Verwenden von HttpWebRequest zum POST von Daten / Hochladen von Bildern mit Multipart / Formulardaten
Ich versuche, die ImageShack-API zum Hochladen von Bildern zu verwenden. Um es zu benutzen, soll ichPOST
das Bild mitmultipart/form-data
. Ich habe es gerne gemacht ...
var postData = "";
var req = HttpWebRequest.Create("http://www.imageshack.us/upload_api.php");
req.Method = "POST";
req.ContentType = "multipart/form-data";
postData += "key=my_key_here&";
postData += "type=base64&";
// get base64 data from image
byte[] bytes = File.ReadAllBytes(@"D:\tmp\WpfApplication1\WpfApplication1\Images\Icon128.gif");
string encoded = Convert.ToBase64String(bytes);
postData += "fileupload=" + encoded;
byte[] reqData = Encoding.UTF8.GetBytes(postData);
using (Stream dataStream = req.GetRequestStream())
{
dataStream.Write(reqData, 0, reqData.Length);
}
var res = (HttpWebResponse)req.GetResponse();
var resStream = res.GetResponseStream();
var reader = new StreamReader(resStream);
string resString = reader.ReadToEnd();
txt1.Text = resString;
aber ImageShack beschwert sich, dass
<links>
<error id="parameter_missing">Sorry, but we've detected that unexpected data is received. Required parameter 'fileupload' is missing or your post is not multipart/form-data</error>
</links>
FileUpload ist vorhanden und ich verwendemultipart/form-data
was ist los
AKTUALISIEREN
Neuer Codehttp: //pastebin.com/TN6e0CD
Post-Datenhttp: //pastebin.com/fYE9fsx
UPDATE 2
Ich schaute auf die andere FrageMultipart-Formulare von C # -Client. änderte meinen Code mit Grenze, entfernte den erwarteten 100-Header, den ich immer noch nicht zum Laufen bringen kann ...
ServicePointManager.Expect100Continue = false;
var boundary = "-----------------------------28520690214962";
var newLine = Environment.NewLine;
var propFormat = boundary + newLine +
"Content-Disposition: form-data; name=\"{0}\"" + newLine + newLine +
"{1}" + newLine + newLine;
var fileHeaderFormat = boundary + newLine +
"Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"" + newLine;
var req = (HttpWebRequest)HttpWebRequest.Create("http://jm/php/upload.php");
req.Method = WebRequestMethods.Http.Post;
req.ContentType = "multipart/form-data; boundary=" + boundary;
using (var reqStream = req.GetRequestStream()) {
var reqWriter = new StreamWriter(reqStream);
var tmp = string.Format(propFormat, "str1", "hello world");
reqWriter.Write(tmp);
tmp = string.Format(propFormat, "str2", "hello world 2");
reqWriter.Write(tmp);
reqWriter.Write(boundary + "--");
reqWriter.Flush();
}
var res = req.GetResponse();
using (var resStream = res.GetResponseStream()) {
var reader = new StreamReader(resStream);
txt1.Text = reader.ReadToEnd();
}