/// <summary>
/// 获取请求的数据
/// </summary>
/// <param name="strUrl">请求地址</param>
/// <param name="requestMode">请求方式</param>
/// <param name="parameters">参数</param>
/// <param name="requestCoding">请求编码</param>
/// <param name="responseCoding">响应编码</param>
/// <param name="timeout">请求超时时间（毫秒）</param>
/// <returns>返回：请求成功响应信息，失败返回null</returns>
public string GetResponseString(string strUrl, ERequestMode requestMode, Dictionary <string, string> parameters, Encoding requestCoding, Encoding responseCoding, out string error, int timeout = 300)
{
error = "";
string url = VerifyUrl(strUrl);
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(new Uri(url));
HttpWebResponse webResponse = null;
switch (requestMode)
{
case ERequestMode.Get:
webResponse = GetRequest(webRequest, out error, timeout);
break;
case ERequestMode.Post:
webResponse = PostRequest(webRequest, parameters, requestCoding, out error, timeout);
break;
}
if (webResponse != null && webResponse.StatusCode == HttpStatusCode.OK)
{
using (Stream newStream = webResponse.GetResponseStream()) {
if (newStream != null)
{
using (StreamReader reader = new StreamReader(newStream, responseCoding)) {
string result = reader.ReadToEnd();
return(result);
}
}
}
}
return(null);
}
public ParamUtm(HttpRequest request) : base(request)
{
// parse style
if (request["style"] == null)
{
throw new Exception("Param: style is missing");
}
string modeStr = request["style"].ToLower();
if (modeStr.StartsWith("bt"))
{
mode = ERequestMode.SingleTile;
}
else if (modeStr.StartsWith("dt"))
{
mode = ERequestMode.MultiTiles;
}
else if (modeStr.StartsWith("so"))
{
mode = ERequestMode.OriginList;
}
else if (modeStr.StartsWith("ts"))
{
mode = ERequestMode.TimeSeriesList;
}
else
{
throw new Exception("Param: unknown style: " + modeStr + " request:" + request.Url.Query);
}
// parse layerType
if (request["LayerType"] != null)
{
string layerTypeString = request["LayerType"].ToLower();
if (layerTypeString == "fmap")
{
layerType = ELayerType.FMap;
}
else if (layerTypeString == "mapnik")
{
layerType = ELayerType.Mapnik;
}
else
{
throw new Exception("Param: unknown LayerType: " + layerTypeString + " request:" + request.Url.Query);
}
}
////////////// parse common params used by all modes //////////////
// required
zone = GetIntParam("utmz1");
res = GetDoubleParam("res");
// optional
if (request["source"] != null)
{
originName = request["source"].ToUpper();
}
if (request["jcq"] != null)
{
jpegQuality = GetIntParam("jcq");
}
// optional
overlay = request["overlay"];
if (overlay == null)
{
overlay = request["composite"];
}
////////////// parse different params for different modes //////////////
// xn and yn are for SingleTile mode
if (mode == ERequestMode.SingleTile)
{
tilexy.x = GetUIntParam("xn");
xn = tilexy.x;
tilexy.y = GetUIntParam("yn");
yn = tilexy.y;
tilexy.y = ProjectionUtm.Transform_YnOld_YnNew(tilexy.y, res);
tilexy.level = ProjectionUtm.ResToLevel(res);
}
// x1 y1 x2 y2 are not for single tile request
if (mode != ERequestMode.SingleTile)
{
utmxy1.x = GetDoubleParam("x1");
utmxy1.y = GetDoubleParam("y1");
utmxy1.res = res;
utmxy2.x = GetDoubleParam("x2");
utmxy2.y = GetDoubleParam("y2");
utmxy2.res = res;
utmxy = utmxy1;
}
date = 0;
if (request["QFSOURCE_IMAGE_DATE"] != null)
{
Int32.TryParse(request["QFSOURCE_IMAGE_DATE"], out date);
}
}