module hello 2

command

@@ -7,6 +7,7 @@ auto/configure  --prefix=/usr/local/nginx_learn_install \
     --with-http_gzip_static_module \
     --with-pcre \
     --with-http_addition_module \
-    --add-module=/root/nginx_source_learn/extend/ngx_http_hello_module
+    --add-module=/root/nginx_source_learn/extend/ngx_http_hello_module \
+    --add-module=/root/nginx_source_learn/extend/ngx_http_hello_module2
 
 make CFLAGS="-g -o0"

extend/ngx_http_hello_module2/config

@@ -0,0 +1,3 @@
+ngx_addon_name=ngx_http_hello_module2
+HTTP_MODULES="$HTTP_MODULES ngx_http_hello_module2"
+NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_hello_module2.c"

extend/ngx_http_hello_module2/ngx_http_hello_module2.c

@@ -0,0 +1,132 @@
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_http.h>
+
+static ngx_int_t ngx_http_hello_handler2(ngx_http_request_t *r);
+
+static char *
+ngx_http_hello2(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+
+static ngx_int_t ngx_http_hello_init(ngx_conf_t *cf);
+static ngx_int_t ngx_http_hello_log_handler(ngx_http_request_t *r);
+
+/**
+ * 处理nginx.conf中的配置命令解析
+ * 例如：
+ * location /hello {
+ *  	hello
+ * }
+ * 当用户请求:http://127.0.0.1/hello的时候，请求会跳转到hello这个配置上
+ * hello的命令行解析回调函数：ngx_http_hello
+ */
+static ngx_command_t ngx_http_hello_commands2[] = { {
+ngx_string("hello2"),
+NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_HTTP_LMT_CONF
+		| NGX_CONF_NOARGS, ngx_http_hello2,
+NGX_HTTP_LOC_CONF_OFFSET, 0, NULL },
+ngx_null_command };
+
+/**
+ * 模块上下文
+ */
+static ngx_http_module_t ngx_http_hello_module_ctx2 = { NULL, ngx_http_hello_init, NULL, NULL,
+		NULL, NULL, NULL, NULL };
+
+/**
+ * 模块的定义
+ */
+ngx_module_t ngx_http_hello_module2 = {
+NGX_MODULE_V1, &ngx_http_hello_module_ctx2, ngx_http_hello_commands2,
+NGX_HTTP_MODULE, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+NGX_MODULE_V1_PADDING };
+
+/**
+ * 命令解析的回调函数
+ * 该函数中，主要获取loc的配置，并且设置location中的回调函数handler
+ */
+static char *
+ngx_http_hello2(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) {
+	ngx_http_core_loc_conf_t *clcf;
+
+	clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
+	/* 设置回调函数。当请求http://127.0.0.1/hello的时候，会调用此回调函数 */
+	clcf->handler = ngx_http_hello_handler2;
+
+	return NGX_CONF_OK;
+}
+
+/**
+ * 模块回调函数，输出hello world
+ */
+static ngx_int_t ngx_http_hello_handler2(ngx_http_request_t *r) {
+	if (!(r->method & (NGX_HTTP_GET | NGX_HTTP_HEAD))) {
+		return NGX_HTTP_NOT_ALLOWED;
+	}
+
+	ngx_int_t rc = ngx_http_discard_request_body(r);
+	if (rc != NGX_OK) {
+		return rc;
+	}
+
+	ngx_str_t type = ngx_string("text/plain");
+	ngx_str_t response = ngx_string("Hello World2");
+	r->headers_out.status = NGX_HTTP_OK;
+	r->headers_out.content_length_n = response.len;
+	r->headers_out.content_type = type;
+
+	rc = ngx_http_send_header(r);
+	if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
+		return rc;
+	}
+
+	ngx_buf_t *b;
+	b = ngx_create_temp_buf(r->pool, response.len);
+	if (b == NULL) {
+		return NGX_HTTP_INTERNAL_SERVER_ERROR;
+	}
+
+	ngx_memcpy(b->pos, response.data, response.len);
+	b->last = b->pos + response.len;
+	b->last_buf = 1;
+
+	ngx_chain_t out;
+	out.buf = b;
+	out.next = NULL;
+
+    ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                            "hello world ");
+
+	return ngx_http_output_filter(r, &out);
+}
+
+/**
+ * 初始化
+ * 将ngx_http_hello_log_handler挂载到NGX_HTTP_LOG_PHASE日志处理阶段
+ */
+static ngx_int_t ngx_http_hello_init(ngx_conf_t *cf) {
+	ngx_http_handler_pt *h;
+	ngx_http_core_main_conf_t *cmcf;
+
+	cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
+
+	h = ngx_array_push(&cmcf->phases[NGX_HTTP_LOG_PHASE].handlers);
+	if (h == NULL) {
+		return NGX_ERROR;
+	}
+
+	*h = ngx_http_hello_log_handler;
+
+	return NGX_OK;
+}
+
+/**
+ * NGX_HTTP_LOG_PHASE日志处理阶段的回调函数å
+ */
+static ngx_int_t ngx_http_hello_log_handler(ngx_http_request_t *r) {
+
+	/* 仅仅在日志处理阶段，新增加一行日志 */
+    ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                            "hello2 ==================================> ");
+
+	return NGX_DECLINED;
+}