From 39db8691fe40adcfdb827c194636b87391c7c416 Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <alx@nginx.com>
Date: Fri, 21 Jul 2023 13:58:37 +0200
Subject: Auto: zlib: added --no-zlib.

Related to:

    HTTP: compress: gzip

Signed-off-by: Alejandro Colomar <alx@nginx.com>
---
 auto/options                 |  4 ++++
 auto/summary                 |  1 +
 auto/zlib                    | 39 +++++++++++++++++++++++++--------------
 src/nxt_http_compress.c      |  2 +-
 src/nxt_http_compress_gzip.c | 14 ++++++++++++--
 src/nxt_http_compress_gzip.h |  9 +++++++++
 6 files changed, 52 insertions(+), 17 deletions(-)

diff --git a/auto/options b/auto/options
index 0550c699..ef0459f3 100644
--- a/auto/options
+++ b/auto/options
@@ -20,6 +20,8 @@ NXT_PCRE_LIB=
 NXT_REGEX=YES
 NXT_TRY_PCRE2=YES
 
+NXT_ZLIB=YES
+
 NXT_TLS=NO
 NXT_OPENSSL=NO
 NXT_GNUTLS=NO
@@ -104,6 +106,8 @@ do
         --no-regex)                      NXT_REGEX=NO                        ;;
         --no-pcre2)                      NXT_TRY_PCRE2=NO                    ;;
 
+        --no-zlib)                       NXT_ZLIB=NO                         ;;
+
         --openssl)                       NXT_OPENSSL=YES                     ;;
         --gnutls)                        NXT_GNUTLS=YES                      ;;
         --cyassl)                        NXT_CYASSL=YES                      ;;
diff --git a/auto/summary b/auto/summary
index 3aa41669..0e87b88a 100644
--- a/auto/summary
+++ b/auto/summary
@@ -29,6 +29,7 @@ Unit configuration summary:
   Unix domain sockets support: $NXT_UNIX_DOMAIN
   TLS support: ............... $NXT_OPENSSL
   Regex support: ............. $NXT_REGEX
+  zlib support: .............. $NXT_ZLIB
   NJS support: ............... $NXT_NJS
 
   process isolation: ......... $NXT_ISOLATION
diff --git a/auto/zlib b/auto/zlib
index dab30d38..b4e964c3 100644
--- a/auto/zlib
+++ b/auto/zlib
@@ -3,21 +3,32 @@
 # Copyright (C) NGINX, Inc.
 
 
-NXT_ZLIB_CFLAGS="$(pkgconf --cflags-only-I zlib 2>/dev/null || echo "")"
-NXT_ZLIB_LIBS="$(pkgconf --libs zlib 2>/dev/null || echo "-lz")"
+NXT_HAVE_ZLIB=no
+NXT_ZLIB_CFLAGS=
+NXT_ZLIB_LIBS=
 
 
-nxt_feature="zlib"
-nxt_feature_name=NXT_HAVE_ZLIB
-nxt_feature_run=no
-nxt_feature_incs=$NXT_ZLIB_CFLAGS
-nxt_feature_libs=$NXT_ZLIB_LIBS
-nxt_feature_test="#include <stdio.h>
+if [ $NXT_ZLIB = YES ]; then
 
-                  #include <zlib.h>
+    NXT_ZLIB_CFLAGS="$(pkgconf --cflags-only-I zlib 2>/dev/null || echo "")"
+    NXT_ZLIB_LIBS="$(pkgconf --libs zlib 2>/dev/null || echo "-lz")"
 
-                  int main(void) {
-                      puts(zlibVersion());
-                      return 0;
-                  }"
-. auto/feature
+    nxt_feature="zlib"
+    nxt_feature_name=NXT_HAVE_ZLIB
+    nxt_feature_run=no
+    nxt_feature_incs=$NXT_ZLIB_CFLAGS
+    nxt_feature_libs=$NXT_ZLIB_LIBS
+    nxt_feature_test="#include <stdio.h>
+
+                      #include <zlib.h>
+
+                      int main(void) {
+                          puts(zlibVersion());
+                          return 0;
+                      }"
+    . auto/feature
+
+    if [ $nxt_found = yes ]; then
+        NXT_HAVE_ZLIB=YES
+    fi
+fi
diff --git a/src/nxt_http_compress.c b/src/nxt_http_compress.c
index f78a16ed..55e20e3a 100644
--- a/src/nxt_http_compress.c
+++ b/src/nxt_http_compress.c
@@ -63,7 +63,7 @@ nxt_http_compress_init(nxt_router_conf_t *rtcf, nxt_http_action_t *action,
         return NXT_ERROR;
     }
 
-    if (nxt_str_eq(&conf->encoding, "gzip", strlen("gzip"))) {
+    if (NXT_WITH_ZLIB && nxt_str_eq(&conf->encoding, "gzip", strlen("gzip"))) {
         conf->handler = nxt_http_compress_gzip;
 
     } else {
diff --git a/src/nxt_http_compress_gzip.c b/src/nxt_http_compress_gzip.c
index 169b463d..db675ecf 100644
--- a/src/nxt_http_compress_gzip.c
+++ b/src/nxt_http_compress_gzip.c
@@ -9,8 +9,6 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include <zlib.h>
-
 #include <nxt_unit_cdefs.h>
 
 #include "nxt_buf.h"
@@ -25,6 +23,10 @@
 #include "nxt_string.h"
 #include "nxt_types.h"
 
+#if (NXT_WITH_ZLIB || __has_include(<zlib.h>))
+#include <zlib.h>
+#endif
+
 
 typedef struct nxt_http_compress_gzip_ctx_s  nxt_http_compress_gzip_ctx_t;
 
@@ -35,7 +37,9 @@ struct nxt_http_compress_gzip_ctx_s {
 
     int8_t              level;
 
+#if (NXT_WITH_ZLIB)
     z_stream            z;
+#endif
 };
 
 
@@ -91,6 +95,9 @@ static nxt_http_compress_gzip_ctx_t *
 nxt_http_compress_gzip_ctx(nxt_task_t *task, nxt_http_request_t *r,
     nxt_http_compress_conf_t *conf)
 {
+#if (!NXT_WITH_ZLIB)
+    return NULL;
+#else
     int                           ret;
     z_stream                      *z;
     nxt_http_compress_gzip_ctx_t  *ctx;
@@ -114,12 +121,14 @@ nxt_http_compress_gzip_ctx(nxt_task_t *task, nxt_http_request_t *r,
     }
 
     return ctx;
+#endif
 }
 
 
 static void
 nxt_http_compress_gzip_filter(nxt_task_t *task, void *obj, void *data)
 {
+#if (NXT_WITH_ZLIB)
     int                           ret;
     ssize_t                       size;
     z_stream                      *z;
@@ -180,4 +189,5 @@ fail:
     }
 
     return;
+#endif
 }
diff --git a/src/nxt_http_compress_gzip.h b/src/nxt_http_compress_gzip.h
index 15facc69..e0c2dee2 100644
--- a/src/nxt_http_compress_gzip.h
+++ b/src/nxt_http_compress_gzip.h
@@ -7,6 +7,8 @@
 #define NXT_HTTP_COMPRESS_GZIP_H_INCLUDED_
 
 
+#include "nxt_auto_config.h"
+
 #include "nxt_router.h"
 
 #include "nxt_http.h"
@@ -14,6 +16,13 @@
 #include "nxt_types.h"
 
 
+#if defined(NXT_HAVE_ZLIB)
+#define NXT_WITH_ZLIB  1
+#else
+#define NXT_WITH_ZLIB  0
+#endif
+
+
 nxt_int_t nxt_http_compress_gzip(nxt_task_t *task, nxt_http_request_t *r,
     nxt_http_compress_conf_t *conf);
 
-- 
cgit