bicyclesonthemoon.info Git - ott/enhance/blob - nofading-cgi.c

   1 // nofadingd.cpp
   2 // The online interface for the fading enhancement tool
   3 // 04.03.2015
   4 //
   5 // Copyright (C) 2015  Balthasar Szczepański
   6 //
   7 // This program is free software: you can redistribute it and/or modify
   8 // it under the terms of the GNU Affero General Public License as
   9 // published by the Free Software Foundation, either version 3 of the
  10 // License, or (at your option) any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU Affero General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU Affero General Public License
  18 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 //
  20
  21 // Requires cgilib (http://www.infodrom.org/projects/cgilib/)
  22 // line 146 of cgi.h must be changed from:
  23 // extern }
  24 // to:
  25 // }
  26
  27 by balthasar_s
  28     Fri Jun 12, 2015 6:59 am UTC
  29
  30     Forum: Individual XKCD Comic Threads
  31     Topic: 1190: "Time"
  32     Replies: 93408
  33     Views: 10895653
  34
  35
  36
  37 #include <cgi.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41 #include <string.h>
  42 #include <sys/wait.h>
  43 #include <sys/stat.h>
  44
  45 #define WGET_PATH  "/usr/bin/wget"
  46 #define ENH_PATH   "./nofading"
  47 #define RM_PATH    "/bin/rm"
  48 #define LOG_PATH   "/eizm/log/nofading/nofading.log"
  49 #define USERAGENT  "No fading (1190.bicyclesonthemoon.dnsd.info/nofading/nofading.htm)"
  50 #define MSTD_PATH  "/pro/nofading/nf.png"
  51
  52 int main (int argc, char *argv[]);
  53 void mustard(int mustard);
  54
  55 FILE *pix;
  56
  57 char url[1024];
  58 char path[256];
  59 s_cgi *cgi;
  60 int t;
  61 pid_t sub;
  62
  63 int main (int argc, char *argv[])
  64 {
  65         unsigned char buf[1024];
  66         struct stat st;
  67         unsigned long p;
  68         unsigned short q;
  69         char **up;
  70
  71         cgi=cgiInit();
  72
  73         up=cgiGetFiles(cgi);
  74         if (up)
  75         {
  76                 sprintf(path,"%s",cgiGetFile(cgi,up[0])->tmpfile);
  77                 sprintf(url,"%s",cgiGetFile(cgi,up[0])->filename);
  78         }
  79         else
  80         {
  81                 sprintf(url,"%s",(cgiGetValue(cgi,"inpix")!=NULL)?(cgiGetValue(cgi,"inpix")):"");
  82                 sprintf(path,"/var/tmp/%lu",(unsigned long)getpid());
  83
  84                 //Why is  there no spawnl() in linux?
  85                 sub=fork();
  86                 if(sub==0)
  87                 {
  88                         t=execl(WGET_PATH,WGET_PATH,"-q","-t","2","-U",USERAGENT,"-O",path,url,(char *)0);
  89                         exit(t);
  90                 }
  91                 waitpid(sub,&t,0);
  92                 if(t)mustard(t);
  93         }
  94
  95         sub=fork();
  96         if(sub==0)
  97         {
  98                 t=execl(ENH_PATH,ENH_PATH,path,path,(cgiGetValue(cgi,"f")!=NULL)?(cgiGetValue(cgi,"f")):"0","q",cgiGetValue(cgi,"a")!=NULL?"0":"a",(char *)0);
  99                 exit(t);
 100         }
 101         waitpid(sub,&t,0);
 102         if(t)mustard(t);
 103
 104         pix=fopen(path,"rb");
 105         if(pix==NULL)
 106                 mustard(123);
 107         fstat(fileno(pix),&st);
 108         p=st.st_size/1024;
 109         q=st.st_size%1024;
 110
 111         printf("Content-Length: %lu\n",(unsigned long)(st.st_size));
 112         printf("Content-type: image/png\n\n");
 113         for(unsigned long i=0;i<p;++i)
 114         {
 115                 fread(buf,1,1024,pix);
 116                 fwrite(buf,1,1024,stdout);
 117         }
 118         if(q!=0)
 119         {
 120                 fread(buf,1,q,pix);
 121                 fwrite(buf,1,q,stdout);
 122         }
 123         fclose(pix);
 124         fflush(stdout);
 125         mustard(0);//no mustard
 126 }
 127
 128 void mustard(int mustard)
 129 {
 130         if(mustard)
 131         {
 132                 cgiRedirect(MSTD_PATH);
 133         }
 134         sub=fork();
 135         if(sub==0)
 136         {
 137                 t=execl(RM_PATH,RM_PATH,"-f",path,(char *)0);
 138                 exit(t);
 139         }
 140         waitpid(sub,&t,0);
 141         pix=fopen(LOG_PATH,"at");
 142         if(pix!=NULL)
 143         {
 144                 fprintf(pix,"%x %s\n",mustard,url);
 145                 fclose(pix);
 146         }
 147         exit(mustard);
 148 }