Bug #946

URL encoding leads to "400 - Bad Request"

Added by Anonymous over 12 years ago. Updated about 3 years ago.

Target version:
Start date:
Due date:
% Done:


Estimated time:
Missing in 1.5.x:



You can't browse to a ip specified in hexadecimal form with lighttpd.
http://0x51a99898/ - - gives 400 - Bad Request
http://0x40e9a763/ - - works fine

This also applies to partial/full hex/octal encoding.

Like the following links to google.
They had http:// infront of them but it marked this ticket as spam :(


Hope i did this right,


-- Wouter

Associated revisions

Revision b47494d4 (diff)
Added by gstrauss about 3 years ago

[config] opts for http header parsing strictness (fixes #551, fixes #1086, fixes #1184, fixes #2143, #2258, #2281, fixes #946, fixes #1330, fixes #602, #1016)

server.http-parseopt-header-strict = "enable"
server.http-parseopt-host-strict = "enable" (implies host-normalize)
server.http-parseopt-host-normalize = "disable"

defaults retain current behavior, which is strict header parsing
and strict host parsing, with enhancement to normalize IPv4 address
and port number strings.

For lighttpd tests, these need to be enabled (and are by default)
For marginally faster HTTP header parsing for benchmarks, disable these.

To allow
- underscores in hostname
- hypen ('-') at beginning of hostname
- all-numeric TLDs
server.http-parseopt-host-strict = "disable"

"lighttpd doesn't allow underscores in host names"
"hyphen in hostname"
"a numeric tld"
"Numeric tld's"
"Bad Request"
"400 Bad Request when using Numeric TLDs"

To allow a variety of numerical formats to be converted to IP addresses
server.http-parseopt-host-strict = "disable"
server.http-parseopt-host-normalize = "enable"

"URL encoding leads to "400 - Bad Request""
"400 Bad Request when using IP's numeric value ("ip2long()")"

To allow most 8-bit and 7-bit chars in headers
server.http-parseopt-header-strict = "disable" (not recommended)

"Russian letters not alowed?"
"header Content-Disposition with russian '?' (CP1251, ascii code 255) causes error"



Updated by Anonymous almost 11 years ago

can confirm this is still the case in 1.5 rev 2140


Updated by Anonymous almost 11 years ago

stbuehler (IRC) took a look at this today, this seems to have fixed it (i myself have done min testing at this stage - very quick test on 1.5)

diff --git a/src/request.c b/src/request.c
index 4298873..4f83175 100644
--- a/src/request.c
++ b/src/request.c
@ -125,7 +125,7 @ static int request_check_hostname(server srv, connection *con, buffer *host) {
} else if (i == 0) {
the first character of the hostname */
- if (!light_isalpha(c)) {
if (!light_isalnum(c)) {
return -1;


Updated by gstrauss over 3 years ago

  • Description updated (diff)

Issue at least partially addressed in the following. Not sure if fully addressed.

commit b87d3e804be04e79c1d3d8b5fc12dac06087dc7d
Author: Stefan B├╝hler <>
Date:   Tue Jul 14 12:57:27 2009 +0000

    Allow digits in hostnames in more places (fixes #1148)

    git-svn-id: svn:// 152afb58-edef-0310-8abb-c4023f1b3aa9


Updated by gstrauss over 3 years ago

  • Status changed from New to Patch Pending
  • Assignee deleted (jan)
  • Target version set to 1.4.40

Updated by gstrauss about 3 years ago

  • Status changed from Patch Pending to Fixed
  • % Done changed from 0 to 100

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