Set query parameters for HTTP requests using Golang

To set query parameters for HTTP requests in Go, you can use the http.Request.URL.Query().Set() method, which accepts query parameter names and values ​​as parameters. Specific steps include: Create a new HTTP request. Set query parameters using the Query().Set() method. Encode the request. Execute the request. Get the value of a query parameter (optional). Remove query parameters (optional).

Setting query parameters for HTTP requests using Go

Setting query parameters for HTTP requests in Go is very simple. You just need to use the http.Request.URL.Query().Set() method. This method accepts two parameters: the query parameter name and value to be set. For example, to set the page query parameter to 3 for a request, you would use the following code:

func main() {
    client := &http.Client{}

    req, _ := http.NewRequest("GET", "http://example.com", nil)
    q := req.URL.Query()
    q.Set("page", "3")
    req.URL.RawQuery = q.Encode()

    resp, err := client.Do(req)
    if err != nil {
        log.Fatal(err)
    }

    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println(string(body))
}

The above code snippet creates a new HTTP request and then uses Query(). The Set() method sets the page query parameters. It then encodes the request and executes it using http.Client.

Here are some other examples:

• To set multiple query parameters, you can use the q.Add() method. For example, to set the page query parameter to 3 and the sort query parameter to asc, you would use the following code:

q.Add("page", "3")
q.Add("sort", "asc")

• To get the value of the query parameter, you can use the q.Get() method. For example, to get the value of the page query parameter, you can use the following code:

page := q.Get("page")

• To delete the query parameter, you can use q.Del() method. For example, to remove the page query parameter, you would use the following code:

q.Del("page")

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