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CMake/Utilities/cmxmlrpc/xmlrpc_serialize.c

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/* Copyright (C) 2001 by First Peer, Inc. All rights reserved.
**
** 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.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE 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 THE 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 "xmlrpc_config.h"
#include <stddef.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "xmlrpc.h"
#include "xmlrpc_int.h"
#define CRLF "\015\012"
#define SMALL_BUFFER_SZ (128)
#define XML_PROLOGUE "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"CRLF
/*=========================================================================
** format_out
**=========================================================================
** A lightweight print routine for use with various serialization
** functions. Only use this routine for printing small objects--it uses
** a fixed-size internal buffer and returns an error on overflow.
** In particular, do NOT use this routine to print XML-RPC string values!
*/
static void
format_out(xmlrpc_env *env,
xmlrpc_mem_block *output,
char *format_string,
...) {
va_list args;
char buffer[SMALL_BUFFER_SZ];
int count;
XMLRPC_ASSERT_ENV_OK(env);
va_start(args, format_string);
/* We assume that this function is present and works correctly. Right. */
count = vsnprintf(buffer, SMALL_BUFFER_SZ, format_string, args);
/* Old C libraries return -1 if vsnprintf overflows its buffer.
** New C libraries return the number of characters which *would* have
** been printed if the error did not occur. This is impressively vile.
** Thank the C99 committee for this bright idea. But wait! We also
** need to keep track of the trailing NULL. */
if (count < 0 || count >= (SMALL_BUFFER_SZ - 1))
XMLRPC_FAIL(env, XMLRPC_INTERNAL_ERROR,
"format_out overflowed internal buffer");
/* Append our new data to our output. */
XMLRPC_TYPED_MEM_BLOCK_APPEND(char, env, output, buffer, count);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
va_end(args);
}
/*=========================================================================
** Warnings About Invalid UTF-8
**=========================================================================
** We claim to send UTF-8 data to the network. But we rely on application
** programs to pass us correctly-formed UTF-8 data, which is very naive
** and optimistic.
**
** In debudding mode, we call this routine to issue dire-sounding
** warnings. For the sake of safety, this routine never exits the
** program or does anything else drastic.
**
** This routine almost certainly slows down our output.
*/
#if !defined NDEBUG && defined HAVE_UNICODE_WCHAR
static void
sanity_check_utf8(const char * const str,
size_t const len) {
xmlrpc_env env;
xmlrpc_env_init(&env);
xmlrpc_validate_utf8(&env, str, len);
if (env.fault_occurred)
fprintf(stderr, "*** xmlrpc-c WARNING ***: %s (%s)\n",
"Application sending corrupted UTF-8 data to network",
env.fault_string);
xmlrpc_env_clean(&env);
}
#endif
/*=========================================================================
** Escaping Strings
**=========================================================================
*/
static xmlrpc_mem_block *
escape_string(xmlrpc_env * const env,
const char * const str,
size_t const len) {
xmlrpc_mem_block *retval;
size_t i, needed;
char *out;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT(str != NULL);
/* Sanity-check this string before we print it. */
#if !defined NDEBUG && defined HAVE_UNICODE_WCHAR
sanity_check_utf8(str, len);
#endif
/* Calculate the amount of space we'll need. */
needed = 0;
for (i = 0; i < len; i++) {
if (str[i] == '<')
needed += 4; /* &lt; */
else if (str[i] == '>')
needed += 4; /* &gt; */
else if (str[i] == '&')
needed += 5; /* &amp; */
else
needed++;
}
/* Allocate our memory block. */
retval = XMLRPC_TYPED_MEM_BLOCK_NEW(char, env, needed);
XMLRPC_FAIL_IF_FAULT(env);
/* Copy over the newly-allocated data. */
out = XMLRPC_TYPED_MEM_BLOCK_CONTENTS(char, retval);
for (i = 0; i < len; i++) {
if (str[i] == '<') {
*out++ = '&';
*out++ = 'l';
*out++ = 't';
*out++ = ';';
} else if (str[i] == '>') {
*out++ = '&';
*out++ = 'g';
*out++ = 't';
*out++ = ';';
} else if (str[i] == '&') {
*out++ = '&';
*out++ = 'a';
*out++ = 'm';
*out++ = 'p';
*out++ = ';';
} else {
*out++ = str[i];
}
}
cleanup:
if (env->fault_occurred) {
if (retval)
XMLRPC_TYPED_MEM_BLOCK_FREE(char, retval);
retval = NULL;
}
return retval;
}
static xmlrpc_mem_block*
escape_block (xmlrpc_env *env,
xmlrpc_mem_block *block) {
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT(block != NULL);
return escape_string(env,
XMLRPC_TYPED_MEM_BLOCK_CONTENTS(char, block),
XMLRPC_TYPED_MEM_BLOCK_SIZE(char, block));
}
/*=========================================================================
** xmlrpc_serialize_string_data
**=========================================================================
** Escape and print the contents of a string.
*/
static void
xmlrpc_serialize_string_data(xmlrpc_env *env,
xmlrpc_mem_block *output,
xmlrpc_value *string) {
xmlrpc_mem_block *escaped;
char *contents;
size_t size;
/* Since this routine can only be called internally, we only need
** an assertion here, not a runtime type check.
** XXX - Temporarily disabled because we're using this code to
** print <dateTime.iso8601> values as well. */
/* XMLRPC_ASSERT(string->_type == XMLRPC_TYPE_STRING); */
/* Escape any '&' and '<' characters in the string. */
escaped = escape_block(env, &string->_block);
XMLRPC_FAIL_IF_FAULT(env);
contents = XMLRPC_TYPED_MEM_BLOCK_CONTENTS(char, escaped);
size = XMLRPC_TYPED_MEM_BLOCK_SIZE(char, escaped) - 1;
/* Print the string. */
XMLRPC_TYPED_MEM_BLOCK_APPEND(char, env, output, contents, size);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
if (escaped)
XMLRPC_TYPED_MEM_BLOCK_FREE(char, escaped);
}
/*=========================================================================
** xmlrpc_serialize_base64_data
**=========================================================================
** Print the contents of a memory block as well-formed Base64 data.
*/
static void
xmlrpc_serialize_base64_data (xmlrpc_env *env,
xmlrpc_mem_block *output,
unsigned char* data, size_t len) {
xmlrpc_mem_block *encoded;
unsigned char *contents;
size_t size;
/* Encode the data. */
encoded = xmlrpc_base64_encode_without_newlines(env, data, len);
XMLRPC_FAIL_IF_FAULT(env);
contents = XMLRPC_TYPED_MEM_BLOCK_CONTENTS(unsigned char, encoded);
size = XMLRPC_TYPED_MEM_BLOCK_SIZE(unsigned char, encoded);
/* Print the data. */
XMLRPC_TYPED_MEM_BLOCK_APPEND(char, env, output, contents, size);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
if (encoded)
XMLRPC_TYPED_MEM_BLOCK_FREE(char, encoded);
}
/*=========================================================================
** xmlrpc_serialize_struct
**=========================================================================
** Dump the contents of a struct.
*/
static void
xmlrpc_serialize_struct(xmlrpc_env *env,
xmlrpc_mem_block *output,
xmlrpc_value *strct) {
size_t size;
size_t i;
xmlrpc_value *key, *value;
format_out(env, output, "<struct>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
size = xmlrpc_struct_size(env, strct);
XMLRPC_FAIL_IF_FAULT(env);
for (i = 0; i < size; i++) {
xmlrpc_struct_get_key_and_value(env, strct, (int)i, &key, &value);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "<member><name>");
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_serialize_string_data(env, output, key);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "</name>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_serialize_value(env, output, value);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "</member>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
}
format_out(env, output, "</struct>");
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
return;
}
/*=========================================================================
** xmlrpc_serialize_value
**=========================================================================
** Dump a value in the appropriate fashion.
*/
void
xmlrpc_serialize_value(xmlrpc_env *env,
xmlrpc_mem_block *output,
xmlrpc_value *value) {
xmlrpc_value *item;
size_t size;
unsigned char* contents;
size_t i;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT(output != NULL);
XMLRPC_ASSERT_VALUE_OK(value);
/* Print our ubiquitous header. */
format_out(env, output, "<value>");
XMLRPC_FAIL_IF_FAULT(env);
switch (value->_type) {
case XMLRPC_TYPE_INT:
/* XXX - We assume that '%i' is the appropriate format specifier
** for an xmlrpc_int32 value. We should add some test cases to
** make sure this works. */
format_out(env, output, "<i4>%i</i4>", value->_value.i);
break;
case XMLRPC_TYPE_BOOL:
/* XXX - We assume that '%i' is the appropriate format specifier
** for an xmlrpc_bool value. */
format_out(env, output, "<boolean>%i</boolean>",
(value->_value.b) ? 1 : 0);
break;
case XMLRPC_TYPE_DOUBLE:
/* We must output a number of the form [+-]?\d*.\d*. */
format_out(env, output, "<double>%.17g</double>", value->_value.d);
break;
case XMLRPC_TYPE_STRING:
format_out(env, output, "<string>");
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_serialize_string_data(env, output, value);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "</string>");
break;
case XMLRPC_TYPE_ARRAY:
format_out(env, output, "<array><data>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
/* Serialize each item. */
size = xmlrpc_array_size(env, value);
XMLRPC_FAIL_IF_FAULT(env);
for (i = 0; i < size; i++) {
item = xmlrpc_array_get_item(env, value, (int)i);
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_serialize_value(env, output, item);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, CRLF);
XMLRPC_FAIL_IF_FAULT(env);
}
format_out(env, output, "</data></array>");
break;
case XMLRPC_TYPE_STRUCT:
xmlrpc_serialize_struct(env, output, value);
break;
case XMLRPC_TYPE_BASE64:
format_out(env, output, "<base64>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
contents = XMLRPC_TYPED_MEM_BLOCK_CONTENTS(unsigned char,
&value->_block);
size = XMLRPC_TYPED_MEM_BLOCK_SIZE(unsigned char, &value->_block);
xmlrpc_serialize_base64_data(env, output, contents, size);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "</base64>");
break;
case XMLRPC_TYPE_DATETIME:
format_out(env, output, "<dateTime.iso8601>");
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_serialize_string_data(env, output, value);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "</dateTime.iso8601>");
break;
case XMLRPC_TYPE_C_PTR:
xmlrpc_env_set_fault_formatted(
env, XMLRPC_INTERNAL_ERROR,
"Tried to serialize a C pointer value.");
break;
case XMLRPC_TYPE_DEAD:
xmlrpc_env_set_fault_formatted(
env, XMLRPC_INTERNAL_ERROR,
"Tried to serialize a deaad value.");
break;
default:
xmlrpc_env_set_fault_formatted(
env, XMLRPC_INTERNAL_ERROR,
"Invalid xmlrpc_value type: %d", value->_type);
}
XMLRPC_FAIL_IF_FAULT(env);
/* Print our ubiquitous footer. */
format_out(env, output, "</value>");
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
return;
}
/*=========================================================================
** xmlrpc_serialize_params
**=========================================================================
** Serialize a list as a set of parameters.
*/
void
xmlrpc_serialize_params(xmlrpc_env *env,
xmlrpc_mem_block *output,
xmlrpc_value *param_array) {
size_t size, i;
xmlrpc_value *item;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT(output != NULL);
XMLRPC_ASSERT_VALUE_OK(param_array);
format_out(env, output, "<params>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
/* Dump each parameter. */
size = xmlrpc_array_size(env, param_array);
XMLRPC_FAIL_IF_FAULT(env);
for (i = 0; i < size; i++) {
format_out(env, output, "<param>");
XMLRPC_FAIL_IF_FAULT(env);
item = xmlrpc_array_get_item(env, param_array, (int)i);
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_serialize_value(env, output, item);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "</param>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
}
format_out(env, output, "</params>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
return;
}
/*=========================================================================
** xmlrpc_serialize_call
**=========================================================================
** Serialize an XML-RPC call.
*/
void
xmlrpc_serialize_call(xmlrpc_env * const env,
xmlrpc_mem_block * const output,
const char * const method_name,
xmlrpc_value * const param_array) {
xmlrpc_mem_block *escaped;
char *contents;
size_t size;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT(output != NULL);
XMLRPC_ASSERT(method_name != NULL);
XMLRPC_ASSERT_VALUE_OK(param_array);
/* Set up our error-handling preconditions. */
escaped = NULL;
/* Dump our header. */
format_out(env, output, XML_PROLOGUE);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "<methodCall>"CRLF"<methodName>");
XMLRPC_FAIL_IF_FAULT(env);
/* Dump the method name. */
escaped = escape_string(env, method_name, strlen(method_name));
XMLRPC_FAIL_IF_FAULT(env);
contents = XMLRPC_TYPED_MEM_BLOCK_CONTENTS(char, escaped);
size = XMLRPC_TYPED_MEM_BLOCK_SIZE(char, escaped);
XMLRPC_TYPED_MEM_BLOCK_APPEND(char, env, output, contents, size);
XMLRPC_FAIL_IF_FAULT(env);
/* Dump our parameters and footer. */
format_out(env, output, "</methodName>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_serialize_params(env, output, param_array);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "</methodCall>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
if (escaped)
xmlrpc_mem_block_free(escaped);
}
/*=========================================================================
** xmlrpc_serialize_response
**=========================================================================
** Serialize the (non-fault) response to an XML-RPC call.
*/
void
xmlrpc_serialize_response (xmlrpc_env *env,
xmlrpc_mem_block *output,
xmlrpc_value *value) {
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT(output != NULL);
XMLRPC_ASSERT_VALUE_OK(value);
format_out(env, output, XML_PROLOGUE);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "<methodResponse>"CRLF"<params>"CRLF"<param>");
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_serialize_value(env, output, value);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output,
"</param>"CRLF"</params>"CRLF"</methodResponse>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
return;
}
/*=========================================================================
** xmlrpc_serialize_fault
**=========================================================================
** Serialize an XML-RPC fault.
**
** If this function fails, it will set up the first env argument. You'll
** need to take some other drastic action to produce a serialized fault
** of your own. (This function should only fail in an out-of-memory
** situation, AFAIK.)
*/
void
xmlrpc_serialize_fault(xmlrpc_env *env,
xmlrpc_mem_block *output,
xmlrpc_env *fault) {
xmlrpc_value *strct;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT(output != NULL);
XMLRPC_ASSERT(fault != NULL && fault->fault_occurred);
/* Build a fault structure. */
strct = xmlrpc_build_value(env, "{s:i,s:s}",
"faultCode", (xmlrpc_int32) fault->fault_code,
"faultString", fault->fault_string);
XMLRPC_FAIL_IF_FAULT(env);
/* Output our header. */
format_out(env, output, XML_PROLOGUE);
XMLRPC_FAIL_IF_FAULT(env);
format_out(env, output, "<methodResponse>"CRLF"<fault>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
/* Serialize our fault structure. */
xmlrpc_serialize_value(env, output, strct);
XMLRPC_FAIL_IF_FAULT(env);
/* Output our footer. */
format_out(env, output, CRLF"</fault>"CRLF"</methodResponse>"CRLF);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
if (strct)
xmlrpc_DECREF(strct);
}
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