mas01mj@584: 
mas01mj@584: #include <httpd.h>
mas01mj@584: #include <ap_config.h>
mas01mj@584: #include <http_config.h>
mas01mj@584: #include <http_protocol.h>
mas01mj@584: #include <apr_strings.h>
mas01mj@584: #include <librdf.h>
mas01mj@584: #include <apreq_module.h>
mas01mj@584: #include <apreq_parser.h>
mas01mj@584: #include <apreq_param.h>
mas01mj@584: #include "apreq2/apreq_module_apache2.h"
mas01mj@599: #include <rasqal.h>
mas01mj@584: 
mas01mj@600: #define BASE_URI "http://purl.org/ontology/af/"
mas01mj@600: #define JSON_URI "http://www.w3.org/2001/sw/DataAccess/json-sparql/"
mas01mj@600: #define SPARQL_URI "http://www.w3.org/TR/2006/WD-rdf-sparql-XMLres-20070614/"
mas01mj@584: 
mas01mj@584: static int log_out(void *user_data, librdf_log_message *message)
mas01mj@584: {
mas01mj@584: 	fprintf(stderr, "%s\n", librdf_log_message_message(message));
mas01mj@584: 	fflush(stderr);
mas01mj@584: 	return 1;
mas01mj@584: }
mas01mj@584: 
mas01mj@584: static int adb_handle_sparql_req(request_rec *r) {
mas01mj@584: 	if(strcmp(r->handler, "audiodb-sparql-handler") != 0) {
mas01mj@584: 		return DECLINED;
mas01mj@584: 	}
mas01mj@584: 
mas01mj@584: 	r->content_type = "text/plain";
mas01mj@584: 	r->status = OK;
mas01mj@584: 	r->status_line = "200 OK";
mas01mj@584: 
mas01mj@584: 	if(!r->args) {
mas01mj@584: 		r->args = "";
mas01mj@584: 	}
mas01mj@584: 
mas01mj@584: 	const apr_table_t *form_table;
mas01mj@584: 	apreq_handle_t *h = apreq_handle_apache2(r);
mas01mj@584: 	if(apreq_args(h, &form_table) != APR_SUCCESS)
mas01mj@584: 		return DECLINED;
mas01mj@584: 
mas01mj@600: 	const char *query_string = apr_table_get(form_table, "query");
mas01mj@600: 	const char *output = apr_table_get(form_table, "output");
mas01mj@600: 	if(!output)
mas01mj@600: 		output = "xml";
mas01mj@584: 
mas01mj@584: 	int rc = 0;
mas01mj@584: 	librdf_world* world = librdf_new_world();
mas01mj@584: 	librdf_world_open(world);
mas01mj@584: 	librdf_world_set_logger(world, NULL, log_out);
mas01mj@599: 	librdf_storage* storage = librdf_new_storage(world, "audiodb", "/tmp/test_database.adb", NULL);
mas01mj@584: 	if(!storage)
mas01mj@584: 	{
mas01mj@584: 		rc = 2;
mas01mj@584: 		goto error;
mas01mj@584: 	}
mas01mj@584: 
mas01mj@584: 	librdf_model *model;
mas01mj@584: 	if (!(model = librdf_new_model(world, storage, NULL)))
mas01mj@584: 	{
mas01mj@584: 		rc = 5;	
mas01mj@584: 		goto error;
mas01mj@584: 	}
mas01mj@584: 
mas01mj@584: 	librdf_query *query;
mas01mj@600: 	if (!(query = librdf_new_query(world, "sparql", NULL, (unsigned char*)query_string, NULL)))
mas01mj@584: 	{
mas01mj@584: 		rc = 3;
mas01mj@584: 		goto error;
mas01mj@584: 	}
mas01mj@584: 
mas01mj@584: 	librdf_query_results *results;
mas01mj@584: 	if (!(results = librdf_query_execute(query, model)))
mas01mj@584: 	{
mas01mj@584: 		rc = 4;
mas01mj@584: 		goto error;
mas01mj@584: 	}
mas01mj@584: 
mas01mj@599: 
mas01mj@600: 	librdf_uri *output_uri;
mas01mj@600: 
mas01mj@600: 	if(strcmp(output, "json") == 0)
mas01mj@600: 		output_uri = librdf_new_uri( world,(unsigned char *) JSON_URI );
mas01mj@600: 	else
mas01mj@600: 		output_uri = librdf_new_uri( world,(unsigned char *) SPARQL_URI );
mas01mj@600: 
mas01mj@600: 	const unsigned char* out = librdf_query_results_to_string(results, output_uri, librdf_new_uri(world, (unsigned char*) BASE_URI)); 
mas01mj@600: 	
mas01mj@600: 	librdf_free_uri(output_uri);
mas01mj@599: 	librdf_storage_close(storage);
mas01mj@599: 	librdf_free_storage(storage);
mas01mj@599: 	librdf_free_world(world);
mas01mj@599: 	ap_rprintf(r, out); 
mas01mj@584: 
mas01mj@584: 	rc = 0;
mas01mj@584: 	return r->status;
mas01mj@584: 
mas01mj@584: 	error:
mas01mj@584: 		ap_rprintf(r, "Fail %d", rc);
mas01mj@584: 		return OK;
mas01mj@584: }
mas01mj@584: 
mas01mj@584: static void mod_audiodb_register_hooks (apr_pool_t *p) {
mas01mj@584: 	ap_hook_handler(adb_handle_sparql_req, NULL, NULL, APR_HOOK_FIRST);
mas01mj@584: }
mas01mj@584: 
mas01mj@584: module AP_MODULE_DECLARE_DATA audiodb_module = {
mas01mj@584: 	STANDARD20_MODULE_STUFF,
mas01mj@584: 	NULL,
mas01mj@584: 	NULL,
mas01mj@584: 	NULL,
mas01mj@584: 	NULL,
mas01mj@584: 	NULL,
mas01mj@584: 	mod_audiodb_register_hooks,
mas01mj@584: };