如何在服務器上傳畫布圖片？

我就拿一個單元通過使用HTML5現在我想上傳圖片到服務器（通過在使用Spring MVC +阿賈克斯我要上傳谷歌應用程序團塊存儲中的形象）任何一個可以幫助我我在這裏的示例代碼如何在服務器上傳畫布圖片？

<video id="video" width="640" height="480" autoplay></video> 
<button id="snap">Snap Photo</button> 
<canvas id="canvas" width="640" height="480"></canvas> 
<button id="getBase" onclick="getBase()">Get Base64</button> 
<textarea id="textArea"></textarea> 

<script> 

// Put event listeners into place 
window.addEventListener("DOMContentLoaded", function() { 
    // Grab elements, create settings, etc. 
    var canvas = document.getElementById("canvas"),   
    context = canvas.getContext("2d"), 
    video = document.getElementById("video"), 
    videoObj = { "video": true }, 
    errBack = function(error) { 
    console.log("Video capture error: ", error.code); 
    }; 

    // Put video listeners into place 
    if(navigator.getUserMedia) { // Standard 
     navigator.getUserMedia(videoObj, function(stream) { 
      video.src = stream; 
      video.play(); 
     }, errBack); 
    } else if(navigator.webkitGetUserMedia) { // WebKit-prefixed 
     navigator.webkitGetUserMedia(videoObj, function(stream){ 
      video.src = window.webkitURL.createObjectURL(stream); 
      video.play(); 
     }, errBack); 
    } 

    // Trigger photo take 
    document.getElementById("snap").addEventListener("click", function() { 
     context.drawImage(video, 0, 0, 640, 480); 
    }); 

    document.getElementByID("getBase").addEventListener("click", getBase()); 

}, false);     

function getBase(){ 
    var imgBase = canvas.toDataURL("image/png"); 
    alert(imgBase); 

    document.getElementByID("textArea").value=imgBase; 
}

任何一個可以幫助我，我如何上傳圖像服務器通過使用AJAX

來源

2013-08-16 user2563516