What is the point to put deadlock code ahead of JSON in HTTP response?

Posted by Morgan Cheng on Stack Overflow See other posts from Stack Overflow or by Morgan Cheng
Published on 2010-04-02T08:21:00Z Indexed on 2010/04/02 8:23 UTC
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JavaScript

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http

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JSON

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deadlock

When sniffing Gmail and Facebook traffic, I found there are leading deadlock code before JSON response of XmlHttpRequest.

For example

for (;;);{"t":"continue"}

and

while(1); [["v","nW3OxUDq0kU.en.","8","51bec53f21305d9c"],["di",86]]

What is the purpose of this "for(;;);" and "while(1);" deadlock?

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