Section 8 of 12

HTTP Servers & Clients

Build web servers and make HTTP requests

Course Progress

Section 8 of 12

67% complete

Tutorials

HTTP Servers

Go's net/http package makes it easy to build web servers with minimal overhead.

Code Examples

Basic HTTP Servergo
package main

import (
    "fmt"
    "net/http"
)

func helloHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello, %s!\n", r.URL.Path[1:])
}

func main() {
    http.HandleFunc("/", helloHandler)
    
    fmt.Println("Server starting on :8080")
    http.ListenAndServe(":8080", nil)
}
Multiple Routesgo
package main

import (
    "fmt"
    "net/http"
    "encoding/json"
)

type Response struct {
    Message string `json:"message"`
    Status  string `json:"status"`
}

func homeHandler(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("Content-Type", "text/html")
    fmt.Fprintf(w, "<h1>Welcome</h1>")
}

func apiHandler(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("Content-Type", "application/json")
    resp := Response{Message: "Hello API", Status: "ok"}
    json.NewEncoder(w).Encode(resp)
}

func main() {
    http.HandleFunc("/", homeHandler)
    http.HandleFunc("/api", apiHandler)
    
    http.ListenAndServe(":8080", nil)
}

HTTP Clients

Make HTTP requests from Go to consume APIs and services.

Code Examples

HTTP Requestsgo
package main

import (
    "fmt"
    "io/ioutil"
    "net/http"
)

func main() {
    // GET request
    resp, err := http.Get("https://api.github.com/users/golang")
    if err != nil {
        fmt.Println(err)
    }
    defer resp.Body.Close()
    
    body, _ := ioutil.ReadAll(resp.Body)
    fmt.Println(string(body))
    
    // POST request
    resp, _ = http.Post("https://api.example.com/data",
        "application/json",
        strings.NewReader(`{"key":"value"}`))
    defer resp.Body.Close()
}

Exercises

REST API Server

Create a simple REST API server with GET and POST endpoints

INTERMEDIATE

Starter Code:

package main

import (
    "fmt"
    "net/http"
    "encoding/json"
)

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

func main() {
    // TODO: Create REST API endpoints
}

Hands-on Project

Todo API

Build a complete Todo REST API with CRUD operations

ADVANCED

Learning Objectives

  • >Build REST APIs
  • >Handle JSON
  • >Implement CRUD operations

Project Tips

  • > Start by understanding the requirements
  • > Break the project into smaller tasks
  • > Test your code frequently as you build
  • > Add error handling throughout your code
  • > Consider edge cases and validate inputs
  • > Document your code with comments
File I/O & PackagesHOMEDatabase Integration