mirror of
https://gitlab.gnome.org/GNOME/libxml2.git
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360 lines
8.8 KiB
C
360 lines
8.8 KiB
C
/*
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* Canonical XML implementation test program
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* (http://www.w3.org/TR/2001/REC-xml-c14n-20010315)
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*
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* See Copyright for the status of this software.
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*
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* Author: Aleksey Sanin <aleksey@aleksey.com>
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*/
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#include "libxml.h"
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#if defined(LIBXML_C14N_ENABLED)
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#include <stdio.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#include <libxml/xmlmemory.h>
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#include <libxml/parser.h>
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#include <libxml/xpath.h>
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#include <libxml/xpathInternals.h>
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#include <libxml/c14n.h>
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static void usage(const char *name) {
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fprintf(stderr,
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"Usage: %s <mode> <xml-file> [<xpath-expr>] [<inclusive-ns-list>]\n",
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name);
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fprintf(stderr, "where <mode> is one of following:\n");
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fprintf(stderr,
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"--with-comments \t XML file canonization w comments\n");
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fprintf(stderr,
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"--without-comments \t XML file canonization w/o comments\n");
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fprintf(stderr,
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"--exc-with-comments \t Exclusive XML file canonization w comments\n");
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fprintf(stderr,
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"--exc-without-comments\t Exclusive XML file canonization w/o comments\n");
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}
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static xmlXPathObjectPtr
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load_xpath_expr (xmlDocPtr parent_doc, const char* filename);
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static xmlChar **parse_list(xmlChar *str);
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static void print_xpath_nodes(xmlNodeSetPtr nodes);
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static int
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test_c14n(const char* xml_filename, int with_comments, int exclusive,
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const char* xpath_filename, xmlChar **inclusive_namespaces) {
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xmlDocPtr doc;
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xmlXPathObjectPtr xpath = NULL;
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xmlChar *result = NULL;
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int ret;
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/*
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* build an XML tree from a the file; we need to add default
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* attributes and resolve all character and entities references
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*/
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xmlLoadExtDtdDefaultValue = XML_DETECT_IDS | XML_COMPLETE_ATTRS;
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xmlSubstituteEntitiesDefault(1);
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doc = xmlParseFile(xml_filename);
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if (doc == NULL) {
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fprintf(stderr, "Error: unable to parse file \"%s\"\n", xml_filename);
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return(-1);
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}
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/*
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* Check the document is of the right kind
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*/
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if(xmlDocGetRootElement(doc) == NULL) {
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fprintf(stderr,"Error: empty document for file \"%s\"\n", xml_filename);
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xmlFreeDoc(doc);
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return(-1);
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}
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/*
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* load xpath file if specified
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*/
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if(xpath_filename) {
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xpath = load_xpath_expr(doc, xpath_filename);
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if(xpath == NULL) {
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fprintf(stderr,"Error: unable to evaluate xpath expression\n");
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xmlFreeDoc(doc);
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return(-1);
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}
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}
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/*
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* Canonical form
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*/
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/* fprintf(stderr,"File \"%s\" loaded: start canonization\n", xml_filename); */
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ret = xmlC14NDocDumpMemory(doc,
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(xpath) ? xpath->nodesetval : NULL,
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exclusive, inclusive_namespaces,
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with_comments, &result);
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if(ret >= 0) {
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if(result != NULL) {
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write(1, result, ret);
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xmlFree(result);
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}
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} else {
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fprintf(stderr,"Error: failed to canonicalize XML file \"%s\" (ret=%d)\n", xml_filename, ret);
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if(result != NULL) xmlFree(result);
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xmlFreeDoc(doc);
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return(-1);
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}
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/*
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* Cleanup
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*/
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if(xpath != NULL) xmlXPathFreeObject(xpath);
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xmlFreeDoc(doc);
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return(ret);
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}
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int main(int argc, char **argv) {
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int ret = -1;
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/*
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* Init libxml
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*/
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xmlInitParser();
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LIBXML_TEST_VERSION
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/*
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* Parse command line and process file
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*/
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if( argc < 3 ) {
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fprintf(stderr, "Error: wrong number of arguments.\n");
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usage(argv[0]);
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} else if(strcmp(argv[1], "--with-comments") == 0) {
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ret = test_c14n(argv[2], 1, 0, (argc > 3) ? argv[3] : NULL, NULL);
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} else if(strcmp(argv[1], "--without-comments") == 0) {
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ret = test_c14n(argv[2], 0, 0, (argc > 3) ? argv[3] : NULL, NULL);
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} else if(strcmp(argv[1], "--exc-with-comments") == 0) {
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xmlChar **list;
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/* load exclusive namespace from command line */
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list = (argc > 4) ? parse_list((xmlChar *)argv[4]) : NULL;
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ret = test_c14n(argv[2], 1, 1, (argc > 3) ? argv[3] : NULL, list);
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if(list != NULL) xmlFree(list);
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} else if(strcmp(argv[1], "--exc-without-comments") == 0) {
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xmlChar **list;
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/* load exclusive namespace from command line */
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list = (argc > 4) ? parse_list((xmlChar *)argv[4]) : NULL;
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ret = test_c14n(argv[2], 0, 1, (argc > 3) ? argv[3] : NULL, list);
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if(list != NULL) xmlFree(list);
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} else {
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fprintf(stderr, "Error: bad option.\n");
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usage(argv[0]);
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}
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/*
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* Shutdown libxml
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*/
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xmlCleanupParser();
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xmlMemoryDump();
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return((ret >= 0) ? 0 : 1);
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}
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/*
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* Macro used to grow the current buffer.
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*/
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#define growBufferReentrant() { \
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buffer_size *= 2; \
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buffer = (xmlChar **) \
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xmlRealloc(buffer, buffer_size * sizeof(xmlChar*)); \
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if (buffer == NULL) { \
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perror("realloc failed"); \
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return(NULL); \
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} \
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}
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static xmlChar **
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parse_list(xmlChar *str) {
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xmlChar **buffer;
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xmlChar **out = NULL;
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int buffer_size = 0;
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int len;
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if(str == NULL) {
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return(NULL);
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}
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len = xmlStrlen(str);
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if((str[0] == '\'') && (str[len - 1] == '\'')) {
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str[len - 1] = '\0';
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str++;
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len -= 2;
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}
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/*
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* allocate an translation buffer.
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*/
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buffer_size = 1000;
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buffer = (xmlChar **) xmlMalloc(buffer_size * sizeof(xmlChar*));
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if (buffer == NULL) {
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perror("malloc failed");
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return(NULL);
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}
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out = buffer;
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while(*str != '\0') {
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if (out - buffer > buffer_size - 10) {
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int indx = out - buffer;
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growBufferReentrant();
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out = &buffer[indx];
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}
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(*out++) = str;
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while(*str != ',' && *str != '\0') ++str;
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if(*str == ',') *(str++) = '\0';
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}
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(*out) = NULL;
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return buffer;
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}
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static xmlXPathObjectPtr
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load_xpath_expr (xmlDocPtr parent_doc, const char* filename) {
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xmlXPathObjectPtr xpath;
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xmlDocPtr doc;
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xmlChar *expr;
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xmlXPathContextPtr ctx;
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xmlNodePtr node;
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xmlNsPtr ns;
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/*
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* load XPath expr as a file
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*/
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xmlLoadExtDtdDefaultValue = XML_DETECT_IDS | XML_COMPLETE_ATTRS;
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xmlSubstituteEntitiesDefault(1);
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doc = xmlParseFile(filename);
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if (doc == NULL) {
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fprintf(stderr, "Error: unable to parse file \"%s\"\n", filename);
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return(NULL);
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}
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/*
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* Check the document is of the right kind
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*/
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if(xmlDocGetRootElement(doc) == NULL) {
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fprintf(stderr,"Error: empty document for file \"%s\"\n", filename);
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xmlFreeDoc(doc);
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return(NULL);
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}
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node = doc->children;
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while(node != NULL && !xmlStrEqual(node->name, (const xmlChar *)"XPath")) {
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node = node->next;
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}
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if(node == NULL) {
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fprintf(stderr,"Error: XPath element expected in the file \"%s\"\n", filename);
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xmlFreeDoc(doc);
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return(NULL);
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}
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expr = xmlNodeGetContent(node);
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if(expr == NULL) {
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fprintf(stderr,"Error: XPath content element is NULL \"%s\"\n", filename);
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xmlFreeDoc(doc);
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return(NULL);
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}
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ctx = xmlXPathNewContext(parent_doc);
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if(ctx == NULL) {
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fprintf(stderr,"Error: unable to create new context\n");
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xmlFree(expr);
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xmlFreeDoc(doc);
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return(NULL);
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}
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/*
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* Register namespaces
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*/
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ns = node->nsDef;
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while(ns != NULL) {
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if(xmlXPathRegisterNs(ctx, ns->prefix, ns->href) != 0) {
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fprintf(stderr,"Error: unable to register NS with prefix=\"%s\" and href=\"%s\"\n", ns->prefix, ns->href);
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xmlFree(expr);
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xmlXPathFreeContext(ctx);
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xmlFreeDoc(doc);
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return(NULL);
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}
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ns = ns->next;
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}
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/*
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* Evaluate xpath
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*/
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xpath = xmlXPathEvalExpression(expr, ctx);
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if(xpath == NULL) {
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fprintf(stderr,"Error: unable to evaluate xpath expression\n");
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xmlFree(expr);
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xmlXPathFreeContext(ctx);
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xmlFreeDoc(doc);
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return(NULL);
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}
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/* print_xpath_nodes(xpath->nodesetval); */
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xmlFree(expr);
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xmlXPathFreeContext(ctx);
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xmlFreeDoc(doc);
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return(xpath);
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}
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static void
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print_xpath_nodes(xmlNodeSetPtr nodes) {
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xmlNodePtr cur;
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int i;
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if(nodes == NULL ){
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fprintf(stderr, "Error: no nodes set defined\n");
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return;
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}
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fprintf(stderr, "Nodes Set:\n-----\n");
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for(i = 0; i < nodes->nodeNr; ++i) {
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if(nodes->nodeTab[i]->type == XML_NAMESPACE_DECL) {
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xmlNsPtr ns;
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ns = (xmlNsPtr)nodes->nodeTab[i];
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cur = (xmlNodePtr)ns->next;
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fprintf(stderr, "namespace \"%s\"=\"%s\" for node %s:%s\n",
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ns->prefix, ns->href,
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(cur->ns) ? cur->ns->prefix : BAD_CAST "", cur->name);
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} else if(nodes->nodeTab[i]->type == XML_ELEMENT_NODE) {
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cur = nodes->nodeTab[i];
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fprintf(stderr, "element node \"%s:%s\"\n",
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(cur->ns) ? cur->ns->prefix : BAD_CAST "", cur->name);
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} else {
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cur = nodes->nodeTab[i];
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fprintf(stderr, "node \"%s\": type %d\n", cur->name, cur->type);
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}
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}
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}
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#else
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#include <stdio.h>
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int main(int argc, char **argv) {
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printf("%s : XPath/Canonicalization support not compiled in\n", argv[0]);
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return(0);
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}
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#endif /* LIBXML_C14N_ENABLED */
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