2 * uclient - ustream based protocol client library
4 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 #include <libubox/blobmsg.h>
28 #include "uclient-utils.h"
31 #define LIB_EXT "dylib"
36 static struct ustream_ssl_ctx *ssl_ctx;
37 static const struct ustream_ssl_ops *ssl_ops;
38 static int quiet = false;
39 static bool verify = true;
40 static const char *output_file;
41 static int output_fd = -1;
44 static int open_output_file(const char *path, bool create)
54 if (!strcmp(output_file, "-"))
57 return open(output_file, flags, 0644);
60 /* Don't automatically overwrite files if the name is derived from the URL */
64 filename = uclient_get_url_filename(path, "index.html");
65 ret = open(filename, flags, 0644);
71 static void request_done(struct uclient *cl)
73 if (output_fd >= 0 && !output_file) {
77 uclient_disconnect(cl);
81 static void header_done_cb(struct uclient *cl)
85 if (retries < 10 && uclient_http_redirect(cl)) {
87 fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
94 switch (cl->status_code) {
97 output_fd = open_output_file(cl->url->location, true);
100 perror("Cannot open output file");
108 fprintf(stderr, "HTTP error %d\n", cl->status_code);
115 static void read_data_cb(struct uclient *cl)
124 len = uclient_read(cl, buf, sizeof(buf));
128 write(output_fd, buf, len);
132 static void msg_connecting(struct uclient *cl)
134 char addr[INET6_ADDRSTRLEN];
140 uclient_get_addr(addr, &port, &cl->remote_addr);
141 fprintf(stderr, "Connecting to %s %s:%d\n", cl->url->host, addr, port);
144 static void init_request(struct uclient *cl)
148 uclient_http_set_request_type(cl, "GET");
152 static void eof_cb(struct uclient *cl)
156 fprintf(stderr, "Connection reset prematurely\n");
162 static void handle_uclient_error(struct uclient *cl, int code)
164 const char *type = "Unknown error";
168 case UCLIENT_ERROR_CONNECT:
169 type = "Connection failed";
172 case UCLIENT_ERROR_SSL_INVALID_CERT:
173 type = "Invalid SSL certificate";
177 case UCLIENT_ERROR_SSL_CN_MISMATCH:
178 type = "Server hostname does not match SSL certificate";
188 fprintf(stderr, "Connection error: %s%s\n", type, ignore ? " (ignored)" : "");
196 static const struct uclient_cb cb = {
197 .header_done = header_done_cb,
198 .data_read = read_data_cb,
200 .error = handle_uclient_error,
203 static int usage(const char *progname)
206 "Usage: %s [options] <URL>\n"
208 " -q: Turn off status messages\n"
209 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
212 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
213 " --no-check-certificate: don't validate the server's certificate\n"
219 static void init_ustream_ssl(void)
223 dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
227 ssl_ops = dlsym(dlh, "ustream_ssl_ops");
231 ssl_ctx = ssl_ops->context_new(false);
234 static int no_ssl(const char *progname)
236 fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
241 L_NO_CHECK_CERTIFICATE,
245 static const struct option longopts[] = {
246 [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
247 [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
251 int main(int argc, char **argv)
253 const char *progname = argv[0];
260 while ((ch = getopt_long(argc, argv, "qO:", longopts, &longopt_idx)) != -1) {
263 switch (longopt_idx) {
264 case L_NO_CHECK_CERTIFICATE:
267 case L_CA_CERTIFICATE:
269 ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
272 return usage(progname);
276 output_file = optarg;
282 return usage(progname);
290 return usage(progname);
292 if (!strncmp(argv[0], "https", 5) && !ssl_ctx)
293 return no_ssl(progname);
297 cl = uclient_new(argv[0], NULL, &cb);
299 fprintf(stderr, "Failed to allocate uclient context\n");
304 uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
312 if (output_fd >= 0 && output_fd != STDOUT_FILENO)
316 ssl_ops->context_free(ssl_ctx);