Random timeout while using ngx_http_read_client_request_body

[vivek goel]

I am writing my own module to generate contents.
I am getting random time-outs with it.
What can be the issue ?

Following is the source code for my module


/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */

#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>

typedef struct {
    ngx_flag_t done : 1;
    ngx_flag_t waiting_more_body : 1;
} ngx_http_helloworld_ctx_t;


static char *ngx_http_helloworld(ngx_conf_t *cf, ngx_command_t *cmd,
        void *conf);
static void ngx_http_form_input_post_read(ngx_http_request_t *r);

static ngx_command_t ngx_http_helloworld_commands[] = {

    { ngx_string("helloworld"),
        NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF |
NGX_CONF_NOARGS,
        ngx_http_helloworld,
        0,
        0,
        NULL},

    ngx_null_command
};




//static u_char ngx_helloworld[] = "ABCD";


static ngx_http_module_t ngx_http_helloworld_module_ctx = {
    NULL, /* preconfiguration */
    NULL, /* postconfiguration */

    NULL, /* create main configuration */
    NULL, /* init main configuration */

    NULL, /* create server configuration */
    NULL, /* merge server configuration */

    NULL, /* create location configuration */
    NULL /* merge location configuration */
};


ngx_module_t ngx_http_helloworld_module = {
    NGX_MODULE_V1,
    &ngx_http_helloworld_module_ctx, /* module context */
    ngx_http_helloworld_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
};


static ngx_str_t ngx_http_gif_type = ngx_string("text/html");

static ngx_int_t
ngx_http_helloworld_handler(ngx_http_request_t *r) {
    ngx_http_complex_value_t cv;
    ngx_http_helloworld_ctx_t *ctx;



    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
            "http form_input rewrite phase handler");

    ctx = ngx_http_get_module_ctx(r, ngx_http_helloworld_module);

    if (ctx != NULL) {
        if (ctx->done) {
            ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                    "http form_input rewrite phase handler done");

            return NGX_DECLINED;
        }

        return NGX_DONE;
    }

    ctx = ngx_pcalloc(r->pool, sizeof (ngx_http_helloworld_ctx_t));
    if (ctx == NULL) {
        return NGX_ERROR;
    }

    /* set by ngx_pcalloc:
     *      ctx->done = 0;
     *      ctx->waiting_more_body = 0;
     */

    ngx_http_set_ctx(r, ctx, ngx_http_helloworld_module);





    if (!(r->method & (NGX_HTTP_GET | NGX_HTTP_POST))) {
        return NGX_HTTP_NOT_ALLOWED;
    }

    ngx_memzero(&cv, sizeof (ngx_http_complex_value_t));
    if (r->method == NGX_HTTP_POST) {
        ngx_int_t rc = ngx_http_read_client_request_body(r,
ngx_http_form_input_post_read);
        if (rc) {
        }
    }

    /*
          ngx_str_t b;
          ngx_str_set(&b,"/b");
          return ngx_http_internal_redirect(r, &b,NULL);
     */
    return ngx_http_send_response(r, NGX_HTTP_OK, &ngx_http_gif_type, &cv);
}

static char *
ngx_http_helloworld(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_helloworld_handler;

    return NGX_CONF_OK;
}

static void ngx_http_form_input_post_read(ngx_http_request_t *r) {
    ngx_http_helloworld_ctx_t *ctx;

    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
            "http form_input post read request body");

    r->read_event_handler = ngx_http_request_empty_handler;

    ctx = ngx_http_get_module_ctx(r, ngx_http_helloworld_module);
    if (ctx == NULL) {
        return;
    }
    ctx->done = 1;

#if defined(nginx_version) && nginx_version >= 8011

    r->main->count--;
#endif




    if (ctx->waiting_more_body) {
        ctx->waiting_more_body = 0;

        ngx_http_core_run_phases(r);
    }
}


regards
Vivek Goel
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