OpenSRF/src/gateway/mod_ils_gateway.c

   1 #include "mod_ils_gateway.h"
   2 #include "http_log.h"
   3
   4 char* ils_gateway_config_file = NULL;
   5 char* ils_rest_gateway_config_file = NULL;
   6
   7 static const char* ils_gateway_set_config(cmd_parms *parms, void *config, const char *arg) {
   8         ils_gateway_config  *cfg;
   9         cfg = ap_get_module_config(parms->server->module_config, &ils_gateway_module);
  10         cfg->configfile = (char*) arg;
  11         ils_gateway_config_file = (char*) arg;
  12         return NULL;
  13 }
  14
  15 /* tell apache about our commands */
  16 static const command_rec ils_gateway_cmds[] = {
  17         AP_INIT_TAKE1( GATEWAY_CONFIG, ils_gateway_set_config, NULL, RSRC_CONF, "gateway config file"),
  18         {NULL}
  19 };
  20
  21 /* build the config object */
  22 static void* ils_gateway_create_config( apr_pool_t* p, server_rec* s) {
  23         ils_gateway_config* cfg = (ils_gateway_config*) apr_palloc(p, sizeof(ils_gateway_config));
  24         cfg->configfile = GATEWAY_DEFAULT_CONFIG;
  25         return (void*) cfg;
  26 }
  27
  28
  29 static void mod_ils_gateway_child_init(apr_pool_t *p, server_rec *s) {
  30
  31         char* cfg = ils_gateway_config_file;
  32         if( ! osrf_system_bootstrap_client( cfg, CONFIG_CONTEXT) ) {
  33                 osrfLogError("Unable to bootstrap client in gateway...");
  34                 return;
  35         }
  36         fprintf(stderr, "Bootstrapping %d\n", getpid() );
  37         fflush(stderr);
  38 }
  39
  40 static int mod_ils_gateway_method_handler (request_rec *r) {
  41
  42         /* make sure we're needed first thing*/
  43         if (strcmp(r->handler, MODULE_NAME ))
  44                 return DECLINED;
  45
  46         osrfLogSetAppname("osrf_json_gw");
  47
  48         apr_pool_t *p = r->pool;        /* memory pool */
  49         char* arg = r->args;                    /* url query string */
  50
  51         char* service                                   = NULL; /* service to connect to */
  52         char* method                                    = NULL; /* method to perform */
  53
  54         string_array* sarray                    = init_string_array(12); /* method parameters */
  55
  56         growing_buffer* buffer          = NULL; /* POST data */
  57         growing_buffer* tmp_buf         = NULL; /* temp buffer */
  58
  59         char* key                                               = NULL; /* query item name */
  60         char* val                                               = NULL; /* query item value */
  61
  62         jsonObject* response                    = jsonParseString("{ }");
  63         jsonObject* payload                     = jsonParseString("[ ]");
  64         jsonObjectSetKey(response, "payload", payload );
  65
  66         /* verify we are connected */
  67         if(!osrf_system_get_transport_client()) {
  68                 osrfLogError("Bootstrap Failed, no transport client");
  69                 return HTTP_INTERNAL_SERVER_ERROR;
  70         }
  71
  72         ap_set_content_type(r, "text/plain");
  73         osrfLogDebug("Apache request method: %s", r->method );
  74
  75         /* gather the post args and append them to the url query string */
  76         if( !strcmp(r->method,"POST") ) {
  77
  78                 ap_setup_client_block(r,REQUEST_CHUNKED_DECHUNK);
  79
  80                 if(! ap_should_client_block(r)) {
  81                         osrfLogWarning("No Post Body");
  82                         ap_rputs("null", r);
  83                         return OK;
  84                 }
  85
  86                 int BUFL = 1024;
  87                 char body[BUFL];
  88                 bzero(body, BUFL);
  89                 buffer = buffer_init(BUFL);
  90
  91                 while(ap_get_client_block(r, body, BUFL - 1 )) {
  92                         buffer_add( buffer, body );
  93                         bzero(body, BUFL);
  94                 }
  95
  96                 if( buffer->n_used < 1 ) {
  97                         osrfLogWarning("No Post Body");
  98                         ap_rputs("null", r);
  99                         return OK;
 100                 }
 101
 102                 if(arg && strlen(arg) > 0 ) {
 103                         tmp_buf = buffer_init(BUFL);
 104                         buffer_add(tmp_buf,arg);
 105                         buffer_add(tmp_buf,buffer->buf);
 106                         arg = (char*) apr_pstrdup(p, tmp_buf->buf);
 107                         buffer_free(tmp_buf);
 108                 } else {
 109                         arg = (char*) apr_pstrdup(p, buffer->buf);
 110                 }
 111                 buffer_free(buffer);
 112
 113         }
 114
 115         if( ! arg || strlen(arg) == 0 ) { /* we received no request */
 116                 osrfLogWarning("No Args");
 117                 ap_rputs("null", r);
 118                 return OK;
 119         }
 120
 121         osrfLogDebug("URL: %s", arg );
 122         ap_log_rerror( APLOG_MARK, APLOG_DEBUG, 0, r, "URL: %s", arg );
 123
 124         r->allowed |= (AP_METHOD_BIT << M_GET);
 125         r->allowed |= (AP_METHOD_BIT << M_POST);
 126
 127         while( arg && (val = ap_getword(p, (const char**) &arg, '&'))) {
 128
 129                 key = ap_getword(r->pool, (const char**) &val, '=');
 130                 if(!key || !key[0])
 131                         break;
 132
 133                 ap_unescape_url((char*)key);
 134                 ap_unescape_url((char*)val);
 135
 136                 if(!strcmp(key,"service"))
 137                         service = val;
 138
 139                 if(!strcmp(key,"method"))
 140                         method = val;
 141
 142                 if(!strcmp(key,"param"))
 143                         string_array_add(sarray, val);
 144
 145         }
 146
 147         osrfLogInfo("\r\nPerforming(%d):  service %s "
 148                         "| method %s |", getpid(), service, method );
 149
 150         int k;
 151         for( k = 0; k!= sarray->size; k++ ) {
 152                 osrfLogInfo( "param %s", string_array_get_string(sarray,k));
 153         }
 154
 155         osrf_app_session* session = osrf_app_client_session_init(service);
 156
 157         osrfLogDebug("session service: %s", session->remote_service );
 158
 159         int req_id = osrf_app_session_make_req( session, NULL, method, 1, sarray );
 160         string_array_destroy(sarray);
 161
 162         osrf_message* omsg = NULL;
 163
 164         while((omsg = osrf_app_session_request_recv( session, req_id, 60 ))) {
 165
 166                 jsonObjectSetKey(response, "status", jsonNewNumberObject(omsg->status_code));
 167
 168                 if( omsg->_result_content ) {
 169                         jsonObjectPush( payload, jsonObjectClone(omsg->_result_content));
 170
 171                 } else {
 172
 173                         if( omsg->status_code > 299 ) {
 174                                 char* s = omsg->status_name ? omsg->status_name : "Unknown Error";
 175                                 char* t = omsg->status_text ? omsg->status_text : "No Error Message";
 176                                 jsonObjectSetKey(response, "debug", jsonNewObject("\n\n%s:\n%s\n", s, t));
 177                                 osrfLogError( "Gateway received error: %s",
 178                                                 jsonObjectGetString(jsonObjectGetKey(response, "debug")));
 179                                 break;
 180                         }
 181                 }
 182
 183                 osrf_message_free(omsg);
 184                 omsg = NULL;
 185         }
 186
 187         char* content = jsonObjectToJSON(response);
 188         if(content) {
 189                 osrfLogInfo( "Gateway responding with:  %s", content );
 190                 ap_rputs(content,r);
 191                 free(content);
 192         }
 193         jsonObjectFree(response);
 194
 195         osrf_app_session_request_finish( session, req_id );
 196         osrfLogDebug("gateway processed message successfully");
 197
 198         osrf_app_session_destroy(session);
 199         return OK;
 200 }
 201
 202 static void mod_ils_gateway_register_hooks (apr_pool_t *p) {
 203         ap_hook_handler(mod_ils_gateway_method_handler, NULL, NULL, APR_HOOK_MIDDLE);
 204         ap_hook_child_init(mod_ils_gateway_child_init,NULL,NULL,APR_HOOK_MIDDLE);
 205 }
 206
 207
 208 module AP_MODULE_DECLARE_DATA ils_gateway_module = {
 209         STANDARD20_MODULE_STUFF,
 210         NULL,
 211         NULL,
 212         ils_gateway_create_config,
 213         NULL,
 214         ils_gateway_cmds,
 215         mod_ils_gateway_register_hooks,
 216 };
 217
 218
 219
 220