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/* See COPYING file for copyright and license details. */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "util.h"
#ifndef WINVER
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
/* plundered from suckless' sic */
int dial(char *host, char *port) {
static struct addrinfo hints;
int srv;
struct addrinfo *res, *r;
#ifdef WINVER
WSADATA w;
if(WSAStartup(MAKEWORD(2,2), &w)!= 0) {
fprintf(stderr, "error: failed to start winsock\n");
return -1;
}
#endif
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if(getaddrinfo(host, port, &hints, &res) != 0) {
fprintf(stderr, "error: cannot resolve hostname %s\n", host);
return -1;
}
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) {
fprintf(stderr, "error: cannot connect to host %s\n", host);
return -1;
}
return srv;
}
int get(char *host, char *path, char *sendcookie, char *savecookie, char **buf) {
size_t l, res;
int fd, i, p;
char h[HDRMAX] = "";
char c[COOKIEMAX] = "";
char t[BUFSIZ];
char *t2;
char m[256];
if((fd = dial(host, "80")) == -1) return 0;
if(sendcookie && sendcookie[0])
snprintf(c, COOKIEMAX, "\r\nCookie: %s", sendcookie);
snprintf(h, HDRMAX, "GET %s HTTP/1.0\r\nUser-Agent: getxbook-"VERSION \
" (not mozilla)\r\nHost: %s%s\r\n\r\n", path, host, c);
if(!send(fd, h, strlen(h), 0)) return 0;
*buf = NULL;
l = 0;
snprintf(m, 256, "Set-Cookie: %%%ds;", COOKIEMAX-1);
while((res = recv(fd, t, BUFSIZ, 0)) > 0) {
if(sscanf(t, "HTTP/%d.%d %d", &i, &i, &p) == 3 && p != 200) {
if(p == 403)
fprintf(stderr, "403 forbidden: your IP address may be temporarily blocked\n");
return 0;
}
t2 = t;
if(savecookie != NULL) {
while((t2 = strstr(t2, "Set-Cookie: ")) && sscanf(t2, m, c)) {
strncat(savecookie, c, COOKIEMAX);
t2++;
}
}
if((t2 = strstr(t, "\r\n\r\n")) != NULL && (t2 - t) < (signed)res) {
t2+=4;
l = res - (t2 - t);
*buf = malloc(sizeof(char *) * l);
memcpy(*buf, t2, l);
break;
}
}
*buf = realloc(*buf, sizeof(char *) * (l+BUFSIZ));
for(; (res = recv(fd, *buf+l, BUFSIZ, 0)) > 0; l+=res)
*buf = realloc(*buf, sizeof(char *) * (l+BUFSIZ));
return l;
}
int gettofile(char *host, char *url, char *sendcookie, char *savecookie, char *savepath) {
char *buf = 0;
FILE *f;
size_t i, l;
if(!(l = get(host, url, sendcookie, savecookie, &buf))) {
fprintf(stderr, "Could not download %s\n", url);
return 1;
}
if((f = fopen(savepath, "wb")) == NULL) {
fprintf(stderr, "Could not create file %s\n", savepath);
free(buf); return 1;
}
for(i=0; i < l; i+=BUFSIZ)
if(!fwrite(buf+i, l-i > BUFSIZ ? BUFSIZ : l-i, 1, f)) {
fprintf(stderr, "Error writing file %s\n", savepath);
free(buf); fclose(f); return 1;
}
free(buf);
fclose(f);
return 0;
}
int post(char *host, char *path, char *data, char **buf) {
size_t l, res;
int fd, i, p;
char h[HDRMAX] = "";
char t[BUFSIZ];
char *t2;
if((fd = dial(host, "80")) == -1) return 0;
snprintf(h, HDRMAX, "POST %s HTTP/1.0\r\nUser-Agent: getxbook-"VERSION \
" (not mozilla)\r\nContent-Length: %d\r\n" \
"Content-Type: application/x-www-form-urlencoded\r\n" \
"Host: %s\r\n\r\n%s\r\n",
path, (int)strlen(data), host, data);
if(!send(fd, h, strlen(h), 0)) return 0;
*buf = NULL;
l = 0;
while((res = recv(fd, t, BUFSIZ, 0)) > 0) {
if(sscanf(t, "HTTP/%d.%d %d", &i, &i, &p) == 3 && p != 200)
return 0;
t2 = t;
if((t2 = strstr(t, "\r\n\r\n")) != NULL && (t2 - t) < (signed)res) {
t2+=4;
l = res - (t2 - t);
*buf = malloc(sizeof(char *) * l);
memcpy(*buf, t2, l);
break;
}
}
*buf = realloc(*buf, sizeof(char *) * (l+BUFSIZ));
for(; (res = recv(fd, *buf+l, BUFSIZ, 0)) > 0; l+=res)
*buf = realloc(*buf, sizeof(char *) * (l+BUFSIZ));
return l;
}
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