使用Flask后html5无法调用摄像头
HTML文件<!DOCTYPE html><html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>camera</title>
<style>
#camera {
float: left;
margin: 20px;
}
#contentHolder {
width: 300px;
height: 300px;
margin-bottom: 10px;
}
#btn_snap {
margin: 0 auto;
border: 1px solid #f0f0f0;
background: #5CACEE;
color: #FFF;
width: 100px;
height: 36px;
line-height: 36px;
border-radius: 8px;
text-align: center;
cursor: pointer;
cursor: pointer;
/*禁止选择*/
-webkit-touch-callout: none;
/* iOS Safari */
-webkit-user-select: none;
/* Chrome/Safari/Opera */
-khtml-user-select: none;
/* Konqueror */
-moz-user-select: none;
/* Firefox */
-ms-user-select: none;
/* Internet Explorer/Edge */
user-select: none;
/* Non-prefixed version, currently not supported by any browser */
}
#imgBoxxx {
width: 200px;
margin: 60px 20px 20px;
/* border-radius: 50%; */
}
</style>
</head>
<body>
<div id="camera">
<div id="contentHolder">
<video id="video" width="300" height="300" autoplay></video>
<canvas style="display:none;" id="canvas" width="300" height="300"></canvas>
</div>
<div id="btn_snap" onclick="myfunction()">拍照</div>
</div>
<script>
var canvas = document.getElementById("canvas"),
pzBtn = document.getElementById("btn_snap"),
context = canvas.getContext("2d"),
video = document.getElementById("video");
alert('该页面会调用您的摄像头')
// 旧版本浏览器可能根本不支持mediaDevices，我们首先设置一个空对象
if (navigator.mediaDevices === undefined) {
navigator.mediaDevices = {};
}
// 一些浏览器实现了部分mediaDevices，我们不能只分配一个对象
// 使用getUserMedia，因为它会覆盖现有的属性。
// 这里，如果缺少getUserMedia属性，就添加它。
if (navigator.mediaDevices.getUserMedia === undefined) {
navigator.mediaDevices.getUserMedia = function(constraints) {
// 首先获取现存的getUserMedia(如果存在)
var getUserMedia = navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
// 有些浏览器不支持，会返回错误信息
// 保持接口一致
if (!getUserMedia) {
return Promise.reject(new Error('getUserMedia is not implemented in this browser'));
}
//否则，使用Promise将调用包装到旧的navigator.getUserMedia
return new Promise(function(resolve, reject) {
getUserMedia.call(navigator, constraints, resolve, reject);
});
}
}
var constraints = {
audio: false,
video: {
width: 720,
height: 720
}
}
navigator.mediaDevices.getUserMedia(constraints)
.then(function(stream) {
var video = document.querySelector('video');
// 旧的浏览器可能没有srcObject
if ("srcObject" in video) {
video.srcObject = stream;
} else {
//避免在新的浏览器中使用它，因为它正在被弃用。
video.src = window.URL.createObjectURL(stream);
}
video.onloadedmetadata = function(e) {
video.play();
};
})
.catch(function(err) {
console.log(err.name + ": " + err.message);
});
function myfunction() {
var date = new Date().getTime();
// 点击，canvas画图
context.drawImage(video, 0, 0, 300, 300);
// 获取图片base64链接
var image = canvas.toDataURL('image/png');
// 定义一个img
var img = new Image();
//设置属性和src
img.id = "imgBox";
img.src = image;
//将图片添加到页面中
// document.body.appendChild(img);
// base64转文件
function dataURLtoFile(dataurl, filename) {
var arr = dataurl.split(','),
mime = arr.match(/:(.*?);/),
bstr = atob(arr),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr = bstr.charCodeAt(n);
}
return new File(, filename, {
type: mime
});
}
console.log(img);
// console.log(dataURLtoFile(image, date + '.png'));
};
</script>
<script scr="jsQR.js"></script>
</body>
</html>
直接打开的话是可以调用摄像头的
我加了一个flask后from flask import Flask,render_template, request, redirect, url_for, make_response
app = Flask(__name__)
# app.route("/index")
name = ''
password = ''
@app.route("/index", methods=["POST", "GET"])
def index():
global name, password
if request.method == "GET":
return render_template("index.html")
if request.method == "POST":
name = request.form.get("name")
password = request.form.get("password")
if name=="Admin" and password=="123456":
return redirect(url_for('sm'))
# return "a"
else:
return render_template("index.html")
@app.route("/sm", methods=["POST", "GET"])
def sm():
if (name=="Admin" and password=="123456"):
return render_template("sao_ma.html")
else:
return redirect(url_for('index'))
if __name__ == "__main__":
app.run(host='0.0.0.0', port=80, debug = True)
也就是@app.route("/sm", methods=["POST", "GET"])
def sm():
if (name=="Admin" and password=="123456"):
return render_template("sao_ma.html")
else:
return redirect(url_for('index'))
这段代码
再根据flask给的ip打开就无法调用摄像头了
求解 已解决，感谢我自己 Mike_python小 发表于 2023-1-7 09:00
已解决，感谢我自己
《求人不如求自己》 liuhongrun2022 发表于 2023-1-7 09:02
《求人不如求自己》
同感{:10_256:}
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