133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <ulfius.h>
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#include <jansson.h>
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#define ROUTE_HELLO "/hello"
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/**
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* callback functions declaration
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*/
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int callback_get_hello (const struct _u_request * request, struct _u_response * response, void * user_data);
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int callback_default (const struct _u_request * request, struct _u_response * response, void * user_data);
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int main(int argc, char *argv[]) {
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/*declaration*/
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struct _u_instance instance;
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unsigned int port;
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int ret;
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printf("main() Started...\n");
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if (argc != 2) {
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fprintf(stderr, "Usage: %s <port>\n", argv[0]);
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exit(1);
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}
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printf("main() argv[1]: %s\n", argv[1]);
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/*store command line argument in int variable*/
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/*validate user input*/
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/*omit injection*/
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/*stream:argv*/
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ret = sscanf(argv[1], "%d", &port);
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/*valid user input:1 successfully filled item*/
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if (ret != 1) {
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fprintf(stderr, "The argument must be an integer\n");
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exit(1);
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}
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if (port < 0) {
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fprintf(stderr, "Error passing a negative port\n");
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exit(1);
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}
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printf("main() port: %d\n", port);
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if (ulfius_init_instance(&instance, port, NULL, NULL) != U_OK) {
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printf("main() Error ulfius_init_instance, abort");
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return(1);
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}
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//TODO Why?
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u_map_put(instance.default_headers, "Access-Control-Allow-Origin", "*");
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// Maximum body size sent by the client is 1 Kb
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instance.max_post_body_size = 1024;
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// Endpoint list declaration
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ulfius_add_endpoint_by_val(&instance, "GET", ROUTE_HELLO, NULL, 0, &callback_get_hello, NULL);
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// default_endpoint declaration
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ulfius_set_default_endpoint(&instance, &callback_default, NULL);
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// Start the framework
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// Open an http connection
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ret = ulfius_start_framework(&instance);
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if (ret == U_OK) {
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printf("main() Start framework on port %d\n", instance.port);
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// Wait for the user to press <enter> on the console to quit the application
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getchar();
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} else {
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printf("main() Error starting framework\n");
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}
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printf("main() End framework\n");
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ulfius_stop_framework(&instance);
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ulfius_clean_instance(&instance);
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printf("main() Done.\n");
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return 0;
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}
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/**
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* Callback function that put a "Hello World!" string in the response
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*/
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int callback_get_hello (const struct _u_request * request, struct _u_response * response, void * user_data) {
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/*declaration*/
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json_t *array, *integer1, *integer2;
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json_int_t * json_nb;
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int number;
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size_t size;
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/*pg int*/
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number = 42;
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json_nb = (void *)&number;
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printf("address of number: %p\n", &number);
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printf("address of json_nb: %p\n", json_nb);
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printf("value of number: %d\n", number);
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printf("value of json_nb: %lld\n", *json_nb);
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/*pg array*/
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array = json_array();
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integer1 = json_integer(42);
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integer2 = json_integer(23);
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json_array_append(array, integer1);
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json_array_append(array, integer2);
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json_decref(integer1);
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json_decref(integer2);
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size = json_array_size(array);
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fprintf(stdout,"main() size(array): %ld\n", size);
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ulfius_set_json_body_response(response, 200, array);
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json_decref(array);
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return U_CALLBACK_CONTINUE;
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}
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/**
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* Default callback function called if no endpoint has a match
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*/
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int callback_default (const struct _u_request * request, struct _u_response * response, void * user_data) {
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ulfius_set_string_body_response(response, 404, "Page not found, do what you want");
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return U_CALLBACK_CONTINUE;
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}
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