Http Get 和 Post

  最近工作中要求由客戶端向服務端發送數據,採用的是Http協議,即Get和Post請求操作。通常情況下,Get用於請求數據,Post用於上傳數據更新服務器。Get請求應該是安全的和等冪的。

  在提交表單時,如果將表單的Method屬性設置爲get,那麼表單提交採用get方式提交數據發送請求,使用get方式,表單中的信息是以Key=Value&Key=Value的方式連接在Url之後。採用ASP.NET MVC 3舉例驗證:

View:

@{
    ViewBag.Title = "Http Get 與 Post學習分析";
}

<h2>Http Get 與 Post學習分析</h2>
@using (Html.BeginForm("Add", "Student", FormMethod.Get))
{
    <table>
        <tr>
            <td>UserName:</td>
            <td><input type="text" name="userName" id="userName" /></td>
            <td>Password:</td>
            <td><input type="text" name="passWord" id="password" /></td>
            <td><input type="submit" value="Submit" /></td>
        </tr>
    </table>
}

Controller:

public class StudentController : Controller
    {
        public ActionResult Add(string userName, string passWord)
        {
            string information = "UserName: " + userName + "Password: " + passWord;
            return View();
        }

    }

初始運行:

UserName、Password文本框分別輸入:123456,單擊Submit按鈕:

該get請求Headers:

Request URL:http://localhost:4126/?userName=123456&passWord=123456
Request Method:GET
Status Code:200 OK

Request Headers:

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Charset:GBK,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:zh-CN,zh;q=0.8
Connection:keep-alive
Host:localhost:4126
Referer:http://localhost:4126/
User-Agent:Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.162 Safari/535.19

Query String Parameters,連接到Url之後

userName:123456
passWord:123456

Response Headers:

Cache-Control:private
Connection:Close
Content-Length:408
Content-Type:text/html; charset=utf-8
Date:Sun, 20 May 2012 16:11:00 GMT
Server:ASP.NET Development Server/10.0.0.0
X-AspNet-Version:4.0.30319
X-AspNetMvc-Version:3.0

  由於get方式,數據存放在Url中的,採用明文方式,所以安全性不高,並且get方式最多隻能傳輸1024個字節

對於Post方式,表單中的數據時存放在http請求的Header中的,不可見。

View:

@{
    ViewBag.Title = "Http Get 與 Post學習分析";
}

<h2>Http Get 與 Post學習分析</h2>
@using (Html.BeginForm("Add", "Student", FormMethod.Post))
{
    <table>
        <tr>
            <td>UserName:</td>
            <td><input type="text" name="userName" id="userName" /></td>
            <td>Password:</td>
            <td><input type="text" name="passWord" id="password" /></td>
            <td><input type="submit" value="Submit" /></td>
        </tr>
    </table>
}

Controller:

public class StudentController : Controller
    {
        public ActionResult Add()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Add(string userName, string passWord)
        {
            string information = "UserName: " + userName + "Password: " + passWord;
            return View();
        }

    }

初始運行:

UserName、Password文本框分別輸入:123456,單擊Submit按鈕:

下面來觀察http Header:

Request URL:http://localhost:4126/
Request Method:POST
Status Code:200 OK

Request Headers:

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Charset:GBK,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:zh-CN,zh;q=0.8
Cache-Control:max-age=0
Connection:keep-alive
Content-Length:31
Content-Type:application/x-www-form-urlencoded
Host:localhost:4126
Origin:http://localhost:4126
Referer:http://localhost:4126/
User-Agent:Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.162 Safari/535.19

Form Data:post方式數據存放容器

userName:123456
passWord:123456

Response Headers:

Cache-Control:private
Connection:Close
Content-Length:409
Content-Type:text/html; charset=utf-8
Date:Sun, 20 May 2012 16:27:55 GMT
Server:ASP.NET Development Server/10.0.0.0
X-AspNet-Version:4.0.30319
X-AspNetMvc-Version:3.0

由此可見:Post安全性高,傳輸數據量大。以此作爲筆記,如有不足之處,請指正。

 

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