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Diffstat (limited to 'getgbook.c')
-rw-r--r--getgbook.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/getgbook.c b/getgbook.c
new file mode 100644
index 0000000..c17abf6
--- /dev/null
+++ b/getgbook.c
@@ -0,0 +1,100 @@
+#define usage "getgbook bookid"
+
+#define hostname "books.google.com"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+
+void die(char *msg) {
+ fputs(msg, stderr);
+ exit(EXIT_FAILURE);
+}
+
+int dial(char *host, char *port) {
+ static struct addrinfo hints;
+ int srv;
+ struct addrinfo *res, *r;
+
+ memset(&hints, 0, sizeof hints);
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ if(getaddrinfo(host, port, &hints, &res) != 0)
+ die("error: cannot resolve hostname\n");
+ for(r = res; r; r = r->ai_next) {
+ if((srv = socket(r->ai_family, r->ai_socktype, r->ai_protocol)) == -1)
+ continue;
+ if(connect(srv, r->ai_addr, r->ai_addrlen) == 0)
+ break;
+ close(srv);
+ }
+ freeaddrinfo(res);
+ if(!r)
+ die("error: cannot connect to host\n");
+ return srv;
+}
+
+char * get(FILE *srv, char *host, char *path) {
+ size_t l, res;
+ int fd, i;
+ char *buf, *c, *p;
+
+ fprintf(srv, "GET %s HTTP/1.0\r\nUser-Agent: getgbook-prealpha (not mozilla)\r\nHost: %s\r\n\r\n", path, host);
+
+ fflush(srv);
+
+ l=0;
+ fd = fileno(srv);
+
+ buf = malloc(sizeof(char *) * 4096);
+ for(i=0; (res = read(fd, buf+l, 4096)) > 0; l+=res, i++)
+ buf = realloc(buf, sizeof(char *) * (l+4096));
+
+ /* check that it's a 200 */
+ if(strncmp(buf+9, "200 ", 4)) {
+ free(buf);
+ return NULL;
+ }
+
+ /* exclude header */
+ for(p = buf; *p && *(p+1) && *(p+2) && *(p+3); p++)
+ if(!strncmp(p, "\r\n\r\n", 4)) break;
+ p+=4;
+
+ i = l - (p - buf);
+ c = malloc(i);
+ memcpy(c, p, i);
+ free(buf);
+
+ return c;
+}
+
+int main(int argc, char *argv[])
+{
+ int i, s;
+ char *bookid, url[80];
+ char *curpage;
+ FILE *srv;
+
+ if(argc != 2)
+ die("usage: " usage "\n");
+
+ bookid = argv[1];
+
+ i = dial(hostname, "80");
+ srv = fdopen(i, "r+");
+
+ snprintf(url, 80, "/books?id=%s&pg=%s&jscmd=click3", bookid, "PA1");
+ if((curpage = get(srv, hostname, url)) == NULL)
+ fprintf(stderr,"Error downloading page\n");
+ else {
+ fputs(curpage,stdout);
+ free(curpage);
+ }
+
+ return 0;
+}