static ngx_int_t
ngx_file_info_wrapper(ngx_str_t *name, ngx_open_file_info_t *of,
ngx_file_info_t *fi, ngx_log_t *log)
{
ngx_int_t rc;
#if !(NGX_HAVE_OPENAT)
rc = ngx_file_info(name->data, fi);
if (rc == NGX_FILE_ERROR) {
of->err = ngx_errno;
of->failed = ngx_file_info_n;
return NGX_FILE_ERROR;
}
return rc;
#else
ngx_fd_t fd;
if (of->disable_symlinks == NGX_DISABLE_SYMLINKS_OFF) {
rc = ngx_file_info(name->data, fi);
if (rc == NGX_FILE_ERROR) {
of->err = ngx_errno;
of->failed = ngx_file_info_n;
return NGX_FILE_ERROR;
}
return rc;
}
fd = ngx_open_file_wrapper(name, of, NGX_FILE_RDONLY|NGX_FILE_NONBLOCK,
NGX_FILE_OPEN, 0, log);
if (fd == NGX_INVALID_FILE) {
return NGX_FILE_ERROR;
}
rc = ngx_fd_info(fd, fi);
if (rc == NGX_FILE_ERROR) {
of->err = ngx_errno;
of->failed = ngx_fd_info_n;
}
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%V\" failed", name);
}
return rc;
#endif
}
static char *
ngx_http_pi_module_command(ngx_conf_t *cf,
ngx_command_t *cmd, void *conf)
{
ngx_int_t rc;
ngx_err_t err;
ngx_http_core_loc_conf_t *clcf;
ngx_http_pi_loc_conf_t *plcf;
ngx_str_t *value;
ngx_file_t file;
ngx_file_info_t fi;
plcf = conf;
value = cf->args->elts;
ngx_memzero(&file, sizeof(ngx_file_t));
file.name = value[1];
file.log = cf->log;
file.fd = ngx_open_file(file.name.data, NGX_FILE_RDONLY, 0, 0);
if (file.fd == NGX_INVALID_FILE) {
err = ngx_errno;
if (err != NGX_ENOENT) {
ngx_conf_log_error(NGX_LOG_CRIT, cf, err,
ngx_open_file_n " \"%s\" failed", file.name.data);
}
return NGX_CONF_ERROR;
}
if (ngx_fd_info(file.fd, &fi) == NGX_FILE_ERROR) {
ngx_conf_log_error(NGX_LOG_CRIT, cf, ngx_errno,
ngx_fd_info_n " \"%s\" failed", file.name.data);
rc = NGX_ERROR;
goto done;
}
plcf->size = (size_t) ngx_file_size(&fi);
plcf->buf = mmap(NULL, plcf->size, PROT_READ, MAP_SHARED, file.fd, 0);
rc = NGX_OK;
done:
if (ngx_close_file(file.fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " \"%s\" failed", file.name.data);
}
clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
clcf->handler = ngx_http_pi_handler;
return rc == NGX_OK ? NGX_CONF_OK : NGX_CONF_ERROR;
}
static int
ngx_squ_file_index(squ_State *l)
{
ngx_str_t key;
ngx_file_info_t fi;
ngx_http_request_t *r;
ngx_squ_file_ctx_t *ctx;
thr = ngx_squ_thread(l);
ngx_log_debug0(NGX_LOG_DEBUG_CORE, r->connection->log, 0, "squ file index");
key.data = (u_char *) squL_checklstring(l, -1, &key.len);
switch (key.len) {
case 4:
if (ngx_strncmp(key.data, "size", 4) == 0) {
ctx = ngx_squ_file(l);
ngx_memzero(&fi, sizeof(ngx_file_info_t));
if (ngx_fd_info(ctx->file.fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
ngx_fd_info_n " failed");
squ_pushnil(l);
squ_pushstring(l, ngx_fd_info_n " failed");
return 1;
}
squ_pushnumber(l, (squ_Number) ngx_file_size(&fi));
return 1;
}
break;
case 10:
if (ngx_strncmp(key.data, "attributes", 10) == 0) {
/* TODO */
}
break;
default:
break;
}
return 0;
}
static ngx_int_t
ngx_file_o_path_info(ngx_fd_t fd, ngx_file_info_t *fi, ngx_log_t *log)
{
static ngx_uint_t use_fstat = 1;
/*
* In Linux 2.6.39 the O_PATH flag was introduced that allows to obtain
* a descriptor without actually opening file or directory. It requires
* less permissions for path components, but till Linux 3.6 fstat() returns
* EBADF on such descriptors, and fstatat() with the AT_EMPTY_PATH flag
* should be used instead.
*
* Three scenarios are handled in this function:
*
* 1) The kernel is newer than 3.6 or fstat() with O_PATH support was
* backported by vendor. Then fstat() is used.
*
* 2) The kernel is newer than 2.6.39 but older than 3.6. In this case
* the first call of fstat() returns EBADF and we fallback to fstatat()
* with AT_EMPTY_PATH which was introduced at the same time as O_PATH.
*
* 3) The kernel is older than 2.6.39 but nginx was build with O_PATH
* support. Since descriptors are opened with O_PATH|O_RDONLY flags
* and O_PATH is ignored by the kernel then the O_RDONLY flag is
* actually used. In this case fstat() just works.
*/
if (use_fstat) {
if (ngx_fd_info(fd, fi) != NGX_FILE_ERROR) {
return NGX_OK;
}
if (ngx_errno != NGX_EBADF) {
return NGX_ERROR;
}
ngx_log_error(NGX_LOG_NOTICE, log, 0,
"fstat(O_PATH) failed with EBADF, "
"switching to fstatat(AT_EMPTY_PATH)");
use_fstat = 0;
}
if (ngx_file_at_info(fd, "", fi, AT_EMPTY_PATH) != NGX_FILE_ERROR) {
return NGX_OK;
}
return NGX_ERROR;
}
ngx_int_t ngx_http_small_light_imlib2_process(ngx_http_request_t *r, ngx_http_small_light_ctx_t *ctx)
{
ngx_http_small_light_imlib2_ctx_t *ictx;
ngx_http_small_light_image_size_t sz;
Imlib_Image image_org, image_dst, image_tmp;
Imlib_Load_Error err;
ngx_file_info_t fi;
ngx_fd_t fd;
char *filename, *sharpen, *blur, *of, *buf;
void *data;
int w, h, radius, orientation;
double iw, ih, q;
ngx_int_t type;
const char *ext;
ssize_t size;
ictx = (ngx_http_small_light_imlib2_ctx_t *)ctx->ictx;
filename = (char *)ictx->tf->file.name.data;
/* adjust image size */
ngx_http_small_light_calc_image_size(r, ctx, &sz, 10000.0, 10000.0);
if (sz.jpeghint_flg != 0) {
if (ngx_http_small_light_load_jpeg((void**)&data, &w, &h, r, filename, sz.dw, sz.dh) != NGX_OK) {
image_org = imlib_load_image_immediately_without_cache(filename);
if (image_org == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"failed to load image %s:%d",
__FUNCTION__,
__LINE__);
return NGX_ERROR;
}
} else {
image_org = imlib_create_image_using_data(w, h, data);
}
} else {
image_org = imlib_load_image_immediately_without_cache(filename);
if (image_org == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"failed to load image %s:%d",
__FUNCTION__,
__LINE__);
return NGX_ERROR;
}
}
/* rotate. */
if (sz.angle) {
orientation = 0;
switch (sz.angle) {
case 90:
orientation = 1;
break;
case 180:
orientation = 2;
break;
case 270:
orientation = 3;
break;
default:
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"image not rotated. 'angle'(%d) must be 90 or 180 or 270. %s:%d",
sz.angle,
__FUNCTION__,
__LINE__);
break;
}
imlib_context_set_image(image_org);
imlib_image_orientate(orientation);
}
/* calc size. */
imlib_context_set_image(image_org);
iw = (double)imlib_image_get_width();
ih = (double)imlib_image_get_height();
ngx_http_small_light_calc_image_size(r, ctx, &sz, iw, ih);
/* pass through. */
if (sz.pt_flg != 0) {
ctx->of = ctx->inf;
return NGX_OK;
}
/* crop, scale. */
if (sz.scale_flg != 0) {
image_dst = imlib_create_cropped_scaled_image((int)sz.sx, (int)sz.sy, (int)sz.sw, (int)sz.sh, (int)sz.dw, (int)sz.dh);
imlib_context_set_image(image_org);
imlib_free_image();
} else {
image_dst = image_org;
}
if (image_dst == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"imlib_create_cropped_scaled_image failed. %s:%d",
__FUNCTION__,
__LINE__);
return NGX_ERROR;
}
/* create canvas then draw image to the canvas. */
if (sz.cw > 0.0 && sz.ch > 0.0) {
image_tmp = imlib_create_image(sz.cw, sz.ch);
if (image_tmp == NULL) {
imlib_context_set_image(image_dst);
imlib_free_image();
return NGX_ERROR;
}
imlib_context_set_image(image_tmp);
imlib_context_set_color(sz.cc.r, sz.cc.g, sz.cc.b, sz.cc.a);
imlib_image_fill_rectangle(0, 0, sz.cw, sz.ch);
imlib_blend_image_onto_image(image_dst, 255, 0, 0,
(int)sz.dw, (int)sz.dh, (int)sz.dx, (int)sz.dy, (int)sz.dw, (int)sz.dh);
imlib_context_set_image(image_dst);
imlib_free_image();
image_dst = image_tmp;
}
/* effects. */
sharpen = NGX_HTTP_SMALL_LIGHT_PARAM_GET_LIT(&ctx->hash, "sharpen");
if (sharpen) {
radius = ngx_http_small_light_parse_int(sharpen);
if (radius > 0) {
imlib_context_set_image(image_dst);
imlib_image_sharpen(radius);
}
}
blur = NGX_HTTP_SMALL_LIGHT_PARAM_GET_LIT(&ctx->hash, "blur");
if (blur) {
radius = ngx_http_small_light_parse_int(blur);
if (radius > 0) {
imlib_context_set_image(image_dst);
imlib_image_blur(radius);
}
}
/* border. */
if (sz.bw > 0.0 || sz.bh > 0.0) {
imlib_context_set_color(sz.bc.r, sz.bc.g, sz.bc.b, sz.bc.a);
imlib_context_set_image(image_dst);
if (sz.cw > 0.0 && sz.ch > 0.0) {
imlib_image_fill_rectangle(0, 0, sz.cw, sz.bh);
imlib_image_fill_rectangle(0, 0, sz.bw, sz.ch);
imlib_image_fill_rectangle(0, sz.ch - sz.bh, sz.cw, sz.bh);
imlib_image_fill_rectangle(sz.cw - sz.bw, 0, sz.bw, sz.ch);
} else {
imlib_image_fill_rectangle(0, 0, sz.dw, sz.bh);
imlib_image_fill_rectangle(0, 0, sz.bw, sz.ch);
imlib_image_fill_rectangle(0, sz.dh - sz.bh, sz.dw, sz.bh);
imlib_image_fill_rectangle(sz.dw - sz.bw, 0, sz.bw, sz.dh);
}
}
/* set params. */
imlib_context_set_image(image_dst);
q = ngx_http_small_light_parse_double(NGX_HTTP_SMALL_LIGHT_PARAM_GET_LIT(&ctx->hash, "q"));
if (q > 0.0) {
imlib_image_attach_data_value("quality", NULL, q, NULL);
}
of = NGX_HTTP_SMALL_LIGHT_PARAM_GET_LIT(&ctx->hash, "of");
if (ngx_strlen(of) > 0) {
type = ngx_http_small_light_type(of);
if (type == NGX_HTTP_SMALL_LIGHT_IMAGE_NONE) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"of is invalid(%s) %s:%d",
of,
__FUNCTION__,
__LINE__);
of = (char *)ngx_http_small_light_image_exts[ictx->type - 1];
} else if (type == NGX_HTTP_SMALL_LIGHT_IMAGE_WEBP) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"WebP is not supported %s:%d",
__FUNCTION__,
__LINE__);
of = (char *)ngx_http_small_light_image_exts[ictx->type - 1];
} else {
ictx->type = type;
}
imlib_image_set_format(of);
ctx->of = ngx_http_small_light_image_types[ictx->type - 1];
} else {
ext = ngx_http_small_light_image_exts[ictx->type - 1];
imlib_image_set_format(ext);
ctx->of = ctx->inf;
}
/* save image. */
imlib_save_image_with_error_return(filename, &err);
imlib_free_image();
/* check error. */
if (err != IMLIB_LOAD_ERROR_NONE) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"failed to imlib_save_error %s:%d",
__FUNCTION__,
__LINE__);
return NGX_ERROR;
}
if (ngx_file_info(filename, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"failed to ngx_file_info %s:%d",
__FUNCTION__,
__LINE__);
return NGX_ERROR;
}
fd = ngx_open_file(filename, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"failed to open fd %s:%d",
__FUNCTION__,
__LINE__);
return NGX_ERROR;
}
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"failed to ngx_fd_info %s:%d",
__FUNCTION__,
__LINE__);
ngx_close_file(fd);
return NGX_ERROR;
}
buf = ngx_palloc(r->pool, ngx_file_size(&fi));
if (buf == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"failed to allocate memory from r->pool %s:%d",
__FUNCTION__,
__LINE__);
ngx_close_file(fd);
return NGX_ERROR;
}
size = ngx_read_fd(fd, buf, ngx_file_size(&fi));
if (size == -1) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"failed to ngx_read_fd %s:%d",
__FUNCTION__,
__LINE__);
ngx_close_file(fd);
return NGX_ERROR;
}
if ((size_t)size > ctx->content_length) {
ctx->content = ngx_palloc(r->pool, size);
if (ctx->content == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"failed to allocate memory from r->pool %s:%d",
__FUNCTION__,
__LINE__);
ngx_close_file(fd);
return NGX_ERROR;
}
}
ngx_memcpy(ctx->content, buf, size);
ngx_close_file(fd);
ctx->content_length = size;
return NGX_OK;
}
//解析filename中的配置项
char *
ngx_conf_parse(ngx_conf_t *cf, ngx_str_t *filename)
{
char *rv;
ngx_fd_t fd;
ngx_int_t rc;
ngx_buf_t buf;
ngx_conf_file_t *prev, conf_file;
enum {
parse_file = 0,
parse_block,
parse_param
} type;
#if (NGX_SUPPRESS_WARN)
fd = NGX_INVALID_FILE;
prev = NULL;
#endif
if (filename) {
/* open configuration file */
//首先打开配置文件
fd = ngx_open_file(filename->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_open_file_n " \"%s\" failed",
filename->data);
return NGX_CONF_ERROR;
}
//令cf->conf_file指向临时的conf_file结构体
prev = cf->conf_file;
cf->conf_file = &conf_file;
//获取配置文件的inode信息
if (ngx_fd_info(fd, &cf->conf_file->file.info) == -1) {
ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", filename->data);
}
//我们将文件读取到cf->conf_file->buffer中
cf->conf_file->buffer = &buf;
buf.start = ngx_alloc(NGX_CONF_BUFFER, cf->log);
if (buf.start == NULL) {
goto failed;
}
buf.pos = buf.start;
buf.last = buf.start;
buf.end = buf.last + NGX_CONF_BUFFER;
buf.temporary = 1; //这是一个临时buf
cf->conf_file->file.fd = fd;
cf->conf_file->file.name.len = filename->len;
cf->conf_file->file.name.data = filename->data;
cf->conf_file->file.offset = 0;
cf->conf_file->file.log = cf->log;
cf->conf_file->line = 1;
type = parse_file;
} else if (cf->conf_file->file.fd != NGX_INVALID_FILE) {
type = parse_block;
} else {
type = parse_param;
}
//使用状态机方式解析配置项
for ( ;; ) {
//读取配置文件并解析, 每次返回NGX_OK，说明已经解析到一条配置项,
//我们会调用响应的回调函数进行处理
rc = ngx_conf_read_token(cf);
/*
* ngx_conf_read_token() may return
*
* NGX_ERROR there is error
* NGX_OK the token terminated by ";" was found
* NGX_CONF_BLOCK_START the token terminated by "{" was found
* NGX_CONF_BLOCK_DONE the "}" was found
* NGX_CONF_FILE_DONE the configuration file is done
*/
if (rc == NGX_ERROR) {
goto done;
}
if (rc == NGX_CONF_BLOCK_DONE) {
if (type != parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_FILE_DONE) {
if (type == parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"unexpected end of file, expecting \"}\"");
goto failed;
}
goto done;
}
//如果碰到当前配置块的开始，则我们继续，否则返回失败
if (rc == NGX_CONF_BLOCK_START) {
if (type == parse_param) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"block directives are not supported "
"in -g option");
goto failed;
}
}
/* rc == NGX_OK || rc == NGX_CONF_BLOCK_START */
//在解析到配置项以后，如果自定义了handler函数则调用handler函数,
//否则调用默认的set方法设置参数
if (cf->handler) {
/*
* the custom handler, i.e., that is used in the http's
* "types { ... }" directive
*/
rv = (*cf->handler)(cf, NULL, cf->handler_conf);
if (rv == NGX_CONF_OK) {
continue;
}
if (rv == NGX_CONF_ERROR) {
goto failed;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, rv);
goto failed;
}
//调用cf->set方法设置配置项,一次只能设置一个配置项,当出现子模块时
//set方法会递归解析子模块,并进行配置
rc = ngx_conf_handler(cf, rc);
if (rc == NGX_ERROR) {
goto failed;
}
}
failed:
rc = NGX_ERROR;
done:
if (filename) {
if (cf->conf_file->buffer->start) {
ngx_free(cf->conf_file->buffer->start);
}
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " %s failed",
filename->data);
return NGX_CONF_ERROR;
}
cf->conf_file = prev;
}
if (rc == NGX_ERROR) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
void
ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf)
{
off_t fs_size;
ngx_int_t rc;
ngx_file_uniq_t uniq;
ngx_file_info_t fi;
ngx_http_cache_t *c;
ngx_ext_rename_file_t ext;
ngx_http_file_cache_t *cache;
c = r->cache;
if (c->updated) {
return;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http file cache update");
c->updated = 1; // ???
c->updating = 0;
cache = c->file_cache;
uniq = 0;
fs_size = 0;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http file cache rename: \"%s\" to \"%s\"",
tf->file.name.data, c->file.name.data);
ext.access = NGX_FILE_OWNER_ACCESS;
ext.path_access = NGX_FILE_OWNER_ACCESS;
ext.time = -1; // 不更改文件的修改时间
ext.create_path = 1; // 如果目录不存在将创建目录
ext.delete_file = 1;
ext.log = r->connection->log;
// 改变临时文件的名字（c->file.name 在哪里设置的？？？）
rc = ngx_ext_rename_file(&tf->file.name, &c->file.name, &ext);
if (rc == NGX_OK) {
// 获取文件信息
if (ngx_fd_info(tf->file.fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", tf->file.name.data);
rc = NGX_ERROR;
} else {
uniq = ngx_file_uniq(&fi); // 文件结点号
fs_size = (ngx_file_fs_size(&fi) + cache->bsize - 1) / cache->bsize;
}
}
ngx_shmtx_lock(&cache->shpool->mutex);
c->node->count--;
c->node->uniq = uniq;
c->node->body_start = c->body_start;
cache->sh->size += fs_size - c->node->fs_size;
c->node->fs_size = fs_size;
if (rc == NGX_OK) {
c->node->exists = 1;
}
c->node->updating = 0;
ngx_shmtx_unlock(&cache->shpool->mutex);
}
char *
ngx_conf_parse(ngx_conf_t *cf, ngx_str_t *filename)
{
char *rv;
ngx_fd_t fd;
ngx_int_t rc;
ngx_buf_t *b;
ngx_uint_t block;
ngx_conf_file_t *prev;
#if (NGX_SUPPRESS_WARN)
fd = NGX_INVALID_FILE;
prev = NULL;
#endif
if (filename) {
/* open configuration file */
fd = ngx_open_file(filename->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_open_file_n " \"%s\" failed",
filename->data);
return NGX_CONF_ERROR;
}
prev = cf->conf_file;
cf->conf_file = ngx_palloc(cf->pool, sizeof(ngx_conf_file_t));
if (cf->conf_file == NULL) {
return NGX_CONF_ERROR;
}
if (ngx_fd_info(fd, &cf->conf_file->file.info) == -1) {
ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", filename->data);
}
b = ngx_calloc_buf(cf->pool);
if (b == NULL) {
return NGX_CONF_ERROR;
}
cf->conf_file->buffer = b;
b->start = ngx_alloc(ngx_pagesize, cf->log);
if (b->start == NULL) {
return NGX_CONF_ERROR;
}
b->pos = b->start;
b->last = b->start;
b->end = b->last + ngx_pagesize;
b->temporary = 1;
cf->conf_file->file.fd = fd;
cf->conf_file->file.name.len = filename->len;
cf->conf_file->file.name.data = filename->data;
cf->conf_file->file.offset = 0;
cf->conf_file->file.log = cf->log;
cf->conf_file->line = 1;
block = 0;
} else {
block = 1;
}
for ( ;; ) {
rc = ngx_conf_read_token(cf);
/*
* ngx_conf_read_token() may return
*
* NGX_ERROR there is error
* NGX_OK the token terminated by ";" was found
* NGX_CONF_BLOCK_START the token terminated by "{" was found
* NGX_CONF_BLOCK_DONE the "}" was found
* NGX_CONF_FILE_DONE the configuration file is done
*/
if (rc == NGX_ERROR) {
goto done;
}
if (rc == NGX_CONF_BLOCK_DONE) {
if (!block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"}\"");
goto failed;
}
block = 0;
}
if (rc == NGX_CONF_FILE_DONE && block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"unexpected end of file, expecting \"}\"");
goto failed;
}
if (rc != NGX_OK && rc != NGX_CONF_BLOCK_START) {
goto done;
}
if (cf->handler) {
/*
* the custom handler, i.e., that is used in the http's
* "types { ... }" directive
*/
rv = (*cf->handler)(cf, NULL, cf->handler_conf);
if (rv == NGX_CONF_OK) {
continue;
}
if (rv == NGX_CONF_ERROR) {
goto failed;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, rv);
goto failed;
}
rc = ngx_conf_handler(cf, rc);
if (rc == NGX_ERROR) {
goto failed;
}
}
failed:
rc = NGX_ERROR;
done:
if (filename) {
ngx_free(cf->conf_file->buffer->start);
cf->conf_file = prev;
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " %s failed",
cf->conf_file->file.name.data);
return NGX_CONF_ERROR;
}
}
if (rc == NGX_ERROR) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
//这个函数的详细解析
//请参看:http://www.pagefault.info/?p=188 nginx的启动流程分析(一)
// http://www.pagefault.info/?p=368
//第二个参数可以为空的，如果为空，则说明将要解析的是block中的内容或者param
char *
ngx_conf_parse(ngx_conf_t *cf, ngx_str_t *filename)
{
char *rv;
ngx_fd_t fd;
ngx_int_t rc;
ngx_buf_t buf;
ngx_conf_file_t *prev, conf_file;
enum {
parse_file = 0,
parse_block,
parse_param
} type;
// 经过这个宏
#if (NGX_SUPPRESS_WARN)
fd = NGX_INVALID_FILE;
prev = NULL;
#endif
if (filename) {
/* open configuration file */
// 打开配置文件
fd = ngx_open_file(filename->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
// NGX_INVALID_FILE 为宏定义，值为－1 ，定义在/os/unix/ngx_files.h 中
if (fd == NGX_INVALID_FILE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_open_file_n " \"%s\" failed",
filename->data);
return NGX_CONF_ERROR;
}
prev = cf->conf_file;
cf->conf_file = &conf_file;
// 获取配置文件的stat信息,并存储到cf->conf_file->file.info这个stat结构体中
// ngx_fd_info 这个函数是fstat这个函数的宏包装。参考./os/unix/ngx_files.h
if (ngx_fd_info(fd, &cf->conf_file->file.info) == -1) {
ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", filename->data);
}
cf->conf_file->buffer = &buf;
// 申请一个NGX_CONF_BUFFER大小的buffer，用于 ngx_conf_read_token() 函数解析配置文件
buf.start = ngx_alloc(NGX_CONF_BUFFER, cf->log);
if (buf.start == NULL) {
goto failed;
}
buf.pos = buf.start;
buf.last = buf.start;
buf.end = buf.last + NGX_CONF_BUFFER;
buf.temporary = 1;
// 保存配置文件的基本信息
cf->conf_file->file.fd = fd;
cf->conf_file->file.name.len = filename->len;
cf->conf_file->file.name.data = filename->data;
cf->conf_file->file.offset = 0;
cf->conf_file->file.log = cf->log;
cf->conf_file->line = 1;
type = parse_file;
} else if (cf->conf_file->file.fd != NGX_INVALID_FILE) {
type = parse_block;
} else {
type = parse_param;
}
//循环遍历每一行配置文件，读取配置内容
for ( ;; ) {
//读入一个token，一般是一行
//读到的配置参数放到: (ngx_str_t*)(*((*cf).args)).elts
rc = ngx_conf_read_token(cf);
/*
* ngx_conf_read_token() may return
*
* NGX_ERROR there is error
* NGX_OK the token terminated by ";" was found
* NGX_CONF_BLOCK_START the token terminated by "{" was found
* NGX_CONF_BLOCK_DONE the "}" was found
* NGX_CONF_FILE_DONE the configuration file is done
*/
if (rc == NGX_ERROR) {
goto done;
}
if (rc == NGX_CONF_BLOCK_DONE) {
if (type != parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_FILE_DONE) {
if (type == parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"unexpected end of file, expecting \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_BLOCK_START) {
if (type == parse_param) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"block directives are not supported "
"in -g option");
goto failed;
}
}
/* rc == NGX_OK || rc == NGX_CONF_BLOCK_START */
//判断cf是否有handler回调，如果有的话，优先调用handler回调，如果没有，则会进入ngx_conf_handler进行一般处理
//特别说一下，http的模块使用handler是ngx_http_block，具体请看ngx_http.c
if (cf->handler) {
/*
* the custom handler, i.e., that is used in the http's
* "types { ... }" directive
*/
//使用handler处理
rv = (*cf->handler)(cf, NULL, cf->handler_conf);
if (rv == NGX_CONF_OK) {
continue;
}
if (rv == NGX_CONF_ERROR) {
goto failed;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, rv);
goto failed;
}
//否则进入一般处理， 调用ngx_conf_handler对当前的token进行处理
// 参数中的rc 为ngx_read_conf_token的返回值
rc = ngx_conf_handler(cf, rc);
if (rc == NGX_ERROR) {
goto failed;
}
} //end for
failed:
rc = NGX_ERROR;
done:
//恢复现存、关闭已经打开的文件
//NGX_CONF_FILE_DONE 时必须要处理的部分
if (filename) {
if (cf->conf_file->buffer->start) {
ngx_free(cf->conf_file->buffer->start);
}
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " %s failed",
filename->data);
return NGX_CONF_ERROR;
}
cf->conf_file = prev;
}
// NGX_ERROR NGX_CONF_FILE_DONE NGX_CONF_BLOCK_DONE 时都需要处理的部分
if (rc == NGX_ERROR) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static ngx_int_t ngx_http_static_handler(ngx_http_request_t *r)
{
u_char *last;
ngx_fd_t fd;
ngx_int_t rc;
ngx_uint_t level;
ngx_str_t name, location;
ngx_err_t err;
ngx_log_t *log;
ngx_buf_t *b;
ngx_chain_t out;
ngx_file_info_t fi;
ngx_http_cleanup_t *file_cleanup, *redirect_cleanup;
ngx_http_log_ctx_t *ctx;
ngx_http_core_loc_conf_t *clcf;
ngx_http_static_loc_conf_t *slcf;
#if (NGX_HTTP_CACHE)
uint32_t file_crc, redirect_crc;
ngx_http_cache_t *file, *redirect;
#endif
if (r->uri.data[r->uri.len - 1] == '/') {
return NGX_DECLINED;
}
if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
return NGX_HTTP_NOT_ALLOWED;
}
rc = ngx_http_discard_body(r);
if (rc != NGX_OK && rc != NGX_AGAIN) {
return rc;
}
#if (NGX_HTTP_CACHE)
/*
* there is a valid cached open file, i.e by the index handler,
* and it should be already registered in r->cleanup
*/
if (r->cache && !r->cache->expired) {
return ngx_http_send_cached(r);
}
#endif
log = r->connection->log;
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
/*
* make a file name, reserve 2 bytes for a trailing '/'
* in a possible redirect and for the last '\0'
*/
if (clcf->alias) {
name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2
- clcf->name.len);
if (name.data == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
last = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
last = ngx_cpystrn(last, r->uri.data + clcf->name.len,
r->uri.len + 1 - clcf->name.len);
name.len = last - name.data;
location.data = ngx_palloc(r->pool, r->uri.len + 2);
if (location.data == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
#if 0
/*
* aliases usually have trailling "/",
* set it in the start of the possible redirect
*/
if (*location.data != '/') {
location.data--;
}
#endif
location.len = last - location.data + 1;
} else {
name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2);
if (name.data == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
location.data = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
name.len = last - name.data;
location.len = last - location.data + 1;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
"http filename: \"%s\"", name.data);
/* allocate cleanups */
if (!(file_cleanup = ngx_push_array(&r->cleanup))) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
file_cleanup->valid = 0;
slcf = ngx_http_get_module_loc_conf(r, ngx_http_static_module);
if (slcf->redirect_cache) {
if (!(redirect_cleanup = ngx_push_array(&r->cleanup))) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
redirect_cleanup->valid = 0;
} else {
redirect_cleanup = NULL;
}
#if (NGX_HTTP_CACHE)
/* look up an open files cache */
if (clcf->open_files) {
file = ngx_http_cache_get(clcf->open_files, file_cleanup,
&name, &file_crc);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
"http open file cache get: " PTR_FMT, file);
if (file && !file->expired) {
r->cache = file;
return ngx_http_send_cached(r);
}
} else {
file = NULL;
}
/* look up an redirect cache */
if (slcf->redirect_cache) {
redirect = ngx_http_cache_get(slcf->redirect_cache, redirect_cleanup,
&name, &redirect_crc);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
"http redirect cache get: " PTR_FMT, redirect);
if (redirect && !redirect->expired) {
/*
* We do not copy a cached value so the cache entry is locked
* until the end of the request. In a single threaded model
* the redirected request should complete before other event
* will be processed. In a multithreaded model this locking
* should keep more popular redirects in cache.
*/
if (!(r->headers_out.location =
ngx_http_add_header(&r->headers_out, ngx_http_headers_out)))
{
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->headers_out.location->value = redirect->data.value;
return NGX_HTTP_MOVED_PERMANENTLY;
}
} else {
redirect = NULL;
}
#endif
/* open file */
#if (WIN9X)
/* TODO: redirect cache */
if (ngx_win32_version < NGX_WIN_NT) {
/*
* there is no way to open a file or a directory in Win9X with
* one syscall because Win9X has no FILE_FLAG_BACKUP_SEMANTICS flag
* so we need to check its type before the opening
*/
if (ngx_file_info(name.data, &fi) == NGX_FILE_ERROR) {
err = ngx_errno;
ngx_log_error(NGX_LOG_ERR, log, err,
ngx_file_info_n " \"%s\" failed", name.data);
if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
return NGX_HTTP_NOT_FOUND;
} else if (err == NGX_EACCES) {
return NGX_HTTP_FORBIDDEN;
} else {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
}
if (ngx_is_dir(&fi)) {
ngx_log_debug(log, "HTTP DIR: '%s'" _ name.data);
if (!(r->headers_out.location =
ngx_http_add_header(&r->headers_out, ngx_http_headers_out)))
{
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
*last++ = '/';
*last = '\0';
r->headers_out.location->value.len = last - location;
r->headers_out.location->value.data = location;
return NGX_HTTP_MOVED_PERMANENTLY;
}
}
#endif
fd = ngx_open_file(name.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
if (fd == NGX_INVALID_FILE) {
err = ngx_errno;
if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
level = NGX_LOG_ERR;
rc = NGX_HTTP_NOT_FOUND;
} else if (err == NGX_EACCES) {
level = NGX_LOG_ERR;
rc = NGX_HTTP_FORBIDDEN;
} else {
level = NGX_LOG_CRIT;
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_log_error(level, log, err,
ngx_open_file_n " \"%s\" failed", name.data);
return rc;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", fd);
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", name.data);
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%s\" failed", name.data);
}
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (ngx_is_dir(&fi)) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%s\" failed", name.data);
}
*last++ = '/';
*last = '\0';
r->headers_out.location = ngx_list_push(&r->headers_out.headers);
if (r->headers_out.location == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->headers_out.location->value = location;
#if (NGX_HTTP_CACHE)
if (slcf->redirect_cache) {
if (redirect) {
if (location.len == redirect->data.value.len
&& ngx_memcmp(redirect->data.value.data, location.data,
location.len) == 0)
{
redirect->accessed = ngx_cached_time;
redirect->updated = ngx_cached_time;
/*
* we can unlock the cache entry because
* we have the local copy anyway
*/
ngx_http_cache_unlock(slcf->redirect_cache, redirect, log);
redirect_cleanup->valid = 0;
return NGX_HTTP_MOVED_PERMANENTLY;
}
}
location.len++;
redirect = ngx_http_cache_alloc(slcf->redirect_cache, redirect,
redirect_cleanup,
&name, redirect_crc,
&location, log);
location.len--;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
"http redirect cache alloc: " PTR_FMT, redirect);
if (redirect) {
redirect->fd = NGX_INVALID_FILE;
redirect->accessed = ngx_cached_time;
redirect->last_modified = 0;
redirect->updated = ngx_cached_time;
redirect->memory = 1;
ngx_http_cache_unlock(slcf->redirect_cache, redirect, log);
redirect_cleanup->valid = 0;
}
}
#endif
return NGX_HTTP_MOVED_PERMANENTLY;
}
#if !(WIN32) /* the not regular files are probably Unix specific */
if (!ngx_is_file(&fi)) {
ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
"%s is not a regular file", name.data);
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%s\" failed", name.data);
}
return NGX_HTTP_NOT_FOUND;
}
#endif
#if (NGX_HTTP_CACHE)
if (clcf->open_files) {
#if (NGX_USE_HTTP_FILE_CACHE_UNIQ)
if (file && file->uniq == ngx_file_uniq(&fi)) {
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%s\" failed", name.data);
}
file->accessed = ngx_cached_time;
file->updated = ngx_cached_time;
file->expired = 0;
r->cache = file;
return ngx_http_send_cached(r);
} else {
if (file) {
ngx_http_cache_unlock(clcf->open_files, file, log);
file = NULL;
}
file = ngx_http_cache_alloc(clcf->open_files, file,
file_cleanup,
&name, file_crc, NULL, log);
if (file) {
file->uniq = ngx_file_uniq(&fi);
}
}
#else
file = ngx_http_cache_alloc(clcf->open_files, file,
file_cleanup,
&name, file_crc, NULL, log);
#endif
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
"http open file cache alloc: " PTR_FMT, file);
if (file) {
file->fd = fd;
file->data.size = ngx_file_size(&fi);
file->accessed = ngx_cached_time;
file->last_modified = ngx_file_mtime(&fi);
file->updated = ngx_cached_time;
r->cache = file;
}
return ngx_http_send_cached(r);
}
#endif
ctx = log->data;
ctx->action = "sending response to client";
file_cleanup->data.file.fd = fd;
file_cleanup->data.file.name = name.data;
file_cleanup->valid = 1;
file_cleanup->cache = 0;
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = ngx_file_size(&fi);
r->headers_out.last_modified_time = ngx_file_mtime(&fi);
if (r->headers_out.content_length_n == 0) {
r->header_only = 1;
}
if (ngx_http_set_content_type(r) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
#if (NGX_SUPPRESS_WARN)
b = NULL;
#endif
if (!r->header_only) {
/* we need to allocate all before the header would be sent */
if (!(b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)))) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (!(b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t)))) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->filter_allow_ranges = 1;
}
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc;
}
b->in_file = 1;
if (!r->main) {
b->last_buf = 1;
}
b->file_pos = 0;
b->file_last = ngx_file_size(&fi);
b->file->fd = fd;
b->file->log = log;
out.buf = b;
out.next = NULL;
return ngx_http_output_filter(r, &out);
}
static int
ngx_squ_file_write(squ_State *l)
{
char *errstr;
size_t size;
u_char *str;
ngx_int_t rc;
ngx_buf_t *b;
ngx_file_t *file;
ngx_file_info_t fi;
ngx_squ_thread_t *thr;
ngx_squ_file_ctx_t *ctx;
thr = ngx_squ_thread(l);
ngx_log_debug0(NGX_LOG_DEBUG_CORE, thr->log, 0, "squ file write");
ctx = ngx_squ_file(l);
file = &ctx->file;
if (file->fd == NGX_INVALID_FILE) {
errstr = "invalid fd";
goto error;
}
ngx_memzero(&fi, sizeof(ngx_file_info_t));
if (ngx_fd_info(file->fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, thr->log, ngx_errno,
ngx_fd_info_n " \"%V\" failed", &file->name);
errstr = ngx_fd_info_n " failed";
goto error;
}
size = (size_t) ngx_file_size(&fi);
str = (u_char *) squL_checklstring(l, 2, &ctx->size);
ctx->offset = squL_optint(l, 3, (squ_Integer) ctx->offset);
if (ctx->offset < 0 || ctx->offset > size) {
errstr = "invalid offset of the file";
goto error;
}
b = ctx->out;
if (b == NULL || (size_t) (b->end - b->start) < ctx->size) {
if (b != NULL && (size_t) (b->end - b->start) > ctx->pool->max) {
ngx_pfree(ctx->pool, b->start);
}
size = ngx_max(ngx_pagesize, ctx->size);
b = ngx_create_temp_buf(ctx->pool, size);
if (b == NULL) {
errstr = "ngx_create_temp_buf() failed";
goto error;
}
ctx->out = b;
}
ngx_memcpy(b->start, str, ctx->size);
rc = ngx_squ_file_aio_write(thr, ctx);
if (rc == NGX_AGAIN) {
return squ_yield(l, 0);
}
return rc;
error:
squ_pushboolean(l, 0);
squ_pushstring(l, errstr);
return 2;
}
static ngx_fd_t
ngx_openat_file_owner(ngx_fd_t at_fd, const u_char *name,
ngx_int_t mode, ngx_int_t create, ngx_int_t access, ngx_log_t *log)
{
ngx_fd_t fd;
ngx_err_t err;
ngx_file_info_t fi, atfi;
/*
* To allow symlinks with the same owner, use openat() (followed
* by fstat()) and fstatat(AT_SYMLINK_NOFOLLOW), and then compare
* uids between fstat() and fstatat().
*
* As there is a race between openat() and fstatat() we don't
* know if openat() in fact opened symlink or not. Therefore,
* we have to compare uids even if fstatat() reports the opened
* component isn't a symlink (as we don't know whether it was
* symlink during openat() or not).
*/
fd = ngx_openat_file(at_fd, name, mode, create, access);
if (fd == NGX_INVALID_FILE) {
return NGX_INVALID_FILE;
}
if (ngx_file_at_info(at_fd, name, &atfi, AT_SYMLINK_NOFOLLOW)
== NGX_FILE_ERROR)
{
err = ngx_errno;
goto failed;
}
#if (NGX_HAVE_O_PATH)
if (ngx_file_o_path_info(fd, &fi, log) == NGX_ERROR) {
err = ngx_errno;
goto failed;
}
#else
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
err = ngx_errno;
goto failed;
}
#endif
if (fi.st_uid != atfi.st_uid) {
err = NGX_ELOOP;
goto failed;
}
return fd;
failed:
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%V\" failed", name);
}
ngx_set_errno(err);
return NGX_INVALID_FILE;
}
static int
command_sendfile(ClientData clientData, Tcl_Interp *interp, int objc,
Tcl_Obj *const objv[])
{
ngx_buf_t *b;
ngx_chain_t out;
ngx_http_request_t *r = getrequest(clientData);
ngx_file_info_t *fi;
ngx_fd_t fd;
const char *filename;
int filename_len;
int rc;
if (objc != 2) {
Tcl_WrongNumArgs(interp, 1, objv, "file");
return TCL_ERROR;
}
filename = Tcl_GetStringFromObj(objv[1], &filename_len);
fd = ngx_open_file(filename, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
Tcl_SetResult(interp, (char *) Tcl_PosixError(interp),
TCL_VOLATILE);
return TCL_ERROR;
}
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
return TCL_ERROR;
}
b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
if (b->file == NULL) {
return TCL_ERROR;
}
fi = &b->file->info;
ngx_fd_info(fd, fi);
if (!r->header_sent) {
r->headers_out.content_length_n = ngx_file_size(fi);
r->headers_out.last_modified_time = ngx_file_mtime(fi);
if (ngx_http_set_etag(r) != NGX_OK) {
return TCL_ERROR;
}
ngx_http_send_header(r);
/* TODO: CHECK RETURN */
}
r->allow_ranges = 1;
b->file_pos = 0;
b->file_last = ngx_file_size(fi);
b->in_file = 1;
b->last_buf = 1;
b->last_in_chain = 1;
b->file->fd = fd;
b->file->name.data = (u_char*)filename;
b->file->name.len = filename_len;
b->file->log = r->connection->log;
out.buf = b;
out.next = NULL;
rc = ngx_http_output_filter(r, &out);
if (rc != NGX_OK) {
ngx_tcl_set_error_code(interp, rc);
return TCL_ERROR;
}
printf("ngx_http_output_filter returns %i\n", rc); fflush(stdout);
return TCL_OK;
}
ngx_int_t ngx_http_cookie_conf_each_line_proc(ngx_http_cookie_clean_conf_t *conf,
ngx_str_t *filename,
each_line_proc proc,
void * obj,
void * p_data)
{
ngx_int_t rc = NGX_OK;
ngx_file_t file;
ngx_str_t full;
ngx_fd_t fd;
off_t file_size;
ssize_t n;
ngx_buf_t buf;
u_char *s = NULL;
ngx_log_t *log = conf->ctx->log;
ngx_memzero(&file, sizeof(ngx_file_t));
ngx_memzero(&full, sizeof(ngx_str_t));
ngx_memzero(&buf, sizeof(ngx_buf_t));
fd = NGX_INVALID_FILE;
if (filename->len == 0) {
ngx_log_debug(NGX_LOG_NOTICE, log, 0, "[%s:%d], file not set", __FUNCTION__, __LINE__);
return NGX_ERROR;
}
if (ngx_http_cookie_full_name(conf->ctx, filename, &full) != NGX_OK) {
ngx_log_debug(NGX_LOG_NOTICE, log, 0, "[%s:%d], get full file name of \"%V\" failed.",__FUNCTION__, __LINE__, filename);
goto failed;
}
ngx_log_debug(NGX_LOG_NOTICE, log, 0, "[%s:%d], full file name:\"%V\".", __FUNCTION__, __LINE__, &full);
fd = ngx_open_file(full.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_log_debug(NGX_LOG_NOTICE, log, 0, "[%s:%d], open file:\"%V\" failed.", __FUNCTION__, __LINE__, &full);
goto failed;
}
if (ngx_fd_info(fd, &file.info) == NGX_FILE_ERROR) {
ngx_log_debug(NGX_LOG_NOTICE, log, 0, "[%s:%d], get file:\"%V\" info failed.", __FUNCTION__, __LINE__, &full);
goto failed;
}
file.fd = fd;
file.name.data = full.data;
file.name.len = full.len;
file.offset = 0;
file.log = log;
buf.start = ngx_alloc(NGX_HTTP_COOKIE_CLEAN_BUFFER, log);
if (buf.start == NULL) {
ngx_log_debug(NGX_LOG_NOTICE, log, 0, "[%s:%d], alloc buffer failed.", __FUNCTION__, __LINE__);
goto failed;
}
buf.pos = buf.start;
buf.last = buf.start;
buf.end = buf.last + NGX_HTTP_COOKIE_CLEAN_BUFFER;
buf.temporary = 1;
file_size = ngx_file_size(&file.info);
while (1) {
s = ngx_http_cookie_read_one_line(&file, &buf, file_size, &n);
if (n == -1) {
ngx_log_debug(NGX_LOG_NOTICE, log, 0, "[%s:%d], read file:\"%V\" failed.", __FUNCTION__, __LINE__, &full);
goto failed;
}
if (n == 0) {
break;
}
if (proc(conf, obj, s, n, p_data) != 0) {
ngx_log_debug(NGX_LOG_NOTICE, log, 0, "[%s:%d], proc one line:\"%*s\" failed.", __FUNCTION__, __LINE__,
n, s);
goto failed;
}
ngx_log_debug(NGX_LOG_NOTICE, log, 0, "[%s:%d], proc one line:\"%*s\" succeed.", __FUNCTION__, __LINE__,
n, s);
}
ngx_log_debug(NGX_LOG_NOTICE, log, 0, "[%s:%d], proc file:\"%V\" succeed.", __FUNCTION__, __LINE__, &full);
goto done;
failed:
rc = NGX_ERROR;
done:
if (full.data != NULL) {
ngx_free(full.data);
full.data = NULL;
}
if (fd != NGX_INVALID_FILE
&& ngx_close_file(fd) == NGX_FILE_ERROR) {
rc = NGX_ERROR;
}
if (buf.start != NULL) {
ngx_free(buf.start);
buf.start = NULL;
}
return rc;
}
static char *
ngx_http_js_include(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_js_loc_conf_t *jlcf = conf;
size_t size;
u_char *start, *end;
ssize_t n;
ngx_fd_t fd;
ngx_str_t *value, file;
nxt_int_t rc;
nxt_str_t text, ext, *export;
nxt_lvlhsh_t externals;
ngx_file_info_t fi;
njs_vm_shared_t *shared;
ngx_pool_cleanup_t *cln;
nxt_mem_cache_pool_t *mcp;
if (jlcf->vm) {
return "is duplicate";
}
value = cf->args->elts;
file = value[1];
if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK) {
return NGX_CONF_ERROR;
}
fd = ngx_open_file(file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_open_file_n " \"%s\" failed", file.data);
return NGX_CONF_ERROR;
}
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", file.data);
(void) ngx_close_file(fd);
return NGX_CONF_ERROR;
}
size = ngx_file_size(&fi);
start = ngx_pnalloc(cf->pool, size);
if (start == NULL) {
(void) ngx_close_file(fd);
return NGX_CONF_ERROR;
}
n = ngx_read_fd(fd, start, size);
if (n == -1) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_read_fd_n " \"%s\" failed", file.data);
(void) ngx_close_file(fd);
return NGX_CONF_ERROR;
}
if ((size_t) n != size) {
ngx_log_error(NGX_LOG_ALERT, cf->log, 0,
ngx_read_fd_n " has read only %z of %O from \"%s\"",
n, size, file.data);
(void) ngx_close_file(fd);
return NGX_CONF_ERROR;
}
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " %s failed", file.data);
}
end = start + size;
mcp = ngx_http_js_create_mem_cache_pool();
if (mcp == NULL) {
return NGX_CONF_ERROR;
}
cln = ngx_pool_cleanup_add(cf->pool, 0);
if (cln == NULL) {
return NULL;
}
cln->handler = ngx_http_js_cleanup_mem_cache_pool;
cln->data = mcp;
shared = NULL;
nxt_lvlhsh_init(&externals);
if (njs_vm_external_add(&externals, mcp, 0, ngx_http_js_externals,
nxt_nitems(ngx_http_js_externals))
!= NJS_OK)
{
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "could not add js externals");
return NGX_CONF_ERROR;
}
jlcf->vm = njs_vm_create(mcp, &shared, &externals);
if (jlcf->vm == NULL) {
return NGX_CONF_ERROR;
}
rc = njs_vm_compile(jlcf->vm, &start, end, NULL, &export);
if (rc != NJS_OK) {
njs_vm_exception(jlcf->vm, &text);
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"%*s, included",
text.length, text.start);
return NGX_CONF_ERROR;
}
if (start != end) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"extra characters in js script: \"%*s\", included",
end - start, start);
return NGX_CONF_ERROR;
}
ext = nxt_string_value("$r");
if (njs_vm_external(jlcf->vm, NULL, &ext, &jlcf->args[0]) != NJS_OK) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"js external \"%*s\" not found",
ext.length, ext.start);
return NGX_CONF_ERROR;
}
ext = nxt_string_value("response");
rc = njs_vm_external(jlcf->vm, &jlcf->args[0], &ext, &jlcf->args[1]);
if (rc != NXT_OK) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"js external \"$r.%*s\" not found",
ext.length, ext.start);
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
char *
ngx_conf_parse(ngx_conf_t *cf, ngx_str_t *filename)
{ //第二个数为保存的配置文件路径的字符串，如/usr/local/nginx/conf/nginx.conf_file
char *rv;
ngx_fd_t fd;
ngx_int_t rc;
ngx_buf_t buf;
ngx_conf_file_t *prev, conf_file;
enum {
parse_file = 0,
parse_block,
parse_param
} type;
#if (NGX_SUPPRESS_WARN)
fd = NGX_INVALID_FILE;
prev = NULL;
#endif
if (filename) { //指向一个配置文件路径字符串，需要函数ngx_conf_parse打开该文件并获取相关的文件信息
/* open configuration file */
fd = ngx_open_file(filename->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_open_file_n " \"%s\" failed",
filename->data);
return NGX_CONF_ERROR;
}
prev = cf->conf_file;
cf->conf_file = &conf_file;
if (ngx_fd_info(fd, &cf->conf_file->file.info) == -1) {
ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", filename->data);
}
cf->conf_file->buffer = &buf;
buf.start = ngx_alloc(NGX_CONF_BUFFER, cf->log); //内存
if (buf.start == NULL) {
goto failed;
}
buf.pos = buf.start; //初始值
buf.last = buf.start;
buf.end = buf.last + NGX_CONF_BUFFER; //4K，到末尾
buf.temporary = 1;
cf->conf_file->file.fd = fd;
cf->conf_file->file.name.len = filename->len;
cf->conf_file->file.name.data = filename->data;
cf->conf_file->file.offset = 0;
cf->conf_file->file.log = cf->log;
cf->conf_file->line = 1;
type = parse_file; //刚刚打开的新文件，包括include指令
} else if (cf->conf_file->file.fd != NGX_INVALID_FILE) {
//说明此时仅解析了部分解析，当遇到复杂配置项，比如events，http等，此时解析的内容还是来自当前文件
type = parse_block;
} else {
//正要开始解析命令行参数配置项值，在对用户通过命令行-g参数输入的配置信息进行解析，如nginx -g 'daemon on'
type = parse_param;
}
for ( ;; ) {
rc = ngx_conf_read_token(cf); //读取token，每次读取一个buffer
/*
* ngx_conf_read_token() may return
*
* NGX_ERROR there is error
* NGX_OK the token terminated by ";" was found
* NGX_CONF_BLOCK_START the token terminated by "{" was found
* NGX_CONF_BLOCK_DONE the "}" was found
* NGX_CONF_FILE_DONE the configuration file is done
*/
if (rc == NGX_ERROR) {
goto done;
}
if (rc == NGX_CONF_BLOCK_DONE) { //解析正常
if (type != parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_FILE_DONE) {
if (type == parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"unexpected end of file, expecting \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_BLOCK_START) {
if (type == parse_param) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"block directives are not supported "
"in -g option");
goto failed;
}
}
/* rc == NGX_OK || rc == NGX_CONF_BLOCK_START */
if (cf->handler) { //进行这些token转换为Nginx内控制变量的值，针对“text/html html htm shtml”等这样的配置项或geo模块里的“192.168.0.0/16 local”这样的不定配置项，进行特殊的处理
/*
* the custom handler, i.e., that is used in the http's
* "types { ... }" directive
*/
rv = (*cf->handler)(cf, NULL, cf->handler_conf);
if (rv == NGX_CONF_OK) {
continue;
}
if (rv == NGX_CONF_ERROR) {
goto failed;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, rv);
goto failed;
}
rc = ngx_conf_handler(cf, rc); //配置转换
if (rc == NGX_ERROR) {
goto failed;
}
}
failed:
rc = NGX_ERROR;
done:
if (filename) {
if (cf->conf_file->buffer->start) {
ngx_free(cf->conf_file->buffer->start);
}
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " %s failed",
filename->data);
return NGX_CONF_ERROR;
}
cf->conf_file = prev;
}
if (rc == NGX_ERROR) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static void
ngx_pipe_log(ngx_cycle_t *cycle, ngx_open_pipe_t *op)
{
ngx_int_t n_bytes_read;
u_char *read_buf;
size_t read_buf_len = 65536;
ngx_fd_t log_fd = NGX_INVALID_FILE;
#ifdef T_PIPE_NO_DISPLAY
size_t title_len;
#endif
ngx_pipe_rollback_conf_t rbcf;
ngx_file_info_t sb;
size_t one_day = 24 * 60 * 60;
ngx_pid = ngx_getpid();
rbcf.last_open_time = 0;
rbcf.last_suit_time = 0;
rbcf.log_size = 0;
if (ngx_pipe_rollback_parse_args(cycle, op, &rbcf) != NGX_OK) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "log rollback parse error");
return;
}
read_buf = ngx_pcalloc(cycle->pool, read_buf_len);
if (read_buf == NULL) {
return;
}
//set title
ngx_setproctitle((char *) op->cmd);
#ifdef T_PIPE_NO_DISPLAY
title_len = ngx_strlen(ngx_os_argv[0]);
#if (NGX_SOLARIS)
#else
ngx_memset((u_char *) ngx_os_argv[0], NGX_SETPROCTITLE_PAD, title_len);
ngx_cpystrn((u_char *) ngx_os_argv[0], op->cmd, title_len);
#endif
#endif
for (;;)
{
if (ngx_terminate == 1) {
return;
}
n_bytes_read = ngx_read_fd(0, read_buf, read_buf_len);
if (n_bytes_read == 0) {
return;
}
if (errno == EINTR) {
continue;
} else if (n_bytes_read < 0) {
return;
}
rbcf.time_now = ngx_pipe_get_now_sec();
if (NULL != rbcf.suitpath) {
if (rbcf.time_now / one_day >
rbcf.last_suit_time / one_day) {
ngx_pipe_create_suitpath(cycle, &rbcf);
}
}
if (log_fd >= 0) {
if (rbcf.interval > 0) {
if (((rbcf.time_now - rbcf.adjust_time) / rbcf.interval) >
(rbcf.last_open_time / rbcf.interval)) {
//need check rollback
ngx_close_file(log_fd);
log_fd = NGX_INVALID_FILE;
ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
"need check rollback time [%s]", rbcf.logname);
ngx_pipe_do_rollback(cycle, &rbcf);
}
}
}
if (log_fd >= 0 && rbcf.log_max_size > 0 &&
rbcf.log_size >= rbcf.log_max_size) {
ngx_close_file(log_fd);
log_fd = NGX_INVALID_FILE;
ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
"need check rollback size [%s] [%d]",
rbcf.logname, rbcf.log_size);
ngx_pipe_do_rollback(cycle, &rbcf);
}
/* If there is no log file open then open a new one.
* */
if (log_fd < 0) {
ngx_pipe_create_subdirs(rbcf.logname, cycle);
if (rbcf.interval > 0 && rbcf.last_open_time == 0
&& ((rbcf.time_now - rbcf.adjust_time_raw) / rbcf.interval < rbcf.time_now / rbcf.interval)) { /*just check
when time is after interval and befor adjust_time_raw, fix when no backup file, do rollback
*/
//need check last rollback time, because other process may do rollback after when it adjust time more than this process
ngx_pipe_get_last_rollback_time(&rbcf);
} else {
rbcf.last_open_time = ngx_pipe_get_now_sec();
}
log_fd = ngx_open_file(rbcf.logname, NGX_FILE_APPEND, NGX_FILE_CREATE_OR_OPEN,
NGX_PIPE_FILE_ACCESS);
if (log_fd < 0) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"open [%s] failed", rbcf.logname);
return;
}
if (0 == ngx_fd_info(log_fd, &sb)) {
rbcf.log_size = sb.st_size;
}
}
if (ngx_write_fd(log_fd, read_buf, n_bytes_read) != n_bytes_read) {
if (errno != EINTR) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"write to [%s] failed", rbcf.logname);
return;
}
}
rbcf.log_size += n_bytes_read;
}
}
static ngx_int_t
ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log)
{
int mode;
ngx_fd_t fd;
ngx_file_info_t fi;
if (of->fd != NGX_INVALID_FILE) {
if (ngx_file_info(name, &fi) == NGX_FILE_ERROR) {
of->failed = ngx_file_info_n;
goto failed;
}
if (of->uniq == ngx_file_uniq(&fi)) {
goto done;
}
} else if (of->test_dir) {
if (ngx_file_info(name, &fi) == NGX_FILE_ERROR) {
of->failed = ngx_file_info_n;
goto failed;
}
if (ngx_is_dir(&fi)) {
goto done;
}
}
if (!of->log) {
/*
* Use non-blocking open() not to hang on FIFO files, etc.
* This flag has no effect on a regular files.
*/
mode = NGX_FILE_RDONLY|NGX_FILE_NONBLOCK;
#if (NGX_WIN32 && NGX_HAVE_FILE_AIO)
if (ngx_event_flags & NGX_USE_IOCP_EVENT && of->aio) {
mode |= NGX_FILE_OVERLAPPED;
}
#endif
fd = ngx_open_file(name, mode, NGX_FILE_OPEN, 0);
} else {
fd = ngx_open_file(name, NGX_FILE_APPEND, NGX_FILE_CREATE_OR_OPEN,
NGX_FILE_DEFAULT_ACCESS);
}
if (fd == NGX_INVALID_FILE) {
of->failed = ngx_open_file_n;
goto failed;
}
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", name);
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%s\" failed", name);
}
of->fd = NGX_INVALID_FILE;
return NGX_ERROR;
}
if (ngx_is_dir(&fi)) {
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%s\" failed", name);
}
of->fd = NGX_INVALID_FILE;
} else {
of->fd = fd;
if (of->read_ahead && ngx_file_size(&fi) > NGX_MIN_READ_AHEAD) {
if (ngx_read_ahead(fd, of->read_ahead) == NGX_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_read_ahead_n " \"%s\" failed", name);
}
}
if (of->directio <= ngx_file_size(&fi)) {
if (ngx_directio_on(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_directio_on_n " \"%s\" failed", name);
} else {
of->is_directio = 1;
}
}
}
done:
of->uniq = ngx_file_uniq(&fi);
of->mtime = ngx_file_mtime(&fi);
of->size = ngx_file_size(&fi);
of->fs_size = ngx_file_fs_size(&fi);
of->is_dir = ngx_is_dir(&fi);
of->is_file = ngx_is_file(&fi);
of->is_link = ngx_is_link(&fi);
of->is_exec = ngx_is_exec(&fi);
return NGX_OK;
failed:
of->fd = NGX_INVALID_FILE;
of->err = ngx_errno;
return NGX_ERROR;
}
ngx_int_t
ngx_copy_file(u_char *from, u_char *to, ngx_copy_file_t *cf)
{
char *buf;
off_t size;
size_t len;
ssize_t n;
ngx_fd_t fd, nfd;
ngx_int_t rc;
ngx_file_info_t fi;
rc = NGX_ERROR;
buf = NULL;
nfd = NGX_INVALID_FILE;
fd = ngx_open_file(from, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_log_error(NGX_LOG_CRIT, cf->log, ngx_errno,
ngx_open_file_n " \"%s\" failed", from);
goto failed;
}
if (cf->size != -1) {
size = cf->size;
} else {
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", from);
goto failed;
}
size = ngx_file_size(&fi);
}
len = cf->buf_size ? cf->buf_size : 65536;
if ((off_t) len > size) {
len = (size_t) size;
}
buf = ngx_alloc(len, cf->log);
if (buf == NULL) {
goto failed;
}
nfd = ngx_open_file(to, NGX_FILE_WRONLY, NGX_FILE_CREATE_OR_OPEN,
cf->access);
if (nfd == NGX_INVALID_FILE) {
ngx_log_error(NGX_LOG_CRIT, cf->log, ngx_errno,
ngx_open_file_n " \"%s\" failed", to);
goto failed;
}
while (size > 0) {
if ((off_t) len > size) {
len = (size_t) size;
}
n = ngx_read_fd(fd, buf, len);
if (n == -1) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_read_fd_n " \"%s\" failed", from);
goto failed;
}
if ((size_t) n != len) {
ngx_log_error(NGX_LOG_ALERT, cf->log, 0,
ngx_read_fd_n " has read only %z of %uz from %s",
n, size, from);
goto failed;
}
n = ngx_write_fd(nfd, buf, len);
if (n == -1) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_write_fd_n " \"%s\" failed", to);
goto failed;
}
if ((size_t) n != len) {
ngx_log_error(NGX_LOG_ALERT, cf->log, 0,
ngx_write_fd_n " has written only %z of %uz to %s",
n, size, to);
goto failed;
}
size -= n;
}
if (cf->time != -1) {
if (ngx_set_file_time(to, nfd, cf->time) != NGX_OK) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_set_file_time_n " \"%s\" failed", to);
goto failed;
}
}
rc = NGX_OK;
failed:
if (nfd != NGX_INVALID_FILE) {
if (ngx_close_file(nfd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " \"%s\" failed", to);
}
}
if (fd != NGX_INVALID_FILE) {
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " \"%s\" failed", from);
}
}
if (buf) {
ngx_free(buf);
}
return rc;
}
/*
* 解析配置文件
*/
char *
ngx_conf_parse(ngx_conf_t *cf, ngx_str_t *filename)
{
char *rv;
ngx_fd_t fd;
ngx_int_t rc;
ngx_buf_t buf;
ngx_conf_file_t *prev, conf_file;
enum {
parse_file = 0,
parse_block,
parse_param
} type;
#if (NGX_SUPPRESS_WARN)
fd = NGX_INVALID_FILE;
prev = NULL;
#endif
if (filename) { //新的配置文件
/* open configuration file */
fd = ngx_open_file(filename->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); //打开文件
if (fd == NGX_INVALID_FILE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_open_file_n " \"%s\" failed",
filename->data);
return NGX_CONF_ERROR;
}
prev = cf->conf_file;
cf->conf_file = &conf_file;
if (ngx_fd_info(fd, &cf->conf_file->file.info) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", filename->data);
}
cf->conf_file->buffer = &buf;
buf.start = ngx_alloc(NGX_CONF_BUFFER, cf->log); //默认4K的缓冲区
if (buf.start == NULL) {
goto failed;
}
buf.pos = buf.start;
buf.last = buf.start;
buf.end = buf.last + NGX_CONF_BUFFER;
buf.temporary = 1;
cf->conf_file->file.fd = fd;
cf->conf_file->file.name.len = filename->len;
cf->conf_file->file.name.data = filename->data;
cf->conf_file->file.offset = 0;
cf->conf_file->file.log = cf->log;
cf->conf_file->line = 1;
type = parse_file;
} else if (cf->conf_file->file.fd != NGX_INVALID_FILE) {
type = parse_block;
} else {
type = parse_param;
}
for ( ;; ) {
rc = ngx_conf_read_token(cf); //读取配置项
/*
* ngx_conf_read_token() may return
*
* NGX_ERROR there is error
* NGX_OK the token terminated by ";" was found
* NGX_CONF_BLOCK_START the token terminated by "{" was found
* NGX_CONF_BLOCK_DONE the "}" was found
* NGX_CONF_FILE_DONE the configuration file is done
*/
if (rc == NGX_ERROR) {
goto done;
}
if (rc == NGX_CONF_BLOCK_DONE) {
if (type != parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_FILE_DONE) {
if (type == parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"unexpected end of file, expecting \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_BLOCK_START) {
if (type == parse_param) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"block directives are not supported "
"in -g option");
goto failed;
}
}
/* rc == NGX_OK || rc == NGX_CONF_BLOCK_START */
if (cf->handler) {
/*
* the custom handler, i.e., that is used in the http's
* "types { ... }" directive
*/
if (rc == NGX_CONF_BLOCK_START) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"{\"");
goto failed;
}
rv = (*cf->handler)(cf, NULL, cf->handler_conf);
if (rv == NGX_CONF_OK) {
continue;
}
if (rv == NGX_CONF_ERROR) {
goto failed;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, rv);
goto failed;
}
/*解析配置项*/
rc = ngx_conf_handler(cf, rc);
if (rc == NGX_ERROR) {
goto failed;
}
}
failed:
rc = NGX_ERROR;
done:
/*配置文件协议完毕，释放相应数据空间*/
if (filename) {
if (cf->conf_file->buffer->start) {
ngx_free(cf->conf_file->buffer->start);
}
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " %s failed",
filename->data);
rc = NGX_ERROR;
}
cf->conf_file = prev;
}
if (rc == NGX_ERROR) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static ngx_int_t
ngx_http_file_cache_add_file(ngx_tree_ctx_t *ctx, ngx_str_t *name)
{
u_char *p;
ngx_fd_t fd;
ngx_int_t n;
ngx_uint_t i;
ngx_file_info_t fi;
ngx_http_cache_t c;
ngx_http_file_cache_t *cache;
ngx_http_file_cache_header_t h;
if (name->len < 2 * NGX_HTTP_CACHE_KEY_LEN) {
return NGX_ERROR;
}
ngx_memzero(&c, sizeof(ngx_http_cache_t));
fd = ngx_open_file(name->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_open_file_n " \"%s\" failed", name->data);
return NGX_ERROR;
}
c.file.fd = fd;
c.file.name = *name;
c.file.log = ctx->log;
n = ngx_read_file(&c.file, (u_char *) &h,
sizeof(ngx_http_file_cache_header_t), 0);
if (n == NGX_ERROR) {
return NGX_ERROR;
}
if ((size_t) n < sizeof(ngx_http_file_cache_header_t)) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, 0,
"cache file \"%s\" is too small", name->data);
return NGX_ERROR;
}
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", name->data);
} else {
c.uniq = ngx_file_uniq(&fi);
c.valid_sec = h.valid_sec;
c.valid_msec = h.valid_msec;
c.body_start = h.body_start;
c.length = ngx_file_size(&fi);
}
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, ctx->log, ngx_errno,
ngx_close_file_n " \"%s\" failed", name->data);
}
if (c.body_start == 0) {
return NGX_ERROR;
}
p = &name->data[name->len - 2 * NGX_HTTP_CACHE_KEY_LEN];
for (i = 0; i < NGX_HTTP_CACHE_KEY_LEN; i++) {
n = ngx_hextoi(p, 2);
if (n == NGX_ERROR) {
return NGX_ERROR;
}
p += 2;
c.key[i] = (u_char) n;
}
cache = ctx->data;
return ngx_http_file_cache_add(cache, &c);
}
void
ngx_http_file_cache_update_header(ngx_http_request_t *r)
{
ssize_t n;
ngx_err_t err;
ngx_file_t file;
ngx_file_info_t fi;
ngx_http_cache_t *c;
ngx_http_file_cache_header_t h;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http file cache update header");
c = r->cache;
ngx_memzero(&file, sizeof(ngx_file_t));
file.name = c->file.name;
file.log = r->connection->log;
file.fd = ngx_open_file(file.name.data, NGX_FILE_RDWR, NGX_FILE_OPEN, 0);
if (file.fd == NGX_INVALID_FILE) {
err = ngx_errno;
/* cache file may have been deleted */
if (err == NGX_ENOENT) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http file cache \"%s\" not found",
file.name.data);
return;
}
ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
ngx_open_file_n " \"%s\" failed", file.name.data);
return;
}
/*
* make sure cache file wasn't replaced;
* if it was, do nothing
*/
if (ngx_fd_info(file.fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", file.name.data);
goto done;
}
if (c->uniq != ngx_file_uniq(&fi)
|| c->length != ngx_file_size(&fi))
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http file cache \"%s\" changed",
file.name.data);
goto done;
}
n = ngx_read_file(&file, (u_char *) &h,
sizeof(ngx_http_file_cache_header_t), 0);
if (n == NGX_ERROR) {
goto done;
}
if ((size_t) n != sizeof(ngx_http_file_cache_header_t)) {
ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
ngx_read_file_n " read only %z of %z from \"%s\"",
n, sizeof(ngx_http_file_cache_header_t), file.name.data);
goto done;
}
if (h.last_modified != c->last_modified
|| h.crc32 != c->crc32
|| h.header_start != c->header_start
|| h.body_start != c->body_start)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http file cache \"%s\" content changed",
file.name.data);
goto done;
}
/*
* update cache file header with new data,
* notably h.valid_sec and h.date
*/
ngx_memzero(&h, sizeof(ngx_http_file_cache_header_t));
h.valid_sec = c->valid_sec;
h.last_modified = c->last_modified;
h.date = c->date;
h.crc32 = c->crc32;
h.valid_msec = (u_short) c->valid_msec;
h.header_start = (u_short) c->header_start;
h.body_start = (u_short) c->body_start;
(void) ngx_write_file(&file, (u_char *) &h,
sizeof(ngx_http_file_cache_header_t), 0);
done:
if (ngx_close_file(file.fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
ngx_close_file_n " \"%s\" failed", file.name.data);
}
}
char *
ngx_conf_parse(ngx_conf_t *cf, ngx_str_t *filename)
{
char *rv;
u_char *p;
off_t size;
ngx_fd_t fd;
ngx_int_t rc;
ngx_buf_t buf, *tbuf;
ngx_conf_file_t *prev, conf_file;
ngx_conf_dump_t *cd;
enum {
parse_file = 0,
parse_block,
parse_param
} type;
#if (NGX_SUPPRESS_WARN)
fd = NGX_INVALID_FILE;
prev = NULL;
#endif
if (filename) {
/* open configuration file */
fd = ngx_open_file(filename->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_open_file_n " \"%s\" failed",
filename->data);
return NGX_CONF_ERROR;
}
prev = cf->conf_file;
cf->conf_file = &conf_file;
if (ngx_fd_info(fd, &cf->conf_file->file.info) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", filename->data);
}
cf->conf_file->buffer = &buf;
buf.start = ngx_alloc(NGX_CONF_BUFFER, cf->log);
if (buf.start == NULL) {
goto failed;
}
buf.pos = buf.start;
buf.last = buf.start;
buf.end = buf.last + NGX_CONF_BUFFER;
buf.temporary = 1;
cf->conf_file->file.fd = fd;
cf->conf_file->file.name.len = filename->len;
cf->conf_file->file.name.data = filename->data;
cf->conf_file->file.offset = 0;
cf->conf_file->file.log = cf->log;
cf->conf_file->line = 1;
type = parse_file;
if (ngx_dump_config
#if (NGX_DEBUG)
|| 1
#endif
)
{
p = ngx_pstrdup(cf->cycle->pool, filename);
if (p == NULL) {
goto failed;
}
size = ngx_file_size(&cf->conf_file->file.info);
tbuf = ngx_create_temp_buf(cf->cycle->pool, (size_t) size);
if (tbuf == NULL) {
goto failed;
}
cd = ngx_array_push(&cf->cycle->config_dump);
if (cd == NULL) {
goto failed;
}
cd->name.len = filename->len;
cd->name.data = p;
cd->buffer = tbuf;
cf->conf_file->dump = tbuf;
} else {
cf->conf_file->dump = NULL;
}
} else if (cf->conf_file->file.fd != NGX_INVALID_FILE) {
type = parse_block;
} else {
type = parse_param;
}
/*这里解析指令的方式是"读取一条、检查一条、解析一条"的方式解析配置文件，这里的一条是以分号或者花括号"{"、"}"为单位，如果遇到嵌套的花括号，则先处理嵌套的指令*/
for ( ;; ) {
/*将配置文件中当前的一条配置指令读取到内存中，判断配置语法是否使用正确，并将该指令保存到cycle->args数组中*/
rc = ngx_conf_read_token(cf);
/*
* ngx_conf_read_token() may return
*
* NGX_ERROR there is error
* NGX_OK the token terminated by ";" was found
* NGX_CONF_BLOCK_START the token terminated by "{" was found
* NGX_CONF_BLOCK_DONE the "}" was found
* NGX_CONF_FILE_DONE the configuration file is done
*/
if (rc == NGX_ERROR) {
goto done;
}
if (rc == NGX_CONF_BLOCK_DONE) {
if (type != parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_FILE_DONE) {
if (type == parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"unexpected end of file, expecting \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_BLOCK_START) {
if (type == parse_param) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"block directives are not supported "
"in -g option");
goto failed;
}
}
/* rc == NGX_OK || rc == NGX_CONF_BLOCK_START */
/*如果该指令定义了自定义处理函数，则调用自定义处理函数进行解析*/
if (cf->handler) {
/*
* the custom handler, i.e., that is used in the http's
* "types { ... }" directive
*/
if (rc == NGX_CONF_BLOCK_START) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"{\"");
goto failed;
}
rv = (*cf->handler)(cf, NULL, cf->handler_conf);
if (rv == NGX_CONF_OK) {
continue;
}
if (rv == NGX_CONF_ERROR) {
goto failed;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, rv);
goto failed;
}
/*调用指令的处理函数*/
rc = ngx_conf_handler(cf, rc);
if (rc == NGX_ERROR) {
goto failed;
}
}
failed:
rc = NGX_ERROR;
done:
if (filename) {
if (cf->conf_file->buffer->start) {
ngx_free(cf->conf_file->buffer->start);
}
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " %s failed",
filename->data);
rc = NGX_ERROR;
}
cf->conf_file = prev;
}
if (rc == NGX_ERROR) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static ngx_int_t
ngx_open_and_stat_file(ngx_str_t *name, ngx_open_file_info_t *of,
ngx_log_t *log)
{
ngx_fd_t fd;
ngx_file_info_t fi;
if (of->fd != NGX_INVALID_FILE) {
if (ngx_file_info_wrapper(name, of, &fi, log) == NGX_FILE_ERROR) {
of->fd = NGX_INVALID_FILE;
return NGX_ERROR;
}
// 判断文件是否被改变
if (of->uniq == ngx_file_uniq(&fi)) {
goto done;
}
} else if (of->test_dir) {
if (ngx_file_info_wrapper(name, of, &fi, log) == NGX_FILE_ERROR) {
of->fd = NGX_INVALID_FILE;
return NGX_ERROR;
}
if (ngx_is_dir(&fi)) {
goto done;
}
}
// 否则重新打开
if (!of->log) {
/*
* Use non-blocking open() not to hang on FIFO files, etc.
* This flag has no effect on a regular files.
*/
fd = ngx_open_file_wrapper(name, of, NGX_FILE_RDONLY|NGX_FILE_NONBLOCK,
NGX_FILE_OPEN, 0, log);
} else {
fd = ngx_open_file_wrapper(name, of, NGX_FILE_APPEND,
NGX_FILE_CREATE_OR_OPEN,
NGX_FILE_DEFAULT_ACCESS, log);
}
if (fd == NGX_INVALID_FILE) {
of->fd = NGX_INVALID_FILE;
return NGX_ERROR;
}
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
ngx_fd_info_n " \"%V\" failed", name);
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%V\" failed", name);
}
of->fd = NGX_INVALID_FILE;
return NGX_ERROR;
}
if (ngx_is_dir(&fi)) {
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%V\" failed", name);
}
of->fd = NGX_INVALID_FILE;
} else {
of->fd = fd;
if (of->read_ahead && ngx_file_size(&fi) > NGX_MIN_READ_AHEAD) {
if (ngx_read_ahead(fd, of->read_ahead) == NGX_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_read_ahead_n " \"%V\" failed", name);
}
}
if (of->directio <= ngx_file_size(&fi)) {
if (ngx_directio_on(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_directio_on_n " \"%V\" failed", name);
} else {
of->is_directio = 1;
}
}
}
done:
of->uniq = ngx_file_uniq(&fi);
of->mtime = ngx_file_mtime(&fi);
of->size = ngx_file_size(&fi);
of->fs_size = ngx_file_fs_size(&fi);
of->is_dir = ngx_is_dir(&fi);
of->is_file = ngx_is_file(&fi);
of->is_link = ngx_is_link(&fi);
of->is_exec = ngx_is_exec(&fi);
return NGX_OK;
}
int
ngx_http_lua_clfactory_bytecode_prepare(lua_State *L,
ngx_http_lua_clfactory_file_ctx_t *lf, int fname_index)
{
int x = 1, size_of_int, size_of_size_t, little_endian,
size_of_inst, version, stripped;
static int num_of_inst = 3, num_of_inter_func = 1;
const char *filename, *emsg, *serr, *bytecode;
size_t size, bytecode_len;
ngx_file_info_t fi;
serr = NULL;
*lf->begin_code.str = LUA_SIGNATURE[0];
if (lf->file_type == NGX_LUA_BT_LJ) {
size = fread(lf->begin_code.str + 1, 1, LJ_HEADERSIZE - 1, lf->f);
if (size != LJ_HEADERSIZE - 1) {
serr = strerror(errno);
emsg = "cannot read header";
goto error;
}
version = *(lf->begin_code.str + 3);
if (ngx_memcmp(lf->begin_code.str, LJ_SIGNATURE,
sizeof(LJ_SIGNATURE) - 1)
|| version != LJ_BCDUMP_VERSION)
{
emsg = "bad byte-code header";
goto error;
}
#if defined(DDEBUG) && (DDEBUG)
{
dd("==LJ_BT_HEADER==");
size_t i;
for (i = 0; i < LJ_HEADERSIZE; i++) {
dd("%ld: 0x%02X", i, (unsigned)(u_char)lf->begin_code.str[i]);
}
dd("==LJ_BT_HEADER_END==");
}
#endif
lf->begin_code_len = LJ_HEADERSIZE;
little_endian = !((*(lf->begin_code.str + 4)) & LJ_BCDUMP_F_BE);
stripped = (*(lf->begin_code.str + 4)) & LJ_BCDUMP_F_STRIP;
if (stripped) {
if (little_endian) {
lf->end_code.ptr = LJ_LITTLE_ENDIAN_CODE_STRIPPED;
} else {
lf->end_code.ptr = LJ_BIG_ENDIAN_CODE_STRIPPED;
}
lf->end_code_len = LJ_CODE_LEN_STRIPPED;
} else {
if (little_endian) {
lf->end_code.ptr = LJ_LITTLE_ENDIAN_CODE;
} else {
lf->end_code.ptr = LJ_BIG_ENDIAN_CODE;
}
lf->end_code_len = LJ_CODE_LEN;
}
if (ngx_fd_info(fileno(lf->f), &fi) == NGX_FILE_ERROR) {
serr = strerror(errno);
emsg = "cannot fstat";
goto error;
}
lf->rest_len = ngx_file_size(&fi) - LJ_HEADERSIZE;
#if defined(DDEBUG) && (DDEBUG)
{
size_t i = 0;
dd("==LJ_END_CODE: %ld rest_len: %ld==", lf->end_code_len,
lf->rest_len);
for (i = 0; i < lf->end_code_len; i++) {
dd("%ld: 0x%02X", i, (unsigned) ((u_char) lf->end_code.ptr[i]));
}
dd("==LJ_END_CODE_END==");
}
#endif
} else {
size = fread(lf->begin_code.str + 1, 1, LUAC_HEADERSIZE - 1, lf->f);
if (size != LUAC_HEADERSIZE - 1) {
serr = strerror(errno);
emsg = "cannot read header";
goto error;
}
version = *(lf->begin_code.str + 4);
little_endian = *(lf->begin_code.str + 6);
size_of_int = *(lf->begin_code.str + 7);
size_of_size_t = *(lf->begin_code.str + 8);
size_of_inst = *(lf->begin_code.str + 9);
#if defined(DDEBUG) && (DDEBUG)
{
dd("==LUA_BT_HEADER==");
size_t i;
for (i = 0; i < LUAC_HEADERSIZE; i++) {
dd("%ld, 0x%02X", i, (unsigned)(u_char)lf->begin_code.str[i]);
}
dd("==LUA_BT_HEADER_END==");
}
#endif
if (ngx_memcmp(lf->begin_code.str, LUA_SIGNATURE,
sizeof(LUA_SIGNATURE) -1)
|| version != LUAC_VERSION
|| little_endian != (int) (*(char *) &x)
|| size_of_int != sizeof(int)
|| size_of_size_t != sizeof(size_t)
|| (size_of_inst != 4 && size_of_inst != 8))
{
emsg = "bad byte-code header";
goto error;
}
/* clear the following fields to zero:
* - source string length
* - start line
* - last line
*/
ngx_memzero(lf->begin_code.str + POS_SOURCE_STR_LEN,
sizeof(size_t) + sizeof(int) * 2);
/* number of upvalues */
*(lf->begin_code.str + POS_NUM_OF_UPVS) = 0;
/* number of paramters */
*(lf->begin_code.str + POS_NUM_OF_PARA) = 0;
/* is var-argument function? */
*(lf->begin_code.str + POS_IS_VAR_ARG) = 2;
/* max stack size */
*(lf->begin_code.str + POS_MAX_STACK_SIZE) = 2;
/* number of bytecode instructions */
ngx_memcpy(lf->begin_code.str + POS_NUM_OF_INST, &num_of_inst,
sizeof(int));
lf->begin_code_len = POS_BYTECODE;
if (little_endian) {
if (size_of_inst == 4) {
bytecode = LUA_LITTLE_ENDIAN_4BYTES_CODE;
bytecode_len = LUA_LITTLE_ENDIAN_4BYTES_CODE_LEN;
} else {
bytecode = LUA_LITTLE_ENDIAN_8BYTES_CODE;
bytecode_len = LUA_LITTLE_ENDIAN_8BYTES_CODE_LEN;
}
} else {
if (size_of_inst == 4) {
bytecode = LUA_BIG_ENDIAN_4BYTES_CODE;
bytecode_len = LUA_BIG_ENDIAN_4BYTES_CODE_LEN;
} else {
bytecode = LUA_BIG_ENDIAN_8BYTES_CODE;
bytecode_len = LUA_BIG_ENDIAN_8BYTES_CODE_LEN;
}
}
/* bytecode */
ngx_memcpy(lf->begin_code.str + POS_BYTECODE, bytecode, bytecode_len);
/* number of consts */
ngx_memzero(lf->begin_code.str + POS_BYTECODE + bytecode_len,
sizeof(int));
/* number of internal functions */
ngx_memcpy(lf->begin_code.str + POS_BYTECODE + bytecode_len
+ sizeof(int), &num_of_inter_func, sizeof(int));
lf->begin_code_len += bytecode_len + sizeof(int) + sizeof(int);
#if defined(DDEBUG) && (DDEBUG)
{
size_t i = 0;
dd("==LUA_BEGIN_CODE: %ld==", lf->begin_code_len);
for (i = 0; i < lf->begin_code_len; i++) {
dd("%ld: 0x%02X", i, (unsigned) ((u_char) lf->begin_code.str[i]));
}
dd("==LUA_BEGIN_CODE_END==");
}
#endif
/* clear the following fields to zero:
* - lineinfo vector size
* - number of local vars
* - number of upvalues
*/
ngx_memzero(lf->end_code.str, sizeof(int) * 3);
lf->end_code_len = sizeof(int) + sizeof(int) + sizeof(int);
#if defined(DDEBUG) && (DDEBUG)
{
size_t i = 0;
dd("==LUA_END_CODE: %ld==", lf->end_code_len);
for (i = 0; i < lf->end_code_len; i++) {
dd("%ld: 0x%02X", i, (unsigned) ((u_char) lf->end_code.str[i]));
}
dd("==LUA_END_CODE_END==");
}
#endif
}
return 0;
error:
fclose(lf->f); /* close file (even in case of errors) */
filename = lua_tostring(L, fname_index) + 1;
if (serr) {
lua_pushfstring(L, "%s in %s: %s", emsg, filename, serr);
} else {
lua_pushfstring(L, "%s in %s", emsg, filename);
}
lua_remove(L, fname_index);
return LUA_ERRFILE;
}
char *ngx_conf_parse(ngx_conf_t *cf, ngx_str_t *filename)
{
int m, rc, found, valid;
char *rv;
void *conf, **confp;
ngx_fd_t fd;
ngx_str_t *name;
ngx_conf_file_t *prev;
ngx_command_t *cmd;
#if (NGX_SUPPRESS_WARN)
fd = NGX_INVALID_FILE;
prev = NULL;
#endif
if (filename)
{
/* open configuration file */
fd = ngx_open_file(filename->data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
if (fd == NGX_INVALID_FILE)
{
ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
ngx_open_file_n " %s failed", filename->data);
return NGX_CONF_ERROR;
}
prev = cf->conf_file;
if (!(cf->conf_file = ngx_palloc(cf->pool, sizeof(ngx_conf_file_t))))
{
return NGX_CONF_ERROR;
}
if (ngx_fd_info(fd, &cf->conf_file->file.info) == -1)
{
ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
ngx_fd_info_n " %s failed", filename->data);
}
if (!(cf->conf_file->buffer = ngx_create_temp_buf(cf->pool, 1024)))
{
return NGX_CONF_ERROR;
}
cf->conf_file->file.fd = fd;
cf->conf_file->file.name.len = filename->len;
cf->conf_file->file.name.data = filename->data;
cf->conf_file->file.offset = 0;
cf->conf_file->file.log = cf->log;;
cf->conf_file->line = 1;
}
for ( ;; )
{
rc = ngx_conf_read_token(cf);
/*
* ngx_conf_read_token() returns NGX_OK, NGX_ERROR,
* NGX_CONF_FILE_DONE or NGX_CONF_BLOCK_DONE
*/
#if 0
ngx_log_debug(cf->log, "token %d" _ rc);
#endif
if (rc == NGX_ERROR)
{
break;
}
if (rc != NGX_OK)
{
break;
}
if (cf->handler)
{
/* custom handler, i.e. used in http "types { ... }" directive */
rv = (*cf->handler)(cf, NULL, cf->handler_conf);
if (rv == NGX_CONF_OK)
{
continue;
}
else if (rv == NGX_CONF_ERROR)
{
rc = NGX_ERROR;
break;
}
else
{
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"%s in %s:%d",
rv,
cf->conf_file->file.name.data,
cf->conf_file->line);
rc = NGX_ERROR;
break;
}
}
name = (ngx_str_t *) cf->args->elts;
found = 0;
for (m = 0; rc != NGX_ERROR && !found && ngx_modules[m]; m++)
{
/* look up the directive in the appropriate modules */
if (ngx_modules[m]->type != NGX_CONF_MODULE
&& ngx_modules[m]->type != cf->module_type)
{
continue;
}
cmd = ngx_modules[m]->commands;
if (cmd == NULL)
{
continue;
}
while (cmd->name.len)
{
if (name->len == cmd->name.len
&& ngx_strcmp(name->data, cmd->name.data) == 0)
{
found = 1;
#if 0
ngx_log_debug(cf->log, "command '%s'" _ cmd->name.data);
#endif
/* is the directive's location right ? */
if ((cmd->type & cf->cmd_type) == 0)
{
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"directive \"%s\" in %s:%d "
"is not allowed here",
name->data,
cf->conf_file->file.name.data,
cf->conf_file->line);
rc = NGX_ERROR;
break;
}
/* is the directive's argument count right ? */
if (cmd->type & NGX_CONF_ANY)
{
valid = 1;
}
else if (cmd->type & NGX_CONF_FLAG)
{
if (cf->args->nelts == 2)
{
valid = 1;
}
else
{
valid = 0;
}
}
else if (cmd->type & NGX_CONF_1MORE)
{
if (cf->args->nelts > 1)
{
valid = 1;
}
else
{
valid = 0;
}
}
else if (cmd->type & NGX_CONF_2MORE)
{
if (cf->args->nelts > 2)
{
valid = 1;
}
else
{
valid = 0;
}
}
else if (cf->args->nelts <= 10
&& (cmd->type
& argument_number[cf->args->nelts - 1]))
{
valid = 1;
}
else
{
valid = 0;
}
if (!valid)
{
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"invalid number arguments in "
"directive \"%s\" in %s:%d",
name->data,
cf->conf_file->file.name.data,
cf->conf_file->line);
rc = NGX_ERROR;
break;
}
/* set up the directive's configuration context */
conf = NULL;
if (cmd->type & NGX_DIRECT_CONF)
{
conf = ((void **) cf->ctx)[ngx_modules[m]->index];
}
else if (cmd->type & NGX_MAIN_CONF)
{
conf = &(((void **) cf->ctx)[ngx_modules[m]->index]);
}
else if (cf->ctx)
{
confp = *(void **) ((char *) cf->ctx + cmd->conf);
if (confp)
{
conf = confp[ngx_modules[m]->ctx_index];
}
}
rv = cmd->set(cf, cmd, conf);
#if 0
ngx_log_debug(cf->log, "rv: %d" _ rv);
#endif
if (rv == NGX_CONF_OK)
{
break;
}
else if (rv == NGX_CONF_ERROR)
{
rc = NGX_ERROR;
break;
}
else
{
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"the \"%s\" directive %s in %s:%d",
name->data, rv,
cf->conf_file->file.name.data,
cf->conf_file->line);
rc = NGX_ERROR;
break;
}
}
cmd++;
}
}
if (!found)
{
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"unknown directive \"%s\" in %s:%d",
name->data,
cf->conf_file->file.name.data,
cf->conf_file->line);
rc = NGX_ERROR;
break;
}
if (rc == NGX_ERROR)
{
break;
}
}
if (filename)
{
cf->conf_file = prev;
if (ngx_close_file(fd) == NGX_FILE_ERROR)
{
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " %s failed",
cf->conf_file->file.name.data);
return NGX_CONF_ERROR;
}
}
if (rc == NGX_ERROR)
{
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static ngx_int_t
ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log)
{
ngx_fd_t fd;
ngx_file_info_t fi;
of->fd = NGX_INVALID_FILE;
if (of->test_dir) {
if (ngx_file_info(name, &fi) == -1) {
of->err = ngx_errno;
return NGX_ERROR;
}
of->uniq = ngx_file_uniq(&fi);
of->mtime = ngx_file_mtime(&fi);
of->size = ngx_file_size(&fi);
of->is_dir = ngx_is_dir(&fi);
of->is_file = ngx_is_file(&fi);
of->is_link = ngx_is_link(&fi);
of->is_exec = ngx_is_exec(&fi);
if (of->is_dir) {
return NGX_OK;
}
}
fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
of->err = ngx_errno;
return NGX_ERROR;
}
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", name);
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%s\" failed", name);
}
return NGX_ERROR;
}
if (ngx_is_dir(&fi)) {
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_close_file_n " \"%s\" failed", name);
}
fd = NGX_INVALID_FILE;
}
of->fd = fd;
of->uniq = ngx_file_uniq(&fi);
of->mtime = ngx_file_mtime(&fi);
of->size = ngx_file_size(&fi);
of->is_dir = ngx_is_dir(&fi);
of->is_file = ngx_is_file(&fi);
of->is_link = ngx_is_link(&fi);
of->is_exec = ngx_is_exec(&fi);
return NGX_OK;
}
void
ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf)
{
off_t size, length;
ngx_int_t rc;
ngx_file_uniq_t uniq;
ngx_file_info_t fi;
ngx_http_cache_t *c;
ngx_ext_rename_file_t ext;
ngx_http_file_cache_t *cache;
c = r->cache;
if (c->updated) {
return;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http file cache update");
c->updated = 1;
cache = c->file_cache;
uniq = 0;
length = 0;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http file cache rename: \"%s\" to \"%s\"",
tf->file.name.data, c->file.name.data);
ext.access = NGX_FILE_OWNER_ACCESS;
ext.path_access = NGX_FILE_OWNER_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, &c->file.name, &ext);
if (rc == NGX_OK) {
if (ngx_fd_info(tf->file.fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", tf->file.name.data);
rc = NGX_ERROR;
} else {
uniq = ngx_file_uniq(&fi);
length = ngx_file_size(&fi);
}
}
size = (length + cache->bsize - 1) / cache->bsize;
ngx_shmtx_lock(&cache->shpool->mutex);
c->node->count--;
c->node->uniq = uniq;
c->node->body_start = c->body_start;
size = size - (c->node->length + cache->bsize - 1) / cache->bsize;
c->node->length = length;
cache->sh->size += size;
if (rc == NGX_OK) {
c->node->exists = 1;
}
c->node->updating = 0;
ngx_shmtx_unlock(&cache->shpool->mutex);
}
char *
ngx_conf_parse(ngx_conf_t *cf, ngx_str_t *filename)
{
char *rv;
u_char *p;
off_t size;
ngx_fd_t fd;
ngx_int_t rc;
ngx_buf_t buf, *tbuf;
ngx_conf_file_t *prev, conf_file;
ngx_conf_dump_t *cd;
enum {
parse_file = 0, //解析配置文件(初始配置文件解析)
parse_block, //解析配置文件中的块
parse_param //解析-g选项携带的参数
} type;
#if (NGX_SUPPRESS_WARN)
fd = NGX_INVALID_FILE;
prev = NULL;
#endif
if (filename) {
/* open configuration file */
/*打开配置文件nginx.conf*/
fd = ngx_open_file(filename->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_open_file_n " \"%s\" failed",
filename->data);
return NGX_CONF_ERROR;
}
/*保存之前的cf->conf_file*/
prev = cf->conf_file;
cf->conf_file = &conf_file;
/*获取文件信息，如uid gid等*/
if (ngx_fd_info(fd, &cf->conf_file->file.info) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", filename->data);
}
/*
* 函数ngx_conf_read_token对配置文件内容逐个字符扫描并解析为单个的token，当然，该函数并不会频繁的去读取
* 配置文件，它每次从文件内读取足够多的内容以填满一个大小为NGX_CONF_BUFFER的缓存区（除了最后一次，即配置
* 文件剩余内容本来就不够了），这个缓存区在函数 ngx_conf_parse内申请并保存引用到变量cf->conf_file->buffer内，
* 函数 ngx_conf_read_token反复使用该缓存区
*/
/*构建cf->conf_file->buffer缓冲区*/
cf->conf_file->buffer = &buf;
buf.start = ngx_alloc(NGX_CONF_BUFFER, cf->log);
if (buf.start == NULL) {
goto failed;
}
buf.pos = buf.start;
buf.last = buf.start;
buf.end = buf.last + NGX_CONF_BUFFER;
buf.temporary = 1;
/*cf->conf_file指向当前配置文件/usr/local/nginx/conf/nginx.conf*/
cf->conf_file->file.fd = fd;
cf->conf_file->file.name.len = filename->len;
cf->conf_file->file.name.data = filename->data;
cf->conf_file->file.offset = 0;
cf->conf_file->file.log = cf->log;
cf->conf_file->line = 1;
type = parse_file;
/*复制一份配置文件*/
if (ngx_dump_config
#if (NGX_DEBUG)
|| 1
#endif
)
{
p = ngx_pstrdup(cf->cycle->pool, filename);
if (p == NULL) {
goto failed;
}
size = ngx_file_size(&cf->conf_file->file.info);
tbuf = ngx_create_temp_buf(cf->cycle->pool, (size_t) size);
if (tbuf == NULL) {
goto failed;
}
cd = ngx_array_push(&cf->cycle->config_dump);
if (cd == NULL) {
goto failed;
}
cd->name.len = filename->len;
cd->name.data = p;
cd->buffer = tbuf;
cf->conf_file->dump = tbuf;
} else {
cf->conf_file->dump = NULL;
}
} else if (cf->conf_file->file.fd != NGX_INVALID_FILE) {
type = parse_block;
} else {
type = parse_param;
}
for ( ;; ) {
/*
* 读取文件中的内容放到缓冲区中cf->conf_file->buffer，并进行解析，把解析的结果放到了cf->args 里面， 指令的每个单词都在数组中
* 占一个位置，比如 set debug off ，那么数组中存三个位置。
*/
rc = ngx_conf_read_token(cf);
/*
* ngx_conf_read_token() may return
*
* NGX_ERROR there is error
* NGX_OK the token terminated by ";" was found
* NGX_CONF_BLOCK_START the token terminated by "{" was found
* NGX_CONF_BLOCK_DONE the "}" was found
* NGX_CONF_FILE_DONE the configuration file is done
*/
if (rc == NGX_ERROR) {
goto done;
}
/*NGX_CONF_BLOCK_DONE解析块结束*/
if (rc == NGX_CONF_BLOCK_DONE) {
if (type != parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_FILE_DONE) {
if (type == parse_block) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"unexpected end of file, expecting \"}\"");
goto failed;
}
goto done;
}
if (rc == NGX_CONF_BLOCK_START) {
if (type == parse_param) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"block directives are not supported "
"in -g option");
goto failed;
}
}
/* rc == NGX_OK || rc == NGX_CONF_BLOCK_START */
if (cf->handler) {
/*
* the custom handler, i.e., that is used in the http's
* "types { ... }" directive
*/
if (rc == NGX_CONF_BLOCK_START) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"{\"");
goto failed;
}
rv = (*cf->handler)(cf, NULL, cf->handler_conf);
if (rv == NGX_CONF_OK) {
continue;
}
if (rv == NGX_CONF_ERROR) {
goto failed;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, rv);
goto failed;
}
rc = ngx_conf_handler(cf, rc);
if (rc == NGX_ERROR) {
goto failed;
}
}
failed:
rc = NGX_ERROR;
done:
/*解析结束，恢复环境，关闭文件，释放内存*/
if (filename) {
if (cf->conf_file->buffer->start) {
ngx_free(cf->conf_file->buffer->start);
}
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " %s failed",
filename->data);
rc = NGX_ERROR;
}
cf->conf_file = prev;
}
if (rc == NGX_ERROR) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
