JSON/File Loader for G-WAN

json_load.c

// ============================================================================
// This is a Servlet sample for the G-WAN Web Server (http://www.trustleap.com)
// ----------------------------------------------------------------------------
// json_load.c: example uses loadfile.c to load a json text file into the buffer
// Ronaldo Barbachano 4-6-12
// ----------------------------------------------------------------------------
#include "gwan.h" // G-WAN exported functions
#include <string.h>

int main(int argc, char *argv[])
{
	xbuf_t *reply = get_reply(argv);
	// use ctx incase you want to use another script to process the loaded json
	xbuf_ctx buf2;

	char *text=0, *record = 0, *jsonCall=0, str[1024];
	
	// maybe just parse the uri
	if( argc == 1){

		// we're using a ctx buffer (for some reason) Maybe because of the xbuf_frurl (which is basically curl!)
	   xbuf_init(&buf2);

	   // get directive .. probably error correct and return error status if this fails?
	   get_arg("id=", &record, argc, argv);

	   if(record==0){
		return 404;
		}

	   // build uri to call get_arg(id) using modified noheaders to return files from the filesystem
	   s_snprintf(str, 1023, "?loadfile.c&id=%s", record);

	   // get json file using local script and record, alternativly load from a char or where 
	   jsonCall = xbuf_frurl(&buf2, "localhost", 8080, HTTP_GET,str, 500, 0);

	   // import from text
	   jsn_t *import = jsn_frtext(buf2.ptr, "import"); 

	   text = jsn_totext(&buf2, import, 1); 

	   // 1:formatted form , show that we have  run jsn_totext properly
	   xbuf_xcat(reply, "<pre>%s</pre>", text);

	   // assuming this -should- be disabled if you are continuing to use the ctx?
	   xbuf_free(&buf2);
	   return 1;
	}
	return 404;
   	
}
// ============================================================================
// End of Source Code
// ============================================================================

loadfile.c

// ============================================================================
// This is a Servlet sample for the G-WAN Web Server (http://www.trustleap.com)
// ----------------------------------------------------------------------------
// loadfile.c:
//				Loads a file based on a GET query without headers, 
//				returns 404 if id is not found. Designed to be used like an api.
//				Check out json_load.c for an example of calling with  xbuf_frurl()								
//	Ronaldo Barbachano 4-6-2012				
// 				
// noheaders.c: 
				
//				build a complete HTTP reply -without any response header
//              (this useful to send a raw JSON reply for example)
//
//              Returning an INVALID HTTP status code in the 1-99 range 
//              (inclusive) will prevent G-WAN from injecting the missing
//              response HTTP Headers.
// ----------------------------------------------------------------------------
#include "gwan.h" // G-WAN exported functions

// ----------------------------------------------------------------------------
// imported functions:
//   get_reply(): get a pointer on the 'reply' dynamic buffer from the server
//    xbuf_cat(): formatted strcat() (a la printf) in a given dynamic buffer 
// ----------------------------------------------------------------------------

// pratice with this script and see if you cannot include it in others and make multiple call
int main(int argc, char *argv[])
{
	xbuf_t *reply = get_reply(argv);
	   
    xbuf_t f;
	
	char *file = 0, str[1024];
	char *wwwpath = (char*)get_env(argv, WWW_ROOT);
	
	if(argc==1){
	// get the id argument..
		get_arg("id=", &file, argc, argv);
		// build string path with wwwpath and s_snprintf, switch out 'json' with something else..
		if(file!=0){
			s_snprintf(str, 1023, "%s/json/%s", wwwpath, file);
	
		// init dynamic buffer
			xbuf_init(&f);
	
		// load file with assembled str
	    	xbuf_frfile(&f, str);
	
		// load succeeded?
		    if(f.len){                                       
		    	xbuf_ncat(reply,f.ptr, f.len);
		   	 	xbuf_free(&f);
				return 1;
			}
			xbuf_free(&f);
		}	
	}
	// return error because something went wrong (invalid 'id')
   	return 404;
}
// ============================================================================
// End of Source Code
// ============================================================================