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Code Issues Wiki

mod_deflate: handle more responses

This commit is contained in:
Stefan Bühler 2009-09-28 20:57:09 +02:00
parent 241d0e48de
commit ac028f50c7
1 changed files with 48 additions and 14 deletions
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62
src/modules/mod_deflate.c
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@ -4,15 +4,35 @@
* Description:
* compress content on the fly
*
* Does not compress:
* - HEAD requests
* - response status: 100, 101, 204, 205, 304
* - already compressed content
* - if more than one etag response header is sent
* - if no common encoding is found
*
* Supported encodings
* - gzip, deflate (needs zlib)
* - bzip2 (needs bzip2)
*
* + Modifies etag response header (if present)
* + Adds "Vary: Accept-Encoding" response header
* + Resets Content-Length header
*
* Setups:
* none
*
* Options:
* none
* deflate.debug <boolean>
*
* Actions:
* deflate
*
* Example config:
* deflate
* deflate;
*
* TODO:
* - etag 304 handling
*
* Author:
* Copyright (c) 2009 Stefan Bühler
@ -424,23 +444,32 @@ static liHandlerResult deflate_handle(liVRequest *vr, gpointer param, gpointer *
UNUSED(context);
if (vr->request.http_method == LI_HTTP_METHOD_HEAD) {
if (debug)
if (debug) {
VR_DEBUG(vr, "%s", "deflate: method = HEAD => not compressing");
}
return LI_HANDLER_GO_ON;
}
VREQUEST_WAIT_FOR_RESPONSE_HEADERS(vr);
if (vr->response.http_status != 200) {
if (debug)
VR_DEBUG(vr, "%s", "deflate: status != 200 => not compressing");
/* disable compression for some http status types. */
switch(vr->response.http_status) {
case 100:
case 101:
case 204:
case 205:
case 304:
/* disable compression as we have no response entity */
return LI_HANDLER_GO_ON;
default:
break;
}
/* response already encoded */
if (li_http_header_find_first(vr->response.headers, CONST_STR_LEN("content-encoding"))) {
if (debug)
if (debug) {
VR_DEBUG(vr, "%s", "deflate: Content-Encoding already set => not compressing");
}
return LI_HANDLER_GO_ON;
}
@ -455,12 +484,16 @@ static liHandlerResult deflate_handle(liVRequest *vr, gpointer param, gpointer *
hh_encoding_entry = li_http_header_find_next(hh_encoding_entry, CONST_STR_LEN("accept-encoding"));
}
if (0 == encoding_mask)
return LI_HANDLER_GO_ON; /* no known encoding found */
encoding_mask &= encoding_available_mask;
if (0 == encoding_mask) {
/* no common encoding found */
if (debug)
VR_DEBUG(vr, "%s", "deflate: no common encoding found => not compressing");
return LI_HANDLER_GO_ON;
if (debug) {
VR_DEBUG(vr, "%s", "no common encoding found => not compressing");
}
return LI_HANDLER_GO_ON; /* no common encoding found */
}
/* find best encoding (first in list) */
@ -469,16 +502,17 @@ static liHandlerResult deflate_handle(liVRequest *vr, gpointer param, gpointer *
hh_etag_entry = li_http_header_find_first(vr->response.headers, CONST_STR_LEN("etag"));
if (hh_etag_entry) {
if (li_http_header_find_next(hh_etag_entry, CONST_STR_LEN("etag"))) {
if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
VR_ERROR(vr, "%s", "duplicate etag header in response, will not deflate it");
if (debug || CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
VR_DEBUG(vr, "%s", "duplicate etag header in response, will not deflate it");
}
return LI_HANDLER_GO_ON;
}
hh_etag = (liHttpHeader*) hh_etag_entry->data;
}
if (debug)
if (debug || CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
VR_DEBUG(vr, "deflate: compressing using %s encoding", encoding_names[i]);
}
switch ((encodings) i) {
case ENCODING_IDENTITY: