How do I implement pagination for APIs in Go?

Implementing pagination for APIs in Go is essential for managing data efficiently. Pagination allows clients to fetch data in smaller chunks rather than loading everything at once, improving performance and user experience.

pagination, Go API, data management, efficient loading, performance boost


        package main

        import (
            "encoding/json"
            "net/http"
            "strconv"
            "github.com/gorilla/mux"
        )

        type Item struct {
            ID   int    `json:"id"`
            Name string `json:"name"`
        }

        var items []Item

        func main() {
            for i := 1; i <= 100; i++ {
                items = append(items, Item{ID: i, Name: "Item " + strconv.Itoa(i)})
            }

            r := mux.NewRouter()
            r.HandleFunc("/items", getItems).Methods("GET")
            http.ListenAndServe(":8080", r)
        }

        func getItems(w http.ResponseWriter, r *http.Request) {
            pageStr := r.URL.Query().Get("page")
            limitStr := r.URL.Query().Get("limit")

            page, _ := strconv.Atoi(pageStr)
            limit, _ := strconv.Atoi(limitStr)

            if page < 1 {
                page = 1
            }
            if limit < 1 {
                limit = 10 // default limit
            }

            start := (page - 1) * limit
            end := start + limit

            if start >= len(items) {
                start = len(items)
            }
            if end > len(items) {
                end = len(items)
            }

            json.NewEncoder(w).Encode(items[start:end])
        }

How do I implement pagination for APIs in Go?

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How do I implement pagination for APIs in Go?

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