Xamarin iOS将内容长度头添加到HttpClient引发错误
我正在尝试使用HttpClient通过Xamarin.iOS中的REST api将文件上载到Microsoft Azure Blob存储。直到现在一切都很顺利。每次尝试向客户端添加内容长度标题时,都会出现以下错误:Xamarin iOS将内容长度头添加到HttpClient引发错误,ios,xamarin,httpclient,azure-storage-blobs,content-length,Ios,Xamarin,Httpclient,Azure Storage Blobs,Content Length,我正在尝试使用HttpClient通过Xamarin.iOS中的REST api将文件上载到Microsoft Azure Blob存储。直到现在一切都很顺利。每次尝试向客户端添加内容长度标题时,都会出现以下错误: System.InvalidOperationException: Content-Length\n at System.Net.Http.Headers.HttpHeaders.CheckName (System.String name) [0x0005f] in /Develo
System.InvalidOperationException: Content-Length\n at System.Net.Http.Headers.HttpHeaders.CheckName (System.String name) [0x0005f] in /Developer/MonoTouch/Source/mono/mcs/class/System.Net.Http/System.Net.Http.Headers/HttpHeaders.cs:253 \n at System.Net.Http.Headers.HttpHeaders.Add (System.String name, IEnumerable`1 values) [0x00011] in /Developer/MonoTouch/Source/mono/mcs/class/System.Net.Http/System.Net.Http.Headers/HttpHeaders.cs:171 \n at System.Net.Http.Headers.HttpHeaders.Add (System.String name, System.String value) [0x00000] in /Developer/MonoTouch/Source/mono/mcs/class/System.Net.Http/System.Net.Http.Headers/HttpHeaders.cs:163
这是我创建HttpClient的代码
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Add("Content-Length", blobLength.ToString()); // Error here
client.DefaultRequestHeaders.Add("x-ms-date", dateInRfc1123Format);
client.DefaultRequestHeaders.Add("x-ms-version", msVersion);
Debug.WriteLine("Added all headers except Authorization");
client.DefaultRequestHeaders.Add("Authorization", authorizationHeader);
Debug.WriteLine("Added Authorization header");
//logRequest(requestContent, uri);
Debug.WriteLine("created new http client");
HttpContent requestContent = new ByteArrayContent(blobckContent);
HttpResponseMessage response = await client.PutAsync(uri, requestContent);
我尝试在没有验证的情况下使用tryadd,而不是添加:
client.DefaultRequestHeaders.TryAddWithoutValidation("Content-Length", blobLength.ToString());
不会抛出错误,但仍不会添加标头。
任何帮助都很好。以下是CheckName的内部工作原理,它将引发异常。您可以在此处找到来源: 查看完整的源文件后: 内容长度似乎在已知的_头的集合中 此外,内容长度标题值的内部类型看起来也是long。但是Add方法只接受一个字符串作为值,get被解析为long。为内容长度值传递的字符串值是否有效
HeaderInfo CheckName (string name)
{
if (string.IsNullOrEmpty (name))
throw new ArgumentException ("name");
Parser.Token.Check (name);
HeaderInfo headerInfo;
if (known_headers.TryGetValue (name, out headerInfo) && (headerInfo.HeaderKind & HeaderKind) == 0) {
if (HeaderKind != HttpHeaderKind.None && ((HeaderKind | headerInfo.HeaderKind) & HttpHeaderKind.Content) != 0)
throw new InvalidOperationException (name);
return null;
}
return headerInfo;
}