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Diffstat (limited to 'Utilities/cmcurl/lib/urlapi.c')
| -rw-r--r-- | Utilities/cmcurl/lib/urlapi.c | 1340 |
1 files changed, 1340 insertions, 0 deletions
diff --git a/Utilities/cmcurl/lib/urlapi.c b/Utilities/cmcurl/lib/urlapi.c new file mode 100644 index 0000000..c53e523 --- /dev/null +++ b/Utilities/cmcurl/lib/urlapi.c @@ -0,0 +1,1340 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al. + * + * This software is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at https://curl.haxx.se/docs/copyright.html. + * + * You may opt to use, copy, modify, merge, publish, distribute and/or sell + * copies of the Software, and permit persons to whom the Software is + * furnished to do so, under the terms of the COPYING file. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ***************************************************************************/ + +#include "curl_setup.h" + +#include "urldata.h" +#include "urlapi-int.h" +#include "strcase.h" +#include "dotdot.h" +#include "url.h" +#include "escape.h" +#include "curl_ctype.h" + +/* The last 3 #include files should be in this order */ +#include "curl_printf.h" +#include "curl_memory.h" +#include "memdebug.h" + + /* MSDOS/Windows style drive prefix, eg c: in c:foo */ +#define STARTS_WITH_DRIVE_PREFIX(str) \ + ((('a' <= str[0] && str[0] <= 'z') || \ + ('A' <= str[0] && str[0] <= 'Z')) && \ + (str[1] == ':')) + + /* MSDOS/Windows style drive prefix, optionally with + * a '|' instead of ':', followed by a slash or NUL */ +#define STARTS_WITH_URL_DRIVE_PREFIX(str) \ + ((('a' <= (str)[0] && (str)[0] <= 'z') || \ + ('A' <= (str)[0] && (str)[0] <= 'Z')) && \ + ((str)[1] == ':' || (str)[1] == '|') && \ + ((str)[2] == '/' || (str)[2] == '\\' || (str)[2] == 0)) + +/* Internal representation of CURLU. Point to URL-encoded strings. */ +struct Curl_URL { + char *scheme; + char *user; + char *password; + char *options; /* IMAP only? */ + char *host; + char *port; + char *path; + char *query; + char *fragment; + + char *scratch; /* temporary scratch area */ + long portnum; /* the numerical version */ +}; + +#define DEFAULT_SCHEME "https" + +static void free_urlhandle(struct Curl_URL *u) +{ + free(u->scheme); + free(u->user); + free(u->password); + free(u->options); + free(u->host); + free(u->port); + free(u->path); + free(u->query); + free(u->fragment); + free(u->scratch); +} + +/* move the full contents of one handle onto another and + free the original */ +static void mv_urlhandle(struct Curl_URL *from, + struct Curl_URL *to) +{ + free_urlhandle(to); + *to = *from; + free(from); +} + +/* + * Find the separator at the end of the host name, or the '?' in cases like + * http://www.url.com?id=2380 + */ +static const char *find_host_sep(const char *url) +{ + const char *sep; + const char *query; + + /* Find the start of the hostname */ + sep = strstr(url, "//"); + if(!sep) + sep = url; + else + sep += 2; + + query = strchr(sep, '?'); + sep = strchr(sep, '/'); + + if(!sep) + sep = url + strlen(url); + + if(!query) + query = url + strlen(url); + + return sep < query ? sep : query; +} + +/* + * Decide in an encoding-independent manner whether a character in an + * URL must be escaped. The same criterion must be used in strlen_url() + * and strcpy_url(). + */ +static bool urlchar_needs_escaping(int c) +{ + return !(ISCNTRL(c) || ISSPACE(c) || ISGRAPH(c)); +} + +/* + * strlen_url() returns the length of the given URL if the spaces within the + * URL were properly URL encoded. + * URL encoding should be skipped for host names, otherwise IDN resolution + * will fail. + */ +size_t Curl_strlen_url(const char *url, bool relative) +{ + const unsigned char *ptr; + size_t newlen = 0; + bool left = TRUE; /* left side of the ? */ + const unsigned char *host_sep = (const unsigned char *) url; + + if(!relative) + host_sep = (const unsigned char *) find_host_sep(url); + + for(ptr = (unsigned char *)url; *ptr; ptr++) { + + if(ptr < host_sep) { + ++newlen; + continue; + } + + switch(*ptr) { + case '?': + left = FALSE; + /* FALLTHROUGH */ + default: + if(urlchar_needs_escaping(*ptr)) + newlen += 2; + newlen++; + break; + case ' ': + if(left) + newlen += 3; + else + newlen++; + break; + } + } + return newlen; +} + +/* strcpy_url() copies a url to a output buffer and URL-encodes the spaces in + * the source URL accordingly. + * URL encoding should be skipped for host names, otherwise IDN resolution + * will fail. + */ +void Curl_strcpy_url(char *output, const char *url, bool relative) +{ + /* we must add this with whitespace-replacing */ + bool left = TRUE; + const unsigned char *iptr; + char *optr = output; + const unsigned char *host_sep = (const unsigned char *) url; + + if(!relative) + host_sep = (const unsigned char *) find_host_sep(url); + + for(iptr = (unsigned char *)url; /* read from here */ + *iptr; /* until zero byte */ + iptr++) { + + if(iptr < host_sep) { + *optr++ = *iptr; + continue; + } + + switch(*iptr) { + case '?': + left = FALSE; + /* FALLTHROUGH */ + default: + if(urlchar_needs_escaping(*iptr)) { + snprintf(optr, 4, "%%%02x", *iptr); + optr += 3; + } + else + *optr++=*iptr; + break; + case ' ': + if(left) { + *optr++='%'; /* add a '%' */ + *optr++='2'; /* add a '2' */ + *optr++='0'; /* add a '0' */ + } + else + *optr++='+'; /* add a '+' here */ + break; + } + } + *optr = 0; /* zero terminate output buffer */ + +} + +/* + * Returns true if the given URL is absolute (as opposed to relative) within + * the buffer size. Returns the scheme in the buffer if TRUE and 'buf' is + * non-NULL. + */ +bool Curl_is_absolute_url(const char *url, char *buf, size_t buflen) +{ + size_t i; +#ifdef WIN32 + if(STARTS_WITH_DRIVE_PREFIX(url)) + return FALSE; +#endif + for(i = 0; i < buflen && url[i]; ++i) { + char s = url[i]; + if(s == ':') { + if(buf) + buf[i] = 0; + return TRUE; + } + /* RFC 3986 3.1 explains: + scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) + */ + else if(ISALNUM(s) || (s == '+') || (s == '-') || (s == '.') ) { + if(buf) + buf[i] = (char)TOLOWER(s); + } + else + break; + } + return FALSE; +} + +/* + * Concatenate a relative URL to a base URL making it absolute. + * URL-encodes any spaces. + * The returned pointer must be freed by the caller unless NULL + * (returns NULL on out of memory). + */ +char *Curl_concat_url(const char *base, const char *relurl) +{ + /*** + TRY to append this new path to the old URL + to the right of the host part. Oh crap, this is doomed to cause + problems in the future... + */ + char *newest; + char *protsep; + char *pathsep; + size_t newlen; + bool host_changed = FALSE; + + const char *useurl = relurl; + size_t urllen; + + /* we must make our own copy of the URL to play with, as it may + point to read-only data */ + char *url_clone = strdup(base); + + if(!url_clone) + return NULL; /* skip out of this NOW */ + + /* protsep points to the start of the host name */ + protsep = strstr(url_clone, "//"); + if(!protsep) + protsep = url_clone; + else + protsep += 2; /* pass the slashes */ + + if('/' != relurl[0]) { + int level = 0; + + /* First we need to find out if there's a ?-letter in the URL, + and cut it and the right-side of that off */ + pathsep = strchr(protsep, '?'); + if(pathsep) + *pathsep = 0; + + /* we have a relative path to append to the last slash if there's one + available, or if the new URL is just a query string (starts with a + '?') we append the new one at the end of the entire currently worked + out URL */ + if(useurl[0] != '?') { + pathsep = strrchr(protsep, '/'); + if(pathsep) + *pathsep = 0; + } + + /* Check if there's any slash after the host name, and if so, remember + that position instead */ + pathsep = strchr(protsep, '/'); + if(pathsep) + protsep = pathsep + 1; + else + protsep = NULL; + + /* now deal with one "./" or any amount of "../" in the newurl + and act accordingly */ + + if((useurl[0] == '.') && (useurl[1] == '/')) + useurl += 2; /* just skip the "./" */ + + while((useurl[0] == '.') && + (useurl[1] == '.') && + (useurl[2] == '/')) { + level++; + useurl += 3; /* pass the "../" */ + } + + if(protsep) { + while(level--) { + /* cut off one more level from the right of the original URL */ + pathsep = strrchr(protsep, '/'); + if(pathsep) + *pathsep = 0; + else { + *protsep = 0; + break; + } + } + } + } + else { + /* We got a new absolute path for this server */ + + if((relurl[0] == '/') && (relurl[1] == '/')) { + /* the new URL starts with //, just keep the protocol part from the + original one */ + *protsep = 0; + useurl = &relurl[2]; /* we keep the slashes from the original, so we + skip the new ones */ + host_changed = TRUE; + } + else { + /* cut off the original URL from the first slash, or deal with URLs + without slash */ + pathsep = strchr(protsep, '/'); + if(pathsep) { + /* When people use badly formatted URLs, such as + "http://www.url.com?dir=/home/daniel" we must not use the first + slash, if there's a ?-letter before it! */ + char *sep = strchr(protsep, '?'); + if(sep && (sep < pathsep)) + pathsep = sep; + *pathsep = 0; + } + else { + /* There was no slash. Now, since we might be operating on a badly + formatted URL, such as "http://www.url.com?id=2380" which doesn't + use a slash separator as it is supposed to, we need to check for a + ?-letter as well! */ + pathsep = strchr(protsep, '?'); + if(pathsep) + *pathsep = 0; + } + } + } + + /* If the new part contains a space, this is a mighty stupid redirect + but we still make an effort to do "right". To the left of a '?' + letter we replace each space with %20 while it is replaced with '+' + on the right side of the '?' letter. + */ + newlen = Curl_strlen_url(useurl, !host_changed); + + urllen = strlen(url_clone); + + newest = malloc(urllen + 1 + /* possible slash */ + newlen + 1 /* zero byte */); + + if(!newest) { + free(url_clone); /* don't leak this */ + return NULL; + } + + /* copy over the root url part */ + memcpy(newest, url_clone, urllen); + + /* check if we need to append a slash */ + if(('/' == useurl[0]) || (protsep && !*protsep) || ('?' == useurl[0])) + ; + else + newest[urllen++]='/'; + + /* then append the new piece on the right side */ + Curl_strcpy_url(&newest[urllen], useurl, !host_changed); + + free(url_clone); + + return newest; +} + +/* + * parse_hostname_login() + * + * Parse the login details (user name, password and options) from the URL and + * strip them out of the host name + * + */ +static CURLUcode parse_hostname_login(struct Curl_URL *u, + const struct Curl_handler *h, + char **hostname, + unsigned int flags) +{ + CURLUcode result = CURLUE_OK; + CURLcode ccode; + char *userp = NULL; + char *passwdp = NULL; + char *optionsp = NULL; + + /* At this point, we're hoping all the other special cases have + * been taken care of, so conn->host.name is at most + * [user[:password][;options]]@]hostname + * + * We need somewhere to put the embedded details, so do that first. + */ + + char *ptr = strchr(*hostname, '@'); + char *login = *hostname; + + if(!ptr) + goto out; + + /* We will now try to extract the + * possible login information in a string like: + * ftp://user:password@ftp.my.site:8021/README */ + *hostname = ++ptr; + + /* We could use the login information in the URL so extract it. Only parse + options if the handler says we should. Note that 'h' might be NULL! */ + ccode = Curl_parse_login_details(login, ptr - login - 1, + &userp, &passwdp, + (h && (h->flags & PROTOPT_URLOPTIONS)) ? + &optionsp:NULL); + if(ccode) { + result = CURLUE_MALFORMED_INPUT; + goto out; + } + + if(userp) { + if(flags & CURLU_DISALLOW_USER) { + /* Option DISALLOW_USER is set and url contains username. */ + result = CURLUE_USER_NOT_ALLOWED; + goto out; + } + + u->user = userp; + } + + if(passwdp) + u->password = passwdp; + + if(optionsp) + u->options = optionsp; + + return CURLUE_OK; + out: + + free(userp); + free(passwdp); + free(optionsp); + + return result; +} + +static CURLUcode parse_port(struct Curl_URL *u, char *hostname) +{ + char *portptr; + char endbracket; + int len; + + if((1 == sscanf(hostname, "[%*45[0123456789abcdefABCDEF:.%%]%c%n", + &endbracket, &len)) && + (']' == endbracket)) { + /* this is a RFC2732-style specified IP-address */ + portptr = &hostname[len]; + if (*portptr != ':') + return CURLUE_MALFORMED_INPUT; + } + else + portptr = strchr(hostname, ':'); + + if(portptr) { + char *rest; + long port; + char portbuf[7]; + + if(!ISDIGIT(portptr[1])) + return CURLUE_BAD_PORT_NUMBER; + + port = strtol(portptr + 1, &rest, 10); /* Port number must be decimal */ + + if((port <= 0) || (port > 0xffff)) + /* Single unix standard says port numbers are 16 bits long, but we don't + treat port zero as OK. */ + return CURLUE_BAD_PORT_NUMBER; + + if(rest[0]) + return CURLUE_BAD_PORT_NUMBER; + + if(rest != &portptr[1]) { + *portptr++ = '\0'; /* cut off the name there */ + *rest = 0; + /* generate a new to get rid of leading zeroes etc */ + snprintf(portbuf, sizeof(portbuf), "%ld", port); + u->portnum = port; + u->port = strdup(portbuf); + if(!u->port) + return CURLUE_OUT_OF_MEMORY; + } + else { + /* Browser behavior adaptation. If there's a colon with no digits after, + just cut off the name there which makes us ignore the colon and just + use the default port. Firefox and Chrome both do that. */ + *portptr = '\0'; + } + } + + return CURLUE_OK; +} + +/* scan for byte values < 31 or 127 */ +static CURLUcode junkscan(char *part) +{ + char badbytes[]={ + /* */ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x7f, + 0x00 /* zero terminate */ + }; + if(part) { + size_t n = strlen(part); + size_t nfine = strcspn(part, badbytes); + if(nfine != n) + /* since we don't know which part is scanned, return a generic error + code */ + return CURLUE_MALFORMED_INPUT; + } + return CURLUE_OK; +} + +static CURLUcode hostname_check(char *hostname, unsigned int flags) +{ + const char *l = NULL; /* accepted characters */ + size_t len; + size_t hlen = strlen(hostname); + (void)flags; + + if(hostname[0] == '[') { + hostname++; + l = "0123456789abcdefABCDEF::.%"; + hlen -= 2; + } + + if(l) { + /* only valid letters are ok */ + len = strspn(hostname, l); + if(hlen != len) + /* hostname with bad content */ + return CURLUE_MALFORMED_INPUT; + } + else { + /* letters from the second string is not ok */ + len = strcspn(hostname, " "); + if(hlen != len) + /* hostname with bad content */ + return CURLUE_MALFORMED_INPUT; + } + return CURLUE_OK; +} + +#define HOSTNAME_END(x) (((x) == '/') || ((x) == '?') || ((x) == '#')) + +static CURLUcode seturl(const char *url, CURLU *u, unsigned int flags) +{ + char *path; + bool path_alloced = FALSE; + char *hostname; + char *query = NULL; + char *fragment = NULL; + CURLUcode result; + bool url_has_scheme = FALSE; + char schemebuf[MAX_SCHEME_LEN]; + char *schemep = NULL; + size_t schemelen = 0; + size_t urllen; + const struct Curl_handler *h = NULL; + + if(!url) + return CURLUE_MALFORMED_INPUT; + + /************************************************************* + * Parse the URL. + ************************************************************/ + /* allocate scratch area */ + urllen = strlen(url); + path = u->scratch = malloc(urllen * 2 + 2); + if(!path) + return CURLUE_OUT_OF_MEMORY; + + hostname = &path[urllen + 1]; + hostname[0] = 0; + + if(Curl_is_absolute_url(url, schemebuf, sizeof(schemebuf))) { + url_has_scheme = TRUE; + schemelen = strlen(schemebuf); + } + + /* handle the file: scheme */ + if(url_has_scheme && strcasecompare(schemebuf, "file")) { + /* path has been allocated large enough to hold this */ + strcpy(path, &url[5]); + + hostname = NULL; /* no host for file: URLs */ + u->scheme = strdup("file"); + if(!u->scheme) + return CURLUE_OUT_OF_MEMORY; + + /* Extra handling URLs with an authority component (i.e. that start with + * "file://") + * + * We allow omitted hostname (e.g. file:/<path>) -- valid according to + * RFC 8089, but not the (current) WHAT-WG URL spec. + */ + if(path[0] == '/' && path[1] == '/') { + /* swallow the two slashes */ + char *ptr = &path[2]; + + /* + * According to RFC 8089, a file: URL can be reliably dereferenced if: + * + * o it has no/blank hostname, or + * + * o the hostname matches "localhost" (case-insensitively), or + * + * o the hostname is a FQDN that resolves to this machine. + * + * For brevity, we only consider URLs with empty, "localhost", or + * "127.0.0.1" hostnames as local. + * + * Additionally, there is an exception for URLs with a Windows drive + * letter in the authority (which was accidentally omitted from RFC 8089 + * Appendix E, but believe me, it was meant to be there. --MK) + */ + if(ptr[0] != '/' && !STARTS_WITH_URL_DRIVE_PREFIX(ptr)) { + /* the URL includes a host name, it must match "localhost" or + "127.0.0.1" to be valid */ + if(!checkprefix("localhost/", ptr) && + !checkprefix("127.0.0.1/", ptr)) { + /* Invalid file://hostname/, expected localhost or 127.0.0.1 or + none */ + return CURLUE_MALFORMED_INPUT; + } + ptr += 9; /* now points to the slash after the host */ + } + + path = ptr; + } + +#if !defined(MSDOS) && !defined(WIN32) && !defined(__CYGWIN__) + /* Don't allow Windows drive letters when not in Windows. + * This catches both "file:/c:" and "file:c:" */ + if(('/' == path[0] && STARTS_WITH_URL_DRIVE_PREFIX(&path[1])) || + STARTS_WITH_URL_DRIVE_PREFIX(path)) { + /* File drive letters are only accepted in MSDOS/Windows */ + return CURLUE_MALFORMED_INPUT; + } +#else + /* If the path starts with a slash and a drive letter, ditch the slash */ + if('/' == path[0] && STARTS_WITH_URL_DRIVE_PREFIX(&path[1])) { + /* This cannot be done with strcpy, as the memory chunks overlap! */ + memmove(path, &path[1], strlen(&path[1]) + 1); + } +#endif + + } + else { + /* clear path */ + const char *p; + const char *hostp; + size_t len; + path[0] = 0; + + if(url_has_scheme) { + int i = 0; + p = &url[schemelen + 1]; + while(p && (*p == '/') && (i < 4)) { + p++; + i++; + } + if((i < 1) || (i>3)) + /* less than one or more than three slashes */ + return CURLUE_MALFORMED_INPUT; + + schemep = schemebuf; + if(!Curl_builtin_scheme(schemep) && + !(flags & CURLU_NON_SUPPORT_SCHEME)) + return CURLUE_UNSUPPORTED_SCHEME; + + if(junkscan(schemep)) + return CURLUE_MALFORMED_INPUT; + } + else { + /* no scheme! */ + + if(!(flags & (CURLU_DEFAULT_SCHEME|CURLU_GUESS_SCHEME))) + return CURLUE_MALFORMED_INPUT; + if(flags & CURLU_DEFAULT_SCHEME) + schemep = (char *) DEFAULT_SCHEME; + + /* + * The URL was badly formatted, let's try without scheme specified. + */ + p = url; + } + hostp = p; /* host name starts here */ + + while(*p && !HOSTNAME_END(*p)) /* find end of host name */ + p++; + + len = p - hostp; + if(!len) + return CURLUE_MALFORMED_INPUT; + + memcpy(hostname, hostp, len); + hostname[len] = 0; + + if((flags & CURLU_GUESS_SCHEME) && !schemep) { + /* legacy curl-style guess based on host name */ + if(checkprefix("ftp.", hostname)) + schemep = (char *)"ftp"; + else if(checkprefix("dict.", hostname)) + schemep = (char *)"dict"; + else if(checkprefix("ldap.", hostname)) + schemep = (char *)"ldap"; + else if(checkprefix("imap.", hostname)) + schemep = (char *)"imap"; + else if(checkprefix("smtp.", hostname)) + schemep = (char *)"smtp"; + else if(checkprefix("pop3.", hostname)) + schemep = (char *)"pop3"; + else + schemep = (char *)"http"; + } + + len = strlen(p); + memcpy(path, p, len); + path[len] = 0; + + u->scheme = strdup(schemep); + if(!u->scheme) + return CURLUE_OUT_OF_MEMORY; + } + + /* if this is a known scheme, get some details */ + h = Curl_builtin_scheme(u->scheme); + + if(junkscan(path)) + return CURLUE_MALFORMED_INPUT; + + query = strchr(path, '?'); + if(query) + *query++ = 0; + + fragment = strchr(query?query:path, '#'); + if(fragment) + *fragment++ = 0; + + if(!path[0]) + /* if there's no path set, unset */ + path = NULL; + else if(!(flags & CURLU_PATH_AS_IS)) { + /* sanitise paths and remove ../ and ./ sequences according to RFC3986 */ + char *newp = Curl_dedotdotify(path); + if(!newp) + return CURLUE_OUT_OF_MEMORY; + + if(strcmp(newp, path)) { + /* if we got a new version */ + path = newp; + path_alloced = TRUE; + } + else + free(newp); + } + if(path) { + u->path = path_alloced?path:strdup(path); + if(!u->path) + return CURLUE_OUT_OF_MEMORY; + } + + if(hostname) { + /* + * Parse the login details and strip them out of the host name. + */ + if(junkscan(hostname)) + return CURLUE_MALFORMED_INPUT; + + result = parse_hostname_login(u, h, &hostname, flags); + if(result) + return result; + + result = parse_port(u, hostname); + if(result) + return result; + + result = hostname_check(hostname, flags); + if(result) + return result; + + u->host = strdup(hostname); + if(!u->host) + return CURLUE_OUT_OF_MEMORY; + } + + if(query && query[0]) { + u->query = strdup(query); + if(!u->query) + return CURLUE_OUT_OF_MEMORY; + } + if(fragment && fragment[0]) { + u->fragment = strdup(fragment); + if(!u->fragment) + return CURLUE_OUT_OF_MEMORY; + } + + free(u->scratch); + u->scratch = NULL; + + return CURLUE_OK; +} + +/* + * Parse the URL and set the relevant members of the Curl_URL struct. + */ +static CURLUcode parseurl(const char *url, CURLU *u, unsigned int flags) +{ + CURLUcode result = seturl(url, u, flags); + if(result) { + free_urlhandle(u); + memset(u, 0, sizeof(struct Curl_URL)); + } + return result; +} + +/* + */ +CURLU *curl_url(void) +{ + return calloc(sizeof(struct Curl_URL), 1); +} + +void curl_url_cleanup(CURLU *u) +{ + if(u) { + free_urlhandle(u); + free(u); + } +} + +#define DUP(dest, src, name) \ + if(src->name) { \ + dest->name = strdup(src->name); \ + if(!dest->name) \ + goto fail; \ + } + +CURLU *curl_url_dup(CURLU *in) +{ + struct Curl_URL *u = calloc(sizeof(struct Curl_URL), 1); + if(u) { + DUP(u, in, scheme); + DUP(u, in, user); + DUP(u, in, password); + DUP(u, in, options); + DUP(u, in, host); + DUP(u, in, port); + DUP(u, in, path); + DUP(u, in, query); + DUP(u, in, fragment); + u->portnum = in->portnum; + } + return u; + fail: + curl_url_cleanup(u); + return NULL; +} + +CURLUcode curl_url_get(CURLU *u, CURLUPart what, + char **part, unsigned int flags) +{ + char *ptr; + CURLUcode ifmissing = CURLUE_UNKNOWN_PART; + char portbuf[7]; + bool urldecode = (flags & CURLU_URLDECODE)?1:0; + bool plusdecode = FALSE; + (void)flags; + if(!u) + return CURLUE_BAD_HANDLE; + if(!part) + return CURLUE_BAD_PARTPOINTER; + *part = NULL; + + switch(what) { + case CURLUPART_SCHEME: + ptr = u->scheme; + ifmissing = CURLUE_NO_SCHEME; + urldecode = FALSE; /* never for schemes */ + break; + case CURLUPART_USER: + ptr = u->user; + ifmissing = CURLUE_NO_USER; + break; + case CURLUPART_PASSWORD: + ptr = u->password; + ifmissing = CURLUE_NO_PASSWORD; + break; + case CURLUPART_OPTIONS: + ptr = u->options; + ifmissing = CURLUE_NO_OPTIONS; + break; + case CURLUPART_HOST: + ptr = u->host; + ifmissing = CURLUE_NO_HOST; + break; + case CURLUPART_PORT: + ptr = u->port; + ifmissing = CURLUE_NO_PORT; + urldecode = FALSE; /* never for port */ + if(!ptr && (flags & CURLU_DEFAULT_PORT) && u->scheme) { + /* there's no stored port number, but asked to deliver + a default one for the scheme */ + const struct Curl_handler *h = + Curl_builtin_scheme(u->scheme); + if(h) { + snprintf(portbuf, sizeof(portbuf), "%ld", h->defport); + ptr = portbuf; + } + } + else if(ptr && u->scheme) { + /* there is a stored port number, but ask to inhibit if + it matches the default one for the scheme */ + const struct Curl_handler *h = + Curl_builtin_scheme(u->scheme); + if(h && (h->defport == u->portnum) && + (flags & CURLU_NO_DEFAULT_PORT)) + ptr = NULL; + } + break; + case CURLUPART_PATH: + ptr = u->path; + if(!ptr) { + ptr = u->path = strdup("/"); + if(!u->path) + return CURLUE_OUT_OF_MEMORY; + } + break; + case CURLUPART_QUERY: + ptr = u->query; + ifmissing = CURLUE_NO_QUERY; + plusdecode = urldecode; + break; + case CURLUPART_FRAGMENT: + ptr = u->fragment; + ifmissing = CURLUE_NO_FRAGMENT; + break; + case CURLUPART_URL: { + char *url; + char *scheme; + char *options = u->options; + char *port = u->port; + if(u->scheme && strcasecompare("file", u->scheme)) { + url = aprintf("file://%s%s%s", + u->path, + u->fragment? "#": "", + u->fragment? u->fragment : ""); + } + else if(!u->host) + return CURLUE_NO_HOST; + else { + const struct Curl_handler *h = NULL; + if(u->scheme) + scheme = u->scheme; + else if(flags & CURLU_DEFAULT_SCHEME) + scheme = (char *) DEFAULT_SCHEME; + else + return CURLUE_NO_SCHEME; + + if(scheme) { + h = Curl_builtin_scheme(scheme); + if(!port && (flags & CURLU_DEFAULT_PORT)) { + /* there's no stored port number, but asked to deliver + a default one for the scheme */ + if(h) { + snprintf(portbuf, sizeof(portbuf), "%ld", h->defport); + port = portbuf; + } + } + else if(port) { + /* there is a stored port number, but asked to inhibit if it matches + the default one for the scheme */ + if(h && (h->defport == u->portnum) && + (flags & CURLU_NO_DEFAULT_PORT)) + port = NULL; + } + } + if(h && !(h->flags & PROTOPT_URLOPTIONS)) + options = NULL; + + url = aprintf("%s://%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", + scheme, + u->user ? u->user : "", + u->password ? ":": "", + u->password ? u->password : "", + options ? ";" : "", + options ? options : "", + (u->user || u->password || options) ? "@": "", + u->host, + port ? ":": "", + port ? port : "", + (u->path && (u->path[0] != '/')) ? "/": "", + u->path ? u->path : "/", + u->query? "?": "", + u->query? u->query : "", + u->fragment? "#": "", + u->fragment? u->fragment : ""); + } + if(!url) + return CURLUE_OUT_OF_MEMORY; + *part = url; + return CURLUE_OK; + break; + } + default: + ptr = NULL; + } + if(ptr) { + *part = strdup(ptr); + if(!*part) + return CURLUE_OUT_OF_MEMORY; + if(plusdecode) { + /* convert + to space */ + char *plus; + for(plus = *part; *plus; ++plus) { + if(*plus == '+') + *plus = ' '; + } + } + if(urldecode) { + char *decoded; + size_t dlen; + CURLcode res = Curl_urldecode(NULL, *part, 0, &decoded, &dlen, TRUE); + free(*part); + if(res) { + *part = NULL; + return CURLUE_URLDECODE; + } + *part = decoded; + } + return CURLUE_OK; + } + else + return ifmissing; +} + +CURLUcode curl_url_set(CURLU *u, CURLUPart what, + const char *part, unsigned int flags) +{ + char **storep = NULL; + long port = 0; + bool urlencode = (flags & CURLU_URLENCODE)? 1 : 0; + bool plusencode = FALSE; + bool urlskipslash = FALSE; + bool appendquery = FALSE; + + if(!u) + return CURLUE_BAD_HANDLE; + if(!part) { + /* setting a part to NULL clears it */ + switch(what) { + case CURLUPART_URL: + break; + case CURLUPART_SCHEME: + storep = &u->scheme; + break; + case CURLUPART_USER: + storep = &u->user; + break; + case CURLUPART_PASSWORD: + storep = &u->password; + break; + case CURLUPART_OPTIONS: + storep = &u->options; + break; + case CURLUPART_HOST: + storep = &u->host; + break; + case CURLUPART_PORT: + storep = &u->port; + break; + case CURLUPART_PATH: + storep = &u->path; + break; + case CURLUPART_QUERY: + storep = &u->query; + break; + case CURLUPART_FRAGMENT: + storep = &u->fragment; + break; + default: + return CURLUE_UNKNOWN_PART; + } + if(storep && *storep) { + free(*storep); + *storep = NULL; + } + return CURLUE_OK; + } + + switch(what) { + case CURLUPART_SCHEME: + if(!(flags & CURLU_NON_SUPPORT_SCHEME) && + /* verify that it is a fine scheme */ + !Curl_builtin_scheme(part)) + return CURLUE_UNSUPPORTED_SCHEME; + storep = &u->scheme; + urlencode = FALSE; /* never */ + break; + case CURLUPART_USER: + storep = &u->user; + break; + case CURLUPART_PASSWORD: + storep = &u->password; + break; + case CURLUPART_OPTIONS: + storep = &u->options; + break; + case CURLUPART_HOST: + storep = &u->host; + break; + case CURLUPART_PORT: + urlencode = FALSE; /* never */ + port = strtol(part, NULL, 10); /* Port number must be decimal */ + if((port <= 0) || (port > 0xffff)) + return CURLUE_BAD_PORT_NUMBER; + storep = &u->port; + break; + case CURLUPART_PATH: + urlskipslash = TRUE; + storep = &u->path; + break; + case CURLUPART_QUERY: + plusencode = urlencode; + appendquery = (flags & CURLU_APPENDQUERY)?1:0; + storep = &u->query; + break; + case CURLUPART_FRAGMENT: + storep = &u->fragment; + break; + case CURLUPART_URL: { + /* + * Allow a new URL to replace the existing (if any) contents. + * + * If the existing contents is enough for a URL, allow a relative URL to + * replace it. + */ + CURLUcode result; + char *oldurl; + char *redired_url; + CURLU *handle2; + + if(Curl_is_absolute_url(part, NULL, MAX_SCHEME_LEN)) { + handle2 = curl_url(); + if(!handle2) + return CURLUE_OUT_OF_MEMORY; + result = parseurl(part, handle2, flags); + if(!result) + mv_urlhandle(handle2, u); + else + curl_url_cleanup(handle2); + return result; + } + /* extract the full "old" URL to do the redirect on */ + result = curl_url_get(u, CURLUPART_URL, &oldurl, flags); + if(result) { + /* couldn't get the old URL, just use the new! */ + handle2 = curl_url(); + if(!handle2) + return CURLUE_OUT_OF_MEMORY; + result = parseurl(part, handle2, flags); + if(!result) + mv_urlhandle(handle2, u); + else + curl_url_cleanup(handle2); + return result; + } + + /* apply the relative part to create a new URL */ + redired_url = Curl_concat_url(oldurl, part); + free(oldurl); + if(!redired_url) + return CURLUE_OUT_OF_MEMORY; + + /* now parse the new URL */ + handle2 = curl_url(); + if(!handle2) { + free(redired_url); + return CURLUE_OUT_OF_MEMORY; + } + result = parseurl(redired_url, handle2, flags); + free(redired_url); + if(!result) + mv_urlhandle(handle2, u); + else + curl_url_cleanup(handle2); + return result; + } + default: + return CURLUE_UNKNOWN_PART; + } + if(storep) { + const char *newp = part; + size_t nalloc = strlen(part); + + if(urlencode) { + const char *i; + char *o; + bool free_part = FALSE; + char *enc = malloc(nalloc * 3 + 1); /* for worst case! */ + if(!enc) + return CURLUE_OUT_OF_MEMORY; + if(plusencode) { + /* space to plus */ + i = part; + for(o = enc; *i; ++o, ++i) + *o = (*i == ' ') ? '+' : *i; + *o = 0; /* zero terminate */ + part = strdup(enc); + if(!part) { + free(enc); + return CURLUE_OUT_OF_MEMORY; + } + free_part = TRUE; + } + for(i = part, o = enc; *i; i++) { + if(Curl_isunreserved(*i) || + ((*i == '/') && urlskipslash) || + ((*i == '=') && appendquery) || + ((*i == '+') && plusencode)) { + *o = *i; + o++; + } + else { + snprintf(o, 4, "%%%02x", *i); + o += 3; + } + } + *o = 0; /* zero terminate */ + newp = enc; + if(free_part) + free((char *)part); + } + else { + char *p; + newp = strdup(part); + if(!newp) + return CURLUE_OUT_OF_MEMORY; + p = (char *)newp; + while(*p) { + /* make sure percent encoded are lower case */ + if((*p == '%') && ISXDIGIT(p[1]) && ISXDIGIT(p[2]) && + (ISUPPER(p[1]) || ISUPPER(p[2]))) { + p[1] = (char)TOLOWER(p[1]); + p[2] = (char)TOLOWER(p[2]); + p += 3; + } + else + p++; + } + } + + if(appendquery) { + /* Append the string onto the old query. Add a '&' separator if none is + present at the end of the exsting query already */ + size_t querylen = u->query ? strlen(u->query) : 0; + bool addamperand = querylen && (u->query[querylen -1] != '&'); + if(querylen) { + size_t newplen = strlen(newp); + char *p = malloc(querylen + addamperand + newplen + 1); + if(!p) { + free((char *)newp); + return CURLUE_OUT_OF_MEMORY; + } + strcpy(p, u->query); /* original query */ + if(addamperand) + p[querylen] = '&'; /* ampersand */ + strcpy(&p[querylen + addamperand], newp); /* new suffix */ + free((char *)newp); + free(*storep); + *storep = p; + return CURLUE_OK; + } + } + + free(*storep); + *storep = (char *)newp; + } + /* set after the string, to make it not assigned if the allocation above + fails */ + if(port) + u->portnum = port; + return CURLUE_OK; +} |