标签: dotnet-httpclient

有谁知道如何向WebView控件提供凭据（甚至更好-在特定域用户的上下文中运行Windows 8 Metro风格的应用程序/ WinRT应用程序？）我尝试按照此处列出的HttpClient + WebView方法进行操作（ http://social.msdn.microsoft.com/Forums/zh-CN/winappswithcsharp/thread/05e46a0a-e913-469d-a4a5-4a805dcf158a），但它仍提示用户输入凭据，因为在返回的内容中有指向安全物品。

我有一个NetworkCredential对象，我非常想将其应用于所进行的每个HTTP调用。

当然一定有人做过吗？:)

我有一个方法尝试从并行的几个URL下载数据,并返回一个IEnumerable反序列化类型

该方法如下所示:

    public IEnumerable<TContent> DownloadContentFromUrls(IEnumerable<string> urls)
    {
        var list = new List<TContent>();

        Parallel.ForEach(urls, url =>
        {
            lock (list)
            {
                _httpClient.GetAsync(url).ContinueWith(request =>
                {
                    var response = request.Result;
                    //todo ensure success?

                    response.Content.ReadAsStringAsync().ContinueWith(text =>
                    {
                        var results = JObject.Parse(text.Result)
                            .ToObject<IEnumerable<TContent>>();

                        list.AddRange(results);
                    });
                });
            }
        });

        return list;
    }

在我的单元测试中(我存根_httpClient返回一组已知的文本)我基本上得到了

序列不包含任何元素

这是因为该方法在任务完成之前返回.

如果我在.ContinueWith()调用结束时添加.Wait(),它会通过,但我确定我在这里滥用了API ...

我想在C#中使用sonicAPI文件/上传API.

我尝试将curl示例转换为C#with HttpClient并MultipartFormDataContent返回错误400 /错误请求.

回复内容:

<?xml version="1.0" encoding="UTF-8"?>
<response>
   <status code="400" />
   <errors>
      <error message="File upload failed: file is missing." parameter="file" error_code="10" />
   </errors>
</response>

文档中显示的curl命令行示例:

curl https://api.sonicapi.com/file/upload?access_id=$ACCESS_ID -Ffile=@Vocals.mp3

到目前为止我编写的代码:

public async Task<HttpResponseMessage> Post(string id, string fileName)
{
    string url = string.Format("http://api.sonicapi.com/file/upload?access_id={0}", id);
    var stream = new FileStream(fileName, FileMode.Open);

    var client = new HttpClient { Timeout = TimeSpan.FromMinutes(10) };
    var content = new MultipartFormDataContent();
    content.Add(new StreamContent(stream), "file");

    HttpResponseMessage message = await client.PostAsync(url, content); …

我正在使用.NET HttpClient向我的服务器发送请求.我已将HttpClient.Timeout属性设置为10秒,因此A task was cancelled每当服务器无法在不到10秒的时间内处理我的请求时,我就会收到异常.好到这里.

但是,如果关闭服务器,则需要HttpClient大约20秒才能返回正确的异常,例如图片中的异常.

我想看到这个异常超过1​​0秒才能区分Server Down和Operation花了太长时间的情况.我在msdn文档中找不到任何相关内容.是否有可以设置的超时HttpClient？

这是我如何构建的 HttpClient

 var webRequestHandler = new WebRequestHandler
        {
            UseProxy = false,
            Proxy = null,
            AllowPipelining = false,
            ContinueTimeout = TimeSpan.Zero,
            UseCookies = false,
            AllowAutoRedirect = false,
        };
 var httpClient = new HttpClient(webRequestHandler);
 httpClient.Timeout = timeout;

  httpClient.DefaultRequestHeaders.TryAddWithoutValidation("Accept", "application/json");
  httpClient.DefaultRequestHeaders.TryAddWithoutValidation("User-Agent", userAgent);
  httpClient.DefaultRequestHeaders.ExpectContinue = false;

我System.net.http在Windows Phone 8.1应用程序中使用,直到遇到自签名和不受信任的证书问题.

那么现在,我正在使用Windows.Web.Http框架.一切都很好,除了我找不到ByteArrayContent与IHttpContent界面相同的东西.以同样的方式,IHttpContent没有相同的方法ReadAsByteArrayAsync.

我正在使用ByteArrayContent和ReadAsByteArrayAsync通过HttpClient发送和获取文件.

什么是正确的方法？

谢谢!

我正在尝试将一个调用包装到PostAsync,所以我不必在我的代码库中重新编码调用序列.我遇到的问题是我从调用中分配的HttpResponseMessage与我的方法调用的消费者不同.这是代码:

internal class RestHttpClient
{
    public HttpResponseMessage ResponseMessage = new HttpResponseMessage();

    public async void SendRequest(string adaptiveUri, string xmlRequest)
    {
        using (HttpClient httpClient = new HttpClient())
        {
            StringContent httpConent = new StringContent(xmlRequest, Encoding.UTF8);

            try
            {
                ResponseMessage = await httpClient.PostAsync(adaptiveUri, httpConent);
            }
            catch (Exception ex)
            {
                ResponseMessage.StatusCode = HttpStatusCode.InternalServerError;
                ResponseMessage.ReasonPhrase = string.Format("RestHttpClient.SendRequest failed: {0}", ex);
            }
        }
    }
}

我试图调用该方法如下:

RestHttpClient restHttpClient = new RestHttpClient();

restHttpClient.SendRequest(adaptiveUri, xmlRequest);

return restHttpClient.ResponseMessage;

当我进行调用时,ResponseMessage对象始终包含Ok状态,即使这不是从PostAsync调用实际返回的内容.

情景:
首先,请考虑我正在使用HttpClient课程,不是WebRequest,我知道这里有很多相关问题,但所有答案都是针对WebRequest的.

我制作了一个Web Api应用程序,以这种方式设置以下标题,以便下载.txt文件:

resp.Content = new StringContent(result, System.Text.Encoding.UTF8, "text/plain");
resp.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment")
{
    FileName = _datacontext.GetAppConfig("814FileNameHeader") + DateTime.Now.ToString("yyyyMMdd") + ".txt"
};
resp.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");  

之后我从其他应用程序中创建了一个HttpClient来连接到这个方法.
一切正常,检索200和文件的内容.但我无法获取标题以读取文件名.

TRIES MADE:

使用REST客户端我可以阅读以下标头属性:

内容 - 处理:附件; 文件名= 814Entes_PG_20160114.txt

从代码我可以调试它,我发现标题是在"invalidHeaders",但我无法达到值:

题:

我如何设置这个并毫无疑问地从客户那里获得？

更新:

这些是我尝试获取标题:原始:

                using (var httpClient = new HttpClient())
            {
                httpClient.BaseAddress = new Uri(uri);
                string authentication = string.Concat(authenticationArgs[0], ":", authenticationArgs[1]);
                httpClient.DefaultRequestHeaders.TryAddWithoutValidation("Authorization", "Basic " + Base64Encode(authentication));
                httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                HttpRequestMessage req = new HttpRequestMessage(HttpMethod.Post, "Report/" + type);
                req.Content = …

我正在尝试使用dotnet核心应用程序中的WebAPI为请求指定Web代理.当我定位实际的clr(dnx46)时,这段代码曾经工作但是,现在我正在尝试使用rc2的东西,说支持的框架是netcoreapp1.0和netstandard1.5.

var clientHandler = new HttpClientHandler{
    Proxy = string.IsNullOrWhiteSpace(this._clientSettings.ProxyUrl) ? null : new WebProxy (this._clientSettings.ProxyUrl, this._clientSettings.BypassProxyOnLocal),
    UseProxy = !string.IsNullOrWhiteSpace(this._clientSettings.ProxyUrl)
};

我想知道WebProxy类去了哪里.我无法在任何地方找到它,甚至在github存储库中也找不到它.如果它从WebProxy改变了,它改变了什么？我需要能够将代理设置为特定请求的特定URL,因此使用"全局Internet Explorer"方式不能满足我的需求.这主要用于调试Web请求/响应目的.

对于下面的代码,它在调用时捕获HttpRequestException/System.Net.Http.WinHttpException

异常状态:NativeErrorCode 12175
消息"发生安全性错误"

• e {System.Net.Http.HttpRequestException:发送请求时发生错误.---> System.Net.Http.WinHttpException:System.Runtime.CompilerServices.ConfiguredTaskAwaitable上System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务任务)的System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()发生安全性错误.__CODE__1.ConfiguredTaskAwaiter.GetResult()at System.Net.Http.HttpClient.d__58.MoveNext()---从抛出异常的先前位置开始的堆栈跟踪结束---在System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在Controllers.Controller.d__0.MoveNext()的System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()上的System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务任务)

但是在相同的端点,资源,标题和正文上使用Postman,我得到200回.

NativeErrorCode 12175   
Message "A security error occurred"

-       e   {System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.Http.WinHttpException: A security error occurred
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at System.Net.Http.WinHttpHandler.<StartRequest>d__105.MoveNext()
   --- End of inner exception stack trace ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at System.Net.Http.HttpClient.<FinishSendAsync>d__58.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() …

我有Asp.Net Core WebApi。我正在根据HttpClientFactory模式发出Http请求。这是我的示例代码：

public void ConfigureServices(IServiceCollection services)
{
    ...
    services.AddHttpClient<IMyInterface, MyService>();
    ...
}

public class MyService: IMyInterface
{
    private readonly HttpClient _client;

    public MyService(HttpClient client)
    {
        _client = client;
    }

    public async Task CallHttpEndpoint()
    {
        var request = new HttpRequestMessage(HttpMethod.Get, "www.customUrl.com");
        var response = await _client.SendAsync(request);
        ...
    }

}

我想通过动态代理实现发送请求。这基本上意味着我可能需要针对每个请求更改代理。到目前为止，我发现了2种方法，对我来说似乎没有一种是好的：

1.有一个像这样的静态代理：

public void ConfigureServices(IServiceCollection services)
{
    ...
    services.AddHttpClient<IMyInterface, MyService>().ConfigurePrimaryHttpMessageHandler(() =>
        {
            return new HttpClientHandler
            {
                Proxy = new WebProxy("http://127.0.0.1:8888"),
                UseProxy = true
            };
        });
    ...
} …