Angular 加载资源失败:服务器响应状态为500(内部服务器错误)。当我尝试上载图像时,会发生此错误
我是新来指发展的。我有两个输入字段和一个带有照片上传按钮的字段。虽然我设法在屏幕上显示上传的照片,但在服务器上上传时遇到了问题。有人能帮忙吗 我也得到了这个错误:Angular 加载资源失败:服务器响应状态为500(内部服务器错误)。当我尝试上载图像时,会发生此错误,angular,frontend,backend,mean,image-upload,Angular,Frontend,Backend,Mean,Image Upload,我是新来指发展的。我有两个输入字段和一个带有照片上传按钮的字段。虽然我设法在屏幕上显示上传的照片,但在服务器上上传时遇到了问题。有人能帮忙吗 我也得到了这个错误: Error: ENOENT: no such file or directory, open 'C:\Something\Something\Something\Practice\finalappbackend\backedn\images\title-i-entered-1623300156286.jpeg' 以下是我在后端的代码
Error: ENOENT: no such file or directory, open 'C:\Something\Something\Something\Practice\finalappbackend\backedn\images\title-i-entered-1623300156286.jpeg'
以下是我在后端的代码:
app.js
const multer = require("multer");
const MIME_TYPE_MAP = {
"image/png": "png",
"image/jpeg": "jpeg",
"image/jpg": "jpg",
};
const storage = multer.diskStorage({
destination: (req, file, cb) => {
const isValid = MIME_TYPE_MAP[file.mimetype];
let error = new Error("Invalid mime type");
if (isValid) {
error = null;
}
cb(error, "backedn/images");
},
filename: (req, file, cb) => {
const name = file.originalname.toLowerCase().split(" ").join("-");
const ext = MIME_TYPE_MAP[file.mimetype];
cb(null, name + "-" + Date.now() + "." + ext);
},
});
app.post(
"/api/posts",
multer({ storage: storage }).single("image"),
(req, res, next) => {
const post = new Post({
title: req.body.title,
content: req.body.content,
});
console.log(post);
post.save().then((result) => {
res.status(201).json({
message: "Post added successfully",
postId: result._id,
});
});
}
);
这是我在前端的代码:
posts.service.ts
addPost(id: string, title: string, content: string, image: File) {
const postData = new FormData();
postData.append("title", title);
postData.append("content", content);
postData.append("image", image, title);
this.http
.post<{ message: string; postId: string }>(
'http://localhost:3000/api/posts',
postData
)
.subscribe((responseData) => {
const post: Post = {id: responseData.postId, title: title, content: content}
this.posts.push(post);
this.postsUpdated.next([...this.posts]);
});
}
和post-create.component.html
<div>
<button mat-stroked-button type="button" (click)="filePicker.click()">
Pick Image
</button>
<input type="file" #filePicker (change)="onImagePicked($event)" />
</div>
拾取图像
解释
enoint表示:错误无条目。如果您查看错误:
Error: ENOENT: no such file or directory, open 'C:\Something\Something\Something\Practice\finalappbackend\backedn\images\title-i-entered-1623300156286.jpeg'
这意味着:我无法打开“…finalappbackend\backedn\images”
将图像保存到,因为此目录不存在
在
注意:提供时,您负责创建目录
目的地作为一个函数。当传递字符串时,multer将
确保已为您创建目录
行动
确保已创建目录。可能是名字中的输入错误。谢谢,你说得对。。有时是一些小事:/
Error: ENOENT: no such file or directory, open 'C:\Something\Something\Something\Practice\finalappbackend\backedn\images\title-i-entered-1623300156286.jpeg'