我遇到了这个错误:
从源 'http://localhost:8081' 访问 XMLHttpRequest at 'http://localhost:3000/api/users/uploadAvatar' 已被 CORS 策略阻止:No 'Access-Control-Allow-Origin'请求的资源上存在标头。
当我的服务器 cors 选项是:
app.use((req, res, next) => {
res.header("Access-Control-Allow-Origin", "http://localhost:8081");
res.header("Access-Control-Allow-Credentials", "true");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization");
if (req.method === 'OPTIONS') {
res.header("Access-Control-Allow-Methods", "PUT, POST, DELETE, GET");
return res.status(200).json({});
}
next();
});
从前端我用这个选项调用服务器:
var data = {
image: imageCrop.current.getImage().toDataURL(),
target: targetImage,
}
var config = {
onUploadProgress: function (progressEvent) {
var percentCompleted = Math.round((progressEvent.loaded * 100) / progressEvent.total)
setUploadPercent(percentCompleted)
},
headers: authHeader(),
withCredentials: true,
}
axios.post('uploadAvatar', data ,config).then((res) => {
setUploadPercent(0);
if (res.status === 200) {
cogoToast.success("upload is completed")
setUploadModal(false);
upDateuserInfo();
}
}).catch((err) => {
setUploadPercent(0);
setUploadModal(false);
});
Auth 标头服务提供:
export default function authHeader() {
const user = JSON.parse(localStorage.getItem("user"));
if (user && user.accessToken) {
// For Spring Boot back-end
// return { Authorization: "Bearer " + user.accessToken };
// for Node.js Express back-end
return { Authorization: "Bearer " + user.accessToken};
} else {
return {};
}
}
我做错了什么??请帮我!!!附言如果我删除图像参数并且无法设置“Access-Control-Allow-Origin”,“*”,则调用正在工作,因为它会给我一个使用通配符的错误。
答案 0 :(得分:-1)
我已解决将此行放在 package.json 中:
"proxy": "http://localhost:3000/api/"