微信支付中扫码后能及时获取到服务器反馈是如何实现的?-PHP Tutorial-php.cn

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微信支付中扫码后能及时获取到服务器反馈是如何实现的?

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Jun 06, 2016 pm 08:31 PM

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我们在使用微信支付时基本的场景如下:
用户A(收款人)输入收款金额生成二维码,
用户B(支付人)用微信客户端扫描生成的二维码,
弹出密码框.
输入密码正确后, 用户A接收到对应的收款提示.

问题:
用户A设备之间是如何感知用户B扫码输入密码后,
服务器向用户A的提示是如何实现的?
这些推送的技术是如何做到实时的?

回复内容：

问题:
用户A设备之间是如何感知用户B扫码输入密码后,
服务器向用户A的提示是如何实现的?
这些推送的技术是如何做到实时的?

如果您研究一下京东的微信扫码支付，你就会发现其实不是推送的，而是3秒一次去poll（定时查询的）。

使用我们BeeCloud可以轻松接入微信扫码支付，你可以试用一下，我们提供了查询的接口。

开发步骤是，先生成支付二维码，之后每3秒一次用查询接口去查询订单状态，知道订单变成支付，才更新前端网页的UI

像微信扫码登录、扫码支付他们的原理基本都是一样的，都是可以通过轮询、长连接、websocket等技术来实现的，
微信支付中扫码后能及时获取到服务器反馈是如何实现的?

这是某网站的微信扫码登录，当前页面每隔几秒就会发起一个新的请求，例如当用户扫码成功以后会在服务器保存一个标识，当前页面请求时获取到了这个标识则刷新当前页面。

是使用的长轮循，你查看它二维码页面的连接信息就能看到。

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