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annotate seobeo/main.c @ 1:adcfad6e86fb

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Updated naming and separated out some logic within seobeo.
author June Park <parkjune1995@gmail.com>
date Wed, 24 Sep 2025 09:11:20 -0700
parents 5695ef413be0
children 2758f5527d2b
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1 /*
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2 ** server.c -- a stream socket server demo
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3 */
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4
1
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5 #include "seobeo/seobeo.h"
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6
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7 void SigchildHandler(int s)
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8 {
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9 (void)s; // quiet unused variable warning
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10
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11 // waitpid() might overwrite errno, so we save and restore it:
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12 int saved_errno = errno;
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13
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14 while(waitpid(-1, NULL, WNOHANG) > 0);
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15
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16 errno = saved_errno;
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17 }
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19
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20 void *GetInternetaddr(struct sockaddr *sa)
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21 {
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22 if (sa->sa_family == AF_INET)
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23 {
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24 return &(((struct sockaddr_in*)sa)->sin_addr);
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25 }
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26
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27 return &(((struct sockaddr_in6*)sa)->sin6_addr);
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28 }
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29
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30 void HandleClientRequest(int client_fd)
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31 {
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32 FILE *file = fopen("seobeo/index.html", "rb");
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33 if (!file) {
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34 perror("fopen");
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35 return;
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36 }
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37
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38 fseek(file, 0, SEEK_END);
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39 size_t size = ftell(file);
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40 fseek(file, 0, SEEK_SET);
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41
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42 char *data = malloc(size);
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43 fread(data, 1, size, file);
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44 fclose(file);
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45
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46 char *header = malloc(100);
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47 sprintf(
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48 header,
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49 "HTTP/1.1 200 OK\r\n"
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50 "Content-Type: text/html\r\n"
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51 "Content-Length: %zu\r\n"
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52 "Connection: close\r\n"
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53 "\r\n",
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54 size
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55 );
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56
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57 send(client_fd, header, strlen(header), 0);
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58 ssize_t total_sent = 0;
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59 while (total_sent < size)
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60 {
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61 ssize_t sent = send(client_fd, data + total_sent, size - total_sent, 0);
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62 if (sent <= 0) break;
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63 total_sent += sent;
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64 }
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65
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66 close(client_fd);
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67 }
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68
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69 int main(void)
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70 {
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71 int32 client_fd;
0
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72 struct sockaddr_storage client_addr;
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73 socklen_t sin_size;
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74
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75 char client_inet_addr[INET6_ADDRSTRLEN];
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76
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77 struct sigaction sa;
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78
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79 sa.sa_handler = SigchildHandler; // reap all dead processes
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80 sigemptyset(&sa.sa_mask);
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81 sa.sa_flags = SA_RESTART;
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82 if (sigaction(SIGCHLD, &sa, NULL) == -1) {
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83 perror("sigaction");
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84 exit(1);
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85 }
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86
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87 int sock_fd = Seobeo_CreateSocket(1, "6969", 10);
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88
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89 printf("server: waiting for connections...\n");
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90
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91 while (1)
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92 {
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93 sin_size = sizeof(client_addr);
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94 client_fd = accept(sock_fd, (struct sockaddr *)&client_addr, &sin_size);
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95
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96 if (client_fd == -1)
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97 {
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98 perror("accept");
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99 break;
0
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100 }
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101
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102 inet_ntop(
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103 client_addr.ss_family,
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104 GetInternetaddr((struct sockaddr *)&client_addr),
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105 client_inet_addr, sizeof client_inet_addr);
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106
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107 printf("server: got connection from %s\n", client_inet_addr);
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108
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109 // Create a child process
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110 if (!fork())
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111 {
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112 close(sock_fd);
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113 HandleClientRequest(client_fd);
0
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114 exit(0);
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115 }
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116
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117 close(client_fd);
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118 }
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119
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120 return 0;
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121 }
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122