| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_http.h> |
| #include <nginx.h> |
| |
| |
| static ngx_int_t ngx_http_send_error_page(ngx_http_request_t *r, |
| ngx_http_err_page_t *err_page); |
| static ngx_int_t ngx_http_send_special_response(ngx_http_request_t *r, |
| ngx_http_core_loc_conf_t *clcf, ngx_uint_t err); |
| static ngx_int_t ngx_http_send_refresh(ngx_http_request_t *r); |
| |
| |
| static u_char ngx_http_error_full_tail[] = |
| "<hr><center>" NGINX_VER "</center>" CRLF |
| "</body>" CRLF |
| "</html>" CRLF |
| ; |
| |
| |
| static u_char ngx_http_error_tail[] = |
| "<hr><center>nginx</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 u_char ngx_http_msie_refresh_head[] = |
| "<html><head><meta http-equiv=\"Refresh\" content=\"0; URL="; |
| |
| |
| static u_char ngx_http_msie_refresh_tail[] = |
| "\"></head><body></body></html>" CRLF; |
| |
| |
| static char ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_error_409_page[] = |
| "<html>" CRLF |
| "<head><title>409 Conflict</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>409 Conflict</h1></center>" CRLF |
| ; |
| |
| |
| static char ngx_http_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 ngx_http_error_411_page[] = |
| "<html>" CRLF |
| "<head><title>411 Length Required</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>411 Length Required</h1></center>" CRLF |
| ; |
| |
| |
| static char ngx_http_error_412_page[] = |
| "<html>" CRLF |
| "<head><title>412 Precondition Failed</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>412 Precondition Failed</h1></center>" CRLF |
| ; |
| |
| |
| static char ngx_http_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 ngx_http_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 ngx_http_error_415_page[] = |
| "<html>" CRLF |
| "<head><title>415 Unsupported Media Type</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>415 Unsupported Media Type</h1></center>" CRLF |
| ; |
| |
| |
| static char ngx_http_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 ngx_http_error_495_page[] = |
| "<html>" CRLF |
| "<head><title>400 The SSL certificate error</title></head>" |
| CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>400 Bad Request</h1></center>" CRLF |
| "<center>The SSL certificate error</center>" CRLF |
| ; |
| |
| |
| static char ngx_http_error_496_page[] = |
| "<html>" CRLF |
| "<head><title>400 No required SSL certificate was sent</title></head>" |
| CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>400 Bad Request</h1></center>" CRLF |
| "<center>No required SSL certificate was sent</center>" CRLF |
| ; |
| |
| |
| static char ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_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 ngx_http_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 char ngx_http_error_507_page[] = |
| "<html>" CRLF |
| "<head><title>507 Insufficient Storage</title></head>" CRLF |
| "<body bgcolor=\"white\">" CRLF |
| "<center><h1>507 Insufficient Storage</h1></center>" CRLF |
| ; |
| |
| |
| static ngx_str_t ngx_http_error_pages[] = { |
| |
| ngx_null_string, /* 201, 204 */ |
| |
| #define NGX_HTTP_LEVEL_200 1 |
| |
| /* ngx_null_string, */ /* 300 */ |
| ngx_string(ngx_http_error_301_page), |
| ngx_string(ngx_http_error_302_page), |
| ngx_null_string, /* 303 */ |
| |
| #define NGX_HTTP_LEVEL_300 3 |
| |
| ngx_string(ngx_http_error_400_page), |
| ngx_string(ngx_http_error_401_page), |
| ngx_string(ngx_http_error_402_page), |
| ngx_string(ngx_http_error_403_page), |
| ngx_string(ngx_http_error_404_page), |
| ngx_string(ngx_http_error_405_page), |
| ngx_string(ngx_http_error_406_page), |
| ngx_null_string, /* 407 */ |
| ngx_string(ngx_http_error_408_page), |
| ngx_string(ngx_http_error_409_page), |
| ngx_string(ngx_http_error_410_page), |
| ngx_string(ngx_http_error_411_page), |
| ngx_string(ngx_http_error_412_page), |
| ngx_string(ngx_http_error_413_page), |
| ngx_string(ngx_http_error_414_page), |
| ngx_string(ngx_http_error_415_page), |
| ngx_string(ngx_http_error_416_page), |
| |
| #define NGX_HTTP_LEVEL_400 17 |
| |
| ngx_string(ngx_http_error_495_page), /* 495, https certificate error */ |
| ngx_string(ngx_http_error_496_page), /* 496, https no certificate */ |
| ngx_string(ngx_http_error_497_page), /* 497, http to https */ |
| ngx_string(ngx_http_error_404_page), /* 498, canceled */ |
| ngx_null_string, /* 499, client has closed connection */ |
| |
| ngx_string(ngx_http_error_500_page), |
| ngx_string(ngx_http_error_501_page), |
| ngx_string(ngx_http_error_502_page), |
| ngx_string(ngx_http_error_503_page), |
| ngx_string(ngx_http_error_504_page), |
| ngx_null_string, /* 505 */ |
| ngx_null_string, /* 506 */ |
| ngx_string(ngx_http_error_507_page) |
| }; |
| |
| |
| static ngx_str_t ngx_http_get_name = { 3, (u_char *) "GET " }; |
| |
| |
| 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; |
| 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_request_body(r); |
| |
| if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) { |
| error = NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| r->err_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_HTTPS_CERT_ERROR: |
| case NGX_HTTPS_NO_CERT: |
| 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: |
| case NGX_HTTPS_CERT_ERROR: |
| case NGX_HTTPS_NO_CERT: |
| r->lingering_close = 0; |
| } |
| } |
| |
| r->headers_out.content_type.len = 0; |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| if (!r->error_page && clcf->error_pages) { |
| |
| if (clcf->recursive_error_pages == 0) { |
| r->error_page = 1; |
| } |
| |
| err_page = clcf->error_pages->elts; |
| |
| for (i = 0; i < clcf->error_pages->nelts; i++) { |
| if (err_page[i].status == error) { |
| return ngx_http_send_error_page(r, &err_page[i]); |
| } |
| } |
| } |
| |
| if (clcf->msie_refresh |
| && r->headers_in.msie |
| && (error == NGX_HTTP_MOVED_PERMANENTLY |
| || error == NGX_HTTP_MOVED_TEMPORARILY)) |
| { |
| return ngx_http_send_refresh(r); |
| } |
| |
| if (error == NGX_HTTP_CREATED) { |
| /* 201 */ |
| err = 0; |
| r->header_only = 1; |
| |
| } else 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_OWN_CODES) { |
| /* 4XX */ |
| err = error - NGX_HTTP_BAD_REQUEST + NGX_HTTP_LEVEL_200 |
| + NGX_HTTP_LEVEL_300; |
| |
| } else { |
| /* 49X, 5XX */ |
| err = error - NGX_HTTP_OWN_CODES + NGX_HTTP_LEVEL_200 |
| + NGX_HTTP_LEVEL_300 |
| + NGX_HTTP_LEVEL_400; |
| switch (error) { |
| case NGX_HTTP_TO_HTTPS: |
| case NGX_HTTPS_CERT_ERROR: |
| case NGX_HTTPS_NO_CERT: |
| r->err_status = NGX_HTTP_BAD_REQUEST; |
| break; |
| } |
| } |
| |
| return ngx_http_send_special_response(r, clcf, err); |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_send_error_page(ngx_http_request_t *r, ngx_http_err_page_t *err_page) |
| { |
| u_char ch, *p, *last; |
| ngx_str_t *uri, *args, u, a; |
| ngx_table_elt_t *location; |
| ngx_http_core_loc_conf_t *clcf; |
| |
| r->err_status = err_page->overwrite; |
| |
| r->zero_in_uri = 0; |
| |
| args = NULL; |
| |
| if (err_page->uri_lengths) { |
| if (ngx_http_script_run(r, &u, err_page->uri_lengths->elts, 0, |
| err_page->uri_values->elts) |
| == NULL) |
| { |
| return NGX_ERROR; |
| } |
| |
| p = u.data; |
| uri = &u; |
| |
| if (*p == '/') { |
| |
| last = p + uri->len; |
| |
| while (p < last) { |
| |
| ch = *p++; |
| |
| if (ch == '?') { |
| a.len = last - p; |
| a.data = p; |
| args = &a; |
| |
| u.len = p - 1 - u.data; |
| |
| while (p < last) { |
| if (*p++ == '\0') { |
| r->zero_in_uri = 1; |
| break; |
| } |
| } |
| |
| break; |
| } |
| |
| if (ch == '\0') { |
| r->zero_in_uri = 1; |
| continue; |
| } |
| } |
| } |
| |
| } else { |
| uri = &err_page->uri; |
| } |
| |
| if (uri->data[0] == '/') { |
| |
| r->method = NGX_HTTP_GET; |
| r->method_name = ngx_http_get_name; |
| |
| return ngx_http_internal_redirect(r, uri, args); |
| } |
| |
| if (uri->data[0] == '@') { |
| return ngx_http_named_location(r, uri); |
| } |
| |
| location = ngx_list_push(&r->headers_out.headers); |
| |
| if (location == NULL) { |
| return NGX_ERROR; |
| } |
| |
| r->err_status = NGX_HTTP_MOVED_TEMPORARILY; |
| |
| location->hash = 1; |
| location->key.len = sizeof("Location") - 1; |
| location->key.data = (u_char *) "Location"; |
| location->value = *uri; |
| |
| r->headers_out.location = location; |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| if (clcf->msie_refresh && r->headers_in.msie) { |
| return ngx_http_send_refresh(r); |
| } |
| |
| return ngx_http_send_special_response(r, clcf, NGX_HTTP_MOVED_TEMPORARILY |
| - NGX_HTTP_MOVED_PERMANENTLY |
| + NGX_HTTP_LEVEL_200); |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_send_special_response(ngx_http_request_t *r, |
| ngx_http_core_loc_conf_t *clcf, ngx_uint_t err) |
| { |
| u_char *tail; |
| size_t len; |
| ngx_int_t rc; |
| ngx_buf_t *b; |
| ngx_uint_t msie_padding; |
| ngx_chain_t out[3]; |
| |
| if (clcf->server_tokens) { |
| len = sizeof(ngx_http_error_full_tail) - 1; |
| tail = ngx_http_error_full_tail; |
| |
| } else { |
| len = sizeof(ngx_http_error_tail) - 1; |
| tail = ngx_http_error_tail; |
| } |
| |
| msie_padding = 0; |
| |
| if (!r->zero_body) { |
| if (ngx_http_error_pages[err].len) { |
| r->headers_out.content_length_n = ngx_http_error_pages[err].len |
| + len; |
| if (clcf->msie_padding |
| && r->headers_in.msie |
| && r->http_version >= NGX_HTTP_VERSION_10 |
| && err >= NGX_HTTP_LEVEL_300) |
| { |
| 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.len = sizeof("text/html") - 1; |
| r->headers_out.content_type.data = (u_char *) "text/html"; |
| |
| } else { |
| r->headers_out.content_length_n = -1; |
| } |
| |
| } else { |
| r->headers_out.content_length_n = 0; |
| err = 0; |
| } |
| |
| 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 (ngx_http_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 = ngx_http_error_pages[err].data; |
| b->last = ngx_http_error_pages[err].data + ngx_http_error_pages[err].len; |
| |
| out[0].buf = b; |
| out[0].next = &out[1]; |
| |
| b = ngx_calloc_buf(r->pool); |
| if (b == NULL) { |
| return NGX_ERROR; |
| } |
| |
| b->memory = 1; |
| |
| b->pos = tail; |
| b->last = tail + len; |
| |
| out[1].buf = b; |
| out[1].next = NULL;; |
| |
| 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; |
| |
| out[1].next = &out[2]; |
| out[2].buf = b; |
| out[2].next = NULL;; |
| } |
| |
| if (r == r->main) { |
| b->last_buf = 1; |
| } |
| |
| b->last_in_chain = 1; |
| |
| return ngx_http_output_filter(r, &out[0]); |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_send_refresh(ngx_http_request_t *r) |
| { |
| u_char *p, *location; |
| size_t len, size; |
| uintptr_t escape; |
| ngx_int_t rc; |
| ngx_buf_t *b; |
| ngx_chain_t out; |
| |
| len = r->headers_out.location->value.len; |
| location = r->headers_out.location->value.data; |
| |
| escape = 2 * ngx_escape_uri(NULL, location, len, NGX_ESCAPE_REFRESH); |
| |
| size = sizeof(ngx_http_msie_refresh_head) - 1 |
| + escape + len |
| + sizeof(ngx_http_msie_refresh_tail) - 1; |
| |
| r->err_status = NGX_HTTP_OK; |
| |
| r->headers_out.content_type_len = sizeof("text/html") - 1; |
| r->headers_out.content_type.len = sizeof("text/html") - 1; |
| r->headers_out.content_type.data = (u_char *) "text/html"; |
| |
| r->headers_out.location->hash = 0; |
| r->headers_out.location = NULL; |
| |
| r->headers_out.content_length_n = size; |
| |
| 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; |
| } |
| |
| b = ngx_create_temp_buf(r->pool, size); |
| if (b == NULL) { |
| return NGX_ERROR; |
| } |
| |
| p = ngx_cpymem(b->pos, ngx_http_msie_refresh_head, |
| sizeof(ngx_http_msie_refresh_head) - 1); |
| |
| if (escape == 0) { |
| p = ngx_cpymem(p, location, len); |
| |
| } else { |
| p = (u_char *) ngx_escape_uri(p, location, len, NGX_ESCAPE_REFRESH); |
| } |
| |
| b->last = ngx_cpymem(p, ngx_http_msie_refresh_tail, |
| sizeof(ngx_http_msie_refresh_tail) - 1); |
| |
| b->last_buf = 1; |
| b->last_in_chain = 1; |
| |
| out.buf = b; |
| out.next = NULL; |
| |
| return ngx_http_output_filter(r, &out); |
| } |
