ngx_conf_parse

配置文件 

#user  nobody;
worker_processes  1;#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;#pid        logs/nginx.pid;events {worker_connections  1024;
}http {#include       mime.types;#default_type  application/octet-stream;#log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '#                  '$status $body_bytes_sent "$http_referer" '#                  '"$http_user_agent" "$http_x_forwarded_for"';#access_log  logs/access.log  main;#sendfile        on;#tcp_nopush     on;#keepalive_timeout  0;#keepalive_timeout  65;#gzip  on;server {listen       80;server_name  localhost;#charset koi8-r;#access_log  logs/host.access.log  main;location / {root   html;index  index.html index.htm;}#error_page  404              /404.html;# redirect server error pages to the static page /50x.html#error_page   500 502 503 504  /50x.html;location = /50x.html {root   html;}# proxy the PHP scripts to Apache listening on 127.0.0.1:80##location ~ \.php$ {#    proxy_pass   http://127.0.0.1;#}# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000##location ~ \.php$ {#    root           html;#    fastcgi_pass   127.0.0.1:9000;#    fastcgi_index  index.php;#    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;#    include        fastcgi_params;#}# deny access to .htaccess files, if Apache's document root# concurs with nginx's one##location ~ /\.ht {#    deny  all;#}}# another virtual host using mix of IP-, name-, and port-based configuration##server {#    listen       8000;#    listen       somename:8080;#    server_name  somename  alias  another.alias;#    location / {#        root   html;#        index  index.html index.htm;#    }#}# HTTPS server##server {#    listen       443 ssl;#    server_name  localhost;#    ssl_certificate      cert.pem;#    ssl_certificate_key  cert.key;#    ssl_session_cache    shared:SSL:1m;#    ssl_session_timeout  5m;#    ssl_ciphers  HIGH:!aNULL:!MD5;#    ssl_prefer_server_ciphers  on;#    location / {#        root   html;#        index  index.html index.htm;#    }#}}

 

    } else if (cf->conf_file->file.fd != NGX_INVALID_FILE) {type = parse_block;

    for ( ;; ) {rc = ngx_conf_read_token(cf);

接下来略过注释读取 35行的

    server {

以 { 结束

接下来 ：

        rc = ngx_conf_handler(cf, rc);

处理读取的 token

---

进入 ngx_conf_handler 

    name = cf->args->elts;found = 0;

此时要 处理的指令是 server

    for (i = 0; cf->cycle->modules[i]; i++) {cmd = cf->cycle->modules[i]->commands;if (cmd == NULL) {continue;}for ( /* void */ ; cmd->name.len; cmd++) {if (name->len != cmd->name.len) {continue;}if (ngx_strcmp(name->data, cmd->name.data) != 0) {continue;}

遍历，查找 server 指令

直到

i=9

modules[9]->name=ngx_http_core_module

然后通过语法检查

            else if (cf->ctx) {confp = *(void **) ((char *) cf->ctx + cmd->conf);if (confp) {conf = confp[cf->cycle->modules[i]->ctx_index];}}

 此时 

cmd->conf=0
ctx_index=0

 

rv = cmd->set(cf, cmd, conf);

此时是

ngx_http_core_module 模块的

server 指令的set 函数指针

 

---

ngx_http_core_module

定义在 src/http/ngx_http_core_module.c

ngx_module_t  ngx_http_core_module = {NGX_MODULE_V1,&ngx_http_core_module_ctx,             /* module context */ngx_http_core_commands,                /* module directives */NGX_HTTP_MODULE,                       /* module type */NULL,                                  /* init master */NULL,                                  /* init module */NULL,                                  /* init process */NULL,                                  /* init thread */NULL,                                  /* exit thread */NULL,                                  /* exit process */NULL,                                  /* exit master */NGX_MODULE_V1_PADDING
};

ngx_http_core_commands

static ngx_command_t  ngx_http_core_commands[] = {...{ ngx_string("server"),NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,ngx_http_core_server,0,0,NULL },
...

set 是 ngx_http_core_server

ngx_http_core_server-CSDN博客

---

            if (rv == NGX_CONF_OK) {return NGX_OK;}

返回 NGX_OK 

---

 回到 ngx_conf_parse

rc = ngx_conf_read_token(cf);

继续读取 token

接下来读取的是

117 行的

}

rc == NGX_CONF_BLOCK_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;}

 

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;
}

此时

filename=NULL

返回 NGX_CONF_OK