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In what order the information will be sent?

From: Igor Korot <ikorot01_at_gmail.com>
Date: Wed, 25 Jul 2012 21:59:11 -0700

Hi, ALL,
I'm trying to port some VB code to libCURL.
The order in which VB program sends data is:

1. Set content-type to be "multipart/form-data;
boundary=---------------------------" + timestamp
2. Write "\n\r-----------------------------" + timestamp + "\n\r"
3. Write "Content-Disposition: form-data; name="MyFile";
filename="12345.bmp"\r\nContent-Type: image/bitmap\r\n\r\n"
4. POST'ing the content of the "12345.bmp"

Here is the ASP/HTML for this code:

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>

    <div>
    <form id="Form2" Method="Post" EncType="Multipart/Form-Data" RunAt="Server">

   <%-- The File upload Html control --%>
   Choose Your File To Upload <BR>
   <Input Name="MyFile" id="MyFile" Type="File" RunAt="Server">
   <BR>

   <%-- A button - when clicked the form is submitted and the
            Upload_Click event handler is fired... --%>
   <Input id="Submit1" Type="Submit" Value="Upload"
             RunAt="Server">

    </form> </div>
</body>
</html>

And that's how I translated the code for libCURL:

        wxString header = wxString::Format( "Content-Disposition: form-data;
name=\"MyFile\"; filename=\"%s\"", fileName );
        post = curl_slist_append( post, "Content-Type: multipart/form-data;
boundary=---------------------------12345" );
        post = curl_slist_append( post, header.c_str() );
        if( !post )
        {
                return;
        }
        post = curl_slist_append( post, "Content-Type: image/bitmap" );
        if( !post )
        {
                curl_slist_free_all( post );
                return;
        }
        result = curl_formadd( &first, &last, CURLFORM_COPYNAME, "name",
CURLFORM_FILE, (const char *) fileName.c_str(), CURLFORM_END );
        result = curl_formadd( &first, &last, CURLFORM_COPYNAME, "filename",
CURLFORM_COPYCONTENTS, (const char *) fileName.c_str(),
CURLFORM_CONTENTHEADER, post, CURLFORM_END );
        result = curl_formadd(&first, &last, CURLFORM_COPYNAME, "submit",
CURLFORM_COPYCONTENTS, "send", CURLFORM_END );
        if( result )
        {
                curl_slist_free_all( post );
                curl_formfree( first );
                return;
        }
        CURL *handle = wxGetApp().GetCurlHandle();
        FILE *fp = fopen( "session.log", "w+" );
        if( !fp )
        {
                curl_slist_free_all( post );
                curl_formfree( first );
                return;
        }
        curl_easy_setopt( handle, CURLOPT_VERBOSE, 1L );
        curl_easy_setopt( handle, CURLOPT_HEADER, 1L );
        curl_easy_setopt( handle, CURLOPT_STDERR, fp );
        curl_easy_setopt( handle, CURLOPT_ERRORBUFFER, errorMsg );
        curl_easy_setopt( handle, CURLOPT_URL, "http://xxx.xxx.xxx.xxx/Default.aspx" );
        curl_easy_setopt( handle, CURLOPT_HTTPPOST, first );
        error = curl_easy_perform( handle );
        if( !error )
        {
                curl_slist_free_all( post );
                curl_formfree( first );
                return;
        }
        curl_slist_free_all( post );
        curl_formfree( first );
       curl_easy_setopt( handle, CURLOPT_HTTPPOST, NULL );
        curl_easy_setopt( handle, CURLOPT_HTTPHEADER, NULL );

Is this correct translation?

Thank you.
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Received on 2012-07-26