ngrest returns error while running as apache web server module, but works fine as a standalone module

[raadiy]

Hi Dmitry,

I see the following error while running NGREST as an apache webserver module:

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W/14-04-2022 00:19:15.366 ngrest_server.cpp:331 ngrest_server_dispatch: in Json::Value::operator: requires arrayValue

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But, I do not get this error while running it with the inbuilt httpd server that comes with ngrest. Can you please take a look and suggest.

Thanks Raajesh

[loentar]

Hi, probably request got corrupted before going to json parser.

Try to enable module logging by setting NGREST_MOD_DEBUG=1

The simplest method is to add #define NGREST_MOD_DEBUG 1 right in ngrest_server.h after include.

then rebuild ngrest and check for /tmp/ngrest_debug_*.log logs

[raadiy]

Hi,

With NGREST_MOD_DEBUG enabled, the following are the logs. I doubted that the issue could be in the patchHandler that I had written, but ruled that out since the same works fine with the inbuilt ngrest httpd server. There is something different in the flow via the apache module :

====cat ngrest_debug_78267.log====

p78267 t1223846208; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[182]: ngrest_register_hooks p78267 t1223846208; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[187]: ngrest_set_ngrest_services_path: Using ngrest services path: [/test/node/lib/ngrest_srv] p78267 t1223846208; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[195]: ngrest_set_ngrest_filters_path: Using ngrest filters path: [/test/node/lib/ngrest_filter] p78267 t1223846208; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[161]: mod_ngrest_shutdown p78267 t1223846208; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[182]: ngrest_register_hooks p78267 t1223846208; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[187]: ngrest_set_ngrest_services_path: Using ngrest services path: [/test/node/lib/ngrest_srv] p78267 t1223846208; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[195]: ngrest_set_ngrest_filters_path: Using ngrest filters path: [/test/node/lib/ngrest_filter] p78269 t645842688; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[112]: mod_ngrest_handler p78269 t645842688; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[121]: mod_ngrest_handler: server startup: #0: OK p78269 t645842688; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[135]: mod_ngrest_handler: Dispatching request p78269 t645842688; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[63]: mod_ngrest_read_client_callback: REMAINING: 0 / 1232 p78269 t645842688; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[64]: mod_ngrest_read_client_callback: res: 1232 p78269 t645842688; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[86]: mod_ngrest_write_client_callback: response size: 59 p78269 t645842688; /home/tester/.ngrest/ngrest/modules/apache2/src/mod_ngrest.c[153]: mod_ngrest_handler

====cat ngrest_78269.log====

D/15-04-2022 02:31:22.016 Deployment.cpp:84 deploy: Deploying service library: /test/node/lib/ngrest_srv/serverstatus.so... D/15-04-2022 02:31:22.019 Deployment.cpp:120 deployStatic: Deploying service group name: ngrest D/15-04-2022 02:31:22.019 ServiceDispatcher.cpp:260 registerService: Registering service ngrest.ServerStatus V/15-04-2022 02:31:22.019 ServiceDispatcher.cpp:291 registerService: Registering resource: GET /ngrest/filters V/15-04-2022 02:31:22.019 ServiceDispatcher.cpp:291 registerService: Registering resource: GET /ngrest/services V/15-04-2022 02:31:22.019 ServiceDispatcher.cpp:291 registerService: Registering resource: GET /ngrest/service/{name} V/15-04-2022 02:31:22.019 ServiceDispatcher.cpp:291 registerService: Registering resource: GET /ngrest/operation/{serviceName}/{operationName} D/15-04-2022 02:31:22.019 ServiceDispatcher.cpp:325 registerService: Service ngrest.ServerStatus has been registered D/15-04-2022 02:31:22.019 Deployment.cpp:84 deploy: Deploying service library: /test/node/lib/ngrest_srv/favicon.so... D/15-04-2022 02:31:22.020 Deployment.cpp:120 deployStatic: Deploying service group name: ngrest D/15-04-2022 02:31:22.020 ServiceDispatcher.cpp:260 registerService: Registering service ngrest.Favicon V/15-04-2022 02:31:22.020 ServiceDispatcher.cpp:291 registerService: Registering resource: GET /favicon.ico/ D/15-04-2022 02:31:22.020 ServiceDispatcher.cpp:325 registerService: Service ngrest.Favicon has been registered D/15-04-2022 02:31:22.020 Deployment.cpp:84 deploy: Deploying service library: /test/node/lib/ngrest_srv/snsres_svr.so... D/15-04-2022 02:31:22.033 Deployment.cpp:120 deployStatic: Deploying service group name: D/15-04-2022 02:31:22.033 ServiceDispatcher.cpp:260 registerService: Registering service snsres_svr V/15-04-2022 02:31:22.033 ServiceDispatcher.cpp:291 registerService: Registering resource: GET /testEndPoint/{arg1} V/15-04-2022 02:31:22.033 ServiceDispatcher.cpp:291 registerService: Registering resource: PATCH /testEndPoint/ V/15-04-2022 02:31:22.033 ServiceDispatcher.cpp:291 registerService: Registering resource: POST /testEndPoint/ D/15-04-2022 02:31:22.033 ServiceDispatcher.cpp:325 registerService: Service snsres_svr has been registered D/15-04-2022 02:31:22.033 FilterDeployment.cpp:82 deploy: Deploying filter library: /test/node/lib/ngrest_filter/ngrestscmwifilter.so... D/15-04-2022 02:31:22.034 FilterDeployment.cpp:118 deployStatic: Deploying filter group: ScmWiFilterGroup W/15-04-2022 02:31:22.034 ngrest_server.cpp:307 ngrest_server_dispatch: CHGD00 before engine.dispatchMessage D/15-04-2022 02:31:22.034 ServiceDispatcher.cpp:360 dispatchMessage: Dispatching message /testEndPoint D/15-04-2022 02:31:22.034 ServiceDispatcher.cpp:380 dispatchMessage: Invoking service operation snsres_svr/patchHandler W/15-04-2022 02:31:22.034 ngrest_server.cpp:355 ngrest_server_dispatch: in Json::Value::operator: requires arrayValue

[loentar]

I think you should log the whole body of request you received in your patchHandler, . Probably it's truncated..

[raadiy]

Thank you... my apologies, I found that it was an error in the test database that I had setup. Thanks again.