nginx 模块学习 持续篇

根据网上的代码开始学习，如下：

网上代码为：http://www.codinglabs.org/html/intro-of-nginx-module-development.html

后来我想自己输出数据：修改代码为：

ngx_http_echo_handler(ngx_http_request_t *r)

{

    ngx_int_t rc;

    ngx_buf_t *b;

    ngx_chain_t out;

     ngx_http_echo_loc_conf_t *elcf;

    elcf = ngx_http_get_module_loc_conf(r, ngx_http_echo_module);

 

    if(!(r->method & (NGX_HTTP_HEAD|NGX_HTTP_GET|NGX_HTTP_POST)))

    {

        return NGX_HTTP_NOT_ALLOWED;

    }

    r->headers_out.content_type.len = sizeof("text/html") - 1;

    r->headers_out.content_type.data = (u_char *) "text/html";

    r->headers_out.status = NGX_HTTP_OK;

    r->headers_out.content_length_n = elcf->ed.len;

if(r->method == NGX_HTTP_HEAD)

    {

        rc = ngx_http_send_header(r);

        if(rc != NGX_OK)

        {

            return rc;

        }

    }

   b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));

    if(b == NULL)

    {

        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "Failed to allocate response buffer.");

        return NGX_HTTP_INTERNAL_SERVER_ERROR;

    }

    out.buf = b;

    out.next = NULL;

// b->pos = elcf->ed.data;

b->pos = (u_char *) "gy";

    b->last = elcf->ed.data + (elcf->ed.len);

//b->last = b->pos + sizeof("ffgy") - 1; 

//ngx_buf_t  *c;

  //  c = ngx_calloc_buf(r->pool);

    //if (c == NULL) {

      //  return NGX_ERROR;

    //}

//c->pos = (u_char *) "";

    //c->last = c->pos + sizeof("") - 1;

 // ngx_chain_t   added_link;

   // added_link.buf = c;

    //added_link.next = NULL;

//out.next = added_link;

  b->memory = 1;

    b->last_buf = 1;

//added_link->buf->last_buf = 1;

  rc = ngx_http_send_header(r);

    if(rc != NGX_OK)

    {

        return rc;

    }

    return ngx_http_output_filter(r, &out);

}

输出为gy。

每次修改一次源c文件的时候都要 config和make&make install 一次nginx源码，生成新的nginx