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Mini Shell
Mini Shell
/*
* Copyright (C) Igor Sysoev
* Copyright (C) 2007 Manlio Perillo (manlio.perillo@gmail.com)
* Copyright (c) 2010-2018 Phusion Holding B.V.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <nginx.h>
#include <ngx_http.h>
#include "ngx_http_passenger_module.h"
#include "ContentHandler.h"
#include "StaticContentHandler.h"
#include "Configuration.h"
#include "cxx_supportlib/Constants.h"
#include "cxx_supportlib/FileTools/PathManipCBindings.h"
#define NGX_HTTP_SCGI_PARSE_NO_HEADER 20
typedef enum {
FT_ERROR,
FT_FILE,
FT_DIRECTORY,
FT_OTHER
} FileType;
static ngx_int_t reinit_request(ngx_http_request_t *r);
static ngx_int_t process_status_line(ngx_http_request_t *r);
static ngx_int_t parse_status_line(ngx_http_request_t *r,
passenger_context_t *context);
static ngx_int_t process_header(ngx_http_request_t *r);
static void abort_request(ngx_http_request_t *r);
static void finalize_request(ngx_http_request_t *r, ngx_int_t rc);
static FileType
get_file_type(const u_char *filename, unsigned int throttle_rate) {
struct stat buf;
int ret;
ret = pp_cached_file_stat_perform(pp_stat_cache,
(const char *) filename,
&buf,
throttle_rate);
if (ret == 0) {
if (S_ISREG(buf.st_mode)) {
return FT_FILE;
} else if (S_ISDIR(buf.st_mode)) {
return FT_DIRECTORY;
} else {
return FT_OTHER;
}
} else {
return FT_ERROR;
}
}
static int
file_exists(const u_char *filename, unsigned int throttle_rate) {
return get_file_type(filename, throttle_rate) == FT_FILE;
}
static int
mapped_filename_equals(const u_char *filename, size_t filename_len, ngx_str_t *str)
{
return (str->len == filename_len &&
memcmp(str->data, filename, filename_len) == 0) ||
(str->len == filename_len - 1 &&
filename[filename_len - 1] == '/' &&
memcmp(str->data, filename, filename_len - 1) == 0);
}
/**
* Maps the URI for the given request to a page cache file, if possible.
*
* @return Whether the URI has been successfully mapped to a page cache file.
* @param r The corresponding request.
* @param public_dir The web application's 'public' directory.
* @param filename The filename that the URI normally maps to.
* @param filename_len The length of the <tt>filename</tt> string.
* @param root The size of the root path in <tt>filename</tt>.
* @param page_cache_file If mapping was successful, then the page cache
* file's filename will be stored in here.
* <tt>page_cache_file.data</tt> must already point to
* a buffer, and <tt>page_cache_file.len</tt> must be set
* to the size of this buffer, including terminating NUL.
*/
static int
map_uri_to_page_cache_file(ngx_http_request_t *r, ngx_str_t *public_dir,
const u_char *filename, size_t filename_len,
ngx_str_t *page_cache_file)
{
u_char *end;
if ((r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) || filename_len == 0) {
return 0;
}
/* From this point on we know that filename is not an empty string. */
/* Check whether `filename` is equal to public_dir.
* `filename` may also be equal to public_dir + "/" so check for that as well.
*/
if (mapped_filename_equals(filename, filename_len, public_dir)) {
/* If the URI maps to the 'public' or the alias directory (i.e. the request is the
* base URI) then index.html is the page cache file.
*/
if (filename_len + sizeof("/index.html") > page_cache_file->len) {
/* Page cache filename doesn't fit in the buffer. */
return 0;
}
end = ngx_copy(page_cache_file->data, filename, filename_len);
if (filename[filename_len - 1] != '/') {
end = ngx_copy(end, "/", 1);
}
end = ngx_copy(end, "index.html", sizeof("index.html"));
} else if (filename[filename_len - 1] == '/') {
/* if the filename ends with '/' check for filename + "index.html". */
if (filename_len + sizeof("index.html") > page_cache_file->len) {
/* Page cache filename doesn't fit in the buffer. */
return 0;
}
end = ngx_copy(page_cache_file->data, filename, filename_len);
end = ngx_copy(end, "index.html", sizeof("index.html"));
} else {
/* Otherwise, the page cache file is just filename + ".html". */
if (filename_len + sizeof(".html") > page_cache_file->len) {
/* Page cache filename doesn't fit in the buffer. */
return 0;
}
end = ngx_copy(page_cache_file->data, filename, filename_len);
end = ngx_copy(end, ".html", sizeof(".html"));
}
if (file_exists(page_cache_file->data, 0)) {
page_cache_file->len = end - page_cache_file->data - 1;
return 1;
} else {
return 0;
}
}
static void
cleanup_detector_result(void *data) {
psg_app_type_detector_result_deinit((PsgAppTypeDetectorResult *) data);
}
static int
find_base_uri(ngx_http_request_t *r, const passenger_loc_conf_t *loc,
ngx_str_t *found_base_uri)
{
ngx_uint_t i;
ngx_str_t *base_uris, *base_uri, *uri;
if (loc->autogenerated.base_uris == NGX_CONF_UNSET_PTR) {
return 0;
} else {
base_uris = (ngx_str_t *) loc->autogenerated.base_uris->elts;
uri = &r->uri;
for (i = 0; i < loc->autogenerated.base_uris->nelts; i++) {
base_uri = &base_uris[i];
if (base_uri->len == 1 && base_uri->data[0] == '/') {
/* Ignore 'passenger_base_uri /' options. Users usually
* specify this out of ignorance.
*/
continue;
}
if (( uri->len == base_uri->len
&& ngx_strncmp(uri->data, base_uri->data, uri->len) == 0 )
|| ( uri->len > base_uri->len
&& ngx_strncmp(uri->data, base_uri->data, base_uri->len) == 0
&& uri->data[base_uri->len] == (u_char) '/' )) {
*found_base_uri = *base_uri;
return 1;
}
}
return 0;
}
}
static void
set_upstream_server_address(ngx_http_upstream_t *upstream, ngx_http_upstream_conf_t *upstream_config) {
ngx_http_upstream_server_t *servers = upstream_config->upstream->servers->elts;
ngx_addr_t *address = &servers[0].addrs[0];
const char *core_address;
unsigned int core_address_len;
struct sockaddr_un *sockaddr;
/* The Nginx API makes it extremely difficult to register an upstream server
* address outside of the configuration loading phase. However we don't know
* the Passenger core's request socket filename until we're done with loading
* the configuration. So during configuration loading we register a placeholder
* address for the upstream configuration, and while processing requests
* we substitute the placeholder filename with the real Passenger core request
* socket filename.
*/
if (address->name.data == pp_placeholder_upstream_address.data) {
sockaddr = (struct sockaddr_un *) address->sockaddr;
core_address =
psg_watchdog_launcher_get_core_address(psg_watchdog_launcher,
&core_address_len);
core_address += sizeof("unix:") - 1;
core_address_len -= sizeof("unix:") - 1;
address->name.data = (u_char *) core_address;
address->name.len = core_address_len;
strncpy(sockaddr->sun_path, core_address, sizeof(sockaddr->sun_path));
sockaddr->sun_path[sizeof(sockaddr->sun_path) - 1] = '\0';
}
}
/**
* If the Passenger core socket cannot be connected to then we want Nginx to print
* the proper socket filename in the error message. The socket filename is stored
* in one of the upstream peer data structures. This name is initialized during
* the first ngx_http_read_client_request_body() call so there's no way to fix the
* name before the first request, which is why we do it after the fact.
*/
static void
fix_peer_address(ngx_http_request_t *r) {
ngx_http_upstream_rr_peer_data_t *rrp;
ngx_http_upstream_rr_peers_t *peers;
ngx_http_upstream_rr_peer_t *peer;
unsigned int peer_index;
const char *core_address;
unsigned int core_address_len;
if (r->upstream->peer.get != ngx_http_upstream_get_round_robin_peer) {
/* This function only supports the round-robin upstream method. */
return;
}
rrp = r->upstream->peer.data;
peers = rrp->peers;
core_address =
psg_watchdog_launcher_get_core_address(psg_watchdog_launcher,
&core_address_len);
while (peers != NULL) {
if (peers->name) {
if (peers->name->data == (u_char *) core_address) {
/* Peer names already fixed. */
return;
}
peers->name->data = (u_char *) core_address;
peers->name->len = core_address_len;
}
peer_index = 0;
while (1) {
peer = &peers->peer[peer_index];
peer->name.data = (u_char *) core_address;
peer->name.len = core_address_len;
if (peer->down) {
peer_index++;
} else {
break;
}
}
peers = peers->next;
}
}
#if (NGX_HTTP_CACHE)
static ngx_int_t
create_key(ngx_http_request_t *r)
{
ngx_str_t *key;
passenger_loc_conf_t *slcf;
key = ngx_array_push(&r->cache->keys);
if (key == NULL) {
return NGX_ERROR;
}
slcf = ngx_http_get_module_loc_conf(r, ngx_http_passenger_module);
if (ngx_http_complex_value(r, &slcf->cache_key, key) != NGX_OK) {
return NGX_ERROR;
}
return NGX_OK;
}
#endif
/**
* Checks whether the given header is "Transfer-Encoding".
* We do not pass Transfer-Encoding headers to the Passenger core because
* Nginx always buffers the request body and always sets Content-Length
* in the request headers.
*/
static int
header_is_transfer_encoding(ngx_str_t *key)
{
return key->len == sizeof("transfer-encoding") - 1 &&
ngx_tolower(key->data[0]) == (u_char) 't' &&
ngx_tolower(key->data[sizeof("transfer-encoding") - 2]) == (u_char) 'g' &&
ngx_strncasecmp(key->data + 1, (u_char *) "ransfer-encodin", sizeof("ransfer-encodin") - 1) == 0;
}
/* Given an ngx_chain_t head and tail position, appends a new chain element at the end,
* updates the head (if necessary) and returns the new element.
*
* - The element is allocated from a freelist.
* - Ensures that the element contains a buffer of at least `size` bytes.
* - Sets the given tag on the buffer in the chain element.
*
* On error, returns NULL without modifying the given chain.
*/
static ngx_chain_t *
append_ngx_chain_element(ngx_pool_t *p, ngx_chain_t **head,
ngx_chain_t *tail, ngx_chain_t **freelist, ngx_buf_tag_t tag, size_t size)
{
ngx_chain_t *elem;
ngx_buf_t *buf;
elem = ngx_chain_get_free_buf(p, freelist);
if (elem == NULL) {
return NULL;
}
buf = elem->buf;
buf->tag = tag;
if (size > 0 && (buf->pos == NULL || buf->last == NULL
|| (size_t) ngx_buf_size(buf) < size))
{
ngx_memzero(buf, sizeof(ngx_buf_t));
buf->start = ngx_palloc(p, size);
if (buf->start == NULL) {
return NULL;
}
/*
* set by ngx_memzero():
*
* b->file_pos = 0;
* b->file_last = 0;
* b->file = NULL;
* b->shadow = NULL;
* b->tag = 0;
* and flags
*/
buf->pos = buf->start;
buf->last = buf->start;
buf->end = buf->last + size;
buf->temporary = 1;
}
if (*head == NULL) {
*head = elem;
} else {
tail->next = elem;
}
return elem;
}
/* Given a chain of buffers containing client body data,
* this filter wraps all that data into chunked encoding
* headers and footers.
*/
static ngx_int_t
body_rechunk_output_filter(void *data, ngx_chain_t *input)
{
ngx_http_request_t *r = data;
ngx_chain_t *output_head = NULL, *output_tail = NULL;
ngx_int_t body_eof_reached = 0;
ngx_int_t rc;
passenger_context_t *ctx;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
PROGRAM_NAME " rechunk output filter");
ctx = ngx_http_get_module_ctx(r, ngx_http_passenger_module);
if (input == NULL) {
goto out;
}
if (!ctx->header_sent) {
/* The first buffer contains the request header, so pass it unmodified. */
ctx->header_sent = 1;
while (input != NULL) {
output_tail = append_ngx_chain_element(r->pool,
&output_head, output_tail, &ctx->free,
(ngx_buf_tag_t) &body_rechunk_output_filter,
0);
if (output_tail == NULL) {
return NGX_ERROR;
}
ngx_memcpy(output_tail->buf, input->buf, sizeof(ngx_buf_t));
body_eof_reached = input->buf->last_buf;
input = input->next;
}
} else {
while (input != NULL) {
/* Append chunked encoding size header */
output_tail = append_ngx_chain_element(r->pool,
&output_head, output_tail, &ctx->free,
(ngx_buf_tag_t) &body_rechunk_output_filter,
32);
if (output_tail == NULL) {
return NGX_ERROR;
}
output_tail->buf->last = ngx_sprintf(output_tail->buf->last, "%xO\r\n",
ngx_buf_size(input->buf));
/* Append chunked encoding payload */
output_tail = append_ngx_chain_element(r->pool,
&output_head, output_tail, &ctx->free,
(ngx_buf_tag_t) &body_rechunk_output_filter,
0);
if (output_tail == NULL) {
return NGX_ERROR;
}
ngx_memcpy(output_tail->buf, input->buf, sizeof(ngx_buf_t));
/* Append chunked encoding footer */
output_tail = append_ngx_chain_element(r->pool,
&output_head, output_tail, &ctx->free,
(ngx_buf_tag_t) &body_rechunk_output_filter,
2);
if (output_tail == NULL) {
return NGX_ERROR;
}
output_tail->buf->last = ngx_copy(output_tail->buf->last, "\r\n", 2);
body_eof_reached = input->buf->last_buf;
input = input->next;
}
}
if (body_eof_reached) {
/* Append final termination chunk. */
output_tail = append_ngx_chain_element(r->pool,
&output_head, output_tail, &ctx->free,
(ngx_buf_tag_t) &body_rechunk_output_filter,
5);
if (output_tail == NULL) {
return NGX_ERROR;
}
output_tail->buf->last = ngx_copy(output_tail->buf->last,
"0\r\n\r\n", 5);
}
out:
rc = ngx_chain_writer(&r->upstream->writer, output_head);
/*
* The previous ngx_chain_writer() call consumed some buffers.
* Find such consumped (empty) buffers in the output buffer list,
* and either free them or add them to the freelist depending on
* whether the buffer's tag matches ours.
*/
ngx_chain_update_chains(r->pool, &ctx->free, &ctx->busy, &output_head,
(ngx_buf_tag_t) &body_rechunk_output_filter);
return rc;
}
#define SET_NGX_STR(str, the_data) \
do { \
(str)->data = (u_char *) the_data; \
(str)->len = sizeof(the_data) - 1; \
} while (0)
#define SET_NGX_STR_WITH_NULL(str, the_data) \
do { \
(str)->data = (u_char *) the_data; \
(str)->len = sizeof(the_data); \
} while (0)
typedef struct {
ngx_str_t method; /* Includes trailing space */
ngx_str_t app_type;
ngx_str_t app_start_command;
ngx_str_t escaped_uri;
ngx_str_t content_length; /* Only used if !r->request_body_no_buffering */
ngx_str_t core_password;
ngx_str_t remote_port;
} buffer_construction_state;
/* prepare_request_buffer_construction() and construct_request_buffer() are
* used to create an HTTP request header buffer to be sent to the Core Controller.
*
* construct_request_buffer() is actually called twice: the first time in "no-op" mode to
* calculate how many bytes it must allocate, and the second time to actually create the
* buffer. For efficiency reasons, as much preparation work as possible is split into
* the prepare_request_buffer_construction() function so that the two construct_request_buffer()
* calls don't have to perform that work twice.
*/
static ngx_int_t
prepare_request_buffer_construction(ngx_http_request_t *r, passenger_loc_conf_t *slcf,
passenger_context_t *context, buffer_construction_state *state)
{
unsigned int len;
ngx_uint_t port;
struct sockaddr_in *sin;
#if (NGX_HAVE_INET6)
struct sockaddr_in6 *sin6;
#endif
const PsgWrapperRegistryEntry *wrapper_registry_entry;
/* Construct HTTP method string, including trailing space. */
switch (r->method) {
case NGX_HTTP_GET:
SET_NGX_STR(&state->method, "GET ");
break;
case NGX_HTTP_HEAD:
SET_NGX_STR(&state->method, "HEAD ");
break;
case NGX_HTTP_POST:
SET_NGX_STR(&state->method, "POST ");
break;
case NGX_HTTP_PUT:
SET_NGX_STR(&state->method, "PUT ");
break;
case NGX_HTTP_DELETE:
SET_NGX_STR(&state->method, "DELETE ");
break;
case NGX_HTTP_MKCOL:
SET_NGX_STR(&state->method, "MKCOL ");
break;
case NGX_HTTP_COPY:
SET_NGX_STR(&state->method, "COPY ");
break;
case NGX_HTTP_MOVE:
SET_NGX_STR(&state->method, "MOVE ");
break;
case NGX_HTTP_OPTIONS:
SET_NGX_STR(&state->method, "OPTIONS ");
break;
case NGX_HTTP_PROPFIND:
SET_NGX_STR(&state->method, "PROPFIND ");
break;
case NGX_HTTP_PROPPATCH:
SET_NGX_STR(&state->method, "PROPPATCH ");
break;
case NGX_HTTP_LOCK:
SET_NGX_STR(&state->method, "LOCK ");
break;
case NGX_HTTP_UNLOCK:
SET_NGX_STR(&state->method, "UNLOCK ");
break;
case NGX_HTTP_PATCH:
SET_NGX_STR(&state->method, "PATCH ");
break;
case NGX_HTTP_TRACE:
SET_NGX_STR(&state->method, "TRACE ");
break;
default:
SET_NGX_STR(&state->method, "UNKNOWN ");
break;
}
if (slcf->autogenerated.app_start_command.data != NULL) {
/* The config specified that this is either a generic app or a Kuria app. */
state->app_type.data = NULL;
state->app_type.len = 0;
state->app_start_command = slcf->autogenerated.app_start_command;
} else {
wrapper_registry_entry = psg_app_type_detector_result_get_wrapper_registry_entry(
context->detector_result);
if (wrapper_registry_entry != NULL) {
/* This is an auto-supported app. */
state->app_type.data = (u_char *) psg_wrapper_registry_entry_get_language(wrapper_registry_entry,
&state->app_type.len);
state->app_start_command.data = NULL;
state->app_start_command.len = 0;
} else {
/* This has been autodetected to be a generic app or a Kuria app. */
state->app_type.data = NULL;
state->app_type.len = 0;
state->app_start_command.data = (u_char *) psg_app_type_detector_result_get_app_start_command(
context->detector_result, &state->app_start_command.len);
}
}
/*
* Nginx unescapes URI's before passing them to Phusion Passenger,
* but backend processes expect the escaped version.
* http://code.google.com/p/phusion-passenger/issues/detail?id=404
*
* Here we check whether Nginx has rewritten the URI or not. If not,
* we can use the raw, unparsed URI as sent by the client.
*/
if (r->valid_unparsed_uri && r->main) {
state->escaped_uri = r->unparsed_uri;
const char *pos = memchr((const char *) r->unparsed_uri.data, '?', r->unparsed_uri.len);
if (pos != NULL) {
state->escaped_uri.len = pos - (const char *) r->unparsed_uri.data;
}
} else {
state->escaped_uri.len =
2 * ngx_escape_uri(NULL, r->uri.data, r->uri.len, NGX_ESCAPE_URI)
+ r->uri.len;
state->escaped_uri.data = ngx_pnalloc(r->pool, state->escaped_uri.len);
if (state->escaped_uri.data == NULL) {
return NGX_ERROR;
}
ngx_escape_uri(state->escaped_uri.data, r->uri.data, r->uri.len,
NGX_ESCAPE_URI);
}
if (r->headers_in.chunked && !r->request_body_no_buffering) {
/* If the request body is chunked, then Nginx sets r->headers_in.content_length_n
* but does not set r->headers_in.headers, so we add this header ourselves.
*/
state->content_length.data = ngx_pnalloc(r->pool, sizeof("4294967295") - 1);
state->content_length.len = ngx_snprintf(state->content_length.data,
sizeof("4294967295") - 1, "%O", r->headers_in.content_length_n)
- state->content_length.data;
} // else: content_length not used
state->core_password.data = (u_char *) psg_watchdog_launcher_get_core_password(
psg_watchdog_launcher, &len);
state->core_password.len = len;
switch (r->connection->sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
sin6 = (struct sockaddr_in6 *) r->connection->sockaddr;
port = ntohs(sin6->sin6_port);
break;
#endif
#if (NGX_HAVE_UNIX_DOMAIN)
case AF_UNIX:
port = 0;
break;
#endif
default: /* AF_INET */
sin = (struct sockaddr_in *) r->connection->sockaddr;
port = ntohs(sin->sin_port);
break;
}
state->remote_port.data = ngx_pnalloc(r->pool, sizeof("65535") - 1);
if (state->remote_port.data == NULL) {
return NGX_ERROR;
}
if (port > 0 && port < 65536) {
state->remote_port.len = ngx_snprintf(state->remote_port.data,
sizeof("65535") - 1, "%ui", port) - state->remote_port.data;
} else {
state->remote_port.len = 0;
}
return NGX_OK;
}
/* See comment for prepare_request_buffer_construction() */
static ngx_uint_t
construct_request_buffer(ngx_http_request_t *r, passenger_loc_conf_t *slcf,
passenger_context_t *context, buffer_construction_state *state, ngx_buf_t *b)
{
#define PUSH_STATIC_STR(str) \
do { \
if (b != NULL) { \
b->last = ngx_copy(b->last, (const u_char *) str, \
sizeof(str) - 1); \
} \
total_size += sizeof(str) - 1; \
} while (0)
ngx_uint_t total_size = 0;
ngx_uint_t i;
ngx_list_part_t *part;
ngx_table_elt_t *header;
size_t len;
ngx_str_t public_dir_parent;
ngx_str_t public_dir_resolved;
const char *temp_path;
ngx_http_script_len_code_pt lcode;
ngx_http_script_code_pt code;
ngx_http_script_engine_t e, le;
if (b != NULL) {
b->last = ngx_copy(b->last, state->method.data, state->method.len);
}
total_size += state->method.len;
if (b != NULL) {
b->last = ngx_copy(b->last, state->escaped_uri.data, state->escaped_uri.len);
}
total_size += state->escaped_uri.len;
if (r->args.len > 0) {
if (b != NULL) {
b->last = ngx_copy(b->last, "?", 1);
b->last = ngx_copy(b->last, r->args.data, r->args.len);
}
total_size += r->args.len + 1;
}
PUSH_STATIC_STR(" HTTP/1.1\r\nConnection: close\r\n");
part = &r->headers_in.headers.part;
header = part->elts;
for (i = 0; /* void */; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
header = part->elts;
i = 0;
}
if (ngx_hash_find(&slcf->headers_set_hash, header[i].hash,
header[i].lowcase_key, header[i].key.len)
|| (!r->request_body_no_buffering && header_is_transfer_encoding(&header[i].key)))
{
continue;
}
if (b != NULL) {
b->last = ngx_copy(b->last, header[i].key.data, header[i].key.len);
b->last = ngx_copy(b->last, ": ", 2);
b->last = ngx_copy(b->last, header[i].value.data, header[i].value.len);
b->last = ngx_copy(b->last, "\r\n", 2);
}
total_size += header[i].key.len + header[i].value.len + 4;
}
if (r->headers_in.chunked && !r->request_body_no_buffering) {
PUSH_STATIC_STR("Content-Length: ");
if (b != NULL) {
b->last = ngx_copy(b->last, state->content_length.data,
state->content_length.len);
}
total_size += state->content_length.len;
PUSH_STATIC_STR("\r\n");
}
if (slcf->headers_set_len) {
ngx_memzero(&le, sizeof(ngx_http_script_engine_t));
ngx_http_script_flush_no_cacheable_variables(r, slcf->flushes);
le.ip = slcf->headers_set_len->elts;
le.request = r;
le.flushed = 1;
while (*(uintptr_t *) le.ip) {
while (*(uintptr_t *) le.ip) {
lcode = *(ngx_http_script_len_code_pt *) le.ip;
total_size += lcode(&le);
}
le.ip += sizeof(uintptr_t);
}
if (b != NULL) {
ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
e.ip = slcf->headers_set->elts;
e.pos = b->last;
e.request = r;
e.flushed = 1;
le.ip = slcf->headers_set_len->elts;
while (*(uintptr_t *) le.ip) {
lcode = *(ngx_http_script_len_code_pt *) le.ip;
/* skip the header line name length */
(void) lcode(&le);
if (*(ngx_http_script_len_code_pt *) le.ip) {
for (len = 0; *(uintptr_t *) le.ip; len += lcode(&le)) {
lcode = *(ngx_http_script_len_code_pt *) le.ip;
}
e.skip = (len == sizeof("\r\n") - 1) ? 1 : 0;
} else {
e.skip = 0;
}
le.ip += sizeof(uintptr_t);
while (*(uintptr_t *) e.ip) {
code = *(ngx_http_script_code_pt *) e.ip;
code((ngx_http_script_engine_t *) &e);
}
e.ip += sizeof(uintptr_t);
}
b->last = e.pos;
}
}
if (b != NULL) {
b->last = ngx_copy(b->last, "!~: ", sizeof("!~: ") - 1);
b->last = ngx_copy(b->last, state->core_password.data,
state->core_password.len);
b->last = ngx_copy(b->last, "\r\n", sizeof("\r\n") - 1);
}
total_size += (sizeof("!~: \r\n") - 1) + state->core_password.len;
PUSH_STATIC_STR("!~DOCUMENT_ROOT: ");
if (b != NULL) {
b->last = ngx_copy(b->last, context->public_dir.data,
context->public_dir.len);
}
total_size += context->public_dir.len;
PUSH_STATIC_STR("\r\n");
if (context->base_uri.len > 0) {
PUSH_STATIC_STR("!~SCRIPT_NAME: ");
if (b != NULL) {
b->last = ngx_copy(b->last, context->base_uri.data,
context->base_uri.len);
}
total_size += context->base_uri.len;
PUSH_STATIC_STR("\r\n");
}
PUSH_STATIC_STR("!~REMOTE_ADDR: ");
if (b != NULL) {
b->last = ngx_copy(b->last, r->connection->addr_text.data,
r->connection->addr_text.len);
}
total_size += r->connection->addr_text.len;
PUSH_STATIC_STR("\r\n");
PUSH_STATIC_STR("!~REMOTE_PORT: ");
if (b != NULL) {
b->last = ngx_copy(b->last, state->remote_port.data,
state->remote_port.len);
}
total_size += state->remote_port.len;
PUSH_STATIC_STR("\r\n");
if (r->headers_in.user.len > 0) {
PUSH_STATIC_STR("!~REMOTE_USER: ");
if (b != NULL) {
b->last = ngx_copy(b->last, r->headers_in.user.data,
r->headers_in.user.len);
}
total_size += r->headers_in.user.len;
PUSH_STATIC_STR("\r\n");
}
if (slcf->autogenerated.app_group_name.data == NULL) {
PUSH_STATIC_STR("!~PASSENGER_APP_GROUP_NAME: ");
if (slcf->autogenerated.app_root.data == NULL) {
if (context->base_uri.data == NULL) {
/* If no passenger_base_uri applies, then the app
* group name is based on the parent directory of
* the document root.
*/
public_dir_parent.data = (u_char *) psg_extract_dir_name_static(
(const char *) context->public_dir.data,
context->public_dir.len,
&public_dir_parent.len);
} else {
/* If a passenger_base_uri applies, then the document
* root may be a symlink. We base the app group name
* on `extractDirName(resolveSymlink(public_dir))`.
*/
public_dir_resolved.data = (u_char *)
psg_resolve_symlink((const char *) context->public_dir.data,
context->public_dir.len, &public_dir_resolved.len);
if (public_dir_resolved.data == NULL) {
/* Resolve or memory allocation error. Fallback to
* assuming that no passenger_base_uri applies.
*/
ngx_log_error(NGX_LOG_ERR, r->connection->log, ngx_errno,
"error resolving symlink %V",
&context->public_dir);
public_dir_parent.data = (u_char *) psg_extract_dir_name_static(
(const char *) context->public_dir.data,
context->public_dir.len,
&public_dir_parent.len);
} else {
temp_path = psg_extract_dir_name_static(
(const char *) public_dir_resolved.data,
public_dir_resolved.len,
&public_dir_parent.len);
public_dir_parent.data = ngx_pnalloc(r->pool,
public_dir_parent.len);
memcpy(public_dir_parent.data, temp_path,
public_dir_parent.len);
free(public_dir_resolved.data);
}
}
if (b != NULL) {
b->last = ngx_copy(b->last, public_dir_parent.data,
public_dir_parent.len);
}
total_size += public_dir_parent.len;
} else {
if (b != NULL) {
b->last = ngx_copy(b->last,
slcf->autogenerated.app_root.data,
slcf->autogenerated.app_root.len);
}
total_size += slcf->autogenerated.app_root.len;
}
if (slcf->autogenerated.environment.data != NULL) {
if (b != NULL) {
b->last = ngx_copy(b->last, " (", 2);
b->last = ngx_copy(b->last, slcf->autogenerated.environment.data,
slcf->autogenerated.environment.len);
b->last = ngx_copy(b->last, ")", 1);
}
total_size += (sizeof(" (") - 1) + slcf->autogenerated.environment.len + (sizeof(")") - 1);
}
PUSH_STATIC_STR("\r\n");
}
if (state->app_type.len > 0) {
PUSH_STATIC_STR("!~PASSENGER_APP_TYPE: ");
if (b != NULL) {
b->last = ngx_copy(b->last, state->app_type.data,
state->app_type.len);
}
total_size += state->app_type.len;
PUSH_STATIC_STR("\r\n");
} else {
PUSH_STATIC_STR("!~PASSENGER_APP_START_COMMAND: ");
if (b != NULL) {
b->last = ngx_copy(b->last, state->app_start_command.data,
state->app_start_command.len);
}
total_size += state->app_start_command.len;
PUSH_STATIC_STR("\r\n");
}
if (b != NULL) {
b->last = ngx_copy(b->last, slcf->options_cache.data, slcf->options_cache.len);
}
total_size += slcf->options_cache.len;
if (slcf->env_vars_cache.data != NULL) {
PUSH_STATIC_STR("!~PASSENGER_ENV_VARS: ");
if (b != NULL) {
b->last = ngx_copy(b->last, slcf->env_vars_cache.data, slcf->env_vars_cache.len);
}
total_size += slcf->env_vars_cache.len;
PUSH_STATIC_STR("\r\n");
}
/* D = Dechunk response
* Prevent Nginx from rechunking the response.
* B = Buffer request body
* C = Strip 100 Continue header
* S = SSL
*/
PUSH_STATIC_STR("!~FLAGS: CD");
if (slcf->autogenerated.buffer_upload) {
PUSH_STATIC_STR("B");
}
#if (NGX_HTTP_SSL)
if (r->http_connection != NULL /* happens in sub-requests */
&& r->http_connection->ssl) {
PUSH_STATIC_STR("S");
}
#endif
PUSH_STATIC_STR("\r\n\r\n");
return total_size;
#undef PUSH_STATIC_STR
}
static ngx_int_t
create_request(ngx_http_request_t *r)
{
passenger_loc_conf_t *slcf;
passenger_context_t *context;
buffer_construction_state state;
ngx_uint_t request_size;
ngx_buf_t *b;
ngx_chain_t *cl, *body;
slcf = ngx_http_get_module_loc_conf(r, ngx_http_passenger_module);
context = ngx_http_get_module_ctx(r, ngx_http_passenger_module);
if (context == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
/* Construct and pass request headers */
if (prepare_request_buffer_construction(r, slcf, context, &state) != NGX_OK) {
return NGX_ERROR;
}
request_size = construct_request_buffer(r, slcf, context, &state, NULL);
b = ngx_create_temp_buf(r->pool, request_size);
if (b == NULL) {
return NGX_ERROR;
}
construct_request_buffer(r, slcf, context, &state, b);
cl = ngx_alloc_chain_link(r->pool);
if (cl == NULL) {
return NGX_ERROR;
}
cl->buf = b;
/* Pass already received request body buffers. Make sure they come
* after the request header buffer we just constructed.
*/
body = r->upstream->request_bufs;
r->upstream->request_bufs = cl;
while (body) {
if (r->headers_in.chunked && r->request_body_no_buffering) {
/* If Transfer-Encoding is chunked, then Nginx dechunks the body.
* If at the same time request body buffering is disabled, then
* we pass the Transfer-Encoding header to the Passenger Core,
* and thus we also need to ensure we rechunk the body.
*/
b = ngx_create_temp_buf(r->pool, 32);
if (b == NULL) {
return NGX_ERROR;
}
b->last = ngx_sprintf(b->last, "%xO\r\n",
ngx_buf_size(body->buf));
cl->next = ngx_alloc_chain_link(r->pool);
if (cl->next == NULL) {
return NGX_ERROR;
}
cl = cl->next;
cl->buf = b;
}
b = ngx_alloc_buf(r->pool);
if (b == NULL) {
return NGX_ERROR;
}
ngx_memcpy(b, body->buf, sizeof(ngx_buf_t));
cl->next = ngx_alloc_chain_link(r->pool);
if (cl->next == NULL) {
return NGX_ERROR;
}
cl = cl->next;
cl->buf = b;
body = body->next;
if (r->headers_in.chunked && r->request_body_no_buffering) {
b = ngx_create_temp_buf(r->pool, 2);
if (b == NULL) {
return NGX_ERROR;
}
b->last = ngx_copy(b->last, "\r\n", 2);
cl->next = ngx_alloc_chain_link(r->pool);
if (cl->next == NULL) {
return NGX_ERROR;
}
cl = cl->next;
cl->buf = b;
}
}
b->flush = 1;
cl->next = NULL;
/* Again, if Transfer-Encoding is chunked, then Nginx dechunks the body.
* Here we install an output filter to make sure that the request body parts
* that will be received in the future, will also be rechunked when passed
* to the Passenger Core.
*/
if (r->headers_in.chunked && r->request_body_no_buffering) {
r->upstream->output.output_filter = body_rechunk_output_filter;
r->upstream->output.filter_ctx = r;
}
return NGX_OK;
}
static ngx_int_t
reinit_request(ngx_http_request_t *r)
{
passenger_context_t *context;
context = ngx_http_get_module_ctx(r, ngx_http_passenger_module);
if (context == NULL) {
return NGX_OK;
}
context->status = 0;
context->status_count = 0;
context->status_start = NULL;
context->status_end = NULL;
r->upstream->process_header = process_status_line;
r->state = 0;
return NGX_OK;
}
static ngx_int_t
process_status_line(ngx_http_request_t *r)
{
ngx_int_t rc;
ngx_http_upstream_t *u;
passenger_context_t *context;
context = ngx_http_get_module_ctx(r, ngx_http_passenger_module);
if (context == NULL) {
return NGX_ERROR;
}
rc = parse_status_line(r, context);
if (rc == NGX_AGAIN) {
return rc;
}
u = r->upstream;
if (rc == NGX_HTTP_SCGI_PARSE_NO_HEADER) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"upstream sent no valid HTTP/1.0 header");
#if 0
if (u->accel) {
return NGX_HTTP_UPSTREAM_INVALID_HEADER;
}
#endif
u->headers_in.status_n = NGX_HTTP_OK;
u->state->status = NGX_HTTP_OK;
return NGX_OK;
}
u->headers_in.status_n = context->status;
u->state->status = context->status;
u->headers_in.status_line.len = context->status_end - context->status_start;
u->headers_in.status_line.data = ngx_palloc(r->pool,
u->headers_in.status_line.len);
if (u->headers_in.status_line.data == NULL) {
return NGX_ERROR;
}
ngx_memcpy(u->headers_in.status_line.data, context->status_start,
u->headers_in.status_line.len);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http scgi status %ui \"%V\"",
u->headers_in.status_n, &u->headers_in.status_line);
u->process_header = process_header;
return process_header(r);
}
static ngx_int_t
parse_status_line(ngx_http_request_t *r, passenger_context_t *context)
{
u_char ch;
u_char *pos;
ngx_http_upstream_t *u;
enum {
sw_start = 0,
sw_H,
sw_HT,
sw_HTT,
sw_HTTP,
sw_first_major_digit,
sw_major_digit,
sw_first_minor_digit,
sw_minor_digit,
sw_status,
sw_space_after_status,
sw_status_text,
sw_almost_done
} state;
u = r->upstream;
state = r->state;
for (pos = u->buffer.pos; pos < u->buffer.last; pos++) {
ch = *pos;
switch (state) {
/* "HTTP/" */
case sw_start:
switch (ch) {
case 'H':
state = sw_H;
break;
default:
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
break;
case sw_H:
switch (ch) {
case 'T':
state = sw_HT;
break;
default:
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
break;
case sw_HT:
switch (ch) {
case 'T':
state = sw_HTT;
break;
default:
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
break;
case sw_HTT:
switch (ch) {
case 'P':
state = sw_HTTP;
break;
default:
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
break;
case sw_HTTP:
switch (ch) {
case '/':
state = sw_first_major_digit;
break;
default:
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
break;
/* the first digit of major HTTP version */
case sw_first_major_digit:
if (ch < '1' || ch > '9') {
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
state = sw_major_digit;
break;
/* the major HTTP version or dot */
case sw_major_digit:
if (ch == '.') {
state = sw_first_minor_digit;
break;
}
if (ch < '0' || ch > '9') {
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
break;
/* the first digit of minor HTTP version */
case sw_first_minor_digit:
if (ch < '0' || ch > '9') {
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
state = sw_minor_digit;
break;
/* the minor HTTP version or the end of the request line */
case sw_minor_digit:
if (ch == ' ') {
state = sw_status;
break;
}
if (ch < '0' || ch > '9') {
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
break;
/* HTTP status code */
case sw_status:
if (ch == ' ') {
break;
}
if (ch < '0' || ch > '9') {
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
context->status = context->status * 10 + ch - '0';
if (++context->status_count == 3) {
state = sw_space_after_status;
context->status_start = pos - 2;
}
break;
/* space or end of line */
case sw_space_after_status:
switch (ch) {
case ' ':
state = sw_status_text;
break;
case '.': /* IIS may send 403.1, 403.2, etc */
state = sw_status_text;
break;
case CR:
state = sw_almost_done;
break;
case LF:
goto done;
default:
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
break;
/* any text until end of line */
case sw_status_text:
switch (ch) {
case CR:
state = sw_almost_done;
break;
case LF:
goto done;
}
break;
/* end of status line */
case sw_almost_done:
context->status_end = pos - 1;
switch (ch) {
case LF:
goto done;
default:
return NGX_HTTP_SCGI_PARSE_NO_HEADER;
}
}
}
u->buffer.pos = pos;
r->state = state;
return NGX_AGAIN;
done:
u->buffer.pos = pos + 1;
if (context->status_end == NULL) {
context->status_end = pos;
}
r->state = sw_start;
return NGX_OK;
}
static ngx_int_t
process_header(ngx_http_request_t *r)
{
ngx_str_t *status_line;
ngx_int_t rc, status;
ngx_table_elt_t *h;
ngx_http_upstream_t *u;
ngx_http_upstream_header_t *hh;
ngx_http_upstream_main_conf_t *umcf;
ngx_http_core_loc_conf_t *clcf;
umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
for ( ;; ) {
rc = ngx_http_parse_header_line(r, &r->upstream->buffer, 1);
if (rc == NGX_OK) {
/* a header line has been parsed successfully */
h = ngx_list_push(&r->upstream->headers_in.headers);
if (h == NULL) {
return NGX_ERROR;
}
h->hash = r->header_hash;
h->key.len = r->header_name_end - r->header_name_start;
h->value.len = r->header_end - r->header_start;
h->key.data = ngx_pnalloc(r->pool,
h->key.len + 1 + h->value.len + 1
+ h->key.len);
if (h->key.data == NULL) {
return NGX_ERROR;
}
h->value.data = h->key.data + h->key.len + 1;
h->lowcase_key = h->key.data + h->key.len + 1 + h->value.len + 1;
ngx_memcpy(h->key.data, r->header_name_start, h->key.len);
h->key.data[h->key.len] = '\0';
ngx_memcpy(h->value.data, r->header_start, h->value.len);
h->value.data[h->value.len] = '\0';
if (h->key.len == r->lowcase_index) {
ngx_memcpy(h->lowcase_key, r->lowcase_header, h->key.len);
} else {
ngx_strlow(h->lowcase_key, h->key.data, h->key.len);
}
hh = ngx_hash_find(&umcf->headers_in_hash, h->hash,
h->lowcase_key, h->key.len);
if (hh && hh->handler(r, h, hh->offset) != NGX_OK) {
return NGX_ERROR;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http scgi header: \"%V: %V\"", &h->key, &h->value);
continue;
}
if (rc == NGX_HTTP_PARSE_HEADER_DONE) {
/* a whole header has been parsed successfully */
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http scgi header done");
/*
* if no "Server" and "Date" in header line,
* then add the default headers
*/
if (r->upstream->headers_in.server == NULL) {
h = ngx_list_push(&r->upstream->headers_in.headers);
if (h == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
h->hash = ngx_hash(ngx_hash(ngx_hash(ngx_hash(
ngx_hash('s', 'e'), 'r'), 'v'), 'e'), 'r');
h->key.len = sizeof("Server") - 1;
h->key.data = (u_char *) "Server";
if (!passenger_main_conf.autogenerated.show_version_in_header) {
if (clcf->server_tokens) {
h->value.data = (u_char *) (NGINX_VER " + " PROGRAM_NAME);
} else {
h->value.data = (u_char *) ("nginx + " PROGRAM_NAME);
}
} else {
if (clcf->server_tokens) {
h->value.data = (u_char *) (NGINX_VER " + " PROGRAM_NAME " " PASSENGER_VERSION);
} else {
h->value.data = (u_char *) ("nginx + " PROGRAM_NAME " " PASSENGER_VERSION);
}
}
h->value.len = ngx_strlen(h->value.data);
h->lowcase_key = (u_char *) "server";
}
if (r->upstream->headers_in.date == NULL) {
h = ngx_list_push(&r->upstream->headers_in.headers);
if (h == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
h->hash = ngx_hash(ngx_hash(ngx_hash('d', 'a'), 't'), 'e');
h->key.len = sizeof("Date") - 1;
h->key.data = (u_char *) "Date";
h->value.len = 0;
h->value.data = NULL;
h->lowcase_key = (u_char *) "date";
}
/* Process "Status" header. */
u = r->upstream;
if (u->headers_in.status_n) {
goto done;
}
if (u->headers_in.status) {
status_line = &u->headers_in.status->value;
status = ngx_atoi(status_line->data, 3);
if (status == NGX_ERROR) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"upstream sent invalid status \"%V\"",
status_line);
return NGX_HTTP_UPSTREAM_INVALID_HEADER;
}
u->headers_in.status_n = status;
u->headers_in.status_line = *status_line;
} else if (u->headers_in.location) {
u->headers_in.status_n = 302;
ngx_str_set(&u->headers_in.status_line,
"302 Moved Temporarily");
} else {
u->headers_in.status_n = 200;
ngx_str_set(&u->headers_in.status_line, "200 OK");
}
if (u->state && u->state->status == 0) {
u->state->status = u->headers_in.status_n;
}
done:
/* Supported since Nginx 1.3.15. */
#ifdef NGX_HTTP_SWITCHING_PROTOCOLS
if (u->headers_in.status_n == NGX_HTTP_SWITCHING_PROTOCOLS
&& r->headers_in.upgrade)
{
u->upgrade = 1;
}
#endif
return NGX_OK;
}
if (rc == NGX_AGAIN) {
return NGX_AGAIN;
}
/* there was error while a header line parsing */
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"upstream sent invalid header");
return NGX_HTTP_UPSTREAM_INVALID_HEADER;
}
}
static void
abort_request(ngx_http_request_t *r)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"abort Passenger request");
}
static void
finalize_request(ngx_http_request_t *r, ngx_int_t rc)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"finalize Passenger request");
}
ngx_int_t
passenger_content_handler(ngx_http_request_t *r)
{
ngx_int_t rc;
ngx_http_upstream_t *u;
passenger_loc_conf_t *slcf;
ngx_str_t path, base_uri;
u_char *path_last, *end;
u_char root_path_str[NGX_MAX_PATH + 1];
ngx_str_t root_path;
size_t root_len, len;
u_char page_cache_file_str[NGX_MAX_PATH + 1];
ngx_str_t page_cache_file;
passenger_context_t *context;
void *detector_result_mem;
ngx_pool_cleanup_t *detector_result_cleanup;
PP_Error error;
const PsgWrapperRegistryEntry *wrapper_registry_entry;
if (passenger_main_conf.autogenerated.root_dir.len == 0) {
return NGX_DECLINED;
}
slcf = ngx_http_get_module_loc_conf(r, ngx_http_passenger_module);
/* Let the next content handler take care of this request if Phusion
* Passenger is disabled for this URL.
*/
if (!slcf->autogenerated.enabled) {
return NGX_DECLINED;
}
/* Let the next content handler take care of this request if this URL
* maps to an existing file.
*/
path_last = ngx_http_map_uri_to_path(r, &path, &root_len, 0);
if (path_last != NULL && file_exists(path.data, 0)) {
return NGX_DECLINED;
}
/* Create a string containing the root path. This path already
* contains a trailing slash.
*/
end = ngx_copy(root_path_str, path.data, root_len);
*end = '\0';
root_path.data = root_path_str;
root_path.len = root_len;
context = ngx_pcalloc(r->pool, sizeof(passenger_context_t));
if (context == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_http_set_ctx(r, context, ngx_http_passenger_module);
/* Find the base URI for this web application, if any. */
if (find_base_uri(r, slcf, &base_uri)) {
/* Store the found base URI into context->public_dir. We infer that
* the 'public' directory of the web app equals document root + base URI.
*/
if (slcf->autogenerated.document_root.data != NULL) {
len = slcf->autogenerated.document_root.len + 1;
context->public_dir.data = ngx_palloc(r->pool, sizeof(u_char) * len);
end = ngx_copy(context->public_dir.data, slcf->autogenerated.document_root.data,
slcf->autogenerated.document_root.len);
} else {
len = root_path.len + base_uri.len + 1;
context->public_dir.data = ngx_palloc(r->pool, sizeof(u_char) * len);
end = ngx_copy(context->public_dir.data, root_path.data, root_path.len);
end = ngx_copy(end, base_uri.data, base_uri.len);
}
*end = '\0';
context->public_dir.len = len - 1;
context->base_uri = base_uri;
} else {
/* No base URI directives are applicable for this request. So assume that
* the web application's public directory is the document root.
* context->base_uri is now a NULL string.
*/
len = sizeof(u_char *) * (root_path.len + 1);
context->public_dir.data = ngx_palloc(r->pool, len);
end = ngx_copy(context->public_dir.data, root_path.data,
root_path.len);
*end = '\0';
context->public_dir.len = root_path.len;
}
if (context->public_dir.len == 0) {
/* If the `root` directive is set to `/` then `public_dir`
* becomes the empty string. We fix this into `/`.
*/
context->public_dir.data = (u_char *) "/";
context->public_dir.len = 1;
}
/* If there's a corresponding page cache file for this URL, then serve that
* file instead.
*/
page_cache_file.data = page_cache_file_str;
page_cache_file.len = sizeof(page_cache_file_str);
if (map_uri_to_page_cache_file(r, &context->public_dir, path.data,
path_last - path.data, &page_cache_file)) {
return passenger_static_content_handler(r, &page_cache_file);
}
detector_result_mem = ngx_palloc(r->pool,
psg_app_type_detector_result_get_object_size());
context->detector_result = psg_app_type_detector_result_init(detector_result_mem);
detector_result_cleanup = ngx_pool_cleanup_add(r->pool, 0);
detector_result_cleanup->handler = cleanup_detector_result;
detector_result_cleanup->data = context->detector_result;
/* If `app_start_command` is set, then it means the config specified that it is
* either a generic app or a Kuria app.
*/
if (slcf->autogenerated.app_start_command.data == NULL
&& slcf->autogenerated.app_type.data == NULL)
{
/* If neither `app_start_command` nor `app_type` are set, then
* autodetect what kind of app this is.
*/
pp_error_init(&error);
if (slcf->autogenerated.app_root.data == NULL) {
psg_app_type_detector_check_document_root(
psg_app_type_detector, context->detector_result,
(const char *) context->public_dir.data, context->public_dir.len,
context->base_uri.len != 0,
&error);
} else {
psg_app_type_detector_check_app_root(
psg_app_type_detector, context->detector_result,
(const char *) slcf->autogenerated.app_root.data, slcf->autogenerated.app_root.len,
&error);
}
if (psg_app_type_detector_result_is_null(context->detector_result)) {
if (error.message == NULL) {
return NGX_DECLINED;
} else if (error.errnoCode == EACCES) {
ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
"%s; This error means that the Nginx worker process (PID %d, "
"running as UID %d) does not have permission to access this file. "
"Please read this page to learn how to fix this problem: "
"https://www.phusionpassenger.com/library/admin/nginx/troubleshooting/?a=upon-accessing-the-web-app-nginx-reports-a-permission-denied-error; Extra info",
error.message,
(int) getpid(),
(int) getuid());
} else {
ngx_log_error(NGX_LOG_ALERT, r->connection->log,
(error.errnoCode == PP_NO_ERRNO) ? 0 : error.errnoCode,
"%s",
error.message);
}
pp_error_destroy(&error);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
} else if (slcf->autogenerated.app_start_command.data == NULL) {
/* If `app_start_command` is not set but `app_type` is, then
* verify whether the given `app_type` value is supported
* and resolve aliases.
*/
wrapper_registry_entry = psg_wrapper_registry_lookup(psg_wrapper_registry,
(const char *) slcf->autogenerated.app_type.data,
slcf->autogenerated.app_type.len);
if (psg_wrapper_registry_entry_is_null(wrapper_registry_entry)) {
return NGX_DECLINED;
} else {
psg_app_type_detector_result_set_wrapper_registry_entry(
context->detector_result, wrapper_registry_entry);
}
}
/* Setup upstream stuff and prepare sending the request to the Passenger core. */
if (ngx_http_upstream_create(r) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
u = r->upstream;
u->schema = pp_schema_string;
u->output.tag = (ngx_buf_tag_t) &ngx_http_passenger_module;
set_upstream_server_address(u, &slcf->upstream_config);
u->conf = &slcf->upstream_config;
#if (NGX_HTTP_CACHE)
u->create_key = create_key;
#endif
u->create_request = create_request;
u->reinit_request = reinit_request;
u->process_header = process_status_line;
u->abort_request = abort_request;
u->finalize_request = finalize_request;
r->state = 0;
u->buffering = slcf->upstream_config.buffering;
u->pipe = ngx_pcalloc(r->pool, sizeof(ngx_event_pipe_t));
if (u->pipe == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
u->pipe->input_filter = ngx_event_pipe_copy_input_filter;
u->pipe->input_ctx = r;
r->request_body_no_buffering = !slcf->upstream_config.request_buffering;
rc = ngx_http_read_client_request_body(r, ngx_http_upstream_init);
fix_peer_address(r);
if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
return rc;
}
return NGX_DONE;
}
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