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.
21 #include <sys/socket.h>
32 #include <libubox/blobmsg.h>
36 #include "uclient-utils.h"
39 #define LIB_EXT "dylib"
44 static const char *user_agent = "uclient-fetch";
45 static const char *post_data;
46 static struct ustream_ssl_ctx *ssl_ctx;
47 static const struct ustream_ssl_ops *ssl_ops;
48 static int quiet = false;
49 static bool verify = true;
50 static bool proxy = true;
51 static bool default_certs = false;
52 static bool no_output;
53 static const char *output_file;
54 static int output_fd = -1;
56 static off_t out_offset;
57 static off_t out_bytes;
59 static char *auth_str;
63 static bool resume, cur_resume;
65 static struct progress pmt;
66 static struct uloop_timeout pmt_timer;
68 static int init_request(struct uclient *cl);
69 static void request_done(struct uclient *cl);
71 static void pmt_update(struct uloop_timeout *t)
73 progress_update(&pmt, out_offset, out_bytes, out_len);
74 uloop_timeout_set(t, 1000);
78 get_proxy_url(char *url)
86 sep = strchr(url, ':');
93 memcpy(prefix, url, sep - url);
94 strcpy(prefix + (sep - url), "_proxy");
95 return getenv(prefix);
98 static int open_output_file(const char *path, uint64_t resume_offset)
100 char *filename = NULL;
107 flags = O_WRONLY | O_TRUNC;
109 if (!cur_resume && !output_file)
115 if (!strcmp(output_file, "-")) {
117 fprintf(stderr, "Writing to stdout\n");
123 filename = uclient_get_url_filename(path, "index.html");
124 output_file = filename;
128 fprintf(stderr, "Writing to '%s'\n", output_file);
129 ret = open(output_file, flags, 0644);
134 lseek(ret, resume_offset, SEEK_SET) < 0) {
136 fprintf(stderr, "Failed to seek %"PRIu64" bytes in output file\n", resume_offset);
142 out_offset = resume_offset;
143 out_bytes += resume_offset;
146 progress_init(&pmt, output_file);
147 pmt_timer.cb = pmt_update;
148 pmt_timer.cb(&pmt_timer);
156 static void header_done_cb(struct uclient *cl)
163 static const struct blobmsg_policy policy[__H_MAX] = {
164 [H_RANGE] = { .name = "content-range", .type = BLOBMSG_TYPE_STRING },
165 [H_LEN] = { .name = "content-length", .type = BLOBMSG_TYPE_STRING },
167 struct blob_attr *tb[__H_MAX];
168 uint64_t resume_offset = 0, resume_end, resume_size;
172 int ret = uclient_http_redirect(cl);
175 fprintf(stderr, "Failed to redirect to %s on %s\n", cl->url->location, cl->url->host);
182 fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
189 if (cl->status_code == 204 && cur_resume) {
190 /* Resume attempt failed, try normal download */
196 blobmsg_parse(policy, __H_MAX, tb, blob_data(cl->meta), blob_len(cl->meta));
198 switch (cl->status_code) {
201 fprintf(stderr, "File download already fully retrieved; nothing to do.\n");
207 fprintf(stderr, "Error: Partial content received, full content requested\n");
215 fprintf(stderr, "Content-Range header is missing\n");
220 if (sscanf(blobmsg_get_string(tb[H_RANGE]),
221 "bytes %"PRIu64"-%"PRIu64"/%"PRIu64,
222 &resume_offset, &resume_end, &resume_size) != 3) {
224 fprintf(stderr, "Content-Range header is invalid\n");
234 out_len = strtoul(blobmsg_get_string(tb[H_LEN]), NULL, 10);
236 output_fd = open_output_file(cl->url->location, resume_offset);
239 perror("Cannot open output file");
247 fprintf(stderr, "HTTP error %d\n", cl->status_code);
254 static void read_data_cb(struct uclient *cl)
259 if (!no_output && output_fd < 0)
263 len = uclient_read(cl, buf, sizeof(buf));
269 write(output_fd, buf, len);
273 static void msg_connecting(struct uclient *cl)
275 char addr[INET6_ADDRSTRLEN];
281 uclient_get_addr(addr, &port, &cl->remote_addr);
282 fprintf(stderr, "Connecting to %s:%d\n", addr, port);
285 static void check_resume_offset(struct uclient *cl)
292 file = uclient_get_url_filename(cl->url->location, "index.html");
296 ret = stat(file, &st);
304 snprintf(range_str, sizeof(range_str), "bytes=%"PRIu64"-", (uint64_t) st.st_size);
305 uclient_http_set_header(cl, "Range", range_str);
308 static int init_request(struct uclient *cl)
315 uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
318 cl->timeout_msecs = timeout * 1000;
320 rc = uclient_connect(cl);
326 rc = uclient_http_set_request_type(cl, post_data ? "POST" : "GET");
330 uclient_http_reset_headers(cl);
331 uclient_http_set_header(cl, "User-Agent", user_agent);
333 check_resume_offset(cl);
336 uclient_http_set_header(cl, "Content-Type", "application/x-www-form-urlencoded");
337 uclient_write(cl, post_data, strlen(post_data));
340 rc = uclient_request(cl);
347 static void request_done(struct uclient *cl)
349 const char *proxy_url;
352 proxy_url = get_proxy_url(*urls);
354 uclient_set_url(cl, proxy_url, NULL);
355 uclient_set_proxy_url(cl, *urls, auth_str);
357 uclient_set_url(cl, *urls, auth_str);
361 error_ret = init_request(cl);
366 if (output_fd >= 0 && !output_file) {
370 uclient_disconnect(cl);
375 static void eof_cb(struct uclient *cl)
378 pmt_update(&pmt_timer);
379 uloop_timeout_cancel(&pmt_timer);
380 fprintf(stderr, "\n");
385 fprintf(stderr, "Connection reset prematurely\n");
388 fprintf(stderr, "Download completed (%"PRIu64" bytes)\n", (uint64_t) out_bytes);
393 static void handle_uclient_error(struct uclient *cl, int code)
395 const char *type = "Unknown error";
399 case UCLIENT_ERROR_CONNECT:
400 type = "Connection failed";
403 case UCLIENT_ERROR_TIMEDOUT:
404 type = "Connection timed out";
407 case UCLIENT_ERROR_SSL_INVALID_CERT:
408 type = "Invalid SSL certificate";
412 case UCLIENT_ERROR_SSL_CN_MISMATCH:
413 type = "Server hostname does not match SSL certificate";
423 fprintf(stderr, "Connection error: %s%s\n", type, ignore ? " (ignored)" : "");
431 static const struct uclient_cb cb = {
432 .header_done = header_done_cb,
433 .data_read = read_data_cb,
435 .error = handle_uclient_error,
438 static int usage(const char *progname)
441 "Usage: %s [options] <URL>\n"
443 " -4 Use IPv4 only\n"
444 " -6 Use IPv6 only\n"
445 " -q Turn off status messages\n"
446 " -O <file> Redirect output to file (use \"-\" for stdout)\n"
447 " -P <dir> Set directory for output files\n"
448 " --user=<user> HTTP authentication username\n"
449 " --password=<password> HTTP authentication password\n"
450 " --user-agent|-U <str> Set HTTP user agent\n"
451 " --post-data=STRING use the POST method; send STRING as the data\n"
452 " --spider|-s Spider mode - only check file existence\n"
453 " --timeout=N|-T N Set connect/request timeout to N seconds\n"
454 " --proxy=on|off|-Y on|off Enable/disable env var configured proxy\n"
457 " --ca-certificate=<cert> Load CA certificates from file <cert>\n"
458 " --no-check-certificate don't validate the server's certificate\n"
463 static void init_ca_cert(void)
468 glob("/etc/ssl/certs/*.crt", 0, NULL, &gl);
469 for (i = 0; i < gl.gl_pathc; i++)
470 ssl_ops->context_add_ca_crt_file(ssl_ctx, gl.gl_pathv[i]);
473 static void init_ustream_ssl(void)
477 dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
481 ssl_ops = dlsym(dlh, "ustream_ssl_ops");
485 ssl_ctx = ssl_ops->context_new(false);
488 static int no_ssl(const char *progname)
491 "%s: SSL support not available, please install one of the "
492 "libustream-ssl-* libraries as well as the ca-bundle and ",
493 "ca-certificates packages.\n",
500 L_NO_CHECK_CERTIFICATE,
514 static const struct option longopts[] = {
515 [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
516 [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
517 [L_USER] = { "user", required_argument },
518 [L_PASSWORD] = { "password", required_argument },
519 [L_USER_AGENT] = { "user-agent", required_argument },
520 [L_POST_DATA] = { "post-data", required_argument },
521 [L_SPIDER] = { "spider", no_argument },
522 [L_TIMEOUT] = { "timeout", required_argument },
523 [L_CONTINUE] = { "continue", no_argument },
524 [L_PROXY] = { "proxy", required_argument },
525 [L_NO_PROXY] = { "no-proxy", no_argument },
526 [L_QUIET] = { "quiet", no_argument },
532 int main(int argc, char **argv)
534 const char *progname = argv[0];
535 const char *proxy_url;
536 char *username = NULL;
537 char *password = NULL;
540 bool has_cert = false;
545 signal(SIGPIPE, SIG_IGN);
548 while ((ch = getopt_long(argc, argv, "46cO:P:qsT:U:Y:", longopts, &longopt_idx)) != -1) {
551 switch (longopt_idx) {
552 case L_NO_CHECK_CERTIFICATE:
555 case L_CA_CERTIFICATE:
558 ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
563 username = strdup(optarg);
564 memset(optarg, '*', strlen(optarg));
569 password = strdup(optarg);
570 memset(optarg, '*', strlen(optarg));
582 timeout = atoi(optarg);
588 if (strcmp(optarg, "on") != 0)
598 return usage(progname);
614 output_file = optarg;
619 perror("Change output directory");
630 timeout = atoi(optarg);
633 if (strcmp(optarg, "on") != 0)
637 return usage(progname);
644 if (verify && !has_cert)
645 default_certs = true;
648 return usage(progname);
651 for (i = 0; i < argc; i++) {
652 if (!strncmp(argv[i], "https", 5))
653 return no_ssl(progname);
664 asprintf(&auth_str, "%s:%s", username, password);
670 fprintf(stderr, "Downloading '%s'\n", argv[0]);
672 proxy_url = get_proxy_url(argv[0]);
674 cl = uclient_new(proxy_url, auth_str, &cb);
676 uclient_set_proxy_url(cl, argv[0], NULL);
678 cl = uclient_new(argv[0], auth_str, &cb);
681 fprintf(stderr, "Failed to allocate uclient context\n");
685 uclient_http_set_address_family(cl, af);
687 if (ssl_ctx && default_certs)
691 rc = init_request(cl);
693 /* no error received, we can enter main loop */
696 fprintf(stderr, "Failed to establish connection\n");
704 if (output_fd >= 0 && output_fd != STDOUT_FILENO)
708 ssl_ops->context_free(ssl_ctx);