Organize sources

http/http.c

@@ -0,0 +1,144 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+
+#include "http/http.h"
+
+#define BUFSIZE 256
+
+static int http_listen(int listen_port, int maxcons)
+{
+  struct sockaddr_in server = {0};
+  int listenfd = -1;
+
+  // getaddrinfo for host
+  server.sin_family = AF_INET;
+  server.sin_addr.s_addr = INADDR_ANY;
+  server.sin_port = htons(listen_port);
+
+  listenfd = socket(AF_INET, SOCK_STREAM, 0);
+  if (listenfd < 0) {
+    perror("socket");
+    return -1;
+  }
+
+  int optval = 1;
+  setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(int));
+
+  if (bind(listenfd, (struct sockaddr *)&server, sizeof(server)) < 0) {
+    perror("bind");
+    goto error;
+  }
+
+  if (listen(listenfd, maxcons) < 0) {
+    perror("listen");
+    goto error;
+  }
+
+  return listenfd;
+error:
+  if (listenfd >= 0)
+    close(listenfd);
+  return -1;
+}
+
+static void http_process(http_worker_t *worker, FILE *stream)
+{
+  // Read headers
+  if (!fgets(worker->client_method, sizeof(worker->client_method), stream)) {
+    return;
+  }
+
+  // Consume headers
+  for(int i = 0; i < 50; i++) {
+    char line[BUFSIZE];
+    if (!fgets(line, BUFSIZE, stream))
+      return;
+    if (line[0] == '\r' && line[1] == '\n')
+      break;
+  }
+
+  for (int i = 0; worker->methods[i].name; i++) {
+    if (strstr(worker->client_method, worker->methods[i].name)) {
+      worker->methods[i].func(worker, stream);
+      return;
+    }
+  }
+
+  http_404(worker, stream);
+}
+
+static void http_client(http_worker_t *worker)
+{
+  worker->client_host = inet_ntoa(worker->client_addr.sin_addr);
+  printf("Client connected %s.\n", worker->client_host);
+
+  struct timeval tv;
+  tv.tv_sec = 3;
+  tv.tv_usec = 0;
+  setsockopt(worker->client_fd, SOL_SOCKET, SO_RCVTIMEO, (const char*)&tv, sizeof(tv));
+  setsockopt(worker->client_fd, SOL_SOCKET, SO_SNDTIMEO, (const char*)&tv, sizeof(tv));
+
+  int on = 1;
+  setsockopt(worker->client_fd, IPPROTO_TCP, TCP_NODELAY, (void *)&on, sizeof(on));
+  setsockopt(worker->client_fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof(on));
+
+  FILE *stream = fdopen(worker->client_fd, "r+");
+  if (stream) {
+    http_process(worker, stream);
+    fclose(stream);
+  }
+
+  close(worker->client_fd);
+  worker->client_fd = -1;
+
+  printf("Client disconnected %s.\n", worker->client_host);
+  worker->client_host = NULL;
+}
+
+static int http_worker(http_worker_t *worker)
+{
+  while (1) {
+    int addrlen = sizeof(worker->client_addr);
+    worker->client_fd = accept(worker->listen_fd, (struct sockaddr *)&worker->client_addr, &addrlen);
+    if (worker->client_fd < 0) {
+      goto error;
+    }
+
+    http_client(worker);
+  }
+
+error:
+  free(worker->name);
+  free(worker);
+  return -1;
+}
+
+int http_server(int listen_port, int maxcons, http_method_t *methods)
+{
+  int listen_fd = http_listen(9092, maxcons);
+  if (listen_fd < 0) {
+    return -1;
+  }
+
+  while (maxcons-- > 0) {
+    char name[20];
+    sprintf(name, "HTTP%d/%d", listen_port, maxcons);
+
+    http_worker_t *worker = calloc(1, sizeof(http_worker_t));
+    worker->name = strdup(name);
+    worker->listen_fd = listen_fd;
+    worker->methods = methods;
+    worker->client_fd = -1;
+    pthread_create(&worker->thread, NULL, (void *(*)(void*))http_worker, worker);
+  }
+
+  return listen_fd;
+}
+