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HttpClient.cs
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HttpClient.cs
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// Decompiled with JetBrains decompiler
// Type: System.Net.Http.HttpClient
// Assembly: System.Net.Http, Version=4.2.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
// MVID: D8D12B97-8555-48F6-96B3-BBC6BF89FCBA
// Assembly location: C:\Program Files\dotnet\shared\Microsoft.NETCore.App\3.1.1\System.Net.Http.dll
using System.Globalization;
using System.IO;
using System.Net.Http.Headers;
using System.Threading;
using System.Threading.Tasks;
namespace System.Net.Http
{
/// <summary>提供基本类,用于发送 HTTP 请求和接收来自通过 URI 确认的资源的 HTTP 响应。</summary>
public class HttpClient : HttpMessageInvoker
{
private static readonly TimeSpan s_defaultTimeout = TimeSpan.FromSeconds(100.0);
private static readonly TimeSpan s_maxTimeout = TimeSpan.FromMilliseconds((double) int.MaxValue);
private static readonly TimeSpan s_infiniteTimeout = System.Threading.Timeout.InfiniteTimeSpan;
private Version _defaultRequestVersion = HttpUtilities.DefaultRequestVersion;
private static IWebProxy s_defaultProxy;
private volatile bool _operationStarted;
private volatile bool _disposed;
private CancellationTokenSource _pendingRequestsCts;
private HttpRequestHeaders _defaultRequestHeaders;
private Uri _baseAddress;
private TimeSpan _timeout;
private int _maxResponseContentBufferSize;
public static IWebProxy DefaultProxy
{
get
{
return LazyInitializer.EnsureInitialized<IWebProxy>(ref HttpClient.s_defaultProxy, (Func<IWebProxy>) (() => SystemProxyInfo.Proxy));
}
set
{
IWebProxy webProxy = value;
if (webProxy == null)
throw new ArgumentNullException(nameof (value));
HttpClient.s_defaultProxy = webProxy;
}
}
/// <summary>获取与每个请求一起发送的标题。</summary>
/// <returns>应与每一个请求一起发送的标题。</returns>
public HttpRequestHeaders DefaultRequestHeaders
{
get
{
if (this._defaultRequestHeaders == null)
this._defaultRequestHeaders = new HttpRequestHeaders();
return this._defaultRequestHeaders;
}
}
public Version DefaultRequestVersion
{
get
{
return this._defaultRequestVersion;
}
set
{
this.CheckDisposedOrStarted();
Version version = value;
if ((object) version == null)
throw new ArgumentNullException(nameof (value));
this._defaultRequestVersion = version;
}
}
/// <summary>获取或设置发送请求时使用的 Internet 资源的统一资源标识符 (URI) 的基址。</summary>
/// <returns>发送请求时使用的 Internet 资源的统一资源标识符 (URI) 的基址。</returns>
public Uri BaseAddress
{
get
{
return this._baseAddress;
}
set
{
HttpClient.CheckBaseAddress(value, nameof (value));
this.CheckDisposedOrStarted();
if (NetEventSource.IsEnabled)
NetEventSource.UriBaseAddress((object) this, value);
this._baseAddress = value;
}
}
/// <summary>获取或设置请求超时前等待的时间跨度。</summary>
/// <returns>请求超时前等待的时间跨度。</returns>
/// <exception cref="T:System.ArgumentOutOfRangeException">指定的超时值小于或等于零,而不是 <see cref="F:System.Threading.Timeout.InfiniteTimeSpan" />。</exception>
/// <exception cref="T:System.InvalidOperationException">已在当前实例上启动了一个操作。</exception>
/// <exception cref="T:System.ObjectDisposedException">已释放当前实例。</exception>
public TimeSpan Timeout
{
get
{
return this._timeout;
}
set
{
if (value != HttpClient.s_infiniteTimeout && (value <= TimeSpan.Zero || value > HttpClient.s_maxTimeout))
throw new ArgumentOutOfRangeException(nameof (value));
this.CheckDisposedOrStarted();
this._timeout = value;
}
}
/// <summary>获取或设置读取响应内容时要缓冲的最大字节数。</summary>
/// <returns>当读取响应内容时缓冲区的最大字节数。 此属性的默认值为 2 GB。</returns>
/// <exception cref="T:System.ArgumentOutOfRangeException">指定大小小于或等于零。</exception>
/// <exception cref="T:System.InvalidOperationException">已在当前实例上启动了一个操作。</exception>
/// <exception cref="T:System.ObjectDisposedException">已释放当前实例。</exception>
public long MaxResponseContentBufferSize
{
get
{
return (long) this._maxResponseContentBufferSize;
}
set
{
if (value <= 0L)
throw new ArgumentOutOfRangeException(nameof (value));
if (value > (long) int.MaxValue)
throw new ArgumentOutOfRangeException(nameof (value), (object) value, SR.Format((IFormatProvider) CultureInfo.InvariantCulture, SR.net_http_content_buffersize_limit, (object) int.MaxValue));
this.CheckDisposedOrStarted();
this._maxResponseContentBufferSize = (int) value;
}
}
/// <summary>初始化 <see cref="T:System.Net.Http.HttpClient" /> 类的新实例。</summary>
public HttpClient()
: this((HttpMessageHandler) new HttpClientHandler())
{
}
/// <summary>用特定的处理程序初始化 <see cref="T:System.Net.Http.HttpClient" /> 类的新实例。</summary>
/// <param name="handler">要用于发送请求的 HTTP 处理程序堆栈。</param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="handler" /> 为 <see langword="null" />。</exception>
public HttpClient(HttpMessageHandler handler)
: this(handler, true)
{
}
/// <summary>用特定的处理程序初始化 <see cref="T:System.Net.Http.HttpClient" /> 类的新实例。</summary>
/// <param name="handler">负责处理 HTTP 响应消息的 <see cref="T:System.Net.Http.HttpMessageHandler" />。</param>
/// <param name="disposeHandler">如果内部处理程序应由 HttpClient.Dispose 处置,则为 <see langword="true" />,如果希望重新使用内部处理程序,则为 <see langword="false" />。</param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="handler" /> 为 <see langword="null" />。</exception>
public HttpClient(HttpMessageHandler handler, bool disposeHandler)
: base(handler, disposeHandler)
{
this._timeout = HttpClient.s_defaultTimeout;
this._maxResponseContentBufferSize = int.MaxValue;
this._pendingRequestsCts = new CancellationTokenSource();
}
/// <summary>将 GET 请求发送到指定 URI 并在异步操作中以字符串的形式返回响应正文。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<string> GetStringAsync(string requestUri)
{
return this.GetStringAsync(this.CreateUri(requestUri));
}
/// <summary>将 GET 请求发送到指定 URI 并在异步操作中以字符串的形式返回响应正文。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<string> GetStringAsync(Uri requestUri)
{
return this.GetStringAsyncCore(this.GetAsync(requestUri, HttpCompletionOption.ResponseHeadersRead));
}
private async Task<string> GetStringAsyncCore(Task<HttpResponseMessage> getTask)
{
using (HttpResponseMessage responseMessage = await getTask.ConfigureAwait(false))
{
responseMessage.EnsureSuccessStatusCode();
HttpContent content = responseMessage.Content;
if (content != null)
{
HttpContentHeaders headers = content.Headers;
Stream stream = content.TryReadAsStream();
if (stream == null)
stream = await content.ReadAsStreamAsync().ConfigureAwait(false);
using (Stream responseStream = stream)
{
using (HttpContent.LimitArrayPoolWriteStream buffer = new HttpContent.LimitArrayPoolWriteStream(this._maxResponseContentBufferSize, (long) (int) headers.ContentLength.GetValueOrDefault()))
{
try
{
await responseStream.CopyToAsync((Stream) buffer).ConfigureAwait(false);
}
catch (Exception ex) when (HttpContent.StreamCopyExceptionNeedsWrapping(ex))
{
throw HttpContent.WrapStreamCopyException(ex);
}
if (buffer.Length > 0L)
return HttpContent.ReadBufferAsString(buffer.GetBuffer(), headers);
}
}
headers = (HttpContentHeaders) null;
}
return string.Empty;
}
}
/// <summary>将 GET 请求发送到指定 URI 并在异步操作中以字节数组的形式返回响应正文。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<byte[]> GetByteArrayAsync(string requestUri)
{
return this.GetByteArrayAsync(this.CreateUri(requestUri));
}
/// <summary>将 GET 请求发送到指定 URI 并在异步操作中以字节数组的形式返回响应正文。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<byte[]> GetByteArrayAsync(Uri requestUri)
{
return this.GetByteArrayAsyncCore(this.GetAsync(requestUri, HttpCompletionOption.ResponseHeadersRead));
}
private async Task<byte[]> GetByteArrayAsyncCore(Task<HttpResponseMessage> getTask)
{
using (HttpResponseMessage responseMessage = await getTask.ConfigureAwait(false))
{
responseMessage.EnsureSuccessStatusCode();
HttpContent content = responseMessage.Content;
if (content != null)
{
HttpContentHeaders headers = content.Headers;
Stream stream = content.TryReadAsStream();
if (stream == null)
stream = await content.ReadAsStreamAsync().ConfigureAwait(false);
using (Stream responseStream = stream)
{
long? contentLength = headers.ContentLength;
Stream buffer;
if (contentLength.HasValue)
{
buffer = (Stream) new HttpContent.LimitMemoryStream(this._maxResponseContentBufferSize, (int) contentLength.GetValueOrDefault());
try
{
await responseStream.CopyToAsync(buffer).ConfigureAwait(false);
}
catch (Exception ex) when (HttpContent.StreamCopyExceptionNeedsWrapping(ex))
{
throw HttpContent.WrapStreamCopyException(ex);
}
if (buffer.Length > 0L)
return ((HttpContent.LimitMemoryStream) buffer).GetSizedBuffer();
}
else
{
buffer = (Stream) new HttpContent.LimitArrayPoolWriteStream(this._maxResponseContentBufferSize);
try
{
try
{
await responseStream.CopyToAsync(buffer).ConfigureAwait(false);
}
catch (Exception ex) when (HttpContent.StreamCopyExceptionNeedsWrapping(ex))
{
throw HttpContent.WrapStreamCopyException(ex);
}
if (buffer.Length > 0L)
return ((HttpContent.LimitArrayPoolWriteStream) buffer).ToArray();
}
finally
{
buffer.Dispose();
}
}
buffer = (Stream) null;
}
headers = (HttpContentHeaders) null;
}
return Array.Empty<byte>();
}
}
/// <summary>将 GET 请求发送到指定 URI 并在异步操作中以流的形式返回响应正文。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<Stream> GetStreamAsync(string requestUri)
{
return this.GetStreamAsync(this.CreateUri(requestUri));
}
/// <summary>将 GET 请求发送到指定 URI 并在异步操作中以流的形式返回响应正文。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<Stream> GetStreamAsync(Uri requestUri)
{
return this.FinishGetStreamAsync(this.GetAsync(requestUri, HttpCompletionOption.ResponseHeadersRead));
}
private async Task<Stream> FinishGetStreamAsync(Task<HttpResponseMessage> getTask)
{
HttpResponseMessage httpResponseMessage = await getTask.ConfigureAwait(false);
httpResponseMessage.EnsureSuccessStatusCode();
HttpContent content = httpResponseMessage.Content;
Stream stream1;
if (content != null)
{
Stream stream2 = content.TryReadAsStream();
if (stream2 == null)
stream2 = await content.ReadAsStreamAsync().ConfigureAwait(false);
stream1 = stream2;
}
else
stream1 = Stream.Null;
return stream1;
}
/// <summary>以异步操作将 GET 请求发送给指定 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> GetAsync(string requestUri)
{
return this.GetAsync(this.CreateUri(requestUri));
}
/// <summary>以异步操作将 GET 请求发送给指定 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> GetAsync(Uri requestUri)
{
return this.GetAsync(requestUri, HttpCompletionOption.ResponseContentRead);
}
/// <summary>用以异步操作的 HTTP 完成选项发送 GET 请求到指定的 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="completionOption">指示操作应视为已完成的时间的 HTTP 完成选项值。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> GetAsync(
string requestUri,
HttpCompletionOption completionOption)
{
return this.GetAsync(this.CreateUri(requestUri), completionOption);
}
/// <summary>用以异步操作的 HTTP 完成选项发送 GET 请求到指定的 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="completionOption">指示操作应视为已完成的时间的 HTTP 完成选项值。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> GetAsync(
Uri requestUri,
HttpCompletionOption completionOption)
{
return this.GetAsync(requestUri, completionOption, CancellationToken.None);
}
/// <summary>用以异步操作的取消标记发送 GET 请求到指定的 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="cancellationToken">可由其他对象或线程用以接收取消通知的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> GetAsync(
string requestUri,
CancellationToken cancellationToken)
{
return this.GetAsync(this.CreateUri(requestUri), cancellationToken);
}
/// <summary>用以异步操作的取消标记发送 GET 请求到指定的 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="cancellationToken">可由其他对象或线程用以接收取消通知的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> GetAsync(
Uri requestUri,
CancellationToken cancellationToken)
{
return this.GetAsync(requestUri, HttpCompletionOption.ResponseContentRead, cancellationToken);
}
/// <summary>用以异步操作的 HTTP 完成选项和取消标记发送 GET 请求到指定的 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="completionOption">指示操作应视为已完成的时间的 HTTP 完成选项值。</param>
/// <param name="cancellationToken">可由其他对象或线程用以接收取消通知的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> GetAsync(
string requestUri,
HttpCompletionOption completionOption,
CancellationToken cancellationToken)
{
return this.GetAsync(this.CreateUri(requestUri), completionOption, cancellationToken);
}
/// <summary>用以异步操作的 HTTP 完成选项和取消标记发送 GET 请求到指定的 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="completionOption">指示操作应视为已完成的时间的 HTTP 完成选项值。</param>
/// <param name="cancellationToken">可由其他对象或线程用以接收取消通知的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> GetAsync(
Uri requestUri,
HttpCompletionOption completionOption,
CancellationToken cancellationToken)
{
return this.SendAsync(this.CreateRequestMessage(HttpMethod.Get, requestUri), completionOption, cancellationToken);
}
/// <summary>以异步操作将 POST 请求发送给指定 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="content">发送到服务器的 HTTP 请求内容。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> PostAsync(
string requestUri,
HttpContent content)
{
return this.PostAsync(this.CreateUri(requestUri), content);
}
/// <summary>以异步操作将 POST 请求发送给指定 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="content">发送到服务器的 HTTP 请求内容。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> PostAsync(
Uri requestUri,
HttpContent content)
{
return this.PostAsync(requestUri, content, CancellationToken.None);
}
/// <summary>用以异步操作的取消标记发送 POST 请求。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="content">发送到服务器的 HTTP 请求内容。</param>
/// <param name="cancellationToken">可由其他对象或线程用以接收取消通知的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> PostAsync(
string requestUri,
HttpContent content,
CancellationToken cancellationToken)
{
return this.PostAsync(this.CreateUri(requestUri), content, cancellationToken);
}
/// <summary>用以异步操作的取消标记发送 POST 请求。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="content">发送到服务器的 HTTP 请求内容。</param>
/// <param name="cancellationToken">可由其他对象或线程用以接收取消通知的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> PostAsync(
Uri requestUri,
HttpContent content,
CancellationToken cancellationToken)
{
HttpRequestMessage requestMessage = this.CreateRequestMessage(HttpMethod.Post, requestUri);
requestMessage.Content = content;
return this.SendAsync(requestMessage, cancellationToken);
}
/// <summary>以异步操作将 PUT 请求发送给指定 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="content">发送到服务器的 HTTP 请求内容。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> PutAsync(
string requestUri,
HttpContent content)
{
return this.PutAsync(this.CreateUri(requestUri), content);
}
/// <summary>以异步操作将 PUT 请求发送给指定 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="content">发送到服务器的 HTTP 请求内容。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> PutAsync(
Uri requestUri,
HttpContent content)
{
return this.PutAsync(requestUri, content, CancellationToken.None);
}
/// <summary>用以异步操作的取消标记发送 PUT 请求。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="content">发送到服务器的 HTTP 请求内容。</param>
/// <param name="cancellationToken">可由其他对象或线程用以接收取消通知的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> PutAsync(
string requestUri,
HttpContent content,
CancellationToken cancellationToken)
{
return this.PutAsync(this.CreateUri(requestUri), content, cancellationToken);
}
/// <summary>用以异步操作的取消标记发送 PUT 请求。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="content">发送到服务器的 HTTP 请求内容。</param>
/// <param name="cancellationToken">可由其他对象或线程用以接收取消通知的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> PutAsync(
Uri requestUri,
HttpContent content,
CancellationToken cancellationToken)
{
HttpRequestMessage requestMessage = this.CreateRequestMessage(HttpMethod.Put, requestUri);
requestMessage.Content = content;
return this.SendAsync(requestMessage, cancellationToken);
}
public Task<HttpResponseMessage> PatchAsync(
string requestUri,
HttpContent content)
{
return this.PatchAsync(this.CreateUri(requestUri), content);
}
public Task<HttpResponseMessage> PatchAsync(
Uri requestUri,
HttpContent content)
{
return this.PatchAsync(requestUri, content, CancellationToken.None);
}
public Task<HttpResponseMessage> PatchAsync(
string requestUri,
HttpContent content,
CancellationToken cancellationToken)
{
return this.PatchAsync(this.CreateUri(requestUri), content, cancellationToken);
}
public Task<HttpResponseMessage> PatchAsync(
Uri requestUri,
HttpContent content,
CancellationToken cancellationToken)
{
HttpRequestMessage requestMessage = this.CreateRequestMessage(HttpMethod.Patch, requestUri);
requestMessage.Content = content;
return this.SendAsync(requestMessage, cancellationToken);
}
/// <summary>以异步操作将 DELETE 请求发送给指定 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.InvalidOperationException">请求消息已由 <see cref="T:System.Net.Http.HttpClient" /> 实例发送。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> DeleteAsync(string requestUri)
{
return this.DeleteAsync(this.CreateUri(requestUri));
}
/// <summary>以异步操作将 DELETE 请求发送给指定 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.InvalidOperationException">请求消息已由 <see cref="T:System.Net.Http.HttpClient" /> 实例发送。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> DeleteAsync(Uri requestUri)
{
return this.DeleteAsync(requestUri, CancellationToken.None);
}
/// <summary>用以异步操作的取消标记发送 DELETE 请求到指定的 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="cancellationToken">可由其他对象或线程用以接收取消通知的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.InvalidOperationException">请求消息已由 <see cref="T:System.Net.Http.HttpClient" /> 实例发送。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> DeleteAsync(
string requestUri,
CancellationToken cancellationToken)
{
return this.DeleteAsync(this.CreateUri(requestUri), cancellationToken);
}
/// <summary>用以异步操作的取消标记发送 DELETE 请求到指定的 URI。</summary>
/// <param name="requestUri">请求发送到的 URI。</param>
/// <param name="cancellationToken">可由其他对象或线程用以接收取消通知的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="requestUri" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.InvalidOperationException">请求消息已由 <see cref="T:System.Net.Http.HttpClient" /> 实例发送。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> DeleteAsync(
Uri requestUri,
CancellationToken cancellationToken)
{
return this.SendAsync(this.CreateRequestMessage(HttpMethod.Delete, requestUri), cancellationToken);
}
/// <summary>以异步操作发送 HTTP 请求。</summary>
/// <param name="request">要发送的 HTTP 请求消息。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="request" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.InvalidOperationException">请求消息已由 <see cref="T:System.Net.Http.HttpClient" /> 实例发送。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> SendAsync(HttpRequestMessage request)
{
return this.SendAsync(request, HttpCompletionOption.ResponseContentRead, CancellationToken.None);
}
/// <summary>以异步操作发送 HTTP 请求。</summary>
/// <param name="request">要发送的 HTTP 请求消息。</param>
/// <param name="cancellationToken">取消操作的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="request" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.InvalidOperationException">请求消息已由 <see cref="T:System.Net.Http.HttpClient" /> 实例发送。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public override Task<HttpResponseMessage> SendAsync(
HttpRequestMessage request,
CancellationToken cancellationToken)
{
return this.SendAsync(request, HttpCompletionOption.ResponseContentRead, cancellationToken);
}
/// <summary>以异步操作发送 HTTP 请求。</summary>
/// <param name="request">要发送的 HTTP 请求消息。</param>
/// <param name="completionOption">操作应完成时(在响应可利用或在读取整个响应内容之后)。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="request" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.InvalidOperationException">请求消息已由 <see cref="T:System.Net.Http.HttpClient" /> 实例发送。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> SendAsync(
HttpRequestMessage request,
HttpCompletionOption completionOption)
{
return this.SendAsync(request, completionOption, CancellationToken.None);
}
/// <summary>以异步操作发送 HTTP 请求。</summary>
/// <param name="request">要发送的 HTTP 请求消息。</param>
/// <param name="completionOption">操作应完成时(在响应可利用或在读取整个响应内容之后)。</param>
/// <param name="cancellationToken">取消操作的取消标记。</param>
/// <returns>表示异步操作的任务对象。</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="request" /> 为 <see langword="null" />。</exception>
/// <exception cref="T:System.InvalidOperationException">请求消息已由 <see cref="T:System.Net.Http.HttpClient" /> 实例发送。</exception>
/// <exception cref="T:System.Net.Http.HttpRequestException">由于基础问题(如网络连接性、DNS 失败、服务器证书验证或超时),请求失败。</exception>
public Task<HttpResponseMessage> SendAsync(
HttpRequestMessage request,
HttpCompletionOption completionOption,
CancellationToken cancellationToken)
{
if (request == null)
throw new ArgumentNullException(nameof (request));
this.CheckDisposed();
HttpClient.CheckRequestMessage(request);
this.SetOperationStarted();
this.PrepareRequestMessage(request);
bool flag = this._timeout != HttpClient.s_infiniteTimeout;
bool disposeCts;
CancellationTokenSource cts;
if (flag || cancellationToken.CanBeCanceled)
{
disposeCts = true;
cts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, this._pendingRequestsCts.Token);
if (flag)
cts.CancelAfter(this._timeout);
}
else
{
disposeCts = false;
cts = this._pendingRequestsCts;
}
Task<HttpResponseMessage> sendTask;
try
{
sendTask = base.SendAsync(request, cts.Token);
}
catch
{
this.HandleFinishSendAsyncCleanup(cts, disposeCts);
throw;
}
return completionOption != HttpCompletionOption.ResponseContentRead || string.Equals(request.Method.Method, "HEAD", StringComparison.OrdinalIgnoreCase) ? this.FinishSendAsyncUnbuffered(sendTask, request, cts, disposeCts) : this.FinishSendAsyncBuffered(sendTask, request, cts, disposeCts);
}
private async Task<HttpResponseMessage> FinishSendAsyncBuffered(
Task<HttpResponseMessage> sendTask,
HttpRequestMessage request,
CancellationTokenSource cts,
bool disposeCts)
{
HttpClient httpClient = this;
HttpResponseMessage response = (HttpResponseMessage) null;
HttpResponseMessage httpResponseMessage;
try
{
response = await sendTask.ConfigureAwait(false);
if (response == null)
throw new InvalidOperationException(SR.net_http_handler_noresponse);
if (response.Content != null)
await response.Content.LoadIntoBufferAsync((long) httpClient._maxResponseContentBufferSize, cts.Token).ConfigureAwait(false);
if (NetEventSource.IsEnabled)
NetEventSource.ClientSendCompleted(httpClient, response, request);
httpResponseMessage = response;
}
catch (Exception ex)
{
response?.Dispose();
httpClient.HandleFinishSendAsyncError(ex, cts);
throw;
}
finally
{
httpClient.HandleFinishSendAsyncCleanup(cts, disposeCts);
}
return httpResponseMessage;
}
private async Task<HttpResponseMessage> FinishSendAsyncUnbuffered(
Task<HttpResponseMessage> sendTask,
HttpRequestMessage request,
CancellationTokenSource cts,
bool disposeCts)
{
HttpClient httpClient = this;
HttpResponseMessage httpResponseMessage;
try
{
HttpResponseMessage response = await sendTask.ConfigureAwait(false);
if (response == null)
throw new InvalidOperationException(SR.net_http_handler_noresponse);
if (NetEventSource.IsEnabled)
NetEventSource.ClientSendCompleted(httpClient, response, request);
httpResponseMessage = response;
}
catch (Exception ex)
{
httpClient.HandleFinishSendAsyncError(ex, cts);
throw;
}
finally
{
httpClient.HandleFinishSendAsyncCleanup(cts, disposeCts);
}
return httpResponseMessage;
}
private void HandleFinishSendAsyncError(Exception e, CancellationTokenSource cts)
{
if (NetEventSource.IsEnabled)
NetEventSource.Error((object) this, (object) e, nameof (HandleFinishSendAsyncError));
if (cts.IsCancellationRequested && e is HttpRequestException)
{
if (NetEventSource.IsEnabled)
NetEventSource.Error((object) this, (object) "Canceled", nameof (HandleFinishSendAsyncError));
throw new OperationCanceledException(cts.Token);
}
}
private void HandleFinishSendAsyncCleanup(CancellationTokenSource cts, bool disposeCts)
{
if (!disposeCts)
return;
cts.Dispose();
}
/// <summary>取消该实例所有挂起的请求。</summary>
public void CancelPendingRequests()
{
this.CheckDisposed();
if (NetEventSource.IsEnabled)
NetEventSource.Enter((object) this, (FormattableString) null, nameof (CancelPendingRequests));
CancellationTokenSource cancellationTokenSource = Interlocked.Exchange<CancellationTokenSource>(ref this._pendingRequestsCts, new CancellationTokenSource());
cancellationTokenSource.Cancel();
cancellationTokenSource.Dispose();
if (!NetEventSource.IsEnabled)
return;
NetEventSource.Exit((object) this, (FormattableString) null, nameof (CancelPendingRequests));
}
/// <summary>释放由 <see cref="T:System.Net.Http.HttpClient" /> 使用的非托管资源,并可根据需要释放托管资源。</summary>
/// <param name="disposing">如果释放托管资源和非托管资源,则为 <see langword="true" />;如果仅释放非托管资源,则为 <see langword="false" />。</param>
protected override void Dispose(bool disposing)
{
if (disposing && !this._disposed)
{
this._disposed = true;
this._pendingRequestsCts.Cancel();
this._pendingRequestsCts.Dispose();
}
base.Dispose(disposing);
}
private void SetOperationStarted()
{
if (this._operationStarted)
return;
this._operationStarted = true;
}
private void CheckDisposedOrStarted()
{
this.CheckDisposed();
if (this._operationStarted)
throw new InvalidOperationException(SR.net_http_operation_started);
}
private void CheckDisposed()
{
if (this._disposed)
throw new ObjectDisposedException(this.GetType().ToString());
}
private static void CheckRequestMessage(HttpRequestMessage request)
{
if (!request.MarkAsSent())
throw new InvalidOperationException(SR.net_http_client_request_already_sent);
}
private void PrepareRequestMessage(HttpRequestMessage request)
{
Uri uri = (Uri) null;
if (request.RequestUri == (Uri) null && this._baseAddress == (Uri) null)
throw new InvalidOperationException(SR.net_http_client_invalid_requesturi);
if (request.RequestUri == (Uri) null)
uri = this._baseAddress;
else if (!request.RequestUri.IsAbsoluteUri)
{
if (this._baseAddress == (Uri) null)
throw new InvalidOperationException(SR.net_http_client_invalid_requesturi);
uri = new Uri(this._baseAddress, request.RequestUri);
}
if (uri != (Uri) null)
request.RequestUri = uri;
if (this._defaultRequestHeaders == null)
return;
request.Headers.AddHeaders((HttpHeaders) this._defaultRequestHeaders);
}
private static void CheckBaseAddress(Uri baseAddress, string parameterName)
{
if (baseAddress == (Uri) null)
return;
if (!baseAddress.IsAbsoluteUri)
throw new ArgumentException(SR.net_http_client_absolute_baseaddress_required, parameterName);
if (!HttpUtilities.IsHttpUri(baseAddress))
throw new ArgumentException(SR.net_http_client_http_baseaddress_required, parameterName);
}
private Uri CreateUri(string uri)
{
return !string.IsNullOrEmpty(uri) ? new Uri(uri, UriKind.RelativeOrAbsolute) : (Uri) null;
}
private HttpRequestMessage CreateRequestMessage(HttpMethod method, Uri uri)
{
return new HttpRequestMessage(method, uri)
{
Version = this._defaultRequestVersion
};
}
}
}