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Viewing changes to src/http/modules/ngx_http_not_modified_filter_module.c

  • Committer: Michael Lustfield
  • Date: 2010-12-08 05:46:19 UTC
  • Revision ID: michael@profarius.com-20101208054619-q0l7ak00atomn5z4
Tags: 0.9.2
Version 0.9.2

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src/http/modules/ngx_http_not_modified_filter_module.c
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#include <ngx_http.h>
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static ngx_int_t ngx_http_test_precondition(ngx_http_request_t *r);
 
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static ngx_int_t ngx_http_test_not_modified(ngx_http_request_t *r);
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static ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf);
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static ngx_int_t
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ngx_http_not_modified_header_filter(ngx_http_request_t *r)
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{
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    time_t                     ims;
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    ngx_http_core_loc_conf_t  *clcf;
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    if (r->headers_out.status != NGX_HTTP_OK
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        || r != r->main
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        || r->headers_in.if_modified_since == NULL
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        || r->headers_out.last_modified_time == -1)
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    {
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        return ngx_http_next_header_filter(r);
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    }
 
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    if (r->headers_in.if_unmodified_since) {
 
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        return ngx_http_test_precondition(r);
 
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    }
 
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    if (r->headers_in.if_modified_since) {
 
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        return ngx_http_test_not_modified(r);
 
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    }
 
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    return ngx_http_next_header_filter(r);
 
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}
 
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static ngx_int_t
 
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ngx_http_test_precondition(ngx_http_request_t *r)
 
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{
 
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    time_t  iums;
 
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    iums = ngx_http_parse_time(r->headers_in.if_unmodified_since->value.data,
 
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                               r->headers_in.if_unmodified_since->value.len);
 
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    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
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                 "http iums:%d lm:%d", iums, r->headers_out.last_modified_time);
 
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    if (iums >= r->headers_out.last_modified_time) {
 
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        return ngx_http_next_header_filter(r);
 
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    }
 
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    return ngx_http_filter_finalize_request(r, NULL,
 
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                                            NGX_HTTP_PRECONDITION_FAILED);
 
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}
 
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static ngx_int_t
 
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ngx_http_test_not_modified(ngx_http_request_t *r)
 
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{
 
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    time_t                     ims;
 
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    ngx_http_core_loc_conf_t  *clcf;
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    clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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