Annotation of embedaddon/curl/lib/urlapi.c, revision 1.1
1.1 ! misho 1: /***************************************************************************
! 2: * _ _ ____ _
! 3: * Project ___| | | | _ \| |
! 4: * / __| | | | |_) | |
! 5: * | (__| |_| | _ <| |___
! 6: * \___|\___/|_| \_\_____|
! 7: *
! 8: * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
! 9: *
! 10: * This software is licensed as described in the file COPYING, which
! 11: * you should have received as part of this distribution. The terms
! 12: * are also available at https://curl.haxx.se/docs/copyright.html.
! 13: *
! 14: * You may opt to use, copy, modify, merge, publish, distribute and/or sell
! 15: * copies of the Software, and permit persons to whom the Software is
! 16: * furnished to do so, under the terms of the COPYING file.
! 17: *
! 18: * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
! 19: * KIND, either express or implied.
! 20: *
! 21: ***************************************************************************/
! 22:
! 23: #include "curl_setup.h"
! 24:
! 25: #include "urldata.h"
! 26: #include "urlapi-int.h"
! 27: #include "strcase.h"
! 28: #include "dotdot.h"
! 29: #include "url.h"
! 30: #include "escape.h"
! 31: #include "curl_ctype.h"
! 32: #include "inet_pton.h"
! 33:
! 34: /* The last 3 #include files should be in this order */
! 35: #include "curl_printf.h"
! 36: #include "curl_memory.h"
! 37: #include "memdebug.h"
! 38:
! 39: /* MSDOS/Windows style drive prefix, eg c: in c:foo */
! 40: #define STARTS_WITH_DRIVE_PREFIX(str) \
! 41: ((('a' <= str[0] && str[0] <= 'z') || \
! 42: ('A' <= str[0] && str[0] <= 'Z')) && \
! 43: (str[1] == ':'))
! 44:
! 45: /* MSDOS/Windows style drive prefix, optionally with
! 46: * a '|' instead of ':', followed by a slash or NUL */
! 47: #define STARTS_WITH_URL_DRIVE_PREFIX(str) \
! 48: ((('a' <= (str)[0] && (str)[0] <= 'z') || \
! 49: ('A' <= (str)[0] && (str)[0] <= 'Z')) && \
! 50: ((str)[1] == ':' || (str)[1] == '|') && \
! 51: ((str)[2] == '/' || (str)[2] == '\\' || (str)[2] == 0))
! 52:
! 53: /* Internal representation of CURLU. Point to URL-encoded strings. */
! 54: struct Curl_URL {
! 55: char *scheme;
! 56: char *user;
! 57: char *password;
! 58: char *options; /* IMAP only? */
! 59: char *host;
! 60: char *zoneid; /* for numerical IPv6 addresses */
! 61: char *port;
! 62: char *path;
! 63: char *query;
! 64: char *fragment;
! 65:
! 66: char *scratch; /* temporary scratch area */
! 67: char *temppath; /* temporary path pointer */
! 68: long portnum; /* the numerical version */
! 69: };
! 70:
! 71: #define DEFAULT_SCHEME "https"
! 72:
! 73: static void free_urlhandle(struct Curl_URL *u)
! 74: {
! 75: free(u->scheme);
! 76: free(u->user);
! 77: free(u->password);
! 78: free(u->options);
! 79: free(u->host);
! 80: free(u->zoneid);
! 81: free(u->port);
! 82: free(u->path);
! 83: free(u->query);
! 84: free(u->fragment);
! 85: free(u->scratch);
! 86: free(u->temppath);
! 87: }
! 88:
! 89: /* move the full contents of one handle onto another and
! 90: free the original */
! 91: static void mv_urlhandle(struct Curl_URL *from,
! 92: struct Curl_URL *to)
! 93: {
! 94: free_urlhandle(to);
! 95: *to = *from;
! 96: free(from);
! 97: }
! 98:
! 99: /*
! 100: * Find the separator at the end of the host name, or the '?' in cases like
! 101: * http://www.url.com?id=2380
! 102: */
! 103: static const char *find_host_sep(const char *url)
! 104: {
! 105: const char *sep;
! 106: const char *query;
! 107:
! 108: /* Find the start of the hostname */
! 109: sep = strstr(url, "//");
! 110: if(!sep)
! 111: sep = url;
! 112: else
! 113: sep += 2;
! 114:
! 115: query = strchr(sep, '?');
! 116: sep = strchr(sep, '/');
! 117:
! 118: if(!sep)
! 119: sep = url + strlen(url);
! 120:
! 121: if(!query)
! 122: query = url + strlen(url);
! 123:
! 124: return sep < query ? sep : query;
! 125: }
! 126:
! 127: /*
! 128: * Decide in an encoding-independent manner whether a character in an
! 129: * URL must be escaped. The same criterion must be used in strlen_url()
! 130: * and strcpy_url().
! 131: */
! 132: static bool urlchar_needs_escaping(int c)
! 133: {
! 134: return !(ISCNTRL(c) || ISSPACE(c) || ISGRAPH(c));
! 135: }
! 136:
! 137: /*
! 138: * strlen_url() returns the length of the given URL if the spaces within the
! 139: * URL were properly URL encoded.
! 140: * URL encoding should be skipped for host names, otherwise IDN resolution
! 141: * will fail.
! 142: */
! 143: static size_t strlen_url(const char *url, bool relative)
! 144: {
! 145: const unsigned char *ptr;
! 146: size_t newlen = 0;
! 147: bool left = TRUE; /* left side of the ? */
! 148: const unsigned char *host_sep = (const unsigned char *) url;
! 149:
! 150: if(!relative)
! 151: host_sep = (const unsigned char *) find_host_sep(url);
! 152:
! 153: for(ptr = (unsigned char *)url; *ptr; ptr++) {
! 154:
! 155: if(ptr < host_sep) {
! 156: ++newlen;
! 157: continue;
! 158: }
! 159:
! 160: switch(*ptr) {
! 161: case '?':
! 162: left = FALSE;
! 163: /* FALLTHROUGH */
! 164: default:
! 165: if(urlchar_needs_escaping(*ptr))
! 166: newlen += 2;
! 167: newlen++;
! 168: break;
! 169: case ' ':
! 170: if(left)
! 171: newlen += 3;
! 172: else
! 173: newlen++;
! 174: break;
! 175: }
! 176: }
! 177: return newlen;
! 178: }
! 179:
! 180: /* strcpy_url() copies a url to a output buffer and URL-encodes the spaces in
! 181: * the source URL accordingly.
! 182: * URL encoding should be skipped for host names, otherwise IDN resolution
! 183: * will fail.
! 184: */
! 185: static void strcpy_url(char *output, const char *url, bool relative)
! 186: {
! 187: /* we must add this with whitespace-replacing */
! 188: bool left = TRUE;
! 189: const unsigned char *iptr;
! 190: char *optr = output;
! 191: const unsigned char *host_sep = (const unsigned char *) url;
! 192:
! 193: if(!relative)
! 194: host_sep = (const unsigned char *) find_host_sep(url);
! 195:
! 196: for(iptr = (unsigned char *)url; /* read from here */
! 197: *iptr; /* until zero byte */
! 198: iptr++) {
! 199:
! 200: if(iptr < host_sep) {
! 201: *optr++ = *iptr;
! 202: continue;
! 203: }
! 204:
! 205: switch(*iptr) {
! 206: case '?':
! 207: left = FALSE;
! 208: /* FALLTHROUGH */
! 209: default:
! 210: if(urlchar_needs_escaping(*iptr)) {
! 211: msnprintf(optr, 4, "%%%02x", *iptr);
! 212: optr += 3;
! 213: }
! 214: else
! 215: *optr++=*iptr;
! 216: break;
! 217: case ' ':
! 218: if(left) {
! 219: *optr++='%'; /* add a '%' */
! 220: *optr++='2'; /* add a '2' */
! 221: *optr++='0'; /* add a '0' */
! 222: }
! 223: else
! 224: *optr++='+'; /* add a '+' here */
! 225: break;
! 226: }
! 227: }
! 228: *optr = 0; /* zero terminate output buffer */
! 229:
! 230: }
! 231:
! 232: /*
! 233: * Returns true if the given URL is absolute (as opposed to relative) within
! 234: * the buffer size. Returns the scheme in the buffer if TRUE and 'buf' is
! 235: * non-NULL.
! 236: */
! 237: bool Curl_is_absolute_url(const char *url, char *buf, size_t buflen)
! 238: {
! 239: size_t i;
! 240: #ifdef WIN32
! 241: if(STARTS_WITH_DRIVE_PREFIX(url))
! 242: return FALSE;
! 243: #endif
! 244: for(i = 0; i < buflen && url[i]; ++i) {
! 245: char s = url[i];
! 246: if((s == ':') && (url[i + 1] == '/')) {
! 247: if(buf)
! 248: buf[i] = 0;
! 249: return TRUE;
! 250: }
! 251: /* RFC 3986 3.1 explains:
! 252: scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
! 253: */
! 254: else if(ISALNUM(s) || (s == '+') || (s == '-') || (s == '.') ) {
! 255: if(buf)
! 256: buf[i] = (char)TOLOWER(s);
! 257: }
! 258: else
! 259: break;
! 260: }
! 261: return FALSE;
! 262: }
! 263:
! 264: /*
! 265: * Concatenate a relative URL to a base URL making it absolute.
! 266: * URL-encodes any spaces.
! 267: * The returned pointer must be freed by the caller unless NULL
! 268: * (returns NULL on out of memory).
! 269: */
! 270: static char *concat_url(const char *base, const char *relurl)
! 271: {
! 272: /***
! 273: TRY to append this new path to the old URL
! 274: to the right of the host part. Oh crap, this is doomed to cause
! 275: problems in the future...
! 276: */
! 277: char *newest;
! 278: char *protsep;
! 279: char *pathsep;
! 280: size_t newlen;
! 281: bool host_changed = FALSE;
! 282:
! 283: const char *useurl = relurl;
! 284: size_t urllen;
! 285:
! 286: /* we must make our own copy of the URL to play with, as it may
! 287: point to read-only data */
! 288: char *url_clone = strdup(base);
! 289:
! 290: if(!url_clone)
! 291: return NULL; /* skip out of this NOW */
! 292:
! 293: /* protsep points to the start of the host name */
! 294: protsep = strstr(url_clone, "//");
! 295: if(!protsep)
! 296: protsep = url_clone;
! 297: else
! 298: protsep += 2; /* pass the slashes */
! 299:
! 300: if('/' != relurl[0]) {
! 301: int level = 0;
! 302:
! 303: /* First we need to find out if there's a ?-letter in the URL,
! 304: and cut it and the right-side of that off */
! 305: pathsep = strchr(protsep, '?');
! 306: if(pathsep)
! 307: *pathsep = 0;
! 308:
! 309: /* we have a relative path to append to the last slash if there's one
! 310: available, or if the new URL is just a query string (starts with a
! 311: '?') we append the new one at the end of the entire currently worked
! 312: out URL */
! 313: if(useurl[0] != '?') {
! 314: pathsep = strrchr(protsep, '/');
! 315: if(pathsep)
! 316: *pathsep = 0;
! 317: }
! 318:
! 319: /* Check if there's any slash after the host name, and if so, remember
! 320: that position instead */
! 321: pathsep = strchr(protsep, '/');
! 322: if(pathsep)
! 323: protsep = pathsep + 1;
! 324: else
! 325: protsep = NULL;
! 326:
! 327: /* now deal with one "./" or any amount of "../" in the newurl
! 328: and act accordingly */
! 329:
! 330: if((useurl[0] == '.') && (useurl[1] == '/'))
! 331: useurl += 2; /* just skip the "./" */
! 332:
! 333: while((useurl[0] == '.') &&
! 334: (useurl[1] == '.') &&
! 335: (useurl[2] == '/')) {
! 336: level++;
! 337: useurl += 3; /* pass the "../" */
! 338: }
! 339:
! 340: if(protsep) {
! 341: while(level--) {
! 342: /* cut off one more level from the right of the original URL */
! 343: pathsep = strrchr(protsep, '/');
! 344: if(pathsep)
! 345: *pathsep = 0;
! 346: else {
! 347: *protsep = 0;
! 348: break;
! 349: }
! 350: }
! 351: }
! 352: }
! 353: else {
! 354: /* We got a new absolute path for this server */
! 355:
! 356: if(relurl[1] == '/') {
! 357: /* the new URL starts with //, just keep the protocol part from the
! 358: original one */
! 359: *protsep = 0;
! 360: useurl = &relurl[2]; /* we keep the slashes from the original, so we
! 361: skip the new ones */
! 362: host_changed = TRUE;
! 363: }
! 364: else {
! 365: /* cut off the original URL from the first slash, or deal with URLs
! 366: without slash */
! 367: pathsep = strchr(protsep, '/');
! 368: if(pathsep) {
! 369: /* When people use badly formatted URLs, such as
! 370: "http://www.url.com?dir=/home/daniel" we must not use the first
! 371: slash, if there's a ?-letter before it! */
! 372: char *sep = strchr(protsep, '?');
! 373: if(sep && (sep < pathsep))
! 374: pathsep = sep;
! 375: *pathsep = 0;
! 376: }
! 377: else {
! 378: /* There was no slash. Now, since we might be operating on a badly
! 379: formatted URL, such as "http://www.url.com?id=2380" which doesn't
! 380: use a slash separator as it is supposed to, we need to check for a
! 381: ?-letter as well! */
! 382: pathsep = strchr(protsep, '?');
! 383: if(pathsep)
! 384: *pathsep = 0;
! 385: }
! 386: }
! 387: }
! 388:
! 389: /* If the new part contains a space, this is a mighty stupid redirect
! 390: but we still make an effort to do "right". To the left of a '?'
! 391: letter we replace each space with %20 while it is replaced with '+'
! 392: on the right side of the '?' letter.
! 393: */
! 394: newlen = strlen_url(useurl, !host_changed);
! 395:
! 396: urllen = strlen(url_clone);
! 397:
! 398: newest = malloc(urllen + 1 + /* possible slash */
! 399: newlen + 1 /* zero byte */);
! 400:
! 401: if(!newest) {
! 402: free(url_clone); /* don't leak this */
! 403: return NULL;
! 404: }
! 405:
! 406: /* copy over the root url part */
! 407: memcpy(newest, url_clone, urllen);
! 408:
! 409: /* check if we need to append a slash */
! 410: if(('/' == useurl[0]) || (protsep && !*protsep) || ('?' == useurl[0]))
! 411: ;
! 412: else
! 413: newest[urllen++]='/';
! 414:
! 415: /* then append the new piece on the right side */
! 416: strcpy_url(&newest[urllen], useurl, !host_changed);
! 417:
! 418: free(url_clone);
! 419:
! 420: return newest;
! 421: }
! 422:
! 423: /*
! 424: * parse_hostname_login()
! 425: *
! 426: * Parse the login details (user name, password and options) from the URL and
! 427: * strip them out of the host name
! 428: *
! 429: */
! 430: static CURLUcode parse_hostname_login(struct Curl_URL *u,
! 431: char **hostname,
! 432: unsigned int flags)
! 433: {
! 434: CURLUcode result = CURLUE_OK;
! 435: CURLcode ccode;
! 436: char *userp = NULL;
! 437: char *passwdp = NULL;
! 438: char *optionsp = NULL;
! 439: const struct Curl_handler *h = NULL;
! 440:
! 441: /* At this point, we're hoping all the other special cases have
! 442: * been taken care of, so conn->host.name is at most
! 443: * [user[:password][;options]]@]hostname
! 444: *
! 445: * We need somewhere to put the embedded details, so do that first.
! 446: */
! 447:
! 448: char *ptr = strchr(*hostname, '@');
! 449: char *login = *hostname;
! 450:
! 451: if(!ptr)
! 452: goto out;
! 453:
! 454: /* We will now try to extract the
! 455: * possible login information in a string like:
! 456: * ftp://user:password@ftp.my.site:8021/README */
! 457: *hostname = ++ptr;
! 458:
! 459: /* if this is a known scheme, get some details */
! 460: if(u->scheme)
! 461: h = Curl_builtin_scheme(u->scheme);
! 462:
! 463: /* We could use the login information in the URL so extract it. Only parse
! 464: options if the handler says we should. Note that 'h' might be NULL! */
! 465: ccode = Curl_parse_login_details(login, ptr - login - 1,
! 466: &userp, &passwdp,
! 467: (h && (h->flags & PROTOPT_URLOPTIONS)) ?
! 468: &optionsp:NULL);
! 469: if(ccode) {
! 470: result = CURLUE_MALFORMED_INPUT;
! 471: goto out;
! 472: }
! 473:
! 474: if(userp) {
! 475: if(flags & CURLU_DISALLOW_USER) {
! 476: /* Option DISALLOW_USER is set and url contains username. */
! 477: result = CURLUE_USER_NOT_ALLOWED;
! 478: goto out;
! 479: }
! 480:
! 481: u->user = userp;
! 482: }
! 483:
! 484: if(passwdp)
! 485: u->password = passwdp;
! 486:
! 487: if(optionsp)
! 488: u->options = optionsp;
! 489:
! 490: return CURLUE_OK;
! 491: out:
! 492:
! 493: free(userp);
! 494: free(passwdp);
! 495: free(optionsp);
! 496:
! 497: return result;
! 498: }
! 499:
! 500: UNITTEST CURLUcode Curl_parse_port(struct Curl_URL *u, char *hostname)
! 501: {
! 502: char *portptr = NULL;
! 503: char endbracket;
! 504: int len;
! 505:
! 506: /*
! 507: * Find the end of an IPv6 address, either on the ']' ending bracket or
! 508: * a percent-encoded zone index.
! 509: */
! 510: if(1 == sscanf(hostname, "[%*45[0123456789abcdefABCDEF:.]%c%n",
! 511: &endbracket, &len)) {
! 512: if(']' == endbracket)
! 513: portptr = &hostname[len];
! 514: else if('%' == endbracket) {
! 515: int zonelen = len;
! 516: if(1 == sscanf(hostname + zonelen, "%*[^]]%c%n", &endbracket, &len)) {
! 517: if(']' != endbracket)
! 518: return CURLUE_MALFORMED_INPUT;
! 519: portptr = &hostname[--zonelen + len + 1];
! 520: }
! 521: else
! 522: return CURLUE_MALFORMED_INPUT;
! 523: }
! 524: else
! 525: return CURLUE_MALFORMED_INPUT;
! 526:
! 527: /* this is a RFC2732-style specified IP-address */
! 528: if(portptr && *portptr) {
! 529: if(*portptr != ':')
! 530: return CURLUE_MALFORMED_INPUT;
! 531: }
! 532: else
! 533: portptr = NULL;
! 534: }
! 535: else
! 536: portptr = strchr(hostname, ':');
! 537:
! 538: if(portptr) {
! 539: char *rest;
! 540: long port;
! 541: char portbuf[7];
! 542:
! 543: /* Browser behavior adaptation. If there's a colon with no digits after,
! 544: just cut off the name there which makes us ignore the colon and just
! 545: use the default port. Firefox, Chrome and Safari all do that. */
! 546: if(!portptr[1]) {
! 547: *portptr = '\0';
! 548: return CURLUE_OK;
! 549: }
! 550:
! 551: if(!ISDIGIT(portptr[1]))
! 552: return CURLUE_BAD_PORT_NUMBER;
! 553:
! 554: port = strtol(portptr + 1, &rest, 10); /* Port number must be decimal */
! 555:
! 556: if((port <= 0) || (port > 0xffff))
! 557: /* Single unix standard says port numbers are 16 bits long, but we don't
! 558: treat port zero as OK. */
! 559: return CURLUE_BAD_PORT_NUMBER;
! 560:
! 561: if(rest[0])
! 562: return CURLUE_BAD_PORT_NUMBER;
! 563:
! 564: *portptr++ = '\0'; /* cut off the name there */
! 565: *rest = 0;
! 566: /* generate a new port number string to get rid of leading zeroes etc */
! 567: msnprintf(portbuf, sizeof(portbuf), "%ld", port);
! 568: u->portnum = port;
! 569: u->port = strdup(portbuf);
! 570: if(!u->port)
! 571: return CURLUE_OUT_OF_MEMORY;
! 572: }
! 573:
! 574: return CURLUE_OK;
! 575: }
! 576:
! 577: /* scan for byte values < 31 or 127 */
! 578: static CURLUcode junkscan(const char *part)
! 579: {
! 580: if(part) {
! 581: static const char badbytes[]={
! 582: /* */ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
! 583: 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
! 584: 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
! 585: 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
! 586: 0x7f,
! 587: 0x00 /* zero terminate */
! 588: };
! 589: size_t n = strlen(part);
! 590: size_t nfine = strcspn(part, badbytes);
! 591: if(nfine != n)
! 592: /* since we don't know which part is scanned, return a generic error
! 593: code */
! 594: return CURLUE_MALFORMED_INPUT;
! 595: }
! 596: return CURLUE_OK;
! 597: }
! 598:
! 599: static CURLUcode hostname_check(struct Curl_URL *u, char *hostname)
! 600: {
! 601: size_t len;
! 602: size_t hlen = strlen(hostname);
! 603:
! 604: if(hostname[0] == '[') {
! 605: #ifdef ENABLE_IPV6
! 606: char dest[16]; /* fits a binary IPv6 address */
! 607: #endif
! 608: const char *l = "0123456789abcdefABCDEF:.";
! 609: if(hlen < 5) /* '[::1]' is the shortest possible valid string */
! 610: return CURLUE_MALFORMED_INPUT;
! 611: hostname++;
! 612: hlen -= 2;
! 613:
! 614: if(hostname[hlen] != ']')
! 615: return CURLUE_MALFORMED_INPUT;
! 616:
! 617: /* only valid letters are ok */
! 618: len = strspn(hostname, l);
! 619: if(hlen != len) {
! 620: hlen = len;
! 621: if(hostname[len] == '%') {
! 622: /* this could now be '%[zone id]' */
! 623: char zoneid[16];
! 624: int i = 0;
! 625: char *h = &hostname[len + 1];
! 626: /* pass '25' if present and is a url encoded percent sign */
! 627: if(!strncmp(h, "25", 2) && h[2] && (h[2] != ']'))
! 628: h += 2;
! 629: while(*h && (*h != ']') && (i < 15))
! 630: zoneid[i++] = *h++;
! 631: if(!i || (']' != *h))
! 632: return CURLUE_MALFORMED_INPUT;
! 633: zoneid[i] = 0;
! 634: u->zoneid = strdup(zoneid);
! 635: if(!u->zoneid)
! 636: return CURLUE_OUT_OF_MEMORY;
! 637: hostname[len] = ']'; /* insert end bracket */
! 638: hostname[len + 1] = 0; /* terminate the hostname */
! 639: }
! 640: else
! 641: return CURLUE_MALFORMED_INPUT;
! 642: /* hostname is fine */
! 643: }
! 644: #ifdef ENABLE_IPV6
! 645: hostname[hlen] = 0; /* end the address there */
! 646: if(1 != Curl_inet_pton(AF_INET6, hostname, dest))
! 647: return CURLUE_MALFORMED_INPUT;
! 648: hostname[hlen] = ']'; /* restore ending bracket */
! 649: #endif
! 650: }
! 651: else {
! 652: /* letters from the second string is not ok */
! 653: len = strcspn(hostname, " ");
! 654: if(hlen != len)
! 655: /* hostname with bad content */
! 656: return CURLUE_MALFORMED_INPUT;
! 657: }
! 658: if(!hostname[0])
! 659: return CURLUE_NO_HOST;
! 660: return CURLUE_OK;
! 661: }
! 662:
! 663: #define HOSTNAME_END(x) (((x) == '/') || ((x) == '?') || ((x) == '#'))
! 664:
! 665: static CURLUcode seturl(const char *url, CURLU *u, unsigned int flags)
! 666: {
! 667: char *path;
! 668: bool path_alloced = FALSE;
! 669: char *hostname;
! 670: char *query = NULL;
! 671: char *fragment = NULL;
! 672: CURLUcode result;
! 673: bool url_has_scheme = FALSE;
! 674: char schemebuf[MAX_SCHEME_LEN + 1];
! 675: const char *schemep = NULL;
! 676: size_t schemelen = 0;
! 677: size_t urllen;
! 678:
! 679: if(!url)
! 680: return CURLUE_MALFORMED_INPUT;
! 681:
! 682: /*************************************************************
! 683: * Parse the URL.
! 684: ************************************************************/
! 685: /* allocate scratch area */
! 686: urllen = strlen(url);
! 687: if(urllen > CURL_MAX_INPUT_LENGTH)
! 688: /* excessive input length */
! 689: return CURLUE_MALFORMED_INPUT;
! 690:
! 691: path = u->scratch = malloc(urllen * 2 + 2);
! 692: if(!path)
! 693: return CURLUE_OUT_OF_MEMORY;
! 694:
! 695: hostname = &path[urllen + 1];
! 696: hostname[0] = 0;
! 697:
! 698: if(Curl_is_absolute_url(url, schemebuf, sizeof(schemebuf))) {
! 699: url_has_scheme = TRUE;
! 700: schemelen = strlen(schemebuf);
! 701: }
! 702:
! 703: /* handle the file: scheme */
! 704: if(url_has_scheme && strcasecompare(schemebuf, "file")) {
! 705: /* path has been allocated large enough to hold this */
! 706: strcpy(path, &url[5]);
! 707:
! 708: hostname = NULL; /* no host for file: URLs */
! 709: u->scheme = strdup("file");
! 710: if(!u->scheme)
! 711: return CURLUE_OUT_OF_MEMORY;
! 712:
! 713: /* Extra handling URLs with an authority component (i.e. that start with
! 714: * "file://")
! 715: *
! 716: * We allow omitted hostname (e.g. file:/<path>) -- valid according to
! 717: * RFC 8089, but not the (current) WHAT-WG URL spec.
! 718: */
! 719: if(path[0] == '/' && path[1] == '/') {
! 720: /* swallow the two slashes */
! 721: char *ptr = &path[2];
! 722:
! 723: /*
! 724: * According to RFC 8089, a file: URL can be reliably dereferenced if:
! 725: *
! 726: * o it has no/blank hostname, or
! 727: *
! 728: * o the hostname matches "localhost" (case-insensitively), or
! 729: *
! 730: * o the hostname is a FQDN that resolves to this machine.
! 731: *
! 732: * For brevity, we only consider URLs with empty, "localhost", or
! 733: * "127.0.0.1" hostnames as local.
! 734: *
! 735: * Additionally, there is an exception for URLs with a Windows drive
! 736: * letter in the authority (which was accidentally omitted from RFC 8089
! 737: * Appendix E, but believe me, it was meant to be there. --MK)
! 738: */
! 739: if(ptr[0] != '/' && !STARTS_WITH_URL_DRIVE_PREFIX(ptr)) {
! 740: /* the URL includes a host name, it must match "localhost" or
! 741: "127.0.0.1" to be valid */
! 742: if(!checkprefix("localhost/", ptr) &&
! 743: !checkprefix("127.0.0.1/", ptr)) {
! 744: /* Invalid file://hostname/, expected localhost or 127.0.0.1 or
! 745: none */
! 746: return CURLUE_MALFORMED_INPUT;
! 747: }
! 748: ptr += 9; /* now points to the slash after the host */
! 749: }
! 750:
! 751: path = ptr;
! 752: }
! 753:
! 754: #if !defined(MSDOS) && !defined(WIN32) && !defined(__CYGWIN__)
! 755: /* Don't allow Windows drive letters when not in Windows.
! 756: * This catches both "file:/c:" and "file:c:" */
! 757: if(('/' == path[0] && STARTS_WITH_URL_DRIVE_PREFIX(&path[1])) ||
! 758: STARTS_WITH_URL_DRIVE_PREFIX(path)) {
! 759: /* File drive letters are only accepted in MSDOS/Windows */
! 760: return CURLUE_MALFORMED_INPUT;
! 761: }
! 762: #else
! 763: /* If the path starts with a slash and a drive letter, ditch the slash */
! 764: if('/' == path[0] && STARTS_WITH_URL_DRIVE_PREFIX(&path[1])) {
! 765: /* This cannot be done with strcpy, as the memory chunks overlap! */
! 766: memmove(path, &path[1], strlen(&path[1]) + 1);
! 767: }
! 768: #endif
! 769:
! 770: }
! 771: else {
! 772: /* clear path */
! 773: const char *p;
! 774: const char *hostp;
! 775: size_t len;
! 776: path[0] = 0;
! 777:
! 778: if(url_has_scheme) {
! 779: int i = 0;
! 780: p = &url[schemelen + 1];
! 781: while(p && (*p == '/') && (i < 4)) {
! 782: p++;
! 783: i++;
! 784: }
! 785: if((i < 1) || (i>3))
! 786: /* less than one or more than three slashes */
! 787: return CURLUE_MALFORMED_INPUT;
! 788:
! 789: schemep = schemebuf;
! 790: if(!Curl_builtin_scheme(schemep) &&
! 791: !(flags & CURLU_NON_SUPPORT_SCHEME))
! 792: return CURLUE_UNSUPPORTED_SCHEME;
! 793:
! 794: if(junkscan(schemep))
! 795: return CURLUE_MALFORMED_INPUT;
! 796:
! 797: }
! 798: else {
! 799: /* no scheme! */
! 800:
! 801: if(!(flags & (CURLU_DEFAULT_SCHEME|CURLU_GUESS_SCHEME)))
! 802: return CURLUE_MALFORMED_INPUT;
! 803: if(flags & CURLU_DEFAULT_SCHEME)
! 804: schemep = DEFAULT_SCHEME;
! 805:
! 806: /*
! 807: * The URL was badly formatted, let's try without scheme specified.
! 808: */
! 809: p = url;
! 810: }
! 811: hostp = p; /* host name starts here */
! 812:
! 813: while(*p && !HOSTNAME_END(*p)) /* find end of host name */
! 814: p++;
! 815:
! 816: len = p - hostp;
! 817: if(len) {
! 818: memcpy(hostname, hostp, len);
! 819: hostname[len] = 0;
! 820: }
! 821: else {
! 822: if(!(flags & CURLU_NO_AUTHORITY))
! 823: return CURLUE_MALFORMED_INPUT;
! 824: }
! 825:
! 826: len = strlen(p);
! 827: memcpy(path, p, len);
! 828: path[len] = 0;
! 829:
! 830: if(schemep) {
! 831: u->scheme = strdup(schemep);
! 832: if(!u->scheme)
! 833: return CURLUE_OUT_OF_MEMORY;
! 834: }
! 835: }
! 836:
! 837: if(junkscan(path))
! 838: return CURLUE_MALFORMED_INPUT;
! 839:
! 840: if((flags & CURLU_URLENCODE) && path[0]) {
! 841: /* worst case output length is 3x the original! */
! 842: char *newp = malloc(strlen(path) * 3);
! 843: if(!newp)
! 844: return CURLUE_OUT_OF_MEMORY;
! 845: path_alloced = TRUE;
! 846: strcpy_url(newp, path, TRUE); /* consider it relative */
! 847: u->temppath = path = newp;
! 848: }
! 849:
! 850: fragment = strchr(path, '#');
! 851: if(fragment) {
! 852: *fragment++ = 0;
! 853: if(fragment[0]) {
! 854: u->fragment = strdup(fragment);
! 855: if(!u->fragment)
! 856: return CURLUE_OUT_OF_MEMORY;
! 857: }
! 858: }
! 859:
! 860: query = strchr(path, '?');
! 861: if(query) {
! 862: *query++ = 0;
! 863: /* done even if the query part is a blank string */
! 864: u->query = strdup(query);
! 865: if(!u->query)
! 866: return CURLUE_OUT_OF_MEMORY;
! 867: }
! 868:
! 869: if(!path[0])
! 870: /* if there's no path left set, unset */
! 871: path = NULL;
! 872: else {
! 873: if(!(flags & CURLU_PATH_AS_IS)) {
! 874: /* remove ../ and ./ sequences according to RFC3986 */
! 875: char *newp = Curl_dedotdotify(path);
! 876: if(!newp)
! 877: return CURLUE_OUT_OF_MEMORY;
! 878:
! 879: if(strcmp(newp, path)) {
! 880: /* if we got a new version */
! 881: if(path_alloced)
! 882: Curl_safefree(u->temppath);
! 883: u->temppath = path = newp;
! 884: path_alloced = TRUE;
! 885: }
! 886: else
! 887: free(newp);
! 888: }
! 889:
! 890: u->path = path_alloced?path:strdup(path);
! 891: if(!u->path)
! 892: return CURLUE_OUT_OF_MEMORY;
! 893: u->temppath = NULL; /* used now */
! 894: }
! 895:
! 896: if(hostname) {
! 897: /*
! 898: * Parse the login details and strip them out of the host name.
! 899: */
! 900: if(junkscan(hostname))
! 901: return CURLUE_MALFORMED_INPUT;
! 902:
! 903: result = parse_hostname_login(u, &hostname, flags);
! 904: if(result)
! 905: return result;
! 906:
! 907: result = Curl_parse_port(u, hostname);
! 908: if(result)
! 909: return result;
! 910:
! 911: if(0 == strlen(hostname) && (flags & CURLU_NO_AUTHORITY)) {
! 912: /* Skip hostname check, it's allowed to be empty. */
! 913: }
! 914: else {
! 915: result = hostname_check(u, hostname);
! 916: if(result)
! 917: return result;
! 918: }
! 919:
! 920: u->host = strdup(hostname);
! 921: if(!u->host)
! 922: return CURLUE_OUT_OF_MEMORY;
! 923:
! 924: if((flags & CURLU_GUESS_SCHEME) && !schemep) {
! 925: /* legacy curl-style guess based on host name */
! 926: if(checkprefix("ftp.", hostname))
! 927: schemep = "ftp";
! 928: else if(checkprefix("dict.", hostname))
! 929: schemep = "dict";
! 930: else if(checkprefix("ldap.", hostname))
! 931: schemep = "ldap";
! 932: else if(checkprefix("imap.", hostname))
! 933: schemep = "imap";
! 934: else if(checkprefix("smtp.", hostname))
! 935: schemep = "smtp";
! 936: else if(checkprefix("pop3.", hostname))
! 937: schemep = "pop3";
! 938: else
! 939: schemep = "http";
! 940:
! 941: u->scheme = strdup(schemep);
! 942: if(!u->scheme)
! 943: return CURLUE_OUT_OF_MEMORY;
! 944: }
! 945: }
! 946:
! 947: Curl_safefree(u->scratch);
! 948: Curl_safefree(u->temppath);
! 949:
! 950: return CURLUE_OK;
! 951: }
! 952:
! 953: /*
! 954: * Parse the URL and set the relevant members of the Curl_URL struct.
! 955: */
! 956: static CURLUcode parseurl(const char *url, CURLU *u, unsigned int flags)
! 957: {
! 958: CURLUcode result = seturl(url, u, flags);
! 959: if(result) {
! 960: free_urlhandle(u);
! 961: memset(u, 0, sizeof(struct Curl_URL));
! 962: }
! 963: return result;
! 964: }
! 965:
! 966: /*
! 967: */
! 968: CURLU *curl_url(void)
! 969: {
! 970: return calloc(sizeof(struct Curl_URL), 1);
! 971: }
! 972:
! 973: void curl_url_cleanup(CURLU *u)
! 974: {
! 975: if(u) {
! 976: free_urlhandle(u);
! 977: free(u);
! 978: }
! 979: }
! 980:
! 981: #define DUP(dest, src, name) \
! 982: if(src->name) { \
! 983: dest->name = strdup(src->name); \
! 984: if(!dest->name) \
! 985: goto fail; \
! 986: }
! 987:
! 988: CURLU *curl_url_dup(CURLU *in)
! 989: {
! 990: struct Curl_URL *u = calloc(sizeof(struct Curl_URL), 1);
! 991: if(u) {
! 992: DUP(u, in, scheme);
! 993: DUP(u, in, user);
! 994: DUP(u, in, password);
! 995: DUP(u, in, options);
! 996: DUP(u, in, host);
! 997: DUP(u, in, port);
! 998: DUP(u, in, path);
! 999: DUP(u, in, query);
! 1000: DUP(u, in, fragment);
! 1001: u->portnum = in->portnum;
! 1002: }
! 1003: return u;
! 1004: fail:
! 1005: curl_url_cleanup(u);
! 1006: return NULL;
! 1007: }
! 1008:
! 1009: CURLUcode curl_url_get(CURLU *u, CURLUPart what,
! 1010: char **part, unsigned int flags)
! 1011: {
! 1012: char *ptr;
! 1013: CURLUcode ifmissing = CURLUE_UNKNOWN_PART;
! 1014: char portbuf[7];
! 1015: bool urldecode = (flags & CURLU_URLDECODE)?1:0;
! 1016: bool plusdecode = FALSE;
! 1017: (void)flags;
! 1018: if(!u)
! 1019: return CURLUE_BAD_HANDLE;
! 1020: if(!part)
! 1021: return CURLUE_BAD_PARTPOINTER;
! 1022: *part = NULL;
! 1023:
! 1024: switch(what) {
! 1025: case CURLUPART_SCHEME:
! 1026: ptr = u->scheme;
! 1027: ifmissing = CURLUE_NO_SCHEME;
! 1028: urldecode = FALSE; /* never for schemes */
! 1029: break;
! 1030: case CURLUPART_USER:
! 1031: ptr = u->user;
! 1032: ifmissing = CURLUE_NO_USER;
! 1033: break;
! 1034: case CURLUPART_PASSWORD:
! 1035: ptr = u->password;
! 1036: ifmissing = CURLUE_NO_PASSWORD;
! 1037: break;
! 1038: case CURLUPART_OPTIONS:
! 1039: ptr = u->options;
! 1040: ifmissing = CURLUE_NO_OPTIONS;
! 1041: break;
! 1042: case CURLUPART_HOST:
! 1043: ptr = u->host;
! 1044: ifmissing = CURLUE_NO_HOST;
! 1045: break;
! 1046: case CURLUPART_ZONEID:
! 1047: ptr = u->zoneid;
! 1048: break;
! 1049: case CURLUPART_PORT:
! 1050: ptr = u->port;
! 1051: ifmissing = CURLUE_NO_PORT;
! 1052: urldecode = FALSE; /* never for port */
! 1053: if(!ptr && (flags & CURLU_DEFAULT_PORT) && u->scheme) {
! 1054: /* there's no stored port number, but asked to deliver
! 1055: a default one for the scheme */
! 1056: const struct Curl_handler *h =
! 1057: Curl_builtin_scheme(u->scheme);
! 1058: if(h) {
! 1059: msnprintf(portbuf, sizeof(portbuf), "%ld", h->defport);
! 1060: ptr = portbuf;
! 1061: }
! 1062: }
! 1063: else if(ptr && u->scheme) {
! 1064: /* there is a stored port number, but ask to inhibit if
! 1065: it matches the default one for the scheme */
! 1066: const struct Curl_handler *h =
! 1067: Curl_builtin_scheme(u->scheme);
! 1068: if(h && (h->defport == u->portnum) &&
! 1069: (flags & CURLU_NO_DEFAULT_PORT))
! 1070: ptr = NULL;
! 1071: }
! 1072: break;
! 1073: case CURLUPART_PATH:
! 1074: ptr = u->path;
! 1075: if(!ptr) {
! 1076: ptr = u->path = strdup("/");
! 1077: if(!u->path)
! 1078: return CURLUE_OUT_OF_MEMORY;
! 1079: }
! 1080: break;
! 1081: case CURLUPART_QUERY:
! 1082: ptr = u->query;
! 1083: ifmissing = CURLUE_NO_QUERY;
! 1084: plusdecode = urldecode;
! 1085: break;
! 1086: case CURLUPART_FRAGMENT:
! 1087: ptr = u->fragment;
! 1088: ifmissing = CURLUE_NO_FRAGMENT;
! 1089: break;
! 1090: case CURLUPART_URL: {
! 1091: char *url;
! 1092: char *scheme;
! 1093: char *options = u->options;
! 1094: char *port = u->port;
! 1095: char *allochost = NULL;
! 1096: if(u->scheme && strcasecompare("file", u->scheme)) {
! 1097: url = aprintf("file://%s%s%s",
! 1098: u->path,
! 1099: u->fragment? "#": "",
! 1100: u->fragment? u->fragment : "");
! 1101: }
! 1102: else if(!u->host)
! 1103: return CURLUE_NO_HOST;
! 1104: else {
! 1105: const struct Curl_handler *h = NULL;
! 1106: if(u->scheme)
! 1107: scheme = u->scheme;
! 1108: else if(flags & CURLU_DEFAULT_SCHEME)
! 1109: scheme = (char *) DEFAULT_SCHEME;
! 1110: else
! 1111: return CURLUE_NO_SCHEME;
! 1112:
! 1113: h = Curl_builtin_scheme(scheme);
! 1114: if(!port && (flags & CURLU_DEFAULT_PORT)) {
! 1115: /* there's no stored port number, but asked to deliver
! 1116: a default one for the scheme */
! 1117: if(h) {
! 1118: msnprintf(portbuf, sizeof(portbuf), "%ld", h->defport);
! 1119: port = portbuf;
! 1120: }
! 1121: }
! 1122: else if(port) {
! 1123: /* there is a stored port number, but asked to inhibit if it matches
! 1124: the default one for the scheme */
! 1125: if(h && (h->defport == u->portnum) &&
! 1126: (flags & CURLU_NO_DEFAULT_PORT))
! 1127: port = NULL;
! 1128: }
! 1129:
! 1130: if(h && !(h->flags & PROTOPT_URLOPTIONS))
! 1131: options = NULL;
! 1132:
! 1133: if((u->host[0] == '[') && u->zoneid) {
! 1134: /* make it '[ host %25 zoneid ]' */
! 1135: size_t hostlen = strlen(u->host);
! 1136: size_t alen = hostlen + 3 + strlen(u->zoneid) + 1;
! 1137: allochost = malloc(alen);
! 1138: if(!allochost)
! 1139: return CURLUE_OUT_OF_MEMORY;
! 1140: memcpy(allochost, u->host, hostlen - 1);
! 1141: msnprintf(&allochost[hostlen - 1], alen - hostlen + 1,
! 1142: "%%25%s]", u->zoneid);
! 1143: }
! 1144:
! 1145: url = aprintf("%s://%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
! 1146: scheme,
! 1147: u->user ? u->user : "",
! 1148: u->password ? ":": "",
! 1149: u->password ? u->password : "",
! 1150: options ? ";" : "",
! 1151: options ? options : "",
! 1152: (u->user || u->password || options) ? "@": "",
! 1153: allochost ? allochost : u->host,
! 1154: port ? ":": "",
! 1155: port ? port : "",
! 1156: (u->path && (u->path[0] != '/')) ? "/": "",
! 1157: u->path ? u->path : "/",
! 1158: (u->query && u->query[0]) ? "?": "",
! 1159: (u->query && u->query[0]) ? u->query : "",
! 1160: u->fragment? "#": "",
! 1161: u->fragment? u->fragment : "");
! 1162: free(allochost);
! 1163: }
! 1164: if(!url)
! 1165: return CURLUE_OUT_OF_MEMORY;
! 1166: *part = url;
! 1167: return CURLUE_OK;
! 1168: }
! 1169: default:
! 1170: ptr = NULL;
! 1171: break;
! 1172: }
! 1173: if(ptr) {
! 1174: *part = strdup(ptr);
! 1175: if(!*part)
! 1176: return CURLUE_OUT_OF_MEMORY;
! 1177: if(plusdecode) {
! 1178: /* convert + to space */
! 1179: char *plus;
! 1180: for(plus = *part; *plus; ++plus) {
! 1181: if(*plus == '+')
! 1182: *plus = ' ';
! 1183: }
! 1184: }
! 1185: if(urldecode) {
! 1186: char *decoded;
! 1187: size_t dlen;
! 1188: CURLcode res = Curl_urldecode(NULL, *part, 0, &decoded, &dlen, TRUE);
! 1189: free(*part);
! 1190: if(res) {
! 1191: *part = NULL;
! 1192: return CURLUE_URLDECODE;
! 1193: }
! 1194: *part = decoded;
! 1195: }
! 1196: return CURLUE_OK;
! 1197: }
! 1198: else
! 1199: return ifmissing;
! 1200: }
! 1201:
! 1202: CURLUcode curl_url_set(CURLU *u, CURLUPart what,
! 1203: const char *part, unsigned int flags)
! 1204: {
! 1205: char **storep = NULL;
! 1206: long port = 0;
! 1207: bool urlencode = (flags & CURLU_URLENCODE)? 1 : 0;
! 1208: bool plusencode = FALSE;
! 1209: bool urlskipslash = FALSE;
! 1210: bool appendquery = FALSE;
! 1211: bool equalsencode = FALSE;
! 1212:
! 1213: if(!u)
! 1214: return CURLUE_BAD_HANDLE;
! 1215: if(!part) {
! 1216: /* setting a part to NULL clears it */
! 1217: switch(what) {
! 1218: case CURLUPART_URL:
! 1219: break;
! 1220: case CURLUPART_SCHEME:
! 1221: storep = &u->scheme;
! 1222: break;
! 1223: case CURLUPART_USER:
! 1224: storep = &u->user;
! 1225: break;
! 1226: case CURLUPART_PASSWORD:
! 1227: storep = &u->password;
! 1228: break;
! 1229: case CURLUPART_OPTIONS:
! 1230: storep = &u->options;
! 1231: break;
! 1232: case CURLUPART_HOST:
! 1233: storep = &u->host;
! 1234: break;
! 1235: case CURLUPART_ZONEID:
! 1236: storep = &u->zoneid;
! 1237: break;
! 1238: case CURLUPART_PORT:
! 1239: u->portnum = 0;
! 1240: storep = &u->port;
! 1241: break;
! 1242: case CURLUPART_PATH:
! 1243: storep = &u->path;
! 1244: break;
! 1245: case CURLUPART_QUERY:
! 1246: storep = &u->query;
! 1247: break;
! 1248: case CURLUPART_FRAGMENT:
! 1249: storep = &u->fragment;
! 1250: break;
! 1251: default:
! 1252: return CURLUE_UNKNOWN_PART;
! 1253: }
! 1254: if(storep && *storep) {
! 1255: free(*storep);
! 1256: *storep = NULL;
! 1257: }
! 1258: return CURLUE_OK;
! 1259: }
! 1260:
! 1261: switch(what) {
! 1262: case CURLUPART_SCHEME:
! 1263: if(strlen(part) > MAX_SCHEME_LEN)
! 1264: /* too long */
! 1265: return CURLUE_MALFORMED_INPUT;
! 1266: if(!(flags & CURLU_NON_SUPPORT_SCHEME) &&
! 1267: /* verify that it is a fine scheme */
! 1268: !Curl_builtin_scheme(part))
! 1269: return CURLUE_UNSUPPORTED_SCHEME;
! 1270: storep = &u->scheme;
! 1271: urlencode = FALSE; /* never */
! 1272: break;
! 1273: case CURLUPART_USER:
! 1274: storep = &u->user;
! 1275: break;
! 1276: case CURLUPART_PASSWORD:
! 1277: storep = &u->password;
! 1278: break;
! 1279: case CURLUPART_OPTIONS:
! 1280: storep = &u->options;
! 1281: break;
! 1282: case CURLUPART_HOST:
! 1283: storep = &u->host;
! 1284: free(u->zoneid);
! 1285: u->zoneid = NULL;
! 1286: break;
! 1287: case CURLUPART_ZONEID:
! 1288: storep = &u->zoneid;
! 1289: break;
! 1290: case CURLUPART_PORT:
! 1291: {
! 1292: char *endp;
! 1293: urlencode = FALSE; /* never */
! 1294: port = strtol(part, &endp, 10); /* Port number must be decimal */
! 1295: if((port <= 0) || (port > 0xffff))
! 1296: return CURLUE_BAD_PORT_NUMBER;
! 1297: if(*endp)
! 1298: /* weirdly provided number, not good! */
! 1299: return CURLUE_MALFORMED_INPUT;
! 1300: storep = &u->port;
! 1301: }
! 1302: break;
! 1303: case CURLUPART_PATH:
! 1304: urlskipslash = TRUE;
! 1305: storep = &u->path;
! 1306: break;
! 1307: case CURLUPART_QUERY:
! 1308: plusencode = urlencode;
! 1309: appendquery = (flags & CURLU_APPENDQUERY)?1:0;
! 1310: equalsencode = appendquery;
! 1311: storep = &u->query;
! 1312: break;
! 1313: case CURLUPART_FRAGMENT:
! 1314: storep = &u->fragment;
! 1315: break;
! 1316: case CURLUPART_URL: {
! 1317: /*
! 1318: * Allow a new URL to replace the existing (if any) contents.
! 1319: *
! 1320: * If the existing contents is enough for a URL, allow a relative URL to
! 1321: * replace it.
! 1322: */
! 1323: CURLUcode result;
! 1324: char *oldurl;
! 1325: char *redired_url;
! 1326: CURLU *handle2;
! 1327:
! 1328: if(Curl_is_absolute_url(part, NULL, MAX_SCHEME_LEN + 1)) {
! 1329: handle2 = curl_url();
! 1330: if(!handle2)
! 1331: return CURLUE_OUT_OF_MEMORY;
! 1332: result = parseurl(part, handle2, flags);
! 1333: if(!result)
! 1334: mv_urlhandle(handle2, u);
! 1335: else
! 1336: curl_url_cleanup(handle2);
! 1337: return result;
! 1338: }
! 1339: /* extract the full "old" URL to do the redirect on */
! 1340: result = curl_url_get(u, CURLUPART_URL, &oldurl, flags);
! 1341: if(result) {
! 1342: /* couldn't get the old URL, just use the new! */
! 1343: handle2 = curl_url();
! 1344: if(!handle2)
! 1345: return CURLUE_OUT_OF_MEMORY;
! 1346: result = parseurl(part, handle2, flags);
! 1347: if(!result)
! 1348: mv_urlhandle(handle2, u);
! 1349: else
! 1350: curl_url_cleanup(handle2);
! 1351: return result;
! 1352: }
! 1353:
! 1354: /* apply the relative part to create a new URL */
! 1355: redired_url = concat_url(oldurl, part);
! 1356: free(oldurl);
! 1357: if(!redired_url)
! 1358: return CURLUE_OUT_OF_MEMORY;
! 1359:
! 1360: /* now parse the new URL */
! 1361: handle2 = curl_url();
! 1362: if(!handle2) {
! 1363: free(redired_url);
! 1364: return CURLUE_OUT_OF_MEMORY;
! 1365: }
! 1366: result = parseurl(redired_url, handle2, flags);
! 1367: free(redired_url);
! 1368: if(!result)
! 1369: mv_urlhandle(handle2, u);
! 1370: else
! 1371: curl_url_cleanup(handle2);
! 1372: return result;
! 1373: }
! 1374: default:
! 1375: return CURLUE_UNKNOWN_PART;
! 1376: }
! 1377: DEBUGASSERT(storep);
! 1378: {
! 1379: const char *newp = part;
! 1380: size_t nalloc = strlen(part);
! 1381:
! 1382: if(nalloc > CURL_MAX_INPUT_LENGTH)
! 1383: /* excessive input length */
! 1384: return CURLUE_MALFORMED_INPUT;
! 1385:
! 1386: if(urlencode) {
! 1387: const unsigned char *i;
! 1388: char *o;
! 1389: bool free_part = FALSE;
! 1390: char *enc = malloc(nalloc * 3 + 1); /* for worst case! */
! 1391: if(!enc)
! 1392: return CURLUE_OUT_OF_MEMORY;
! 1393: if(plusencode) {
! 1394: /* space to plus */
! 1395: i = (const unsigned char *)part;
! 1396: for(o = enc; *i; ++o, ++i)
! 1397: *o = (*i == ' ') ? '+' : *i;
! 1398: *o = 0; /* zero terminate */
! 1399: part = strdup(enc);
! 1400: if(!part) {
! 1401: free(enc);
! 1402: return CURLUE_OUT_OF_MEMORY;
! 1403: }
! 1404: free_part = TRUE;
! 1405: }
! 1406: for(i = (const unsigned char *)part, o = enc; *i; i++) {
! 1407: if(Curl_isunreserved(*i) ||
! 1408: ((*i == '/') && urlskipslash) ||
! 1409: ((*i == '=') && equalsencode) ||
! 1410: ((*i == '+') && plusencode)) {
! 1411: if((*i == '=') && equalsencode)
! 1412: /* only skip the first equals sign */
! 1413: equalsencode = FALSE;
! 1414: *o = *i;
! 1415: o++;
! 1416: }
! 1417: else {
! 1418: msnprintf(o, 4, "%%%02x", *i);
! 1419: o += 3;
! 1420: }
! 1421: }
! 1422: *o = 0; /* zero terminate */
! 1423: newp = enc;
! 1424: if(free_part)
! 1425: free((char *)part);
! 1426: }
! 1427: else {
! 1428: char *p;
! 1429: newp = strdup(part);
! 1430: if(!newp)
! 1431: return CURLUE_OUT_OF_MEMORY;
! 1432: p = (char *)newp;
! 1433: while(*p) {
! 1434: /* make sure percent encoded are lower case */
! 1435: if((*p == '%') && ISXDIGIT(p[1]) && ISXDIGIT(p[2]) &&
! 1436: (ISUPPER(p[1]) || ISUPPER(p[2]))) {
! 1437: p[1] = (char)TOLOWER(p[1]);
! 1438: p[2] = (char)TOLOWER(p[2]);
! 1439: p += 3;
! 1440: }
! 1441: else
! 1442: p++;
! 1443: }
! 1444: }
! 1445:
! 1446: if(appendquery) {
! 1447: /* Append the string onto the old query. Add a '&' separator if none is
! 1448: present at the end of the exsting query already */
! 1449: size_t querylen = u->query ? strlen(u->query) : 0;
! 1450: bool addamperand = querylen && (u->query[querylen -1] != '&');
! 1451: if(querylen) {
! 1452: size_t newplen = strlen(newp);
! 1453: char *p = malloc(querylen + addamperand + newplen + 1);
! 1454: if(!p) {
! 1455: free((char *)newp);
! 1456: return CURLUE_OUT_OF_MEMORY;
! 1457: }
! 1458: strcpy(p, u->query); /* original query */
! 1459: if(addamperand)
! 1460: p[querylen] = '&'; /* ampersand */
! 1461: strcpy(&p[querylen + addamperand], newp); /* new suffix */
! 1462: free((char *)newp);
! 1463: free(*storep);
! 1464: *storep = p;
! 1465: return CURLUE_OK;
! 1466: }
! 1467: }
! 1468:
! 1469: if(what == CURLUPART_HOST) {
! 1470: if(0 == strlen(newp) && (flags & CURLU_NO_AUTHORITY)) {
! 1471: /* Skip hostname check, it's allowed to be empty. */
! 1472: }
! 1473: else {
! 1474: if(hostname_check(u, (char *)newp)) {
! 1475: free((char *)newp);
! 1476: return CURLUE_MALFORMED_INPUT;
! 1477: }
! 1478: }
! 1479: }
! 1480:
! 1481: free(*storep);
! 1482: *storep = (char *)newp;
! 1483: }
! 1484: /* set after the string, to make it not assigned if the allocation above
! 1485: fails */
! 1486: if(port)
! 1487: u->portnum = port;
! 1488: return CURLUE_OK;
! 1489: }
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