2004 by Marc J. Rochkind. All rights reserved. Portions marked "Open Source" may be copied under license.

 

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c8/miniws.c

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00001 /*
00002     Mini Web Server
00003     AUP2, Sec. 8.04.4
00004 
00005     Copyright 2003 by Marc J. Rochkind. All rights reserved.
00006     May be copied only for purposes and under conditions described
00007     on the Web page www.basepath.com/aup/copyright.htm.
00008 
00009     The Example Files are provided "as is," without any warranty;
00010     without even the implied warranty of merchantability or fitness
00011     for a particular purpose. The author and his publisher are not
00012     responsible for any damages, direct or incidental, resulting
00013     from the use or non-use of these Example Files.
00014 
00015     The Example Files may contain defects, and some contain deliberate
00016     coding mistakes that were included for educational reasons.
00017     You are responsible for determining if and how the Example Files
00018     are to be used.
00019 
00020 */
00021 #include "defs.h"
00022 #include "ssi.h"
00023 
00024 /* rfc2616 */
00025 /*[top]*/
00026 #define HEADER\
00027     "HTTP/1.0 %s\r\n"\
00028     "Server: AUP-ws\r\n"\
00029     "Content-Length: %ld\r\n"
00030 
00031 #define CONTENT_TEXT\
00032     "Content-Type: text/html\r\n\r\n"
00033 
00034 #define CONTENT_JPEG\
00035     "Content-Type: image/jpeg\r\n\r\n"
00036 
00037 #define HTML_NOTFOUND\
00038     "<!DOCTYPE html PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n"\
00039     "<html><head><title>Error 404</title>\n"\
00040     "</head><body>\n"\
00041     "<h2>AUP-ws server can't find document</h2>"\
00042     "</body></html>\r\n"
00043 /*[send_header]*/
00044 static void send_header(SSI *ssip, const char *msg, off_t len,
00045   const char *path, int fd)
00046 {
00047     char buf[1000], *dot;
00048 
00049     snprintf(buf, sizeof(buf), HEADER, msg, (long)len);
00050     ec_neg1( writeall(fd, buf, strlen(buf)) )
00051     dot = strrchr(path, '.');
00052     if (dot != NULL && (strcasecmp(dot, ".jpg") == 0 ||
00053       strcasecmp(dot, ".jpeg") == 0))
00054         ec_neg1( writeall(fd, CONTENT_JPEG, strlen(CONTENT_JPEG)) )
00055     else
00056         ec_neg1( writeall(fd, CONTENT_TEXT, strlen(CONTENT_TEXT)) )
00057     return;
00058 
00059 EC_CLEANUP_BGN
00060     EC_FLUSH("Error sending response (nonfatal)")
00061 EC_CLEANUP_END
00062 }
00063 /*[handle_request]*/
00064 #define DEFAULT_DOC "index.html"
00065 #define WEB_ROOT "/aup/webroot/"
00066 
00067 static bool handle_request(SSI *ssip, char *s, int fd)
00068 {
00069     char *tkn, buf[1000], path[500];
00070     int ntkn;
00071     FILE *in;
00072     struct stat statbuf;
00073     ssize_t nread;
00074 
00075     for (ntkn = 1; (tkn = strtok(s, " ")) != NULL; ntkn++) {
00076         s = NULL;
00077         switch (ntkn) {
00078         case 1:
00079             if (strcasecmp(tkn, "get") != 0) {
00080                 printf("Unknown request\n");
00081                 return false;
00082             }
00083             continue;
00084         case 2:
00085             break;
00086         }
00087         break;
00088     }
00089     snprintf(path, sizeof(path) - 1 - strlen(DEFAULT_DOC),
00090       "%s%s", WEB_ROOT, tkn);
00091     if (stat(path, &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
00092         if (path[strlen(path) - 1] != '/')
00093             strcat(path, "/");
00094         strcat(path, DEFAULT_DOC);
00095     }
00096     if (stat(path, &statbuf) == -1 ||
00097       (in = fopen(path, "rb")) == NULL) {
00098         send_header(ssip, "404 Not Found", strlen(HTML_NOTFOUND), "", fd);
00099         ec_neg1( writeall(fd, HTML_NOTFOUND, strlen(HTML_NOTFOUND)) )
00100         return false;
00101     }
00102     send_header(ssip, "200 OK", statbuf.st_size, path, fd);
00103     while ((nread = fread(buf, 1, sizeof(buf), in)) > 0)
00104         ec_neg1( writeall(fd, buf, nread) )
00105     ec_eof( fclose(in) )
00106     return true;
00107 
00108 EC_CLEANUP_BGN
00109     EC_FLUSH("Error sending response (nonfatal)")
00110     return false;
00111 EC_CLEANUP_END
00112 }
00113 /*[main]*/
00114 #define PORT ":8000"
00115 
00116 int main(void)
00117 {
00118     SSI *ssip = NULL;
00119     char msg[1600];
00120     ssize_t nrcv;
00121     int fd;
00122     char host[100] = "//";
00123 
00124     ec_neg1( gethostname(&host[2], sizeof(host) - 2 - strlen(PORT)) )
00125     strcat(host, PORT);
00126     printf("Connecting to host \"%s\"\n", host);
00127     ec_null( ssip = ssi_open(host, true) )
00128     printf("\t...connected\n");
00129     while (true) {
00130         ec_neg1( fd = ssi_wait_server(ssip) )
00131         switch (nrcv = read(fd, msg, sizeof(msg) - 1)) {
00132         case -1:
00133             printf("Read error (nonfatal)\n");
00134             /* fall through */
00135         case 0:
00136             ec_false( ssi_close_fd(ssip, fd) )
00137             continue;
00138         default:
00139             msg[nrcv] = '\0';
00140             (void)handle_request(ssip, msg, fd);
00141         }
00142     }
00143     ec_false( ssi_close(ssip) )
00144     printf("Done.\n");
00145     exit(EXIT_SUCCESS);
00146 
00147 EC_CLEANUP_BGN
00148     return EXIT_FAILURE;
00149 EC_CLEANUP_END
00150 }
00151 /*[]*/
00152 #if 0
00153 /*[html]*/
00154 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
00155 <html>
00156 <head>
00157 </head>
00158 <body>
00159 <h1>This is a test page.</h1>
00160 <p><img src="picture.jpg">
00161 </body>
00162 </html>
00163 /*[]*/
00164 #endif

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