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.
30 #include <libubox/blobmsg.h>
33 #include "uclient-utils.h"
36 #define LIB_EXT "dylib"
41 static const char *user_agent = "uclient-fetch";
42 static const char *post_data;
43 static struct ustream_ssl_ctx *ssl_ctx;
44 static const struct ustream_ssl_ops *ssl_ops;
45 static int quiet = false;
46 static bool verify = true;
47 static bool default_certs = false;
48 static bool no_output;
49 static const char *output_file;
50 static int output_fd = -1;
53 static char *username;
54 static char *password;
55 static char *auth_str;
59 static bool resume, cur_resume;
61 static int init_request(struct uclient *cl);
62 static void request_done(struct uclient *cl);
64 static int open_output_file(const char *path, uint64_t resume_offset)
66 char *filename = NULL;
73 flags = O_WRONLY | O_EXCL;
78 if (!strcmp(output_file, "-")) {
80 fprintf(stderr, "Writing to stdout\n");
85 filename = uclient_get_url_filename(path, "index.html");
86 output_file = filename;
90 fprintf(stderr, "Writing to '%s'\n", output_file);
91 ret = open(output_file, flags, 0644);
98 lseek(ret, resume_offset, SEEK_SET) < 0) {
100 fprintf(stderr, "Failed to seek %"PRIu64" bytes in output file\n", resume_offset);
105 out_bytes += resume_offset;
110 static void header_done_cb(struct uclient *cl)
112 static const struct blobmsg_policy policy = {
113 .name = "content-range",
114 .type = BLOBMSG_TYPE_STRING
116 struct blob_attr *attr;
117 uint64_t resume_offset = 0, resume_end, resume_size;
120 if (retries < 10 && uclient_http_redirect(cl)) {
122 fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
128 if (cl->status_code == 204 && cur_resume) {
129 /* Resume attempt failed, try normal download */
135 switch (cl->status_code) {
138 fprintf(stderr, "File download already fully retrieved; nothing to do.\n");
144 fprintf(stderr, "Error: Partial content received, full content requested\n");
150 blobmsg_parse(&policy, 1, &attr, blob_data(cl->meta), blob_len(cl->meta));
153 fprintf(stderr, "Content-Range header is missing\n");
158 if (sscanf(blobmsg_get_string(attr), "bytes %"PRIu64"-%"PRIu64"/%"PRIu64,
159 &resume_offset, &resume_end, &resume_size) != 3) {
161 fprintf(stderr, "Content-Range header is invalid\n");
169 output_fd = open_output_file(cl->url->location, resume_offset);
172 perror("Cannot open output file");
180 fprintf(stderr, "HTTP error %d\n", cl->status_code);
187 static void read_data_cb(struct uclient *cl)
192 if (!no_output && output_fd < 0)
196 len = uclient_read(cl, buf, sizeof(buf));
202 write(output_fd, buf, len);
206 static void msg_connecting(struct uclient *cl)
208 char addr[INET6_ADDRSTRLEN];
214 uclient_get_addr(addr, &port, &cl->remote_addr);
215 fprintf(stderr, "Connecting to %s:%d\n", addr, port);
218 static void check_resume_offset(struct uclient *cl)
225 file = uclient_get_url_filename(cl->url->location, "index.html");
229 ret = stat(file, &st);
237 snprintf(range_str, sizeof(range_str), "bytes=%"PRIu64"-", (uint64_t) st.st_size);
238 uclient_http_set_header(cl, "Range", range_str);
241 static int init_request(struct uclient *cl)
246 uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
249 cl->timeout_msecs = timeout * 1000;
251 rc = uclient_connect(cl);
257 rc = uclient_http_set_request_type(cl, post_data ? "POST" : "GET");
261 uclient_http_reset_headers(cl);
262 uclient_http_set_header(cl, "User-Agent", user_agent);
264 check_resume_offset(cl);
267 uclient_http_set_header(cl, "Content-Type", "application/x-www-form-urlencoded");
268 uclient_write(cl, post_data, strlen(post_data));
271 rc = uclient_request(cl);
278 static void request_done(struct uclient *cl)
281 uclient_set_url(cl, *urls, auth_str);
284 error_ret = init_request(cl);
289 if (output_fd >= 0 && !output_file) {
293 uclient_disconnect(cl);
298 static void eof_cb(struct uclient *cl)
302 fprintf(stderr, "Connection reset prematurely\n");
305 fprintf(stderr, "Download completed (%d bytes)\n", out_bytes);
310 static void handle_uclient_error(struct uclient *cl, int code)
312 const char *type = "Unknown error";
316 case UCLIENT_ERROR_CONNECT:
317 type = "Connection failed";
320 case UCLIENT_ERROR_TIMEDOUT:
321 type = "Connection timed out";
324 case UCLIENT_ERROR_SSL_INVALID_CERT:
325 type = "Invalid SSL certificate";
329 case UCLIENT_ERROR_SSL_CN_MISMATCH:
330 type = "Server hostname does not match SSL certificate";
340 fprintf(stderr, "Connection error: %s%s\n", type, ignore ? " (ignored)" : "");
348 static const struct uclient_cb cb = {
349 .header_done = header_done_cb,
350 .data_read = read_data_cb,
352 .error = handle_uclient_error,
355 static int usage(const char *progname)
358 "Usage: %s [options] <URL>\n"
360 " -q: Turn off status messages\n"
361 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
362 " --user=<user> HTTP authentication username\n"
363 " --password=<password> HTTP authentication password\n"
364 " --user-agent|-U <str> Set HTTP user agent\n"
365 " --post-data=STRING use the POST method; send STRING as the data\n"
366 " --spider|-s Spider mode - only check file existence\n"
367 " --timeout=N|-T N Set connect/request timeout to N seconds\n"
370 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
371 " --no-check-certificate: don't validate the server's certificate\n"
376 static void init_ca_cert(void)
381 glob("/etc/ssl/certs/*.crt", 0, NULL, &gl);
382 for (i = 0; i < gl.gl_pathc; i++)
383 ssl_ops->context_add_ca_crt_file(ssl_ctx, gl.gl_pathv[i]);
386 static void init_ustream_ssl(void)
390 dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
394 ssl_ops = dlsym(dlh, "ustream_ssl_ops");
398 ssl_ctx = ssl_ops->context_new(false);
401 static int no_ssl(const char *progname)
403 fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
408 L_NO_CHECK_CERTIFICATE,
419 static const struct option longopts[] = {
420 [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
421 [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
422 [L_USER] = { "user", required_argument },
423 [L_PASSWORD] = { "password", required_argument },
424 [L_USER_AGENT] = { "user-agent", required_argument },
425 [L_POST_DATA] = { "post-data", required_argument },
426 [L_SPIDER] = { "spider", no_argument },
427 [L_TIMEOUT] = { "timeout", required_argument },
428 [L_CONTINUE] = { "continue", no_argument },
434 int main(int argc, char **argv)
436 const char *progname = argv[0];
439 bool has_cert = false;
445 while ((ch = getopt_long(argc, argv, "cO:qsU:", longopts, &longopt_idx)) != -1) {
448 switch (longopt_idx) {
449 case L_NO_CHECK_CERTIFICATE:
452 case L_CA_CERTIFICATE:
455 ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
460 username = strdup(optarg);
461 memset(optarg, '*', strlen(optarg));
466 password = strdup(optarg);
467 memset(optarg, '*', strlen(optarg));
479 timeout = atoi(optarg);
485 return usage(progname);
495 output_file = optarg;
504 timeout = atoi(optarg);
507 return usage(progname);
514 if (verify && !has_cert)
515 default_certs = true;
518 return usage(progname);
521 for (i = 0; i < argc; i++) {
522 if (!strncmp(argv[i], "https", 5))
523 return no_ssl(progname);
534 asprintf(&auth_str, "%s:%s", username, password);
540 fprintf(stderr, "Downloading '%s'\n", argv[0]);
542 cl = uclient_new(argv[0], auth_str, &cb);
544 fprintf(stderr, "Failed to allocate uclient context\n");
548 if (ssl_ctx && default_certs)
552 rc = init_request(cl);
554 /* no error received, we can enter main loop */
557 fprintf(stderr, "Failed to establish connection\n");
565 if (output_fd >= 0 && output_fd != STDOUT_FILENO)
569 ssl_ops->context_free(ssl_ctx);