HTTP POST和GET的区别

1、HTTP 只有POST和GET 两种命令模式；

2、POST是被设计用来向上放东西的，而GET是被设计用来从服务器取东西的，GET也能够向服务器传送较少的数据，而Get之所以也能传送数据,只是用来设计告诉服务器,你到底需要什么样的数据.POST的信息作为HTTP 请求的内容，而GET是在HTTP 头部传输的；

3、POST与GET在HTTP 中传送的方式不同，GET的参数是在HTTP 的头部传送的，而Post的数据则是在HTTP 请求的内容里传送;

4、POST传输数据时，不需要在URL中显示出来，而GET方法要在URL中显示；

5、GET方法由于受到URL长度的限制,只能传递大约1024字节；POST传输的数据量大，可以达到2M，而根据微软方面的说法，微软对用 Request.Form() 可接收的最大数据有限制，IIS 4 中为 80 KB 字节，IIS 5 中为 100 KB 字节；

6、SOAP是依赖于HTTP POST模式实现的；



例子：

HTTP GET

发送

GET /DEMOWebServices2.8/Service.asmx/CancelOrder?UserID=string&PWD=string&OrderConfirmation=string HTTP/1.1

Host: api.efxnow.com

回复

HTTP/1.1 200 OK

Content-Type: text/xml; charset=utf-8

Content-Length: length

<?xml version=”1.0″ encoding=”utf-8″?>

<objPlaceOrderResponse xmlns=”https://api.efxnow.com/webservices2.3″>

<Success>boolean</Success>

<ErrorDescription>string</ErrorDescription>

<ErrorNumber>int</ErrorNumber>

<CustomerOrderReference>long</CustomerOrderReference>

<OrderConfirmation>string</OrderConfirmation>

<CustomerDealRef>string</CustomerDealRef>

</objPlaceOrderResponse>



HTTP POST

发送

POST /DEMOWebServices2.8/Service.asmx/CancelOrder HTTP/1.1

Host: api.efxnow.com

Content-Type: application/x-www-form-urlencoded

Content-Length: length

UserID=string&PWD=string&OrderConfirmation=string

回复

HTTP/1.1 200 OK

Content-Type: text/xml; charset=utf-8

Content-Length: length

<?xml version=”1.0″ encoding=”utf-8″?>

<objPlaceOrderResponse xmlns=”https://api.efxnow.com/webservices2.3″>

<Success>boolean</Success>

<ErrorDescription>string</ErrorDescription>

<ErrorNumber>int</ErrorNumber>

<CustomerOrderReference>long</CustomerOrderReference>

<OrderConfirmation>string</OrderConfirmation>

<CustomerDealRef>string</CustomerDealRef>

</objPlaceOrderResponse>



SOAP 1.2

发送

POST /DEMOWebServices2.8/Service.asmx HTTP/1.1

Host: api.efxnow.com

Content-Type: application/soap+xml; charset=utf-8

Content-Length: length

<?xml version=”1.0″ encoding=”utf-8″?>

<soap12:Envelope xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xmlns:xsd=”http://www.w3.org/2001/XMLSchema”xmlns:soap12=”http://www.w3.org/2003/05/soap-envelope”>

<soap12:Body>

<CancelOrder xmlns=”https://api.efxnow.com/webservices2.3″>

<UserID>string</UserID>

<PWD>string</PWD>

<OrderConfirmation>string</OrderConfirmation>

</CancelOrder>

</soap12:Body>

</soap12:Envelope>

回复

HTTP/1.1 200 OK

Content-Type: application/soap+xml; charset=utf-8

Content-Length: length

<?xml version=”1.0″ encoding=”utf-8″?>

<soap12:Envelope xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xmlns:xsd=”http://www.w3.org/2001/XMLSchema”xmlns:soap12=”http://www.w3.org/2003/05/soap-envelope”>

<soap12:Body>

<CancelOrderResponse xmlns=”https://api.efxnow.com/webservices2.3″>

<CancelOrderResult>

<Success>boolean</Success>

<ErrorDescription>string</ErrorDescription>

<ErrorNumber>int</ErrorNumber>

<CustomerOrderReference>long</CustomerOrderReference>

<OrderConfirmation>string</OrderConfirmation>

<CustomerDealRef>string</CustomerDealRef>

</CancelOrderResult>

</CancelOrderResponse>

</soap12:Body>

</soap12:Envelope>