.onProgress}
/>
</View>);
}
renderImage(image) {
return <Image style={{ width: '100%', height: 500, resizeMode: 'cover', marginBottom: 6, borderRadius: 2, borderColor: 'green', borderWidth: 1, }} source={image} />
}
renderAsset(image) {
if (image.mime && image.mime.toLowerCase().indexOf('video/') !== -1) {
return this.renderVideo(image);
}
return this.renderImage(image);
}
pickMultipleImages() {
ImagePicker.openPicker({
multiple: true,
mediaType: "photo",
// waitAnimationEnd: false,
// includeExif: true,
// forceJpg: true,
}).then(images => {
// console.log('received images', images);
console.log('received images mime:=>', images.mime);
this.setState({
type: "image/jpeg",
image: null,
files: images,
images: images.map(i => {
// console.log('received image', i);
console.log('received images mime::::', i.mime);
return { uri: i.path, width: i.width, height: i.height, mime: i.mime };
})
});
}).catch(error => {
console.log(error);
Alert.alert(error.message ? error.message : error);
});
}
pickSingleVideo() {
ImagePicker.openPicker({
mediaType: "video",
// compressVideoPreset: 'MediumQuality',
// includeExif: true,
}).then(image => {
console.log('received image', image);
console.log('received image mime', image.mime);
console.log('received file-memetype:', image.path.split('.').reverse()[0])
console.log('received fileName:', image.path.split('/').pop())
this.setState({
images: null,
files: image,
type: image.mime,
fileName: image.path.split('/').pop(),
image: { uri: image.path, width: image.width, height: image.height, mime: image.mime },
});
}).catch(error => {
console.log(error);
Alert.alert(error.message ? error.message : error);
});
}
pickSingleWithCamera() {
ImagePicker.openCamera({
// cropping: cropping,
// cropping: true,
// width: 600,
// height: 500,
// includeExif: true,
// mediaType: 'video',
}).then(image => {
console.log('received image', image);
console.log('received image mime: ', image.mime);
this.setState({
images: null,
files: image,
type: "image/cam",
// type: "video/mp4",
fileName: image.path.split('/').pop(),
image: { uri: image.path, width: image.width, height: image.height, mime: image.mime },
});
}).catch(error => {
console.log(error);
Alert.alert(error.message ? error.message : error);
});
}
// clear files data
cleanupImages() {
this.setState({
// description: '',
image: null,
images: null,
// video: '',
files: '',
})
ImagePicker.clean().then(() => {
console.log('removed tmp images from tmp directory');
}).catch(error => {
alert(error);
});
}
<View style={styles.mediaComponent}>
<ScrollView>
{this.state.image ? this.renderAsset(this.state.image) : null}
{this.state.images ? this.state.images.map(i => <View key={i.uri}>{this.renderAsset(i)}</View>) : null}
</ScrollView>
</View>
```````````````````