[英]How convert loaded Image in browser to base64 string?
I loaded a url in qml WebView
, In this page there is an image and is displaying with WebView
but when I get the source of the page with `document.documentElement.innerHTML',I see the image tag like this:我在 qml WebView
加载了一个 url ,在这个页面中有一个图像并且正在用WebView
显示但是当我用`document.documentElement.innerHTML'获取页面的源时,我看到这样的图像标签:
<td class="labelColumn">
<img class="g-Image" title="Captha Image" src="https://website.com/user-account/gwt/entrypoint/registeruser.captcha" style="height: 35px; width: 130px;">
</td>
But the WebView
is displaying this image and I my question is that I should be able to get the image in base64 string or the path of it.但是WebView
正在显示此图像,我的问题是我应该能够以 base64 字符串或其路径获取图像。 How can I find the image?我怎样才能找到图像?
When I run document.images[0].src
I will get https://website.com/user-account/gwt/entrypoint/registeruser.captcha
.当我运行document.images[0].src
我会得到https://website.com/user-account/gwt/entrypoint/registeruser.captcha
。
I want the content of the image ,It may be base64 string or the path or... .我想要图像的内容,它可能是 base64 字符串或路径或...。
Use the HTMl5 <canvas>
element.使用 HTMl5 <canvas>
元素。
Load the image inside of the canvas and then use the toDataURL()
method/function.在画布内加载图像,然后使用toDataURL()
方法/函数。 That should give you the base64 output.这应该给你 base64 输出。
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