[英]POST Requests on WP7
我已經死了大約6個小時試圖弄清楚如何在WP7中發出常規的POST請求,我嘗試了在這里和其他許多地方發布的類似問題的答案,我也嘗試過很多不同的API POST請求,他們都領先對某個問題,
遠程服務器返回錯誤:NotFound。
似乎每次都缺少一些東西。
所以,如果你有人請告訴我們如何正確地在這個WP7中獲得POST請求
我用它來發布到Facebook沒有任何問題:
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(requestUrl);
request.Method = "POST";
request.BeginGetResponse((e) =>
{
try
{
WebResponse response = request.EndGetResponse(e);
// Do Stuff
}
catch (WebException ex)
{
// Handle
}
catch (Exception ex)
{
// Handle
}
}, null);
我假設你已經嘗試了這個,所以它可能與發布數據有關(在上面的例子中不是因為facebook使用了查詢字符串)。 你能再告訴我們了嗎?
編輯:這是一個用於編寫帖子數據的(未經測試的)示例:
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(requestUrl);
request.Method = "POST";
request.BeginGetRequestStream((e) =>
{
using (Stream stream = request.EndGetRequestStream(e))
{
// Write data to the request stream
}
request.BeginGetResponse((callback) =>
{
try
{
WebResponse response = request.EndGetResponse(callback);
// Do Stuff
}
catch (WebException ex)
{
// Handle
}
catch (Exception ex)
{
// Handle
}
}, null);
}, null);
我使用以下類來使用WP7發出POST請求:
public class PostMultiPartFormData
{
private Dictionary<string, object> Parameters;
private Encoding ENCODING = Encoding.UTF8;
private string BOUNDARY = "-----------------------------wp7postrequest";
public event EventHandler PostComplete;
public void Post(string postbackURL,
Dictionary<string, object> parameters)
{
Parameters = parameters;
Uri url = null;
url = new Uri(postbackURL);
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "POST";
request.ContentType = "multipart/form-data; boundary=" + BOUNDARY;
request.BeginGetRequestStream(new AsyncCallback(SendStatusUpdate), request);
}
private void SendStatusUpdate(IAsyncResult ar)
{
HttpWebRequest request = (HttpWebRequest)ar.AsyncState;
Stream stream = request.EndGetRequestStream(ar);
byte[] byteArray = GetMultipartFormData(Parameters, BOUNDARY);
stream.Write(byteArray, 0, byteArray.Length);
stream.Close();
stream.Dispose();
request.BeginGetResponse(new AsyncCallback(StatusUpdateCompleted), request);
}
private byte[] GetMultipartFormData(Dictionary<string, object> postParameters, string boundary)
{
Stream formDataStream = new System.IO.MemoryStream();
foreach (var param in postParameters)
{
if (param.Value is byte[])
{
byte[] fileData = param.Value as byte[];
string header = string.Format("--{0}\r\nContent-Disposition: form-data; name=\"{1}\"; filename=\"{2}.jpg\";\r\nContent-Type: application/octet-stream\r\n\r\n", boundary, param.Key, param.Key);
formDataStream.Write(ENCODING.GetBytes(header), 0, header.Length);
formDataStream.Write(fileData, 0, fileData.Length);
}
else
{
string postData = string.Format("--{0}\r\nContent-Disposition: form-data; name=\"{1}\"\r\n\r\n{2}\r\n", boundary, param.Key, param.Value);
byte[] b = ENCODING.GetBytes(postData);
foreach (var item in b)
{
formDataStream.WriteByte(item);
}
}
}
string footer = "\r\n--" + boundary + "--\r\n";
byte[] footerbytes = ENCODING.GetBytes(footer);
formDataStream.Write(footerbytes, 0, footerbytes.Length);
formDataStream.Position = 0;
byte[] formData = new byte[formDataStream.Length];
formDataStream.Read(formData, 0, formData.Length);
formDataStream.Flush();
formDataStream.Close();
return formData;
}
private void StatusUpdateCompleted(IAsyncResult ar)
{
if (PostComplete != null)
{
PostComplete(ar, null);
}
}
}
例:
PostMultiPartFormData postRequest = new PostMultiPartFormData();
postRequest.PostComplete += new EventHandler( (sender, e) =>
{
IAsyncResult ar = ((IAsyncResult)sender);
using (WebResponse resp = ((HttpWebRequest)ar.AsyncState).EndGetResponse(ar))
{
using (StreamReader sr = new StreamReader(resp.GetResponseStream()))
{
string responseString = sr.ReadToEnd();
this.Dispatcher.BeginInvoke(() =>
{
textBlock.Text = responseString;
});
}
}
});
postRequest.Post("http://localhost:50624/SSLProxy.ashx",
new Dictionary<string, object>() { { "param1", "value1" } });
這應該工作......如果它不讓我知道! :-)
為了更方便地訪問高級http功能,請查看以下http類:
http://mytoolkit.codeplex.com/wikipage?title=Http
它封裝了GET,POST,FILES(使用路徑或Stream
對象)和GZIP(WP7不直接支持)請求。
我建議你使用postclient 。 這很簡單。 您只需要將dll文件的引用添加到項目中,然后編寫如下內容:
public void authorize(string login, string password)
{
Dictionary<string, object> parameters = new Dictionary<string, object>();
parameters.Add("command", "login");
parameters.Add("username", login);
parameters.Add("password", password);
PostClient proxy = new PostClient(parameters);
proxy.DownloadStringCompleted += (sender, e) =>
{
if (e.Error == null)
{
MessageBox.Show(e.Result);
}
};
proxy.DownloadStringAsync(new Uri("http://address.com/service", UriKind.Absolute));
}
要添加帖子數據,只需調用BeginGetRequestStream方法(另外,BeginGetResponse移動到GetRequestStreamCallback)
request.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), request);
void GetRequestStreamCallback(IAsyncResult asynchronousResult)
{
HttpWebRequest webRequest = (HttpWebRequest)asynchronousResult.AsyncState;
// End the stream request operation
Stream postStream = webRequest.EndGetRequestStream(asynchronousResult);
// Create the post data
string postData = "post data";
byte[] byteArray = Encoding.Unicode.GetBytes(postData);
// Add the post data to the web request
postStream.Write(byteArray, 0, byteArray.Length);
postStream.Close();
// Start the web request
webRequest.BeginGetResponse(new AsyncCallback(GetResponseCallback), webRequest);
}
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