C # attribute application: Class signing

In the application of other people's interface, always use the signature, very do not understand the signature how to know how to do. Learn by learning about the attribute. You can use attribute to do signature applications.

The process is as follows:

First we need to define a class that inherits attribute. The main use of this class is that the signature needs to use the method, parameters and get encrypted files

1   Public classCashisongattribute:attribute2     {3         /// <summary>4         ///Signature Parameters5         /// </summary>6          Public string[] Param {Get;Set; }7         /// <summary>8         ///whether to sign9         /// </summary>Ten          Public BOOLissign {Get;Set; } One         /// <summary> A         ///Encrypting Files -         /// </summary> -         /// <param name= "BP" ></param> the         /// <param name= "Mi" ></param> -         /// <returns></returns> -          Public stringparamencryption (basepage bp,system.reflection.methodinfo mi) -         { +             if(Param! =NULL&& param.length >0) -             { +                 stringMD5 ="op"+mi. Name.tolower (); A                 foreach(stringIteminchParam) at                 { -                     if(item. ToLower () = ="op"|| Item. ToLower () = =" Sign") -                         Continue; -MD5 + = Item +BP. Getrequest (item); -                 } -                 byte[] Bytestr =Encoding.Default.GetBytes (MD5); inMD5 _MD5 =NewMD5CryptoServiceProvider (); -                 byte[] Bytesend =_md5.computehash (BYTESTR); to                 returnBitconverter.tostring (Bytesend). Replace ("-",""); +             } -             return ""; the         } *}

View Code

Create a new page that creates a method on the page and adds the attribute

1[Cashisong (issign =true, Param =New string[] {"op","name" })]2          Public stringGetceshicon ()3         {4             return "Signature Successful! ";5}

The following key is again through the invocation of the time, verify that the parameters are consistent, the encryption file is correct.

Creates a base class BasePage, which is primarily responsible for accepting parameters, specifying the method specified by the parameter, and judging whether the signature information is correct.

This will be used: System.Reflection.MethodInfo application, get features attribute parameter content.

   Public classBasepage:page { PublicBasePage () { This. Load + =NewEventHandler (basepage_load); }        voidBasepage_load (Objectsender, EventArgs e) {Response.AddHeader ("Accept-charset","UTF-8"); stringOP = getrequest ("op"); if(!string. IsNullOrEmpty (OP)) {System.Reflection.MethodInfo mi= This. GetType ().                GetMethod (OP);            Attribute_jude (MI); }             This.        Response.End (); }        /// <summary>        ///Signature Judgment/// </summary>        /// <param name= "Mi" ></param>         Public voidattribute_jude (MethodInfo mi) {msgmodel Msg=NewMsgmodel (); if(MI.) IsDefined (typeof(Cashisongattribute),false))            {                Object[] Attrs = mi. GetCustomAttributes (typeof(Cashisongattribute),false); Cashisongattribute Iplimit= (Cashisongattribute) attrs[0]; ObjectResponsestr=NULL; if(Iplimit! =NULL&& Iplimit. Param.length >0)                {                    stringServer_sign = Getrequest (" Sign"); stringClient_sign = Iplimit. Paramencryption ( This, MI); if(!server_sign. Equals (Client_sign, StringComparison.OrdinalIgnoreCase) &&Iplimit. issign) {msg.msg="Sing Error"; Msg.toile=0;                        Send (MSG); return; } responsestr= mi. Invoke ( This,NULL); } msg.toile=1; Msg.msg=Responsestr.                ToString ();            Send (MSG); }        }         Public voidSend (Msgmodel Msg) {Response.AddHeader ("Content-type","Applictaion/json"); JavaScriptSerializer JavaScript=NewJavaScriptSerializer (); stringCon =javascript.serialize (MSG);        Response.Write (Con); }         Public stringGetrequest (stringkey) {            if(Request.querystring[key] = =NULL)                return ""; Else                returnRequest.querystring[key]; }    }     Public classMsgmodel { Public stringmsg {Get;Set; }  Public inttoile {Get;Set; } }

method to get the contents of an attribute parameter (Cashisongattribute is a custom attribute class)

if (MI.) IsDefined (typeoffalse))            {                object[] attrs = mi. GetCustomAttributes (typeoffalse);                 = (cashisongattribute) attrs[0];            }

C # attribute application: Class signing