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[Seobeo] Updated so that it create socket for both server and clients.
author June Park <parkjune1995@gmail.com>
date Fri, 26 Sep 2025 15:14:46 -0700
parents 2758f5527d2b
children 3e12bf044589
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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
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5 #include "seobeo/seobeo.h"
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6
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7 Dowa_PHashMap cache;
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8
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9 void SigchildHandler(int s)
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10 {
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11 (void)s; // quiet unused variable warning
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12
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13 // waitpid() might overwrite errno, so we save and restore it:
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14 int saved_errno = errno;
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15
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16 while(waitpid(-1, NULL, WNOHANG) > 0);
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17
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18 errno = saved_errno;
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19 }
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20
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21 void HandleClientRequest(Seobeo_PHandle cli)
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22 {
3
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23 size_t idx = Dowa_HashMap_GetPosition(cache, "index.html");
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24 Dowa_PHashEntry entry = cache->entries[idx];
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26 if (!entry) {
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27 // 404 response if missing
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28 const char *not_found =
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29 "HTTP/1.1 404 Not Found\r\n"
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30 "Content-Length: 0\r\n"
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31 "Connection: close\r\n"
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32 "\r\n";
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33 send(cli->socket, not_found, strlen(not_found), 0);
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34 Seobeo_Handle_Destroy(cli);
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35 return;
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36 }
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37
3
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38 // 3) Prepare header with the correct content‐length
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39 size_t body_size = entry->capacity;
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40 const char *template =
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41 "HTTP/1.1 200 OK\r\n"
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42 "Content-Type: text/html\r\n"
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43 "Content-Length: %zu\r\n"
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44 "Connection: close\r\n"
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45 "\r\n";
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46
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47 // Compute how large the header is and allocate just enough space
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48 int header_len = snprintf(NULL, 0, template, body_size);
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49 char *header = malloc(header_len + 1);
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50 if (!header) {
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51 perror("malloc");
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52 return;
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53 }
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54 snprintf(header, header_len + 1, template, body_size);
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55
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56 Seobeo_Handle_QueueData(cli,
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57 (const uint8*)header,
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58 (uint32)(header_len + 1));
3
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59 free(header);
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60
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61 Seobeo_Handle_QueueData(cli,
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62 (const uint8*)entry->buffer,
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63 (uint32)body_size);
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66 Seobeo_Handle_Flush(cli);
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67
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68 Seobeo_Handle_Destroy(cli);
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69 }
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70
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71 int main(void)
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72 {
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73 struct sigaction sa;
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74
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75 cache = Dowa_HashMap_Create(1024);
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76 if (Dowa_Cache_Folder(cache, "seobeo/pages") != 0)
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77 {
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78 perror("Dowa_Cache_Folder");
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79 return -1;
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80 }
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81
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82 Seobeo_PHandle srv = Seobeo_Stream_Handle_Create(NULL, "8080");
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83
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84 if (srv->socket < 0) return 1;
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85 printf("Listening on port 8080\n");
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86
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87 sa.sa_handler = SigchildHandler; // reap all dead processes
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88 sigemptyset(&sa.sa_mask);
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89 sa.sa_flags = SA_RESTART;
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90 if (sigaction(SIGCHLD, &sa, NULL) == -1) {
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91 perror("sigaction");
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92 exit(1);
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93 }
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94
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95 while (1) {
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96 Seobeo_PHandle cli = Seobeo_Stream_Handle_Accept(srv);
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97 if (cli == NULL)
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98 {
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99 continue;
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100 }
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101 printf("connected to %s\n", cli->host);
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102
4
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103 if (!fork())
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104 {
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105 HandleClientRequest(cli);
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106 exit(0);
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107 }
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108 Seobeo_Handle_Destroy(cli);
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109 }
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110
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111 Seobeo_Handle_Destroy(srv);
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112 return 0;
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113 }