How to use file method of http Package

Best K6 code snippet using http.file

fileServer.go

Source:fileServer.go

...30	}31	return32}33// æ¥åä¸ä¸ªpostè¯·æ±ï¼å°ä¸»ä½ä¸çæä»¶ä¿åä¸æ¥ï¼è¿åä¸ä¸ªä¸è½½é¾æ¥,æ¯æ¬¡ä»æ¯æä¸ä¼ åä¸ªæä»¶34// Exampleï¼curl -F 'file=@default.conf' http://localhost:80/static/upload35func staticUploadHandler(w http.ResponseWriter, r *http.Request) {36	if r.Method != http.MethodPost {37		logs.Warn("UploadFile() receive bad request: %v", r)38		fmt.Fprint(w, "demo: curl -F 'file=@default.conf' http://localhost:80/upload")39		return40	}41	var err error42	defer func() {43		if err != nil {44			fmt.Fprintf(w, "Error happen: %v", err)45		}46	}()47	r.ParseForm()48	logs.Info("%+v", r)49	err = r.ParseMultipartForm(5 << 20)50	if err != nil {51		logs.Error(err)52		return53	}54	// æç»ä¸ä¼ å¤ä¸ªæä»¶çè¯·æ±55	if size := len(r.MultipartForm.File); size != 1 {56		err = fmt.Errorf("Reject because size of multipartForm is %d", size)57		logs.Warn(err)58		return59	}60	for _, files := range r.MultipartForm.File {61		// è§£æè¡¨å62		if size := len(files); size != 1 {63			err = fmt.Errorf("Reject because size of fileHeader is %d", len(files))64			return65		}66		header := files[0]67		logs.Info("name=%s  size=%d", header.Filename, header.Size)68		var file multipart.File69		file, err = header.Open()70		if err != nil {71			logs.Error("open upload file fail: %v", err)72			return73		}74		defer file.Close()75		// ä¿åæä»¶å°æ¬å°ï¼ååååä¸ºéæºï¼é¿åº¦ä¸º876		var cur *os.File77		randName := tb.GetRandomString(8)78		filePath := fmt.Sprintf("%s%s.tmp", config.ServerConfig.StaticPath, randName)79		cur, err = os.Create(filePath)80		if err != nil {81			logs.Error("create file fail: %v", err)82			return83		}84		defer cur.Close()85		var size int6486		size, err = io.Copy(cur, file)87		if err != nil {88			return89		}90		// è®°å½ä¸ä¼ è®°å½å°mongo91		err = model.InsertUploadRecord(header.Filename, randName, size)92		if err != nil {93			logs.Error("save upload file record fail: err=%v", err)94			break95		}96		downloadUrl := fmt.Sprintf("%s/static/download/%s", config.ServerConfig.ServerURL, randName)97		previewUrl := fmt.Sprintf("%s/static/preview/%s.tmp", config.ServerConfig.ServerURL, randName)98		fmt.Fprintf(w,99			"\n Save file success: size=%d name=%s\n browser_download_url:  %s\n browser_preview_url: %s\n command_download_url:  wget --no-check-certificate --content-disposition %s \n",100			size, header.Filename, downloadUrl, previewUrl, downloadUrl)101	}102	return103}104// ä»¥å¼¹çªä¸è½½æ¹å¼è¿åstaticUploadHandlerä¸ä¼ çæä»¶105// Example: wget --no-check-certificate http://localhost:80/download/abcdefgddd106func staticDownloadHandler(w http.ResponseWriter, r *http.Request) {107	var err error108	if r.Method != http.MethodGet {109		w.WriteHeader(http.StatusMethodNotAllowed)110		logs.Warn("DownloadFile reeceive a bad request: %v", r)111		return112	}113	url := strings.Trim(fmt.Sprint(r.URL), "/") // åä»¶ç å¿é¡»æ£å¥½ä¸º10ä¸ªå°ååæ¯114	if !regexp.MustCompile("^static/download/[a-z]{8}$").MatchString(url) {115		w.WriteHeader(http.StatusBadRequest)116		logs.Warn("unexpect url: %s", r.URL)117		return118	}119	code := url[16:] // åä»¶ç 120	filePath := fmt.Sprintf("%s%s.tmp", config.ServerConfig.StaticPath, code)121	if !tb.CheckFileExist(filePath) {122		logs.Info("file not exist: path=%s", filePath)123		fmt.Fprintf(w, "file not exist")124		return125	}126	var record model.FileUpload127	record, err = model.GetUploadRecord(code)128	if err != nil {129		logs.Info("record not found: path=%s  err=%v", filePath, err)130		fmt.Fprintf(w, "file record not found: %v", err)131	}132	err = tb.ServerFile(w, filePath, record.FileName, record.Size)133	if err != nil {134		logs.Error("ServerFile fail: %v", err)135		fmt.Fprintf(w, "Error happen: %v", err)136		return137	}138	logs.Info("Server file success: %+v", record)139}140// ä»¥é¢è§æ¹å¼è¿åStaticPathç®å½ä¸çå¾ççèµæº141// url format: /static/preview/${fileName}142func staticPreViewHandler(w http.ResponseWriter, r *http.Request) {143	var err error144	if r.Method != http.MethodGet {145		w.WriteHeader(http.StatusMethodNotAllowed)146		logs.Warn("DownloadFile reeceive a bad request: %v", r)147		return148	}149	uri := strings.Trim(fmt.Sprint(r.URL), "/")150	uri, _ = url.QueryUnescape(uri)151	fileName := strings.TrimPrefix(uri, "static/preview/")152	filePath := config.ServerConfig.StaticPath + fileName153	logs.Info("get static path: %s", filePath)154	fileInfo, err := os.Stat(filePath)155	if err != nil {156		logs.Info("stat file fail: error=%v filePath=%s", err, filePath)157		w.WriteHeader(http.StatusNotFound)158		return159	}160	if fileInfo.IsDir() {161		logs.Warn("filePath is a floder: path=%s", filePath)162		w.WriteHeader(http.StatusNotFound)163		return164	}165	http.ServeFile(w, r, filePath)166	return167}...

upload.go

Source:upload.go

...8)9var (10	MaxUploadFileLength = 16e311)12// Upload allows uploading go file, builds it as a plugin and returns url path that runs it.13func Upload(rw http.ResponseWriter, r *http.Request) {14	if r.ContentLength > int64(MaxUploadFileLength) {15		http.Error(rw, "max upload file length exceeded", http.StatusBadRequest)16		return17	}18	name, ok := tryGetName(rw, r)19	if !ok {20		return21	}22	dir, goFile, soFile, ok := tryGetDir(rw, name)23	if !ok {24		return25	}26	if !tryMakeDirAll(rw, dir) {27		return28	}29	if !tryUpload(rw, r, goFile) {30		return31	}32	if !tryBuild(rw, goFile) {33		return34	}35	main, ok := tryLookup(rw, soFile)36	if !ok {37		return38	}39	pluginsMutex.Lock()40	defer pluginsMutex.Unlock()41	plugins[name] = main42}43func tryGetName(rw http.ResponseWriter, r *http.Request) (name string, ok bool) {44	name = r.URL.Path[len("/upload"):]45	if name == "" {46		http.Error(rw, "usage /upload/example", http.StatusBadRequest)47		return "", false48	}49	return name, true50}51func tryGetDir(rw http.ResponseWriter, name string) (dir, goFile, soFile string, ok bool) {52	wd, err := os.Getwd()53	if err != nil {54		log.Printf("unable to get working directory: %v", err)55		rw.WriteHeader(http.StatusInternalServerError)56		return "", "", "", false57	}58	s := path.Join(wd, name)59	dir = path.Dir(s)60	goFile = s + ".go"61	soFile = s + ".so"62	ok = true63	return64}65func tryMakeDirAll(rw http.ResponseWriter, dir string) bool {66	err := os.MkdirAll(dir, 0755)67	if err != nil {68		log.Printf("unable to create directory %q: %v", dir, err)69		rw.WriteHeader(http.StatusInternalServerError)70		return false71	}72	return true73}74func tryUpload(rw http.ResponseWriter, r *http.Request, goFile string) bool {75	f, err := os.Create(goFile)76	if err != nil {77		log.Printf("unable to create file %q: %v", goFile, err)78		rw.WriteHeader(http.StatusInternalServerError)79		return false80	}81	written, err := io.CopyN(f, r.Body, int64(MaxUploadFileLength))82	if err != nil && err != io.EOF {83		log.Printf("unable to copy request body: %v", err)84		// TODO BadRequest or InternalServerError85		http.Error(rw, "unable to upload file", http.StatusInternalServerError)86		return false87	}88	log.Printf("file %q (%d) uploaded", goFile, written)89	return true90}91func tryChdir(rw http.ResponseWriter, dir string) bool {92	// TODO there should be no need for changing working directory93	cur, err := os.Getwd()94	if err != nil {95		log.Printf("unable to get working directory: %v", err)96		rw.WriteHeader(http.StatusInternalServerError)97		return false98	}99	if cur != dir {100		err = os.Chdir(dir)101	}102	if err != nil {...

httpfs.go

Source:httpfs.go

1// Copyright 2013 The Go Authors. All rights reserved.2// Use of this source code is governed by a BSD-style3// license that can be found in the LICENSE file.4// Package httpfs implements http.FileSystem using a godoc vfs.FileSystem.5package httpfs // import "golang.org/x/tools/godoc/vfs/httpfs"6import (7	"fmt"8	"io"9	"net/http"10	"os"11	"golang.org/x/tools/godoc/vfs"12)13func New(fs vfs.FileSystem) http.FileSystem {14	return &httpFS{fs}15}16type httpFS struct {17	fs vfs.FileSystem18}19func (h *httpFS) Open(name string) (http.File, error) {20	fi, err := h.fs.Stat(name)21	if err != nil {22		return nil, err23	}24	if fi.IsDir() {25		return &httpDir{h.fs, name, nil}, nil26	}27	f, err := h.fs.Open(name)28	if err != nil {29		return nil, err30	}31	return &httpFile{h.fs, f, name}, nil32}33// httpDir implements http.File for a directory in a FileSystem.34type httpDir struct {35	fs      vfs.FileSystem36	name    string37	pending []os.FileInfo38}39func (h *httpDir) Close() error               { return nil }40func (h *httpDir) Stat() (os.FileInfo, error) { return h.fs.Stat(h.name) }41func (h *httpDir) Read([]byte) (int, error) {42	return 0, fmt.Errorf("cannot Read from directory %s", h.name)43}44func (h *httpDir) Seek(offset int64, whence int) (int64, error) {45	if offset == 0 && whence == 0 {46		h.pending = nil47		return 0, nil48	}49	return 0, fmt.Errorf("unsupported Seek in directory %s", h.name)50}51func (h *httpDir) Readdir(count int) ([]os.FileInfo, error) {52	if h.pending == nil {53		d, err := h.fs.ReadDir(h.name)54		if err != nil {55			return nil, err56		}57		if d == nil {58			d = []os.FileInfo{} // not nil59		}60		h.pending = d61	}62	if len(h.pending) == 0 && count > 0 {63		return nil, io.EOF64	}65	if count <= 0 || count > len(h.pending) {66		count = len(h.pending)67	}68	d := h.pending[:count]69	h.pending = h.pending[count:]70	return d, nil71}72// httpFile implements http.File for a file (not directory) in a FileSystem.73type httpFile struct {74	fs vfs.FileSystem75	vfs.ReadSeekCloser76	name string77}78func (h *httpFile) Stat() (os.FileInfo, error) { return h.fs.Stat(h.name) }79func (h *httpFile) Readdir(int) ([]os.FileInfo, error) {80	return nil, fmt.Errorf("cannot Readdir from file %s", h.name)81}...

file

Using AI Code Generation

1import (2func main() {3	http.HandleFunc("/", index)4	http.Handle("/favicon.ico", http.NotFoundHandler())5	http.ListenAndServe(":8080", nil)6}7func index(w http.ResponseWriter, req *http.Request) {8	fmt.Println(req.Method)9	if req.Method == http.MethodPost {10		f, h, err := req.FormFile("q")11		if err != nil {12			http.Error(w, err.Error(), 500)13		}14		defer f.Close()15		fmt.Println("\tfile:", f, "

file

Using AI Code Generation

1import (2func main() {3	page, _ := ioutil.ReadAll(res.Body)4	res.Body.Close()5	fmt.Printf("%s", page)6}7import (8func main() {9	io.Copy(os.Stdout, res.Body)10	if err := res.Body.Close(); err != nil {11		panic(err)12	}13}14import (15func main() {16	io.Copy(os.Stdout, res.Body)17	if err := res.Body.Close(); err != nil {18		panic(err)19	}20}

file

Using AI Code Generation

1import (2func main() {3    if err != nil {4        fmt.Println("Error: ", err)5    }6    defer resp.Body.Close()7    body, err := ioutil.ReadAll(resp.Body)8    if err != nil {9        fmt.Println("Error: ", err)10    }11    fmt.Println(string(body))12}

file

Using AI Code Generation

1import (2func main() {3    newFile, err := os.Create("newfile.txt")4    if err != nil {5        log.Fatal(err)6    }7    if err != nil {8        log.Fatal(err)9    }10    if response.StatusCode != http.StatusOK {11        log.Fatalf("bad status: %s", response.Status)12    }13    _, err = io.Copy(newFile, response.Body)14    if err != nil {15        log.Fatal(err)16    }17}

file

Using AI Code Generation

1import (2func main() {3    if err != nil {4        fmt.Println(err)5    }6    defer resp.Body.Close()7    body, err := ioutil.ReadAll(resp.Body)8    if err != nil {9        fmt.Println(err)10    }11    fmt.Println(string(body))12}13import (14func main() {15    if err != nil {16        fmt.Println(err)17    }18    defer resp.Body.Close()19    body, err := ioutil.ReadAll(resp.Body)20    if err != nil {21        fmt.Println(err)22    }23    fmt.Println(string(body))24}25import (26func main() {27    if err != nil {28        fmt.Println(err)29    }30    defer resp.Body.Close()31    body, err := ioutil.ReadAll(resp.Body)32    if err != nil {33        fmt.Println(err)34    }35    fmt.Println(string(body))36}37import (38func main() {39    if err != nil {40        fmt.Println(err)41    }42    defer resp.Body.Close()43    body, err := ioutil.ReadAll(resp.Body)44    if err != nil {45        fmt.Println(err)46    }47    fmt.Println(string(body))48}49import (50func main() {51    if err != nil {52        fmt.Println(err)53    }54    defer resp.Body.Close()55    body, err := ioutil.ReadAll(resp.Body)56    if err != nil {57        fmt.Println(err)58    }59    fmt.Println(string(body))60}61import (

file

Using AI Code Generation

1import (2func main() {3	f, err := os.Open("newfile.txt")4	if err != nil {5		log.Fatal(err)6	}7	defer f.Close()8	if err != nil {9		log.Fatal(err)10	}11	defer resp.Body.Close()12	n, err := io.Copy(f, resp.Body)13	if err != nil {14		log.Fatal(err)15	}16	log.Println("Copied", n, "bytes")17}18import (19func main() {20	if err != nil {21		log.Fatal(err)22	}23	defer resp.Body.Close()24	f, err := os.Create("newfile.txt")25	if err != nil {26		log.Fatal(err)27	}28	defer f.Close()29	n, err := io.Copy(f, resp.Body)30	if err != nil {31		log.Fatal(err)32	}33	log.Println("Copied", n, "bytes")34}35import (36func main() {37	if err != nil {38		log.Fatal(err)39	}40	defer resp.Body.Close()41	f, err := os.Create("newfile.txt")42	if err != nil {43		log.Fatal(err)44	}45	defer f.Close()46	n, err := io.Copy(f, resp.Body)47	if err != nil {48		log.Fatal(err)49	}50	log.Println("Copied", n, "bytes")51}52import (53func main() {54	f, err := os.Open("newfile.txt")55	if err != nil {56		log.Fatal(err)57	}

file

Using AI Code Generation

1import (2func main() {3	if err != nil {4		fmt.Println(err)5	}6	defer resp.Body.Close()7	file, err := os.Create("1.png")8	if err != nil {9		fmt.Println(err)10	}11	defer file.Close()12	_, err = io.Copy(file, resp.Body)13	if err != nil {14		fmt.Println(err)15	}16}17Download File Using http.Get() Method18import (19func main() {20	if err != nil {21		fmt.Println(err)22	}23	defer resp.Body.Close()

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