Dapr + .NET 实战本地调试
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前几节开发Dapr应用程序时,我们使用 dapr cli 来启动dapr服务,就像这样:
dapr run --dapr-http-port 3501 --app-port 5001 --app-id frontend dotnet .\\FrontEnd\\bin\\Debug\\net5.0\\FrontEnd.dll
如果你想要通过dapr调试服务呢?在这里使用 dapr 运行时(daprd) 来帮助实现这一点。具体原理就是先从命令行中运行符合正确参数的 daprd,然后启动您的代码并附加调试器。
1.配置launch.json
vscode打开项目,并创建launch.json
修改launch.json的preLaunchTask,自定义名字,preLaunchTask将引用在 tasks.json 文件中定义的任务。
{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "Frontend-.NET Core Launch (web)",
"type": "coreclr",
"request": "launch",
//"preLaunchTask": "build",
"preLaunchTask": "daprd-frontend",
"program": "${workspaceFolder}/FrontEnd/bin/Debug/net5.0/FrontEnd.dll",
"args": [],
"cwd": "${workspaceFolder}/FrontEnd",
"stopAtEntry": false,
"serverReadyAction": {
"action": "openExternally",
"pattern": "\\\\bNow listening on:\\\\s+(https?://\\\\S+)"
},
"env": {
"ASPNETCORE_ENVIRONMENT": "Development"
},
"sourceFileMap": {
"/Views": "${workspaceFolder}/Views"
}
},
{
"name": ".NET Core Attach",
"type": "coreclr",
"request": "attach"
}
]
}
2.配置task.json
需要在task.json文件中定义一个 daprd task和问题匹配器(problem matcher)。这里有两个通过上述 preLaunchTask 成员引用。在 dpred -frontend task下,还有一个dependsOn成员,它引用build任务,以确保最新的代码正在运行/调试。用了 problemMatcher,这样当 daprd 进程启动和运行时,VSCode 就能够知道。
{
"version": "2.0.0",
"tasks": [
{
"label": "build",
"command": "dotnet",
"type": "process",
"args": [
"build",
"${workspaceFolder}/FrontEnd/FrontEnd.csproj",
"/property:GenerateFullPaths=true",
"/consoleloggerparameters:NoSummary"
],
"problemMatcher": "$msCompile"
},
{
"label": "publish",
"command": "dotnet",
"type": "process",
"args": [
"publish",
"${workspaceFolder}/FrontEnd/FrontEnd.csproj",
"/property:GenerateFullPaths=true",
"/consoleloggerparameters:NoSummary"
],
"problemMatcher": "$msCompile"
},
{
"label": "watch",
"command": "dotnet",
"type": "process",
"args": [
"watch",
"run",
"${workspaceFolder}/FrontEnd/FrontEnd.csproj",
"/property:GenerateFullPaths=true",
"/consoleloggerparameters:NoSummary"
],
"problemMatcher": "$msCompile"
},
{
"label": "daprd-frontend",
"command": "daprd",
"args": [
"-app-id",
"frontend",
"-app-port",
"5001",
"-dapr-http-port",
"3501",
"-placement-host-address",
"localhost:6050",
"-components-path",
"C:\\\\Users\\\\chesterychen\\\\.dapr\\\\components"
],
"isBackground": true,
"problemMatcher": {
"pattern": [
{
"regexp": ".",
"file": 1,
"location": 2,
"message": 3
}
],
"background": {
"beginsPattern": "^.*starting Dapr Runtime.*",
"endsPattern": "^.*waiting on port.*"
}
},
"dependsOn": "build"
},
]
}
因为没有使用 dapr run* cli 命令, 所以运行 daprd list 命令将不会显示当前正在运行的应用列表。
3.调试
在StateController.GetAsync中新增断点,运行并调用http://192.168.43.94:3501/v1.0/invoke/frontend/method/State。
4.不用vscode调试
cmd运行以下命令,监听5001端口
daprd run -dapr-http-port 3501 -app-port 5001 -app-id frontend -placement-host-address localhost:6050 -components-path C:\\\\Users\\\\chesterychen\\\\.dapr\\\\components
然后直接vs运行项目,即可调试
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