This article introduces the sample code of React Native using fetch to implement image upload, and shares it with everyone. The details are as follows: The ordinary network request parameter is a JSON object. The request parameter for image upload uses the formData object
The code package for using fetch to upload images is as follows:
let common_url = 'http://192.168.1.1:8080/'; //服务器地址 let token = ''; //用户登陆后返回的token /** * 使用fetch实现图片上传 * @param {string} url 接口地址 * @param {JSON} params body的请求参数 * @return 返回Promise */ function uploadImage(url,params){ return new Promise(function (resolve, reject) { let formData = new FormData(); for (var key in params){ formData.append(key, params[key]); } let file = {uri: params.path, type: 'application/octet-stream', name: 'image.jpg'}; formData.append("file", file); fetch(common_url + url, { method: 'POST', headers: { 'Content-Type': 'multipart/form-data;charset=utf-8', "x-access-token": token, }, body: formData, }).then((response) => response.json()) .then((responseData)=> { console.log('uploadImage', responseData); resolve(responseData); }) .catch((err)=> { console.log('err', err); reject(err); }); }); }
Usage method
let params = { userId:'abc12345', //用户id path:'file:///storage/emulated/0/Pictures/image.jpg' //本地文件地址 } uploadImage('app/uploadFile',params ) .then( res=>{ //请求成功 if(res.header.statusCode == 'success'){ //这里设定服务器返回的header中statusCode为success时数据返回成功 upLoadImgUrl = res.body.imgurl; //服务器返回的地址 }else{ //服务器返回异常,设定服务器返回的异常信息保存在 header.msgArray[0].desc console.log(res.header.msgArray[0].desc); } }).catch( err=>{ //请求失败 })
Note: Due to different background server configurations, the type in
let file = {uri: params.path, type: 'application/octet-stream', name: 'image.jpg'} may also be multipart/form -data
The file field in formData.append("file", file) may also be images
Related recommendations:
Use express and Sharing tips on fetching local json files
React Native uses Fetch to send POST requests
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