Created
June 10, 2015 07:50
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golang server and client
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| package main | |
| import ( | |
| "fmt" | |
| "html/template" | |
| "io" | |
| "log" | |
| "net/http" | |
| "os" | |
| ) | |
| type String string | |
| type Struct struct { | |
| Greeting string | |
| Punct string | |
| Who string | |
| } | |
| func (s String) ServeHTTP(w http.ResponseWriter, r *http.Request) { | |
| fmt.Fprint(w, s) | |
| } | |
| func (s Struct) ServeHTTP(w http.ResponseWriter, r *http.Request) { | |
| str := fmt.Sprintf("%v%v%v", s.Greeting, s.Punct, s.Who) | |
| fmt.Fprint(w, str) | |
| } | |
| func handlerFunc(w http.ResponseWriter, r *http.Request) { | |
| if r.Method == "GET" { | |
| t, err := template.ParseFiles("login.tpl") | |
| if err != nil { | |
| fmt.Fprintln(w, `Can't find template "login.tpl"`) | |
| return | |
| } | |
| t.Execute(w, nil) | |
| } else { | |
| r.ParseMultipartForm(32 << 20) | |
| fmt.Fprintln(w, r.FormValue("name")) | |
| file, handler, err := r.FormFile("filename") | |
| if err != nil { | |
| fmt.Fprintln(w, err) | |
| return | |
| } | |
| defer file.Close() | |
| fmt.Fprintln(w, handler.Header) | |
| f, err := os.OpenFile("./upload/"+handler.Filename, os.O_CREATE|os.O_WRONLY, 0666) | |
| if err != nil { | |
| fmt.Fprintln(w, err) | |
| return | |
| } | |
| defer f.Close() | |
| io.Copy(f, file) | |
| } | |
| } | |
| func main() { | |
| // your http.Handle calls here | |
| http.Handle("/string", String("I'm a frayed knot.")) | |
| http.Handle("/struct", Struct{"Hello", ":", "Gophers!"}) | |
| http.HandleFunc("/", handlerFunc) | |
| log.Println("server is running on http://localhost:4000/ ") | |
| log.Fatal(http.ListenAndServe("localhost:4000", nil)) | |
| } |
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| package main | |
| import ( | |
| "bytes" | |
| "fmt" | |
| "io" | |
| "io/ioutil" | |
| "mime/multipart" | |
| "net/http" | |
| "os" | |
| "path" | |
| ) | |
| func postFile(filename string, url string) error { | |
| bodyBuffer := &bytes.Buffer{} | |
| bodyWriter := multipart.NewWriter(bodyBuffer) | |
| fileWriter, err := bodyWriter.CreateFormFile("filename", path.Base(filename)) | |
| if err != nil { | |
| fmt.Println("error writing to buffer") | |
| return err | |
| } | |
| fh, err := os.Open(filename) | |
| if err != nil { | |
| fmt.Println("error opening file") | |
| return err | |
| } | |
| defer fh.Close() | |
| _, err = io.Copy(fileWriter, fh) | |
| if err != nil { | |
| return err | |
| } | |
| contentType := bodyWriter.FormDataContentType() | |
| bodyWriter.Close() | |
| resp, err := http.Post(url, contentType, bodyBuffer) | |
| if err != nil { | |
| return err | |
| } | |
| defer resp.Body.Close() | |
| resp_body, err := ioutil.ReadAll(resp.Body) | |
| if err != nil { | |
| return err | |
| } | |
| fmt.Println(resp.Status) | |
| fmt.Println(string(resp_body)) | |
| return nil | |
| } | |
| func main() { | |
| url := "http://localhost:4000" | |
| file := "C:/Users/Public/Pictures/Sample Pictures/Koala.jpg" | |
| postFile(file, url) | |
| } |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>File input</title> | |
| </head> | |
| <body> | |
| <form action="/" method="post" enctype="multipart/form-data"> | |
| <label>Name:</label> | |
| <input name="name" /> | |
| <p></p> | |
| <input type="file" name="filename" /> | |
| <p> | |
| <input type="submit" value="Submit" /> | |
| </p> | |
| </body> | |
| </html> |
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