1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
64  * Base64 encode a string; the string returned, if non-NULL, is
81 	 * Encoded length is 4 characters per 3-byte block or partial  in b64enc()
85 	if (ptlen > ((SIZE_MAX - 1) / 4) * 3 - 2)  in b64enc()
90 	ctext[ctlen - 1] = 0;  in b64enc()
96 	for (pt = ptext, pc = ctext; ptlen; ptlen -= 3, pc += 4) {  in b64enc()
171 		asprintf(&proxyauth, "Proxy-Authorization: Basic %s\r\n",  in readenv()
190 			warnx("HTTP_TIMEOUT (%s) is not a positive integer",  in readenv()
205 	    "User-Agent: %s\r\n"  in makerequest()
213 	    connclose ? "Connection: Close\r\n" : "Connection: Keep-Alive\r\n");  in makerequest()
214 	if (buflen == -1)  in makerequest()
225 	    *resbuflen - *resbufpos) == NULL) {  in readln()
226 		/* Move buffered data to the start of the buffer */  in readln()
229 			    *resbuflen - *resbufpos);  in readln()
230 			*resbuflen -= *resbufpos;  in readln()
236 			return -1;  in readln()
239 		len = recv(sd, resbuf + *resbuflen, BUFSIZ - *resbuflen, 0);  in readln()
241 		    ((len == -1) && (errno != EINTR)))  in readln()
242 			return -1;  in readln()
244 		if (len != -1)  in readln()
259 		len = *resbuflen - *resbufpos;  in copybytes()
263 			if (fd != -1)  in copybytes()
265 			if (len == -1)  in copybytes()
268 			copylen -= len;  in copybytes()
274 		if (len == -1) {  in copybytes()
277 			return -1;  in copybytes()
279 			return -2;  in copybytes()
309 	int keepalive;		/* != 0 if HTTP/1.0 keep-alive rcvd. */  in main()
310 	int sd = -1;		/* Socket descriptor */  in main()
312 	int fd = -1;		/* Descriptor for download target file */  in main()
315 	off_t contentlength;	/* Value from Content-Length header */  in main()
316 	int chunked;		/* != if transfer-encoding is chunked */  in main()
331 	argc -= 2;  in main()
356 		for (; sd == -1; res = res->ai_next) {  in main()
357 			/* No addresses left to try :-( */  in main()
362 			sd = socket(res->ai_family, res->ai_socktype,  in main()
363 			    res->ai_protocol);  in main()
364 			if (sd == -1)  in main()
367 			/* ... set 15-second timeouts ... */  in main()
379 			if(connect(sd, res->ai_addr, res->ai_addrlen)) {  in main()
381 				sd = -1;  in main()
389 		 * If in pipelined HTTP mode, put socket into non-blocking  in main()
395 			if (fcntl(sd, F_SETFL, sdflags | O_NONBLOCK) == -1)  in main()
404 				    servername, (nreq == argc - 1));  in main()
412 					    reqbuflen - reqbufpos, 0);  in main()
413 					if (len == -1)  in main()
431 			if (fcntl(sd, F_SETFL, sdflags) == -1)  in main()
435 		/* Do we need to blocking-send a request? */  in main()
439 				    reqbuflen - reqbufpos, 0);  in main()
440 				if (len == -1)  in main()
451 		contentlength = -1;  in main()
460 			eolp = strnstr(hln, "\r\n", resbuflen - resbufpos);  in main()
461 			resbufpos = (eolp - resbuf) + 2;  in main()
477 				 * requests is OK -- as long as we don't  in main()
479 				 * and we either have a Content-Length or  in main()
480 				 * Transfer-Encoding: chunked header to  in main()
496 					    *hln - '0';  in main()
509 			 * "Connection: Keep-Alive" header  in main()
515 				if (strcasestr(hln, "Keep-Alive") != NULL)  in main()
522 			/* Check for "Content-Length:" header */  in main()
523 			if (strncasecmp(hln, "Content-Length:", 15) == 0) {  in main()
538 					    *hln - '0';  in main()
546 			/* Check for "Transfer-Encoding: chunked" header */  in main()
547 			if (strncasecmp(hln, "Transfer-Encoding:", 18) == 0) {  in main()
598 			if (fd == -1)  in main()
604 			/* Handle a chunked-encoded entity */  in main()
614 				resbufpos = (eolp - resbuf) + 2;  in main()
623 						clen = clen * 16 + *hln - '0';  in main()
626 						    tolower(*hln) - 'a';  in main()
645 				resbufpos = (eolp - resbuf) + 2;  in main()
647 		} else if (contentlength != -1) {  in main()
660 			if (error == -1)  in main()
665 		if (fd != -1) {  in main()
667 			fd = -1;  in main()
694 		 * Something went wrong -- our connection died, the server  in main()
709 		sd = -1;  in main()
710 		if (fd != -1) {  in main()
712 			fd = -1;  in main()