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>
30 #define LIB_EXT "dylib"
35 static struct ustream_ssl_ctx *ssl_ctx;
36 static const struct ustream_ssl_ops *ssl_ops;
37 static int quiet = false;
38 static bool verify = true;
39 static const char *output_file;
40 static int output_fd = -1;
43 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 len = strcspn(path, ";&");
65 while (len > 0 && path[len - 1] == '/')
68 for (str = path + len - 1; str >= path; str--) {
77 filename = alloca(len + 1);
78 strncpy(filename, str, len);
81 filename = "index.html";
84 return open(filename, flags, 0644);
87 static void request_done(struct uclient *cl)
89 if (output_fd >= 0 && !output_file) {
93 uclient_disconnect(cl);
97 static void header_done_cb(struct uclient *cl)
101 if (retries < 10 && uclient_http_redirect(cl)) {
103 fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
110 switch (cl->status_code) {
113 output_fd = open_output_file(cl->url->location, true);
116 perror("Cannot open output file");
129 static void read_data_cb(struct uclient *cl)
138 len = uclient_read(cl, buf, sizeof(buf));
142 write(output_fd, buf, len);
146 static void msg_connecting(struct uclient *cl)
148 char addr[INET6_ADDRSTRLEN];
154 uclient_get_addr(addr, &port, &cl->remote_addr);
155 fprintf(stderr, "Connecting to %s %s:%d\n", cl->url->host, addr, port);
158 static void init_request(struct uclient *cl)
162 uclient_http_set_request_type(cl, "GET");
166 static void eof_cb(struct uclient *cl)
171 static void handle_uclient_error(struct uclient *cl, int code)
173 const char *type = "Unknown error";
177 case UCLIENT_ERROR_CONNECT:
178 type = "Connection failed";
181 case UCLIENT_ERROR_SSL_INVALID_CERT:
182 type = "Invalid SSL certificate";
186 case UCLIENT_ERROR_SSL_CN_MISMATCH:
187 type = "Server hostname does not match SSL certificate";
197 fprintf(stderr, "Connection error: %s%s\n", type, ignore ? " (ignored)" : "");
205 static const struct uclient_cb cb = {
206 .header_done = header_done_cb,
207 .data_read = read_data_cb,
209 .error = handle_uclient_error,
212 static int usage(const char *progname)
215 "Usage: %s [options] <URL>\n"
217 " -q: Turn off status messages\n"
218 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
221 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
222 " --no-check-certificate: don't validate the server's certificate\n"
228 static void init_ustream_ssl(void)
232 dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
236 ssl_ops = dlsym(dlh, "ustream_ssl_ops");
240 ssl_ctx = ssl_ops->context_new(false);
243 static int no_ssl(const char *progname)
245 fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
250 L_NO_CHECK_CERTIFICATE,
254 static const struct option longopts[] = {
255 [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
256 [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
260 int main(int argc, char **argv)
262 const char *progname = argv[0];
269 while ((ch = getopt_long(argc, argv, "qO:", longopts, &longopt_idx)) != -1) {
272 switch (longopt_idx) {
273 case L_NO_CHECK_CERTIFICATE:
276 case L_CA_CERTIFICATE:
278 ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
281 return usage(progname);
285 output_file = optarg;
291 return usage(progname);
299 return usage(progname);
301 if (!strncmp(argv[0], "https", 5) && !ssl_ctx)
302 return no_ssl(progname);
306 cl = uclient_new(argv[0], NULL, &cb);
308 fprintf(stderr, "Failed to allocate uclient context\n");
313 uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
321 if (output_fd >= 0 && output_fd != STDOUT_FILENO)
325 ssl_ops->context_free(ssl_ctx);