Golang Implement image upload

This is a creation in Article, where the information may have evolved or changed. # # Golang Implementation image upload this code for the use of Beego to achieve front-end image upload. Words don't say much, directly on the code. # # # # 1. Front-end Code HTML code: ~ ~ ~ <div class= "col-5 f-l text Text-r" > background (required):</div> <div class= "Img-box" > < label> <span class= "copy-btn hui-iconfont" >& #xe679;</span> <input type= "file" class= "Up-file" > </label> </div> <div class= "Img-file col-offset-5" > </div>~~~js code: A. Read the image code for display on the page. ~~~javascript//Read Picture function loadimg () {//Get file var = $ (". Up-file") [0].files[0];//Create object to read file var reader = new Filereade R (); Create file read related variables var imgfile; Set event reader.onload=function for file read successfully (e) {var e=window.event| | E Imgfile = E.target.result; Console.log (Imgfile); $ (". Img-file"). CSS ({' Background ': "url (" +imgfile+ ")"} "); Isimg (); }; Formally read file reader.readasdataurl (files);} ~~~b. Verify that there is a picture present ~~~javascript//whether there is a picture validation function isimg () {var img= $ (". Img-file"). CSS (' background-image '); Img.indexof ("Data:image") ==-1&&img.indexof (". jpg") ==-1) {$ (". Mess"). HTML ("Add background picture"). CSS ("opacity",1); return false; } else{$ (". Mess"). CSS ("opacity", 0). html (""); return true; }}~~~c. Submit the upload, the image is Base64 encoded to the backend ~~~javascriptfunction AddData () {var url=$ (". Img-file"). CSS ("Background-image"); var data1=[{"name": "url", "Value": url}]; $.ajax ({url: "/commmethod/method/uploadimg", Data:data1, type: "Post", ContentType: "Application/json", Success: function (RESP) {...}}); ~~~#### 2. Backend Code ~~~gofunc (this *commmethodcontroller) uploadimg () {fileurl: = this. GetString ("url") Dataarr: = Strings. Split (FileURL, ",")//Remove wrapper, get to base64 encoded IMGBASE64: = Dataarr[1][:len (Dataarr[1])-2]//base64 transcode IMGs, err: = base64. Stdencoding.decodestring (IMGBASE64) if err! = Nil {Beego. Error ("Base64 decode Error:", err)}timenow: = time. Now (). Unix () file, err: = OS. OpenFile ("./static/img/" +strconv. Formatint (TimeNow, +) + ". jpg", OS. O_create|os. O_wronly, 0644) if err! = Nil {Beego. Debug ("Create File Error:", err)}w: = Bufio. Newwriter (file)//Create New Writer Object _, Err3: = W.writestring (String (IMGs)) if ERR3! = nil {Beego. Error ("Write ErroR: ", ERR3)}w.flush () defer file. Close () Imgname: = StrConv. Formatint (TimeNow) + ". jpg" T: = struct {ImageName string ' JSON: "ImageName" '}{imgname}this. data["json"] = tthis. Servejson ()}/*** This code is mainly used to edit the picture, delete the original picture * Determine if the file exists return true does not exist return false */func checkfileisexist (filename string) bool {var ex ist = Trueif _, Err: = OS. Stat (filename); Os. Isnotexist (err) {exist = False}return exist}~~~ The demo uses native JS and the image is transmitted via Base64 encoding. > If a small partner disagrees with the code or advises, please follow the "today's headline" Account "<font color=red> programming Practitioner </font>". We discuss together, study together, welcome harassment 1032 reads