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Gzip: support for zlib-ng.

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This commit is contained in:
Maxim Dounin 2021-04-05 04:06:58 +03:00
parent d23f77b028
commit e3797a66a3
1 changed files with 21 additions and 2 deletions
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23
src/http/modules/ngx_http_gzip_filter_module.c
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@ -57,6 +57,7 @@ typedef struct {
unsigned nomem:1;
unsigned buffering:1;
unsigned intel:1;
unsigned zlib_ng:1;
size_t zin;
size_t zout;
@ -214,6 +215,7 @@ static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
static ngx_uint_t ngx_http_gzip_assume_intel;
static ngx_uint_t ngx_http_gzip_assume_zlib_ng;
static ngx_int_t
@ -506,7 +508,7 @@ ngx_http_gzip_filter_memory(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
if (!ngx_http_gzip_assume_intel) {
ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9));
} else {
} else if (!ngx_http_gzip_assume_zlib_ng) {
/*
* A zlib variant from Intel, https://github.com/jtkukunas/zlib.
* It can force window bits to 13 for fast compression level,
@ -523,6 +525,20 @@ ngx_http_gzip_filter_memory(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
+ (1 << (ngx_max(memlevel, 8) + 8))
+ (1 << (memlevel + 8));
ctx->intel = 1;
} else {
/*
* Another zlib variant, https://github.com/zlib-ng/zlib-ng.
* Similar to Intel's variant, though uses 128K hash.
*/
if (conf->level == 1) {
wbits = ngx_max(wbits, 13);
}
ctx->allocated = 8192 + 16 + (1 << (wbits + 2))
+ 131072 + (1 << (memlevel + 8));
ctx->zlib_ng = 1;
}
}
@ -945,11 +961,14 @@ ngx_http_gzip_filter_alloc(void *opaque, u_int items, u_int size)
return p;
}
if (ctx->intel) {
if (ctx->zlib_ng) {
ngx_log_error(NGX_LOG_ALERT, ctx->request->connection->log, 0,
"gzip filter failed to use preallocated memory: "
"%ud of %ui", items * size, ctx->allocated);
} else if (ctx->intel) {
ngx_http_gzip_assume_zlib_ng = 1;
} else {
ngx_http_gzip_assume_intel = 1;
}