无法使用 Android 客户端 POST 到 WCF 服务
我有一个正在运行的自托管 WCF Web 服务和一个 Android 客户端应用程序。我能够以 json 格式从 Web 服务获取或检索数据,但是无法向服务器 POST 或发送任何数据。
下面是来自 WCF 服务的代码:
[OperationContract]
[WebInvoke(Method = "POST",
UriTemplate = "/SetValue",
RequestFormat = WebMessageFormat.Json,
ResponseFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Wrapped)]
public string SetValue(TestClass someValue)
{
return someValue.Something.ToString();
}
[DataContract]
public class TestClass
{
[DataMember(Name = "something")]
public int Something
{
get;
set;
}
}
下面是来自 Android 客户端的代码:
HttpClient httpClient = new DefaultHttpClient();
HttpPost request = new HttpPost("http://xxx.xxx.x.x:8000/SetValue");
List<NameValuePair> params = new ArrayList<NameValuePair>(1);
params.add(new BasicNameValuePair("something", "12345"));
request.setEntity(new UrlEncodedFormEntity(params));
HttpResponse response = httpClient.execute(request);
以下是我启动自托管服务的方式:
class Program
{
static void Main()
{
Uri baseAddress = new Uri("http://localhost:8000/");
using (WebServiceHost host = new WebServiceHost(typeof(ServerSideProfileService), baseAddress))
{
host.AddServiceEndpoint(typeof(ServerSideProfileService), new BasicHttpBinding(), "Soap");
ServiceEndpoint endpoint = host.AddServiceEndpoint(typeof(ServerSideProfileService), new WebHttpBinding(), "Web");
endpoint.Behaviors.Add(new WebHttpBehavior());
// Open the service host, service is now listening
host.Open();
}
}
}
我只有一个 app.config,其中包含:
<?xml version="1.0"?>
<configuration>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
我运行时收到的响应来自 Android 客户端的 httpClient.execute(request) 包括:
HTTP/1.1 400 Bad Request
Request Error
The server encountered an error processing the request. See server logs for more details.
差不多就是这样了。我对 WCF 很陌生,不知道这个“服务器日志”在哪里,并且不知道如何解决或调试这个问题? (我尝试过 Fiddler2,但它似乎没有检测到来自 Android 客户端的任何内容。)
[编辑]
我也尝试过,
JSONObject json = new JSONObject();
json.put("something", "12345");
StringEntity entity = new StringEntity(json.toString());
entity.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
entity.setContentType( new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
request.setEntity(entity);
这也会导致错误。
我还注意到,如果我更改“SetValue”以返回一个常量,例如“abcd”,而不是 someValue.Something.ToString(),那么一切正常吗?
I have a self-hosted WCF web service running, and an Android client application. I am able to GET or retrieve data from the web service in json format, however I am unable to POST or send any data to the server.
Below is the code from the WCF service:
[OperationContract]
[WebInvoke(Method = "POST",
UriTemplate = "/SetValue",
RequestFormat = WebMessageFormat.Json,
ResponseFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Wrapped)]
public string SetValue(TestClass someValue)
{
return someValue.Something.ToString();
}
[DataContract]
public class TestClass
{
[DataMember(Name = "something")]
public int Something
{
get;
set;
}
}
Below is the code from the Android client:
HttpClient httpClient = new DefaultHttpClient();
HttpPost request = new HttpPost("http://xxx.xxx.x.x:8000/SetValue");
List<NameValuePair> params = new ArrayList<NameValuePair>(1);
params.add(new BasicNameValuePair("something", "12345"));
request.setEntity(new UrlEncodedFormEntity(params));
HttpResponse response = httpClient.execute(request);
The following is how I start the self-hosted service:
class Program
{
static void Main()
{
Uri baseAddress = new Uri("http://localhost:8000/");
using (WebServiceHost host = new WebServiceHost(typeof(ServerSideProfileService), baseAddress))
{
host.AddServiceEndpoint(typeof(ServerSideProfileService), new BasicHttpBinding(), "Soap");
ServiceEndpoint endpoint = host.AddServiceEndpoint(typeof(ServerSideProfileService), new WebHttpBinding(), "Web");
endpoint.Behaviors.Add(new WebHttpBehavior());
// Open the service host, service is now listening
host.Open();
}
}
}
I only have an app.config which just has:
<?xml version="1.0"?>
<configuration>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
The response I'm getting when I run httpClient.execute(request) from the Android client includes:
HTTP/1.1 400 Bad Request
Request Error
The server encountered an error processing the request. See server logs for more details.
And that's pretty much it. I am very new to WCF and don't know where this 'server log' would be, and am at a loss as to how to troubleshoot or debug this? (I have tried Fiddler2 but it doesn't seem to detect anything from the Android client.)
[EDIT]
I have also tried
JSONObject json = new JSONObject();
json.put("something", "12345");
StringEntity entity = new StringEntity(json.toString());
entity.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
entity.setContentType( new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
request.setEntity(entity);
which also results in the error.
I also noticed that if I change 'SetValue' to return a constant, such as "abcd", instead of someValue.Something.ToString(), then everything works?
如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱,如果其他用户或者作者回复了您的评论,将不能在第一时间通知您!
发布评论
评论(4)
您的客户端代码正在发送 html 表单 post 格式的有效负载,但您的服务器需要 json 有效负载,您需要客户端类似于
Your client code is sending a html form post formatted payload, but your server is expecting a json payload, you need the client to be something like
我遇到了同样的问题,我通过
从 WCF 方法标头中
删除
解决了这个问题更改为
I had the same problem, I resolved this by removing
from my WCF method header
Changed to
superfell那个正解!
superfell 那个正解!
据我所知,Android 将 JSON 字符串转换为字节数组流,然后发布它。这是我自己的代码作为示例
在 eclipse 中,当在倒数第二行设置断点并检查 httpPost 对象属性时,我发现 StringEntity 的值不是字节数组 [123. 43, 234 ......即使我已经确认我的字符串 sJSONOut 是正确格式化的 json。
这里的另一个答案建议从 WCF 方法标头中删除 BodyStyle = WebMessageBodyStyle.WrappedRequest 。这给了我线索,我需要将该行从 WrappedRequest 更改为 Bare,这就是最终的工作。
BodyStyle = WebMessageBodyStyle.Bare
From what I have found Android converts the JSON string to a byte array stream and then posts it. Here is my own code as an example
In eclipse, when setting a break point on the second to last line and inspecting the httpPost object properties i find the value of my StringEntity is not a byte array [123. 43, 234 ...... even though I have confirmed that my string sJSONOut is correctly formatted json.
Another answer here suggested removing BodyStyle = WebMessageBodyStyle.WrappedRequest from the WCF method header. That gave me the clue I needed to change that line from WrappedRequest to Bare which is what ended up working.
BodyStyle = WebMessageBodyStyle.Bare