我正在使用Expo的图像选择器,我得到了这个输出：
Object {
"cancelled": false,"height": 468,"uri": "file:///data/user/0/host.exp.exponent/cache/ExperienceData/%2540jbaek7023%252Fstylee/ImagePicker/9a12f0a3-9260-416c-98a6-51911c91ddf4.jpg","width": 468,}
我可以渲染我的图像,但我才意识到URL是手机的本地URI.
我正在使用Redux-Thunk和Axios发送HTTP POST请求：
export const sendPost = ( imageUri,title,content ) => async dispatch => {
let response = await axios.post(`${ROOT_URL}/rest-auth/registration/`,{
image,<<<<- I can't put image uri here :( it's LOCAL path
title,content
})
if(response.data) {
dispatch({ type: POST_CREATE_SUCCESS,payload: response.data.token })
} else {
dispatch({ type: POST_CREATE_FAIL })
}
}
更新我更改了请求调用
let headers = { 'Authorization': `JWT ${token}`};
if(hType==1) {
headers = { 'Authorization': `JWT ${token}`};
} else if (hType==2) {
headers = { 'Authorization': `Bearer ${token}`};
}
let imageData = new FormData();
imageData.append('file',{ uri: image });
let response = await axios.post(`${ROOT_URL}/clothes/create/`,{
image: imageData,text,bigType,onlyMe ...
},{headers});
！抱歉复杂但图像变量名称;图像是图像的uri.我不想更改原始变量名的名称
在服务器上,它正在打印
'image': {'_parts': [['file',{'uri': 'file:///data/user/0/host.exp.exponent
/cache/ExperienceData/%2540jbaek7023%252Fstylee/
ImagePicker/78f7526a-1dfa-4fc9-b4d7-2362964ab10d.jpg'}]]}
我发现gzip压缩是一种发送图像数据的方法.有帮助吗？
解决方法
另一种选择是将图像转换为base64并发送字符串.缩小通常是base64字符串的大小通常比图像本身大.
像这样的东西：
function readImage(url,callback) {
var request = new
XMLHttpRequest(); request.onload = function() {
var file = new FileReader();
file.onloadend = function() {
callback(file.result);
}
file.readAsDataURL(request.response); };
request.open('GET',url);
request.responseType = 'blob';
request.send();
}