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/* convert an opml file to sfeedrc file */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <strings.h>
#include <expat.h> /* libexpat */
XML_Parser parser; /* expat XML parser state */
char * /* search for attr value by attr name in attributes list */
getattrvalue(const char **atts, const char *name) {
const char **attr = NULL, *key, *value;
if(!atts || !(*atts))
return NULL;
for(attr = atts; *attr; ) {
key = *(attr++);
value = *(attr++);
if(key && value && !strcasecmp(key, name))
return (char *)value;
}
return NULL;
}
void XMLCALL
xml_handler_start_element(void *data, const char *name, const char **atts) {
char *feedurl = NULL, *feedname = NULL, *basesiteurl = NULL;
if(!strcasecmp(name, "outline")) {
if(!(feedname = getattrvalue(atts, "text")) &&
!(feedname = getattrvalue(atts, "title")))
feedname = "unnamed";
if(!(basesiteurl = getattrvalue(atts, "htmlurl")))
basesiteurl = "";
if(!(feedurl = getattrvalue(atts, "xmlurl")))
feedurl = "";
printf("\tfeed \"%s\" \"%s\" \"%s\"\n", feedname, feedurl, basesiteurl);
}
}
void XMLCALL
xml_handler_end_element(void *data, const char *name) {
}
int /* parse XML from stream using setup parser, return 1 on success, 0 on failure. */
xml_parse_stream(XML_Parser parser, FILE *fp) {
char buffer[BUFSIZ];
int done = 0, len = 0;
while(!feof(fp)) {
len = fread(buffer, 1, sizeof(buffer), fp);
done = (feof(fp) || ferror(fp));
if(XML_Parse(parser, buffer, len, done) == XML_STATUS_ERROR && (len > 0)) {
if(XML_GetErrorCode(parser) == XML_ERROR_NO_ELEMENTS)
return 1; /* Ignore "no elements found" / empty document as an error */
fprintf(stderr, "sfeed_opml_import: error parsing xml %s at line %lu column %lu\n",
XML_ErrorString(XML_GetErrorCode(parser)), (unsigned long)XML_GetCurrentLineNumber(parser),
(unsigned long)XML_GetCurrentColumnNumber(parser));
return 0;
}
} while(!done);
return 1;
}
int main(void) {
int status;
if(!(parser = XML_ParserCreate("UTF-8"))) {
fputs("sfeed_opml_import: can't create parser", stderr);
exit(EXIT_FAILURE);
}
XML_SetElementHandler(parser, xml_handler_start_element, xml_handler_end_element);
fputs(
"# paths\n"
"# NOTE: make sure to uncomment all these if you change it.\n"
"#sfeedpath=\"$HOME/.sfeed\"\n"
"#sfeedfile=\"$sfeedpath/feeds\"\n"
"#sfeedfilenew=\"$sfeedfile.new\"\n"
"\n"
"# list of feeds to fetch:\n"
"feeds() {\n"
" # feed <name> <url> [encoding]\n", stdout);
status = xml_parse_stream(parser, stdin);
fputs("}\n", stdout);
XML_ParserFree(parser);
return status ? EXIT_SUCCESS : EXIT_FAILURE;
}
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