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>
31 #include <libubox/blobmsg.h>
35 #include "uclient-utils.h"
38 #define strdupa(x) strcpy(alloca(strlen(x)+1),x)
41 static const char *user_agent
= "uclient-fetch";
42 static const char *post_data
;
43 static const char *post_file
;
44 static struct ustream_ssl_ctx
*ssl_ctx
;
45 static const struct ustream_ssl_ops
*ssl_ops
;
46 static int quiet
= false;
47 static bool verify
= true;
48 static bool proxy
= true;
49 static bool default_certs
= false;
50 static bool no_output
;
51 static const char *opt_output_file
;
52 static int output_fd
= -1;
54 static off_t out_offset
;
55 static off_t out_bytes
;
57 static char *auth_str
;
61 static bool resume
, cur_resume
;
63 static struct progress pmt
;
64 static struct uloop_timeout pmt_timer
;
66 static int init_request(struct uclient
*cl
);
67 static void request_done(struct uclient
*cl
);
69 static void pmt_update(struct uloop_timeout
*t
)
71 progress_update(&pmt
, out_offset
, out_bytes
, out_len
);
72 uloop_timeout_set(t
, 1000);
76 get_proxy_url(char *url
)
84 sep
= strchr(url
, ':');
91 memcpy(prefix
, url
, sep
- url
);
92 strcpy(prefix
+ (sep
- url
), "_proxy");
93 return getenv(prefix
);
96 static int open_output_file(const char *path
, uint64_t resume_offset
)
98 const char *output_file
= opt_output_file
;
99 char *filename
= NULL
;
106 flags
= O_WRONLY
| O_TRUNC
;
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");
128 output_file
= filename
;
132 fprintf(stderr
, "Writing to '%s'\n", output_file
);
133 ret
= open(output_file
, flags
, 0644);
138 lseek(ret
, resume_offset
, SEEK_SET
) < 0) {
140 fprintf(stderr
, "Failed to seek %"PRIu64
" bytes in output file\n", resume_offset
);
146 out_offset
= resume_offset
;
147 out_bytes
+= resume_offset
;
150 progress_init(&pmt
, output_file
);
151 pmt_timer
.cb
= pmt_update
;
152 pmt_timer
.cb(&pmt_timer
);
161 static void header_done_cb(struct uclient
*cl
)
168 static const struct blobmsg_policy policy
[__H_MAX
] = {
169 [H_RANGE
] = { .name
= "content-range", .type
= BLOBMSG_TYPE_STRING
},
170 [H_LEN
] = { .name
= "content-length", .type
= BLOBMSG_TYPE_STRING
},
172 struct blob_attr
*tb
[__H_MAX
];
173 uint64_t resume_offset
= 0, resume_end
, resume_size
;
177 int ret
= uclient_http_redirect(cl
);
180 fprintf(stderr
, "Failed to redirect to %s on %s\n", cl
->url
->location
, cl
->url
->host
);
187 fprintf(stderr
, "Redirected to %s on %s\n", cl
->url
->location
, cl
->url
->host
);
194 if (cl
->status_code
== 204 && cur_resume
) {
195 /* Resume attempt failed, try normal download */
201 blobmsg_parse(policy
, __H_MAX
, tb
, blob_data(cl
->meta
), blob_len(cl
->meta
));
203 switch (cl
->status_code
) {
206 fprintf(stderr
, "File download already fully retrieved; nothing to do.\n");
212 fprintf(stderr
, "Error: Partial content received, full content requested\n");
220 fprintf(stderr
, "Content-Range header is missing\n");
225 if (sscanf(blobmsg_get_string(tb
[H_RANGE
]),
226 "bytes %"PRIu64
"-%"PRIu64
"/%"PRIu64
,
227 &resume_offset
, &resume_end
, &resume_size
) != 3) {
229 fprintf(stderr
, "Content-Range header is invalid\n");
240 out_len
= strtoul(blobmsg_get_string(tb
[H_LEN
]), NULL
, 10);
242 output_fd
= open_output_file(cl
->url
->location
, resume_offset
);
245 perror("Cannot open output file");
253 fprintf(stderr
, "HTTP error %d\n", cl
->status_code
);
260 static void read_data_cb(struct uclient
*cl
)
266 if (!no_output
&& output_fd
< 0)
270 len
= uclient_read(cl
, buf
, sizeof(buf
));
276 n
= write(output_fd
, buf
, len
);
283 static void msg_connecting(struct uclient
*cl
)
285 char addr
[INET6_ADDRSTRLEN
];
291 uclient_get_addr(addr
, &port
, &cl
->remote_addr
);
292 fprintf(stderr
, "Connecting to %s:%d\n", addr
, port
);
295 static void check_resume_offset(struct uclient
*cl
)
302 file
= uclient_get_url_filename(cl
->url
->location
, "index.html");
306 ret
= stat(file
, &st
);
314 snprintf(range_str
, sizeof(range_str
), "bytes=%"PRIu64
"-", (uint64_t) st
.st_size
);
315 uclient_http_set_header(cl
, "Range", range_str
);
318 static int init_request(struct uclient
*cl
)
325 uclient_http_set_ssl_ctx(cl
, ssl_ops
, ssl_ctx
, verify
);
328 cl
->timeout_msecs
= timeout
* 1000;
330 rc
= uclient_connect(cl
);
336 rc
= uclient_http_set_request_type(cl
, post_data
|| post_file
? "POST" : "GET");
340 uclient_http_reset_headers(cl
);
341 uclient_http_set_header(cl
, "User-Agent", user_agent
);
343 check_resume_offset(cl
);
346 uclient_http_set_header(cl
, "Content-Type", "application/x-www-form-urlencoded");
347 uclient_write(cl
, post_data
, strlen(post_data
));
352 uclient_http_set_header(cl
, "Content-Type", "application/x-www-form-urlencoded");
354 input_file
= fopen(post_file
, "r");
362 rlen
= fread(tbuf
, 1, sizeof(tbuf
), input_file
);
363 uclient_write(cl
, tbuf
, rlen
);
370 rc
= uclient_request(cl
);
377 static void request_done(struct uclient
*cl
)
379 const char *proxy_url
;
382 proxy_url
= get_proxy_url(*urls
);
384 uclient_set_url(cl
, proxy_url
, NULL
);
385 uclient_set_proxy_url(cl
, *urls
, auth_str
);
387 uclient_set_url(cl
, *urls
, auth_str
);
391 error_ret
= init_request(cl
);
396 if (output_fd
>= 0 && !opt_output_file
) {
400 uclient_disconnect(cl
);
405 static void eof_cb(struct uclient
*cl
)
408 pmt_update(&pmt_timer
);
409 uloop_timeout_cancel(&pmt_timer
);
410 fprintf(stderr
, "\n");
415 fprintf(stderr
, "Connection reset prematurely\n");
418 fprintf(stderr
, "Download completed (%"PRIu64
" bytes)\n", (uint64_t) out_bytes
);
424 handle_uclient_log_msg(struct uclient
*cl
, enum uclient_log_type type
, const char *msg
)
426 static const char * const type_str_list
[] = {
427 [UCLIENT_LOG_SSL_ERROR
] = "SSL error",
428 [UCLIENT_LOG_SSL_VERIFY_ERROR
] = "SSL verify error",
430 const char *type_str
= NULL
;
432 if (type
< ARRAY_SIZE(type_str_list
))
433 type_str
= type_str_list
[type
];
435 type_str
= "Unknown";
437 fprintf(stderr
, "%s: %s\n", type_str
, msg
);
440 static void handle_uclient_error(struct uclient
*cl
, int code
)
442 const char *type
= "Unknown error";
446 case UCLIENT_ERROR_CONNECT
:
447 type
= "Connection failed";
450 case UCLIENT_ERROR_TIMEDOUT
:
451 type
= "Connection timed out";
454 case UCLIENT_ERROR_SSL_INVALID_CERT
:
455 type
= "Invalid SSL certificate";
459 case UCLIENT_ERROR_SSL_CN_MISMATCH
:
460 type
= "Server hostname does not match SSL certificate";
470 fprintf(stderr
, "Connection error: %s%s\n", type
, ignore
? " (ignored)" : "");
478 static const struct uclient_cb cb
= {
479 .header_done
= header_done_cb
,
480 .data_read
= read_data_cb
,
482 .error
= handle_uclient_error
,
483 .log_msg
= handle_uclient_log_msg
,
486 static int usage(const char *progname
)
489 "Usage: %s [options] <URL>\n"
491 " -4 Use IPv4 only\n"
492 " -6 Use IPv6 only\n"
493 " -O <file> Redirect output to file (use \"-\" for stdout)\n"
494 " -P <dir> Set directory for output files\n"
495 " --quiet | -q Turn off status messages\n"
496 " --continue | -c Continue a partially-downloaded file\n"
497 " --user=<user> HTTP authentication username\n"
498 " --password=<password> HTTP authentication password\n"
499 " --user-agent | -U <str> Set HTTP user agent\n"
500 " --post-data=STRING use the POST method; send STRING as the data\n"
501 " --post-file=FILE use the POST method; send FILE as the data\n"
502 " --spider | -s Spider mode - only check file existence\n"
503 " --timeout=N | -T N Set connect/request timeout to N seconds\n"
504 " --proxy=on | -Y on Enable interpretation of proxy env vars (default)\n"
505 " --proxy=off | -Y off |\n"
506 " --no-proxy Disable interpretation of proxy env vars\n"
509 " --ca-certificate=<cert> Load CA certificates from file <cert>\n"
510 " --no-check-certificate don't validate the server's certificate\n"
511 " --ciphers=<cipherlist> Set the cipher list string\n"
516 static void init_ca_cert(void)
521 glob("/etc/ssl/certs/*.crt", 0, NULL
, &gl
);
522 for (i
= 0; i
< gl
.gl_pathc
; i
++)
523 ssl_ops
->context_add_ca_crt_file(ssl_ctx
, gl
.gl_pathv
[i
]);
527 static int no_ssl(const char *progname
)
530 "%s: SSL support not available, please install one of the "
531 "libustream-.*[ssl|tls] packages as well as the ca-bundle and "
532 "ca-certificates packages.\n",
538 static void debug_cb(void *priv
, int level
, const char *msg
)
540 fprintf(stderr
, "%s\n", msg
);
544 L_NO_CHECK_CERTIFICATE
,
561 static const struct option longopts
[] = {
562 [L_NO_CHECK_CERTIFICATE
] = { "no-check-certificate", no_argument
, NULL
, 0 },
563 [L_CA_CERTIFICATE
] = { "ca-certificate", required_argument
, NULL
, 0 },
564 [L_CIPHERS
] = { "ciphers", required_argument
, NULL
, 0 },
565 [L_USER
] = { "user", required_argument
, NULL
, 0 },
566 [L_PASSWORD
] = { "password", required_argument
, NULL
, 0 },
567 [L_USER_AGENT
] = { "user-agent", required_argument
, NULL
, 0 },
568 [L_POST_DATA
] = { "post-data", required_argument
, NULL
, 0 },
569 [L_POST_FILE
] = { "post-file", required_argument
, NULL
, 0 },
570 [L_SPIDER
] = { "spider", no_argument
, NULL
, 0 },
571 [L_TIMEOUT
] = { "timeout", required_argument
, NULL
, 0 },
572 [L_CONTINUE
] = { "continue", no_argument
, NULL
, 0 },
573 [L_PROXY
] = { "proxy", required_argument
, NULL
, 0 },
574 [L_NO_PROXY
] = { "no-proxy", no_argument
, NULL
, 0 },
575 [L_QUIET
] = { "quiet", no_argument
, NULL
, 0 },
576 [L_VERBOSE
] = { "verbose", no_argument
, NULL
, 0 },
582 int main(int argc
, char **argv
)
584 const char *progname
= argv
[0];
585 const char *proxy_url
;
586 char *username
= NULL
;
587 char *password
= NULL
;
590 bool has_cert
= false;
596 signal(SIGPIPE
, SIG_IGN
);
597 ssl_ctx
= uclient_new_ssl_context(&ssl_ops
);
599 while ((ch
= getopt_long(argc
, argv
, "46cO:P:qsT:U:vY:", longopts
, &longopt_idx
)) != -1) {
602 switch (longopt_idx
) {
603 case L_NO_CHECK_CERTIFICATE
:
606 ssl_ops
->context_set_require_validation(ssl_ctx
, verify
);
608 case L_CA_CERTIFICATE
:
611 ssl_ops
->context_add_ca_crt_file(ssl_ctx
, optarg
);
615 if (ssl_ops
->context_set_ciphers(ssl_ctx
, optarg
)) {
617 fprintf(stderr
, "No recognized ciphers in cipher list\n");
625 username
= strdupa(optarg
);
626 memset(optarg
, '*', strlen(optarg
));
631 password
= strdupa(optarg
);
632 memset(optarg
, '*', strlen(optarg
));
647 timeout
= atoi(optarg
);
653 if (strcmp(optarg
, "on") != 0)
666 return usage(progname
);
682 opt_output_file
= optarg
;
687 perror("Change output directory");
698 timeout
= atoi(optarg
);
704 if (strcmp(optarg
, "on") != 0)
708 return usage(progname
);
716 ssl_ops
->context_set_debug(ssl_ctx
, debug_level
, debug_cb
, NULL
);
718 if (verify
&& !has_cert
)
719 default_certs
= true;
722 return usage(progname
);
725 for (i
= 0; i
< argc
; i
++) {
726 if (!strncmp(argv
[i
], "https", 5))
727 return no_ssl(progname
);
738 rc
= asprintf(&auth_str
, "%s:%s", username
, password
);
746 fprintf(stderr
, "Downloading '%s'\n", argv
[0]);
748 proxy_url
= get_proxy_url(argv
[0]);
750 cl
= uclient_new(proxy_url
, auth_str
, &cb
);
752 uclient_set_proxy_url(cl
, argv
[0], NULL
);
754 cl
= uclient_new(argv
[0], auth_str
, &cb
);
757 fprintf(stderr
, "Failed to allocate uclient context\n");
761 uclient_http_set_address_family(cl
, af
);
763 if (ssl_ctx
&& default_certs
)
767 rc
= init_request(cl
);
769 /* no error received, we can enter main loop */
772 fprintf(stderr
, "Failed to send request: %s\n", strerror(rc
));
780 if (output_fd
>= 0 && output_fd
!= STDOUT_FILENO
)
784 ssl_ops
->context_free(ssl_ctx
);