>Synopsis: httpd reports wrong mimetype when item is in the browser cache
>Category: httpd
>Environment:
System : OpenBSD 6.2
Details : OpenBSD 6.2 (GENERIC) #91: Wed Oct 4 00:35:21
MDT 2017
[email protected]:/usr/src/sys/arch/armv7/compile/GENERIC
Architecture: OpenBSD.armv7
Machine : armv7
>Description:
httpd serves static files (eg. images) with Last-Modified http header.
When a browser next time asks whether this file changed (sends
If-Modified-Since http header) httpd responds with wrong mimetype,
'text/html' when the resource is in the browser cache (304 Not Modified
status code).
>How-To-Repeat:
This bug is common, not arm only. When for example you open this image:
https://man.openbsd.org/openbsd.gif
in a browser with developer tools (F12) open, on the network tab you can
take a look at the response headers, mimetype is correct (image/gif).
After opening press refresh (F5) and look at the response headers again,
and you get the incorrect mimetype, 'text/html'.
>Fix:
check httpd source
dmesg:
OpenBSD 6.2 (GENERIC) #91: Wed Oct 4 00:35:21 MDT 2017
[email protected]:/usr/src/sys/arch/armv7/compile/GENERIC
real mem = 1073741824 (1024MB)
avail mem = 1043845120 (995MB)
mainbus0 at root: Cubietech Cubieboard2
cpu0 at mainbus0: ARM Cortex-A7 r0p4 (ARMv7)
cpu0: DC enabled IC enabled WB disabled EABT branch prediction enabled
cpu0: 32KB(32b/l,2way) I-cache, 32KB(64b/l,4way) wr-back D-cache
cortex0 at mainbus0
sxiccmu0 at mainbus0
psci0 at mainbus0
agtimer0 at mainbus0: tick rate 24000 KHz
simplebus0 at mainbus0: "soc"
sxipio0 at simplebus0: 175 pins
sximmc0 at simplebus0
sdmmc0 at sximmc0: 4-bit, sd high-speed, mmc high-speed, dma
ehci0 at simplebus0
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 configuration 1 interface 0 "Generic EHCI root hub" rev
2.00/1.00 addr 1
sxiahci0 at simplebus0: AHCI 1.1
scsibus0 at sxiahci0: 32 targets
ehci1 at simplebus0
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 configuration 1 interface 0 "Generic EHCI root hub" rev
2.00/1.00 addr 1
sxidog0 at simplebus0
sxirtc0 at simplebus0
com0 at simplebus0: ns16550, no working fifo
com0: console
sxitwi0 at simplebus0
iic0 at sxitwi0
axppmic0 at iic0 addr 0x34: AXP209, ACIN
sxitwi1 at simplebus0
iic1 at sxitwi1
dwge0 at simplebus0
dwge0: address: fe:e1:ba:d0:c1:00
rlphy0 at dwge0 phy 1: RTL8201L 10/100 PHY, rev. 1
ampintc0 at simplebus0 nirq 160, ncpu 2
gpio0 at sxipio0: 32 pins
gpio1 at sxipio0: 32 pins
gpio2 at sxipio0: 32 pins
gpio3 at sxipio0: 32 pins
gpio4 at sxipio0: 32 pins
gpio5 at sxipio0: 32 pins
gpio6 at sxipio0: 32 pins
gpio7 at sxipio0: 32 pins
gpio8 at sxipio0: 32 pins
scsibus1 at sdmmc0: 2 targets, initiator 0
sd0 at scsibus1 targ 1 lun 0: <SD/MMC, SD16G, 0030> SCSI2 0/direct removable
sd0: 14756MB, 512 bytes/sector, 30220288 sectors
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
boot device: sd0
root on sd0a (71701353fb3b725d.a) swap on sd0b dump on sd0b
usbdevs:
Controller /dev/usb0:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000),
Generic(0x0000), rev 1.00
port 1 powered
Controller /dev/usb1:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000),
Generic(0x0000), rev 1.00
port 1 powered
Gábor Hidvégi
