I have an existing set of functions in an Azure Functions App written in C# Script. I've downloaded the zip file from the Azure portal and opened the directory in Visual Code. I can also log on to the Azure account from Visual Code and can see the functions. If I right-click, I get options to start and stop streaming logs
However, I don't know how to configure my environment so that I can edit and debug these functions locally. I've found instructions for creating a new Function App, but haven't found ones that describe how to work with an existing app.
As mentioned in this post, for now we can't debug(add break points to) C# script(.csx) functions in VS Code.
We can only run csx function both on Azure and locally. Open the function app folder in VS code, follow steps below.
Check function runtime version(~1 or ~2) and follow tutorial to install Azure Function core tools.
If we use ~2 runtime, you need to register binding extensions for all triggers/in/output except Http and Timer triggers.
If we want to use settings(like AzureWebJobsStorage) in Application settings, copy them into local.settings.json. Or we can right click on Application settings of the Function app in VS Code, click Download Remote Settings(In this way, some invalid settings for local env are downloaded as well).
Input Ctrl+` to open terminal and input func host start in terminal to run functions.
For local dev, I do recommend you to use C# pre-compiled code instead of C# script, which is much easier to work with. To do this transformation, follow this tutorial, new a c# function app locally, copy your code in .cs files. We basically don't need to modify the logic code except adding some package and namespace references.
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I had developed azure function solution in Visual Studio 2019 and deployed to azure function by downloading publisher .
But accidently I had deleted entire source code in local machine where I could not get even from "recovery software tools" also.
is there any way can I get source code files from azure function development tools in azure portal? or local machine C drive?
If you open up the Azure Function App Service and navigate to the "Functions" section you will be able to open your individual functions and then select the "Code + Test" section and be able to see your function
I don't know if the type of Function you developed impacts your ability to see this source code or not.
When you deployed through Visual Studio, the source was compiled locally and only the DLLs were uploaded. Thus, you cannot directly see your code. However, you can get to your DLLs and download those. Then you should be able to use any decompiler to see your source code again (maybe not as pretty as originally...).
Go to the SCM console to see and download all files: https://{YOURFUNCTIONNAME}.scm.azurewebsites.net/dev/wwwroot/
I have written an Azure Function App by using the User Interface of Azure Portal. The code is written in C#.
Now, I want to:
download all of the relevant code and configuration files of this
function app
Create an IDE project (e.g. IntelliJ, Visual Studio Code, ...)
store it in a git repository
Deploy the code from IDE or command line to Azure and thereby replacing the previously written Azure function.
So far, I have found only documentation on how to initiate Azure function projects with no previous code. Does somebody know how to do above?
Yes, you could go to your function Overview page, click on Download app content as shown below.
And in your situation, you want configuration files, so select the Content and Visual Studio Project and Include app settings in the download. What is app settings? This will include a local.settings.json file which contains your application settings.
Also the third party .dlls are included.
In the VS, select the folder and it will be working.
Update:
Open the function with vs, then just right click the function and choose Publish, it will show you the publish page. Click start, then you will be able to publish it to a existing Function.
Follow this Setting up a CI/CD pipeline for Azure Functions doc which explain each step in detail.
I have a Function Apps created via Portal, another one created by visual studio. The latter one cause both apps to become read only, with message below:
Your app is currently in read-only mode because you have published a
generated function.json. Changes made to function.json will not be
honored by the Functions runtime
Is this feature correct?
VS: 15.8.5
Yes, this is by design. Function Apps you mentioned should be called functions in one same Function app.
You create a Function app and a function on portal, then in VS you actually also create a Function app instead of a separate function. After you publish this pre-compiled Function app to the one with some existing functions, Azure thinks you want to use the new published one, so it sets the app to be read-only as we can't modify pre-compiled assets on portal unless we republish our code.
This action is by design because one Function app(with functions inside) is handled as a complete unit. So apparently it's not recommended to mix online development with pre-complied one.
Two choices for you to refer.
Remove existing functions in the app. Check Remove additional files at destination when publishing from VS.
Create another Function app.
There are risks that mixing online and pre-compiled code from VS, for example
Name restriction. Functions created online will be overwritten if we publish functions with same names.
We can't check Remove additional files at destination even though some pre-complied dlls published before have been useless.
If it's only for test or there's no worry about potential risks, just change Function app edit mode to readwrite in Function app settings or add FUNCTION_APP_EDIT_MODE readwrite in Application settings.
I'm new to Azure Functions and been thrown into a project without a proper introduction and anybody I could ask is out of office. My simple most likely stupid question is; where can I find the actual code?
In the azure portal, the functions are listed as "read-only" and only contains a function.json. The resource is an App Service and it has a couple of functions. There is no link to any git repository in properties.
Read-only Functions would be compiled and published (e.g. through Visual Studio or a CI/CD pipeline.) The Azure Functions Portal engineers are working on a new, improved experience for this but for now, if your Function app has a deployment source configured, you can view it from the Portal in two ways from your Function app:
Platform Features > Deployment Options.
Platform Features > Resource Explorer. In the file tree on the lefthand side, find your Function app's name, and under that, sourcecontrols. Click to expand in the righthand window.
If your Function app doesn't have a deployment source configured (e.g. your team has been publishing code manually) then things get harder. Depending on how your company has set up their source control and what you already have access to, the function.json you see might help: the entryPoint property in a build-generated function.json will give you the full assembly name of that function (e.g. VSSample.HelloSequence.Run). That or the assembly name of the uploaded DLL in the scriptfile property might help you locate the project.
Good luck! Keep posting if you have further questions; we're here to help.
AFAIK, if we create the azure function in the Visual Studio and publish it to Azure(there may be other ways), it will appear in the situation you described like the screenshot.
Actually, the code is existing in the portal, but the code has been compiled, you could access it in the Platform features -> Advanced tools (Kudu) -> Debug console.
If you want to get the .cs file, I think you should ask it for your coworkers, there will not be in azure.
You said that the Azure function is listed as "read-only". Did you check from the Application Settings menu if you can change the Azure function app edit mode to Read/Write?
I have created an Azure function. Can i debug Azure Functions on Azure portal without visual studio?
I am passing a complex parameter as File Model, i have to see what's coming in parameter value in debug mode?
There is no debug experience in the portal. Constrained to just the portal, you'll have to use log output to debug.
You might also look into the Azure Functions CLI which provides a local debugging experience. it doesn't require VS.
For Azure Functions V1, you can attach debugger then debug from Visual Studio as the code runs inside csx script:
https://markheath.net/post/remote-debugging-azure-functions
For Azure Functions V2, It seems there is no way till now but you can get massive logs and analytics based on your need.
Or may be you can find a way by uploading the debug version contains (.pdb files) and try to attach debugger. Check this:
https://github.com/Azure/Azure-Functions/issues/872
And i opened an issue here to ask about this:
https://github.com/Azure/Azure-Functions/issues/1051
I have another easiest solution It may feet in your issue or may not, I faced a situation that i want to test azure function webhook but that wouldn't work with localhost so the only solution for me is to test it after publishing and for that i was in need for debug on azure itself but there is another brilliant solution:
You can expose your localhost urls to the public by using many services and for example:
https://localtunnel.github.io/www/
Make sure that you installed nodejs, and follow the instructions to install the localtunel package globally through npm and then you can generate a public url for your localhost webhook so you can verify it against any third party and debug it.
Through Azure Functions Portal you won't able to have debugging tools for do that.
But you can you some ways to debug your azure functions:
1º) Remote debugging using Visual Studio IDE;
2º) Local Debugging using both Visual Studio or VS Code, too;
3º) Event though you're using Azure Functions CLI, you'll need some IDE, that is Visual Studio or VS Code;
The only way that there is on Azure Functions Portal to have something like a debugging is the LOG Window that is localized right below Function Code Window.