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Access log: the "gzip" parameter of the "access_log" directive.
Note: this requires zlib version 1.2.0.4 or above to work.
This commit is contained in:
Valentin Bartenev
parent
e90df45519
commit
70d1a45c7c
@ -9,6 +9,10 @@
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#include <ngx_core.h>
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#include <ngx_http.h>
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#if (NGX_ZLIB)
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#include <zlib.h>
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#endif
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typedef struct ngx_http_log_op_s ngx_http_log_op_t;
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@ -47,6 +51,7 @@ typedef struct {
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ngx_event_t *event;
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ngx_msec_t flush;
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ngx_int_t gzip;
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} ngx_http_log_buf_t;
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@ -88,6 +93,14 @@ static void ngx_http_log_write(ngx_http_request_t *r, ngx_http_log_t *log,
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static ssize_t ngx_http_log_script_write(ngx_http_request_t *r,
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ngx_http_log_script_t *script, u_char **name, u_char *buf, size_t len);
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#if (NGX_ZLIB)
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static ssize_t ngx_http_log_gzip(ngx_fd_t fd, u_char *buf, size_t len,
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ngx_int_t level, ngx_log_t *log);
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static void *ngx_http_log_gzip_alloc(void *opaque, u_int items, u_int size);
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static void ngx_http_log_gzip_free(void *opaque, void *address);
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#endif
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static void ngx_http_log_flush(ngx_open_file_t *file, ngx_log_t *log);
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static void ngx_http_log_flush_handler(ngx_event_t *ev);
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@ -331,14 +344,29 @@ static void
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ngx_http_log_write(ngx_http_request_t *r, ngx_http_log_t *log, u_char *buf,
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size_t len)
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{
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u_char *name;
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time_t now;
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ssize_t n;
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ngx_err_t err;
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u_char *name;
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time_t now;
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ssize_t n;
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ngx_err_t err;
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#if (NGX_ZLIB)
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ngx_http_log_buf_t *buffer;
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#endif
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if (log->script == NULL) {
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name = log->file->name.data;
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#if (NGX_ZLIB)
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buffer = log->file->data;
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if (buffer && buffer->gzip) {
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n = ngx_http_log_gzip(log->file->fd, buf, len, buffer->gzip,
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r->connection->log);
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} else {
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n = ngx_write_fd(log->file->fd, buf, len);
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}
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#else
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n = ngx_write_fd(log->file->fd, buf, len);
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#endif
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} else {
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name = NULL;
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@ -486,6 +514,140 @@ ngx_http_log_script_write(ngx_http_request_t *r, ngx_http_log_script_t *script,
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}
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#if (NGX_ZLIB)
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static ssize_t
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ngx_http_log_gzip(ngx_fd_t fd, u_char *buf, size_t len, ngx_int_t level,
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ngx_log_t *log)
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{
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int rc, wbits, memlevel;
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u_char *out;
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size_t size;
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ssize_t n;
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z_stream zstream;
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ngx_err_t err;
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ngx_pool_t *pool;
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wbits = MAX_WBITS;
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memlevel = MAX_MEM_LEVEL - 1;
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while ((ssize_t) len < ((1 << (wbits - 1)) - 262)) {
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wbits--;
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memlevel--;
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}
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/*
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* This is a formula from deflateBound() for conservative upper bound of
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* compressed data plus 18 bytes of gzip wrapper.
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*/
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size = len + ((len + 7) >> 3) + ((len + 63) >> 6) + 5 + 18;
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ngx_memzero(&zstream, sizeof(z_stream));
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pool = ngx_create_pool(256, log);
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if (pool == NULL) {
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/* simulate successful logging */
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return len;
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}
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pool->log = log;
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zstream.zalloc = ngx_http_log_gzip_alloc;
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zstream.zfree = ngx_http_log_gzip_free;
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zstream.opaque = pool;
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out = ngx_pnalloc(pool, size);
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if (out == NULL) {
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goto done;
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}
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zstream.next_in = buf;
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zstream.avail_in = len;
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zstream.next_out = out;
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zstream.avail_out = size;
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rc = deflateInit2(&zstream, (int) level, Z_DEFLATED, wbits + 16, memlevel,
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Z_DEFAULT_STRATEGY);
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if (rc != Z_OK) {
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ngx_log_error(NGX_LOG_ALERT, log, 0, "deflateInit2() failed: %d", rc);
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goto done;
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}
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ngx_log_debug4(NGX_LOG_DEBUG_HTTP, log, 0,
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"deflate in: ni:%p no:%p ai:%ud ao:%ud",
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zstream.next_in, zstream.next_out,
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zstream.avail_in, zstream.avail_out);
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rc = deflate(&zstream, Z_FINISH);
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if (rc != Z_STREAM_END) {
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ngx_log_error(NGX_LOG_ALERT, log, 0,
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"deflate(Z_FINISH) failed: %d", rc);
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goto done;
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}
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ngx_log_debug5(NGX_LOG_DEBUG_HTTP, log, 0,
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"deflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d",
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zstream.next_in, zstream.next_out,
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zstream.avail_in, zstream.avail_out,
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rc);
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size -= zstream.avail_out;
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rc = deflateEnd(&zstream);
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if (rc != Z_OK) {
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ngx_log_error(NGX_LOG_ALERT, log, 0, "deflateEnd() failed: %d", rc);
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goto done;
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}
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n = ngx_write_fd(fd, out, size);
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if (n != (ssize_t) size) {
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err = (n == -1) ? ngx_errno : 0;
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ngx_destroy_pool(pool);
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ngx_set_errno(err);
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return -1;
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}
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done:
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ngx_destroy_pool(pool);
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/* simulate successful logging */
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return len;
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}
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static void *
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ngx_http_log_gzip_alloc(void *opaque, u_int items, u_int size)
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{
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ngx_pool_t *pool = opaque;
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ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pool->log, 0,
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"gzip alloc: n:%ud s:%ud", items, size);
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return ngx_palloc(pool, items * size);
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}
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static void
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ngx_http_log_gzip_free(void *opaque, void *address)
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{
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#if 0
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ngx_pool_t *pool = opaque;
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ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pool->log, 0, "gzip free: %p", address);
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#endif
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}
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#endif
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static void
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ngx_http_log_flush(ngx_open_file_t *file, ngx_log_t *log)
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{
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@ -501,7 +663,15 @@ ngx_http_log_flush(ngx_open_file_t *file, ngx_log_t *log)
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return;
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}
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#if (NGX_ZLIB)
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if (buffer->gzip) {
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n = ngx_http_log_gzip(file->fd, buffer->start, len, buffer->gzip, log);
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} else {
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n = ngx_write_fd(file->fd, buffer->start, len);
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}
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#else
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n = ngx_write_fd(file->fd, buffer->start, len);
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#endif
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if (n == -1) {
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ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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@ -916,6 +1086,7 @@ ngx_http_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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ngx_http_log_loc_conf_t *llcf = conf;
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ssize_t size;
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ngx_int_t gzip;
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ngx_uint_t i, n;
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ngx_msec_t flush;
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ngx_str_t *value, name, s;
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@ -1017,6 +1188,7 @@ ngx_http_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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size = 0;
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flush = 0;
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gzip = 0;
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for (i = 3; i < cf->args->nelts; i++) {
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@ -1050,6 +1222,39 @@ ngx_http_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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continue;
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}
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if (ngx_strncmp(value[i].data, "gzip", 4) == 0
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&& (value[i].len == 4 || value[i].data[4] == '='))
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{
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#if (NGX_ZLIB)
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if (size == 0) {
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size = 64 * 1024;
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}
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if (value[i].len == 4) {
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gzip = Z_BEST_SPEED;
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continue;
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}
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s.len = value[i].len - 5;
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s.data = value[i].data + 5;
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gzip = ngx_atoi(s.data, s.len);
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if (gzip < 1 || gzip > 9) {
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ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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"invalid compression level \"%V\"", &s);
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return NGX_CONF_ERROR;
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}
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continue;
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#else
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ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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"nginx was built without zlib support");
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return NGX_CONF_ERROR;
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#endif
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}
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ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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"invalid parameter \"%V\"", &value[i]);
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return NGX_CONF_ERROR;
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@ -1074,7 +1279,8 @@ ngx_http_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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buffer = log->file->data;
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if (buffer->last - buffer->start != size
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|| buffer->flush != flush)
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|| buffer->flush != flush
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|| buffer->gzip != gzip)
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{
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ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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"access_log \"%V\" already defined "
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@ -1112,6 +1318,8 @@ ngx_http_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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buffer->flush = flush;
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}
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buffer->gzip = gzip;
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log->file->flush = ngx_http_log_flush;
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log->file->data = buffer;
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}
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