推送二维码给客户端
尝试将登录屏幕设置为 WhatsApp，将二维码推送到客户端进行扫描，因此我编写了以下服务器代码：
<html>
<head></head>
<body>
note: <span id="content"></span><br>
<img id="photo" style="display: block;-webkit-user-select: none;">
</body>
<script>
/* (function(){
document.getElementById("content").innerHTML='<object type="text/html" data="http://localhost:9999/" ></object>';
})();
*/
const myRequest = new Request('http://127.0.0.1:9999/', {
method: 'GET',
headers: new Headers(),
type: "arraybuffer",
mode: 'cors',
cache: 'default',
});
var source = new EventSource("http://127.0.0.1:9999/");
source.onmessage = function (event) {
console.log(event)
var counter = event.data; // JSON.parse(event.data);
document.getElementById("content").innerHTML = counter;
}
fetch(myRequest).then(response => {
console.log(response)
console.log(response.headers)
const contentType = response.headers.get("content-type");
if (contentType && contentType.indexOf("application/json") !== -1) {
return response.json().then(data => {
var obj = JSON.parse(str);
console.log(obj)
// Process your data as a JavaScript object
});
} if (contentType && contentType.indexOf("image/jpeg") !== -1) {
console.log("Image received")
return response.blob().then(data => {
var reader = new FileReader();
reader.readAsDataURL(blob);
reader.onloadend = function() {
var imageUrl = reader.result;
var img = document.querySelector("#photo");
img.src = imageUrl;
}
});
}
如果我运行并查看显示的页面，我会看到：
有什么帮助吗？
慕娘9325324浏览 174回答 1
1回答
-
偶然的你
我解决了购买将 QR 字符串推送到服务器，并使用qrcodejs将其转换为 QR 的问题。如果有兴趣，我的完整代码是：// main.gopackage mainimport ( "context" "fmt" "net/http" "os" "os/signal" "syscall" _ "github.com/mattn/go-sqlite3" "google.golang.org/protobuf/proto" "go.mau.fi/whatsmeow" "go.mau.fi/whatsmeow/store" "go.mau.fi/whatsmeow/store/sqlstore" "go.mau.fi/whatsmeow/types/events" waLog "go.mau.fi/whatsmeow/util/log")func eventHandler(evt interface{}) { switch v := evt.(type) { case *events.Message: fmt.Println("Received a message!", v.Message.GetConversation()) }}func main() { passer := &DataPasser{logs: make(chan string)} http.HandleFunc("/sse/dashboard", passer.handleHello) go http.ListenAndServe(":1234", nil) /* ticker := time.NewTicker(500 * time.Millisecond) defer ticker.Stop() done := make(chan bool) go func() { for { select { case <-done: return case <-ticker.C: // fmt.Println("Tick at", t) // passer.logs <- buffer.String() } } }() */ store.DeviceProps.Os = proto.String("WhatsApp GO") dbLog := waLog.Stdout("Database", "DEBUG", true) // Make sure you add appropriate DB connector imports, e.g. github.com/mattn/go-sqlite3 for SQLite container, err := sqlstore.New("sqlite3", "file:datastore.db?_foreign_keys=on", dbLog) if err != nil { panic(err) } // If you want multiple sessions, remember their JIDs and use .GetDevice(jid) or .GetAllDevices() instead. deviceStore, err := container.GetFirstDevice() if err != nil { panic(err) } clientLog := waLog.Stdout("Client", "DEBUG", true) client := whatsmeow.NewClient(deviceStore, clientLog) client.AddEventHandler(eventHandler) if client.Store.ID == nil { // No ID stored, new login qrChan, _ := client.GetQRChannel(context.Background()) err = client.Connect() if err != nil { panic(err) } for evt := range qrChan { switch evt.Event { case "success": { passer.logs <- "success" fmt.Println("Login event: success") } case "timeout": { passer.logs <- "timeout" fmt.Println("Login event: timeout") } case "code": { fmt.Println("new code recieved") fmt.Println(evt.Code) passer.logs <- evt.Code } } } } else { // Already logged in, just connect passer.logs <- "Already logged" fmt.Println("Already logged") err = client.Connect() if err != nil { panic(err) } } // Listen to Ctrl+C (you can also do something else that prevents the program from exiting) c := make(chan os.Signal, 1) signal.Notify(c, os.Interrupt, syscall.SIGTERM) <-c client.Disconnect()}和// api.gopackage mainimport ( "fmt" "net/http" "sync")var ( mux sync.Mutex)type DataPasser struct { logs chan string}func (p *DataPasser) handleHello(w http.ResponseWriter, r *http.Request) { fmt.Println("from here") flusher, ok := w.(http.Flusher) if !ok { http.Error(w, "Internal error", 500) return } w.Header().Set("Content-Type", "text/event-stream") w.Header().Set("Cache-Control", "no-cache") w.Header().Set("Connection", "keep-alive") setupCORS(&w, r) for { select { case c := <-p.logs: fmt.Println("recieved") mux.Lock() //counter++ //c := counter mux.Unlock() fmt.Fprintf(w, "data: %v\n\n", c) flusher.Flush() case <-r.Context().Done(): fmt.Println("Connection closed") return } }}func setupCORS(w *http.ResponseWriter, req *http.Request) { (*w).Header().Set("Cache-Control", "no-cache") (*w).Header().Set("Access-Control-Allow-Origin", "*") (*w).Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE") (*w).Header().Set("Access-Control-Allow-Headers", "Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")}客户端是：<html><head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <script src="https://cdn.rawgit.com/davidshimjs/qrcodejs/gh-pages/qrcode.min.js"></script></head><body> <h5>Server message/Code: <span id="message"></span></h5> <div id="qr"></div> <script> var source = new EventSource("http://localhost:1234/sse/dashboard"); source.onmessage = function (event) { var message = event.data document.querySelector('#message').innerHTML = message; if (new String(message).valueOf() == "success" || new String(message).valueOf() == "timeout" || new String(message).valueOf() == "Already logged") { document.querySelector('#qr').innerHTML = ""; } else { var qrcode = new QRCode("qr", { text: message, width: 128, height: 128, colorDark : "#000000", colorLight : "#ffffff", correctLevel : QRCode.CorrectLevel.M }); } }/* var qrcode = new QRCode( "qr", [ "BEGIN:VCARD", "VERSION:2.1", "N:Doe;John;;Dr;", "FN:Dr. John Doe", "EMAIL:johndoe@hotmail.com", "TEL;TYPE=cell:(123) 555-5832", "END:VCARD" ].join("\r\n") ); */ </script></body></html>
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