git.zerfleddert.de Git - record-dvb/blob - http.c

   1 #include <strings.h>
   2 #include <string.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <sys/types.h>
   6 #include <sys/socket.h>
   7 #include <netinet/in.h>
   8 #include <arpa/inet.h>
   9
  10 #include "common.h"
  11 #include "http.h"
  12
  13 #define BUFFSIZE 1024
  14
  15 int is_http(char *url)
  16 {
  17         if (strlen(url) < 8)
  18                 return 0;
  19
  20         if (!strncasecmp("http://",url,7))
  21                 return 1;
  22
  23         return 0;
  24 }
  25
  26 int open_http(char *url)
  27 {
  28         int fd;
  29         struct sockaddr_in server;
  30         static struct dvb_host *dvbhost = NULL;
  31         char c, buffer[BUFFSIZE], *pos;
  32         int lines = 0;
  33
  34         if(!is_http(url))
  35                 return -1;
  36
  37         if (!dvbhost) {
  38                 dvbhost = parse(&(url[7]), "80");
  39                 dvbhost->socktype = SOCK_STREAM;
  40         }
  41
  42         if (resolve(dvbhost, &server) < 0) {
  43                 return -1;
  44         }
  45
  46         if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
  47                 perror("socket");
  48                 return -1;
  49         }
  50
  51         if (connect(fd, (struct sockaddr*) &server, sizeof(server)) < 0) {
  52                 perror("connect");
  53                 return -1;
  54         }
  55
  56         snprintf(buffer, BUFFSIZE-1, "GET /%s HTTP/1.0\n\n",dvbhost->location);
  57         buffer[BUFFSIZE-1] = 0;
  58         if (send(fd, buffer, strlen(buffer), 0) < 0) {
  59                 perror("send");
  60                 return -1;
  61         }
  62
  63         pos = buffer;
  64         while (1) {
  65                 if (recv(fd, &c, 1, 0) < 1) {
  66                         perror("recv");
  67                         exit(EXIT_FAILURE);
  68                 }
  69
  70                 if (pos-buffer >= BUFFSIZE)
  71                         pos = buffer;
  72
  73                 *(pos++) = c;
  74
  75                 if (c == 0x0a) {
  76                         *(--pos) = 0;
  77                         if (pos-buffer > 0 && *(--pos) == 0x0d)
  78                                 *pos = 0;
  79
  80                         if (pos-buffer == 0)
  81                                 break;
  82
  83 #ifdef DEBUG
  84                         printf("%d. %s (%d)\n", lines, buffer, pos-buffer);
  85 #endif
  86                         if (lines == 0) {
  87                                 if (strncasecmp("HTTP/", buffer, 5)) {
  88                                         fprintf(stderr, "Wrong answer from server: %s\n", buffer);
  89                                         return -1;
  90                                 }
  91
  92                                 pos = buffer;
  93                                 while (*pos != 0) {
  94                                         if (*(pos++) == ' ') {
  95                                                 if(strncmp("200", pos, 3)) {
  96                                                         fprintf(stderr, "Wrong result-code: %s\n", buffer);
  97                                                         return -1;
  98                                                 } else {
  99                                                         break;
 100                                                 }
 101                                         }
 102
 103                                         if (*(++pos) == 0) {
 104                                                 fprintf(stderr, "Wrong answer from server: %s\n", buffer);
 105                                                 return -1;
 106                                         }
 107                                 }
 108                         }
 109
 110                         pos = buffer;
 111                         lines++;
 112                 }
 113         }
 114
 115         return fd;
 116 }