前幾節(jié)開發(fā)Dapr應(yīng)用程序時(shí)，我們使用 dapr cli 來啟動(dòng)dapr服務(wù)，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(diào)試服務(wù)呢？在這里使用 dapr 運(yùn)行時(shí)(daprd) 來幫助實(shí)現(xiàn)這一點(diǎn)。具體原理就是先從命令行中運(yùn)行符合正確參數(shù)的 daprd，然后啟動(dòng)您的代碼并附加調(diào)試器。

1.配置launch.json

vscode打開項(xiàng)目，并創(chuàng)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(wù)。

{// 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(gè) daprd task和問題匹配器（problem matcher）。這里有兩個(gè)通過上述 preLaunchTask 成員引用。在 dpred -frontend task下，還有一個(gè)dependsOn成員，它引用build任務(wù)，以確保最新的代碼正在運(yùn)行/調(diào)試。用了 problemMatcher，這樣當(dāng) daprd 進(jìn)程啟動(dòng)和運(yùn)行時(shí)，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?yàn)闆]有使用?dapr?run* cli 命令， 所以運(yùn)行 daprd list 命令將不會(huì)顯示當(dāng)前正在運(yùn)行的應(yīng)用列表。

3.調(diào)試

在StateController.GetAsync中新增斷點(diǎn)，運(yùn)行并調(diào)用http://192.168.43.94:3501/v1.0/invoke/frontend/method/State。

4.不用vscode調(diào)試

cmd運(yùn)行以下命令，監(jiān)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(yùn)行項(xiàng)目，即可調(diào)試

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