is there a example for upload file with net/http

[平民四月份]

i want to post a form like this, how can i do it with go1 net/http, anybody who can give me a example ? thx

<form action="sql.aspx" method="post" enctype="multipart/form-data">  

        <input id="Text1" name="content" type="text" /><br />  

        <input id="Text2" name="uploadImg" type="text" /><br />  

        <input id="File1" type="file" name="image0" /><br />  

        <input id="Submit1" type="submit" value="submit" />  

</form>   

--
 Face the sea, for the spring flowers blossoming

[zhai]

2012/4/10 平民四月份 <lew...@gmail.com>

i want to post a form like this, how can i do it with go1 net/http, anybody who can give me a example ? thx

<form action="sql.aspx" method="post" enctype="multipart/form-data">  

        <input id="Text1" name="content" type="text" /><br />  

        <input id="Text2" name="uploadImg" type="text" /><br />  

        <input id="File1" type="file" name="image0" /><br />  

        <input id="Submit1" type="submit" value="submit" />  

</form>   

http://golang.org/pkg/net/http/#Request.FormFile

func save(w http.ResponseWriter, r *http.Request) {

fn,header,err:= r.FormFile("image0")

        check(err)

defer fn.Close()

f, _ := os.Create("./upload/"+header.Filename)

defer f.Close()

       io.Copy(f,fn)

[Kyle Lemons]

2012/4/9 平民四月份 <lew...@gmail.com>

i want to post a form like this, how can i do it with go1 net/http, anybody who can give me a example ? thx

<form action="sql.aspx" method="post" enctype="multipart/form-data">  

        <input id="Text1" name="content" type="text" /><br />  

        <input id="Text2" name="uploadImg" type="text" /><br />  

        <input id="File1" type="file" name="image0" /><br />  

        <input id="Submit1" type="submit" value="submit" />  

</form>   

Do you want to upload to that form or receive an upload in a go application? 

[平民四月份]

i want to send a request but i do not know how to build a multipart
(multipart.CreateFormFile seems not fill the file's binary data to a
part )and link it to a request object

[Kyle Lemons]

You have to create a file, write to it, and then close the writer, but before any of that you have to set the content type and boundary in the HTTP headers.

See http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4 for more information.

2012/4/10 平民四月份 <lew...@gmail.com>

[平民四月份]

maybe some code will clear my intent:

buf := new(bytes.Buffer )

w := multipart.NewWriter(buf)

w.WriteField("content", "abcd" )

w.WriteField("content2", "1234" )

w.CreateFormFile("image0", "C:/example.jpg" )

w.Close()

after this. i print the buf:

fmt.Println( string(buf.Bytes()) )

--boudnary

Content-Disposition: form-data; name="content"

abcd

--boudnary

Content-Disposition: form-data; name="content2"

1234

--boundary

Content-Disposition: form-data; name="image0"; filename= "c:/example.jpg"

"Content-Type: image/jpeg"

//placeholder(add by me)

--boundary--

i want to see the placeholder is the binary data for "C:/example.jpg", but it is nothing, SO how to add the binary data to the multipart.

2012/4/11 Kyle Lemons <kev...@google.com>

[Sanjay Menakuru]

When you call CreateFormFile, it returns an io.Writer. You have to write your data to that writer, use io.Copy from your in-memory bytes.Buffer, or io.Copy from your on-disk os.File.

Sanjay

[Kyle Lemons]

On Tue, Apr 10, 2012 at 6:36 PM, Sanjay Menakuru <balas...@gmail.com> wrote:

When you call CreateFormFile, it returns an io.Writer. You have to write your data to that writer, use io.Copy from your in-memory bytes.Buffer, or io.Copy from your on-disk os.File.

You will still have to set the content-type and boundary in the HTTP headers before POSTing it will work.