优雅的在WinForm/WPF/控制台 中使用特性封装WebApi
说明
在C/S端作为Server，建立HTTP请求，方便快捷。
1.使用到的类库
Newtonsoft.dll
2.封装 HttpListener
HttpApi类
public class HttpApi
{
private static List<HttpListener> HttpListenerList = new List<HttpListener>();
/// <summary>
/// 初始化服务
/// </summary>
public static void InitService()
{
//获取程序集下面的所有的类
Type[] types = System.Reflection.Assembly.GetExecutingAssembly().GetTypes();
foreach (Type item_type in types)
{
//定义是否有类的特性标识
bool IsHasFormApi = false;
//取类上的自定义特性
object[] objs = item_type.GetCustomAttributes(typeof(FromApi), true);
foreach (object obj in objs)
{
FromApi fromApi = obj as FromApi;
if (fromApi != null)
{
IsHasFormApi = true;
break;
}
}
if (IsHasFormApi)
{
// 获取完全名称
String className = item_type.FullName;
// 根据命名空间反射类的Type
Type type = Type.GetType(className);
object objInstance = type.Assembly.CreateInstance(className);
// 获取所有的方法
MethodInfo[] info = type.GetMethods();
// 遍历所有的方法
foreach (MethodInfo item in info)
{
// 获取Http请求方法
HttpMethod httpMethod = item.GetCustomAttribute<HttpMethod>();
// 获取Action
ActionName actionName = item.GetCustomAttribute<ActionName>();
// 判断有没有特性
if (httpMethod != null || actionName != null)
{
HttpListener listerner = new HttpListener();
listerner.AuthenticationSchemes = AuthenticationSchemes.Anonymous;//指定身份验证 Anonymous匿名访问
string url = "http://127.0.0.1:8011";
if (!string.IsNullOrEmpty(ConfigurationManager.AppSettings["httpserver"]))
{
url = "http://" + ConfigurationManager.AppSettings["httpserver"];
}
listerner.Prefixes.Add(url + actionName.URL + "/");
//开启服务
if (!listerner.IsListening)
{
listerner.Start();
AsyncCallback ac = new AsyncCallback(GetContextAsyncCallback);
CallbackObject callback = new CallbackObject() { Listerner = listerner, MethodItem = item, ClassInstance = objInstance, HttpMethod = httpMethod.method };
listerner.BeginGetContext(ac, callback);
HttpListenerList.Add(listerner);
}
}
}
}
}
}
/// <summary>
/// 收到监听请求回调
/// </summary>
/// <param name="ia"></param>
private static void GetContextAsyncCallback(IAsyncResult ia)
{
CallbackObject state = ia.AsyncState as CallbackObject;
if (ia.IsCompleted)
{
HttpListenerContext ctx = state.Listerner.EndGetContext(ia);
var request = ctx.Request;
HttpListenerResponse response = ctx.Response;
try
{
//判断 请求 方式
if (request.HttpMethod.ToUpper() == state.HttpMethod.ToString().ToUpper() || Method.All.ToString().ToUpper() == state.HttpMethod.ToString().ToUpper())
{
string rawData;
using (var reader = new StreamReader(request.InputStream, request.ContentEncoding))
{
rawData = reader.ReadToEnd();
}
//获取方法参数列表
ParameterInfo[] parameterInfos = state.MethodItem.GetParameters();
//参数
// List<object> paramters = new List<object>();
object[] paramters = new object[parameterInfos.Length];
for (int i = 0; i < parameterInfos.Length; i++)
{
ParameterInfo item = parameterInfos[i];
if (item.ParameterType == typeof(string) || item.ParameterType == typeof(int) || item.ParameterType == typeof(bool))
{
paramters[i] = JsonHelper.GetJsonValue(rawData, item.Name);
}
else
{
Type t = item.ParameterType;
paramters[i] = JsonConvert.DeserializeObject(rawData, t);
}
}
object resobj = state.MethodItem.Invoke(state.ClassInstance, paramters);
if (typeof(string) == resobj.GetType())
{
ResponseWrite(response, resobj.ToString());
}
else
{
ResponseWrite(response, JsonConvert.SerializeObject(resobj));
}
}
else
{
ResponseWrite(response, $"不支持{request.HttpMethod.ToUpper()}方法请求！");
}
}
catch (Exception ex)
{
ResponseWrite(response, $"服务出现异常，异常信息:{ex.Message}");
}
}
//重新监听 不写的话只能调用一次
AsyncCallback ac = new AsyncCallback(GetContextAsyncCallback);
state.Listerner.BeginGetContext(ac, state);
}
/// <summary>
/// 回写响应
/// </summary>
/// <param name="response"></param>
/// <param name="Content"></param>
private static void ResponseWrite(HttpListenerResponse response, string Content)
{
//使用Writer输出http响应代码
using (System.IO.StreamWriter writer = new System.IO.StreamWriter(response.OutputStream, new UTF8Encoding()))
{
response.ContentType = "application/json; charset=utf-8";
writer.WriteLine(Content);
writer.Close();
response.Close();
}
}
}
public enum Method
{
All, Post, Get
}
public class CallbackObject
{
/// <summary>
/// 监听
/// </summary>
public HttpListener Listerner { get; set; }
/// <summary>
/// 方法
/// </summary>
public MethodInfo MethodItem { get; set; }
/// <summary>
/// 调用者 对象
/// </summary>
public object ClassInstance { get; set; }
/// <summary>
/// 调用方式 Get Post
/// </summary>
public Method HttpMethod { get; set; }
}
特性类 ActionName
[AttributeUsage(AttributeTargets.Method)]
class ActionName : Attribute
{
public string URL { get; set; }
public ActionName()
{
}
public ActionName(string url)
{
this.URL = url;
}
}
特性类 HttpMethod
[AttributeUsage(AttributeTargets.Method)]
public class HttpMethod : Attribute
{
public Method method { get; set; }
public HttpMethod()
{
this.method = Method.All;
}
public HttpMethod(Method _method)
{
this.method = _method;
}
}
特性类 FromApi
[AttributeUsage(AttributeTargets.Class)]
public class FromApi : Attribute
{
//窗体里的具体方法忽略
}
帮助类 JsonHelper
public static class JsonHelper
{
public static string GetJsonValue(string json, string key)
{
string value = "";
if (string.IsNullOrEmpty(json)) { return ""; }
JObject jo = (JObject)JsonConvert.DeserializeObject(json);
if (jo.ContainsKey(key))
{
if (jo[key] != null)
{
value = jo[key].ToString();
}
}
return value;
}
public static List<string> GetJsonList(string json, string key)
{
List<string> value = new List<string>();
if (string.IsNullOrEmpty(json)) { return new List<string>(); }
JObject jo = (JObject)JsonConvert.DeserializeObject(json);
if (jo.ContainsKey(key))
{
if (jo[key] != null)
{
foreach (var item in jo[key])
{
value.Add(item.ToString());
}
}
}
return value;
}
}
3.在Web.config中增加
<appSettings>
<add key="httpserver" value="127.0.0.1:8022"/>
</appSettings>
4.使用方法
4.1在窗体类上增加 [FromApi] 特性
[FromApi]
public partial class ScoketForm : Form
{
}
4.2Program.cs 中增加 这种初始化方式会对程序集中所有带有 [FromApi] 特性的类进行初始化
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
//服务初始化
HttpApi.InitService(); //这里是增加初始化的代码
Application.Run(new SocketTest.gg.ScoketForm());
4.3具体使用方法 HttpMethod 后面可以不写，不写的话代表 支持两种请求方式 POST，GET 需要注意命名空间的导入
/// <summary>
/// 方法说明
/// </summary>
/// <returns></returns>
[HttpMethod(Method.Post), ActionName("/api/index")]
public HttpResult Index(List<string> Ids)
{
HttpResult httpResult = new HttpResult();
//具体方法内容
return httpResult;
}
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