Golang网络编程-RESTFUL方法

淡淡的烟草味﹌ 2023-06-15 14:26 8阅读 0赞

### 案例一、极简WEB服务：HelloWeb.go ###

package main
    
    import (
    	"fmt"
    	"net/http"
    )
    
    func handler(writer http.ResponseWriter, request *http.Request) {
    	fmt.Fprintf(writer, "Hello Web, %s!", request.URL.Path[1:])
    }
    
    func main() {
    	http.HandleFunc("/", handler)
    	http.ListenAndServe(":9090", nil)
    }

### 案例二、RESTFUL方法（GET）：Get.go ###

package main
    
    import (
    	"fmt"
    	"io/ioutil"
    	"net/http"
    	"os"
    )
    
    func myGet() {
    	client := &http.Client{}
    	request, err := http.NewRequest("GET", "https://www.baidu.com", nil)
    	if err != nil {
    		fmt.Println("Error: ", err)
    		os.Exit(1)
    	}
    
    	respose, err := client.Do(request)
    	defer respose.Body.Close()
    
    	cookies := respose.Cookies()
    	fmt.Println(cookies)
    	if body, err := ioutil.ReadAll(respose.Body); err != nil {
    		fmt.Println("Err:", err)
    		os.Exit(2)
    	} else {
    		fmt.Println(string(body))
    		//fmt.Println(json.Decoder{})
    	}
    }
    
    func main() {
    	myGet()
    }

### 案例三、RESTFUL方法（GET）返回JSON串：GetPostman.go ###

package main
    
    import (
    	"fmt"
    	"io/ioutil"
    	//"os"
    	//"path/filepath"
    	"net/http"
    )
    
    func main() {
    
    	url := "https://postman-echo.com/get?foo1=bar1&foo2=bar2"
    	method := "GET"
    
    	client := &http.Client {
    		//CheckRedirect: func(req *http.Request, via []*http.Request) error {
    		//	return http.ErrUseLastResponse
    		//},
    	}
    	req, err := http.NewRequest(method, url, nil)
    
    	if err != nil {
    		fmt.Println(err)
    	}
    	res, err := client.Do(req)
    	defer res.Body.Close()
    	body, _ := ioutil.ReadAll(res.Body)
    
    	fmt.Println(string(body))
    }

### 案例四、RESTFUL方法（POST）返回JSON串：PostForm.go ###

package main
    
    import (
    	"fmt"
    	"strings"
    	"net/http"
    	"io/ioutil"
    )
    
    func main() {
    
    	url := "https://postman-echo.com/post"
    	method := "POST"
    
    	payload := strings.NewReader("foo1=bar1&foo2=bar2")
    
    	client := &http.Client {
    		CheckRedirect: func(req *http.Request, via []*http.Request) error {
    			return http.ErrUseLastResponse
    		},
    	}
    	req, err := http.NewRequest(method, url, payload)
    
    	if err != nil {
    		fmt.Println(err)
    	}
    	res, err := client.Do(req)
    	defer res.Body.Close()
    	body, err := ioutil.ReadAll(res.Body)
    
    	fmt.Println(string(body))
    }

### 案例五、RESTFUL方法（POST）返回JSON串：PostRaw.go ###

package main
    
    import (
    	"fmt"
    	"strings"
    	"io/ioutil"
    	"net/http"
    )
    
    func main() {
    
    	url := "https://postman-echo.com/post"
    	method := "POST"
    
    	payload := strings.NewReader("This is expected to be sent back as part of response body.")
    
    	client := &http.Client{}
    	req, err := http.NewRequest(method, url, payload)
    
    	if err != nil {
    		fmt.Println(err)
    	}
    	res, err := client.Do(req)
    	defer res.Body.Close()
    	body, err := ioutil.ReadAll(res.Body)
    
    	fmt.Println(string(body))
    }