nginx – 解决http请求

每个配置项都有这个结构:

struct ngx_http_core_loc_conf_s { ... ngx_http_handler_pt handler; ...};typedef ngx_int_t (*ngx_http_handler_pt)(ngx_http_request_t *r);

需要先define http request的return value (NGX_HTTP_OK… /src/http/ngx_http_request.h)

也可以返回nginx global error code:

#define NGX_OK 0 //繼續執行#define NGX_ERROR -1 #define NGX_AGAIN -2 //結束目前handler處理#define NGX_BUSY -3#define NGX_DONE -4 //框架不再執行#define NGX_DECLINED -5 //在同phase繼續找對該請求有興趣的module#define NGX_ABORT -6#define NGX_NEXT -7

ngx_http_request_s

• method: NGX_HTTP_GET(0x0002), NGX_HTTP_POST(0x0008)…使用&判断flag

• uri

• http_version

• header_in: 未经解析的http header

接收http header

ngx_http_request_t -> header_in存放接收到的header

接收http body

ngx_int_t ngx_http_read_client_request_body(ngx_http_request_t*r, ngx_http_client_body_handler_pt post_handler)

异步, 调使用时表示要求nginx开始接收request body, 接收完调使用post_handler.

发送http response header

ngx_int_t ngx_http_send_header(ngx_http_request_t *r);static ngx_int_t ngx_http_header_filter(ngx_http_request_t *r)//ngx_http_request_t -> header_out存放response header

例子:

nginx

发送http response body

ngx_int_t ngx_http_output_filter(ngx_http_request_t *r, ngx_chain_t *in)

ngx_chain_t *in使用于容纳ngx_buf_t

例子:

ngx_buf_t *b = ngx_create_temp_buf(r->pool, 128);ngx_chain_t out;out.buf = b;out.next = NULL;return ngx_http_output_filter(r, &out); //發送response body

ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size)//nginx做的封装，创造暂存区

nginx

nginx