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Posted to c-user@axis.apache.org by Pankaj Kharwal <Pa...@kf.se> on 2011/11/07 10:44:21 UTC
Problems with Axis2C samples
Hi All,
My work environment is an x86_64 Red Hat Linux machine. My primary goal is to expose certain in-house applications (written in C/C++) as webservices. After searching for avaiable options, I thought to try out AXIS2C. So this is the first time I acquainted myself with AXIS2C. The sequence of events that I followed is as under:
1. I downloaded AXIS2C version 1.6, configured/built the engine and it works just fine.
2. To get an initial confidence with AXIS2C, I tried accessing the samples. The 'Hello' sample application works perfect.
3. I tried further with the calculator sample (that comes with the distribution), but it does not seem to work.
4. I discarded the entire code and generated the stubs from Calculator.wsdl which comes with the AXIS2C distribution. I used the command: "./WSDL2C.sh -uri /usr/pkdir/axis/services/Calculator/Calculator.wsdl -ss -sd -d none -f -o /usr/pkdir/axis/services/Calculator". I get axis2_skel_Calculator.c, axis2_skel_Calculator.h, axis2_svc_skel_Calculator.c and service.xml files.
5. After this I implemented the logic (only for addition part) in axiom_node_t* axis2_skel_Calculator_add() function in axis2_skel_Calculator.c. The logic corresponds to the one given in the sample code that comes with AXIS2C distribution and I have mentioned it below.
6. Then I compiled the service stubs using the command: 'gcc -shared -olibCalculator.so -I$AXIS2C_HOME/include/axis2-1.6.0/ -L$AXIS2C_HOME/lib -laxutil -laxis2_axiom -laxis2_parser -laxis2_engine -lpthread -laxis2_http_sender -laxis2_http_receiver -fPIC *.c'. And it yields following errors:
a. axiom_soap_envelope_t undeclared (first use in this function)
b. req_soap_env undeclared (first use in this function)
c. axiom_soap_header_t undeclared (first use in this function)
d. req_soap_header undeclared (first use in this function)
e. res_soap_env undeclared (first use in this function)
f. res_soap_header undeclared (first use in this function)
7. After including axis2_svc_client.h in axis2_svc_skel_Calculator.c file, the code compiled perfecly
8. Then I fired a request using soapUI, but I always get 'Invalid XML format in request'. The problem is that "param1_node = axiom_node_get_first_child(_add, env);" is always set to NULL (see the code given below).
9. I tried printing the nodes using axiom_node_to_string() function and here is the exact output at the console:
NODE _add = <typ:add xmlns:typ="http://ws.apache.org/axis2/services/Calculator/types">
<param_1>11</param_1>
<param_2>22</param_2>
</typ:add>
NODE param1_node =
<param_1>11</param_1>
Calculator service ERROR: invalid XML in request
NOTE: kindly note the big space (dont know if its a newline or a white space) in param1_node.
10. When I used GDB to know about the 'env' and '_add' nodes:
(gdb) p *env
$2 = {allocator = , error = , log = , log_enabled = 1, thread_pool = , ref = 9}
(gdb) p *_add
$3 = {om_doc = , builder = , parent = , prev_sibling = , next_sibling = , first_child = , last_child = , node_type = AXIOM_ELEMENT, done = 1,
data_element = }
NOTE: Only a few fields are populated in env and _add structures.
11. GDB also showed something in between like this (although I dont know which variable is it; GDB prints this by itself without any print command from me):
Value returned is $1 =
(axis2_char_t *) 0x6c7410 "<typ:add xmlns:typ=\"http://ws.apache.org/axis2/services/Calculator/types\">\r\n <param_1>11</param_1>\r\n <param_2>22</param_2>\r\n </typ:add>"
NOTE: Repeated '\r\n' strings.
Now my query is what exactly is the reason that service is not giving the proper respond?
a. Is it because I haven't initialized somethings or if I am missing to add someother AXIS related things into my service ? By the way, do we have to initialize the allocator and the env? If yes, where?
b. Are the structures env and _add showing correct dereferenced values?
c. Could it be the '\r\n' string causing the corruption? In that case, could it be the soapUI causing the problem?
Any help/input/pointer shall be much appreciated.
Thanks in-advance.
Best Regards,
Pankaj
Following is the code:
axiom_node_t* axis2_skel_Calculator_add(const axutil_env_t *env , axis2_msg_ctx_t *msg_ctx,
axiom_node_t* _add )
{
axiom_node_t *complex_node = NULL;
axiom_node_t *seq_node = NULL;
axiom_node_t *param1_node = NULL;
axiom_node_t *param1_text_node = NULL;
axis2_char_t *param1_str = NULL;
long int param1 = 0;
axiom_node_t *param2_node = NULL;
axiom_node_t *param2_text_node = NULL;
axis2_char_t *param2_str = NULL;
long int param2 = 0;
printf("NODE _add = %s\n", axiom_node_to_string( _add, env ));
if (!_add)
{
AXIS2_ERROR_SET(env->error, AXIS2_ERROR_SVC_SKEL_INPUT_OM_NODE_NULL,
AXIS2_FAILURE);
printf("Calculator client request ERROR: input parameter NULL\n");
return NULL;
}
param1_node = axiom_node_get_first_child(_add, env);
printf("NODE param1_node = %s\n", axiom_node_to_string( param1_node, env ));
if (!param1_node)
{
AXIS2_ERROR_SET(env->error,
AXIS2_ERROR_SVC_SKEL_INVALID_XML_FORMAT_IN_REQUEST,
AXIS2_FAILURE);
printf("Calculator service ERROR: invalid XML in request\n");
return NULL;
}
param1_text_node = axiom_node_get_first_child(param1_node, env);
if (!param1_text_node)
{
AXIS2_ERROR_SET(env->error,
AXIS2_ERROR_SVC_SKEL_INVALID_XML_FORMAT_IN_REQUEST,
AXIS2_FAILURE);
printf("Calculator service ERROR: invalid XML in request\n");
return NULL;
}
if (axiom_node_get_node_type(param1_text_node, env) == AXIOM_TEXT)
{
axiom_text_t *text =
(axiom_text_t *) axiom_node_get_data_element(param1_text_node, env);
if (text && axiom_text_get_value(text, env))
{
param1_str = (axis2_char_t *) axiom_text_get_value(text, env);
}
}
else
{
AXIS2_ERROR_SET(env->error,
AXIS2_ERROR_SVC_SKEL_INVALID_XML_FORMAT_IN_REQUEST,
AXIS2_FAILURE);
printf("Calculator service ERROR: invalid XML in request\n");
return NULL;
}
param2_node = axiom_node_get_next_sibling(param1_node, env);
if (!param2_node)
{
AXIS2_ERROR_SET(env->error,
AXIS2_ERROR_SVC_SKEL_INVALID_XML_FORMAT_IN_REQUEST,
AXIS2_FAILURE);
printf("Calculator service ERROR5: invalid XML in request\n");
return NULL;
}
param2_text_node = axiom_node_get_first_child(param2_node, env);
if (!param2_text_node)
{
AXIS2_ERROR_SET(env->error,
AXIS2_ERROR_SVC_SKEL_INVALID_XML_FORMAT_IN_REQUEST,
AXIS2_FAILURE);
printf("Calculator service ERROR: invalid XML in request\n");
return NULL;
}
if (axiom_node_get_node_type(param2_text_node, env) == AXIOM_TEXT)
{
axiom_text_t *text =
(axiom_text_t *) axiom_node_get_data_element(param2_text_node, env);
if (text && axiom_text_get_value(text, env))
{
param2_str = (axis2_char_t *) axiom_text_get_value(text, env);
}
}
else
{
AXIS2_ERROR_SET(env->error,
AXIS2_ERROR_SVC_SKEL_INVALID_XML_FORMAT_IN_REQUEST,
AXIS2_FAILURE);
printf("Calculator service ERROR: invalid XML in request\n");
return NULL;
}
if (param1_str && param2_str)
{
long int result = 0;
axis2_char_t result_str[255];
axiom_element_t *ele1 = NULL;
axiom_node_t *node1 = NULL,
*node2 = NULL;
axiom_namespace_t *ns1 = NULL;
axiom_text_t *text1 = NULL;
param1 = strtol(param1_str, NULL, 10);
param2 = strtol(param2_str, NULL, 10);
result = param1 + param2;
sprintf(result_str, "%ld", result);
ns1 = axiom_namespace_create(env,
"http://axis2/test/namespace1", "ns1");
ele1 = axiom_element_create(env, NULL, "result", ns1, &node1);
text1 = axiom_text_create(env, node1, result_str, &node2);
return node1;
}
AXIS2_ERROR_SET(env->error,
AXIS2_ERROR_SVC_SKEL_INVALID_OPERATION_PARAMETERS_IN_SOAP_REQUEST,
AXIS2_FAILURE);
printf("Calculator service ERROR: invalid parameters\n");
return NULL;
}
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