I would just register your handler twice. router.Path(“/articles/{id:[0-9]+}”). Queries(“key”, “{[0-9]*?}”). HandlerFunc(YourHandler). Name(“YourHandler”) router.Path(“/articles/{id:[0-9]+}”).HandlerFunc(YourHandler) Here is a working program to demonstrate. Notice that I am using r.FormValue to get the query parameter. Note: make sure you have an up to date version go get -u github.com/gorilla/mux since a bug of query params not getting added the … Read more
Types don’t actually implement generic interfaces, they implement instantiations of generic interfaces. You can’t use a generic type (including interfaces) without instantiation. From there, it is just like pre-generics Go, including the difference between methods with pointer receiver. Therefore it is helpful to think what the methods that use type parameters would look like if … Read more
You can use the type json.Number which is implemented as a string: type User struct { Id json.Number `json:”user_id”` Username string `json:”user_name”` } Then you can simply convert it in any other code: stringNumber := string(userInstance.Id) Playground: https://play.golang.org/p/2BTtWKkt8ai
Match the types of argument to time.Sleep: r := rand.Intn(10) time.Sleep(time.Duration(r) * time.Microsecond) This works because time.Duration has int64 as its underlying type: type Duration int64 Docs: https://golang.org/pkg/time/#Duration
A slice is really just a fancy way to manage an underlying array. It automatically tracks size, and re-allocates new space as needed. As you append to a slice, the runtime doubles its capacity every time it exceeds its current capacity. It has to copy all of the elements to do that. If you know … Read more
If you only want to pass the request body JSON to Redis as a value, then you do not need to bind the JSON to a value. Read the raw JSON from the request body directly and just pass it through: jsonData, err := ioutil.ReadAll(c.Request.Body) if err != nil { // Handle error } err … Read more
With Go1.6, vendoring is built in as you read. What does this mean? Only one thing to keep in mind: When using the go tools such as go build or go run, they first check to see if the dependencies are located in ./vendor/. If so, use it. If not, revert to the $GOPATH/src/ directory. … Read more
In Go no value is safe for concurrent read/write, slices (which are slice headers) are no exception. Yes, your code has data races. Run with the -race option to verify. Example: type myClass struct { AttributeName string } sourceSlice := make([]myClass, 100) destSlice := make([]myClass, 0) var wg sync.WaitGroup for _, myObject := range sourceSlice … Read more
go get requires git if any of the packages lives (and is being fetched) from a git repository. For Windows, you can install git from the git website.
You want a bytes.Buffer, not a bufio.Writer. bytes.Buffer is used when you need a writer that writes to memory. bufio.Writer just caches data in memory before forwarding it to another writer. buf := new(bytes.Buffer) err := jpeg.Encode(buf, new_image, nil) send_s3 := buf.Bytes()