Menu
I'm trying to send a multipart form using Go packages mime/multipart and http, and I need some help to solve it.
The HTML would be:
<html>
<head><title>Multipart Test</title></head>
<body>
<form action="/multipart" enctype="multipart/form-data" method="POST">
<label for="file"> Please select a File </label>
<input id="file" type="file" name="file"/>
<br>
<label for="input1"> Please write some text </label>
<input id="input1" type="text" name="input1"/>
<br>
<label for="input2"> Please write some more text </label>
<input id="input2" type="text" name="input2"/>
<br>
<input type="submit" name="Submit" value="Submit"/>
</body>
And my Go approach is like this:
var buffer bytes.Buffer
w := multipart.NewWriter(&buffer)
// Write fields and files
w.CreateFormField("input1")
w.WriteField("input1","value1")
w.CreateFormFile("file","filename.dat")
// I need a Reader to here to read the file, but how ?
// then send the request
resp,err := http.Post(url,w.FormDataContentType(),&buffer)
258
The answer can be found following this sample code
// Upload file to google code
func Upload(tarball string) (err os.Error) {
// Create buffer
buf := new(bytes.Buffer) // caveat IMO dont use this for large files, \
// create a tmpfile and assemble your multipart from there (not tested)
w := multipart.NewWriter(buf)
// Create a form field writer for field label
label, err := w.CreateFormField("label")
if err != nil {
return err
}
// Write label field
label.Write([]byte("label here"))
// Create a form field writer for field summary
summary, err := w.CreateFormField("summary")
if err != nil {
return err
}
// Write summary field
summary.Write([]byte("summary here"))
// Create file field
fw, err := w.CreateFormFile("upload", tarball)
if err != nil {
return err
}
fd, err := os.Open(tarball)
if err != nil {
return err
}
defer fd.Close()
// Write file field from file to upload
_, err = io.Copy(fw, fd)
if err != nil {
return err
}
// Important if you do not close the multipart writer you will not have a
// terminating boundry
w.Close()
req, err := http.NewRequest("POST", repoUrl, buf)
if err != nil {
return err
}
req.Header.Set("Content-Type", w.FormDataContentType())
req.SetBasicAuth("[email protected]", "password")
res, err := client.Do(req)
if err != nil {
return err
}
io.Copy(os.Stderr, res.Body) // Replace this with Status.Code check
return err
}
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With