Golang---The use of panic and recover

This is a creation in Article, where the information may have evolved or changed.

In the golang of the wrong handling, I here is the summary of their own practice.

1. Log the error messages to the logs

2, panic, and then use the Recover function for exception capture. (I'm just doing a simple example to record this usage.)

function A calls function B, where you can use recover in function A or in function B

Code to save log information to the log ****************************

Write data to the login log

FileName: The file name to save the log to

Content: What to add to the log

Funcwrite_user_info (filename,contentstring) {

File,err: = os. OpenFile (Filename,os. O_append|os. O_rdwr|os. o_create,0666)

Iferr! = Nil {

Log. Println ("Open file failed ...", err)

Return

}

Deferfile. Close ()

Usr_time: = time. Now (). Format ("2006-01-02 15:04:05")

Content = Fmt. Sprint (Usr_time, "", Content, "\ r \ n")

_,err = file. WriteString (content)

Iferr! = Nil {

Log. Println ("Write data to log failed ...", err)

Return

}

}

Using the panic and recover functions ****************************

Functest_painc (T *testing. T) {

Log. Println (GetInt ())

}

Funcgetint () int{

Defer func () int{

Iferr: =recover (); Err! = Nil {

Log. PRINTLN (ERR)

}

Log. Println ("Recover........continue")

Return3

}()

Log. Println ("Begin...........begin")

Panic ("Hello Panic")

}