how can I use golang.org/x/net/context in func xxx(c *gin.Context)?

[ynqa]

As executing gin applications, I just use golang.org/x/net/context for async process, such as sending logs with fluentd, or r/w databases. So I create ctx := context.Background(), but I cloud not call it because gin.GET(func)'s func has only one arg: *gin.Context, cloud not include ctx (= context.Context).

[ramoas]

@ynqa Currently, it looks like the gin.Context implements the context.Context interface in a very basic manner (no deadline, no done channel, no done error, but can get the request and values):
https://github.com/gin-gonic/gin/blob/master/context.go#L543-L568

Thus, it seems like you can only directly pass a gin.Context into code that expects a context.Context, not vice versa. You should also be able to derive a context.Context from a gin.Context.

From history, it looks like the gin experimentation with / introduction of context.Context occurred in May 2015, just before 1.0rc1.

If anyone has experience bridging / mixing gin.Context with context.Context, please share.

[ynqa]

@ramoas Thank you for your reply. I see... that we have to use them in combination.
So, I make a mixing gin.Context with context.Context middleware by the reference econtext, and here: https://gist.github.com/ynqa/78e7889a313f67d4a5d0f77e56fa506d

if you use it, please write below:

g := gin.Default()
ctx := context.Background()
// you can put some processes into `ctx`
...
g.Use(middleware.Middleware(ctx))

Also you can call context.Context from FromContext(c *gin.Context).
I would appreciate it very much if you could point out anything to me!!