Pou's IT Life

using System;

using Windows.Foundation;

using Windows.Web.Http;

var uri = new Uri("http://example.com/datalist.aspx");

var httpClient = new HttpClient();

// Always catch network exceptions for async methods

try 

{

    var result = await httpClient.GetStringAsync(uri);

}

catch 

{

    // Details in ex.Message and ex.HResult.       

}

// Once your app is done using the HttpClient object call dispose to 

// free up system resources (the underlying socket and memory used for the object)

httpclient.Dispose();

private async void SendHttpRequestMessage()

{

    // 建立 HttpRequestMessage

    HttpRequestMessage requestMsg = new HttpRequestMessage(HttpMethod.Get, new Uri(""));

    // 修改 headers

    requestMsg.Headers.Add("myapp-deviceId", "univsersal app");

    HttpClient client = new HttpClient();

    // 利用 SendRequestAsync() 送出 HttpRequestMessage

    // await 後取得 HttpResponseMessage

    var response = await client.SendRequestAsync(requestMsg);

    String result = String.Empty;

    try

    {

        // 利用 EnsureSuccessStatusCode 確認是否成功

        // 如果失敗，EnsureSuccessStatusCode 會送出 Exception

        response.EnsureSuccessStatusCode();

        // 將 Http Content 轉換成 文字

        result = await response.Content.ReadAsStringAsync();

    }

    catch (Exception ex)

    {

        result = ex.Message;

    }

}

private void SetCookie()

{

    HttpCookie cookie = new HttpCookie("userId", "dotblogs.com.tw", "http://www.dotblogs.com.tw");

    cookie.Value = "Pou";

    cookie.Expires = DateTime.UtcNow.Date.AddMinutes(3);

    cookie.HttpOnly = true;

    cookie.Secure = true;

    // 取得 HttpClient 預設使用的 HttpBaseProtocolFilter 元素

    HttpBaseProtocolFilter filter = new HttpBaseProtocolFilter();

    // 放入 Cookie

    bool replaced = filter.CookieManager.SetCookie(cookie, false);

    HttpClient client = new HttpClient(filter);

}

private void GetCookie()

{          

    HttpBaseProtocolFilter filter = new HttpBaseProtocolFilter();

    HttpCookieCollection cookieCollection = filter.CookieManager.GetCookies(

                                new Uri("http://www.dotblogs.com.tw"));

    foreach (var item in cookieCollection)

    {

        String value = String.Format("key: {0}, value: {1}", item.Name, item.Value);

    }

}

public async void LoadRemoteMusicFile(String id, String pwd)

{

    HttpRequestMessage requestMsg = new HttpRequestMessage(

                                        HttpMethod.Get, 

                                        new Uri(""));

    requestMsg.Headers.Add("uid", WebUtility.UrlEncode(id));

    requestMsg.Headers.Add("pwd", WebUtility.UrlEncode(pwd));

    // 利用 HttpRequestMessage 與 HttpResponseMessage 來操作

    HttpClient client = new HttpClient();

    var responseMsg = await client.SendRequestAsync(requestMsg);

    try

    {

        responseMsg.EnsureSuccessStatusCode();

        // 在 Local Folder 建立要儲存的檔案

        StorageFile musicFile = await GetMusicFile("temp.mp3");

        // 將 StorageFile 開啟可寫入的 Stream

        IRandomAccessStream writeStream = await musicFile.OpenAsync(FileAccessMode.ReadWrite);

        // 將 Http response 收到的 http content 寫入 Stream

        ulong writeLengths = await responseMsg.Content.WriteToStreamAsync(writeStream);

        ulong length = 0;

        responseMsg.Content.TryComputeLength(out length);

        // 判斷是否完整寫入

        if (writeLengths == length)

        {

            MediaElement media = new MediaElement();

            media.Source = new Uri("ms-appdata:///local/temp.mp3");

            media.AutoPlay = true;                    

            content.Children.Add(media);

        }

    }

    catch (Exception ex)

    {

        // handle exception

    }

}

private async Task<StorageFile> GetMusicFile(String name)

{

    StorageFolder local = ApplicationData.Current.LocalFolder;

    StorageFile file = null;

    try

    {

        file = await local.GetFileAsync(name);

    }

    catch (FileNotFoundException) { }

    if (file == null)

    {

        file = await local.CreateFileAsync(name, CreationCollisionOption.ReplaceExisting);

    }

    return file;

}

private async void SendStringPostData()

{

    // 傳送 文字 內容

    HttpStringContent strContent = new HttpStringContent("hello world");

    HttpClient client = new HttpClient();

    var response = await client.PostAsync(new Uri("http://localhost:4347/WebForm1.aspx"), strContent);

    try

    {

        response.EnsureSuccessStatusCode();

        // 取得回傳結果

        String result = await response.Content.ReadAsStringAsync();

    }

    catch (Exception)

    {

        // handle exception

    }

}

private async void SendMultiFormContent()

{

    try

    {

        // 利用 HttpMultipartFormDataContent 逐一加入要傳送的參數

        HttpMultipartFormDataContent form = new HttpMultipartFormDataContent();

        form.Add(new HttpStringContent("Pou"), "key");

        form.Add(new HttpStringContent("Windows Phone"), "value");

        HttpClient client = new HttpClient();

        HttpResponseMessage response = await client.PostAsync(new Uri("http://localhost:4347/WebForm1.aspx"), form);

        response.EnsureSuccessStatusCode();

        String result = await response.Content.ReadAsStringAsync();

    }

    catch (TaskCanceledException)

    {

    }

    catch (Exception ex)

    {

    }

    finally

    {

    }

}

private async void PostStreamData()

{

    try

    {

        Uri uri = new Uri("http://localhost:4347/WebForm1.aspx");

        // 在 Local Folder 建立要儲存的檔案

        StorageFile musicFile = await GetMusicFile("temp.mp3");

        Stream stream = await musicFile.OpenStreamForReadAsync();

        // 利用 HttpStreamContent 包裝要送出的 Stream

        HttpStreamContent streamContent = new HttpStreamContent(stream.AsInputStream());

        HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, uri);

        request.Content = streamContent;

        // Do an asynchronous POST.

        HttpClient client = new HttpClient();

        HttpResponseMessage response = await client.SendRequestAsync(request);

    }

    catch (Exception)

    {

    }

}

private void ChangeHttpHeader()

{

    HttpClient httpClient = new HttpClient();

    // Add a user-agent header

    var headers = httpClient.DefaultRequestHeaders;

    // 加入需要的 Header

    headers.UserAgent.ParseAdd("ie");

    headers.UserAgent.ParseAdd("Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)");

}

public async void LoadRemoteMusicFile(String id, String pwd)

{

    HttpRequestMessage requestMsg = new HttpRequestMessage(

                                        HttpMethod.Get, 

                                        new Uri("https://dl.dropboxusercontent.com/u/18944013/illa%20illa%20.mp3"));

    requestMsg.Headers.Add("uid", WebUtility.UrlEncode(id));

    requestMsg.Headers.Add("pwd", WebUtility.UrlEncode(pwd));

    // 加入 Progress Handler

    Progress<HttpProgress> progressCallback = new Progress<HttpProgress>(OnSendRequestProgress);

    var tokenSource = new CancellationTokenSource();

    // 利用 HttpRequestMessage 與 HttpResponseMessage 來操作

    HttpClient client = new HttpClient();

    var responseMsg = await client.SendRequestAsync(requestMsg).AsTask(tokenSource.Token, progressCallback);

    try

    {

        responseMsg.EnsureSuccessStatusCode();

        // 在 Local Folder 建立要儲存的檔案

        StorageFile musicFile = await GetMusicFile("temp.mp3");

        // 將 StorageFile 開啟可寫入的 Stream

        IRandomAccessStream writeStream = await musicFile.OpenAsync(FileAccessMode.ReadWrite);

        // 將 Http response 收到的 http content 寫入 Stream

        ulong writeLengths = await responseMsg.Content.WriteToStreamAsync(writeStream);

        ulong length = 0;

        responseMsg.Content.TryComputeLength(out length);

        // 判斷是否完整寫入

        if (writeLengths == length)

        {

            MediaElement media = new MediaElement();

            media.Source = new Uri("ms-appdata:///local/temp.mp3");

            media.AutoPlay = true;                    

            content.Children.Add(media);

        }

    }

    catch (Exception ex)

    {

        // handle exception

    }

}

private void OnSendRequestProgress(HttpProgress obj)

{

    // 更新畫面中的 ProgressBar

    this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.High,

        () => {

            btnBar.Minimum = 0;

            btnBar.Value = obj.BytesReceived;

            if (obj.TotalBytesToReceive != null)

                btnBar.Maximum = (double)obj.TotalBytesToReceive;

        });

}