view src/http/modules/ngx_http_flv_module.c @ 6785:d1d0dd69a419

Upstream: added the ngx_http_upstream_resolved_t.name field. This fixes inconsistency in what is stored in the "host" field. Normally it would contain the "host" part of the parsed URL (e.g., proxy_pass with variables), but for the case of an implicit upstream specified with literal address it contained the text representation of the socket address (that is, host including port for IP). Now the "host" field always contains the "host" part of the URL, while the text representation of the socket address is stored in the newly added "name" field. The ngx_http_upstream_create_round_robin_peer() function was modified accordingly in a way to be compatible with the code that does not know about the new "name" field. The "stream" code was similarly modified except for not adding compatibility in ngx_stream_upstream_create_round_robin_peer(). This change is also a prerequisite for the next change.
author Ruslan Ermilov <ru@nginx.com>
date Mon, 31 Oct 2016 18:33:33 +0300
parents 192f54280a7a
children 99934aade555
line wrap: on
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */

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


static char *ngx_http_flv(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);

static ngx_command_t  ngx_http_flv_commands[] = {

    { ngx_string("flv"),
      NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,
      ngx_http_flv,
      0,
      0,
      NULL },

      ngx_null_command
};


static u_char  ngx_flv_header[] = "FLV\x1\x5\0\0\0\x9\0\0\0\0";


static ngx_http_module_t  ngx_http_flv_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_flv_module = {
    NGX_MODULE_V1,
    &ngx_http_flv_module_ctx,      /* module context */
    ngx_http_flv_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_int_t
ngx_http_flv_handler(ngx_http_request_t *r)
{
    u_char                    *last;
    off_t                      start, len;
    size_t                     root;
    ngx_int_t                  rc;
    ngx_uint_t                 level, i;
    ngx_str_t                  path, value;
    ngx_log_t                 *log;
    ngx_buf_t                 *b;
    ngx_chain_t                out[2];
    ngx_open_file_info_t       of;
    ngx_http_core_loc_conf_t  *clcf;

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

    if (r->uri.data[r->uri.len - 1] == '/') {
        return NGX_DECLINED;
    }

    rc = ngx_http_discard_request_body(r);

    if (rc != NGX_OK) {
        return rc;
    }

    last = ngx_http_map_uri_to_path(r, &path, &root, 0);
    if (last == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    log = r->connection->log;

    path.len = last - path.data;

    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
                   "http flv filename: \"%V\"", &path);

    clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);

    ngx_memzero(&of, sizeof(ngx_open_file_info_t));

    of.read_ahead = clcf->read_ahead;
    of.directio = clcf->directio;
    of.valid = clcf->open_file_cache_valid;
    of.min_uses = clcf->open_file_cache_min_uses;
    of.errors = clcf->open_file_cache_errors;
    of.events = clcf->open_file_cache_events;

    if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
        != NGX_OK)
    {
        switch (of.err) {

        case 0:
            return NGX_HTTP_INTERNAL_SERVER_ERROR;

        case NGX_ENOENT:
        case NGX_ENOTDIR:
        case NGX_ENAMETOOLONG:

            level = NGX_LOG_ERR;
            rc = NGX_HTTP_NOT_FOUND;
            break;

        case NGX_EACCES:
#if (NGX_HAVE_OPENAT)
        case NGX_EMLINK:
        case NGX_ELOOP:
#endif

            level = NGX_LOG_ERR;
            rc = NGX_HTTP_FORBIDDEN;
            break;

        default:

            level = NGX_LOG_CRIT;
            rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
            break;
        }

        if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
            ngx_log_error(level, log, of.err,
                          "%s \"%s\" failed", of.failed, path.data);
        }

        return rc;
    }

    if (!of.is_file) {

        if (ngx_close_file(of.fd) == NGX_FILE_ERROR) {
            ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
                          ngx_close_file_n " \"%s\" failed", path.data);
        }

        return NGX_DECLINED;
    }

    r->root_tested = !r->error_page;

    start = 0;
    len = of.size;
    i = 1;

    if (r->args.len) {

        if (ngx_http_arg(r, (u_char *) "start", 5, &value) == NGX_OK) {

            start = ngx_atoof(value.data, value.len);

            if (start == NGX_ERROR || start >= len) {
                start = 0;
            }

            if (start) {
                len = sizeof(ngx_flv_header) - 1 + len - start;
                i = 0;
            }
        }
    }

    log->action = "sending flv to client";

    r->headers_out.status = NGX_HTTP_OK;
    r->headers_out.content_length_n = len;
    r->headers_out.last_modified_time = of.mtime;

    if (ngx_http_set_etag(r) != NGX_OK) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    if (ngx_http_set_content_type(r) != NGX_OK) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    if (i == 0) {
        b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
        if (b == NULL) {
            return NGX_HTTP_INTERNAL_SERVER_ERROR;
        }

        b->pos = ngx_flv_header;
        b->last = ngx_flv_header + sizeof(ngx_flv_header) - 1;
        b->memory = 1;

        out[0].buf = b;
        out[0].next = &out[1];
    }


    b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
    if (b == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
    if (b->file == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    r->allow_ranges = 1;

    rc = ngx_http_send_header(r);

    if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
        return rc;
    }

    b->file_pos = start;
    b->file_last = of.size;

    b->in_file = b->file_last ? 1: 0;
    b->last_buf = (r == r->main) ? 1 : 0;
    b->last_in_chain = 1;

    b->file->fd = of.fd;
    b->file->name = path;
    b->file->log = log;
    b->file->directio = of.is_directio;

    out[1].buf = b;
    out[1].next = NULL;

    return ngx_http_output_filter(r, &out[i]);
}


static char *
ngx_http_flv(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_flv_handler;

    return NGX_CONF_OK;
}