Below is the Go code:
var ( Address = os.Getenv("ADDR") Token = os.Getenv("TOKEN") ) It reads the environment variables in Windows.
On a Windows laptop, I have the privilege to set user variables for my user login only. I created two variables (for the above), but os.Getenv() cannot read the values.
I do not have the privilege to set system variables.
How can I set environment variables in Windows, with my user login?
In Windows, environment variables can be applied in two ways.
Set modifies the current shell's (the window's) environment values, and the change is available immediately, but it is temporary. The change will not affect other shells that are running, and as soon as you close the shell, the new value is lost until such time as you run set again.
cmd> SET ADDR=127.0.0.1 cmd> SET TOKEN=ABCD1234 cmd> SET setx modifies the value permanently, which affects all future shells, but does not modify the environment of the shells already running. You have to exit the shell and reopen it before the change will be available, but the value will remain modified until you change it again.
cmd> setx ADDR "127.0.0.1" cmd> setx TOKEN "ABCD1234" cmd> SET 
WM_SETTINGCHANGE message to top-level windows. This includes instances of the graphical shell Explorer, which in response reloads its environment from the registry. It does not include instances of CMD because it owns no windows, top-level or otherwise. New instances of CMD started from Explorer will inherit the updated environment. Instances started from other existing processes will not. It is not "all future shells".PATH. In particular not in a naive manner that extends %PATH% and sets it back to the system or user registry value. It's possible if we're careful to read and modify the original system or user "Path" value in the registry via reg.exe. There are SO answers that show how to do this, but it's difficult and should probably just be avoided.
You can try using the set method in a terminal in the following way:
set NODE_HOME=C:\Users\359855\Downloads\node-v14.16.0-win-x64 set PATH=%PATH%;%NODE_HOME%; 
If you want to use some user-defined variable in Windows environment, I recommend the library godotenv
go get github.com/joho/godotenv you can set your variable in the .env file in the same directory of the main. go. like
ADDR=127.0.0.1 TOKEN=localhost In your go program, you can use these variable like:
package main import ( "fmt" "log" "os" "github.com/joho/godotenv" ) func main() { err := godotenv.Load() if err != nil { log.Fatal(err) } fmt.Println("ADDR: ", os.Getenv("ADDR")) fmt.Println("TOKEN: ", os.Getenv("TOKEN")) } I don't know if this is the same as yours, but I use: os.environ.get('environment variable').
Also you can add a print(environment variable) and run to check if everything is fine. Let's say the environment variable is SECRET_KEY. You add a print(SECRET_KEY) to your line of code and run, check your terminal for possible results.
SET key=valuefrom the command line) so you could do that before script invocation.