nginx send back content post by client

来源：互联网发布：智慧树网络课程好过吗? 编辑：程序博客网时间：2024/06/18 07:04

试了下post 内容到nginx，然后在nginx把该内容原样返回给client，内容在http body填充。

网上找不到可以参考的例子，代码是边查资料边结合源码边用gdb调试写出来的，也不知道API用得对不对，流程对不对，先记下来，再慢慢深入以及完善。

/***/#include <ngx_core.h>#include <ngx_http.h>#include <ngx_config.h>static ngx_str_t data = ngx_string("nginx.\n");static char *ngx_http_test_init(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);static ngx_int_t ngx_http_test_handler(ngx_http_request_t *r);static void ngx_http_test_body_handler(ngx_http_request_t *r);static ngx_command_t ngx_http_test_commands[] = {    {    ngx_string("test"),    NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,    ngx_http_test_init,    NGX_HTTP_LOC_CONF_OFFSET,    0,    NULL},    ngx_null_command};static ngx_http_module_t ngx_http_test_ctx = {    NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL};ngx_module_t ngx_http_test_module = {    NGX_MODULE_V1,&ngx_http_test_ctx,ngx_http_test_commands,NGX_HTTP_MODULE,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};static char *ngx_http_test_init(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);clcf->handler = ngx_http_test_handler;/* *ngx_conf_set_str_slot(cf,cmd,conf); */return NGX_CONF_OK;}static ngx_int_tngx_http_test_handler(ngx_http_request_t *r) {    ngx_int_t   rc;/*if (r->method & NGX_HTTP_POST) {    return NGX_HTTP_NOT_ALLOWED;}rc = ngx_http_discard_request_body(r);if (NGX_OK != rc) {    return rc;}*/    rc = ngx_http_read_client_request_body(r, ngx_http_test_body_handler);    if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {        return rc;    }return NGX_OK;}static voidngx_http_test_body_handler(ngx_http_request_t *r) {    ngx_buf_t  *b;    ngx_int_t   rc;    ngx_chain_t out, body;r->headers_out.status = NGX_HTTP_OK;//r->headers_out.content_length_n = data.len;r->headers_out.content_type.data = (u_char *) "text/html";r->headers_out.content_type.len = sizeof("text/html") - 1;if (r->method & NGX_HTTP_HEAD) {    rc = ngx_http_send_header(r);/*if (NGX_OK != rc) {    return rc;}*/return;}b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));if (NULL == b) {    return;// NGX_HTTP_INTERNAL_SERVER_ERROR;}b->pos = data.data;b->last = data.data + data.len;b->last_buf = 1;b->memory = 1;out.buf = b;out.next = NULL;body.buf = r->request_body->bufs->buf;body.next = &out;r->headers_out.content_length_n = body.buf->last - body.buf->pos + data.len;rc = ngx_http_send_header(r);if (NGX_OK != rc) {    return;// rc;}/*return */ngx_http_output_filter(r, &body/*&out*/);}

用curl测试：

curl -X POST -H "charset:gb2312" -d "content=因为登陆服务升级，密码策略变更，以前的试脚本中的用户密码已经不能登陆&number=1" http://192.168.0.246:80/test/

返回：（nginx.\r\nhello world!是在原内容末尾顺便加上的。）

content=因为登陆服务升级，密码策略变更，以前的试脚本中的用户密码已经不能登陆&number=1nginx.hello world!

这里有篇文章对request_body的原理作详细说明的文章：

http://chenzhenianqing.cn/articles/764.html

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