| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_http.h> |
| #include <nginx.h> |
| |
| |
| static u_char error_tail[] = |
| "<hr><center>" NGINX_VER "</center>" CRLF |
| "</body>" CRLF |
| "</html>" CRLF |
| ; |
| |
| |
| static u_char ngx_http_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 |
| ; |
| |
| |
| static char error_301_page[] = |
| "<html>" CRLF |
| "<head><title>301 Moved Permanently</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>301 Moved Permanently</h1></center>" CRLF |
| ; |
| |
| |
| 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 |
| ; |
| |
| |
| 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 |
| ; |
| |
| |
| static char error_401_page[] = |
| "<html>" CRLF |
| "<head><title>401 Authorization Required</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>401 Authorization Required</h1></center>" CRLF |
| ; |
| |
| |
| static char error_402_page[] = |
| "<html>" CRLF |
| "<head><title>402 Payment Required</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>402 Payment Required</h1></center>" CRLF |
| ; |
| |
| |
| 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 |
| ; |
| |
| |
| 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 |
| ; |
| |
| |
| 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 |
| ; |
| |
| |
| static char error_406_page[] = |
| "<html>" CRLF |
| "<head><title>406 Not Acceptable</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>406 Not Acceptable</h1></center>" CRLF |
| ; |
| |
| |
| 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 |
| ; |
| |
| |
| static char error_410_page[] = |
| "<html>" CRLF |
| "<head><title>410 Gone</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>410 Gone</h1></center>" CRLF |
| ; |
| |
| |
| static char error_413_page[] = |
| "<html>" CRLF |
| "<head><title>413 Request Entity Too Large</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>413 Request Entity Too Large</h1></center>" CRLF |
| ; |
| |
| |
| 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 |
| ; |
| |
| |
| 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 |
| ; |
| |
| |
| static char error_497_page[] = |
| "<html>" CRLF |
| "<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>" |
| CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>400 Bad Request</h1></center>" CRLF |
| "<center>The plain HTTP request was sent to HTTPS port</center>" CRLF |
| ; |
| |
| |
| 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 |
| ; |
| |
| |
| static char error_501_page[] = |
| "<html>" CRLF |
| "<head><title>501 Method Not Implemented</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>501 Method Not Implemented</h1></center>" CRLF |
| ; |
| |
| |
| 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_503_page[] = |
| "<html>" CRLF |
| "<head><title>503 Service Temporarily Unavailable</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>503 Service Temporarily Unavailable</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 |
| ; |
| |
| |
| static ngx_str_t error_pages[] = { |
| |
| ngx_null_string, /* 204 */ |
| |
| #define NGX_HTTP_LEVEL_200 1 |
| |
| /* ngx_null_string, */ /* 300 */ |
| ngx_string(error_301_page), |
| ngx_string(error_302_page), |
| ngx_null_string, /* 303 */ |
| |
| #define NGX_HTTP_LEVEL_300 3 |
| |
| ngx_string(error_400_page), |
| ngx_string(error_401_page), |
| ngx_string(error_402_page), |
| ngx_string(error_403_page), |
| ngx_string(error_404_page), |
| ngx_string(error_405_page), |
| ngx_string(error_406_page), |
| ngx_null_string, /* 407 */ |
| ngx_string(error_408_page), |
| ngx_null_string, /* 409 */ |
| ngx_string(error_410_page), |
| ngx_null_string, /* 411 */ |
| ngx_null_string, /* 412 */ |
| ngx_string(error_413_page), |
| ngx_string(error_414_page), |
| ngx_null_string, /* 415 */ |
| ngx_string(error_416_page), |
| |
| #define NGX_HTTP_LEVEL_400 17 |
| |
| ngx_string(error_497_page), /* 497, http to https */ |
| ngx_string(error_404_page), /* 498, invalid host name */ |
| ngx_null_string, /* 499, client had closed connection */ |
| |
| ngx_string(error_500_page), |
| ngx_string(error_501_page), |
| ngx_string(error_502_page), |
| ngx_string(error_503_page), |
| ngx_string(error_504_page) |
| }; |
| |
| |
| ngx_int_t |
| ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error) |
| { |
| ngx_int_t rc; |
| ngx_uint_t i, err, msie_padding; |
| ngx_buf_t *b; |
| ngx_chain_t *out, *cl; |
| ngx_http_err_page_t *err_page; |
| ngx_http_core_loc_conf_t *clcf; |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "http special response: %d, \"%V\"", error, &r->uri); |
| |
| rc = ngx_http_discard_body(r); |
| |
| if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) { |
| error = NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| r->headers_out.status = error; |
| |
| if (r->keepalive != 0) { |
| switch (error) { |
| case NGX_HTTP_BAD_REQUEST: |
| case NGX_HTTP_REQUEST_ENTITY_TOO_LARGE: |
| case NGX_HTTP_REQUEST_URI_TOO_LARGE: |
| case NGX_HTTP_TO_HTTPS: |
| case NGX_HTTP_INTERNAL_SERVER_ERROR: |
| r->keepalive = 0; |
| } |
| } |
| |
| if (r->lingering_close == 1) { |
| switch (error) { |
| case NGX_HTTP_BAD_REQUEST: |
| case NGX_HTTP_TO_HTTPS: |
| r->lingering_close = 0; |
| } |
| } |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| if (r->err_ctx == NULL && clcf->error_pages) { |
| |
| err_page = clcf->error_pages->elts; |
| |
| for (i = 0; i < clcf->error_pages->nelts; i++) { |
| |
| if (err_page[i].status == error) { |
| r->err_status = err_page[i].overwrite; |
| r->err_ctx = r->ctx; |
| |
| r->method = NGX_HTTP_GET; |
| |
| if (err_page[i].uri.data[0] == '/') { |
| return ngx_http_internal_redirect(r, &err_page[i].uri, |
| NULL); |
| } |
| |
| r->headers_out.location = |
| ngx_list_push(&r->headers_out.headers); |
| |
| if (r->headers_out.location) { |
| r->err_status = NGX_HTTP_MOVED_TEMPORARILY; |
| error = NGX_HTTP_MOVED_TEMPORARILY; |
| |
| r->headers_out.location->hash = 1; |
| r->headers_out.location->key.len = sizeof("Location") - 1; |
| r->headers_out.location->key.data = (u_char *) "Location"; |
| r->headers_out.location->value = err_page[i].uri; |
| |
| } else { |
| error = NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| } |
| } |
| } |
| |
| if (error == NGX_HTTP_NO_CONTENT) { |
| /* 204 */ |
| err = 0; |
| |
| } else if (error < NGX_HTTP_BAD_REQUEST) { |
| /* 3XX */ |
| err = error - NGX_HTTP_MOVED_PERMANENTLY + NGX_HTTP_LEVEL_200; |
| |
| } else if (error < NGX_HTTP_NGX_CODES) { |
| /* 4XX */ |
| err = error - NGX_HTTP_BAD_REQUEST + NGX_HTTP_LEVEL_200 |
| + NGX_HTTP_LEVEL_300; |
| |
| } else { |
| /* 49X, 5XX */ |
| err = error - NGX_HTTP_NGX_CODES + NGX_HTTP_LEVEL_200 |
| + NGX_HTTP_LEVEL_300 |
| + NGX_HTTP_LEVEL_400; |
| switch (error) { |
| case NGX_HTTP_TO_HTTPS: |
| r->headers_out.status = NGX_HTTP_BAD_REQUEST; |
| error = NGX_HTTP_BAD_REQUEST; |
| break; |
| |
| case NGX_HTTP_INVALID_HOST: |
| r->headers_out.status = NGX_HTTP_NOT_FOUND; |
| error = NGX_HTTP_NOT_FOUND; |
| break; |
| } |
| } |
| |
| msie_padding = 0; |
| |
| if (error_pages[err].len) { |
| r->headers_out.content_length_n = error_pages[err].len |
| + sizeof(error_tail) - 1; |
| |
| if (clcf->msie_padding |
| && r->headers_in.msie |
| && r->http_version >= NGX_HTTP_VERSION_10 |
| && error >= NGX_HTTP_BAD_REQUEST |
| && error != NGX_HTTP_REQUEST_URI_TOO_LARGE) |
| { |
| r->headers_out.content_length_n += sizeof(ngx_http_msie_stub) - 1; |
| msie_padding = 1; |
| } |
| |
| r->headers_out.content_type.len = sizeof("text/html") - 1; |
| r->headers_out.content_type.data = (u_char *) "text/html"; |
| |
| } else { |
| r->headers_out.content_length_n = -1; |
| } |
| |
| if (r->headers_out.content_length) { |
| r->headers_out.content_length->hash = 0; |
| r->headers_out.content_length = NULL; |
| } |
| |
| ngx_http_clear_accept_ranges(r); |
| ngx_http_clear_last_modified(r); |
| |
| rc = ngx_http_send_header(r); |
| |
| if (rc == NGX_ERROR || r->header_only) { |
| return rc; |
| } |
| |
| if (error_pages[err].len == 0) { |
| return NGX_OK; |
| } |
| |
| |
| b = ngx_calloc_buf(r->pool); |
| if (b == NULL) { |
| return NGX_ERROR; |
| } |
| |
| b->memory = 1; |
| b->pos = error_pages[err].data; |
| b->last = error_pages[err].data + error_pages[err].len; |
| |
| cl = ngx_alloc_chain_link(r->pool); |
| if (cl == NULL) { |
| return NGX_ERROR; |
| } |
| |
| cl->buf = b; |
| out = cl; |
| |
| |
| b = ngx_calloc_buf(r->pool); |
| if (b == NULL) { |
| return NGX_ERROR; |
| } |
| |
| b->memory = 1; |
| b->pos = error_tail; |
| b->last = error_tail + sizeof(error_tail) - 1; |
| |
| cl->next = ngx_alloc_chain_link(r->pool); |
| if (cl->next == NULL) { |
| return NGX_ERROR; |
| } |
| |
| cl = cl->next; |
| cl->buf = b; |
| |
| if (msie_padding) { |
| b = ngx_calloc_buf(r->pool); |
| if (b == NULL) { |
| return NGX_ERROR; |
| } |
| |
| b->memory = 1; |
| b->pos = ngx_http_msie_stub; |
| b->last = ngx_http_msie_stub + sizeof(ngx_http_msie_stub) - 1; |
| |
| cl->next = ngx_alloc_chain_link(r->pool); |
| if (cl->next == NULL) { |
| return NGX_ERROR; |
| } |
| |
| cl = cl->next; |
| cl->buf = b; |
| } |
| |
| if (r->main == r) { |
| b->last_buf = 1; |
| } |
| |
| b->last_in_chain = 1; |
| |
| cl->next = NULL; |
| |
| return ngx_http_output_filter(r, out); |
| } |
