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.
31 #include <libubox/blobmsg.h>
35 #include "uclient-utils.h"
38 #define LIB_EXT "dylib"
43 static const char *user_agent = "uclient-fetch";
44 static const char *post_data;
45 static struct ustream_ssl_ctx *ssl_ctx;
46 static const struct ustream_ssl_ops *ssl_ops;
47 static int quiet = false;
48 static bool verify = true;
49 static bool proxy = true;
50 static bool default_certs = false;
51 static bool no_output;
52 static const char *output_file;
53 static int output_fd = -1;
55 static off_t out_offset;
56 static off_t out_bytes;
58 static char *auth_str;
62 static bool resume, cur_resume;
64 static struct progress pmt;
65 static struct uloop_timeout pmt_timer;
67 static int init_request(struct uclient *cl);
68 static void request_done(struct uclient *cl);
70 static void pmt_update(struct uloop_timeout *t)
72 progress_update(&pmt, out_offset, out_bytes, out_len);
73 uloop_timeout_set(t, 1000);
77 get_proxy_url(char *url)
85 sep = strchr(url, ':');
92 memcpy(prefix, url, sep - url);
93 strcpy(prefix + (sep - url), "_proxy");
94 return getenv(prefix);
97 static int open_output_file(const char *path, uint64_t resume_offset)
99 char *filename = NULL;
108 if (!cur_resume && !output_file)
114 if (!strcmp(output_file, "-")) {
116 fprintf(stderr, "Writing to stdout\n");
122 filename = uclient_get_url_filename(path, "index.html");
123 output_file = filename;
127 fprintf(stderr, "Writing to '%s'\n", output_file);
128 ret = open(output_file, flags, 0644);
133 lseek(ret, resume_offset, SEEK_SET) < 0) {
135 fprintf(stderr, "Failed to seek %"PRIu64" bytes in output file\n", resume_offset);
141 out_offset = resume_offset;
142 out_bytes += resume_offset;
145 progress_init(&pmt, output_file);
146 pmt_timer.cb = pmt_update;
147 pmt_timer.cb(&pmt_timer);
155 static void header_done_cb(struct uclient *cl)
162 static const struct blobmsg_policy policy[__H_MAX] = {
163 [H_RANGE] = { .name = "content-range", .type = BLOBMSG_TYPE_STRING },
164 [H_LEN] = { .name = "content-length", .type = BLOBMSG_TYPE_STRING },
166 struct blob_attr *tb[__H_MAX];
167 uint64_t resume_offset = 0, resume_end, resume_size;
171 int ret = uclient_http_redirect(cl);
174 fprintf(stderr, "Failed to redirect to %s on %s\n", cl->url->location, cl->url->host);
181 fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
188 if (cl->status_code == 204 && cur_resume) {
189 /* Resume attempt failed, try normal download */
195 blobmsg_parse(policy, __H_MAX, tb, blob_data(cl->meta), blob_len(cl->meta));
197 switch (cl->status_code) {
200 fprintf(stderr, "File download already fully retrieved; nothing to do.\n");
206 fprintf(stderr, "Error: Partial content received, full content requested\n");
214 fprintf(stderr, "Content-Range header is missing\n");
219 if (sscanf(blobmsg_get_string(tb[H_RANGE]),
220 "bytes %"PRIu64"-%"PRIu64"/%"PRIu64,
221 &resume_offset, &resume_end, &resume_size) != 3) {
223 fprintf(stderr, "Content-Range header is invalid\n");
233 out_len = strtoul(blobmsg_get_string(tb[H_LEN]), NULL, 10);
235 output_fd = open_output_file(cl->url->location, resume_offset);
238 perror("Cannot open output file");
246 fprintf(stderr, "HTTP error %d\n", cl->status_code);
253 static void read_data_cb(struct uclient *cl)
258 if (!no_output && output_fd < 0)
262 len = uclient_read(cl, buf, sizeof(buf));
268 write(output_fd, buf, len);
272 static void msg_connecting(struct uclient *cl)
274 char addr[INET6_ADDRSTRLEN];
280 uclient_get_addr(addr, &port, &cl->remote_addr);
281 fprintf(stderr, "Connecting to %s:%d\n", addr, port);
284 static void check_resume_offset(struct uclient *cl)
291 file = uclient_get_url_filename(cl->url->location, "index.html");
295 ret = stat(file, &st);
303 snprintf(range_str, sizeof(range_str), "bytes=%"PRIu64"-", (uint64_t) st.st_size);
304 uclient_http_set_header(cl, "Range", range_str);
307 static int init_request(struct uclient *cl)
314 uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
317 cl->timeout_msecs = timeout * 1000;
319 rc = uclient_connect(cl);
325 rc = uclient_http_set_request_type(cl, post_data ? "POST" : "GET");
329 uclient_http_reset_headers(cl);
330 uclient_http_set_header(cl, "User-Agent", user_agent);
332 check_resume_offset(cl);
335 uclient_http_set_header(cl, "Content-Type", "application/x-www-form-urlencoded");
336 uclient_write(cl, post_data, strlen(post_data));
339 rc = uclient_request(cl);
346 static void request_done(struct uclient *cl)
348 const char *proxy_url;
351 proxy_url = get_proxy_url(*urls);
353 uclient_set_url(cl, proxy_url, NULL);
354 uclient_set_proxy_url(cl, *urls, auth_str);
356 uclient_set_url(cl, *urls, auth_str);
360 error_ret = init_request(cl);
365 if (output_fd >= 0 && !output_file) {
369 uclient_disconnect(cl);
374 static void eof_cb(struct uclient *cl)
377 pmt_update(&pmt_timer);
378 uloop_timeout_cancel(&pmt_timer);
379 fprintf(stderr, "\n");
384 fprintf(stderr, "Connection reset prematurely\n");
387 fprintf(stderr, "Download completed (%"PRIu64" bytes)\n", (uint64_t) out_bytes);
392 static void handle_uclient_error(struct uclient *cl, int code)
394 const char *type = "Unknown error";
398 case UCLIENT_ERROR_CONNECT:
399 type = "Connection failed";
402 case UCLIENT_ERROR_TIMEDOUT:
403 type = "Connection timed out";
406 case UCLIENT_ERROR_SSL_INVALID_CERT:
407 type = "Invalid SSL certificate";
411 case UCLIENT_ERROR_SSL_CN_MISMATCH:
412 type = "Server hostname does not match SSL certificate";
422 fprintf(stderr, "Connection error: %s%s\n", type, ignore ? " (ignored)" : "");
430 static const struct uclient_cb cb = {
431 .header_done = header_done_cb,
432 .data_read = read_data_cb,
434 .error = handle_uclient_error,
437 static int usage(const char *progname)
440 "Usage: %s [options] <URL>\n"
442 " -q: Turn off status messages\n"
443 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
444 " -P <dir>: Set directory for output files\n"
445 " --user=<user> HTTP authentication username\n"
446 " --password=<password> HTTP authentication password\n"
447 " --user-agent|-U <str> Set HTTP user agent\n"
448 " --post-data=STRING use the POST method; send STRING as the data\n"
449 " --spider|-s Spider mode - only check file existence\n"
450 " --timeout=N|-T N Set connect/request timeout to N seconds\n"
451 " --proxy=on|off|-Y on|off Enable/disable env var configured proxy\n"
454 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
455 " --no-check-certificate: don't validate the server's certificate\n"
460 static void init_ca_cert(void)
465 glob("/etc/ssl/certs/*.crt", 0, NULL, &gl);
466 for (i = 0; i < gl.gl_pathc; i++)
467 ssl_ops->context_add_ca_crt_file(ssl_ctx, gl.gl_pathv[i]);
470 static void init_ustream_ssl(void)
474 dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
478 ssl_ops = dlsym(dlh, "ustream_ssl_ops");
482 ssl_ctx = ssl_ops->context_new(false);
485 static int no_ssl(const char *progname)
487 fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
492 L_NO_CHECK_CERTIFICATE,
505 static const struct option longopts[] = {
506 [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
507 [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
508 [L_USER] = { "user", required_argument },
509 [L_PASSWORD] = { "password", required_argument },
510 [L_USER_AGENT] = { "user-agent", required_argument },
511 [L_POST_DATA] = { "post-data", required_argument },
512 [L_SPIDER] = { "spider", no_argument },
513 [L_TIMEOUT] = { "timeout", required_argument },
514 [L_CONTINUE] = { "continue", no_argument },
515 [L_PROXY] = { "proxy", required_argument },
516 [L_NO_PROXY] = { "no-proxy", no_argument },
522 int main(int argc, char **argv)
524 const char *progname = argv[0];
525 const char *proxy_url;
526 char *username = NULL;
527 char *password = NULL;
530 bool has_cert = false;
534 signal(SIGPIPE, SIG_IGN);
537 while ((ch = getopt_long(argc, argv, "cO:P:qsT:U:Y:", longopts, &longopt_idx)) != -1) {
540 switch (longopt_idx) {
541 case L_NO_CHECK_CERTIFICATE:
544 case L_CA_CERTIFICATE:
547 ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
552 username = strdup(optarg);
553 memset(optarg, '*', strlen(optarg));
558 password = strdup(optarg);
559 memset(optarg, '*', strlen(optarg));
571 timeout = atoi(optarg);
577 if (strcmp(optarg, "on") != 0)
584 return usage(progname);
594 output_file = optarg;
599 perror("Change output directory");
610 timeout = atoi(optarg);
613 if (strcmp(optarg, "on") != 0)
617 return usage(progname);
624 if (verify && !has_cert)
625 default_certs = true;
628 return usage(progname);
631 for (i = 0; i < argc; i++) {
632 if (!strncmp(argv[i], "https", 5))
633 return no_ssl(progname);
644 asprintf(&auth_str, "%s:%s", username, password);
650 fprintf(stderr, "Downloading '%s'\n", argv[0]);
652 proxy_url = get_proxy_url(argv[0]);
654 cl = uclient_new(proxy_url, auth_str, &cb);
655 uclient_set_proxy_url(cl, argv[0], NULL);
657 cl = uclient_new(argv[0], auth_str, &cb);
660 fprintf(stderr, "Failed to allocate uclient context\n");
664 if (ssl_ctx && default_certs)
668 rc = init_request(cl);
670 /* no error received, we can enter main loop */
673 fprintf(stderr, "Failed to establish connection\n");
681 if (output_fd >= 0 && output_fd != STDOUT_FILENO)
685 ssl_ops->context_free(ssl_ctx);