質問編集履歴
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sorceを追加しました。
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File without changes
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body
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@@ -15,4 +15,144 @@
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15
15
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HTTP/1.1 200 OK
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Content-Length: 27
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Content-Type: text/html
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-
Date: Thu Jan 1 00:00:00 JST 2012
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Date: Thu Jan 1 00:00:00 JST 2012
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20
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```C言語
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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26
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#include <sys/socket.h>
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27
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#include <netinet/in.h>
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28
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#include <arpa/inet.h>
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29
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30
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#define SERVER_PORT (80)
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32
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int
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main(void) {
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int listen_sockfd;
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int accept_sockfd;
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socklen_t sin_size;
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struct sockaddr_in client;
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struct sockaddr_in serv;
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int retc; // return code from functions
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FILE *fp;
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42
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43
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int numccr = 0; /* counter for contiguraous '\n' */
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char inchar; /* received (keyboard inputted) char */
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45
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/* init */
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memset(&client, 0, sizeof(struct sockaddr_in));
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sin_size = sizeof(struct sockaddr_in);
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49
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/* make TCP socket */
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listen_sockfd = socket(PF_INET, SOCK_STREAM, 0);
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if (listen_sockfd < 0 ) {
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perror("webserver (socket)");
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exit(11);
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}
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/* bind() */
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memset(&serv, 0, sizeof(struct sockaddr_in));
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serv.sin_family = PF_INET; // IPv4
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60
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serv.sin_addr.s_addr = htonl(INADDR_ANY); // IP address
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61
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serv.sin_port = htons(SERVER_PORT); // port #
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retc = bind(listen_sockfd, (struct sockaddr *)&serv,
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sizeof(struct sockaddr_in));
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if (retc < 0 ) {
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perror("webserver (bind)");
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close(listen_sockfd);
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exit(12);
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}
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/* listen() */
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retc = listen(listen_sockfd, SOMAXCONN);
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if (retc != 0) {
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perror("webserver (listen)");
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close(listen_sockfd);
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exit(13);
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}
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80
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/* accept() */
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accept_sockfd = accept(listen_sockfd,
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(struct sockaddr *)&client, &sin_size);
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if (accept_sockfd < 0) {
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perror("webserver (accept)");
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exit(14);
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}
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close(listen_sockfd);
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/* use FILE * pointer instead of file descriptor */
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if ((fp = fdopen(accept_sockfd, "r+")) == NULL) {
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perror("webserver (fdopen)");
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exit(15);
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}
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/*** receive request ***/
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/*
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* (通信回線:TCP port 80)(fp)から１文字ずつ入力⇨モニタ出力
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* '\n'が２個連続したら次へ
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*/
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while(1){
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fscanf(fp,"%c", &inchar);
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if(inchar == '\r'){
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continue;
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}
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fprintf(stderr,"%c", inchar);
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if(inchar == '\n'){
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++numccr;
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if(numccr == 2){
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break;
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}
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}
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else{
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numccr = 0;
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}
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}
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121
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/*** send header, then body ***/
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122
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/*
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* TCP port 80(fp)に以下の６行（サーバ➡クライアントに送られるはずの
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* HTTPストリーム）をただ表示する
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*/
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126
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127
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fprintf(fp,
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128
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"HTTP/1.1 200 OK\n"
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129
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"Content-Length: 27\n"
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130
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"Content-Type: text/html\n"
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131
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"Date: Thu Jan 1 00:00:00 JST 2012\n"
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"\n"
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133
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"<p>My num is 201704198.</p>"
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134
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);
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135
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136
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+
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137
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/*** monitor set data ***/
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138
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/*
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139
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* モニタ出力: 標準エラー出力に上と同じものを表示する
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140
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*/
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141
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fprintf(stderr,
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142
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"HTTP/1.1 200 OK\n"
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143
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"Content-Length: 27\n"
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144
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"Content-Type: text/html\n"
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145
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"Date: Thu Jan 1 00:00:00 JST 2012\n"
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146
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"\n"
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147
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"<p>My num is 201704198.</p>"
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148
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);
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149
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150
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/* cleanup */
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151
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fclose(fp);
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152
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close(listen_sockfd);
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153
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close(accept_sockfd);
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154
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fprintf(stderr, "server: exit normally.\n");
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155
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exit(0);
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156
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}
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157
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158
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``
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