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;
106 flags = O_WRONLY | O_EXCL;
111 if (!strcmp(output_file, "-")) {
113 fprintf(stderr, "Writing to stdout\n");
115 return STDOUT_FILENO;
118 filename = uclient_get_url_filename(path, "index.html");
119 output_file = filename;
123 fprintf(stderr, "Writing to '%s'\n", output_file);
124 ret = open(output_file, flags, 0644);
129 lseek(ret, resume_offset, SEEK_SET) < 0) {
131 fprintf(stderr, "Failed to seek %"PRIu64" bytes in output file\n", resume_offset);
137 out_offset = resume_offset;
138 out_bytes += resume_offset;
140 progress_init(&pmt, output_file);
141 pmt_timer.cb = pmt_update;
142 pmt_timer.cb(&pmt_timer);
150 static void header_done_cb(struct uclient *cl)
157 static const struct blobmsg_policy policy[__H_MAX] = {
158 [H_RANGE] = { .name = "content-range", .type = BLOBMSG_TYPE_STRING },
159 [H_LEN] = { .name = "content-length", .type = BLOBMSG_TYPE_STRING },
161 struct blob_attr *tb[__H_MAX];
162 uint64_t resume_offset = 0, resume_end, resume_size;
165 if (retries < 10 && uclient_http_redirect(cl)) {
167 fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
173 if (cl->status_code == 204 && cur_resume) {
174 /* Resume attempt failed, try normal download */
180 blobmsg_parse(policy, __H_MAX, tb, blob_data(cl->meta), blob_len(cl->meta));
182 switch (cl->status_code) {
185 fprintf(stderr, "File download already fully retrieved; nothing to do.\n");
191 fprintf(stderr, "Error: Partial content received, full content requested\n");
199 fprintf(stderr, "Content-Range header is missing\n");
204 if (sscanf(blobmsg_get_string(tb[H_RANGE]),
205 "bytes %"PRIu64"-%"PRIu64"/%"PRIu64,
206 &resume_offset, &resume_end, &resume_size) != 3) {
208 fprintf(stderr, "Content-Range header is invalid\n");
218 out_len = strtoul(blobmsg_get_string(tb[H_LEN]), NULL, 10);
220 output_fd = open_output_file(cl->url->location, resume_offset);
223 perror("Cannot open output file");
231 fprintf(stderr, "HTTP error %d\n", cl->status_code);
238 static void read_data_cb(struct uclient *cl)
243 if (!no_output && output_fd < 0)
247 len = uclient_read(cl, buf, sizeof(buf));
253 write(output_fd, buf, len);
257 static void msg_connecting(struct uclient *cl)
259 char addr[INET6_ADDRSTRLEN];
265 uclient_get_addr(addr, &port, &cl->remote_addr);
266 fprintf(stderr, "Connecting to %s:%d\n", addr, port);
269 static void check_resume_offset(struct uclient *cl)
276 file = uclient_get_url_filename(cl->url->location, "index.html");
280 ret = stat(file, &st);
288 snprintf(range_str, sizeof(range_str), "bytes=%"PRIu64"-", (uint64_t) st.st_size);
289 uclient_http_set_header(cl, "Range", range_str);
292 static int init_request(struct uclient *cl)
299 uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
302 cl->timeout_msecs = timeout * 1000;
304 rc = uclient_connect(cl);
310 rc = uclient_http_set_request_type(cl, post_data ? "POST" : "GET");
314 uclient_http_reset_headers(cl);
315 uclient_http_set_header(cl, "User-Agent", user_agent);
317 check_resume_offset(cl);
320 uclient_http_set_header(cl, "Content-Type", "application/x-www-form-urlencoded");
321 uclient_write(cl, post_data, strlen(post_data));
324 rc = uclient_request(cl);
331 static void request_done(struct uclient *cl)
333 const char *proxy_url;
336 proxy_url = get_proxy_url(*urls);
338 uclient_set_url(cl, proxy_url, NULL);
339 uclient_set_proxy_url(cl, *urls, auth_str);
341 uclient_set_url(cl, *urls, auth_str);
345 error_ret = init_request(cl);
350 if (output_fd >= 0 && !output_file) {
354 uclient_disconnect(cl);
359 static void eof_cb(struct uclient *cl)
362 pmt_update(&pmt_timer);
363 uloop_timeout_cancel(&pmt_timer);
368 fprintf(stderr, "Connection reset prematurely\n");
371 fprintf(stderr, "Download completed (%"PRIu64" bytes)\n", (uint64_t) out_bytes);
376 static void handle_uclient_error(struct uclient *cl, int code)
378 const char *type = "Unknown error";
382 case UCLIENT_ERROR_CONNECT:
383 type = "Connection failed";
386 case UCLIENT_ERROR_TIMEDOUT:
387 type = "Connection timed out";
390 case UCLIENT_ERROR_SSL_INVALID_CERT:
391 type = "Invalid SSL certificate";
395 case UCLIENT_ERROR_SSL_CN_MISMATCH:
396 type = "Server hostname does not match SSL certificate";
406 fprintf(stderr, "Connection error: %s%s\n", type, ignore ? " (ignored)" : "");
414 static const struct uclient_cb cb = {
415 .header_done = header_done_cb,
416 .data_read = read_data_cb,
418 .error = handle_uclient_error,
421 static int usage(const char *progname)
424 "Usage: %s [options] <URL>\n"
426 " -q: Turn off status messages\n"
427 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
428 " -P <dir>: Set directory for output files\n"
429 " --user=<user> HTTP authentication username\n"
430 " --password=<password> HTTP authentication password\n"
431 " --user-agent|-U <str> Set HTTP user agent\n"
432 " --post-data=STRING use the POST method; send STRING as the data\n"
433 " --spider|-s Spider mode - only check file existence\n"
434 " --timeout=N|-T N Set connect/request timeout to N seconds\n"
435 " --proxy=on|off|-Y on|off Enable/disable env var configured proxy\n"
438 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
439 " --no-check-certificate: don't validate the server's certificate\n"
444 static void init_ca_cert(void)
449 glob("/etc/ssl/certs/*.crt", 0, NULL, &gl);
450 for (i = 0; i < gl.gl_pathc; i++)
451 ssl_ops->context_add_ca_crt_file(ssl_ctx, gl.gl_pathv[i]);
454 static void init_ustream_ssl(void)
458 dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
462 ssl_ops = dlsym(dlh, "ustream_ssl_ops");
466 ssl_ctx = ssl_ops->context_new(false);
469 static int no_ssl(const char *progname)
471 fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
476 L_NO_CHECK_CERTIFICATE,
489 static const struct option longopts[] = {
490 [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
491 [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
492 [L_USER] = { "user", required_argument },
493 [L_PASSWORD] = { "password", required_argument },
494 [L_USER_AGENT] = { "user-agent", required_argument },
495 [L_POST_DATA] = { "post-data", required_argument },
496 [L_SPIDER] = { "spider", no_argument },
497 [L_TIMEOUT] = { "timeout", required_argument },
498 [L_CONTINUE] = { "continue", no_argument },
499 [L_PROXY] = { "proxy", required_argument },
500 [L_NO_PROXY] = { "no-proxy", no_argument },
506 int main(int argc, char **argv)
508 const char *progname = argv[0];
509 const char *proxy_url;
510 char *username = NULL;
511 char *password = NULL;
514 bool has_cert = false;
518 signal(SIGPIPE, SIG_IGN);
521 while ((ch = getopt_long(argc, argv, "cO:P:qsU:Y:", longopts, &longopt_idx)) != -1) {
524 switch (longopt_idx) {
525 case L_NO_CHECK_CERTIFICATE:
528 case L_CA_CERTIFICATE:
531 ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
536 username = strdup(optarg);
537 memset(optarg, '*', strlen(optarg));
542 password = strdup(optarg);
543 memset(optarg, '*', strlen(optarg));
555 timeout = atoi(optarg);
561 if (strcmp(optarg, "on") != 0)
568 return usage(progname);
578 output_file = optarg;
583 perror("Change output directory");
594 timeout = atoi(optarg);
597 if (strcmp(optarg, "on") != 0)
601 return usage(progname);
608 if (verify && !has_cert)
609 default_certs = true;
612 return usage(progname);
615 for (i = 0; i < argc; i++) {
616 if (!strncmp(argv[i], "https", 5))
617 return no_ssl(progname);
628 asprintf(&auth_str, "%s:%s", username, password);
634 fprintf(stderr, "Downloading '%s'\n", argv[0]);
636 proxy_url = get_proxy_url(argv[0]);
638 cl = uclient_new(proxy_url, auth_str, &cb);
639 uclient_set_proxy_url(cl, argv[0], NULL);
641 cl = uclient_new(argv[0], auth_str, &cb);
644 fprintf(stderr, "Failed to allocate uclient context\n");
648 if (ssl_ctx && default_certs)
652 rc = init_request(cl);
654 /* no error received, we can enter main loop */
657 fprintf(stderr, "Failed to establish connection\n");
665 if (output_fd >= 0 && output_fd != STDOUT_FILENO)
669 ssl_ops->context_free(ssl_ctx);