無法使用文件上傳將圖像上傳到 node.js 中的特定文件夾

Question

下面是用於文件上傳的 html

<div class="form-group" >
  <label for="Image">Image</label>
  <input type="file" name="image"  value="<%=fillData.image%>"  id="inpFile" class="form-control"placeholder="drop an image " /><br>
  <div class="image-preview" style="text-align: center;">
    <img src="" id="imgPreview" alt="imagePreview"/>
  </div>
</div>

使用fileupload模塊在 NodeJS 中處理圖像上傳的服務器端代碼

router.post("/addProduct",(req,res)=>{
  const nimage = req.files.image.name
  const Price = parseFloat(req.body.price).toFixed(2)
  console.log(req.files.image)
  const nProduct = new Products({
    title:req.body.title,
    slug:req.body.slug,
    desc :req.body.description,
    category:req.body.category,
    price:Price,
    image:nimage
  })
  nProduct.save().then((value) => {
    mkdirp("public/product_images/"+nProduct._id).then(made=>{
      console.log(`file created starting with on id ${made}`)
    })
    mkdirp("public/product_images/"+nProduct._id+"/gallery").then(made=>{
      console.log(`file created starting with id and gallery  ${made}`)
    })
    mkdirp("public/product_images/"+nProduct._id+"/gallery/thumbs").then(made=>{
      console.log(`file created starting with  and thumbs${made}`)
    })
    if(nimage!=""){
      console.log("hello")
      const productImage = req.files.image
      const path = "public/product_images/"+nProduct._id+"/"+nimage;
      console.log(path)
      productImage.mv(path, function(err){
        return console.log(err)
      })
    }
  })
}

收到以下錯誤

[錯誤：ENOENT：沒有這樣的文件或目錄，打開 'D:\NodeE\public\product_images\5ff718bebe310d2f3c34590a\noimage.jpg'] { errno：-4058，代碼：'ENOENT'，系統調用：'open'，路徑：' D:\NodeE\public\product_images\5ff718bebe310d2f3c34590a\noimage.jpg' }

Answer 1

您正在同步使用 mkdirp，而它是異步操作。

將所有代碼移入then(made=>{... })或使用異步等待。

router.post("/addProduct",async (req,res)=>{
  const nimage = req.files.image.name
  const Price = parseFloat(req.body.price).toFixed(2)
  console.log(req.files.image)
  const nProduct = new Products({
    title:req.body.title,
    slug:req.body.slug,
    desc :req.body.description,
    category:req.body.category,
    price:Price,
    image:nimage
  })
  
  await nProduct.save();

  await mkdirp("public/product_images/"+nProduct._id);
  await mkdirp("public/product_images/"+nProduct._id+"/gallery");
  await mkdirp("public/product_images/"+nProduct._id+"/gallery/thumbs");

  if(nimage!=""){
    console.log("hello")
    const productImage = req.files.image
    const path = "public/product_images/"+nProduct._id+"/"+nimage;
    console.log(path)
    productImage.mv(path, function(err){
      return console.log(err)
    })
  }
}

Answer 2

您需要鏈接then ，以便僅在創建目錄后才寫入目錄

例如。

mkdirp(...)
  .then(made=>{
    // write to directory here
  })

或者，如果您想在創建所有目錄后編寫使用

Promise.all(mdirp('...'), mdirp('...'), mdirp('...'))
  .then(made=>{
    // write to directory here
  })