Downloading multiple files with beego
How to download multiple files from beego? The GetFile method only returns the first filename.
HTML:
<form action="/post/save" method="POST" enctype="multipart/form-data">
<input type="file" name="images" multiple>
</form>
in the controller:
file, header, err := this.GetFile("images")
if err != nil {
log.Println("error", err)
} else {
log.Println("filename", header.Filename)
}
Can you do it like this?
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It doesn't look like Beego has a convenient way to upload multiple files. GetFile () simply carries FromFile () from the standard library. You probably want to use the standard library reading function: r.MultipartReader ().
In situations like this, I usually expose the reader and write the response from the controller by calling:
w = this.Ctx.ResponseWriter
r = this.Ctx.ResponseReader
Now I can use the net / http package in a standard way and implement solutions external to the infrastructure.
A quick search for multiple file uploads in Go brings me to a blog post .
In the interest of protecting this response from a rotten connection, here is the author's solution:
func uploadHandler(w http.ResponseWriter, r *http.Request) {
switch r.Method {
//GET displays the upload form.
case "GET":
display(w, "upload", nil)
//POST takes the uploaded file(s) and saves it to disk.
case "POST":
//get the multipart reader for the request.
reader, err := r.MultipartReader()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
//copy each part to destination.
for {
part, err := reader.NextPart()
if err == io.EOF {
break
}
//if part.FileName() is empty, skip this iteration.
if part.FileName() == "" {
continue
}
dst, err := os.Create("/home/sanat/" + part.FileName())
defer dst.Close()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if _, err := io.Copy(dst, part); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
//display success message.
display(w, "upload", "Upload successful.")
default:
w.WriteHeader(http.StatusMethodNotAllowed)
}
}
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this.GetFiles
ctrl-f "GetFiles returns files with multiple downloads"
https://github.com/astaxie/beego/blob/master/controller.go
line 450
// GetFiles return multi-upload files
files, err:=c.Getfiles("myfiles")
if err != nil {
http.Error(w, err.Error(), http.StatusNoContent)
return
}
for i, _ := range files {`enter code here
for each fileheader, get a handle to the actual file
file, err := files[i].Open()
defer file.Close()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
//create destination file making sure the path is writeable.
dst, err := os.Create("upload/" + files[i].Filename)
defer dst.Close()
if err != nil {
enter code here
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
//copy the uploaded file to the destination file
if _, err := io.Copy(dst, file); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
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