shithub: gemnine

ref: 456b709807fdeb7c725731fd1469f7181b342893
dir: gemnine/req.c

#include <u.h>
#include <libc.h>
#include <libsec.h>
#include <ctype.h>
#include "gemnine.h"

static char *statuses[] = {
	[Cinput] = "input",
	[Cinputnoecho] = "sensitive input",
	[Csuccess] = "success",
	[Credirtmp] = "redirect - temporary",
	[Credirperm] = "redirect - permanent",
	[Cfailtmp] = "temporary failure",
	[Cunavail] = "server unavailable",
	[Ccgierr] = "cgi error",
	[Cproxyerr] = "proxy error",
	[Cslowdown] = "slow down",
	[Cfailperm] = "permanent failure",
	[Cnotfound] = "not found",
	[Cgone] = "gone",
	[Cnoproxy] = "proxy request refused",
	[Cbadrequest] = "bad request",
	[Ccertrequired] = "client certificate required",
	[Ccertnotauth] = "certificate not authorized",
	[Ccertinvalid] = "certificate not valid",
};

Response *
request(Url *url)
{
	Thumbprint *th;
	Response *r;
	char *s, buf[1024], *port;
	TLSconn conn;
	int i, ok, len, oldfd;
	Url *u;

	r = calloc(1, sizeof(*r));
	r->fd = -1;
	r->url = url;

	if((port = url->port) == nil)
		port = "1965";
	if((r->fd = dial(netmkaddr(url->host, "tcp", port), nil, nil, nil)) < 0){
		werrstr("dial: %r");
		goto err;
	}
	th = initThumbprints("/sys/lib/ssl/gemini", nil, "x509");
	memset(&conn, 0, sizeof(conn));
	conn.serverName = r->url->host;
	oldfd = r->fd;
	r->fd = tlsClient(oldfd, &conn);
	close(oldfd);
	if(r->fd < 0){
		werrstr("tls: %r");
		goto err;
	}

	/* FIXME find a way to trust on the first run */
	if(th != nil){
		ok = okCertificate(conn.cert, conn.certlen, th);
		freeThumbprints(th);
		free(conn.cert);
		if(!ok){
			//fprint(2, "echo 'x509 %r server=%s' >>/sys/lib/ssl/gemini\n", r->url->server);
			//werrstr("untrusted cert");
			//goto err;
		}
	}

	fprint(r->fd, "%s\r\n", r->url->full);
	for(len = 0; len < sizeof(buf)-1; len++){
		if((i = read(r->fd, buf+len, 1)) < 0){
			werrstr("read: %r");
			goto err;
		}
		if(i == 0 || buf[len] == '\n')
			break;
	}

	s = buf;
	s[len] = 0;
	for(len--; len >= 0 && (s[len] == '\r' || s[len] == '\n'); len--)
		s[len] = 0;
	if(s[0] < '0' || s[0] > '9' || s[1] < '0' || s[1] > '9'){
		werrstr("invalid status");
		goto err;
	}
	r->code = 10*(int)(s[0]-'0') + s[1] - '0';
	s += 2;
	while(isspace(*s))
		s++;

	if(r->code < nelem(statuses))
		r->status = statuses[r->code];
	if(r->status == nil)
		r->status = "???";

	if(r->code >= 10 && r->code < 20){ /* input */
		r->prompt = estrdup(s);
	}else if(r->code >= 20 && r->code < 30){ /* success */
		r->mime = estrdup(s[0] ? s : "text/gemini");
	}else if(r->code >= 30 && r->code < 40){ /* redirect */
		if((u = urlparse(r->url, s)) == nil){
			werrstr("invalid redirect");
			goto err;
		}
		u->free = 1;
		freeresponse(r);
		r = request(u);
	}else{
		r->meta = estrdup(s);
		werrstr(r->status);
		goto err;
	}

err:
	return r;
}

void
freeresponse(Response *r)
{
	if(r == nil)
		return;
	close(r->fd);
	if(r->url->free)
		freeurl(r->url);
	free(r->mime);
	free(r->prompt);
	free(r->meta);
	free(r);
}