/// <summary>获取类型文件的缓存时间</summary>
public static int GetCacheDuration(this Type type)
{
ScriptAttribute attr = ReflectHelper.GetScriptAttribute(type);
return((attr != null) ? attr.CacheDuration : 0);
}
//----------------------------------------------
// 入口
//----------------------------------------------
/// <summary>处理 Web 方法调用请求</summary>
public static void ProcessRequest(HttpContext context, object handler)
{
// 解析类型、方法、参数等信息
// 对于aspx页面，执行时编译出来的是类似ASP.xxx_aspx的类，这不是我们想要处理的类，追溯处理父类(IMPORTANT!)
var decoder = RequestDecoder.CreateInstance(context);
var args = decoder.ParseArguments();
var type = handler.GetType();
if (type.FullName.StartsWith("ASP.") && type.BaseType != null)
{
type = type.BaseType;
}
var methodName = decoder.MethodName;
var method = ReflectHelper.GetMethod(type, methodName);
var attr = ReflectHelper.GetHttpApiAttribute(method);
// 处理预留方法
if (ProcessReservedMethod(context, type, methodName, args))
{
return;
}
// 普通方法调用
try
{
// 检测方法可用性
CheckMethod(context, method, attr, args);
// 获取需要的参数
var parameters = ReflectHelper.GetParameters(method, args);
var p = SerializeHelper.ToJson(parameters).ClearSpace().TrimStart('[').TrimEnd(']'); //.Replace("\"", "");
var cacheKey = string.Format("{0}-{1}-{2}", handler, method.Name, p); // 可考虑用 MD5 做缓存健名
var expireDt = DateTime.Now.AddSeconds(attr.CacheSeconds);
// 获取方法调用结果并依情况缓存
object result;
if (attr.CacheSeconds == 0)
{
result = method.Invoke(handler, parameters);
}
else
{
result = CacheHelper.GetCachedObject <object>(
cacheKey, expireDt,
() => { return(method.Invoke(handler, parameters)); }
);
}
// 输出结果
ResponseType dataType = attr.Type;
if (args.ContainsKey("_type"))
{
dataType = (ResponseType)Enum.Parse(typeof(ResponseType), args["_type"].ToString(), true);
}
if (dataType == ResponseType.Auto && result != null)
{
dataType = ParseDataType(result.GetType());
}
var wrap = HttpApiConfig.Instance.Wrap ?? attr.Wrap;
var wrapInfo = attr.WrapCondition;
WriteResult(context, result, dataType, attr.MimeType, attr.FileName, attr.CacheSeconds, attr.CacheLocation, wrap, wrapInfo);
}
catch (Exception ex)
{
if (ex is HttpApiException)
{
var err = ex as HttpApiException;
WriteError(context, err.Code, err.Message);
}
else
{
var info = (ex.InnerException != null) ? ex.InnerException.Message : ex.Message;
WriteError(context, 400, info);
}
HttpApiConfig.Instance.DoException(method, ex);
}
finally
{
HttpApiConfig.Instance.DoEnd(context);
}
}
/// <summary>访问对象</summary>
private void VisitObject(StringBuilder sb, object obj, string name)
{
if (this.FormatLowCamel)
{
name = name?.ToLowCamel();
}
// 对象为空处理
if (obj == null)
{
if (!name.IsNullOrEmpty())
{
sb.AppendFormat("<{0}/>", name);
}
return;
}
// 正常处理
var type = obj.GetType();
if (type.IsNullable())
{
type = type.GetNullableDataType();
}
if (name.IsNullOrEmpty())
{
name = GetNodeName(type);
}
// 根据类型进行输出（还要判断可空类型）
sb.AppendFormat("<{0}>", name);
if (obj is string)
{
sb.Append(GetXmlSafeText(obj));
}
else if (obj is DateTime)
{
var dt = Convert.ToDateTime(obj);
if (dt != new DateTime())
{
sb.AppendFormat(dt.ToString(this.FormatDateTime));
}
}
else if (type.IsEnum)
{
if (this.FormatEnum == EnumFomatting.Int)
{
sb.AppendFormat("{0:d}", obj);
}
else
{
sb.AppendFormat("{0}", obj);
}
}
else if (obj is DataTable)
{
var table = obj as DataTable;
var cols = table.Columns;
foreach (DataRow row in table.Rows)
{
sb.AppendFormat("<Row>");
foreach (DataColumn col in cols)
{
var columnName = col.ColumnName;
VisitObject(sb, row[columnName], columnName);
}
sb.AppendFormat("</Row>");
}
}
else if (obj is IDictionary)
{
var dict = (obj as IDictionary);
foreach (var key in dict.Keys)
{
sb.AppendFormat("<Item Key=\"{0}\">", key);
VisitObject(sb, dict[key], "");
sb.AppendFormat("</Item>");
}
}
else if (obj is IEnumerable)
{
foreach (var item in (obj as IEnumerable))
{
VisitObject(sb, item, "");
}
}
else if (type.IsValueType)
{
sb.AppendFormat("{0}", obj);
}
else
{
var properties = obj.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (var property in properties)
{
if (ReflectHelper.GetAttribute <NonSerializedAttribute>(property) != null ||
ReflectHelper.GetAttribute <JsonIgnoreAttribute>(property) != null ||
ReflectHelper.GetAttribute <System.Xml.Serialization.XmlIgnoreAttribute>(property) != null
)
{
continue;
}
var subObj = property.GetValue(obj);
VisitObject(sb, subObj, property.Name);
}
}
sb.AppendFormat("</{0}>", name);
}
// 预处理保留方法（"js", "jq", "ext", "api", "apis"）
static bool ProcessReservedMethod(HttpContext context, Type type, string methodName, Dictionary <string, object> args)
{
string methodNameLower = methodName.ToLower();
int cacheDuration = ReflectHelper.GetCacheDuration(type);
// 输出api接口展示页面
var lastChar = methodNameLower.Substring(methodNameLower.Length - 1);
if (lastChar == "_" || lastChar == "$")
{
var name = methodName.Substring(0, methodName.Length - 1);
var typeapi = GetTypeApi(type);
var api = FindApi(typeapi, name);
var result = BuildApiHtml(api);
context.Response.Clear();
context.Response.ContentType = "text/html";
context.Response.Write(result.ToString());
}
// 输出api接口测试页面
else if (lastChar == "!")
{
var name = methodName.Substring(0, methodName.Length - 1);
var typeapi = GetTypeApi(type);
var api = FindApi(typeapi, name);
var result = BuildApiTestHtml(api);
context.Response.Clear();
context.Response.ContentType = "text/html";
context.Response.Write(result.ToString());
}
else
{
// 保留方法名
string[] arr = { "js", "jq", "ext", "api", "apis" };
if (!((IList <string>)arr).Contains(methodNameLower))
{
return(false);
}
// 输出api接口页面
if (methodNameLower == "api")
{
var typeapi = GetTypeApi(type);
var result = BuildApiListHtml(typeapi);
context.Response.Clear();
context.Response.ContentType = "text/html";
context.Response.Write(result);
}
// 输出api接口清单
else if (methodNameLower == "apis")
{
var typeapi = GetTypeApi(type);
context.Response.Clear();
WriteResult(context, typeapi, ResponseType.JSON);
}
// 输出js/jquery/ext脚本
else
{
string nameSpace = GetJsNamespace(type, args);
string className = GetJsClassName(type, args);
StringBuilder result = GetJs(type, nameSpace, className, cacheDuration, methodNameLower);
WriteResult(context, result, ResponseType.JavaScript);
}
}
// 处理缓存
CacheHelper.SetCachePolicy(context, cacheDuration);
return(true);
}
