Sockets + feof

[Anon]

Hi there,

I have been working on an SMTP class for the past hour. I'm fairly new to PHP, but I've coded the SMTP class from scratch and everything is fine, except...

When I send a command (for example "HELO localhost"), my server often responds with a response greater than one line.

I check for the first character of the response to be a 2, which indicates a successful execution on the mail server. This is all good, but when I send the next command and check for the response, fread() reads from the previous responses. I have come to the conclusion that multiple freads() just appends data to the fread() stack. And, because I only return the 1st character of the server's response, my pointer only moves 1 character at a time. I know that after each response, I need to move the pointer to the end of the returned data. However, when I use:

while (!feof($mysocket)) {
$response .= fgets($mysocket, 1024);
}

the above never ends. The loop goes on forever. I use fsockopen to open a connection to my mailserver. I have yet to find a way to go to the end of the fread() buffer. I try doing fread($mysocket, 4096) because my server never responds with more than 4096 bytes of data, but that just stalls the script again ( I guess fread() cannot find 4096 charactesr, so it stalls. I tried using 1024, but to no avail.

Could someone PLEASE help me out. This is an urgent situation, and I don't want to use another mail script. Mine has a ton of error handling in it. I'll share the script as soon as its done.

Thanks a lot.
Ara
[e-mail]

[dstockto]

Perhaps you can try retrieving everything up to the newline character. Since you said it is returning more than one line, maybe there is another identifying ending character or series of characters. Maybe something similar to the <cr>.<cr> that you end the data section with when sending the mail. After you get the entire response, just parse out the first letter (character) and see if that is a 2. Then the pointer should have advanced far enough. The other possibility is to see if you can flush the fread buffer after you parse a 2. This won't lead to the most robust code, but it'd get your script working for the time being.

Dave

[[deleted]]

Sockets don't use and FEOF signal.
Instead you must define strings that qualify the end of a block of data.

For example, NNTP allways ends its data with either a linebreak or a single line containing a single dot.

Read the RFC and try again.

[Anon]

I had the same problem - use FREAD not FGETS. FGETS returns after it encounters a newline, whereas FREAD doesn't (it keeps on going). That should do it!

Dave

[Anon]

Hey Dave,

Thanks for the reply, but when I use fread and specify a length larger than the length of the server's response, it just stalls my script. For example, if I use fread($mysocket, 1024), and my server's response is only 1000 characters in length, then the script just stalls.