我会很感激一些帮助，因为我对 C# 真的很陌生。我需要返回响应标头，实际上我只需要 3 个状态码。Web 服务的页面代码是 `
<%@ Page Language="C#" ContentType="application/json;charset=utf-8"%>
<%@ Import Namespace="System.Net" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Xml" %>
<%@ Import Namespace="System.Web" %>
<%@ Import Namespace="Newtonsoft.Json" %>
<%@ Import Namespace="Newtonsoft.Json.Linq" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="log4net" %>
<script runat="server">
static readonly ILog m_Log = LogManager.GetLogger("getWebRequest");
String appUrlEncoded = "application/x-www-form-urlencoded";
String appJson = "application/json";
String textXml = "text/xml";
String appXml = "application/xml";
String textPlain = "text/plain";
/************************ fetchURL *******************/
String fetchURL(string url, string protocol, string enctype, string parameters,
string readWriteTimeout, string conTimeout,
string userName, string password, JObject CustomHeaders, JToken JsonContent)
{
m_Log.Debug("fetchURL(" + url + ", " + protocol + ", " + enctype + ", " + parameters + ", " +
readWriteTimeout + ", " + conTimeout + ", " + userName + ", " + password + ") in");
String result = "";
String method ="GET";
String loginCredentials = userName + ":" + password;
// Accepting self-signed certificates
ServicePointManager.ServerCertificateValidationCallback += delegate(
object
sender,
System.Security.Cryptography.X509Certificates.X509Certificate
pCertificate,
System.Security.Cryptography.X509Certificates.X509Chain pChain,
System.Net.Security.SslPolicyErrors pSSLPolicyErrors)
{
return true;
};
try
{
if (protocol.EndsWith("get") || protocol.EndsWith("delete"))
{
url = url + (String.IsNullOrEmpty(parameters) ? "" : ("?" + parameters));
}
method = protocol.ToUpper();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = method;
request.ContentType = enctype;
request.Timeout = Int32.Parse(conTimeout);
request.ReadWriteTimeout = Int32.Parse(readWriteTimeout);
if (loginCredentials.Length>1)
{
request.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(new ASCIIEncoding().GetBytes(loginCredentials)));
}
if (CustomHeaders != null)
{
//Custom HTTP headers
JEnumerable<JProperty> children = CustomHeaders.Children<JProperty>();
foreach (JProperty child in children)
{
string strKey = child.Name;
string strValue = "";
if (child == null || child.Value == null)
continue;
if (child.Value.Type.Equals(JsonTokenType.String))
{
strValue = (String)((JValue)child.Value).Value;
}
else
{
strValue = child.Value.ToString();
}
m_Log.Debug("request key: '" + strKey + "' -- value: '" + strValue + "'");
if (strKey.Trim().Equals("Accept"))
{
request.Accept = strValue;
}
else if (strKey.Trim().Equals("Connection"))
{
request.Connection = strValue;
}
else if (strKey.Trim().Equals("Content-Length"))
{
request.ContentLength = strValue.Length;
}
else if (strKey.Trim().Equals("Content-Type"))
{
request.ContentType = strValue;
}
else if (strKey.Trim().Equals("Expect"))
{
request.Expect = strValue;
}
else if (strKey.Trim().Equals("If-Modified-Since"))
{
request.IfModifiedSince = DateTime.Parse(strValue);
}
else if (strKey.Trim().Equals("Referer"))
{
request.Referer = strValue;
}
else if (strKey.Trim().Equals("Transfer-Encoding"))
{
request.TransferEncoding = strValue;
}
else if (strKey.Trim().Equals("User-Agent"))
{
request.UserAgent = strValue;
}
else
{
request.Headers.Add(strKey, strValue);
}
}
}
if (method.Equals("POST") || method.Equals("PUT"))
{
using (Stream writeStream = request.GetRequestStream())
{
UTF8Encoding encoding = new UTF8Encoding();
if (enctype.Equals(appJson))
{
if (JsonContent != null)
{
if (JsonContent is JObject)
{
JObject obj = (JObject)JsonContent;
m_Log.Debug(enctype + " encoding JObject: " + obj.ToString());
byte[] bytes = encoding.GetBytes(obj.ToString());
writeStream.Write(bytes, 0, bytes.Length);
}
else
{
JObject obj = new JObject();
obj.Add(new JProperty("content", JsonContent));
m_Log.Debug(enctype + " encoding: " + obj.ToString());
byte[] bytes = encoding.GetBytes(obj.ToString());
writeStream.Write(bytes, 0, bytes.Length);
}
}
}
else if (enctype.Equals(appUrlEncoded))
{
m_Log.Debug(enctype + " encoding parameters: " + parameters);
byte[] bytes = encoding.GetBytes(parameters);
writeStream.Write(bytes, 0, bytes.Length);
}
writeStream.Close();
}
}
HttpWebResponse webResponse = (HttpWebResponse)request.GetResponse();
StreamReader input = new StreamReader(webResponse.GetResponseStream());
result = "";
result += convertToJson(input, webResponse.ContentType);
}
catch (Exception e)
{
Dictionary<string, string> d1 = new Dictionary<string, string>();
string value = "error.com.genesyslab.composer.servererror message= " + e.Message.ToString();
d1.Add("errorMsg", value);
result = Newtonsoft.Json.JavaScriptConvert.SerializeObject(d1);
Response.AppendToLog("GeneralException:" + result);
}
m_Log.Debug("result: " + result);
m_Log.Debug("fetchURL() out");
return result;
}
string parseResultData(StreamReader reader, JsonTextReader jsonReader, string initialData)
{
m_Log.Debug("parseResultData(" + initialData + ") In");
string json = "";
try
{
jsonReader.Read();
// JSON string
json += initialData;
Response.AppendToLog("ContentTypeUnkJSON");
m_Log.Debug("parseResultData() Out");
return json;
}
catch (JsonReaderException)
{
m_Log.Debug("parseResultData() JsonReaderException");
// not a valid JSON - check for XML
try
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(initialData);
reader.Close();
json = Newtonsoft.Json.JavaScriptConvert.SerializeXmlNode(doc.DocumentElement);
Response.AppendToLog("ContentTypeUnkXML");
m_Log.Debug("parseResultData() Out");
return json;
}
catch (Exception e)
{
m_Log.Debug("parseResultData() Exception: " + e.Message);
Response.AppendToLog("ContentTypeUnkTEXT");
Response.AppendToLog("Exception Occured: " +e.Message.ToString());
Dictionary<string, string> d1 = new Dictionary<string, string>();
d1.Add("result", initialData);
string jsonText = Newtonsoft.Json.JavaScriptConvert.SerializeObject(d1);
return jsonText;
}
}
}
/**************convertToJson****************************/
string convertToJson(StreamReader reader, string contentType)
{
m_Log.Debug("convertToJson(" + contentType + ") In");
string json = "";
string data = reader.ReadToEnd();
// Parse into a JSON string
TextReader txReader = new StringReader(data);
Newtonsoft.Json.JsonTextReader jsonReader = new JsonTextReader(txReader);
if (contentType != null && contentType.Length != 0)
{
Response.AppendToLog("Content-Type:" + contentType.ToString());
if (contentType.ToLower().StartsWith(textXml) ||
contentType.ToLower().StartsWith(appXml))
{
try
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(data);
reader.Close();
json = Newtonsoft.Json.JavaScriptConvert.SerializeXmlNode(doc.DocumentElement);
m_Log.Debug("convertToJson() Out");
return json;
}
catch (XmlException e)
{
Response.AppendToLog("ContentTypeXMLFalse");
m_Log.Error("convertToJson() Error in decoding XML: " + e.Message);
throw new XmlException("Error in decoding XML: " + e.Message, e);
}
}
else if (contentType.ToLower().StartsWith(appJson))
{
jsonReader.Read();
// JSON string
json += data;
Response.AppendToLog("ContentTypeJSON");
m_Log.Debug("convertToJson() ContentTypeJSON Out");
return json;
}
else if (contentType.ToLower().StartsWith(textPlain))
{
Response.AppendToLog("ContentTypeTEXT");
Dictionary<string, string> d1 = new Dictionary<string, string>();
d1.Add("result", data);
d1.Add("headers", "");
string jsonText = Newtonsoft.Json.JavaScriptConvert.SerializeObject(d1);
Response.AppendToLog("ContentTypeTEXT:" + jsonText);
m_Log.Debug("convertToJson() ContentTypeTEXT Out");
return jsonText;
}
else
{
Response.AppendToLog("unknown Content-Type:" + contentType);
m_Log.Debug("convertToJson() unknown Content-Type Out");
return (parseResultData(reader, jsonReader, data));
}
}
else
{
Response.AppendToLog("Content-Type NULL");
m_Log.Debug("convertToJson() Content-Type NULL");
return( parseResultData(reader, jsonReader, data) );
}
}
</script>
<%
log4net.Config.XmlConfigurator.Configure();
m_Log.Debug("_________________________________________________");
m_Log.Debug("getWebRequest() In");
// extract parameters
String WebUrl ="";
String Protocol= "";
String EncType = "";
Boolean AuthenAccess = false;
String UserName ="";
String Password ="";
String readWriteTimeout = "20000"; // timeout in milliseconds
String conTimeout = "20000"; // timeout in milliseconds
Stream ins = HttpContext.Current.Request.InputStream;
StreamReader reader = new StreamReader(ins);
string jsonStr = reader.ReadToEnd();
JObject requestObj = JObject.Parse(jsonStr);
m_Log.Debug("requestObj: " + requestObj.ToString());
WebUrl = (string)requestObj["WebUrl"];
Protocol = (string)requestObj["Protocol"];
EncType = (string)requestObj["Enctype"];
AuthenAccess = (Boolean)requestObj["AuthenAccess"];
if (AuthenAccess)
{
UserName = (string)requestObj["UserName"];
Password = (string)requestObj["Password"];
}
// the value passed from the block property overrides the
// global value in the composer.properties
String timeout = (string)requestObj["Timeout"];
if (timeout != null && timeout.Trim().Length > 0)
{
try
{
int timeoutInt = Int32.Parse(timeout);
if (timeoutInt != -1)
{
conTimeout = Convert.ToString(timeoutInt * 1000);
readWriteTimeout = Convert.ToString(timeoutInt * 1000);
}
}
catch (FormatException)
{
// ignore an invalid value
}
}
String ParamStr = "";
int QueryPos = WebUrl.IndexOf('?');
if ((Protocol.EndsWith("get") || Protocol.EndsWith("delete")) && (QueryPos > 0))
{
String QueryString = WebUrl.Substring(QueryPos + 1, WebUrl.Length - (QueryPos + 1));
WebUrl = WebUrl.Substring(0, QueryPos);
String[] Pairs = QueryString.Split('&');
foreach (String Pair in Pairs)
{
string strKey = "";
string strValue = "";
int Pos = Pair.IndexOf('=');
if (Pos == -1)
{
strKey = Pair;
strValue = null;
}
else
{
try
{
strKey = Server.UrlDecode(Pair.Substring(0, Pos));
strValue = Server.UrlDecode(Pair.Substring(Pos + 1, Pair.Length - (Pos + 1)));
}
catch (Exception ex)
{
m_Log.Error("Exception parsing queryString:" + ex.Message);
}
}
if (!ParamStr.Equals(""))
{
ParamStr = ParamStr + "&";
}
ParamStr = ParamStr + Server.UrlEncode(strKey) + "=" + Server.UrlEncode(strValue);
}
}
JObject Parameters = (JObject)requestObj["Parameters"];
if (Parameters != null)
{
JEnumerable<JProperty> children = Parameters.Children<JProperty>();
foreach (JProperty child in children)
{
string strKey = child.Name;
string strValue = "";
if (child == null || child.Value == null)
continue;
if (child.Value.Type.Equals(JsonTokenType.String))
{
strValue = (String)((JValue)child.Value).Value;
}
else
{
strValue = child.Value.ToString();
}
// add to map
if (!ParamStr.Equals(""))
{
ParamStr = ParamStr + "&";
}
ParamStr = ParamStr + Server.UrlEncode(strKey) + "=" + Server.UrlEncode(strValue);
}
}
m_Log.Debug("ParamStr: " + ParamStr);
JObject CustomHeaders = (JObject)requestObj["CustomHeaders"];
JToken JsonContent = (JToken)requestObj["JsonContent"];
//relative path processing
string relativePath = "http://localhost:";
if (WebUrl.StartsWith("."))
{
int slashindex = WebUrl.IndexOf("/");
if (slashindex != -1)
{
int n = WebUrl.Length;
WebUrl = WebUrl.Substring(slashindex + 1, n - slashindex-1);
}
relativePath += HttpContext.Current.Request.ServerVariables["SERVER_PORT"];
relativePath = relativePath + HttpContext.Current.Request.RawUrl.ToString();
int boundary = relativePath.IndexOf("include");
if(boundary !=-1){
relativePath = relativePath.Substring(0, boundary);
}
WebUrl = relativePath + WebUrl;
m_Log.Debug("urlStr: " + WebUrl);
}
m_Log.Debug("WebUrl: " + WebUrl);
if (WebUrl.Length > 0)
{
Response.Write(fetchURL(WebUrl, Protocol, EncType, ParamStr, readWriteTimeout, conTimeout,
UserName, Password, CustomHeaders, JsonContent));
}
m_Log.Debug("getWebRequest() Out");
%>
` 如您所见，我在返回的 json 响应中插入了一个“标题”键值对。如何在 headers 属性中附加响应标头的值？我试过 webResponse.Headers 没有运气。非常感谢您！