【发布时间】：2014-02-04 20:05:30
【问题描述】：
我有一个页面，其中包含使用 javascript 和 PHP 上传文件的成功图像上传表单画布。第二个页面有一个成功的网络摄像头捕获到画布并正确显示。我正在尝试使用 cam 来调整图像上传脚本，捕获实时 css 对象什么都不做...... html是： 折断
<div id="upContent">
<div class="upload-wrapper">
<span id="upCanvas">Upload This Canvas</span>
</div>
<div class="return-data"></div>
</div>
<script src="js/interactioncam.js"></script>
<script src="https://code.jquery.com/jquery-1.10.2.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<!--script src="js/holder.js"></script-->
而java脚本是：
//interactioncam.js - grab a pic
(function() {
var data;
var dataURL;
var streaming = false,
video = document.querySelector('#video'),
cover = document.querySelector('#cover'),
canvas = document.querySelector('#canvas'),
photo = document.querySelector('#photo'),
startbutton = document.querySelector('#startbutton'),
width = 320,
height = 240;
navigator.getMedia = ( navigator.getUserMedia ||
navigator.webkitGetUserMedia ||
navigator.mozGetUserMedia ||
navigator.msGetUserMedia);
navigator.getMedia(
{
video: true,
audio: false
},
function(stream) {
if (navigator.mozGetUserMedia) {
video.mozSrcObject = stream;
} else {
var vendorURL = window.URL || window.webkitURL;
video.src = vendorURL ? vendorURL.createObjectURL(stream) : stream;
}
video.play();
},
function(err) {
console.log("An error occured! " + err);
}
);
video.addEventListener('canplay', function(ev){
if (!streaming) {
height = video.videoHeight / (video.videoWidth/width);
video.setAttribute('width', width);
video.setAttribute('height', height);
canvas.setAttribute('width', width);
canvas.setAttribute('height', height);
streaming = true;
}
}, false);
function takepicture() {
canvas.width = width;
canvas.height = height;
canvas.getContext('2d').drawImage(video, 0, 0, width, height);
var data = canvas.toDataURL('image/png');
var dataURL = canvas.toDataURL();
photo.setAttribute('src', data);
};
startbutton.addEventListener('click', function(ev){
takepicture();
ev.preventDefault();
}, false);
// Convert DataURL to Blob object
function dataURLtoBlob(dataURL) {
// Decode the dataURL
var dataURL = canvas.toDataURL();
var binary = atob(dataURL.split(',')[1]);
// Create 8-bit unsigned array
var array = [];
for(var i = 0; i < binary.length; i++) {
array.push(binary.charCodeAt(i));
}
// Return our Blob object
return new Blob([new Uint8Array(array)], {type: 'image/png'});
}
// Send IT
$("#upCanvas").live("click", function(){
$("#upCanvas").html("<img src='img/load.gif' alt='load'> Uploading ..");
// Convert Canvas DataURL
var dataURL= canvas.toDataURL();
// Get Our File
var file= dataURLtoBlob(dataURL);
// Create new form data
var fd = new FormData();
// Append our image
fd.append("imageNameHere", file);
$.ajax({
url: "uploadFile.php",
type: "POST",
data: fd,
processData: false,
contentType: false,
}).done(function(respond){
$("#upCanvas").html("Upload This Canvas");
$(".return-data").html("Uploaded Canvas image link: <a href="+respond+">"+respond+"</a>").hide().fadeIn("fast");
});
});
})();
php上传是：
<?php
$allowedExts = array("gif", "jpeg", "jpg", "png");
$temp = explode(".", $_FILES["file"]["name"]);
$extension = end($temp);
if ((($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg")
|| ($_FILES["file"]["type"] == "image/jpg")
|| ($_FILES["file"]["type"] == "image/pjpeg")
|| ($_FILES["file"]["type"] == "image/x-png")
|| ($_FILES["file"]["type"] == "image/png"))
&& ($_FILES["file"]["size"] < 20000)
&& in_array($extension, $allowedExts))
{
if ($_FILES["file"]["error"] > 0)
{
echo "Return Code: " . $_FILES["file"]["error"] . "<br>";
}
else
{
echo "Upload: " . $_FILES["file"]["name"] . "<br>";
echo "Type: " . $_FILES["file"]["type"] . "<br>";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " kB<br>";
echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br>";
if (file_exists("upload/" . $_FILES["file"]["name"]))
{
echo $_FILES["file"]["name"] . " already exists. ";
}
else
{
move_uploaded_file($_FILES["file"]["tmp_name"],
"upload/" . $_FILES["file"]["name"]);
echo "Stored in: " . "upimg/" . $_FILES["file"]["name"];
}
}
}
else
{
echo "Invalid file";
}
?>
关于为什么我无法将画布转换为文件和上传脚本工作的任何建议？
【问题讨论】：
标签： javascript php jquery html canvas