nginx/src/http/ngx_http_special_response.c

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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
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#include <nginx.h>
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static char error_tail[] =
"<hr><center>" NGINX_VER "</center>" CRLF
"</body>" CRLF
"</html>" CRLF
;
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static char msie_stub[] =
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
;
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static char error_302_page[] =
"<html>" CRLF
"<head><title>302 Found</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>302 Found</h1></center>" CRLF
;
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static char error_400_page[] =
"<html>" CRLF
"<head><title>400 Bad Request</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>400 Bad Request</h1></center>" CRLF
;
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static char error_403_page[] =
"<html>" CRLF
"<head><title>403 Forbidden</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>403 Forbidden</h1></center>" CRLF
;
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static char error_404_page[] =
"<html>" CRLF
"<head><title>404 Not Found</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>404 Not Found</h1></center>" CRLF
;
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static char error_405_page[] =
"<html>" CRLF
"<head><title>405 Not Allowed</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>405 Not Allowed</h1></center>" CRLF
;
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static char error_408_page[] =
"<html>" CRLF
"<head><title>408 Request Time-out</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>408 Request Time-out</h1></center>" CRLF
;
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static char error_414_page[] =
"<html>" CRLF
"<head><title>414 Request-URI Too Large</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>414 Request-URI Too Large</h1></center>" CRLF
;
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static char error_416_page[] =
"<html>" CRLF
"<head><title>416 Requested Range Not Satisfiable</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>416 Requested Range Not Satisfiable</h1></center>" CRLF
;
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static char error_500_page[] =
"<html>" CRLF
"<head><title>500 Internal Server Error</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>500 Internal Server Error</h1></center>" CRLF
;
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static char error_502_page[] =
"<html>" CRLF
"<head><title>502 Bad Gateway</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>502 Bad Gateway</h1></center>" CRLF
;
static char error_504_page[] =
"<html>" CRLF
"<head><title>504 Gateway Time-out</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>504 Gateway Time-out</h1></center>" CRLF
;
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static ngx_str_t error_pages[] = {
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ngx_null_string, /* 300 */
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ngx_null_string, /* 301 */
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ngx_string(error_302_page),
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ngx_null_string, /* 303 */
ngx_string(error_400_page),
ngx_null_string, /* 401 */
ngx_null_string, /* 402 */
ngx_string(error_403_page),
ngx_string(error_404_page),
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ngx_string(error_405_page),
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ngx_null_string, /* 406 */
ngx_null_string, /* 407 */
ngx_string(error_408_page),
ngx_null_string, /* 409 */
ngx_null_string, /* 410 */
ngx_null_string, /* 411 */
ngx_null_string, /* 412 */
ngx_null_string, /* 413 */
ngx_string(error_414_page),
ngx_null_string, /* 415 */
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ngx_string(error_416_page),
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ngx_string(error_500_page),
ngx_null_string, /* 501 */
ngx_string(error_502_page),
ngx_null_string, /* 503 */
ngx_string(error_504_page)
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};
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int ngx_http_special_response_handler(ngx_http_request_t *r, int error)
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{
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int err, rc;
ngx_hunk_t *h;
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r->headers_out.status = error;
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if (error < NGX_HTTP_BAD_REQUEST) {
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/* 3XX */
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err = error - NGX_HTTP_MOVED_PERMANENTLY;
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} else if (error < NGX_HTTP_INTERNAL_SERVER_ERROR) {
/* 4XX */
err = error - NGX_HTTP_BAD_REQUEST + 4;
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} else {
/* 5XX */
err = error - NGX_HTTP_INTERNAL_SERVER_ERROR + 4 + 17;
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}
if (r->keepalive != 0) {
switch (error) {
case NGX_HTTP_BAD_REQUEST:
case NGX_HTTP_REQUEST_URI_TOO_LARGE:
case NGX_HTTP_INTERNAL_SERVER_ERROR:
r->keepalive = 0;
}
}
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if (r->lingering_close == 1) {
switch (error) {
case NGX_HTTP_BAD_REQUEST:
case NGX_HTTP_REQUEST_URI_TOO_LARGE:
case NGX_HTTP_INTERNAL_SERVER_ERROR:
r->lingering_close = 0;
}
}
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if (error_pages[err].len) {
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r->headers_out.content_length = error_pages[err].len
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+ sizeof(error_tail) - 1
+ sizeof(msie_stub) - 1;
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ngx_test_null(r->headers_out.content_type,
ngx_push_table(r->headers_out.headers),
NGX_HTTP_INTERNAL_SERVER_ERROR);
r->headers_out.content_type->key.len = 12;
r->headers_out.content_type->key.data = "Content-Type";
r->headers_out.content_type->value.len = 9;
r->headers_out.content_type->value.data = "text/html";
} else {
r->headers_out.content_length = -1;
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}
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rc = ngx_http_send_header(r);
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if (rc == NGX_ERROR || r->header_only) {
return rc;
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}
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if (error_pages[err].len == 0) {
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return NGX_OK;
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}
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ngx_test_null(h, ngx_calloc_hunk(r->pool), NGX_ERROR);
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h->type = NGX_HUNK_MEMORY|NGX_HUNK_IN_MEMORY;
h->pos = error_pages[err].data;
h->last = error_pages[err].data + error_pages[err].len;
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if (ngx_http_output_filter(r, h) == NGX_ERROR) {
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return NGX_ERROR;
}
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ngx_test_null(h, ngx_calloc_hunk(r->pool), NGX_ERROR);
h->type = NGX_HUNK_MEMORY|NGX_HUNK_IN_MEMORY;
h->pos = error_tail;
h->last = error_tail + sizeof(error_tail) - 1;
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if (/* STUB: "msie_padding on/off" */ 1) {
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if (ngx_http_output_filter(r, h) == NGX_ERROR) {
return NGX_ERROR;
}
ngx_test_null(h, ngx_calloc_hunk(r->pool), NGX_ERROR);
h->type = NGX_HUNK_MEMORY|NGX_HUNK_IN_MEMORY;
h->pos = msie_stub;
h->last = msie_stub + sizeof(msie_stub) - 1;
}
h->type |= NGX_HUNK_LAST;
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return ngx_http_output_filter(r, h);
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}