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/*
* Canonical XML implementation test program
* (http://www.w3.org/TR/2001/REC-xml-c14n-20010315)
*
* See Copyright for the status of this software.
*
* Author: Aleksey Sanin <aleksey@aleksey.com>
*/
#include "libxml.h"
#if defined(LIBXML_C14N_ENABLED) && defined(LIBXML_OUTPUT_ENABLED)
#include <stdio.h>
#include <string.h>
#ifndef STDOUT_FILENO
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#else
#define STDOUT_FILENO fileno(stdout)
#endif /* HAVE_UNISTD_H */
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/xpath.h>
#include <libxml/xpathInternals.h>
#include <libxml/c14n.h>
static void usage(const char *name) {
fprintf(stderr,
"Usage: %s <mode> <xml-file> [<xpath-expr>] [<inclusive-ns-list>]\n",
name);
fprintf(stderr, "where <mode> is one of following:\n");
fprintf(stderr,
"--with-comments \t XML file canonicalization v1.0 w comments \n");
fprintf(stderr,
"--without-comments \t XML file canonicalization v1.0 w/o comments\n");
fprintf(stderr,
"--1-1-with-comments \t XML file canonicalization v1.1 w comments\n");
fprintf(stderr,
"--1-1-without-comments \t XML file canonicalization v1.1 w/o comments\n");
fprintf(stderr,
"--exc-with-comments \t Exclusive XML file canonicalization v1.0 w comments\n");
fprintf(stderr,
"--exc-without-comments\t Exclusive XML file canonicalization v1.0 w/o comments\n");
}
static xmlXPathObjectPtr
load_xpath_expr (xmlDocPtr parent_doc, const char* filename);
static xmlChar **parse_list(xmlChar *str);
/* static void print_xpath_nodes(xmlNodeSetPtr nodes); */
static int
test_c14n(const char* xml_filename, int with_comments, int mode,
const char* xpath_filename, xmlChar **inclusive_namespaces) {
xmlDocPtr doc;
xmlXPathObjectPtr xpath = NULL;
xmlChar *result = NULL;
int ret;
/*
* build an XML tree from a the file; we need to add default
* attributes and resolve all character and entities references
*/
xmlLoadExtDtdDefaultValue = XML_DETECT_IDS | XML_COMPLETE_ATTRS;
xmlSubstituteEntitiesDefault(1);
doc = xmlReadFile(xml_filename, NULL, XML_PARSE_DTDATTR | XML_PARSE_NOENT);
if (doc == NULL) {
fprintf(stderr, "Error: unable to parse file \"%s\"\n", xml_filename);
return(-1);
}
/*
* Check the document is of the right kind
*/
if(xmlDocGetRootElement(doc) == NULL) {
fprintf(stderr,"Error: empty document for file \"%s\"\n", xml_filename);
xmlFreeDoc(doc);
return(-1);
}
/*
* load xpath file if specified
*/
if(xpath_filename) {
xpath = load_xpath_expr(doc, xpath_filename);
if(xpath == NULL) {
fprintf(stderr,"Error: unable to evaluate xpath expression\n");
xmlFreeDoc(doc);
return(-1);
}
}
/*
* Canonical form
*/
/* fprintf(stderr,"File \"%s\" loaded: start canonization\n", xml_filename); */
ret = xmlC14NDocDumpMemory(doc,
(xpath) ? xpath->nodesetval : NULL,
mode, inclusive_namespaces,
with_comments, &result);
if(ret >= 0) {
if(result != NULL) {
if (write(STDOUT_FILENO, result, ret) == -1) {
fprintf(stderr, "Can't write data\n");
}
xmlFree(result);
}
} else {
fprintf(stderr,"Error: failed to canonicalize XML file \"%s\" (ret=%d)\n", xml_filename, ret);
if(result != NULL) xmlFree(result);
xmlFreeDoc(doc);
return(-1);
}
/*
* Cleanup
*/
if(xpath != NULL) xmlXPathFreeObject(xpath);
xmlFreeDoc(doc);
return(ret);
}
int main(int argc, char **argv) {
int ret = -1;
/*
* Init libxml
*/
xmlInitParser();
LIBXML_TEST_VERSION
/*
* Parse command line and process file
*/
if( argc < 3 ) {
fprintf(stderr, "Error: wrong number of arguments.\n");
usage(argv[0]);
} else if(strcmp(argv[1], "--with-comments") == 0) {
ret = test_c14n(argv[2], 1, XML_C14N_1_0, (argc > 3) ? argv[3] : NULL, NULL);
} else if(strcmp(argv[1], "--without-comments") == 0) {
ret = test_c14n(argv[2], 0, XML_C14N_1_0, (argc > 3) ? argv[3] : NULL, NULL);
} else if(strcmp(argv[1], "--1-1-with-comments") == 0) {
ret = test_c14n(argv[2], 1, XML_C14N_1_1, (argc > 3) ? argv[3] : NULL, NULL);
} else if(strcmp(argv[1], "--1-1-without-comments") == 0) {
ret = test_c14n(argv[2], 0, XML_C14N_1_1, (argc > 3) ? argv[3] : NULL, NULL);
} else if(strcmp(argv[1], "--exc-with-comments") == 0) {
xmlChar **list;
/* load exclusive namespace from command line */
list = (argc > 4) ? parse_list((xmlChar *)argv[4]) : NULL;
ret = test_c14n(argv[2], 1, XML_C14N_EXCLUSIVE_1_0, (argc > 3) ? argv[3] : NULL, list);
if(list != NULL) xmlFree(list);
} else if(strcmp(argv[1], "--exc-without-comments") == 0) {
xmlChar **list;
/* load exclusive namespace from command line */
list = (argc > 4) ? parse_list((xmlChar *)argv[4]) : NULL;
ret = test_c14n(argv[2], 0, XML_C14N_EXCLUSIVE_1_0, (argc > 3) ? argv[3] : NULL, list);
if(list != NULL) xmlFree(list);
} else {
fprintf(stderr, "Error: bad option.\n");
usage(argv[0]);
}
/*
* Shutdown libxml
*/
xmlCleanupParser();
xmlMemoryDump();
return((ret >= 0) ? 0 : 1);
}
/*
* Macro used to grow the current buffer.
*/
#define growBufferReentrant() { \
buffer_size *= 2; \
buffer = (xmlChar **) \
xmlRealloc(buffer, buffer_size * sizeof(xmlChar*)); \
if (buffer == NULL) { \
perror("realloc failed"); \
return(NULL); \
} \
}
static xmlChar **
parse_list(xmlChar *str) {
xmlChar **buffer;
xmlChar **out = NULL;
int buffer_size = 0;
int len;
if(str == NULL) {
return(NULL);
}
len = xmlStrlen(str);
if((str[0] == '\'') && (str[len - 1] == '\'')) {
str[len - 1] = '\0';
str++;
}
/*
* allocate an translation buffer.
*/
buffer_size = 1000;
buffer = (xmlChar **) xmlMalloc(buffer_size * sizeof(xmlChar*));
if (buffer == NULL) {
perror("malloc failed");
return(NULL);
}
out = buffer;
while(*str != '\0') {
if (out - buffer > buffer_size - 10) {
int indx = out - buffer;
growBufferReentrant();
out = &buffer[indx];
}
(*out++) = str;
while(*str != ',' && *str != '\0') ++str;
if(*str == ',') *(str++) = '\0';
}
(*out) = NULL;
return buffer;
}
static xmlXPathObjectPtr
load_xpath_expr (xmlDocPtr parent_doc, const char* filename) {
xmlXPathObjectPtr xpath;
xmlDocPtr doc;
xmlChar *expr;
xmlXPathContextPtr ctx;
xmlNodePtr node;
xmlNsPtr ns;
/*
* load XPath expr as a file
*/
xmlLoadExtDtdDefaultValue = XML_DETECT_IDS | XML_COMPLETE_ATTRS;
xmlSubstituteEntitiesDefault(1);
doc = xmlReadFile(filename, NULL, XML_PARSE_DTDATTR | XML_PARSE_NOENT);
if (doc == NULL) {
fprintf(stderr, "Error: unable to parse file \"%s\"\n", filename);
return(NULL);
}
/*
* Check the document is of the right kind
*/
if(xmlDocGetRootElement(doc) == NULL) {
fprintf(stderr,"Error: empty document for file \"%s\"\n", filename);
xmlFreeDoc(doc);
return(NULL);
}
node = doc->children;
while(node != NULL && !xmlStrEqual(node->name, (const xmlChar *)"XPath")) {
node = node->next;
}
if(node == NULL) {
fprintf(stderr,"Error: XPath element expected in the file \"%s\"\n", filename);
xmlFreeDoc(doc);
return(NULL);
}
expr = xmlNodeGetContent(node);
if(expr == NULL) {
fprintf(stderr,"Error: XPath content element is NULL \"%s\"\n", filename);
xmlFreeDoc(doc);
return(NULL);
}
ctx = xmlXPathNewContext(parent_doc);
if(ctx == NULL) {
fprintf(stderr,"Error: unable to create new context\n");
xmlFree(expr);
xmlFreeDoc(doc);
return(NULL);
}
/*
* Register namespaces
*/
ns = node->nsDef;
while(ns != NULL) {
if(xmlXPathRegisterNs(ctx, ns->prefix, ns->href) != 0) {
fprintf(stderr,"Error: unable to register NS with prefix=\"%s\" and href=\"%s\"\n", ns->prefix, ns->href);
xmlFree(expr);
xmlXPathFreeContext(ctx);
xmlFreeDoc(doc);
return(NULL);
}
ns = ns->next;
}
/*
* Evaluate xpath
*/
xpath = xmlXPathEvalExpression(expr, ctx);
if(xpath == NULL) {
fprintf(stderr,"Error: unable to evaluate xpath expression\n");
xmlFree(expr);
xmlXPathFreeContext(ctx);
xmlFreeDoc(doc);
return(NULL);
}
/* print_xpath_nodes(xpath->nodesetval); */
xmlFree(expr);
xmlXPathFreeContext(ctx);
xmlFreeDoc(doc);
return(xpath);
}
/*
static void
print_xpath_nodes(xmlNodeSetPtr nodes) {
xmlNodePtr cur;
int i;
if(nodes == NULL ){
fprintf(stderr, "Error: no nodes set defined\n");
return;
}
fprintf(stderr, "Nodes Set:\n-----\n");
for(i = 0; i < nodes->nodeNr; ++i) {
if(nodes->nodeTab[i]->type == XML_NAMESPACE_DECL) {
xmlNsPtr ns;
ns = (xmlNsPtr)nodes->nodeTab[i];
cur = (xmlNodePtr)ns->next;
fprintf(stderr, "namespace \"%s\"=\"%s\" for node %s:%s\n",
ns->prefix, ns->href,
(cur->ns) ? cur->ns->prefix : BAD_CAST "", cur->name);
} else if(nodes->nodeTab[i]->type == XML_ELEMENT_NODE) {
cur = nodes->nodeTab[i];
fprintf(stderr, "element node \"%s:%s\"\n",
(cur->ns) ? cur->ns->prefix : BAD_CAST "", cur->name);
} else {
cur = nodes->nodeTab[i];
fprintf(stderr, "node \"%s\": type %d\n", cur->name, cur->type);
}
}
}
*/
#else
#include <stdio.h>
int main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) {
printf("%s : XPath/Canonicalization and output support not compiled in\n", argv[0]);
return(0);
}
#endif /* LIBXML_C14N_ENABLED */
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