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diff src/http/ngx_http_special_response.c-C @ 230:38e7b94d63ac NGINX_0_4_0

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nginx 0.4.0 *) Change in internal API: the HTTP modules initialization was moved from the init module phase to the HTTP postconfiguration phase. *) Change: now the request body is not read beforehand for the ngx_http_perl_module: it's required to start the reading using the $r->has_request_body method. *) Feature: the ngx_http_perl_module supports the DECLINED return code. *) Feature: the ngx_http_dav_module supports the incoming "Date" header line for the PUT method. *) Feature: the "ssi" directive is available inside the "if" block. *) Bugfix: a segmentation fault occurred if there was an "index" directive with variables and the first index name was without variables; bug appeared in 0.1.29.
author Igor Sysoev <http://sysoev.ru>
date Wed, 30 Aug 2006 00:00:00 +0400
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+++ b/src/http/ngx_http_special_response.c-C
@@ -0,0 +1,548 @@
+
+/*
+ * 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_409_page[] =
+"<html>" CRLF
+"<head><title>409 Conflict</title></head>" CRLF
+"<body bgcolor=\"white\">" CRLF
+"<center><h1>409 Conflict</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_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 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_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 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_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 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 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 char 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 error_pages[] = {
+
+    ngx_null_string,             /* 201, 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_string(error_409_page),
+    ngx_string(error_410_page),
+    ngx_string(error_411_page),
+    ngx_null_string,             /* 412 */
+    ngx_string(error_413_page),
+    ngx_string(error_414_page),
+    ngx_string(error_415_page),
+    ngx_string(error_416_page),
+
+#define NGX_HTTP_LEVEL_400  17
+
+    ngx_string(error_495_page),  /* 495, https certificate error */
+    ngx_string(error_496_page),  /* 496, https no certificate */
+    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_null_string,             /* 505 */
+    ngx_null_string,             /* 506 */
+    ngx_string(error_507_page)
+};
+
+
+ngx_int_t
+ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error)
+{
+    ngx_int_t                  rc;
+    ngx_buf_t                 *b;
+    ngx_str_t                 *uri;
+    ngx_uint_t                 i, n, err, msie_padding;
+    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;
+    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) {
+                r->err_status = err_page[i].overwrite;
+
+                r->method = NGX_HTTP_GET;
+
+                uri = &err_page[i].uri;
+
+                if (err_page[i].uri_lengths) {
+                    if (ngx_http_script_run(r, uri,
+                                            err_page[i].uri_lengths->elts, 0,
+                                            err_page[i].uri_values->elts)
+                        == NULL)
+                    {
+                        return NGX_ERROR;
+                    }
+
+                    if (r->zero_in_uri) {
+                        for (n = 0; n < uri->len; n++) {
+                            if (uri->data[n] == '\0') {
+                                goto zero;
+                            }
+                        }
+
+                        r->zero_in_uri = 0;
+                    }
+
+                } else {
+                    r->zero_in_uri = 0;
+                }
+
+            zero:
+
+                if (uri->data[0] == '/') {
+                    return ngx_http_internal_redirect(r, uri, NULL);
+                }
+
+                r->headers_out.location =
+                                        ngx_list_push(&r->headers_out.headers);
+
+                if (r->headers_out.location) {
+                    error = NGX_HTTP_MOVED_TEMPORARILY;
+
+                    r->err_status = 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 = *uri;
+
+                } else {
+                    return NGX_ERROR;
+                }
+            }
+        }
+    }
+
+    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->headers_out.status = NGX_HTTP_BAD_REQUEST;
+                error = NGX_HTTP_BAD_REQUEST;
+                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 == r->main) {
+        b->last_buf = 1;
+    }
+
+    b->last_in_chain = 1;
+
+    cl->next = NULL;
+
+    return ngx_http_output_filter(r, out);
+}