我今天花了几个小时研究如何让Chrome本机消息传递与C#本机主机一起工作。从概念上讲,这很简单,但是我从这些其他问题的帮助中得到了一些帮助(部分):
Native Messaging Chrome
Native messaging from chrome extension to native host written in C#
Very Slow to pass "large" amount of data from Chrome Extension to Host (written in C#)
我的解决方案发布在下面。
答案 0 :(得分:33)
假设清单设置正确,这里是一个使用"端口"与C#主机通话的完整示例。方法:
using System;
using System.IO;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace NativeMessagingHost
{
class Program
{
public static void Main(string[] args)
{
JObject data;
while ((data = Read()) != null)
{
var processed = ProcessMessage(data);
Write(processed);
if (processed == "exit")
{
return;
}
}
}
public static string ProcessMessage(JObject data)
{
var message = data["text"].Value<string>();
switch (message)
{
case "test":
return "testing!";
case "exit":
return "exit";
default:
return "echo: " + message;
}
}
public static JObject Read()
{
var stdin = Console.OpenStandardInput();
var length = 0;
var lengthBytes = new byte[4];
stdin.Read(lengthBytes, 0, 4);
length = BitConverter.ToInt32(lengthBytes, 0);
var buffer = new char[length];
using (var reader = new StreamReader(stdin))
{
while (reader.Peek() >= 0)
{
reader.Read(buffer, 0, buffer.Length);
}
}
return (JObject)JsonConvert.DeserializeObject<JObject>(new string(buffer));
}
public static void Write(JToken data)
{
var json = new JObject();
json["data"] = data;
var bytes = System.Text.Encoding.UTF8.GetBytes(json.ToString(Formatting.None));
var stdout = Console.OpenStandardOutput();
stdout.WriteByte((byte)((bytes.Length >> 0) & 0xFF));
stdout.WriteByte((byte)((bytes.Length >> 8) & 0xFF));
stdout.WriteByte((byte)((bytes.Length >> 16) & 0xFF));
stdout.WriteByte((byte)((bytes.Length >> 24) & 0xFF));
stdout.Write(bytes, 0, bytes.Length);
stdout.Flush();
}
}
}
如果您不需要与主持人积极沟通,则使用runtime.sendNativeMessage
可以正常使用。要防止主机挂起,只需删除while
循环并执行一次读/写操作。
为了测试这一点,我在这里使用了Google提供的示例项目:https://chromium.googlesource.com/chromium/src/+/master/chrome/common/extensions/docs/examples/api/nativeMessaging
注意:我使用Json.NET来简化json序列化/反序列化过程。
我希望这对某人有帮助!