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 proxy
= true;
48 static bool default_certs
= false;
49 static bool no_output
;
50 static const char *output_file
;
51 static int output_fd
= -1;
54 static char *auth_str
;
58 static bool resume
, cur_resume
;
60 static int init_request(struct uclient
*cl
);
61 static void request_done(struct uclient
*cl
);
64 get_proxy_url(char *url
)
72 sep
= strchr(url
, ':');
79 memcpy(prefix
, url
, sep
- url
);
80 strcpy(prefix
+ (sep
- url
), "_proxy");
81 return getenv(prefix
);
84 static int open_output_file(const char *path
, uint64_t resume_offset
)
86 char *filename
= NULL
;
93 flags
= O_WRONLY
| O_EXCL
;
98 if (!strcmp(output_file
, "-")) {
100 fprintf(stderr
, "Writing to stdout\n");
102 return STDOUT_FILENO
;
105 filename
= uclient_get_url_filename(path
, "index.html");
106 output_file
= filename
;
110 fprintf(stderr
, "Writing to '%s'\n", output_file
);
111 ret
= open(output_file
, flags
, 0644);
118 lseek(ret
, resume_offset
, SEEK_SET
) < 0) {
120 fprintf(stderr
, "Failed to seek %"PRIu64
" bytes in output file\n", resume_offset
);
125 out_bytes
+= resume_offset
;
130 static void header_done_cb(struct uclient
*cl
)
132 static const struct blobmsg_policy policy
= {
133 .name
= "content-range",
134 .type
= BLOBMSG_TYPE_STRING
136 struct blob_attr
*attr
;
137 uint64_t resume_offset
= 0, resume_end
, resume_size
;
140 if (retries
< 10 && uclient_http_redirect(cl
)) {
142 fprintf(stderr
, "Redirected to %s on %s\n", cl
->url
->location
, cl
->url
->host
);
148 if (cl
->status_code
== 204 && cur_resume
) {
149 /* Resume attempt failed, try normal download */
155 switch (cl
->status_code
) {
158 fprintf(stderr
, "File download already fully retrieved; nothing to do.\n");
164 fprintf(stderr
, "Error: Partial content received, full content requested\n");
170 blobmsg_parse(&policy
, 1, &attr
, blob_data(cl
->meta
), blob_len(cl
->meta
));
173 fprintf(stderr
, "Content-Range header is missing\n");
178 if (sscanf(blobmsg_get_string(attr
), "bytes %"PRIu64
"-%"PRIu64
"/%"PRIu64
,
179 &resume_offset
, &resume_end
, &resume_size
) != 3) {
181 fprintf(stderr
, "Content-Range header is invalid\n");
189 output_fd
= open_output_file(cl
->url
->location
, resume_offset
);
192 perror("Cannot open output file");
200 fprintf(stderr
, "HTTP error %d\n", cl
->status_code
);
207 static void read_data_cb(struct uclient
*cl
)
212 if (!no_output
&& output_fd
< 0)
216 len
= uclient_read(cl
, buf
, sizeof(buf
));
222 write(output_fd
, buf
, len
);
226 static void msg_connecting(struct uclient
*cl
)
228 char addr
[INET6_ADDRSTRLEN
];
234 uclient_get_addr(addr
, &port
, &cl
->remote_addr
);
235 fprintf(stderr
, "Connecting to %s:%d\n", addr
, port
);
238 static void check_resume_offset(struct uclient
*cl
)
245 file
= uclient_get_url_filename(cl
->url
->location
, "index.html");
249 ret
= stat(file
, &st
);
257 snprintf(range_str
, sizeof(range_str
), "bytes=%"PRIu64
"-", (uint64_t) st
.st_size
);
258 uclient_http_set_header(cl
, "Range", range_str
);
261 static int init_request(struct uclient
*cl
)
266 uclient_http_set_ssl_ctx(cl
, ssl_ops
, ssl_ctx
, verify
);
269 cl
->timeout_msecs
= timeout
* 1000;
271 rc
= uclient_connect(cl
);
277 rc
= uclient_http_set_request_type(cl
, post_data
? "POST" : "GET");
281 uclient_http_reset_headers(cl
);
282 uclient_http_set_header(cl
, "User-Agent", user_agent
);
284 check_resume_offset(cl
);
287 uclient_http_set_header(cl
, "Content-Type", "application/x-www-form-urlencoded");
288 uclient_write(cl
, post_data
, strlen(post_data
));
291 rc
= uclient_request(cl
);
298 static void request_done(struct uclient
*cl
)
300 const char *proxy_url
;
303 proxy_url
= get_proxy_url(*urls
);
305 uclient_set_url(cl
, proxy_url
, NULL
);
306 uclient_set_proxy_url(cl
, *urls
, auth_str
);
308 uclient_set_url(cl
, *urls
, auth_str
);
312 error_ret
= init_request(cl
);
317 if (output_fd
>= 0 && !output_file
) {
321 uclient_disconnect(cl
);
326 static void eof_cb(struct uclient
*cl
)
330 fprintf(stderr
, "Connection reset prematurely\n");
333 fprintf(stderr
, "Download completed (%d bytes)\n", out_bytes
);
338 static void handle_uclient_error(struct uclient
*cl
, int code
)
340 const char *type
= "Unknown error";
344 case UCLIENT_ERROR_CONNECT
:
345 type
= "Connection failed";
348 case UCLIENT_ERROR_TIMEDOUT
:
349 type
= "Connection timed out";
352 case UCLIENT_ERROR_SSL_INVALID_CERT
:
353 type
= "Invalid SSL certificate";
357 case UCLIENT_ERROR_SSL_CN_MISMATCH
:
358 type
= "Server hostname does not match SSL certificate";
368 fprintf(stderr
, "Connection error: %s%s\n", type
, ignore
? " (ignored)" : "");
376 static const struct uclient_cb cb
= {
377 .header_done
= header_done_cb
,
378 .data_read
= read_data_cb
,
380 .error
= handle_uclient_error
,
383 static int usage(const char *progname
)
386 "Usage: %s [options] <URL>\n"
388 " -q: Turn off status messages\n"
389 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
390 " --user=<user> HTTP authentication username\n"
391 " --password=<password> HTTP authentication password\n"
392 " --user-agent|-U <str> Set HTTP user agent\n"
393 " --post-data=STRING use the POST method; send STRING as the data\n"
394 " --spider|-s Spider mode - only check file existence\n"
395 " --timeout=N|-T N Set connect/request timeout to N seconds\n"
396 " --proxy=on|off|-Y on|off Enable/disable env var configured proxy\n"
399 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
400 " --no-check-certificate: don't validate the server's certificate\n"
405 static void init_ca_cert(void)
410 glob("/etc/ssl/certs/*.crt", 0, NULL
, &gl
);
411 for (i
= 0; i
< gl
.gl_pathc
; i
++)
412 ssl_ops
->context_add_ca_crt_file(ssl_ctx
, gl
.gl_pathv
[i
]);
415 static void init_ustream_ssl(void)
419 dlh
= dlopen("libustream-ssl." LIB_EXT
, RTLD_LAZY
| RTLD_LOCAL
);
423 ssl_ops
= dlsym(dlh
, "ustream_ssl_ops");
427 ssl_ctx
= ssl_ops
->context_new(false);
430 static int no_ssl(const char *progname
)
432 fprintf(stderr
, "%s: SSL support not available, please install ustream-ssl\n", progname
);
437 L_NO_CHECK_CERTIFICATE
,
450 static const struct option longopts
[] = {
451 [L_NO_CHECK_CERTIFICATE
] = { "no-check-certificate", no_argument
},
452 [L_CA_CERTIFICATE
] = { "ca-certificate", required_argument
},
453 [L_USER
] = { "user", required_argument
},
454 [L_PASSWORD
] = { "password", required_argument
},
455 [L_USER_AGENT
] = { "user-agent", required_argument
},
456 [L_POST_DATA
] = { "post-data", required_argument
},
457 [L_SPIDER
] = { "spider", no_argument
},
458 [L_TIMEOUT
] = { "timeout", required_argument
},
459 [L_CONTINUE
] = { "continue", no_argument
},
460 [L_PROXY
] = { "proxy", required_argument
},
461 [L_NO_PROXY
] = { "no-proxy", no_argument
},
467 int main(int argc
, char **argv
)
469 const char *progname
= argv
[0];
470 const char *proxy_url
;
471 char *username
= NULL
;
472 char *password
= NULL
;
475 bool has_cert
= false;
481 while ((ch
= getopt_long(argc
, argv
, "cO:qsU:Y:", longopts
, &longopt_idx
)) != -1) {
484 switch (longopt_idx
) {
485 case L_NO_CHECK_CERTIFICATE
:
488 case L_CA_CERTIFICATE
:
491 ssl_ops
->context_add_ca_crt_file(ssl_ctx
, optarg
);
496 username
= strdup(optarg
);
497 memset(optarg
, '*', strlen(optarg
));
502 password
= strdup(optarg
);
503 memset(optarg
, '*', strlen(optarg
));
515 timeout
= atoi(optarg
);
521 if (strcmp(optarg
, "on") != 0)
528 return usage(progname
);
538 output_file
= optarg
;
547 timeout
= atoi(optarg
);
550 if (strcmp(optarg
, "on") != 0)
554 return usage(progname
);
561 if (verify
&& !has_cert
)
562 default_certs
= true;
565 return usage(progname
);
568 for (i
= 0; i
< argc
; i
++) {
569 if (!strncmp(argv
[i
], "https", 5))
570 return no_ssl(progname
);
581 asprintf(&auth_str
, "%s:%s", username
, password
);
587 fprintf(stderr
, "Downloading '%s'\n", argv
[0]);
589 proxy_url
= get_proxy_url(argv
[0]);
591 cl
= uclient_new(proxy_url
, auth_str
, &cb
);
592 uclient_set_proxy_url(cl
, argv
[0], NULL
);
594 cl
= uclient_new(argv
[0], auth_str
, &cb
);
597 fprintf(stderr
, "Failed to allocate uclient context\n");
601 if (ssl_ctx
&& default_certs
)
605 rc
= init_request(cl
);
607 /* no error received, we can enter main loop */
610 fprintf(stderr
, "Failed to establish connection\n");
618 if (output_fd
>= 0 && output_fd
!= STDOUT_FILENO
)
622 ssl_ops
->context_free(ssl_ctx
);