我正在尝试实现一个粘贴处理程序以从用户的剪贴板获取图像。我希望它只在 Google Chrome 上运行,我不担心其他浏览器。
这是我在 Internet 上找到的方法的一部分,我正在尝试对其进行调整。
// Get the items from the clipboard
var items = e.clipboardData.items;
if (items) {
// Loop through all items, looking for any kind of image
for (var i = 0; i < items.length; i++) {
if (items[i].type.indexOf("image") !== -1) {
// We need to represent the image as a file,
var blob = items[i].getAsFile();
// and use a URL or webkitURL (whichever is available to the browser)
// to create a temporary URL to the object
var URLObj = window.URL || window.webkitURL;
var source = URLObj.createObjectURL(blob);
createImage(source);
}
}
}
该方法有效,如果我使用我的“源”作为图像对象的 src,我可以显示图像。问题是谷歌浏览器中的图像源将是这样的:blob:http://localhost:8080/d1328e65-ade2-45b3-a814-107cc2842ef9
我需要将此图像发送到服务器,因此我想将其转换为 base64 版本。例如:
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAArgAAAAjCAIAAADwnO7RAAAKMWlDQ1BJQ0MgUHJvZmlsZQAASImdlndUU9kWh8+9N71QkhCKlNBraFICSA29SJEuKjEJEErAkAAiNkRUcERRkaYIMijggKNDkbEiioUBUbHrBBlE1HFwFBuWSWStGd+8ee/Nm98f935rn73P3Wfvfda6AJD8gwXCTFgJgAyhWBTh58WIjYtnYAcBDPAAA2wA4HCzs0IW+EYCmQJ82IxsmRP4F726DiD5+yrTP4zBAP+flLlZIjEAUJiM5/L42VwZF8k4PVecJbdPyZi2NE3OMErOIlmCMlaTc/IsW3z2mWUPOfMyhDwZy3PO4mXw5Nwn4405Er6MkWAZF+cI+LkyviZjg3RJhkDGb+SxGXxONgAoktwu5nNTZGwtY5IoMoIt43kA4EjJX/DSL1jMzxPLD8XOzFouEiSniBkmXFOGjZMTi+HPz03ni8XM...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
在第一段代码中,我有一个代表文件的 blob 对象。我尝试了几种方法,但没有得到正确的表示。如何使用它来创建 base64 表示?