前幾節開發Dapr應用程序時，我們使用 dapr cli 來啟動dapr服務，就像這樣：

dapr run --dapr-http-port 3501 --app-port 5001 --app-id frontend dotnet .\FrontEnd\bin\Debug\net5.0\FrontEnd.dll

如果你想要通過dapr調試服務呢？在這里使用 dapr 運行時(daprd) 來幫助實現這一點。具體原理就是先從命令行中運行符合正確參數的 daprd，然后啟動您的代碼并附加調試器。

1.配置launch.json

vscode打開項目，并創建launch.json

?修改launch.json的preLaunchTask，自定義名字，preLaunchTask將引用在 tasks.json 文件中定義的任務。

{// 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文件中定義一個 daprd task和問題匹配器（problem matcher）。這里有兩個通過上述 preLaunchTask 成員引用。在 dpred -frontend task下，還有一個dependsOn成員，它引用build任務，以確保最新的代碼正在運行/調試。用了 problemMatcher，這樣當 daprd 進程啟動和運行時，VSCode 就能夠知道。

{"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"},] }

因為沒有使用?dapr?run* cli 命令， 所以運行 daprd list 命令將不會顯示當前正在運行的應用列表。

3.調試

在StateController.GetAsync中新增斷點，運行并調用http://192.168.43.94:3501/v1.0/invoke/frontend/method/State。

4.不用vscode調試

cmd運行以下命令，監聽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運行項目，即可調試

總結

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