http-compliance : Message: How do browsers detect end of response when no Content-Length hea der is present?

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How do browsers detect end of response when no Content-Length hea d

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Message #44 of 117 |

How do browsers figure out a response is "Complete" if the origin server
doesn't send a "Content-Length" header? What is the normal strategy for
that? The response could be sent in more than one packet, correct?

Thu Oct 4, 2001 6:40 pm

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"Karr, David" <david.karr@...>

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Message #44 of 117 |

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How do browsers figure out a response is "Complete" if the origin server doesn't send a "Content-Length" header? What is the normal strategy for that? The...	Karr, David david.karr@...	Oct 4, 2001 6:40 pm
... RFC 2616 defines browsers behavior in this case. There are several scenarios like Chunked Encoding and end-of-file/connection detection. See a lengthy...	Alex Rousskov rousskov@...	Oct 4, 2001 7:01 pm
I started to read that earlier, but I missed the short "closing the connection" point. So, how exactly do you detect the closing of the connection? If you're ...	Karr, David david.karr@...	Oct 4, 2001 7:48 pm
... You wait for the read(2) call on a socket to return zero bytes, indicating an end-of-file condition. Unfortunately, the situation is complicated by...	Alex Rousskov rousskov@...	Oct 4, 2001 8:06 pm
Typically, your select() will return that the socket is readable, and when you read, you will get back 0 bytes. This signals to you that the connection has...	Hu, James jxh@...	Oct 4, 2001 7:52 pm
... ... but only if the error number tells you so. Negative read size may simply mean that select(2) lied and no data is really available yet. This has very...	Alex Rousskov rousskov@...	Oct 4, 2001 8:10 pm
... So after you've finished reading the last real block of data and get back to the "select" loop, the server will have closed the connection. At the ...	Karr, David david.karr@...	Oct 4, 2001 8:10 pm
... Right. There may be some negative-size reads in-between, of course. Select(2) indicates a change in fd "condition", not necessarily a "ready" state. If you...	Alex Rousskov rousskov@...	Oct 4, 2001 8:16 pm
Of course, always check the error number. -- James ... http://docs.yahoo.com/info/terms/ ... To unsubscribe from this group, send an email to: ...	Hu, James jxh@...	Oct 4, 2001 8:31 pm

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