Re: [Cppcms-users] Upload large files

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It is really strange, does it work for a small files?
On what size the failure occurs
Do you have enough space on the disk (default /tmp)?
Does it work or not with internal web server?

Artyom Beilis
--------------
CppCMS - C++ Web Framework:   http://cppcms.com/
CppDB - C++ SQL Connectivity: http://cppcms.com/sql/cppdb/

>________________________________
> From: Saikumar Gandapodi <sai...@gm...>
>To: cpp...@li... 
>Sent: Sunday, May 12, 2013 2:24 PM
>Subject: Re: [Cppcms-users] Upload large files
> 
>
>Artyom,
>   Here is the output of strace when a large file was sent and also a smaller 
>file was sent. 
>Dont know if this will help.
>The member function for post method handler is not called. However for 
>smaller files it does perfectly fine. 
>What could be the issue ?
>
>-----------   strace when a large file (135MB) is sent ---------------
>epoll_wait(8, {{EPOLLIN, {u32=0, u64=0}}}, 128, 3600000) = 1
>epoll_ctl(8, EPOLL_CTL_DEL, 0, {0, {u32=0, u64=0}}) = 0
>accept(0, 0, NULL)                      = 11
>fcntl(11, F_GETFL)                      = 0x2 (flags O_RDWR)
>fcntl(11, F_SETFL, O_RDWR|O_NONBLOCK)   = 0
>readv(11, 0x7fff207f7940, 1)            = -1 EAGAIN (Resource temporarily 
>unavailable)
>epoll_ctl(8, EPOLL_CTL_ADD, 11, {EPOLLIN, {u32=11, u64=11}}) = 0
>epoll_ctl(8, EPOLL_CTL_ADD, 0, {EPOLLIN, {u32=0, u64=0}}) = 0
>epoll_wait(8, {{EPOLLIN, {u32=11, u64=11}}}, 128, 3600000) = 1
>epoll_ctl(8, EPOLL_CTL_DEL, 11, {0, {u32=11, u64=11}}) = 0
>readv(11, [{"\1\1\0\1\0\10\0\0\0\1\0\0\0\0\0\0\1\4\0\1\4N\0\0\17\17SERVER"...,
>16384}], 1) = 16384
>epoll_wait(8, {}, 128, 0)               = 0
>epoll_wait(8, {}, 128, 0)               = 0
>writev(11, [{"\1\6\0\1\0\212\6\0", 8}, {"Content-Type: text/html\r\nStatus:"..
>., 138}, {"\0\0\0\0\0\0", 6}], 3) = 152
>epoll_wait(8, {}, 128, 0)               = 0
>writev(11, [{"\1\6\0\1\0\0\0\0\1\3\0\1\0\10\0\0\0\0\0\0\0\0\0\0", 24}], 1) =
>24
>epoll_wait(8, {}, 128, 0)               = 0
>shutdown(11, 2 /* send and receive */)  = 0
>shutdown(11, 2 /* send and receive */)  = 0
>close(11)                               = 0
>epoll_wait(8, 
>
>
>-----------   strace when a small file (1.5mb) is sent ---------------
>epoll_wait(8, {{EPOLLIN, {u32=0, u64=0}}}, 128, 3600000) = 1
>epoll_ctl(8, EPOLL_CTL_DEL, 0, {0, {u32=0, u64=0}}) = 0
>accept(0, 0, NULL)                      = 11
>fcntl(11, F_GETFL)                      = 0x2 (flags O_RDWR)
>fcntl(11, F_SETFL, O_RDWR|O_NONBLOCK)   = 0
>readv(11, [{"\1\1\0\1\0\10\0\0\0\1\0\0\0\0\0\0\1\4\0\1\4K\0\0\17\17SERVER"..
>., 16384}], 1) = 16384
>epoll_ctl(8, EPOLL_CTL_ADD, 0, {EPOLLIN, {u32=0, u64=0}}) = 0
>brk(0xca0000)                           = 0xca0000
>readv(11, [{"R\vf\20+I\302\26\245\260;X\233\277a\345t!\251\f~b\303\371%\234
>\224\332~%pC"..., 50290}], 1) = 50290
>readv(11, [{"\1\5\0\1\377\377\0\0\366\350\261$\335m\376\275\351\234\333O\"e
>\276y\375\377\373\322\0\20\0\5"..., 65535}], 1) = 45065
>epoll_wait(8, {}, 128, 0)               = 0
>epoll_wait(8, {}, 128, 0)               = 0
>readv(11, [{"DB\f%ZpGZ\24\2\300\232R8\277)\316\2464\314\271\313\263\17?\261
>\7\5\240\202R\25"..., 20478}], 1) = 20478
>epoll_wait(8, {}, 128, 0)               = 0
>epoll_wait(8, {}, 128, 0)               = 0
>epoll_wait(8, {}, 128, 0)               = 0
>brk(0xcdc000)                           = 0xcdc000
>epoll_wait(8, {}, 128, 0)               = 0
>readv(11, [{"\1\5\0\1\377\377\0\0\345\217l\257\257>\261]\24Q\366q,t\37z5\17
>\201\354@\264\373\31"..., 65535}], 1) = 65535
>epoll_wait(8, {}, 128, 0)               = 0
>epoll_wait(8, {}, 128, 0)               = 0
>readv(11, [{"\355U@\213\\\310\245,", 8}], 1) = 8
>epoll_wait(8, {}, 128, 0)               = 0
>epoll_wait(8, {}, 128, 0)               = 0
>brk(0xd1c000)                           = 0xd1c000
>open("/dev/urandom", O_RDONLY)          = 13
>read(13, "5\251\365')\220\255\0\217\314\3306\\\374\327\260", 16) = 16
>close(13)                               = 0
>open("/tmp/cppcms_uploads_35a9f5272990ad008fccd8365cfcd7b0.tmp", O_RDWR
>|O_CREAT|O_TRUNC, 0666) = 13
>writev(13, [{NULL, 0}, {"ID3\3\0\0\0\0\7vTCON\0\0\0\7\0\0\0Blues\0GEOB\0"...,
>1024}], 2) = 1024
>writev(13, [{"", 0}, {"\377\373\322\0\0\0\t\223GDK,2\340\207h\350\211e\206\\
>\16\240\367\37\255<k\211\324\36\343"..., 1024}], 2) = 1024
>MANY writev's happened.......
>writev(13, [{"\377\377\373\322\0>\0\17\374\0K\200\0\0\t \200\tp\0\0\1\0\0\1.
>\0\0\0 \0\0"..., 8190}, {"\377", 1}], 2) = 8191
>write(13, "\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377
>\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377"..., 1133) 
>= 1133
>lseek(13, 0, SEEK_SET)                  = 0
>futex(0xc48534, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xc48530, {FUTEX_OP_SET, 0, 
>FUTEX_OP_CMP_GT, 1}) = 1
>futex(0xc44d80, FUTEX_WAKE_PRIVATE, 1)  = 1
>
>
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