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#include <stdio.h>
#include <signal.h>
#include <string.h>
#include "workflow/WFHttpServer.h"
#include "workflow/WFFacilities.h"
#include "config/config.h"
static WFFacilities::WaitGroup wait_group(1);
static srpc::RPCConfig config;
void sig_handler(int signo)
{
wait_group.done();
}
void init()
{
if (config.load("./server.conf") == false)
{
perror("Load config failed");
exit(1);
}
signal(SIGINT, sig_handler);
signal(SIGTERM, sig_handler);
}
// Example for Fibonacci.
void Fibonacci(int n, protocol::HttpResponse *resp)
{
unsigned long long x = 0, y = 1;
char buf[256];
int i;
if (n <= 0 || n > 94)
{
resp->append_output_body_nocopy("<html>Invalid Number.</html>",
strlen("<html>Invalid Number.</html>"));
return;
}
resp->append_output_body_nocopy("<html>", strlen("<html>"));
for (i = 2; i < n; i++)
{
sprintf(buf, "<p>%llu + %llu = %llu.</p>", x, y, x + y);
resp->append_output_body(buf);
y = x + y;
x = y - x;
}
if (n == 1)
y = 0;
sprintf(buf, "<p>The No. %d Fibonacci number is: %llu.</p>", n, y);
resp->append_output_body(buf);
resp->append_output_body_nocopy("</html>", strlen("</html>"));
}
void process(WFHttpTask *task)
{
const char *uri = task->get_req()->get_request_uri();
if (*uri == '/')
uri++;
int n = atoi(uri);
protocol::HttpResponse *resp = task->get_resp();
fprintf(stderr, "server get request. n = %d\n", n);
// All calculations can be encapsulated by 'go_task'
WFGoTask *go_task = WFTaskFactory::create_go_task("go", Fibonacci, n, resp);
// Tasks will be dispatch asynchonously after 'push_back()'
series_of(task)->push_back(go_task);
}
int main()
{
init();
WFHttpServer server(process);
if (server.start(config.server_port()) == 0)
{
fprintf(stderr, "Computing server started, port %u\n", config.server_port());
wait_group.wait();
server.stop();
}
else
perror("server start");
return 0;
}
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