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279using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Web.Routing;
using System.Web;
using System.Xml;
namespace JsAction
{
public abstract class JsActionHandler : IHttpHandler, IRouteHandler
{
/// <summary>
/// Is the request reusable?
/// </summary>
public bool IsReusable
{
get { return true; }
}
/// <summary>
/// Processes the request
/// </summary>
/// <param name="context">context</param>
public virtual void ProcessRequest(HttpContext context)
{
string endJsCode = "";
this.qstring = context.Request.QueryString["data"];
var documentate = !string.IsNullOrEmpty(context.Request.QueryString["doc"]);
if (context.Cache.Get(cacheKey) == null || documentate == true)
{
var type = context.ApplicationInstance.GetType();
while (type != null && type.Namespace == "ASP")
type = type.BaseType;
var asm = type == null ? null : type.Assembly;
this.SearchAsm.Value.Add(asm);
var groupedMethods = this.GetMethodsWith(SearchAsm.Value.ToArray());
if (groupedMethods.Count() == 0)
return;
var js = new StringBuilder();
if (!documentate)
js.Append(@"if(typeof trd=='undefined'){function trd(a){for(var b in a){if(typeof a[b]=='object')trd(a[b]);if(typeof a[b]=='string'&&a[b].indexOf('/Date')==0){var c=a[b].replace(/\/Date\((-?\d+)\)\//,'$1');a[b]=new Date(parseInt(c))}}}}").Append("(function(a){if(a.isFunction(String.prototype.format)===false){String.prototype.format=function(){var a=this;varb=arguments.length;while(b--){a=a.replace(new RegExp('\\\\{'+b+'\\\\}','gim'),arguments[b])}return a}}if(a.isFunction(Date.prototype.toISOString)===false){Date.prototype.toISOString=function(){var a=function(a, b){a=a.toString();for(var c=a.length;c<b;c++){a='0'+a}return a};var b=this;return '{0}-{1}-{2}T{3}:{4}:{5}.{6}Z'.format(b.getUTCFullYear(), a(b.getUTCMonth() + 1, 2), a(b.getUTCDate(), 2), a(b.getUTCHours(), 2), a(b.getUTCMinutes(), 2), a(b.getUTCSeconds(), 2), a(b.getUTCMilliseconds(), 3)) } } var b = function (c, d, e, f) { if (a.isPlainObject(c)) { for (var g in c) { if (f === true || typeof c[g] !== 'undefined' && c[g] !== null) { b(c[g], d, e.length > 0 ? e + '.' + g : g, f) } } } else { if (a.isArray(c)) { a.each(c, function (a, c) { b(c, d, '{0}[{1}]'.format(e, a)) }); return } if (!a.isFunction(c)) { if (c instanceof Date) { d.push({ name: e, value: c.toISOString() }) } else { var h = typeof c; switch (h) { case 'boolean': case 'number': h = c; break; case 'object': if (f !== true) { return }; default: h = c || '' } d.push({ name: e, value: h }) } } } }; a.extend({ toDictionary: function (c, d, e) { c = a.isFunction(c) ? c.call() : c; if (arguments.length === 2 && typeof d === 'boolean'){e=d;d=''}e=typeof e==='boolean'?e:false;var f=[];b(c,f,d||'',e);return f}})})(jQuery);");
js.Append("if (typeof JsActions=='undefined'){var JsActions={};JsActions.WebApi={};}");
this.groups = context.Request.QueryString["data"].Split(',');
foreach (var controller in groupedMethods)
{
string ControllerName = controller.Key.Name.Substring(0, controller.Key.Name.IndexOf("Controller"));
js.AppendFormat("JsActions{1}.{0}={{", ControllerName, InnerObject);
foreach (var method in controller)
GenerateMethodCall(js, method, ControllerName, documentate);
js.Remove(js.Length - 1, 1).Append("};");
}
this.ComplexTypeDecomposition(js, ComplexTypeList, documentate);
if (alerts.IsValueCreated && !documentate)
{
alerts.Value.Remove(alerts.Value.Length - 1, 1);
js.Append("jQuery(document).ready(function(){{jQuery('body').prepend('<div style=\"background-color:#FF8080;border:1px solid black;margin:auto auto auto auto;\"><h2>JsAction debug message</h2><p>The following groupedMethods can handle multiple HttpVerbs, but no preference was choosen, and <a href=\"#\">GET</a> was assumed: <br/><table style=\"border-style:dotted;\"><tr><th>Method Name</th><th>Controller</th><th>Action</th></tr>");
foreach (var item in alerts.Value.ToString().Split(','))
{
js.Append("<tr>");
foreach (var it in item.Split('_'))
js.AppendFormat("<td>{0}</td>", it);
js.Append("</tr>");
}
js.Append("</table></p><p>Note: This message will output only in debug mode. JsAction will throw an <b>Exception</b> when debugger is not attached.</p></div>');}});");
alerts.Value.Clear();
}
if (documentate)
{
JsAction.ext.JSBeautify j = new ext.JSBeautify(js.ToString(), new ext.JSBeautifyOptions());
endJsCode = j.GetResult();
context.Response.Cache.SetCacheability(HttpCacheability.NoCache); //regenerate a new fresh file every time.
}
else
{
endJsCode = js.ToString();
context.Cache.Insert(cacheKey, endJsCode);
}
}
else
{
endJsCode = context.Cache.Get(cacheKey).ToString();
}
context.Response.ContentType = "application/javascript";
context.Response.Charset = string.Empty;
context.Response.Write(endJsCode);
context.Response.End();
}
/// <summary>
/// Gets http handler to manage request
/// </summary>
/// <param name="requestContext">request context</param>
/// <returns>HttpHandler</returns>
public IHttpHandler GetHttpHandler(RequestContext requestContext)
{
this.requestContext = requestContext;
return this;
}
/// <summary>
/// Register externals assembly to keep in mind when generating javascript
/// </summary>
/// <param name="asm">Assembly to add</param>
public void RegisterExternalAssembly(params Assembly[] asm)
{
this.SearchAsm.Value.AddRange(asm);
}
protected void DocumentateTheFunction(StringBuilder js, MethodInfo method)
{
const string ajaxOptionParam = "<param name=\"options\" type=\"ajaxSettings\">[OPTIONAL] AjaxOptions partial object; it will be mergend with the one sent to .ajax jQuery function</param><returns type=\"jqXHR\"/>";
try
{
var doc = ext.DocsByReflection.XMLFromMember(method);
foreach (XmlNode node in doc.ChildNodes)
{
if (node.Name == "param")
{
var typenode = node.OwnerDocument.CreateAttribute("type");
var thetype = method.GetParameters().Where(w => w.Name == node.Attributes.GetNamedItem("name").Value).First().ParameterType;
if (thetype.Name.Contains("`1"))
{
var GenericType = thetype.GetGenericArguments()[0].Name;
typenode.InnerText = string.Concat(GenericType, thetype.Name.Substring(0, thetype.Name.Length - 2));
}
node.Attributes.Append(typenode);
}
}
var strdoc = string.Concat(@"///", string.Concat(doc.InnerXml, ajaxOptionParam).Replace(Environment.NewLine, string.Concat(Environment.NewLine, "///")), Environment.NewLine);
js.Append(strdoc);
}
catch (JsAction.ext.DocsByReflectionException)
{
//There is no documentation. We will create it on the fly.
foreach (var parameter in method.GetParameters())
{
string paramType = parameter.ParameterType.Name;
if (paramType.Contains("`1"))
{
var GenericType = parameter.ParameterType.GetGenericArguments()[0].Name;
paramType = string.Concat(GenericType, paramType.Substring(0, paramType.Length - 2));
}
js.AppendFormat("///<param name=\"{0}\" type = \"{1}\"></param>{2}", parameter.Name, paramType, Environment.NewLine);
}
js.AppendLine("///" + ajaxOptionParam);
}
}
/// <summary>
/// Stub. Complex type decomposition for better intellisense
/// </summary>
/// <param name="js">js stringBuilder</param>
/// <param name="ComplexTypeList">Complex list to scan</param>
protected void ComplexTypeDecomposition(StringBuilder js, Lazy<List<Type>> ComplexTypeList, bool documentate)
{
if (!ComplexTypeList.IsValueCreated)
return;
var list = ComplexTypeList.Value.Distinct();
int w = list.Count();
StringBuilder tmp = new StringBuilder(50);
for (int i = 0; i < w; i++)
{
tmp.Clear().EnsureCapacity(50);
var props = list.ElementAt(i).GetProperties();
js.AppendFormat("if (typeof {0} == 'undefined') {{function {0}({1}){{", list.ElementAt(i).Name, string.Join(",", props.Select(p => p.Name)));
foreach (var prop in props)
{
if (prop.PropertyType.IsClass && !prop.PropertyType.IsPrimitive && prop.PropertyType != typeof(string))
{
ComplexTypeList.Value.Add(prop.PropertyType.GetType());
w++;
}
else
{
if (documentate)
js.AppendFormat("///<param name=\"{0}\" type = \"{1}\"></param>{2}", prop.Name, prop.PropertyType, Environment.NewLine);
tmp.AppendFormat("this.{0}={0};", prop.Name);
}
}
js.Append(tmp).Append("}}");
}
}
/// <summary>
/// Gets type for IQueryable
/// </summary>
/// <param name="seqType">Sequence type</param>
/// <returns>Real type reference</returns>
protected Type FindIEnumerable(Type seqType)
{
if (seqType == null || seqType == typeof(string))
return null;
if (seqType.IsArray)
return typeof(IEnumerable<>).MakeGenericType(seqType.GetElementType());
if (seqType.IsGenericType)
{
foreach (Type arg in seqType.GetGenericArguments())
{
Type ienum = typeof(IEnumerable<>).MakeGenericType(arg);
if (ienum.IsAssignableFrom(seqType))
{
return ienum;
}
}
}
Type[] ifaces = seqType.GetInterfaces();
if (ifaces != null && ifaces.Length > 0)
{
foreach (Type iface in ifaces)
{
Type ienum = FindIEnumerable(iface);
if (ienum != null) return ienum;
}
}
if (seqType.BaseType != null && seqType.BaseType != typeof(object))
{
return FindIEnumerable(seqType.BaseType);
}
return null;
}
#region Abstract Part
protected abstract void GenerateMethodCall(StringBuilder js, MethodInfo method, string Controller, bool documentate);
protected abstract IEnumerable<IGrouping<Type, MethodInfo>> GetMethodsWith(params Assembly[] asm);
protected abstract string cacheKey { get; }
protected abstract string InnerObject { get; }
#endregion
#region Protected Members
protected RequestContext requestContext;
protected Lazy<StringBuilder> alerts = new Lazy<StringBuilder>(() => { return new StringBuilder(200); }, false);
protected Lazy<List<Assembly>> SearchAsm = new Lazy<List<Assembly>>(() => { return new List<Assembly>(3); }, false);
protected Lazy<List<Type>> ComplexTypeList = new Lazy<List<Type>>(() => { return new List<Type>(4); }, false);
protected string[] groups;
protected string qstring { get; set; }
#endregion
}
}