<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<br>
<blockquote cite="mid:53A95170.7010706@gmail.com" type="cite">
<blockquote cite="mid:53A9209D.6060809@gmail.com" type="cite"> <br>
I think that when there is no on_read handler and read queue is
empty ( there is no outstanding push_read requests ) AE::Handle
is unable to decide whether to call on_eof or on_error. You
should be able to construct AE::handle with no on_read and empty
queue. Then make push_read( line => ) request and get
on_error called.<br>
</blockquote>
<br>
<br>
Why is AE::Handle unable to decide? Why couldn't it just call
on_eof in that case?<br>
</blockquote>
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
<span style="color: rgb(0, 0, 0); font-family: arial, sans-serif;
font-size: medium; font-style: normal; font-variant: normal;
font-weight: normal; letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: auto;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); display: inline !important;
float: none;"><br>
man clearly says:<br>
> Note that, unlike requests in the read queue, an<span
class="Apple-converted-space"> </span></span><code style="color:
rgb(0, 0, 0); font-style: normal; font-variant: normal;
font-weight: normal; letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: auto;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);">on_read</code><span
style="color: rgb(0, 0, 0); font-family: arial, sans-serif;
font-size: medium; font-style: normal; font-variant: normal;
font-weight: normal; letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: auto;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); display: inline !important;
float: none;"><span class="Apple-converted-space"> </span>callback
doesn't mean you<span class="Apple-converted-space"> </span></span><i
style="color: rgb(0, 0, 0); font-family: arial, sans-serif;
font-size: medium; font-variant: normal; font-weight: normal;
letter-spacing: normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px; background-color: rgb(255, 255,
255);">require</i><span style="color: rgb(0, 0, 0); font-family:
arial, sans-serif; font-size: medium; font-style: normal;
font-variant: normal; font-weight: normal; letter-spacing: normal;
line-height: normal; orphans: auto; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); display: inline !important;
float: none;"><span class="Apple-converted-space"> </span>some
data: if there is an EOF and there are outstanding read requests
then an error will be flagged. With an<span
class="Apple-converted-space"> </span></span><code style="color:
rgb(0, 0, 0); font-style: normal; font-variant: normal;
font-weight: normal; letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: auto;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);">on_read</code><span
style="color: rgb(0, 0, 0); font-family: arial, sans-serif;
font-size: medium; font-style: normal; font-variant: normal;
font-weight: normal; letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: auto;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); display: inline !important;
float: none;"><span class="Apple-converted-space"> </span>callback,
the<span class="Apple-converted-space"> </span></span><code
style="color: rgb(0, 0, 0); font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing: normal; line-height:
normal; orphans: auto; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: auto;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);">on_eof</code><span
style="color: rgb(0, 0, 0); font-family: arial, sans-serif;
font-size: medium; font-style: normal; font-variant: normal;
font-weight: normal; letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: auto;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); display: inline !important;
float: none;"><span class="Apple-converted-space"> </span>callback
will be invoked.<br>
<br>
In other words, say, you are writing script which parses CSV file.
The format is line-oriented. Script reading header line might be
something like:<br>
<br>
my $cv = AE::cv;<br>
my $h = AnyEvent::Handle->new(<br>
fh => $fh,<br>
on_error => sub {<br>
my( $hdl, undef, $msg ) = @_;<br>
$hdl->destroy;<br>
$cv->croak( $msg );<br>
}<br>
);<br>
$h->push_read( line => sub {<br>
my( undef, $header ) = @_;<br>
eval { parser->parse( $header ) };<br>
if( $@ ne '' ) {<br>
$cv->croak( "Parse error: $@" )<br>
} else {<br>
$cv->send;<br>
}<br>
<br>
});<br>
$cv->recv;<br>
<br>
ie, when script expects header line from the file, EOF before
first \n is actually an error and is handled as an error in this
code, on_eof should not be called.<br>
</span>
</body>
</html>