https - Why does this SSL_pending call always return zero? -



https - Why does this SSL_pending call always return zero? -

this code https server using blocking sockets:

request := ''; start := gettickcount; repeat if ssl_pending(ssl) > 0 begin bytesin := ssl_read(ssl, buffer, sizeof(buffer)-1); if bytesin > 0 begin buffer[bytesin] := #0; request := request + buffer; end else break; // read failed end; // pending until (gettickcount - start) > largetimeout; // "request" ready, though perchance empty

ssl_pending() always returns 0 , ssl_read() never reached. if ssl_pending() phone call removed, ssl_read() executed. why doesn't ssl_pending() indicate how many bytes available?

note if phone call ssl_read() , number of bytes returned less buffer size, you've read , done.

if incoming info larger buffer size, first ssl_read() phone call fills buffer, , can repeat calling ssl_read() until can't fill buffer.

but if incoming info exact multiple of buffer size, lastly chunk of info fills buffer. if effort ssl_read() thinking there might more info on blocking socket, hangs indefinitely. hence want check ssl_pending() first. yet doesn't appear work.

how avoid hanging on final ssl_read()? (i can't imagine reply go non-blocking, since means never utilize ssl_read blocking.)

update: next works. apparently ssl_pending() doesn't work until after first ssl_read():

request := ''; repeat bytesin := ssl_read(ssl, buffer, sizeof(buffer)-1); if bytesin > 0 begin buffer[bytesin] := #0; request := request + buffer; end else break; // read failed until ssl_pending(ssl) <= 0; // "request" ready, though perchance empty

you using ssl_pending() wrong way. openssl uses state machine, ssl_pending() indicates if state machine has pending bytes have been buffered , awaiting processing. since never calling ssl_read(), never buffering info or advancing state machine.

https openssl winsock

Comments

Post a Comment

Popular posts from this blog

iphone - Dismissing a UIAlertView -

iphone - Dismissing a UIAlertView - i set in app purchase app, , when user taps button, purchase started. basically, tap button, , depending on speed on net connection, waiting 10 seconds until new alert view comes asking if purchase product. user tap button multiple times since nil came up, , multiple purchase alert views come up. additionally, maybe seen user app bug. in end, problem. i want alert view come spinning wheel says "loading..." when users taps purchase button. problem is, how dismiss when new alert view comes asking user if want purchase product? if ([uialertview alloc] says: @"whatever apple's alert view says") { //dismiss "loading..." alert view here } i uncertainty work, input appreciated. thanks! you need have access alertview. can this. create alertview instance var in app delegate , when want show loading initialize instance var assign property , when want dismiss phone call [alertviewinstance d...
Read more

intellij idea - Update external libraries with intelij and java -

intellij idea - Update external libraries with intelij and java - simple plenty really. i'm using apache jars, i'll create changes jar's every often. these jars listed external libs in intelij (i.e classpath looking install dir of jar's). when create changes intelij doesn't seem know new implementation. have remove jar external library , re-ad it. does know have intelij picks changes automatically ? i've done clean , rebuild project had little effect. you can go preferences -> build, execution, deployment -> build tools -> maven -> importing , check box says import maven projects automatically . in mac, can command + shift + a , come in action reimport , click on reimport maven projects . intellij-idea
Read more

javascript - send data from a new window to previous window in php -

javascript - send data from a new window to previous window in php - i have image in main.php file : <img src="..\images\image.gif" class="cur" onclick="imgwin();"> when click on image below function has called : function imgwin() { imagewin=window.open("../pages/img.php","imagewin","toolbar=no,width=500,height=200,directories=no,menubar=no,scrollbars=yes"); } this function opens img.php in new window img.php file : <html> <head> <title>upload image</title> </head> <body> <form name="imgform" method="get" action="#"> address : <input type="file" name="imgurl" size="50"> description : <input type="text" name="description" size="50"> <input type="submit" value="sumbit...
Read more