如何从网页中的串行端口读取 [英] How to read from Serial port in a webpage

问题描述

我想设计一个Web表单，用户应填写一些字段。应该从连接了特殊硬件的客户端计算机的串行端口（COM1）读取一个字段的值，并且用户按下硬件的发送到PC 键填写表格时。

I want to design a webform that user should fill some fields. The value of one field should be read from Serial port (COM1) of client computer which a special hardware is connected to it and the user presses the Send to PC key of the hardware when filling the form.

我如何在网页中收听 COM1 端口并获取COM1的值并将其放置在网络中

How i can listen to COM1 port in my webpage and get the value of COM1 and place it in the web form automatically?

我听说ActiveX控件可以做到这一点，但它仅与IE兼容（对吗？）。另一个选择是Java applet。

I heard that ActiveX controls can do this but it is compatible only with IE (right?). The other option is Java applets.

我想要一个简单的解决方案，该解决方案至少与IE / Firefox / Opera兼容。

I want a simple solution which be compatible with (at least) IE/Firefox/Opera.

我可以在服务器端使用ASP或PHP，但如果您能为每个解决方案提供解决方案，我将不胜感激。

I the server-side i can have ASP or PHP but i am appreciate if you give a solution for each.

更新：

我们可以告诉客户更改其安全设置以接受我们的ActiveX /小程序。

We can tell clients to change their security settings to accept our ActiveX/applet.

它我们也可以告诉客户安装一个自定义程序，该程序作为服务运行并从串行端口读取。

It is also possible for us to tell clients to install a custom program which runs as a service and reads from Serial port.

问题是读取的数据应输入到

The problem is the read data should be entered to the webform automatically and immediately.

java applet是个好主意，但是客户端必须安装较大的JRE。

The java applet is a good idea, but the client have to install JRE which is large in size.

还有其他选择吗？

推荐答案

使用Java Applet可以从串行端口读取，但是您可以出于安全原因需要签署小程序。要非正式地变硬（没有太阳变硬），您必须创建证书。 此处是一个示例。

With a Java Applet you can read from the serial port but you need to sign the applet for security reasons. To firm unofficially (no sun's firm) you have to create a certificate. Here is an example.

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