Handling multipart file uploads with goweb

uploader.go

package main

import (
	"code.google.com/p/goweb/goweb"
	"io/ioutil"
)

// dummy error struct for pretty json export
type ControllerError struct {
	Error error
}

type UploadController struct{}

/* 
  Multi-part form named "file".  This retrieves a binary file from
  the request body and saves it to incoming/filename.  You will 
  need to create the incoming directory in the same path as the 
  uploader.

  Because cx.Request is simply a net/http struct, we can work with
  it accordingly.  In this example, the "description" value is 
  taken and returned to the requestor.

  Example -  Upload the goweb source archive with HTTPie:

    http -f POST localhost:8080/uploader description="goweb source archive" file@goweb-v1.3.zip

  This should store the file locally and return the following if 
  all goes well:

    {
        "C": "", 
        "D": "Uploaded: goweb-v1.3.zip - goweb source archive", 
        "E": null, 
        "S": 200
    }
*/
func (cr *UploadController) Create(cx *goweb.Context) {
	binpath := "incoming/"
	file, handler, err := cx.Request.FormFile("file")
	if err != nil {
		cx.RespondWithData(ControllerError{err})
	}
	data, err := ioutil.ReadAll(file)
	if err != nil {
		cx.RespondWithData(ControllerError{err})
	}
	err = ioutil.WriteFile(binpath+handler.Filename, data, 0777)
	if err != nil {
		cx.RespondWithData(ControllerError{err})
	}

	cx.RespondWithData("Uploaded: " + handler.Filename + " - " + cx.Request.FormValue("description"))
}

// make rocket go now
func main() {

	goweb.ConfigureDefaultFormatters() // default to JSON

	uploader := new(UploadController)
	goweb.MapRest("/uploader", uploader)
	goweb.ListenAndServe(":8080")
}