node.js+express，实现RESTful API

node代码如下(exptest.js)：

var express = require('express');
var bodyParser = require('body-parser');
var app = express();
var patientinfo=require('./node_entity/patientinfo');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded

app.get('/api/patientinfo',patientinfo.get);
app.post('/api/patientinfo',patientinfo.update);
app.put('/api/patientinfo',patientinfo.put);
app.delete('/api/patientinfo',patientinfo.delete);

app.listen(3000);

patientinfo.js（位于node_entity目录下，可自定义）代码如下：

exports.get = function(req, res){

res.setHeader('Content-Type', 'application/json;charset=utf-8');
res.send('get patientinfo info ok');
console.log('遍历参数：');
for(var key in req.query)
console.log('%s = %s',key,req.query[key]);
console.log('patientinfo get ok!');
};

exports.delete = function(req, res){
res.setHeader('Content-Type', 'application/json;charset=utf-8');

res.send({status:"success", message:"delete patientinfo success"});
console.log('遍历参数：');
for(var key in req.body)
console.log('%s = %s',key,req.body[key]);
console.log('patientinfo delete ok!');
};

exports.update = function(req, res){
res.setHeader('Content-Type', 'application/json;charset=utf-8');

res.send({status:"success", message:"update patientinfo success"});
console.log('遍历参数：');
for(var key in req.body)
console.log('%s = %s',key,req.body[key]);
console.log('patientinfo update ok!');
};

exports.put = function(req, res){
res.setHeader('Content-Type', 'application/json;charset=utf-8');
console.log(req.body);

res.send({status:"success", message:"add patientinfo success"});
console.log('遍历参数：');
for(var key in req.body)
console.log('%s = %s',key,req.body[key]);
console.log('patientinfo put OK!');
};

通过C#编写一个winform程序，代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

enum Method
{
POST,
GET,
PUT,
DELETE
}
private string MyWebRequest(string webUrl,Method method, IDictionary<string, string> parameters, Encoding dataEncode)
{
string ret = string.Empty;
try
{
string paramData = "";
if (!(parameters == null || parameters.Count == 0))
{
StringBuilder buffer = new StringBuilder();
int i = 0;
foreach (string key in parameters.Keys)
{
if (i > 0)
{
buffer.AppendFormat("&{0}={1}", key, parameters[key]);
}
else
{
buffer.AppendFormat("{0}={1}", key, parameters[key]);
}
i++;
}

paramData = buffer.ToString();
}
if (method == Method.GET)
{
webUrl += "?" + paramData;
}

HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(new Uri(webUrl));
webReq.Method = method.ToString();
webReq.ContentType = "application/x-www-form-urlencoded";
//webReq.ContentType = "text/html";
if (method != Method.GET)
{
byte[] byteArray = dataEncode.GetBytes(paramData); //转化
webReq.ContentLength = byteArray.Length;
Stream newStream = webReq.GetRequestStream();
newStream.Write(byteArray, 0, byteArray.Length);//写入参数
newStream.Close();
}
HttpWebResponse response = (HttpWebResponse)webReq.GetResponse();
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
ret = sr.ReadToEnd();
// ret = HttpUtility.UrlDecode(ret);
sr.Close();
response.Close();

}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return ret;
}
private void button2_Click(object sender, EventArgs e)
{
Dictionary<string, string> param = new Dictionary<string, string>();
param["Function"] = "StudioList";
param["UserJID"] = "windows01@win-nq66026cp12";
string ret = MyWebRequest("http://127.0.0.1:3000/api/patientinfo", Method.POST, param, Encoding.UTF8);

MessageBox.Show(ret);
}
private void button3_Click(object sender, EventArgs e)
{
Dictionary<string, string> param = new Dictionary<string, string>();
param["Function"] = "StudioList";
param["UserJID"] = "windows01@win-nq66026cp12";
string ret = MyWebRequest("http://127.0.0.1:3000/api/patientinfo",Method.DELETE, param, Encoding.UTF8);

MessageBox.Show(ret);
}

private void button4_Click(object sender, EventArgs e)
{
Dictionary<string, string> param = new Dictionary<string, string>();
param["Function"] = "StudioList";
param["UserJID"] = "windows01@win-nq66026cp12";
string ret = MyWebRequest("http://127.0.0.1:3000/api/patientinfo",Method.PUT, param, Encoding.UTF8);

MessageBox.Show(ret);
}

private void button5_Click(object sender, EventArgs e)
{
Dictionary<string, string> param = new Dictionary<string, string>();
param["Function"] = "StudioList";
param["UserJID"] = "windows01@win-nq66026cp12";
string ret = MyWebRequest("http://127.0.0.1:3000/api/patientinfo",Method.GET, param, Encoding.UTF8);

MessageBox.Show(ret);
}
}
}

WinForm程序运行界面如下：



在Windows命令窗口运行node exptest.js，然后依次点击WinForm程序上的按钮，结果如下：