javascript iframe - 设置内容类型标头
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iframe - set Content Type header
提问by
I would like to display a JPEG image dynamically using iframe, but its header should be "Content-type: image/jpeg".
我想使用 iframe 动态显示 JPEG 图像，但它的标题应该是"Content-type: image/jpeg".
Is this possible?
这可能吗？
This would be a workaround for displaying base64 images in IE7:
这将是在 IE7 中显示 base64 图像的解决方法：
1) get base 64 code
1）获取base 64代码
2) decode it using js
2）使用js解码
3) generate iframe image
3) 生成 iframe 图像
回答by Onur Topal
Maybe I did not get what you actually need (especially decode it using js part) but you can try some thing like this
也许我没有得到你真正需要的（特别是使用 js 部分解码它）但你可以尝试这样的事情
var data64 = "your encoded staf..."
document.getElementById("divContent").innerHTML = "<iframe name='innerFrame' src='"+data64 +"'></iframe>";
Apparently the above code doesn t work for IE. you can use the below block instead.
显然上面的代码不适用于 IE。您可以改用下面的块。
var data64 = "your encoded staf..."
document.getElementById("divContent").innerHTML = "<iframe name='innerFrame'></iframe>";
var objDoc = window.frames[ "innerFrame" ].document;
objDoc.write("<img src='"+data64 +"' />");
you can also add an image to iframe document. But I would just use the adding a img tag to original page (parent page of the iframe.)
您还可以将图像添加到 iframe 文档。但我只会使用向原始页面（iframe 的父页面）添加 img 标签。
回答by paulslater19
You'd want to return the content-type from the server returning the iframe source.
您希望从返回 iframe 源的服务器返回内容类型。
In other words if your iframe looked like: <iframe src="http://www.foobar.com/test.php>, the test.phpshould set the content-type to image/jpeg
换句话说，如果您的 iframe 看起来像：<iframe src="http://www.foobar.com/test.php>，test.php则应将内容类型设置为image/jpeg
