Golang os.Open是否可以将表单文件与动态文件一起使用

问题描述：

This is my first time using Os.Open and I was wondering can I use that for dynamic images (Images found in different directories) or do I have to put the full path every single time ? For instance in my FormFile

func ExampleFunc(w http.ResponseWriter, t *http.Request) {
     t.ParseForm()
     f, h, err := t.FormFile("file")
       if err != nil {
        print(err) }
       os.Open(h.Filename)
}

The function above gives me an error no such file or directory found however if I put the full path in there such as

os.Open("/Home/myfiles/Documents/pictures/horse_riding.png")

Then the image opens, is there a way of dynamically get the Image path and inserting that in os.Open ? I do have a FormFile that gets information about the incoming file but not the full path .

这是我第一次使用Os.Open，我想知道我是否可以将它用于动态图像（在不同的目录）还是我必须每次都输入完整路径？例如在我的FormFile中 p>

  func ExampleFunc（w http.ResponseWriter，t * http.Request）{
 t.ParseForm（）
f，h，err：= t  .FormFile（“ file”）
 if err！= nil {
 print（err）} 
 os.Open（h.Filename）
} 
  code>  pre> 
 
 上面的函数给我一个错误，找不到这样的文件或目录，但是如果我在其中放置完整路径，例如 p> 
 
   os.Open（“ / Home / myfiles /  Documents / pictures / horse_riding.png“）
  code>  pre> 
 
 然后打开图像，是否可以动态获取图像路径并将其插入os.Open中？ 我确实有一个FormFile，它可以获取有关传入文件的信息，但不能获取完整路径。 p> 
  div>

答

In a file server (such as this one), you are suppose to concatenate a root_folder to the file/path you get from your form.

filepath := path.Join((root_folder), h.Filename)

That way, you open files which are within a certain root folder, instead of any file on your system (which is not secure at all).

Golang os.Open是否可以将表单文件与动态文件一起使用

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