使用 HttpWebRequest 将参数传递给 json Web 服务
我在将参数传递给 Web 服务时遇到问题,除了 JSON
中的 POST
数据。我为此使用 HttpWebRequest
,以下是我迄今为止尝试过的代码,但每次服务器返回以下两个错误中的任何一个:
错误 1:
{"command":null,"handle":null,"code":2003,"msg":"Required parameter missing","error":["Parameter 'login_handle' missing.","Parameter 'login_pass' missing."],"params":{"0":{"Key":"login_handle","Value":"test"},"1":{"Key":"login_pass","Value":"test"},"handle":"example.com"},"svTRID":null,"response":[]}
错误 2:
{"command":null,"handle":null,"code":2400,"msg":"Command failed","error":["Internal Server Error. resulted in the following error: array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object"],"params":[],"svTRID":null,"response":[],"children":[{"command":"Internal Server Error.","handle":null,"code":2400,"msg":"Command failed","error":["array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object"],"params":{"errno":2,"errstr":"array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object","errfile":"\/home\/ote\/httpapi\/v1\/index.php","errline":54},"svTRID":null,"response":[]}]}
这是代码:
try
{
ASCIIEncoding encoding = new ASCIIEncoding();
Dictionary<string, string> data = new Dictionary<string, string>();
data["login_handle"] = "test";
data["login_pass"] = "test";
System.Net.WebRequest webReq = System.Net.WebRequest.Create(url);
webReq.Method = "POST";
webReq.ContentType = "application/json; charset=utf-8";
DataContractJsonSerializer ser = new DataContractJsonSerializer(data.GetType());
MemoryStream ms = new MemoryStream();
ser.WriteObject(ms, data);
String json = Encoding.UTF8.GetString(ms.ToArray());
StreamWriter writer = new StreamWriter(webReq.GetRequestStream());
writer.Write(json);
writer.Close();
System.Net.WebResponse webResp = webReq.GetResponse();
System.IO.StreamReader sr = new System.IO.StreamReader(webResp.GetResponseStream());
string s = sr.ReadToEnd().Trim();
}
catch (Exception ex)
{
string e = ex.Message;
}
如果我使用 string data = "[login_handle:'username',login_pass:'password']";
而不是 Dictionary
I am having a problem in passing parameters to webservice which except POST
data in JSON
. I am using HttpWebRequest
for this, following is the code i have tried so far, but everytime server returns any of these two errors:
Error 1:
{"command":null,"handle":null,"code":2003,"msg":"Required parameter missing","error":["Parameter 'login_handle' missing.","Parameter 'login_pass' missing."],"params":{"0":{"Key":"login_handle","Value":"test"},"1":{"Key":"login_pass","Value":"test"},"handle":"example.com"},"svTRID":null,"response":[]}
Error 2:
{"command":null,"handle":null,"code":2400,"msg":"Command failed","error":["Internal Server Error. resulted in the following error: array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object"],"params":[],"svTRID":null,"response":[],"children":[{"command":"Internal Server Error.","handle":null,"code":2400,"msg":"Command failed","error":["array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object"],"params":{"errno":2,"errstr":"array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object","errfile":"\/home\/ote\/httpapi\/v1\/index.php","errline":54},"svTRID":null,"response":[]}]}
Here is the code:
try
{
ASCIIEncoding encoding = new ASCIIEncoding();
Dictionary<string, string> data = new Dictionary<string, string>();
data["login_handle"] = "test";
data["login_pass"] = "test";
System.Net.WebRequest webReq = System.Net.WebRequest.Create(url);
webReq.Method = "POST";
webReq.ContentType = "application/json; charset=utf-8";
DataContractJsonSerializer ser = new DataContractJsonSerializer(data.GetType());
MemoryStream ms = new MemoryStream();
ser.WriteObject(ms, data);
String json = Encoding.UTF8.GetString(ms.ToArray());
StreamWriter writer = new StreamWriter(webReq.GetRequestStream());
writer.Write(json);
writer.Close();
System.Net.WebResponse webResp = webReq.GetResponse();
System.IO.StreamReader sr = new System.IO.StreamReader(webResp.GetResponseStream());
string s = sr.ReadToEnd().Trim();
}
catch (Exception ex)
{
string e = ex.Message;
}
If i use string data = "[login_handle:'username',login_pass:'password']";
instead of Dictionary<string, string>
, i receive error number 2.
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没关系,我自己解决了这个问题,而不是使用字典类型,我使用了这样的匿名类型
var data = new { login_handle = "test", login_pass = "test" };
它解决了我的问题。Never mind, i solved it myself, instead of using Dictionary type i used anonymous type like this
var data = new { login_handle = "test", login_pass = "test" };
and it solved my problem.您应该做的是创建一个 DataContract 类(我们将称为 JsonData),它有两个名为 login_handle 和 login_pass 的 DataMember。
然后,在 DataContractJsonSerializer 中,将 typeof(JsonData) 传递给构造函数。
此解决方案是最好的,因为您无法使用匿名类型创建复杂类型。此外,通过设置 DataContracts 的父级,您可以轻松创建复杂的 JSON。
What you should have done is create a DataContract class (we'll call JsonData) which has two DataMembers named login_handle and login_pass.
Then, in the DataContractJsonSerializer, pass typeof(JsonData) to the constructor.
This solution is the best because you cannot create complex types using an anonymous type. Also, by parenting your DataContracts you can easily create complex JSON.