X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fuclient.git;a=blobdiff_plain;f=uclient-fetch.c;h=6961d94b12408203bc6ce6bb35d5700082dd9717;hp=965f62142e1f9551fb1510692bc71563211783c5;hb=f2573da7f508a916177af41efc56233a4985c498;hpb=b733f729ede556b62ca81714cba05029d9dbafb4

diff --git a/uclient-fetch.c b/uclient-fetch.c
index 965f621..6961d94 100644
--- a/uclient-fetch.c
+++ b/uclient-fetch.c
@@ -17,15 +17,21 @@
  */
 
 #define _GNU_SOURCE
+#include <sys/stat.h>
+#include <sys/socket.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <dlfcn.h>
 #include <getopt.h>
 #include <fcntl.h>
 #include <glob.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <signal.h>
 
 #include <libubox/blobmsg.h>
 
+#include "progress.h"
 #include "uclient.h"
 #include "uclient-utils.h"
 
@@ -35,75 +41,200 @@
 #define LIB_EXT "so"
 #endif
 
+static const char *user_agent = "uclient-fetch";
+static const char *post_data;
 static struct ustream_ssl_ctx *ssl_ctx;
 static const struct ustream_ssl_ops *ssl_ops;
 static int quiet = false;
 static bool verify = true;
+static bool proxy = true;
 static bool default_certs = false;
-static const char *output_file;
+static bool no_output;
+static const char *opt_output_file;
 static int output_fd = -1;
 static int error_ret;
-static int out_bytes;
-static char *username;
-static char *password;
+static off_t out_offset;
+static off_t out_bytes;
+static off_t out_len;
 static char *auth_str;
+static char **urls;
+static int n_urls;
+static int timeout;
+static bool resume, cur_resume;
 
-static int open_output_file(const char *path, bool create)
+static struct progress pmt;
+static struct uloop_timeout pmt_timer;
+
+static int init_request(struct uclient *cl);
+static void request_done(struct uclient *cl);
+
+static void pmt_update(struct uloop_timeout *t)
+{
+	progress_update(&pmt, out_offset, out_bytes, out_len);
+	uloop_timeout_set(t, 1000);
+}
+
+static const char *
+get_proxy_url(char *url)
+{
+	char prefix[16];
+	char *sep;
+
+	if (!proxy)
+		return NULL;
+
+	sep = strchr(url, ':');
+	if (!sep)
+		return NULL;
+
+	if (sep - url > 5)
+		return NULL;
+
+	memcpy(prefix, url, sep - url);
+	strcpy(prefix + (sep - url), "_proxy");
+	return getenv(prefix);
+}
+
+static int open_output_file(const char *path, uint64_t resume_offset)
 {
-	char *filename;
-	int flags = O_WRONLY;
+	const char *output_file = opt_output_file;
+	char *filename = NULL;
+	int flags;
 	int ret;
 
-	if (create)
-		flags |= O_CREAT | O_EXCL;
+	if (cur_resume)
+		flags = O_RDWR;
+	else
+		flags = O_WRONLY | O_TRUNC;
 
-	if (output_file) {
-		if (!strcmp(output_file, "-"))
-			return STDOUT_FILENO;
+	if (!cur_resume && !output_file)
+		flags |= O_EXCL;
 
-		if (!quiet)
-			fprintf(stderr, "Writing to stdout\n");
+	flags |= O_CREAT;
 
-		unlink(output_file);
-		return open(output_file, flags, 0644);
+	if (output_file) {
+		if (!strcmp(output_file, "-")) {
+			if (!quiet)
+				fprintf(stderr, "Writing to stdout\n");
+
+			ret = STDOUT_FILENO;
+			goto done;
+		}
+	} else {
+		filename = uclient_get_url_filename(path, "index.html");
+		output_file = filename;
 	}
 
-	filename = uclient_get_url_filename(path, "index.html");
 	if (!quiet)
-		fprintf(stderr, "Writing to '%s'\n", filename);
-	ret = open(filename, flags, 0644);
-	free(filename);
+		fprintf(stderr, "Writing to '%s'\n", output_file);
+	ret = open(output_file, flags, 0644);
+	if (ret < 0)
+		goto free;
 
-	return ret;
-}
+	if (resume_offset &&
+	    lseek(ret, resume_offset, SEEK_SET) < 0) {
+		if (!quiet)
+			fprintf(stderr, "Failed to seek %"PRIu64" bytes in output file\n", resume_offset);
+		close(ret);
+		ret = -1;
+		goto free;
+	}
 
-static void request_done(struct uclient *cl)
-{
-	if (output_fd >= 0 && !output_file) {
-		close(output_fd);
-		output_fd = -1;
+	out_offset = resume_offset;
+	out_bytes += resume_offset;
+done:
+	if (!quiet) {
+		progress_init(&pmt, output_file);
+		pmt_timer.cb = pmt_update;
+		pmt_timer.cb(&pmt_timer);
 	}
-	uclient_disconnect(cl);
-	uloop_end();
+
+free:
+	free(filename);
+	return ret;
 }
 
 static void header_done_cb(struct uclient *cl)
 {
+	enum {
+		H_RANGE,
+		H_LEN,
+		__H_MAX
+	};
+	static const struct blobmsg_policy policy[__H_MAX] = {
+		[H_RANGE] = { .name = "content-range", .type = BLOBMSG_TYPE_STRING },
+		[H_LEN] = { .name = "content-length", .type = BLOBMSG_TYPE_STRING },
+	};
+	struct blob_attr *tb[__H_MAX];
+	uint64_t resume_offset = 0, resume_end, resume_size;
 	static int retries;
 
-	if (retries < 10 && uclient_http_redirect(cl)) {
-		if (!quiet)
-			fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
+	if (retries < 10) {
+		int ret = uclient_http_redirect(cl);
+		if (ret < 0) {
+			if (!quiet)
+				fprintf(stderr, "Failed to redirect to %s on %s\n", cl->url->location, cl->url->host);
+			error_ret = 8;
+			request_done(cl);
+			return;
+		}
+		if (ret > 0) {
+			if (!quiet)
+				fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
 
-		retries++;
+			retries++;
+			return;
+		}
+	}
+
+	if (cl->status_code == 204 && cur_resume) {
+		/* Resume attempt failed, try normal download */
+		cur_resume = false;
+		init_request(cl);
 		return;
 	}
 
-	retries = 0;
+	blobmsg_parse(policy, __H_MAX, tb, blob_data(cl->meta), blob_len(cl->meta));
+
 	switch (cl->status_code) {
+	case 416:
+		if (!quiet)
+			fprintf(stderr, "File download already fully retrieved; nothing to do.\n");
+		request_done(cl);
+		break;
+	case 206:
+		if (!cur_resume) {
+			if (!quiet)
+				fprintf(stderr, "Error: Partial content received, full content requested\n");
+			error_ret = 8;
+			request_done(cl);
+			break;
+		}
+
+		if (!tb[H_RANGE]) {
+			if (!quiet)
+				fprintf(stderr, "Content-Range header is missing\n");
+			error_ret = 8;
+			break;
+		}
+
+		if (sscanf(blobmsg_get_string(tb[H_RANGE]),
+			   "bytes %"PRIu64"-%"PRIu64"/%"PRIu64,
+			   &resume_offset, &resume_end, &resume_size) != 3) {
+			if (!quiet)
+				fprintf(stderr, "Content-Range header is invalid\n");
+			error_ret = 8;
+			break;
+		}
 	case 204:
 	case 200:
-		output_fd = open_output_file(cl->url->location, true);
+		if (no_output)
+			break;
+
+		if (tb[H_LEN])
+			out_len = strtoul(blobmsg_get_string(tb[H_LEN]), NULL, 10);
+
+		output_fd = open_output_file(cl->url->location, resume_offset);
 		if (output_fd < 0) {
 			if (!quiet)
 				perror("Cannot open output file");
@@ -124,18 +255,23 @@ static void header_done_cb(struct uclient *cl)
 static void read_data_cb(struct uclient *cl)
 {
 	char buf[256];
+	ssize_t n;
 	int len;
 
-	if (output_fd < 0)
+	if (!no_output && output_fd < 0)
 		return;
 
 	while (1) {
 		len = uclient_read(cl, buf, sizeof(buf));
-		if (!len)
+		if (len <= 0)
 			return;
 
 		out_bytes += len;
-		write(output_fd, buf, len);
+		if (!no_output) {
+			n = write(output_fd, buf, len);
+			if (n < 0)
+				return;
+		}
 	}
 }
 
@@ -151,11 +287,40 @@ static void msg_connecting(struct uclient *cl)
 	fprintf(stderr, "Connecting to %s:%d\n", addr, port);
 }
 
+static void check_resume_offset(struct uclient *cl)
+{
+	char range_str[64];
+	struct stat st;
+	char *file;
+	int ret;
+
+	file = uclient_get_url_filename(cl->url->location, "index.html");
+	if (!file)
+		return;
+
+	ret = stat(file, &st);
+	free(file);
+	if (ret)
+		return;
+
+	if (!st.st_size)
+		return;
+
+	snprintf(range_str, sizeof(range_str), "bytes=%"PRIu64"-", (uint64_t) st.st_size);
+	uclient_http_set_header(cl, "Range", range_str);
+}
+
 static int init_request(struct uclient *cl)
 {
 	int rc;
 
+	out_offset = 0;
 	out_bytes = 0;
+	out_len = 0;
+	uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
+
+	if (timeout)
+		cl->timeout_msecs = timeout * 1000;
 
 	rc = uclient_connect(cl);
 	if (rc)
@@ -163,10 +328,20 @@ static int init_request(struct uclient *cl)
 
 	msg_connecting(cl);
 
-	rc = uclient_http_set_request_type(cl, "GET");
+	rc = uclient_http_set_request_type(cl, post_data ? "POST" : "GET");
 	if (rc)
 		return rc;
 
+	uclient_http_reset_headers(cl);
+	uclient_http_set_header(cl, "User-Agent", user_agent);
+	if (cur_resume)
+		check_resume_offset(cl);
+
+	if (post_data) {
+		uclient_http_set_header(cl, "Content-Type", "application/x-www-form-urlencoded");
+		uclient_write(cl, post_data, strlen(post_data));
+	}
+
 	rc = uclient_request(cl);
 	if (rc)
 		return rc;
@@ -174,14 +349,48 @@ static int init_request(struct uclient *cl)
 	return 0;
 }
 
+static void request_done(struct uclient *cl)
+{
+	const char *proxy_url;
+
+	if (n_urls) {
+		proxy_url = get_proxy_url(*urls);
+		if (proxy_url) {
+			uclient_set_url(cl, proxy_url, NULL);
+			uclient_set_proxy_url(cl, *urls, auth_str);
+		} else {
+			uclient_set_url(cl, *urls, auth_str);
+		}
+		n_urls--;
+		cur_resume = resume;
+		error_ret = init_request(cl);
+		if (error_ret == 0)
+			return;
+	}
+
+	if (output_fd >= 0 && !opt_output_file) {
+		close(output_fd);
+		output_fd = -1;
+	}
+	uclient_disconnect(cl);
+	uloop_end();
+}
+
+
 static void eof_cb(struct uclient *cl)
 {
+	if (!quiet) {
+		pmt_update(&pmt_timer);
+		uloop_timeout_cancel(&pmt_timer);
+		fprintf(stderr, "\n");
+	}
+
 	if (!cl->data_eof) {
 		if (!quiet)
 			fprintf(stderr, "Connection reset prematurely\n");
 		error_ret = 4;
 	} else if (!quiet) {
-		fprintf(stderr, "Download completed (%d bytes)\n", out_bytes);
+		fprintf(stderr, "Download completed (%"PRIu64" bytes)\n", (uint64_t) out_bytes);
 	}
 	request_done(cl);
 }
@@ -236,14 +445,22 @@ static int usage(const char *progname)
 	fprintf(stderr,
 		"Usage: %s [options] <URL>\n"
 		"Options:\n"
-		"	-q:                             Turn off status messages\n"
-		"	-O <file>:                      Redirect output to file (use \"-\" for stdout)\n"
+		"	-4				Use IPv4 only\n"
+		"	-6				Use IPv6 only\n"
+		"	-q				Turn off status messages\n"
+		"	-O <file>			Redirect output to file (use \"-\" for stdout)\n"
+		"	-P <dir>			Set directory for output files\n"
 		"	--user=<user>			HTTP authentication username\n"
 		"	--password=<password>		HTTP authentication password\n"
+		"	--user-agent|-U <str>		Set HTTP user agent\n"
+		"	--post-data=STRING		use the POST method; send STRING as the data\n"
+		"	--spider|-s			Spider mode - only check file existence\n"
+		"	--timeout=N|-T N		Set connect/request timeout to N seconds\n"
+		"	--proxy=on|off|-Y on|off	Enable/disable env var configured proxy\n"
 		"\n"
 		"HTTPS options:\n"
-		"	--ca-certificate=<cert>:        Load CA certificates from file <cert>\n"
-		"	--no-check-certificate:         don't validate the server's certificate\n"
+		"	--ca-certificate=<cert>		Load CA certificates from file <cert>\n"
+		"	--no-check-certificate		don't validate the server's certificate\n"
 		"\n", progname);
 	return 1;
 }
@@ -275,7 +492,12 @@ static void init_ustream_ssl(void)
 
 static int no_ssl(const char *progname)
 {
-	fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
+	fprintf(stderr,
+	        "%s: SSL support not available, please install one of the "
+	        "libustream-.*[ssl|tls] packages as well as the ca-bundle and "
+		"ca-certificates packages.\n",
+	        progname);
+
 	return 1;
 }
 
@@ -284,6 +506,14 @@ enum {
 	L_CA_CERTIFICATE,
 	L_USER,
 	L_PASSWORD,
+	L_USER_AGENT,
+	L_POST_DATA,
+	L_SPIDER,
+	L_TIMEOUT,
+	L_CONTINUE,
+	L_PROXY,
+	L_NO_PROXY,
+	L_QUIET,
 };
 
 static const struct option longopts[] = {
@@ -291,21 +521,36 @@ static const struct option longopts[] = {
 	[L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
 	[L_USER] = { "user", required_argument },
 	[L_PASSWORD] = { "password", required_argument },
+	[L_USER_AGENT] = { "user-agent", required_argument },
+	[L_POST_DATA] = { "post-data", required_argument },
+	[L_SPIDER] = { "spider", no_argument },
+	[L_TIMEOUT] = { "timeout", required_argument },
+	[L_CONTINUE] = { "continue", no_argument },
+	[L_PROXY] = { "proxy", required_argument },
+	[L_NO_PROXY] = { "no-proxy", no_argument },
+	[L_QUIET] = { "quiet", no_argument },
 	{}
 };
 
+
+
 int main(int argc, char **argv)
 {
 	const char *progname = argv[0];
+	const char *proxy_url;
+	char *username = NULL;
+	char *password = NULL;
 	struct uclient *cl;
-	int ch;
 	int longopt_idx = 0;
 	bool has_cert = false;
+	int i, ch;
 	int rc;
+	int af = -1;
 
+	signal(SIGPIPE, SIG_IGN);
 	init_ustream_ssl();
 
-	while ((ch = getopt_long(argc, argv, "qO:", longopts, &longopt_idx)) != -1) {
+	while ((ch = getopt_long(argc, argv, "46cO:P:qsT:U:Y:", longopts, &longopt_idx)) != -1) {
 		switch(ch) {
 		case 0:
 			switch (longopt_idx) {
@@ -329,16 +574,70 @@ int main(int argc, char **argv)
 				password = strdup(optarg);
 				memset(optarg, '*', strlen(optarg));
 				break;
+			case L_USER_AGENT:
+				user_agent = optarg;
+				break;
+			case L_POST_DATA:
+				post_data = optarg;
+				break;
+			case L_SPIDER:
+				no_output = true;
+				break;
+			case L_TIMEOUT:
+				timeout = atoi(optarg);
+				break;
+			case L_CONTINUE:
+				resume = true;
+				break;
+			case L_PROXY:
+				if (strcmp(optarg, "on") != 0)
+					proxy = false;
+				break;
+			case L_NO_PROXY:
+				proxy = false;
+				break;
+			case L_QUIET:
+				quiet = true;
+				break;
 			default:
 				return usage(progname);
 			}
 			break;
+		case '4':
+			af = AF_INET;
+			break;
+		case '6':
+			af = AF_INET6;
+			break;
+		case 'c':
+			resume = true;
+			break;
+		case 'U':
+			user_agent = optarg;
+			break;
 		case 'O':
-			output_file = optarg;
+			opt_output_file = optarg;
+			break;
+		case 'P':
+			if (chdir(optarg)) {
+				if (!quiet)
+					perror("Change output directory");
+				exit(1);
+			}
 			break;
 		case 'q':
 			quiet = true;
 			break;
+		case 's':
+			no_output = true;
+			break;
+		case 'T':
+			timeout = atoi(optarg);
+			break;
+		case 'Y':
+			if (strcmp(optarg, "on") != 0)
+				proxy = false;
+			break;
 		default:
 			return usage(progname);
 		}
@@ -350,35 +649,52 @@ int main(int argc, char **argv)
 	if (verify && !has_cert)
 		default_certs = true;
 
-	if (argc != 1)
+	if (argc < 1)
 		return usage(progname);
 
-	if (!strncmp(argv[0], "https", 5) && !ssl_ctx)
-		return no_ssl(progname);
+	if (!ssl_ctx) {
+		for (i = 0; i < argc; i++) {
+			if (!strncmp(argv[i], "https", 5))
+				return no_ssl(progname);
+		}
+	}
+
+	urls = argv + 1;
+	n_urls = argc - 1;
 
 	uloop_init();
 
 	if (username) {
-		if (password)
-			asprintf(&auth_str, "%s:%s", username, password);
-		else
+		if (password) {
+			rc = asprintf(&auth_str, "%s:%s", username, password);
+			if (rc < 0)
+				return rc;
+		} else
 			auth_str = username;
 	}
 
 	if (!quiet)
 		fprintf(stderr, "Downloading '%s'\n", argv[0]);
 
-	cl = uclient_new(argv[0], auth_str, &cb);
+	proxy_url = get_proxy_url(argv[0]);
+	if (proxy_url) {
+		cl = uclient_new(proxy_url, auth_str, &cb);
+		if (cl)
+		    uclient_set_proxy_url(cl, argv[0], NULL);
+	} else {
+		cl = uclient_new(argv[0], auth_str, &cb);
+	}
 	if (!cl) {
 		fprintf(stderr, "Failed to allocate uclient context\n");
 		return 1;
 	}
+	if (af >= 0)
+	    uclient_http_set_address_family(cl, af);
 
-	if (ssl_ctx) {
+	if (ssl_ctx && default_certs)
 		init_ca_cert();
-		uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
-	}
 
+	cur_resume = resume;
 	rc = init_request(cl);
 	if (!rc) {
 		/* no error received, we can enter main loop */