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March 1, 2016 13:43
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| func get(w http.ResponseWriter, r *http.Request) *HTTPError { | |
| // get some logged in user | |
| user := GetUserFromContext(r) | |
| // create error and result channel | |
| errchan := make(chan error, 2) | |
| friendsChan := make(chan []Friend) | |
| CarsChan := make(chan []Cars) | |
| // get friends | |
| go func() { | |
| friends, err := db.GetFriends(user.Name) | |
| if err != nil { | |
| errchan <- err | |
| return | |
| } | |
| friendsChan <- friends | |
| }() | |
| // get cars | |
| go func() { | |
| cars, err := db.GetCars(user.Name) | |
| if err != nil { | |
| errchan <- err | |
| return | |
| } | |
| carsChan <- cars | |
| }() | |
| // define vars here | |
| var friends []Friend | |
| var cars []Car | |
| // collect results from channels | |
| for i:=0; i<2; i++ { | |
| select { | |
| case err := <- errchan: | |
| return &HTTPError{err} | |
| case friends = <- friendsChan: | |
| case cars = <- carsChan: | |
| // just assign the result from the channel so they can be used in the template | |
| } | |
| } | |
| // use `friends` and `cars` to render html template | |
| } |
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