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HTTP request doesn't time out when Web server not responding

From: Finn Ellebaek Nielsen <finn.ellebaek.nielsen@changegroup.dk>
Date: Mon, 30 Dec 2002 12:45:21 +0100
To: <www-lib@w3.org>
Message-ID: <NCBBIGFIDDKMAGMOGGHOOELCDKAA.finn.ellebaek.nielsen@changegroup.dk>

Dear all.

Windows 2000 Professional SP2
LibWWW 5.4.0

I have difficulties getting the HTTP requests to time out when the Web
server is not responding. For instance, the showtext example sets up a
timeout of 15 seconds, but it just continues to wait forever. My program
(with a timeout of 30 seconds) produces the following trace when the Web
server on localhost is not started:

Timer....... registering 004076A0 as timer set cbf
Timer....... registering 00407710 as timer delete cbf
Event....... registering 00406AC0
Event....... registering 00406DD0
Transport... Adding `tcp'
Transport... Adding `buffered_tcp'
Transport... Adding `local'
Protocol.... Adding `ftp'
Protocol.... Adding `nntp'
Protocol.... Adding `news'
Protocol.... Adding `gopher'
Protocol.... Adding `http'
Protocol.... Adding `file'
Protocol.... Adding `cache'
Protocol.... Adding `telnet'
Protocol.... Adding `tn3270'
Protocol.... Adding `rlogin'
Net Before.. Add 0043BE60 with order 49150 tmplate `http://*' context
00000000
Net Before.. Add 0043CA40 with order 49150 tmplate `http://*' context
00000000
Net Before.. Add 0043B770 with order 49150 tmplate `<null>' context 00000000
Net Before.. Add 0043B600 with order 49150 tmplate `<null>' context 00000000
Net After... Add 0043BEF0 with order 32767 tmplate `http://*' code -401
context 00000000
Net After... Add 0043BEF0 with order 32767 tmplate `http://*' code -418
context 00000000
Net After... Add 0043CCD0 with order 32767 tmplate `http://*' code 1 context
00000000
Net After... Add 0043BB20 with order 32767 tmplate `http://*' code 301
context 00000000
Net After... Add 0043BB20 with order 32767 tmplate `http://*' code 302
context 00000000
Net After... Add 0043BB20 with order 32767 tmplate `http://*' code 303
context 00000000
Net After... Add 0043BB20 with order 32767 tmplate `http://*' code 307
context 00000000
Net After... Add 0043BF50 with order 32767 tmplate `http://*' code 1 context
00000000
Net After... Add 0043BD20 with order 32767 tmplate `http://*' code 305
context 00000000
Net After... Add 0043B910 with order 49150 tmplate `<null>' code 1 context
00000000
Conversions. Adding 00407A80 with quality 1.00
Conversions. Adding 004397C0 with quality 1.00
Conversions. Adding 004399F0 with quality 1.00
Conversions. Adding 004398D0 with quality 1.00
Conversions. Adding 00439930 with quality 1.00
Conversions. Adding 00439990 with quality 1.00
Conversions. Adding 00439A50 with quality 1.00
Conversions. Adding 00439D70 with quality 1.00
Conversions. Adding 004382C0 with quality 1.00
Conversions. Adding 00437A80 with quality 1.00
Conversions. Adding 00435EB0 with quality 1.00
Conversions. Adding 00434060 with quality 1.00
Conversions. Adding 00434140 with quality 1.00
Conversions. Adding 00432FC0 with quality 1.00
Conversions. Adding 004318F0 with quality 1.00
Conversions. Adding 00431C00 with quality 1.00
Conversions. Adding 0042CEB0 with quality 1.00
Conversions. Adding 00407B10 with quality 0.30
Codings..... Adding chunked with quality 1.00
Net After... Add 00401221 with order 65535 tmplate `<null>' code 1 context
00000000
ChunkStream. Chunk 008A9D38 created with max size 0
HTAccess.... Accessing document http://localhost/
Net Before.. calling 0043B770 (request 008A2930, context 00000000)
Net Before.. calling 0043BE60 (request 008A2930, context 00000000)
URL Tree.... did NOT find `w3c-AA'
Credentials. verified
Net Before.. calling 0043CA40 (request 008A2930, context 00000000)
URL Tree.... did NOT find `w3c-pep'
Net Before.. calling 0043B600 (request 008A2930, context 00000000)
Net Object.. 008AA148 created with hash 0
Net Object.. starting request 008A2930 (retry=1) with net object 008AA148
HTTP........ Looking for `http://localhost/'
HTHost parse Looking up `localhost' on port 80
Event....... Created event 008AAF08 with context 008AADC8, priority 20, and
timeout 30000
Event....... Created event 008AAF60 with context 008AADC8, priority 20, and
timeout 30000
Event....... Created event 008AAFB8 with context 008AADC8, priority 20, and
timeout 30000
Event....... Created event 008AB010 with context 008AADC8, priority 20, and
timeout 30000
Event....... Created event 008AB068 with context 008AADC8, priority 20, and
timeout 30000
Event....... Created event 008AB0C0 with context 008AADC8, priority 20, and
timeout 30000
Host info... added `localhost' with host 008AADC8 to list 008AABE0
Host connect Grabbing lock on Host 008AADC8 with 008AA148
Host info... Added Net 008AA148 (request 008A2930) to pipe on Host 008AADC8,
1 requests made, 1 requests in pipe, 0 pend
ing
HTHost...... No ActivateRequest callback handler registered
HTHost 008AADC8 going to state TCP_CHANNEL.
HTHost 008AADC8 going to state TCP_DNS.
DNS Add..... `localhost' with 1 home(s) to 008AB2F0
ParseInet... as port 80 on 127.0.0.1 with 1 homes
HTHost 008AADC8 going to state TCP_NEED_SOCKET.
Socket...... Created 560
Net Manager. Increasing active sockets to 1, 0 persistent sockets
Socket...... Turned off Nagle's algorithm
Socket...... Blocking socket
Channel..... Hash value is 24
Channel..... Added 008AB688 to list 008AB640
Reader...... Created reader stream 00DF0068
Socket...... TCP send buffer size is 8192 for socket 560
HTHost 008AADC8 going to state TCP_NEED_CONNECT.
HTDoConnect. WOULD BLOCK `localhost'
Host Event.. WRITE passed to `http://localhost/'
HTDoConnect. WOULD BLOCK `localhost'
Host Event.. WRITE passed to `http://localhost/'
HTDoConnect. WOULD BLOCK `localhost'
Host Event.. WRITE passed to `http://localhost/'
HTDoConnect. WOULD BLOCK `localhost'

The last two lines are produced about once a second and the program just
keeps on running.

What is wrong?

Happy New Year.

Best regards,

Finn Ellebaek

---------------------------------------------------------------------------
 Finn Ellebaek Nielsen                           ChangeGroup ApS
 Product Manager, Principal Consultant, Partner  Kronprinsessegade 54, 4.
 E-mail: finn.ellebaek.nielsen@changegroup.dk    DK-1306  Koebenhavn K
 Mobile: +45 20 32 49 25                         Denmark
 Phone:  +45 33 32 77 78                         http://www.changegroup.dk
---------------------------------------------------------------------------
                      "Where do you want to GPF today?"
Received on Monday, 30 December 2002 06:46:36 GMT

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