【移动应用开发技术】如何处理微信公众号开发中的消息与事件

【移动应用开发技术】如何处理微信公众号开发中的消息与事件

/upload/information/20201208/260/12337.jpg/upload/information/20201208/260/12339.jpg/upload/information/20201208/260/12341.jpg///

<summary>

///

验证消息的有效性

///

</summary>

///

<param

name="context"></param>

///

<returns>如果消息有效，返回true；否则返回false。</returns>

private

bool

Validate(HttpContext

context)

{

string

username

=

RequestEx.TryGetQueryString("username");

//在接口配置的URL中加入了username参数，表示哪个微信公众号

AccountInfo

account

=

AccountInfoCollection.GetAccountInfo(username);

if

(account

==

null)

return

false;

string

token

=

account.Token;

string

signature

=

RequestEx.TryGetQueryString("signature");

string

timestamp

=

RequestEx.TryGetQueryString("timestamp");

string

nonce

=

RequestEx.TryGetQueryString("nonce");

if

(string.IsNullOrWhiteSpace(signature)

||

string.IsNullOrWhiteSpace(timestamp)

||

string.IsNullOrWhiteSpace(nonce))

return

false;

return

xrwang.weixin.PublicAccount.Utility.CheckSignature(signature,

token,

timestamp,

nonce);

}

验证消息真实性验证消息真实性RequestMessageHelper

helper

=

new

RequestMessageHelper(context.Request);

if(helper.Message

!=

null)

{

//消息解析成功，对它进行处理

}RequestBaseMessage

bm=helper.Message;

switch(bm.MsgType)

{

case

RequestMessageTypeEnum.text:

//文本消息

HandleTextMessage((RequestTextMessage)bm);

break;

case

RequestMessageTypeEnum.image:

//图片消息

HandleImageMessage((RequestImageMessage)bm);

break;

//处理其他消息

case

RequestMessageTypeEnum.event:

//事件

RequestEventMessage

ev=(RequestEventMessage)bm;

switch(ev.Event)

{

case

RequestEventTypeEnum.subscribe:

//订阅

HandleSubscribeMessage((RequestSubscribeMessage)ev);

break;

case

RequestEventTypeEnum.unsubscribe:

//取消订阅

HandleUnsubscribeMessage((RequestUnsubscribeMessage)ev);

break;

//处理其他事件

}

break;

default:

break;

}///

<summary>

///

处理微信的POST请求

///

</summary>

///

<param

name="context"></param>

///

<returns>返回xml响应</returns>

private

string

HandlePost(HttpContext

context)

{

RequestMessageHelper

helper

=

new

RequestMessageHelper(context.Request);

if

(helper.Message

!=

null)

{

ResponseBaseMessage

responseMessage

=

HandleRequestMessage(helper.Message);

return

responseMessage.ToXml(helper.EncryptType);

}

else

return

string.Empty;

}

///

<summary>

///

处理请求消息，返回响应消息

///

</summary>

///

<returns>返回响应消息</returns>

private

ResponseBaseMessage

HandleRequestMessage(RequestBaseMessage

requestMessage)

{

ResponseTextMessage

response

=

new

ResponseTextMessage(requestMessage.From