static ngx_int_t
ngx_http_foo_header_filter(ngx_http_request_t *r)
{
ngx_log_error(NGX_LOG_NOTICE, r->connection->log, 0, "Header filter add header");
ngx_table_elt_t *h;
/*
* The filter handler adds "X-Foo: foo" header
* to every HTTP 200 response
*/
if (r->headers_out.status != NGX_HTTP_OK) {
return ngx_http_next_header_filter(r);
}
h = ngx_list_push(&r->headers_out.headers);
if (h == NULL) {
return NGX_ERROR;
}
h->hash = 1;
ngx_str_set(&h->key, "X-Foo");
ngx_str_set(&h->value, "foo");
ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
ngx_http_weak_etag(r);
return ngx_http_next_header_filter(r);
}
static ngx_int_t
ngx_http_addition_header_filter(ngx_http_request_t *r)
{
ngx_http_addition_ctx_t *ctx;
ngx_http_addition_conf_t *conf;
if (r->headers_out.status != NGX_HTTP_OK || r != r->main) {
return ngx_http_next_header_filter(r);
}
conf = ngx_http_get_module_loc_conf(r, ngx_http_addition_filter_module);
if (conf->before_body.len == 0 && conf->after_body.len == 0) {
return ngx_http_next_header_filter(r);
}
if (ngx_http_test_content_type(r, &conf->types) == NULL) {
return ngx_http_next_header_filter(r);
}
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_addition_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
ngx_http_set_ctx(r, ctx, ngx_http_addition_filter_module);
ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
ngx_http_weak_etag(r);
return ngx_http_next_header_filter(r);
}
static ngx_int_t
ngx_http_gunzip_header_filter(ngx_http_request_t *r)
{
ngx_http_gunzip_ctx_t *ctx;
ngx_http_gunzip_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r, ngx_http_gunzip_filter_module);
/* TODO support multiple content-codings */
/* TODO ignore content encoding? */
if (conf->enable == NGX_HTTP_GUNZIP_OFF
|| r->headers_out.content_encoding == NULL
|| r->headers_out.content_encoding->value.len != 4
|| ngx_strncasecmp(r->headers_out.content_encoding->value.data,
(u_char *) "gzip", 4) != 0)
{
return ngx_http_next_header_filter(r);
}
r->gzip_vary = 1;
if (conf->enable == NGX_HTTP_GUNZIP_ON) {
if (!r->gzip_tested) {
if (ngx_http_gzip_ok(r) == NGX_OK) {
return ngx_http_next_header_filter(r);
}
} else if (r->gzip_ok) {
return ngx_http_next_header_filter(r);
}
} else if (conf->enable == NGX_HTTP_GUNZIP_ALWAYS
&& ngx_http_test_content_type(r, &conf->types) == NULL)
{
return ngx_http_next_header_filter(r);
}
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gunzip_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
ngx_http_set_ctx(r, ctx, ngx_http_gunzip_filter_module);
ctx->request = r;
r->filter_need_in_memory = 1;
r->headers_out.content_encoding->hash = 0;
r->headers_out.content_encoding = NULL;
ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
ngx_http_weak_etag(r);
return ngx_http_next_header_filter(r);
}
static ngx_int_t
ngx_http_sub_header_filter(ngx_http_request_t *r)
{
ngx_http_sub_ctx_t *ctx;
ngx_http_sub_loc_conf_t *slcf;
slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module);
if (slcf->match.len == 0
|| r->headers_out.content_length_n == 0
|| ngx_http_test_content_type(r, &slcf->types) == NULL)
{
return ngx_http_next_header_filter(r);
}
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
ctx->saved.data = ngx_pnalloc(r->pool, slcf->match.len);
if (ctx->saved.data == NULL) {
return NGX_ERROR;
}
ctx->looked.data = ngx_pnalloc(r->pool, slcf->match.len);
if (ctx->looked.data == NULL) {
return NGX_ERROR;
}
ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module);
ctx->match = slcf->match;
ctx->last_out = &ctx->out;
r->filter_need_in_memory = 1;
if (r == r->main) {
ngx_http_clear_content_length(r);
if (!slcf->last_modified) {
ngx_http_clear_last_modified(r);
ngx_http_clear_etag(r);
} else {
ngx_http_weak_etag(r);
}
}
return ngx_http_next_header_filter(r);
}
static ngx_int_t
ngx_http_brotli_header_filter(ngx_http_request_t *r)
{
ngx_table_elt_t *h;
ngx_http_brotli_ctx_t *ctx;
ngx_http_brotli_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r, ngx_http_brotli_filter_module);
if (!conf->enable
|| (r->headers_out.status != NGX_HTTP_OK
&& r->headers_out.status != NGX_HTTP_FORBIDDEN
&& r->headers_out.status != NGX_HTTP_NOT_FOUND)
|| (r->headers_out.content_length_n != -1
&& r->headers_out.content_length_n < conf->min_length)
|| ngx_http_test_content_type(r, &conf->types) == NULL
|| r->header_only)
{
return ngx_http_next_header_filter(r);
}
if (r->headers_out.content_encoding
&& r->headers_out.content_encoding->value.len)
{
return ngx_http_next_header_filter(r);
}
/* Check that brotli is supported. We do not check possible q value
* if brotli is supported it takes precendence over gzip if size >
* brotli_min_length */
if (accept_br(r->headers_in.accept_encoding) != NGX_OK) {
return ngx_http_next_header_filter(r);
}
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_brotli_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
#if (NGX_HTTP_GZIP)
r->gzip_vary = 1;
/* Make sure gzip does not execute */
r->gzip_tested = 1;
r->gzip_ok = 0;
#endif
ngx_http_set_ctx(r, ctx, ngx_http_brotli_filter_module);
ctx->request = r;
h = ngx_list_push(&r->headers_out.headers);
if (h == NULL) {
return NGX_ERROR;
}
h->hash = 1;
ngx_str_set(&h->key, "Content-Encoding");
ngx_str_set(&h->value, "br");
r->headers_out.content_encoding = h;
r->main_filter_need_in_memory = 1;
ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
ngx_http_weak_etag(r);
return ngx_http_next_header_filter(r);
}
static ngx_int_t
ngx_http_concat_handler(ngx_http_request_t *r)
{
off_t length;
size_t root, last_len;
time_t last_modified;
u_char *p, *v, *e, *last, *last_type;
ngx_int_t rc;
ngx_str_t *uri, *filename, path;
ngx_buf_t *b;
ngx_uint_t i, j, level;
ngx_flag_t timestamp;
ngx_array_t uris;
ngx_chain_t out, **last_out, *cl;
ngx_open_file_info_t of;
ngx_http_core_loc_conf_t *ccf;
ngx_http_concat_loc_conf_t *clcf;
if (r->uri.data[r->uri.len - 1] != '/') {
return NGX_DECLINED;
}
if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
return NGX_DECLINED;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_concat_module);
if (!clcf->enable) {
return NGX_DECLINED;
}
/* the length of args must be greater than or equal to 2 */
if (r->args.len < 2 || r->args.data[0] != '?') {
return NGX_DECLINED;
}
rc = ngx_http_discard_request_body(r);
if (rc != NGX_OK) {
return rc;
}
last = ngx_http_map_uri_to_path(r, &path, &root, 0);
if (last == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
path.len = last - path.data;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http concat root: \"%V\"", &path);
ccf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
#if (NGX_SUPPRESS_WARN)
ngx_memzero(&uris, sizeof(ngx_array_t));
#endif
if (ngx_array_init(&uris, r->pool, 8, sizeof(ngx_str_t)) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
e = r->args.data + r->args.len;
for (p = r->args.data + 1, v = p, timestamp = 0; p != e; p++) {
if (*p == ',') {
if (p == v || timestamp == 1) {
v = p + 1;
timestamp = 0;
continue;
}
rc = ngx_http_concat_add_path(r, &uris, clcf->max_files, &path,
p, v);
if (rc != NGX_OK) {
return rc;
}
v = p + 1;
} else if (*p == '?') {
if (timestamp == 1) {
v = p;
continue;
}
rc = ngx_http_concat_add_path(r, &uris, clcf->max_files, &path,
p, v);
if (rc != NGX_OK) {
return rc;
}
v = p;
timestamp = 1;
}
}
if (p - v > 0 && timestamp == 0) {
rc = ngx_http_concat_add_path(r, &uris, clcf->max_files, &path, p, v);
if (rc != NGX_OK) {
return rc;
}
}
last_modified = 0;
last_len = 0;
last_out = NULL;
b = NULL;
last_type = NULL;
length = 0;
uri = uris.elts;
for (i = 0; i < uris.nelts; i++) {
filename = uri + i;
for (j = filename->len - 1; j > 1; j--) {
if (filename->data[j] == '.' && filename->data[j - 1] != '/') {
r->exten.len = filename->len - j - 1;
r->exten.data = &filename->data[j + 1];
break;
} else if (filename->data[j] == '/') {
break;
}
}
r->headers_out.content_type.len = 0;
if (ngx_http_set_content_type(r) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->headers_out.content_type_lowcase = NULL;
if (ngx_http_test_content_type(r, &clcf->types) == NULL) {
return NGX_HTTP_BAD_REQUEST;
}
if (clcf->unique) { /* test if all the content types are the same */
if ((i > 0)
&& (last_len != r->headers_out.content_type_len
|| (last_type != NULL
&& r->headers_out.content_type_lowcase != NULL
&& ngx_memcmp(last_type,
r->headers_out.content_type_lowcase,
last_len) != 0)))
{
return NGX_HTTP_BAD_REQUEST;
}
last_len = r->headers_out.content_type_len;
last_type = r->headers_out.content_type_lowcase;
}
ngx_memzero(&of, sizeof(ngx_open_file_info_t));
of.read_ahead = ccf->read_ahead;
of.directio = ccf->directio;
of.valid = ccf->open_file_cache_valid;
of.min_uses = ccf->open_file_cache_min_uses;
of.errors = ccf->open_file_cache_errors;
of.events = ccf->open_file_cache_events;
if (ngx_open_cached_file(ccf->open_file_cache, filename, &of, r->pool)
!= NGX_OK)
{
switch (of.err) {
case 0:
return NGX_HTTP_INTERNAL_SERVER_ERROR;
case NGX_ENOENT:
case NGX_ENOTDIR:
case NGX_ENAMETOOLONG:
level = NGX_LOG_ERR;
rc = NGX_HTTP_NOT_FOUND;
break;
case NGX_EACCES:
level = NGX_LOG_ERR;
rc = NGX_HTTP_FORBIDDEN;
break;
default:
level = NGX_LOG_CRIT;
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
break;
}
if (rc != NGX_HTTP_NOT_FOUND || ccf->log_not_found) {
ngx_log_error(level, r->connection->log, of.err,
"%s \"%V\" failed", of.failed, filename);
}
if (clcf->ignore_file_error
&& (rc == NGX_HTTP_NOT_FOUND || rc == NGX_HTTP_FORBIDDEN))
{
continue;
}
return rc;
}
if (!of.is_file) {
ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
"\"%V\" is not a regular file", filename);
if (clcf->ignore_file_error) {
continue;
}
return NGX_HTTP_NOT_FOUND;
}
if (of.size == 0) {
continue;
}
length += of.size;
if (last_out == NULL) {
last_modified = of.mtime;
} else {
if (of.mtime > last_modified) {
last_modified = of.mtime;
}
}
b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
if (b == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
if (b->file == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->file_pos = 0;
b->file_last = of.size;
b->in_file = b->file_last ? 1 : 0;
b->file->fd = of.fd;
b->file->name = *filename;
b->file->log = r->connection->log;
b->file->directio = of.is_directio;
if (last_out == NULL) {
out.buf = b;
last_out = &out.next;
out.next = NULL;
} else {
cl = ngx_alloc_chain_link(r->pool);
if (cl == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
cl->buf = b;
*last_out = cl;
last_out = &cl->next;
cl->next = NULL;
}
if (i + 1 == uris.nelts || clcf->delimiter.len == 0) {
continue;
}
b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
if (b == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
b->pos = clcf->delimiter.data;
b->last = b->pos + clcf->delimiter.len;
b->memory = 1;
length += clcf->delimiter.len;
cl = ngx_alloc_chain_link(r->pool);
if (cl == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
cl->buf = b;
*last_out = cl;
last_out = &cl->next;
cl->next = NULL;
}
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = length;
r->headers_out.last_modified_time = last_modified;
if (ngx_http_set_etag(r) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_http_weak_etag(r);
if (b == NULL) {
r->header_only = 1;
}
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc;
}
if (b != NULL) {
b->last_in_chain = 1;
b->last_buf = 1;
}
return ngx_http_output_filter(r, &out);
}
static ngx_buf_t *
ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
{
int sx, sy, dx, dy, ox, oy, ax, ay, size,
colors, palette, transparent, sharpen,
red, green, blue, t;
u_char *out;
ngx_buf_t *b;
ngx_uint_t resize;
gdImagePtr src, dst;
ngx_pool_cleanup_t *cln;
ngx_http_image_filter_conf_t *conf;
src = ngx_http_image_source(r, ctx);
if (src == NULL) {
return NULL;
}
sx = gdImageSX(src);
sy = gdImageSY(src);
conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
if (!ctx->force
&& ctx->angle == 0
&& (ngx_uint_t) sx <= ctx->max_width
&& (ngx_uint_t) sy <= ctx->max_height)
{
gdImageDestroy(src);
return ngx_http_image_asis(r, ctx);
}
colors = gdImageColorsTotal(src);
if (colors && conf->transparency) {
transparent = gdImageGetTransparent(src);
if (transparent != -1) {
palette = colors;
red = gdImageRed(src, transparent);
green = gdImageGreen(src, transparent);
blue = gdImageBlue(src, transparent);
goto transparent;
}
}
palette = 0;
transparent = -1;
red = 0;
green = 0;
blue = 0;
transparent:
gdImageColorTransparent(src, -1);
dx = sx;
dy = sy;
if (conf->filter == NGX_HTTP_IMAGE_RESIZE) {
if ((ngx_uint_t) dx > ctx->max_width) {
dy = dy * ctx->max_width / dx;
dy = dy ? dy : 1;
dx = ctx->max_width;
}
if ((ngx_uint_t) dy > ctx->max_height) {
dx = dx * ctx->max_height / dy;
dx = dx ? dx : 1;
dy = ctx->max_height;
}
resize = 1;
} else if (conf->filter == NGX_HTTP_IMAGE_ROTATE) {
resize = 0;
} else if (conf->filter == NGX_HTTP_IMAGE_WATERMARK) {
resize = 0;
} else { /* NGX_HTTP_IMAGE_CROP */
resize = 0;
if ((double) dx / dy < (double) ctx->max_width / ctx->max_height) {
if ((ngx_uint_t) dx > ctx->max_width) {
dy = dy * ctx->max_width / dx;
dy = dy ? dy : 1;
dx = ctx->max_width;
resize = 1;
}
} else {
if ((ngx_uint_t) dy > ctx->max_height) {
dx = dx * ctx->max_height / dy;
dx = dx ? dx : 1;
dy = ctx->max_height;
resize = 1;
}
}
}
if (resize) {
dst = ngx_http_image_new(r, dx, dy, palette);
if (dst == NULL) {
gdImageDestroy(src);
return NULL;
}
if (colors == 0) {
gdImageSaveAlpha(dst, 1);
gdImageAlphaBlending(dst, 0);
}
gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy);
if (colors) {
gdImageTrueColorToPalette(dst, 1, 256);
}
gdImageDestroy(src);
} else {
dst = src;
}
if (ctx->angle) {
src = dst;
ax = (dx % 2 == 0) ? 1 : 0;
ay = (dy % 2 == 0) ? 1 : 0;
switch (ctx->angle) {
case 90:
case 270:
dst = ngx_http_image_new(r, dy, dx, palette);
if (dst == NULL) {
gdImageDestroy(src);
return NULL;
}
if (ctx->angle == 90) {
ox = dy / 2 + ay;
oy = dx / 2 - ax;
} else {
ox = dy / 2 - ay;
oy = dx / 2 + ax;
}
gdImageCopyRotated(dst, src, ox, oy, 0, 0,
dx + ax, dy + ay, ctx->angle);
gdImageDestroy(src);
t = dx;
dx = dy;
dy = t;
break;
case 180:
dst = ngx_http_image_new(r, dx, dy, palette);
if (dst == NULL) {
gdImageDestroy(src);
return NULL;
}
gdImageCopyRotated(dst, src, dx / 2 - ax, dy / 2 - ay, 0, 0,
dx + ax, dy + ay, ctx->angle);
gdImageDestroy(src);
break;
}
}
if (conf->filter == NGX_HTTP_IMAGE_CROP) {
src = dst;
if ((ngx_uint_t) dx > ctx->max_width) {
ox = dx - ctx->max_width;
} else {
ox = 0;
}
if ((ngx_uint_t) dy > ctx->max_height) {
oy = dy - ctx->max_height;
} else {
oy = 0;
}
if (ox || oy) {
dst = ngx_http_image_new(r, dx - ox, dy - oy, colors);
if (dst == NULL) {
gdImageDestroy(src);
return NULL;
}
ox /= 2;
oy /= 2;
ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"image crop: %d x %d @ %d x %d",
dx, dy, ox, oy);
if (colors == 0) {
gdImageSaveAlpha(dst, 1);
gdImageAlphaBlending(dst, 0);
}
gdImageCopy(dst, src, 0, 0, ox, oy, dx - ox, dy - oy);
if (colors) {
gdImageTrueColorToPalette(dst, 1, 256);
}
gdImageDestroy(src);
}
}
if (transparent != -1 && colors) {
gdImageColorTransparent(dst, gdImageColorExact(dst, red, green, blue));
}
if (conf->filter == NGX_HTTP_IMAGE_WATERMARK && conf->watermark.data) {
FILE *watermark_file = fopen((const char *)conf->watermark.data, "r");
if (watermark_file) {
gdImagePtr watermark, watermark_mix;
ngx_int_t wdx = 0, wdy = 0;
watermark = gdImageCreateFromPng(watermark_file);
fclose(watermark_file);
if(watermark != NULL) {
watermark_mix = gdImageCreateTrueColor(watermark->sx, watermark->sy);
if (ngx_strcmp(conf->watermark_position.data, "bottom-right") == 0) {
wdx = dx - watermark->sx - 10;
wdy = dy - watermark->sy - 10;
} else if (ngx_strcmp(conf->watermark_position.data, "top-left") == 0) {
wdx = wdy = 10;
} else if (ngx_strcmp(conf->watermark_position.data, "top-right") == 0) {
wdx = dx - watermark->sx - 10;
wdy = 10;
} else if (ngx_strcmp(conf->watermark_position.data, "bottom-left") == 0) {
wdx = 10;
wdy = dy - watermark->sy - 10;
} else if (ngx_strcmp(conf->watermark_position.data, "center") == 0) {
wdx = dx / 2 - watermark->sx / 2;
wdy = dy / 2 - watermark->sy / 2;
}
gdImageCopy(watermark_mix, dst, 0, 0, wdx, wdy, watermark->sx, watermark->sy);
gdImageCopy(watermark_mix, watermark, 0, 0, 0, 0, watermark->sx, watermark->sy);
gdImageCopyMerge(dst, watermark_mix, wdx, wdy, 0, 0, watermark->sx, watermark->sy, 75);
gdImageDestroy(watermark);
gdImageDestroy(watermark_mix);
} else { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "watermark file '%s' is not PNG", conf->watermark.data);}
} else {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "watermark file '%s' not found", conf->watermark.data);
}
}
sharpen = ngx_http_image_filter_get_value(r, conf->shcv, conf->sharpen);
if (sharpen > 0) {
gdImageSharpen(dst, sharpen);
}
gdImageInterlace(dst, (int) conf->interlace);
out = ngx_http_image_out(r, ctx->type, dst, &size);
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"image: %d x %d %d", sx, sy, colors);
gdImageDestroy(dst);
ngx_pfree(r->pool, ctx->image);
if (out == NULL) {
return NULL;
}
cln = ngx_pool_cleanup_add(r->pool, 0);
if (cln == NULL) {
gdFree(out);
return NULL;
}
b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
if (b == NULL) {
gdFree(out);
return NULL;
}
cln->handler = ngx_http_image_cleanup;
cln->data = out;
b->pos = out;
b->last = out + size;
b->memory = 1;
b->last_buf = 1;
ngx_http_image_length(r, b);
ngx_http_weak_etag(r);
return b;
}
static ngx_buf_t *
ngx_http_pngquant_quantize(ngx_http_request_t *r, ngx_http_pngquant_ctx_t *ctx)
{
u_char *out;
ngx_buf_t *b;
ngx_pool_cleanup_t *cln;
ngx_http_pngquant_conf_t *conf;
gdImagePtr img;
int size;
ngx_int_t rc;
ngx_temp_file_t *tf;
ssize_t n;
ngx_ext_rename_file_t ext;
ngx_str_t dest;
ngx_str_t value;
img = gdImageCreateFromPngPtr(ctx->length, ctx->image);
if (img == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"gdImageCreateFromPngPtr() failed");
return NULL;
}
conf = ngx_http_get_module_loc_conf(r, ngx_http_pngquant_module);
/*
* gdImageTrueColorToPaletteSetMethod(img, GD_QUANT_LIQ, conf->speed);
* gdImageTrueColorToPalette(img, conf->dither, conf->colors);
*/
ngx_pngquant_gd_image(img, conf->dither, conf->colors, conf->speed);
out = gdImagePngPtr(img, &size);
gdImageDestroy(img);
ngx_pfree(r->pool, ctx->image);
if (out == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"gdImagePngPtr() failed");
return NULL;
}
if (conf->store) {
if(ngx_http_complex_value(r, conf->store, &value) != NGX_OK) {
goto failed;
}
dest.len = value.len + 1;
dest.data = ngx_pnalloc(r->pool, dest.len);
if (dest.data == NULL) {
goto failed;
}
ngx_memzero(dest.data, dest.len);
ngx_memcpy(dest.data, value.data, value.len);
ngx_log_debug(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"pngquant_store (%s)", dest.data);
tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
if (tf == NULL) {
goto failed;
}
tf->file.fd = NGX_INVALID_FILE;
tf->file.log = r->connection->log;
tf->path = conf->temp_path;
tf->pool = r->pool;
tf->persistent = 1;
rc = ngx_create_temp_file(&tf->file, tf->path, tf->pool, tf->persistent,
tf->clean, tf->access);
if (rc != NGX_OK) {
goto failed;
}
n = ngx_write_fd(tf->file.fd, out, size);
if (n == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
ngx_write_fd_n " \"%s\" failed", tf->file.name.data);
goto failed;
}
if ((int) n != size) {
ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
ngx_write_fd_n " has written only %z of %uz bytes",
n, size);
goto failed;
}
ext.access = conf->store_access;
ext.path_access = conf->store_access;
ext.time = -1;
ext.create_path = 1;
ext.delete_file = 1;
ext.log = r->connection->log;
rc = ngx_ext_rename_file(&tf->file.name, &dest, &ext);
if (rc != NGX_OK) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_ext_rename_file() failed");
goto failed;
}
}
cln = ngx_pool_cleanup_add(r->pool, 0);
if (cln == NULL) {
goto failed;
}
b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
if (b == NULL) {
goto failed;
}
cln->handler = ngx_http_pngquant_cleanup;
cln->data = out;
b->pos = out;
b->last = out + size;
b->memory = 1;
b->last_buf = 1;
ngx_http_pngquant_length(r, b);
#if defined(nginx_version) && (nginx_version >= 1007003)
ngx_http_weak_etag(r);
#endif
return b;
failed:
gdFree(out);
return NULL;
}
static ngx_int_t
ngx_http_sub_header_filter(ngx_http_request_t *r)
{
ngx_str_t *m;
ngx_uint_t i, j, n;
ngx_http_sub_ctx_t *ctx;
ngx_http_sub_pair_t *pairs;
ngx_http_sub_match_t *matches;
ngx_http_sub_loc_conf_t *slcf;
slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module);
if (slcf->pairs == NULL
|| r->headers_out.content_length_n == 0
|| ngx_http_test_content_type(r, &slcf->types) == NULL)
{
return ngx_http_next_header_filter(r);
}
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
if (slcf->dynamic == 0) {
ctx->tables = slcf->tables;
ctx->matches = slcf->matches;
} else {
pairs = slcf->pairs->elts;
n = slcf->pairs->nelts;
matches = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_match_t) * n);
if (matches == NULL) {
return NGX_ERROR;
}
j = 0;
for (i = 0; i < n; i++) {
matches[j].value = &pairs[i].value;
if (pairs[i].match.lengths == NULL) {
matches[j].match = pairs[i].match.value;
j++;
continue;
}
m = &matches[j].match;
if (ngx_http_complex_value(r, &pairs[i].match, m) != NGX_OK) {
return NGX_ERROR;
}
if (m->len == 0) {
continue;
}
ngx_strlow(m->data, m->data, m->len);
j++;
}
if (j == 0) {
return ngx_http_next_header_filter(r);
}
ctx->matches = ngx_palloc(r->pool, sizeof(ngx_array_t));
if (ctx->matches == NULL) {
return NGX_ERROR;
}
ctx->matches->elts = matches;
ctx->matches->nelts = j;
ctx->tables = ngx_palloc(r->pool, sizeof(ngx_http_sub_tables_t));
if (ctx->tables == NULL) {
return NGX_ERROR;
}
ngx_http_sub_init_tables(ctx->tables, ctx->matches->elts,
ctx->matches->nelts);
}
ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module);
ctx->saved.data = ngx_pnalloc(r->pool, ctx->tables->max_match_len - 1);
if (ctx->saved.data == NULL) {
return NGX_ERROR;
}
ctx->looked.data = ngx_pnalloc(r->pool, ctx->tables->max_match_len - 1);
if (ctx->looked.data == NULL) {
return NGX_ERROR;
}
ctx->offset = ctx->tables->min_match_len - 1;
ctx->last_out = &ctx->out;
r->filter_need_in_memory = 1;
if (r == r->main) {
ngx_http_clear_content_length(r);
if (!slcf->last_modified) {
ngx_http_clear_last_modified(r);
ngx_http_clear_etag(r);
} else {
ngx_http_weak_etag(r);
}
}
return ngx_http_next_header_filter(r);
}
static ngx_int_t
ngx_http_brotli_header_filter(ngx_http_request_t *r)
{
ngx_table_elt_t *h, *ae;
ngx_http_brotli_ctx_t *ctx;
ngx_http_brotli_conf_t *conf;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http brotli header filter");
conf = ngx_http_get_module_loc_conf(r, ngx_http_brotli_filter_module);
if (!conf->enable
|| (r->headers_out.status != NGX_HTTP_OK
&& r->headers_out.status != NGX_HTTP_FORBIDDEN
&& r->headers_out.status != NGX_HTTP_NOT_FOUND)
|| (r->headers_out.content_encoding
&& r->headers_out.content_encoding->value.len)
|| (r->headers_out.content_length_n != -1
&& r->headers_out.content_length_n < conf->min_length)
|| ngx_http_test_content_type(r, &conf->types) == NULL
|| r->header_only)
{
return ngx_http_next_header_filter(r);
}
/* Check that brotli is supported. We do not check possible q value
* if brotli is supported it takes precendence over gzip if size >
* brotli_min_length */
ae = r->headers_in.accept_encoding;
if(!ae) {
return ngx_http_next_header_filter(r);
}
/* Since there is no reason for the br string to be present
* unless brotli is accepted either as "br" or "brotli" we
* just check for "br" */
if (!ngx_strstrn(ae->value.data, "br", 1)) {
return ngx_http_next_header_filter(r);
}
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_brotli_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
if (ngx_strstrn(ae->value.data, "brotli", 5)) {
ctx->br = 0;
} else {
ctx->br = 1;
}
#if (NGX_HTTP_GZIP)
r->gzip_vary = 1;
/* Make sure gzip does not execute */
r->gzip_tested = 1;
r->gzip_ok = 0;
#endif
ngx_http_set_ctx(r, ctx, ngx_http_brotli_filter_module);
ctx->request = r;
h = ngx_list_push(&r->headers_out.headers);
if (h == NULL) {
return NGX_ERROR;
}
h->hash = 1;
ngx_str_set(&h->key, "Content-Encoding");
if (ctx->br) {
ngx_str_set(&h->value, "br");
} else {
ngx_str_set(&h->value, "brotli");
}
r->headers_out.content_encoding = h;
r->main_filter_need_in_memory = 1;
ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
ngx_http_weak_etag(r);
return ngx_http_next_header_filter(r);
}
static ngx_int_t
ngx_http_gzip_header_filter(ngx_http_request_t *r)
{
ngx_table_elt_t *h;
ngx_http_gzip_ctx_t *ctx;
ngx_http_gzip_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
if (!conf->enable
|| (r->headers_out.status != NGX_HTTP_OK
&& r->headers_out.status != NGX_HTTP_FORBIDDEN
&& r->headers_out.status != NGX_HTTP_NOT_FOUND)
|| (r->headers_out.content_encoding
&& r->headers_out.content_encoding->value.len)
|| (r->headers_out.content_length_n != -1
&& r->headers_out.content_length_n < conf->min_length)
|| ngx_http_test_content_type(r, &conf->types) == NULL
|| r->header_only)
{
return ngx_http_next_header_filter(r);
}
r->gzip_vary = 1;
#if (NGX_HTTP_DEGRADATION)
{
ngx_http_core_loc_conf_t *clcf;
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (clcf->gzip_disable_degradation && ngx_http_degraded(r))
{
return ngx_http_next_header_filter(r);
}
}
#endif
if (!r->gzip_tested)
{
if (ngx_http_gzip_ok(r) != NGX_OK)
{
return ngx_http_next_header_filter(r);
}
}
else if (!r->gzip_ok)
{
return ngx_http_next_header_filter(r);
}
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gzip_ctx_t));
if (ctx == NULL)
{
return NGX_ERROR;
}
ngx_http_set_ctx(r, ctx, ngx_http_gzip_filter_module);
ctx->request = r;
ctx->buffering = (conf->postpone_gzipping != 0);
ngx_http_gzip_filter_memory(r, ctx);
h = ngx_list_push(&r->headers_out.headers);
if (h == NULL)
{
return NGX_ERROR;
}
h->hash = 1;
ngx_str_set(&h->key, "Content-Encoding");
ngx_str_set(&h->value, "gzip");
r->headers_out.content_encoding = h;
r->main_filter_need_in_memory = 1;
ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
ngx_http_weak_etag(r);
return ngx_http_next_header_filter(r);
}
