relay 1xx from backend over HTTP/2, e.g. 103 Early Hints
(if client is connected using HTTP/2)
enabled by default unless disabled in lighttpd.conf with:
server.feature-flags += ( "server.h2-discard-backend-1xx" = "enable" )
Warning: backends which send 103 Early Hints should check User-Agent
before doing so since naive clients might not handle unexpected 1xx.
Some clients may take the 1xx response as the final response, expecting
only one response. Some clients might not properly handle 100 Continue
if the client did not send Expect: 100-continue with the request.
https://tools.ietf.org/html/rfc8297#section-3 Security Considerations
x-ref:
An HTTP Status Code for Indicating Hints (103 Early Hints)
https://tools.ietf.org/html/rfc8297
move code from connections-glue.c back into connections.c
move code from connections-glue.c to http-header-glue.c
rename connection_response_reset()
to http_response_reset()
rename connection_handle_read_post_error()
to http_response_reqbody_read_error()
group HANDLER_COMEBACK logic in http_response_comeback() and call it
from places that reset state in order to (sometimes partially) reprocess
a request. This includes error handler (server.error-handler),
r->handler_module when cgi.local-redir, and looping in
http_response_prepare() when modules make changes to the request and
return HANDLER_COMEBACK (e.g. mod_rewrite, mod_magnet, mod_cml)
Also, set r->conditional_is_valid closer to where elements are set
(and become valid for use in condition checks), and parse target
in http_request_parse() instead of http_response_prepare()
NB: r->tmp_buf == srv->tmp_buf (pointer is copied for quicker access)
NB: request read and write chunkqueues currently point to connection
chunkqueues; per-request and per-connection chunkqueues are
not distinct from one another
con->read_queue == r->read_queue
con->write_queue == r->write_queue
NB: in the future, a separate connection config may be needed for
connection-level module hooks. Similarly, might need to have
per-request chunkqueues separate from per-connection chunkqueues.
Should probably also have a request_reset() which is distinct from
connection_reset().
convert all log_error_write() to log_error() and pass (log_error_st *)
use con->errh in preference to srv->errh (even though currently same)
avoid passing (server *) when previously used only for logging (errh)
provide standard types in first.h instead of base.h
provide lighttpd types in base_decls.h instead of settings.h
reduce headers exposed by headers for core data structures
do not expose <pcre.h> or <stdlib.h> in headers
move stat_cache_entry to stat_cache.h
reduce use of "server.h" and "base.h" in headers
common codebase for socket backends, based off mod_fastcgi with
some features added for mod_proxy
(mostly intended to reduce code duplication and enhance code isolation)
mod_fastcgi and mod_scgi can now use fastcgi.balance and scgi.balance
for similar behavior as proxy.balance, but the balancing is per-host
and not per-proc. proxy.balance is also per-host and not per-proc.
mod_proxy and mod_scgi can now use proxy.map-extensions and
scgi.map-extensions, similar to fastcgi.map-extensions.
mod_fastcgi behavior change (affects only mod_status):
- statistics tags have been renamed from "fastcgi.*" to "gw.*"
"fastcgi.backend.*" -> "gw.backend.*"
"fastcgi.active-requests" -> "gw.active-requests"
("fastcgi.requests" remains "fastcgi.requests")
("proxy.requests" is new)
("scgi.requests" is new)
mod_scgi behavior change (likely minor):
- removed scgi_proclist_sort_down() and scgi_proclist_sort_up().
procs now chosen based on load as measured by num socket connnections
Note:
modules using gw_backend.[ch] are currently still independent modules.
If it had been written as a single module with fastcgi, scgi, proxy
implementations, then there would have been a chance of breaking some
existing user configurations where module ordering made a difference
for which module handled a given request, though for most people, this
would have made no difference.
Details about mod_fastcgi code transformations:
unsigned int debug -> int debug
fastcgi_env member removed from plugin_config
renamed "fcgi" and "fastcgi" to "gw", and "FCGI" to "GW"
reorganize routines for high-level and lower-level interfaces
some lower-level internal interfaces changed to use host,proc,debug
args rather than knowing about higher-level (app) hctx and plugin_data
tabs->spaces and reformatting
Use same funcs as other dynamic handlers to recv data from backend.
Add hook for fastcgi to process FastCGI packets (and other future
dynamic handlers may hook this in order to handle custom data framing)
large code move, but minimal changes made to code (besides whitespace),
so that code builds
next: need to isolate openssl data structures and config parsing
initialized for mod_magnet and dynamic CGI-like handlers
(mod_cgi, mod_fastcgi, mod_scgi, mod_ssi) (*not* mod_proxy)
Note: in the future a config flag (does not yet exist) might be required
to activate initialization of these SSL_* env variables. This might
occur if there are requests to access these variables in mod_accesslog,
and/or if more SSL_* varables are created, which would be more work.
x-ref:
"pass protocol and cipher details to fcgi env"
https://redmine.lighttpd.net/issues/2511
consolidated from CGI, FastCGI, SCGI, SSI
Note: due to prior inconsistencies between the code in mod_cgi,
mod_fastcgi, mod_scgi, and mod_ssi, there are some minor behavior
changes.
CONTENT_LENGTH is now always set, even if 0
(though CONTENT_LENGTH is never set for FASTCGI_AUTHORIZER)
PATH_INFO is created only if present, not if empty.
(mod_fastcgi and mod_ssi previously set PATH_INFO="" (blank value))
PATH_TRANSLATED is now set if PATH_INFO is present
(previously missing from mod_cgi and mod_ssi)
mod_ssi now sets DOCUMENT_ROOT to con->physical.basedir, like others
(previously, mod_ssi set DOCUMENT_ROOT to con->physical.doc_root,
which matched con->physical.basedir unless mod_alias changed basedir)
mod_ssi now sets REQUEST_URI to con->request.orig_uri, like others
(previously, mod_ssi set REQUEST_URI to con->request.uri, which
matched con->request.orig_uri except after redirects, error docs)
handle X-Sendfile and X-LIGHTTPD-send-file w/ http_response_xsendfile()
if host is configured ( "x-sendfile" = "enable" )
Note: X-Sendfile path is url-decoded for consistency, like X-Sendfile2
(response headers should be url-encoded to avoid tripping over
chars allowed in filesystem but which might change response
header parsing semantics)
Note: deprecated: "allow-x-send-file"; use "x-sendfile"
Note: deprecated: X-LIGHTTPD-send-file header; use X-Sendfile header
Note: deprecated: X-Sendfile2 header; use X-Sendfile header
For now, X-Sendfile2 is still handled internally by mod_fastcgi.
Since http_response_send_file() supports HTTP Range requests,
X-Sendfile2 is effectively obsolete. However, any code, e.g. PHP,
currently using X-Sendfile2 is probably manually generating 206 Partial
Content status and Range response headers. A future version of lighttpd
might *remove* X-Sendfile2. Existing code should be converted to use
X-Sendfile, which is easily done by removing all the special logic
around using X-Sendfile2, since the 206 Partial Content status and Range
response headers are handled in http_response_send_file().
x-ref:
"mod_fastcgi + X-Sendfile -> mod_staticfile"
https://redmine.lighttpd.net/issues/799
"Feature Request: New option "x-send-file-docroot""
https://redmine.lighttpd.net/issues/851
"X-Sendfile handoff to mod-static-file in 1.4.x"
https://redmine.lighttpd.net/issues/2017
"X-sendfile should be able to set content-type"
https://redmine.lighttpd.net/issues/2076
move code from mod_staticfile.c to http-header-glue.c to allow reuse
(includes ETag, Last-Modified headers, Range requests for static files)
operate on path arg instead of con->physical.path
skip Range requests if con->http_status already set >= 300
remove redundant calls to stat_cache_get_entry() handling Range requests
x-ref:
"X-Sendfile handoff to mod-static-file in 1.4.x"
https://redmine.lighttpd.net/issues/2017
Glenn Strauss
Stefan Bühler
Elan Ruusamäe
Jan Kneschke