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Add util_fcgi.h and associated definitions and support

routines for FastCGI, based largely on mod_proxy_fcgi.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1513454 13f79535-47bb-0310-9956-ffa450edef68
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1 parent 454a28f commit 4a8e67c19dd169d7584e6da9d20395311f13b13f @trawick trawick committed Aug 13, 2013
Showing with 584 additions and 2 deletions.
  1. +4 −0 CHANGES
  2. +1 −0 NWGNUmakefile
  3. +1 −0 build/nw_export.inc
  4. +2 −1 include/ap_mmn.h
  5. +280 −0 include/util_fcgi.h
  6. +8 −0 libhttpd.dsp
  7. +1 −1 server/Makefile.in
  8. +287 −0 server/util_fcgi.c
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@@ -1,6 +1,10 @@
-*- coding: utf-8 -*-
Changes with Apache 2.5.0
+ *) core: Add util_fcgi.h and associated definitions and support
+ routines for FastCGI, based largely on mod_proxy_fcgi.
+ [Jeff Trawick]
+
*) core: Add ap_log_data(), ap_log_rdata(), etc. for logging buffers.
[Jeff Trawick]
View
@@ -276,6 +276,7 @@ FILES_nlm_objs = \
$(OBJDIR)/util_expr_eval.o \
$(OBJDIR)/util_expr_parse.o \
$(OBJDIR)/util_expr_scan.o \
+ $(OBJDIR)/util_fcgi.o \
$(OBJDIR)/util_filter.o \
$(OBJDIR)/util_md5.o \
$(OBJDIR)/util_mutex.o \
View
@@ -62,6 +62,7 @@
#include "util_charset.h"
#include "util_cookies.h"
#include "util_ebcdic.h"
+#include "util_fcgi.h"
#include "util_filter.h"
/*#include "util_ldap.h"*/
#include "util_md5.h"
View
@@ -437,14 +437,15 @@
* 20130702.0 (2.5.0-dev) Remove pre_htaccess hook, add open_htaccess hook.
* 20130702.1 (2.5.0-dev) Restore AUTH_HANDLED to mod_auth.h
* 20130702.2 (2.5.0-dev) Add ap_log_data(), ap_log_rdata(), etc.
+ * 20130702.3 (2.5.0-dev) Add util_fcgi.h, FastCGI protocol support
*/
#define MODULE_MAGIC_COOKIE 0x41503235UL /* "AP25" */
#ifndef MODULE_MAGIC_NUMBER_MAJOR
#define MODULE_MAGIC_NUMBER_MAJOR 20130702
#endif
-#define MODULE_MAGIC_NUMBER_MINOR 2 /* 0...n */
+#define MODULE_MAGIC_NUMBER_MINOR 3 /* 0...n */
/**
* Determine if the server's current MODULE_MAGIC_NUMBER is at least a
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@@ -0,0 +1,280 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file util_fcgi.h
+ * @brief FastCGI protocol defitions and support routines
+ *
+ * @defgroup APACHE_CORE_FASTCGI FastCGI Tools
+ * @ingroup APACHE_CORE
+ * @{
+ */
+
+#ifndef APACHE_UTIL_FCGI_H
+#define APACHE_UTIL_FCGI_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "httpd.h"
+
+/**
+ * @brief A structure that represents the fixed header fields
+ * at the beginning of a "FastCGI record" (i.e., the data prior
+ * to content data and padding).
+ */
+typedef struct {
+ /** See values for version, below */
+ unsigned char version;
+ /** See values for type, below */
+ unsigned char type;
+ /** request id, in two parts */
+ unsigned char requestIdB1;
+ unsigned char requestIdB0;
+ /** content length, in two parts */
+ unsigned char contentLengthB1;
+ unsigned char contentLengthB0;
+ /** padding length */
+ unsigned char paddingLength;
+ /** 8-bit reserved field */
+ unsigned char reserved;
+} ap_fcgi_header;
+
+/*
+ * Number of bytes in the header portion of a FastCGI record
+ * (i.e., ap_fcgi_header structure). Future versions of the
+ * protocol may increase the size.
+ */
+#define AP_FCGI_HEADER_LEN 8
+
+/*
+ * Maximum number of bytes in the content portion of a FastCGI record.
+ */
+#define AP_FCGI_MAX_CONTENT_LEN 65535
+
+/**
+ * Possible values for the version field of ap_fcgi_header
+ */
+#define AP_FCGI_VERSION_1 1
+
+/**
+ * Possible values for the type field of ap_fcgi_header
+ */
+#define AP_FCGI_BEGIN_REQUEST 1
+#define AP_FCGI_ABORT_REQUEST 2
+#define AP_FCGI_END_REQUEST 3
+#define AP_FCGI_PARAMS 4
+#define AP_FCGI_STDIN 5
+#define AP_FCGI_STDOUT 6
+#define AP_FCGI_STDERR 7
+#define AP_FCGI_DATA 8
+#define AP_FCGI_GET_VALUES 9
+#define AP_FCGI_GET_VALUES_RESULT 10
+#define AP_FCGI_UNKNOWN_TYPE 11
+#define AP_FCGI_MAXTYPE (AP_FCGI_UNKNOWN_TYPE)
+
+/**
+ * Offsets of the various fields of ap_fcgi_header
+ */
+#define AP_FCGI_HDR_VERSION_OFFSET 0
+#define AP_FCGI_HDR_TYPE_OFFSET 1
+#define AP_FCGI_HDR_REQUEST_ID_B1_OFFSET 2
+#define AP_FCGI_HDR_REQUEST_ID_B0_OFFSET 3
+#define AP_FCGI_HDR_CONTENT_LEN_B1_OFFSET 4
+#define AP_FCGI_HDR_CONTENT_LEN_B0_OFFSET 5
+#define AP_FCGI_HDR_PADDING_LEN_OFFSET 6
+#define AP_FCGI_HDR_RESERVED_OFFSET 7
+
+/**
+ * @brief This represents the content data of the FastCGI record when
+ * the type is AP_FCGI_BEGIN_REQUEST.
+ */
+typedef struct {
+ /**
+ * role, in two parts
+ * See values for role, below
+ */
+ unsigned char roleB1;
+ unsigned char roleB0;
+ /**
+ * flags
+ * See values for flags bits, below
+ */
+ unsigned char flags;
+ /** reserved */
+ unsigned char reserved[5];
+} ap_fcgi_begin_request_body;
+
+/*
+ * Values for role component of ap_fcgi_begin_request_body
+ */
+#define AP_FCGI_RESPONDER 1
+#define AP_FCGI_AUTHORIZER 2
+#define AP_FCGI_FILTER 3
+
+/*
+ * Values for flags bits of ap_fcgi_begin_request_body
+ */
+#define AP_FCGI_KEEP_CONN 1 /* otherwise the application closes */
+
+/**
+ * Offsets of the various fields of ap_fcgi_begin_request_body
+ */
+#define AP_FCGI_BRB_ROLEB1_OFFSET 0
+#define AP_FCGI_BRB_ROLEB0_OFFSET 1
+#define AP_FCGI_BRB_FLAGS_OFFSET 2
+#define AP_FCGI_BRB_RESERVED0_OFFSET 3
+#define AP_FCGI_BRB_RESERVED1_OFFSET 4
+#define AP_FCGI_BRB_RESERVED2_OFFSET 5
+#define AP_FCGI_BRB_RESERVED3_OFFSET 6
+#define AP_FCGI_BRB_RESERVED4_OFFSET 7
+
+/**
+ * Pack ap_fcgi_header
+ * @param h The header to read from
+ * @param a The array to write to, of size AP_FCGI_HEADER_LEN
+ */
+AP_DECLARE(void) ap_fcgi_header_to_array(ap_fcgi_header *h,
+ unsigned char a[]);
+
+/**
+ * Unpack header of FastCGI record into ap_fcgi_header
+ * @param h The header to write to
+ * @param a The array to read from, of size AP_FCGI_HEADER_LEN
+ */
+AP_DECLARE(void) ap_fcgi_header_from_array(ap_fcgi_header *h,
+ unsigned char a[]);
+
+/**
+ * Unpack header of FastCGI record into individual fields
+ * @param version The version, on output
+ * @param type The type, on output
+ * @param request_id The request id, on output
+ * @param content_len The content length, on output
+ * @param padding_len The amount of padding following the content, on output
+ * @param a The array to read from, of size AP_FCGI_HEADER_LEN
+ */
+AP_DECLARE(void) ap_fcgi_header_fields_from_array(unsigned char *version,
+ unsigned char *type,
+ apr_uint16_t *request_id,
+ apr_uint16_t *content_len,
+ unsigned char *padding_len,
+ unsigned char a[]);
+
+/**
+ * Pack ap_fcgi_begin_request_body
+ * @param h The begin-request body to read from
+ * @param a The array to write to, of size AP_FCGI_HEADER_LEN
+ */
+AP_DECLARE(void) ap_fcgi_begin_request_body_to_array(ap_fcgi_begin_request_body *h,
+ unsigned char a[]);
+
+/**
+ * Fill in a FastCGI request header with the required field values.
+ * @param header The header to fill in
+ * @param type The type of record
+ * @param request_id The request id
+ * @param content_len The amount of content which follows the header
+ * @param padding_len The amount of padding which follows the content
+ *
+ * The header array must be at least AP_FCGI_HEADER_LEN bytes long.
+ */
+AP_DECLARE(void) ap_fcgi_fill_in_header(ap_fcgi_header *header,
+ unsigned char type,
+ apr_uint16_t request_id,
+ apr_uint16_t content_len,
+ unsigned char padding_len);
+
+/**
+ * Fill in a FastCGI begin request body with the required field values.
+ * @param brb The begin-request-body to fill in
+ * @param role AP_FCGI_RESPONDER or other roles
+ * @param flags 0 or a combination of flags like AP_FCGI_KEEP_CONN
+ */
+AP_DECLARE(void) ap_fcgi_fill_in_request_body(ap_fcgi_begin_request_body *brb,
+ int role,
+ unsigned char flags);
+
+/**
+ * Compute the buffer size needed to encode the next portion of
+ * the provided environment table.
+ * @param env The environment table
+ * @param maxlen The maximum buffer size allowable, capped at
+ * AP_FCGI_MAX_CONTENT_LEN.
+ * @param starting_elem On input, the next element of the table array
+ * to process in this FastCGI record. On output, the next element to
+ * process on the *next* FastCGI record.
+ * @return Size of buffer needed to encode the next part, or 0
+ * if no more can be encoded. When 0 is returned: If starting_elem
+ * has reached the end of the table array, all has been encoded;
+ * otherwise, the next envvar can't be encoded within the specified
+ * limit.
+ * @note If an envvar can't be encoded within the specified limit,
+ * the caller can log a warning and increment starting_elem and try
+ * again or increase the limit or fail, as appropriate for the module.
+ */
+AP_DECLARE(apr_size_t) ap_fcgi_encoded_env_len(apr_table_t *env,
+ apr_size_t maxlen,
+ int *starting_elem);
+
+/**
+ * Encode the next portion of the provided environment table using
+ * a buffer previously allocated.
+ * @param r The request, for logging
+ * @param env The environment table
+ * @param buffer A buffer to contain the encoded environment table
+ * @param buflen The length of the buffer, previously computed by
+ * ap_fcgi_encoded_env_len().
+ * @param starting_elem On input, the next element of the table array
+ * to process in this FastCGI record. On output, the next element to
+ * process on the *next* FastCGI record.
+ * @return APR_SUCCESS if a section could be encoded or APR_ENOSPC
+ * otherwise.
+ * @note The output starting_elem from ap_fcgi_encoded_env_len
+ * shouldn't be used as input to ap_fcgi_encode_env when building the
+ * same FastCGI record.
+ */
+AP_DECLARE(apr_status_t) ap_fcgi_encode_env(request_rec *r,
+ apr_table_t *env,
+ void *buffer,
+ apr_size_t buflen,
+ int *starting_elem);
+
+/**
+ * String forms for the value of the FCGI_ROLE envvar
+ */
+#define AP_FCGI_RESPONDER_STR "RESPONDER"
+#define AP_FCGI_AUTHORIZER_STR "AUTHORIZER"
+#define AP_FCGI_FILTER_STR "FILTER"
+
+/**
+ * FastCGI implementations that implement the AUTHORIZER role
+ * for Apache httpd and allow the application to participate in
+ * any of the Apache httpd AAA phases typically set the variable
+ * FCGI_APACHE_ROLE to one of these strings to indicate the
+ * specific AAA phase.
+ */
+#define AP_FCGI_APACHE_ROLE_AUTHENTICATOR_STR "AUTHENTICATOR"
+#define AP_FCGI_APACHE_ROLE_AUTHORIZER_STR "AUTHORIZER"
+#define AP_FCGI_APACHE_ROLE_ACCESS_CHECKER_STR "ACCESS_CHECKER"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !APACHE_UTIL_FCGI_H */
+/** @} */
View
@@ -569,6 +569,14 @@ SOURCE=.\server\util_expr_parse.c
# End Source File
# Begin Source File
+SOURCE=.\server\util_fcgi.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\include\util_fcgi.h
+# End Source File
+# Begin Source File
+
SOURCE=.\server\util_filter.c
# End Source File
# Begin Source File
View
@@ -7,7 +7,7 @@ SUBDIRS = mpm
LTLIBRARY_NAME = libmain.la
LTLIBRARY_SOURCES = \
- config.c log.c main.c vhost.c util.c \
+ config.c log.c main.c vhost.c util.c util_fcgi.c \
util_script.c util_md5.c util_cfgtree.c util_ebcdic.c util_time.c \
connection.c listen.c util_mutex.c mpm_common.c mpm_unix.c \
util_charset.c util_cookies.c util_debug.c util_xml.c \
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