What problems may using the MIME type application/json cause?

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不知归路 2020-12-21 06:10
I am working on a web service the needs to return JSON data. I read that I should use application/json but am not sure what problems this may cause?
For example, w
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遥遥无期 (楼主)
2020-12-21 06:20
Let's consider IE. Say you have a hidden iFrame which you use to request a file download. For example

</code></pre>

<p>Now, the server may send a JSON-encoded error message like</p>

<pre><code>{
    error: 'File 123 does not exist',
    retryLater: false
}
</code></pre>

<p>If that error message is sent as <code>application/json</code>, a download dialog will appear, because the JSON text is mistaken for the actual file.</p>

<p>On the other hand, a MIME type of <code>text/plain</code> will cause the message to be rendered in the iFrame, and you can extract it, and transform it into a fancy pop-up or something using JScript.</p>

<hr>

<p>(Edit)</p>

<p>Real-world example: EXTJS Fileupload - Problem with IE8 security bar</p>
    </p>
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