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The tree example with json pointers

This commit is contained in:
Willem Toorop 2015-10-06 12:29:15 +02:00
parent 51bfa9c86a
commit f632ef8939
4 changed files with 129 additions and 4 deletions
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10
spec/example/Makefile.in
View File

@ -48,9 +48,9 @@ LDFLAGS=@LDFLAGS@ -L../../src
LDLIBS=../../src/libgetdns.la @LIBS@
OBJS=example-all-functions.lo example-simple-answers.lo example-tree.lo example-synchronous.lo example-reverse.lo synchronous-json-pointer.lo simple-json-pointer.lo
OBJS=example-all-functions.lo example-simple-answers.lo example-tree.lo example-synchronous.lo example-reverse.lo synchronous-json-pointer.lo simple-json-pointer.lo tree-json-pointer.lo
PROGRAMS=example-all-functions example-synchronous example-simple-answers example-tree example-reverse synchronous-json-pointer simple-json-pointer
PROGRAMS=example-all-functions example-synchronous example-simple-answers example-tree example-reverse synchronous-json-pointer simple-json-pointer tree-json-pointer
.SUFFIXES: .c .o .a .lo .h
@ -80,6 +80,9 @@ synchronous-json-pointer: synchronous-json-pointer.lo
simple-json-pointer: simple-json-pointer.lo
$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) $(LDLIBS) $(EXTENSION_LIBEVENT_LIB) $(EXTENSION_LIBEVENT_LDFLAGS) $(EXTENSION_LIBEVENT_EXT_LIBS) -o $@ simple-json-pointer.lo
tree-json-pointer: tree-json-pointer.lo
$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) $(LDLIBS) $(EXTENSION_LIBEVENT_LIB) $(EXTENSION_LIBEVENT_LDFLAGS) $(EXTENSION_LIBEVENT_EXT_LIBS) -o $@ tree-json-pointer.lo
$(EXTENSION_LIBEVENT_LIB):
@echo "***"
@echo "*** Three examples from the specification need libevent."
@ -176,3 +179,6 @@ synchronous-concise.lo synchronous-concise.o: $(srcdir)/synchronous-concise.c $(
../../src/getdns/getdns.h
synchronous-json-pointer.lo synchronous-json-pointer.o: $(srcdir)/synchronous-json-pointer.c $(srcdir)/getdns_core_only.h \
../../src/getdns/getdns.h
tree-json-pointer.lo tree-json-pointer.o: $(srcdir)/tree-json-pointer.c $(srcdir)/getdns_libevent.h \
../../src/config.h ../../src/getdns/getdns.h \
$(srcdir)/../../src/getdns/getdns_ext_libevent.h $(srcdir)/../../src/getdns/getdns_extra.h

2
spec/example/simple-concise.c
View File

@ -91,7 +91,7 @@ int main()
else if ((r = getdns_extension_set_libevent_base(context, event_base)))
fprintf(stderr, "Setting the event base failed");
else if ((r = getdns_address( context, "www.example.com", extensions
else if ((r = getdns_address( context, query_name, extensions
, userarg, &transaction_id, callback)))
fprintf(stderr, "Error scheduling asynchronous request");

2
spec/example/simple-json-pointer.c
View File

@ -85,7 +85,7 @@ int main()
else if ((r = getdns_extension_set_libevent_base(context, event_base)))
fprintf(stderr, "Setting the event base failed");
else if ((r = getdns_address( context, "www.example.com", extensions
else if ((r = getdns_address( context, query_name, extensions
, userarg, &transaction_id, callback)))
fprintf(stderr, "Error scheduling asynchronous request");

119
spec/example/tree-json-pointer.c Normal file
View File

@ -0,0 +1,119 @@
#include <assert.h>
#include <inttypes.h>
#include <stdio.h>
#include <getdns_libevent.h>
/* Set up the callback function, which will also do the processing of the results */
void callback(getdns_context *context,
getdns_callback_type_t callback_type,
getdns_dict *response,
void *userarg,
getdns_transaction_t transaction_id)
{
getdns_return_t r; /* Holder for all function returns */
getdns_list *replies_tree;
size_t length, i;
switch(callback_type) {
case GETDNS_CALLBACK_CANCEL:
printf("Transaction with ID %"PRIu64" was cancelled.\n", transaction_id);
return;
case GETDNS_CALLBACK_TIMEOUT:
printf("Transaction with ID %"PRIu64" timed out.\n", transaction_id);
return;
case GETDNS_CALLBACK_ERROR:
printf("An error occurred for transaction ID %"PRIu64".\n", transaction_id);
return;
default: break;
}
assert( callback_type == GETDNS_CALLBACK_COMPLETE );
if ((r = getdns_dict_get_list(response, "replies_tree", &replies_tree)))
fprintf(stderr, "Could not get \"replies_tree\" from reponse");
else if ((r = getdns_list_get_length(replies_tree, &length)))
fprintf(stderr, "Could not get replies_tree\'s length");
else for (i = 0; i < length && r == GETDNS_RETURN_GOOD; i++) {
getdns_dict *reply;
getdns_list *answer;
size_t n_answers, j;
if ((r = getdns_list_get_dict(replies_tree, i, &reply)))
fprintf(stderr, "Could not get address %zu from just_address_answers", i);
else if ((r = getdns_dict_get_list(reply, "answer", &answer)))
fprintf(stderr, "Could not get \"address_data\" from address");
else if ((r = getdns_list_get_length(answer, &n_answers)))
fprintf(stderr, "Could not get answer section\'s length");
else for (j = 0; j < n_answers && r == GETDNS_RETURN_GOOD; j++) {
getdns_dict *rr;
getdns_bindata *address = NULL;
if ((r = getdns_list_get_dict(answer, j, &rr)))
fprintf(stderr, "Could net get rr %zu from answer section", j);
else if (getdns_dict_get_bindata(rr, "/rdata/ipv4_address", &address) == GETDNS_RETURN_GOOD)
printf("The IPv4 address is ");
else if (getdns_dict_get_bindata(rr, "/rdata/ipv6_address", &address) == GETDNS_RETURN_GOOD)
printf("The IPv6 address is ");
if (address) {
char *address_str;
if (!(address_str = getdns_display_ip_address(address))) {
fprintf(stderr, "Could not convert second address to string");
r = GETDNS_RETURN_MEMORY_ERROR;
break;
}
printf("%s\n", address_str);
free(address_str);
}
}
}
if (r) {
assert( r != GETDNS_RETURN_GOOD );
fprintf(stderr, ": %d\n", r);
}
getdns_dict_destroy(response);
}
int main()
{
getdns_return_t r; /* Holder for all function returns */
getdns_context *context = NULL;
struct event_base *event_base = NULL;
getdns_dict *extensions = NULL;
char *query_name = "www.example.com";
/* Could add things here to help identify this call */
char *userarg = NULL;
getdns_transaction_t transaction_id;
if ((r = getdns_context_create(&context, 1)))
fprintf(stderr, "Trying to create the context failed");
else if (!(event_base = event_base_new()))
fprintf(stderr, "Trying to create the event base failed.\n");
else if ((r = getdns_extension_set_libevent_base(context, event_base)))
fprintf(stderr, "Setting the event base failed");
else if ((r = getdns_address( context, query_name, extensions
, userarg, &transaction_id, callback)))
fprintf(stderr, "Error scheduling asynchronous request");
else if (event_base_dispatch(event_base) < 0)
fprintf(stderr, "Error dispatching events\n");
/* Clean up */
if (event_base)
event_base_free(event_base);
if (context)
getdns_context_destroy(context);
/* Assuming we get here, leave gracefully */
exit(EXIT_SUCCESS);
}