OpenSRF/src/c-apps/osrf_math.c

   1 #include "opensrf/osrf_app_session.h"
   2 #include "opensrf/osrf_application.h"
   3 #include "objson/object.h"
   4 #include "opensrf/osrf_log.h"
   5
   6 #define MODULENAME "opensrf.math"
   7
   8 int osrfAppInitialize();
   9 int osrfAppChildInit();
  10 int osrfMathRun( osrfMethodContext* );
  11
  12
  13 int osrfAppInitialize() {
  14         osrfLogInit(MODULENAME);
  15
  16         osrfAppRegisterMethod(
  17                         MODULENAME,
  18                         "add",
  19                         "osrfMathRun",
  20                         "Addss two numbers",
  21                         "( num1, num2 )", 2 );
  22
  23         osrfAppRegisterMethod(
  24                         MODULENAME,
  25                         "sub",
  26                         "osrfMathRun",
  27                         "Subtracts two numbers",
  28                         "( num1, num2 )", 2 );
  29
  30         osrfAppRegisterMethod(
  31                         MODULENAME,
  32                         "mult",
  33                         "osrfMathRun",
  34                         "Multiplies two numbers",
  35                         "( num1, num2 )", 2 );
  36
  37         osrfAppRegisterMethod(
  38                         MODULENAME,
  39                         "div",
  40                         "osrfMathRun",
  41                         "Divides two numbers",
  42                         "( num1, num2 )", 2 );
  43
  44         return 0;
  45 }
  46
  47 int osrfAppChildInit() {
  48         return 0;
  49 }
  50
  51 int osrfMathRun( osrfMethodContext* ctx ) {
  52
  53         OSRF_METHOD_VERIFY_CONTEXT(ctx); /* see osrf_application.h */
  54
  55         osrfLog( OSRF_DEBUG, "Running opensrf.math %s", ctx->method->name );
  56
  57         /* collect the request params */
  58         jsonObject* x = jsonObjectGetIndex(ctx->params, 0);
  59         jsonObject* y = jsonObjectGetIndex(ctx->params, 1);
  60
  61         if( x && y ) {
  62
  63                 /* pull out the params as strings since they may be either
  64                         strings or numbers depending on the client */
  65                 char* a = jsonObjectToSimpleString(x);
  66                 char* b = jsonObjectToSimpleString(y);
  67
  68                 if( a && b ) {
  69
  70                         /* construct a new params object to send to dbmath */
  71                         jsonObject* newParams = jsonParseString( "[ %s, %s ]", a, b );
  72                         free(a); free(b);
  73
  74                         /* connect to db math */
  75                         osrfAppSession* ses = osrfAppSessionClientInit("opensrf.dbmath");
  76
  77                         /* dbmath uses the same method names that math does */
  78                         int req_id = osrfAppSessionMakeRequest( ses, newParams, ctx->method->name, 1, NULL );
  79                         osrfMessage* omsg = osrfAppSessionRequestRecv( ses, req_id, 60 );
  80
  81                         if(omsg) {
  82                                 /* return dbmath's response to the user */
  83                                 osrfAppRequestRespondComplete( ctx->session, ctx->request, osrfMessageGetResult(omsg) );
  84                                 osrfMessageFree(omsg);
  85                                 osrfAppSessionFree(ses);
  86                                 return 0;
  87                         }
  88
  89                         osrfAppSessionFree(ses);
  90                 }
  91         }
  92
  93         return -1;
  94 }
  95
  96
  97