http: Add zlib compression support

This adds support for both deflate & gzip compressors.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/nxt_http_compression.h b/src/nxt_http_compression.h
index 4e63d34d..abfecd92 100644
--- a/src/nxt_http_compression.h
+++ b/src/nxt_http_compression.h
@@ -12,12 +12,23 @@
 #include <stdint.h>
 #include <stdbool.h>
 
+#if NXT_HAVE_ZLIB
+#include <zlib.h>
+#endif
+
 #include <nxt_main.h>
 #include <nxt_router.h>
 #include <nxt_string.h>
 #include <nxt_conf.h>
 
 
+#if NXT_HAVE_ZLIB
+#define NXT_HTTP_COMP_ZLIB_DEFAULT_LEVEL       Z_DEFAULT_COMPRESSION
+#define NXT_HTTP_COMP_ZLIB_COMP_MIN            Z_DEFAULT_COMPRESSION
+#define NXT_HTTP_COMP_ZLIB_COMP_MAX            Z_BEST_COMPRESSION
+#endif
+
+
 typedef struct nxt_http_comp_compressor_ctx_s  nxt_http_comp_compressor_ctx_t;
 typedef struct nxt_http_comp_operations_s      nxt_http_comp_operations_t;
 
@@ -25,6 +36,9 @@ struct nxt_http_comp_compressor_ctx_s {
     int8_t level;
 
     union {
+#if NXT_HAVE_ZLIB
+        z_stream zlib_ctx;
+#endif
     };
 };
 
@@ -38,6 +52,12 @@ struct nxt_http_comp_operations_s {
 };
 
 
+#if NXT_HAVE_ZLIB
+extern const nxt_http_comp_operations_t  nxt_http_comp_deflate_ops;
+extern const nxt_http_comp_operations_t  nxt_http_comp_gzip_ops;
+#endif
+
+
 extern bool nxt_http_comp_wants_compression(void);
 extern bool nxt_http_comp_compressor_is_valid(const nxt_str_t *token);
 extern nxt_int_t nxt_http_comp_check_compression(nxt_task_t *task,