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.
27 #include <libubox/blobmsg.h>
30 #include "uclient-utils.h"
33 #define LIB_EXT "dylib"
38 static const char *user_agent = "uclient-fetch";
39 static const char *post_data;
40 static struct ustream_ssl_ctx *ssl_ctx;
41 static const struct ustream_ssl_ops *ssl_ops;
42 static int quiet = false;
43 static bool verify = true;
44 static bool default_certs = false;
45 static bool no_output;
46 static const char *output_file;
47 static int output_fd = -1;
50 static char *username;
51 static char *password;
52 static char *auth_str;
56 static void request_done(struct uclient *cl);
58 static int open_output_file(const char *path, bool create)
65 flags |= O_CREAT | O_EXCL;
68 if (!strcmp(output_file, "-"))
72 fprintf(stderr, "Writing to stdout\n");
75 return open(output_file, flags, 0644);
78 filename = uclient_get_url_filename(path, "index.html");
80 fprintf(stderr, "Writing to '%s'\n", filename);
81 ret = open(filename, flags, 0644);
87 static void header_done_cb(struct uclient *cl)
91 if (retries < 10 && uclient_http_redirect(cl)) {
93 fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
100 switch (cl->status_code) {
105 output_fd = open_output_file(cl->url->location, true);
108 perror("Cannot open output file");
116 fprintf(stderr, "HTTP error %d\n", cl->status_code);
123 static void read_data_cb(struct uclient *cl)
128 if (!no_output && output_fd < 0)
132 len = uclient_read(cl, buf, sizeof(buf));
138 write(output_fd, buf, len);
142 static void msg_connecting(struct uclient *cl)
144 char addr[INET6_ADDRSTRLEN];
150 uclient_get_addr(addr, &port, &cl->remote_addr);
151 fprintf(stderr, "Connecting to %s:%d\n", addr, port);
154 static int init_request(struct uclient *cl)
159 uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
161 rc = uclient_connect(cl);
167 rc = uclient_http_set_request_type(cl, post_data ? "POST" : "GET");
171 uclient_http_reset_headers(cl);
172 uclient_http_set_header(cl, "User-Agent", user_agent);
175 uclient_http_set_header(cl, "Content-Type", "application/x-www-form-urlencoded");
176 uclient_write(cl, post_data, strlen(post_data));
179 rc = uclient_request(cl);
186 static void request_done(struct uclient *cl)
189 uclient_set_url(cl, *urls, auth_str);
191 error_ret = init_request(cl);
196 if (output_fd >= 0 && !output_file) {
200 uclient_disconnect(cl);
205 static void eof_cb(struct uclient *cl)
209 fprintf(stderr, "Connection reset prematurely\n");
212 fprintf(stderr, "Download completed (%d bytes)\n", out_bytes);
217 static void handle_uclient_error(struct uclient *cl, int code)
219 const char *type = "Unknown error";
223 case UCLIENT_ERROR_CONNECT:
224 type = "Connection failed";
227 case UCLIENT_ERROR_TIMEDOUT:
228 type = "Connection timed out";
231 case UCLIENT_ERROR_SSL_INVALID_CERT:
232 type = "Invalid SSL certificate";
236 case UCLIENT_ERROR_SSL_CN_MISMATCH:
237 type = "Server hostname does not match SSL certificate";
247 fprintf(stderr, "Connection error: %s%s\n", type, ignore ? " (ignored)" : "");
255 static const struct uclient_cb cb = {
256 .header_done = header_done_cb,
257 .data_read = read_data_cb,
259 .error = handle_uclient_error,
262 static int usage(const char *progname)
265 "Usage: %s [options] <URL>\n"
267 " -q: Turn off status messages\n"
268 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
269 " --user=<user> HTTP authentication username\n"
270 " --password=<password> HTTP authentication password\n"
271 " --user-agent|-U <str> Set HTTP user agent\n"
272 " --post-data=STRING use the POST method; send STRING as the data\n"
273 " --spider|-s Spider mode - only check file existence\n"
276 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
277 " --no-check-certificate: don't validate the server's certificate\n"
282 static void init_ca_cert(void)
287 glob("/etc/ssl/certs/*.crt", 0, NULL, &gl);
288 for (i = 0; i < gl.gl_pathc; i++)
289 ssl_ops->context_add_ca_crt_file(ssl_ctx, gl.gl_pathv[i]);
292 static void init_ustream_ssl(void)
296 dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
300 ssl_ops = dlsym(dlh, "ustream_ssl_ops");
304 ssl_ctx = ssl_ops->context_new(false);
307 static int no_ssl(const char *progname)
309 fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
314 L_NO_CHECK_CERTIFICATE,
323 static const struct option longopts[] = {
324 [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
325 [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
326 [L_USER] = { "user", required_argument },
327 [L_PASSWORD] = { "password", required_argument },
328 [L_USER_AGENT] = { "user-agent", required_argument },
329 [L_POST_DATA] = { "post-data", required_argument },
330 [L_SPIDER] = { "spider", no_argument },
336 int main(int argc, char **argv)
338 const char *progname = argv[0];
341 bool has_cert = false;
347 while ((ch = getopt_long(argc, argv, "O:qsU:", longopts, &longopt_idx)) != -1) {
350 switch (longopt_idx) {
351 case L_NO_CHECK_CERTIFICATE:
354 case L_CA_CERTIFICATE:
357 ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
362 username = strdup(optarg);
363 memset(optarg, '*', strlen(optarg));
368 password = strdup(optarg);
369 memset(optarg, '*', strlen(optarg));
381 return usage(progname);
388 output_file = optarg;
397 return usage(progname);
404 if (verify && !has_cert)
405 default_certs = true;
408 return usage(progname);
411 for (i = 0; i < argc; i++) {
412 if (!strncmp(argv[i], "https", 5))
413 return no_ssl(progname);
424 asprintf(&auth_str, "%s:%s", username, password);
430 fprintf(stderr, "Downloading '%s'\n", argv[0]);
432 cl = uclient_new(argv[0], auth_str, &cb);
434 fprintf(stderr, "Failed to allocate uclient context\n");
438 if (ssl_ctx && default_certs)
441 rc = init_request(cl);
443 /* no error received, we can enter main loop */
446 fprintf(stderr, "Failed to establish connection\n");
454 if (output_fd >= 0 && output_fd != STDOUT_FILENO)
458 ssl_ops->context_free(ssl_ctx);