/* * Copyright 2011 Michael Drake * * This file is part of NetSurf, http://www.netsurf-browser.org/ * * NetSurf is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * NetSurf is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ /** \file * NetSurf URL handling (implementation). */ #include #include #include #include #include #include "utils/errors.h" #include "utils/log.h" #include "utils/nsurl.h" #include "utils/utils.h" /* Define to enable NSURL debugging */ #undef NSURL_DEBUG static bool nsurl__is_unreserved(unsigned char c) { /* From RFC3986 section 2.3 (unreserved characters) * * unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~" * */ static const bool unreserved[256] = { false, false, false, false, false, false, false, false, /* 00 */ false, false, false, false, false, false, false, false, /* 08 */ false, false, false, false, false, false, false, false, /* 10 */ false, false, false, false, false, false, false, false, /* 18 */ false, false, false, false, false, false, false, false, /* 20 */ false, false, false, false, false, true, true, false, /* 28 */ true, true, true, true, true, true, true, true, /* 30 */ true, true, false, false, false, false, false, false, /* 38 */ false, true, true, true, true, true, true, true, /* 40 */ true, true, true, true, true, true, true, true, /* 48 */ true, true, true, true, true, true, true, true, /* 50 */ true, true, true, false, false, false, false, true, /* 58 */ false, true, true, true, true, true, true, true, /* 60 */ true, true, true, true, true, true, true, true, /* 68 */ true, true, true, true, true, true, true, true, /* 70 */ true, true, true, false, false, false, true, false, /* 78 */ false, false, false, false, false, false, false, false, /* 80 */ false, false, false, false, false, false, false, false, /* 88 */ false, false, false, false, false, false, false, false, /* 90 */ false, false, false, false, false, false, false, false, /* 98 */ false, false, false, false, false, false, false, false, /* A0 */ false, false, false, false, false, false, false, false, /* A8 */ false, false, false, false, false, false, false, false, /* B0 */ false, false, false, false, false, false, false, false, /* B8 */ false, false, false, false, false, false, false, false, /* C0 */ false, false, false, false, false, false, false, false, /* C8 */ false, false, false, false, false, false, false, false, /* D0 */ false, false, false, false, false, false, false, false, /* D8 */ false, false, false, false, false, false, false, false, /* E0 */ false, false, false, false, false, false, false, false, /* E8 */ false, false, false, false, false, false, false, false, /* F0 */ false, false, false, false, false, false, false, false /* F8 */ }; return unreserved[c]; } /* The ASCII codes which should not be percent escaped */ static bool nsurl__is_no_escape(unsigned char c) { static const bool no_escape[256] = { false, false, false, false, false, false, false, false, /* 00 */ false, false, false, false, false, false, false, false, /* 08 */ false, false, false, false, false, false, false, false, /* 10 */ false, false, false, false, false, false, false, false, /* 18 */ false, true, false, true, true, false, true, true, /* 20 */ true, true, true, true, true, true, true, true, /* 28 */ true, true, true, true, true, true, true, true, /* 30 */ true, true, true, true, false, true, false, true, /* 38 */ true, true, true, true, true, true, true, true, /* 40 */ true, true, true, true, true, true, true, true, /* 48 */ true, true, true, true, true, true, true, true, /* 50 */ true, true, true, true, false, true, false, true, /* 58 */ false, true, true, true, true, true, true, true, /* 60 */ true, true, true, true, true, true, true, true, /* 68 */ true, true, true, true, true, true, true, true, /* 70 */ true, true, true, false, true, false, true, false, /* 78 */ false, false, false, false, false, false, false, false, /* 80 */ false, false, false, false, false, false, false, false, /* 88 */ false, false, false, false, false, false, false, false, /* 90 */ false, false, false, false, false, false, false, false, /* 98 */ false, false, false, false, false, false, false, false, /* A0 */ false, false, false, false, false, false, false, false, /* A8 */ false, false, false, false, false, false, false, false, /* B0 */ false, false, false, false, false, false, false, false, /* B8 */ false, false, false, false, false, false, false, false, /* C0 */ false, false, false, false, false, false, false, false, /* C8 */ false, false, false, false, false, false, false, false, /* D0 */ false, false, false, false, false, false, false, false, /* D8 */ false, false, false, false, false, false, false, false, /* E0 */ false, false, false, false, false, false, false, false, /* E8 */ false, false, false, false, false, false, false, false, /* F0 */ false, false, false, false, false, false, false, false, /* F8 */ }; return no_escape[c]; } /** nsurl scheme type */ enum scheme_type { NSURL_SCHEME_OTHER, NSURL_SCHEME_HTTP, NSURL_SCHEME_HTTPS, NSURL_SCHEME_FTP, NSURL_SCHEME_MAILTO }; /** nsurl components */ struct nsurl_components { lwc_string *scheme; lwc_string *username; lwc_string *password; lwc_string *host; lwc_string *port; lwc_string *path; lwc_string *query; lwc_string *fragment; enum scheme_type scheme_type; }; /** * NetSurf URL object * * [scheme]://[username][:password]@[host]:[port][/path][?query][#fragment] */ struct nsurl { struct nsurl_components components; int count; /* Number of references to NetSurf URL object */ size_t length; /* Length of string */ char string[FLEX_ARRAY_LEN_DECL]; /* Full URL as a string */ }; /** Marker set, indicating positions of sections within a URL string */ struct url_markers { size_t start; /** start of URL */ size_t scheme_end; size_t authority; size_t colon_first; size_t at; size_t colon_last; size_t path; size_t query; size_t fragment; size_t end; /** end of URL */ enum scheme_type scheme_type; }; /** Marker set, indicating positions of sections within a URL string */ struct nsurl_component_lengths { size_t scheme; size_t username; size_t password; size_t host; size_t port; size_t path; size_t query; size_t fragment; }; /** Flags indicating which parts of a URL string are required for a nsurl */ enum nsurl_string_flags { NSURL_F_SCHEME = (1 << 0), NSURL_F_SCHEME_PUNCTUATION = (1 << 1), NSURL_F_AUTHORITY_PUNCTUATION = (1 << 2), NSURL_F_USERNAME = (1 << 3), NSURL_F_PASSWORD = (1 << 4), NSURL_F_CREDENTIALS_PUNCTUATION = (1 << 5), NSURL_F_HOST = (1 << 6), NSURL_F_PORT = (1 << 7), NSURL_F_AUTHORITY = (NSURL_F_USERNAME | NSURL_F_PASSWORD | NSURL_F_HOST | NSURL_F_PORT), NSURL_F_PATH = (1 << 8), NSURL_F_QUERY = (1 << 9), NSURL_F_FRAGMENT_PUNCTUATION = (1 << 10), NSURL_F_FRAGMENT = (1 << 11) }; /** Sections of a URL */ enum url_sections { URL_SCHEME, URL_CREDENTIALS, URL_HOST, URL_PATH, URL_QUERY, URL_FRAGMENT }; #define nsurl__component_copy(c) (c == NULL) ? NULL : lwc_string_ref(c) #define nsurl__component_compare(c1, c2, match) \ if (c1 && c2 && lwc_error_ok == \ lwc_string_isequal(c1, c2, match)) { \ /* do nothing */ \ } else if (c1 || c2) { \ *match = false; \ } /** * Obtains a set of markers delimiting sections in a URL string * * \param url_s URL string * \param markers Updated to mark sections in the URL string * \param joining True iff URL string is a relative URL for joining */ static void nsurl__get_string_markers(const char * const url_s, struct url_markers *markers, bool joining) { const char *pos = url_s; /** current position in url_s */ bool is_http = false; bool trailing_whitespace = false; /* Initialise marker set */ struct url_markers marker = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NSURL_SCHEME_OTHER }; /* Skip any leading whitespace in url_s */ while (isspace(*pos)) pos++; /* Record start point */ marker.start = pos - url_s; marker.scheme_end = marker.authority = marker.colon_first = marker.at = marker.colon_last = marker.path = marker.start; if (*pos == '\0') { /* Nothing but whitespace, early exit */ marker.query = marker.fragment = marker.end = marker.path; *markers = marker; return; } /* Get scheme */ if (isalpha(*pos)) { pos++; while (*pos != ':' && *pos != '\0') { if (!isalnum(*pos) && *pos != '+' && *pos != '-' && *pos != '.') { /* This character is not valid in the * scheme */ break; } pos++; } if (*pos == ':') { /* This delimits the end of the scheme */ size_t off; marker.scheme_end = pos - url_s; off = marker.scheme_end - marker.start; /* Detect http(s) and mailto for scheme specifc * normalisation */ if (off == SLEN("http") && (((*(pos - off + 0) == 'h') || (*(pos - off + 0) == 'H')) && ((*(pos - off + 1) == 't') || (*(pos - off + 1) == 'T')) && ((*(pos - off + 2) == 't') || (*(pos - off + 2) == 'T')) && ((*(pos - off + 3) == 'p') || (*(pos - off + 3) == 'P')))) { marker.scheme_type = NSURL_SCHEME_HTTP; is_http = true; } else if (off == SLEN("https") && (((*(pos - off + 0) == 'h') || (*(pos - off + 0) == 'H')) && ((*(pos - off + 1) == 't') || (*(pos - off + 1) == 'T')) && ((*(pos - off + 2) == 't') || (*(pos - off + 2) == 'T')) && ((*(pos - off + 3) == 'p') || (*(pos - off + 3) == 'P')) && ((*(pos - off + 4) == 's') || (*(pos - off + 4) == 'S')))) { marker.scheme_type = NSURL_SCHEME_HTTPS; is_http = true; } else if (off == SLEN("ftp") && (((*(pos - off + 0) == 'f') || (*(pos - off + 0) == 'F')) && ((*(pos - off + 1) == 't') || (*(pos - off + 1) == 'T')) && ((*(pos - off + 2) == 'p') || (*(pos - off + 2) == 'P')))) { marker.scheme_type = NSURL_SCHEME_FTP; } else if (off == SLEN("mailto") && (((*(pos - off + 0) == 'm') || (*(pos - off + 0) == 'M')) && ((*(pos - off + 1) == 'a') || (*(pos - off + 1) == 'A')) && ((*(pos - off + 2) == 'i') || (*(pos - off + 2) == 'I')) && ((*(pos - off + 3) == 'l') || (*(pos - off + 3) == 'L')) && ((*(pos - off + 4) == 't') || (*(pos - off + 4) == 'T')) && ((*(pos - off + 5) == 'o') || (*(pos - off + 5) == 'O')))) { marker.scheme_type = NSURL_SCHEME_MAILTO; } /* Skip over colon */ pos++; /* Mark place as start of authority */ marker.authority = marker.colon_first = marker.at = marker.colon_last = marker.path = pos - url_s; } else { /* Not found a scheme */ if (joining == false) { /* Assuming no scheme == http */ marker.scheme_type = NSURL_SCHEME_HTTP; is_http = true; } } } /* Get authority * * Two slashes always indicates the start of an authority. * * We are more relaxed in the case of http: * a. when joining, one or more slashes indicates start of authority * b. when not joining, we assume authority if no scheme was present * and in the case of mailto: when we assume there is an authority. */ if ((*pos == '/' && *(pos + 1) == '/') || (is_http && ((joining && *pos == '/') || (joining == false && marker.scheme_end != marker.start))) || marker.scheme_type == NSURL_SCHEME_MAILTO) { /* Skip over leading slashes */ if (*pos == '/') { if (is_http == false) { if (*pos == '/') pos++; if (*pos == '/') pos++; } else { while (*pos == '/') pos++; } marker.authority = marker.colon_first = marker.at = marker.colon_last = marker.path = pos - url_s; } /* Need to get (or complete) the authority */ while (*pos != '\0') { if (*pos == '/' || *pos == '?' || *pos == '#') { /* End of the authority */ break; } else if (*pos == ':' && marker.colon_first == marker.authority) { /* could be username:password or host:port * separator */ marker.colon_first = pos - url_s; } else if (*pos == ':' && marker.colon_first != marker.authority) { /* could be host:port separator */ marker.colon_last = pos - url_s; } else if (*pos == '@' && marker.at == marker.authority) { /* Credentials @ host separator */ marker.at = pos - url_s; } pos++; } marker.path = pos - url_s; } else if ((*pos == '\0' || *pos == '/') && joining == false && is_http == true) { marker.path = pos - url_s; } /* Get path * * Needs to start with '/' if there's no authority */ if (*pos == '/' || ((marker.path == marker.authority) && (*pos != '?') && (*pos != '#') && (*pos != '\0'))) { while (*(++pos) != '\0') { if (*pos == '?' || *pos == '#') { /* End of the path */ break; } } } marker.query = pos - url_s; /* Get query */ if (*pos == '?') { while (*(++pos) != '\0') { if (*pos == '#') { /* End of the query */ break; } } } marker.fragment = pos - url_s; /* Get fragment */ if (*pos == '#') { while (*(++pos) != '\0') ; } /* We got to the end of url_s. * Need to skip back over trailing whitespace to find end of URL */ pos--; if (pos >= url_s && isspace(*pos)) { trailing_whitespace = true; while (pos >= url_s && isspace(*pos)) pos--; } marker.end = pos + 1 - url_s; if (trailing_whitespace == true) { /* Ensure last url section doesn't pass end */ if (marker.fragment > marker.end) marker.fragment = marker.end; if (marker.query > marker.end) marker.query = marker.end; if (marker.path > marker.end) marker.path = marker.end; if (marker.colon_last > marker.end) marker.colon_last = marker.end; if (marker.at > marker.end) marker.at = marker.end; if (marker.colon_last > marker.end) marker.colon_last = marker.end; if (marker.fragment > marker.end) marker.fragment = marker.end; } /* Got all the URL components pegged out now */ *markers = marker; } /** * Remove dot segments from a path, as per rfc 3986, 5.2.4 * * \param path path to remove dot segments from ('\0' terminated) * \param output path with dot segments removed * \return size of output */ static size_t nsurl__remove_dot_segments(char *path, char *output) { char *path_pos = path; char *output_pos = output; while (*path_pos != '\0') { #ifdef NSURL_DEBUG LOG((" in:%s", path_pos)); LOG(("out:%.*s", output_pos - output, output)); #endif if (*path_pos == '.') { if (*(path_pos + 1) == '.' && *(path_pos + 2) == '/') { /* Found prefix of "../" */ path_pos += SLEN("../"); continue; } else if (*(path_pos + 1) == '/') { /* Found prefix of "./" */ path_pos += SLEN("./"); continue; } } else if (*path_pos == '/' && *(path_pos + 1) == '.') { if (*(path_pos + 2) == '/') { /* Found prefix of "/./" */ path_pos += SLEN("/."); continue; } else if (*(path_pos + 2) == '\0') { /* Found "/." at end of path */ *(output_pos++) = '/'; /* End of input path */ break; } else if (*(path_pos + 2) == '.') { if (*(path_pos + 3) == '/') { /* Found prefix of "/../" */ path_pos += SLEN("/.."); if (output_pos > output) output_pos--; while (output_pos > output && *output_pos != '/') output_pos--; continue; } else if (*(path_pos + 3) == '\0') { /* Found "/.." at end of path */ while (output_pos > output && *(output_pos -1 ) !='/') output_pos--; /* End of input path */ break; } } } else if (*path_pos == '.') { if (*(path_pos + 1) == '\0') { /* Found "." at end of path */ /* End of input path */ break; } else if (*(path_pos + 1) == '.' && *(path_pos + 2) == '\0') { /* Found ".." at end of path */ /* End of input path */ break; } } /* Copy first character into output path */ *output_pos++ = *path_pos++; /* Copy up to but not including next '/' */ while ((*path_pos != '/') && (*path_pos != '\0')) *output_pos++ = *path_pos++; } return output_pos - output; } /** * Get the length of the longest section * * \param m markers delimiting url sections in a string * \return the length of the longest section */ static size_t nsurl__get_longest_section(struct url_markers *m) { size_t length = m->scheme_end - m->start; /* scheme */ if (length < m->at - m->authority) /* credentials */ length = m->at - m->authority; if (length < m->path - m->at) /* host */ length = m->path - m->at; if (length < m->query - m->path) /* path */ length = m->query - m->path; if (length < m->fragment - m->query) /* query */ length = m->fragment - m->query; if (length < m->end - m->fragment) /* fragment */ length = m->end - m->fragment; return length; } /** * Converts two hexadecimal digits to a single number * * \param c1 most significant hex digit * \param c2 least significant hex digit * \return the total value of the two digit hex number, or -ve if input not hex * * For unescaping url encoded characters. */ static inline int nsurl__get_ascii_offset(char c1, char c2) { int offset; /* Use 1st char as most significant hex digit */ if (isdigit(c1)) offset = 16 * (c1 - '0'); else if (c1 >= 'a' && c1 <= 'f') offset = 16 * (c1 - 'a' + 10); else if (c1 >= 'A' && c1 <= 'F') offset = 16 * (c1 - 'A' + 10); else /* Not valid hex */ return -1; /* Use 2nd char as least significant hex digit and sum */ if (isdigit(c2)) offset += c2 - '0'; else if (c2 >= 'a' && c2 <= 'f') offset += c2 - 'a' + 10; else if (c2 >= 'A' && c2 <= 'F') offset += c2 - 'A' + 10; else /* Not valid hex */ return -1; return offset; } /** * Create the components of a NetSurf URL object for a section of a URL string * * \param url_s URL string * \param section Sets which section of URL string is to be normalised * \param pegs Set of markers delimiting the URL string's sections * \param pos_norm A buffer large enough for the normalised string (*3 + 1) * \param url A NetSurf URL object, to which components may be added * \return NSERROR_OK on success, appropriate error otherwise * * The section of url_s is normalised appropriately. */ static nserror nsurl__create_from_section(const char * const url_s, const enum url_sections section, const struct url_markers *pegs, char *pos_norm, struct nsurl_components *url) { int ascii_offset; int start = 0; int end = 0; const char *pos; const char *pos_url_s; char *norm_start = pos_norm; size_t copy_len; size_t length; enum { NSURL_F_NO_PORT = (1 << 0) } flags = 0; switch (section) { case URL_SCHEME: start = pegs->start; end = pegs->scheme_end; break; case URL_CREDENTIALS: start = pegs->authority; end = pegs->at; break; case URL_HOST: start = (pegs->at == pegs->authority && *(url_s + pegs->at) != '@') ? pegs->at : pegs->at + 1; end = pegs->path; break; case URL_PATH: start = pegs->path; end = pegs->query; break; case URL_QUERY: start = pegs->query; end = pegs->fragment; break; case URL_FRAGMENT: start = (*(url_s + pegs->fragment) != '#') ? pegs->fragment : pegs->fragment + 1; end = pegs->end; break; } length = end - start; /* Stage 1: Normalise the required section */ pos = pos_url_s = url_s + start; copy_len = 0; for (; pos < url_s + end; pos++) { if (*pos == '%' && (pos + 2 < url_s + end)) { /* Might be an escaped character needing unescaped */ /* Find which character which was escaped */ ascii_offset = nsurl__get_ascii_offset(*(pos + 1), *(pos + 2)); if (ascii_offset < 0) { /* % with invalid hex digits. */ copy_len++; continue; } if (nsurl__is_unreserved(ascii_offset) == false) { /* This character should be escaped after all, * just let it get copied */ copy_len += 3; pos += 2; continue; } if (copy_len > 0) { /* Copy up to here */ memcpy(pos_norm, pos_url_s, copy_len); pos_norm += copy_len; copy_len = 0; } /* Put the unescaped character in the normalised URL */ *(pos_norm++) = (char)ascii_offset; pos += 2; pos_url_s = pos + 1; length -= 2; } else if (nsurl__is_no_escape(*pos) == false) { /* This needs to be escaped */ if (copy_len > 0) { /* Copy up to here */ memcpy(pos_norm, pos_url_s, copy_len); pos_norm += copy_len; copy_len = 0; } /* escape */ *(pos_norm++) = '%'; *(pos_norm++) = digit2uppercase_hex( ((unsigned char)*pos) >> 4); *(pos_norm++) = digit2uppercase_hex( ((unsigned char)*pos) & 0xf); pos_url_s = pos + 1; length += 2; } else if ((section == URL_SCHEME || section == URL_HOST) && isupper(*pos)) { /* Lower case this letter */ if (copy_len > 0) { /* Copy up to here */ memcpy(pos_norm, pos_url_s, copy_len); pos_norm += copy_len; copy_len = 0; } /* Copy lower cased letter into normalised URL */ *(pos_norm++) = tolower(*pos); pos_url_s = pos + 1; } else { /* This character is safe in normalised URL */ copy_len++; } } if (copy_len > 0) { /* Copy up to here */ memcpy(pos_norm, pos_url_s, copy_len); pos_norm += copy_len; } /* Mark end of section */ (*pos_norm) = '\0'; /* Stage 2: Create the URL components for the required section */ switch (section) { case URL_SCHEME: if (length == 0) { /* No scheme, assuming http, and add to URL */ if (lwc_intern_string("http", SLEN("http"), &url->scheme) != lwc_error_ok) { return NSERROR_NOMEM; } } else { /* Add scheme to URL */ if (lwc_intern_string(norm_start, length, &url->scheme) != lwc_error_ok) { return NSERROR_NOMEM; } } break; case URL_CREDENTIALS: url->username = NULL; url->password = NULL; if (length != 0 && *norm_start != ':') { char *sec_start = norm_start; if (pegs->colon_first != pegs->authority && pegs->at > pegs->colon_first + 1) { /* there's a password */ sec_start += pegs->colon_first - pegs->authority + 1; if (lwc_intern_string(sec_start, pegs->at - pegs->colon_first -1, &url->password) != lwc_error_ok) { return NSERROR_NOMEM; } /* update start pos and length for username */ sec_start = norm_start; length -= pegs->at - pegs->colon_first; } else if (pegs->colon_first != pegs->authority && pegs->at == pegs->colon_first + 1) { /* strip username colon */ length--; } /* Username */ if (lwc_intern_string(sec_start, length, &url->username) != lwc_error_ok) { return NSERROR_NOMEM; } } break; case URL_HOST: url->host = NULL; url->port = NULL; if (length != 0) { size_t colon = 0; char *sec_start = norm_start; if (pegs->at < pegs->colon_first && pegs->colon_last == pegs->authority) { /* There's one colon and it's after @ marker */ colon = pegs->colon_first; } else if (pegs->colon_last != pegs->authority) { /* There's more than one colon */ colon = pegs->colon_last; } else { /* There's no colon that could be a port * separator */ flags |= NSURL_F_NO_PORT; } if (!(flags & NSURL_F_NO_PORT)) { /* Determine whether colon is a port separator */ sec_start += colon - pegs->at; while (++sec_start < norm_start + length) { if (!isdigit(*sec_start)) { /* Character after port isn't a * digit; not a port separator */ flags |= NSURL_F_NO_PORT; break; } } } if (!(flags & NSURL_F_NO_PORT)) { /* There's a port */ size_t skip = (pegs->at == pegs->authority) ? 1 : 0; sec_start = norm_start + colon - pegs->at + skip; if (url->scheme != NULL && url->scheme_type == NSURL_SCHEME_HTTP && length - (colon - pegs->at + skip) == 2 && *sec_start == '8' && *(sec_start + 1) == '0') { /* Scheme is http, and port is default * (80) */ flags |= NSURL_F_NO_PORT; } if (length - (colon - pegs->at + skip) <= 0) { /* No space for a port after the colon */ flags |= NSURL_F_NO_PORT; } /* Add non-redundant ports to NetSurf URL */ sec_start = norm_start + colon - pegs->at + skip; if (!(flags & NSURL_F_NO_PORT) && lwc_intern_string(sec_start, length - (colon - pegs->at + skip), &url->port) != lwc_error_ok) { return NSERROR_NOMEM; } /* update length for host */ skip = (pegs->at == pegs->authority) ? 0 : 1; length = colon - pegs->at - skip; } /* host */ if (lwc_intern_string(norm_start, length, &url->host) != lwc_error_ok) { return NSERROR_NOMEM; } } break; case URL_PATH: if (length != 0) { if (lwc_intern_string(norm_start, length, &url->path) != lwc_error_ok) { return NSERROR_NOMEM; } } else if (url->host != NULL && url->scheme_type != NSURL_SCHEME_MAILTO) { /* Set empty path to "/", if there's a host */ if (lwc_intern_string("/", SLEN("/"), &url->path) != lwc_error_ok) { return NSERROR_NOMEM; } } else { url->path = NULL; } break; case URL_QUERY: if (length != 0) { if (lwc_intern_string(norm_start, length, &url->query) != lwc_error_ok) { return NSERROR_NOMEM; } } else { url->query = NULL; } break; case URL_FRAGMENT: if (length != 0) { if (lwc_intern_string(norm_start, length, &url->fragment) != lwc_error_ok) { return NSERROR_NOMEM; } } else { url->fragment = NULL; } break; } return NSERROR_OK; } /** * Get nsurl string info; total length, component lengths, & components present * * \param url NetSurf URL components * \param parts Which parts of the URL are required in the string * \param url_l Updated to total string length * \param lengths Updated with individual component lengths * \param pflags Updated to contain relevant string flags */ static void nsurl__get_string_data(const struct nsurl_components *url, nsurl_component parts, size_t *url_l, struct nsurl_component_lengths *lengths, enum nsurl_string_flags *pflags) { enum nsurl_string_flags flags = *pflags; *url_l = 0; /* Intersection of required parts and available parts gives * the output parts */ if (url->scheme && parts & NSURL_SCHEME) { flags |= NSURL_F_SCHEME; lengths->scheme = lwc_string_length(url->scheme); *url_l += lengths->scheme; } if (url->username && parts & NSURL_USERNAME) { flags |= NSURL_F_USERNAME; lengths->username = lwc_string_length(url->username); *url_l += lengths->username; } if (url->password && parts & NSURL_PASSWORD) { flags |= NSURL_F_PASSWORD; lengths->password = lwc_string_length(url->password); *url_l += SLEN(":") + lengths->password; } if (url->host && parts & NSURL_HOST) { flags |= NSURL_F_HOST; lengths->host = lwc_string_length(url->host); *url_l += lengths->host; } if (url->port && parts & NSURL_PORT) { flags |= NSURL_F_PORT; lengths->port = lwc_string_length(url->port); *url_l += SLEN(":") + lengths->port; } if (url->path && parts & NSURL_PATH) { flags |= NSURL_F_PATH; lengths->path = lwc_string_length(url->path); *url_l += lengths->path; } if (url->query && parts & NSURL_QUERY) { flags |= NSURL_F_QUERY; lengths->query = lwc_string_length(url->query); *url_l += lengths->query; } if (url->fragment && parts & NSURL_FRAGMENT) { flags |= NSURL_F_FRAGMENT; lengths->fragment = lwc_string_length(url->fragment); *url_l += lengths->fragment; } /* Turn on any spanned punctuation */ if ((flags & NSURL_F_SCHEME) && (parts > NSURL_SCHEME)) { flags |= NSURL_F_SCHEME_PUNCTUATION; *url_l += SLEN(":"); } if ((flags & NSURL_F_SCHEME) && (flags > NSURL_F_SCHEME) && url->path && lwc_string_data(url->path)[0] == '/') { flags |= NSURL_F_AUTHORITY_PUNCTUATION; *url_l += SLEN("//"); } if ((flags & (NSURL_F_USERNAME | NSURL_F_PASSWORD)) && flags & NSURL_F_HOST) { flags |= NSURL_F_CREDENTIALS_PUNCTUATION; *url_l += SLEN("@"); } if ((flags & ~NSURL_F_FRAGMENT) && (flags & NSURL_F_FRAGMENT)) { flags |= NSURL_F_FRAGMENT_PUNCTUATION; *url_l += SLEN("#"); } *pflags = flags; } /** * Get nsurl string info; total length, component lengths, & components present * * \param url NetSurf URL components * \param url_s Updated to contain the string * \param l Individual component lengths * \param flags String flags */ static void nsurl_get_string(const struct nsurl_components *url, char *url_s, struct nsurl_component_lengths *l, enum nsurl_string_flags flags) { char *pos; /* Copy the required parts into the url string */ pos = url_s; if (flags & NSURL_F_SCHEME) { memcpy(pos, lwc_string_data(url->scheme), l->scheme); pos += l->scheme; } if (flags & NSURL_F_SCHEME_PUNCTUATION) { *(pos++) = ':'; } if (flags & NSURL_F_AUTHORITY_PUNCTUATION) { *(pos++) = '/'; *(pos++) = '/'; } if (flags & NSURL_F_USERNAME) { memcpy(pos, lwc_string_data(url->username), l->username); pos += l->username; } if (flags & NSURL_F_PASSWORD) { *(pos++) = ':'; memcpy(pos, lwc_string_data(url->password), l->password); pos += l->password; } if (flags & NSURL_F_CREDENTIALS_PUNCTUATION) { *(pos++) = '@'; } if (flags & NSURL_F_HOST) { memcpy(pos, lwc_string_data(url->host), l->host); pos += l->host; } if (flags & NSURL_F_PORT) { *(pos++) = ':'; memcpy(pos, lwc_string_data(url->port), l->port); pos += l->port; } if (flags & NSURL_F_PATH) { memcpy(pos, lwc_string_data(url->path), l->path); pos += l->path; } if (flags & NSURL_F_QUERY) { memcpy(pos, lwc_string_data(url->query), l->query); pos += l->query; } if (flags & NSURL_F_FRAGMENT) { if (flags & NSURL_F_FRAGMENT_PUNCTUATION) *(pos++) = '#'; memcpy(pos, lwc_string_data(url->fragment), l->fragment); pos += l->fragment; } *pos = '\0'; } #ifdef NSURL_DEBUG /** * Dump a NetSurf URL's internal components * * \param url The NetSurf URL to dump components of */ static void nsurl__dump(const nsurl *url) { if (url->components.scheme) LOG((" Scheme: %s", lwc_string_data(url->components.scheme))); if (url->components.username) LOG(("Username: %s", lwc_string_data(url->components.username))); if (url->components.password) LOG(("Password: %s", lwc_string_data(url->components.password))); if (url->components.host) LOG((" Host: %s", lwc_string_data(url->components.host))); if (url->components.port) LOG((" Port: %s", lwc_string_data(url->components.port))); if (url->components.path) LOG((" Path: %s", lwc_string_data(url->components.path))); if (url->components.query) LOG((" Query: %s", lwc_string_data(url->components.query))); if (url->components.fragment) LOG(("Fragment: %s", lwc_string_data(url->components.fragment))); } #endif /****************************************************************************** * NetSurf URL Public API * ******************************************************************************/ /* exported interface, documented in nsurl.h */ nserror nsurl_create(const char * const url_s, nsurl **url) { struct url_markers m; struct nsurl_components c; size_t length; char *buff; struct nsurl_component_lengths str_len = { 0, 0, 0, 0, 0, 0, 0, 0 }; enum nsurl_string_flags str_flags = 0; nserror e = NSERROR_OK; assert(url_s != NULL); /* Peg out the URL sections */ nsurl__get_string_markers(url_s, &m, false); /* Get the length of the longest section */ length = nsurl__get_longest_section(&m); /* Allocate enough memory to url escape the longest section */ buff = malloc(length * 3 + 1); if (buff == NULL) return NSERROR_NOMEM; /* Set scheme type */ c.scheme_type = m.scheme_type; /* Build NetSurf URL object from sections */ e |= nsurl__create_from_section(url_s, URL_SCHEME, &m, buff, &c); e |= nsurl__create_from_section(url_s, URL_CREDENTIALS, &m, buff, &c); e |= nsurl__create_from_section(url_s, URL_HOST, &m, buff, &c); e |= nsurl__create_from_section(url_s, URL_PATH, &m, buff, &c); e |= nsurl__create_from_section(url_s, URL_QUERY, &m, buff, &c); e |= nsurl__create_from_section(url_s, URL_FRAGMENT, &m, buff, &c); /* Finished with buffer */ free(buff); if (e != NSERROR_OK) return NSERROR_NOMEM; /* Get the string length and find which parts of url are present */ nsurl__get_string_data(&c, NSURL_WITH_FRAGMENT, &length, &str_len, &str_flags); /* Create NetSurf URL object */ *url = malloc(sizeof(nsurl) + length + 1); /* Add 1 for \0 */ if (*url == NULL) return NSERROR_NOMEM; (*url)->components = c; (*url)->length = length; /* Fill out the url string */ nsurl_get_string(&c, (*url)->string, &str_len, str_flags); /* Give the URL a reference */ (*url)->count = 1; return NSERROR_OK; } /* exported interface, documented in nsurl.h */ nsurl *nsurl_ref(nsurl *url) { assert(url != NULL); url->count++; return url; } /* exported interface, documented in nsurl.h */ void nsurl_unref(nsurl *url) { assert(url != NULL); assert(url->count > 0); if (--url->count > 0) return; #ifdef NSURL_DEBUG nsurl__dump(url); #endif /* Release lwc strings */ if (url->components.scheme) lwc_string_unref(url->components.scheme); if (url->components.username) lwc_string_unref(url->components.username); if (url->components.password) lwc_string_unref(url->components.password); if (url->components.host) lwc_string_unref(url->components.host); if (url->components.port) lwc_string_unref(url->components.port); if (url->components.path) lwc_string_unref(url->components.path); if (url->components.query) lwc_string_unref(url->components.query); if (url->components.fragment) lwc_string_unref(url->components.fragment); /* Free the NetSurf URL */ free(url); } /* exported interface, documented in nsurl.h */ bool nsurl_compare(const nsurl *url1, const nsurl *url2, nsurl_component parts) { bool match = true; assert(url1 != NULL); assert(url2 != NULL); /* Compare URL components */ /* Path, host and query first, since they're most likely to differ */ if (parts & NSURL_PATH) { nsurl__component_compare(url1->components.path, url2->components.path, &match); if (match == false) return false; } if (parts & NSURL_HOST) { nsurl__component_compare(url1->components.host, url2->components.host, &match); if (match == false) return false; } if (parts & NSURL_QUERY) { nsurl__component_compare(url1->components.query, url2->components.query, &match); if (match == false) return false; } if (parts & NSURL_SCHEME) { nsurl__component_compare(url1->components.scheme, url2->components.scheme, &match); if (match == false) return false; } if (parts & NSURL_USERNAME) { nsurl__component_compare(url1->components.username, url2->components.username, &match); if (match == false) return false; } if (parts & NSURL_PASSWORD) { nsurl__component_compare(url1->components.password, url2->components.password, &match); if (match == false) return false; } if (parts & NSURL_PORT) { nsurl__component_compare(url1->components.port, url2->components.port, &match); if (match == false) return false; } if (parts & NSURL_FRAGMENT) { nsurl__component_compare(url1->components.fragment, url2->components.fragment, &match); if (match == false) return false; } return true; } /* exported interface, documented in nsurl.h */ nserror nsurl_get(const nsurl *url, nsurl_component parts, char **url_s, size_t *url_l) { struct nsurl_component_lengths str_len = { 0, 0, 0, 0, 0, 0, 0, 0 }; enum nsurl_string_flags str_flags = 0; /* Get the string length and find which parts of url need copied */ nsurl__get_string_data(&(url->components), parts, url_l, &str_len, &str_flags); if (*url_l == 0) { return NSERROR_BAD_URL; } /* Allocate memory for url string */ *url_s = malloc(*url_l + 1); /* adding 1 for '\0' */ if (*url_s == NULL) { return NSERROR_NOMEM; } /* Copy the required parts into the url string */ nsurl_get_string(&(url->components), *url_s, &str_len, str_flags); return NSERROR_OK; } /* exported interface, documented in nsurl.h */ lwc_string *nsurl_get_component(const nsurl *url, nsurl_component part) { assert(url != NULL); switch (part) { case NSURL_SCHEME: return (url->components.scheme != NULL) ? lwc_string_ref(url->components.scheme) : NULL; case NSURL_USERNAME: return (url->components.username != NULL) ? lwc_string_ref(url->components.username) : NULL; case NSURL_PASSWORD: return (url->components.password != NULL) ? lwc_string_ref(url->components.password) : NULL; case NSURL_HOST: return (url->components.host != NULL) ? lwc_string_ref(url->components.host) : NULL; case NSURL_PORT: return (url->components.port != NULL) ? lwc_string_ref(url->components.port) : NULL; case NSURL_PATH: return (url->components.path != NULL) ? lwc_string_ref(url->components.path) : NULL; case NSURL_QUERY: return (url->components.query != NULL) ? lwc_string_ref(url->components.query) : NULL; case NSURL_FRAGMENT: return (url->components.fragment != NULL) ? lwc_string_ref(url->components.fragment) : NULL; default: LOG(("Unsupported value passed to part param.")); assert(0); } return NULL; } /* exported interface, documented in nsurl.h */ bool nsurl_has_component(const nsurl *url, nsurl_component part) { assert(url != NULL); switch (part) { case NSURL_SCHEME: if (url->components.scheme != NULL) return true; else return false; case NSURL_CREDENTIALS: /* Only username required for credentials section */ /* Fall through */ case NSURL_USERNAME: if (url->components.username != NULL) return true; else return false; case NSURL_PASSWORD: if (url->components.password != NULL) return true; else return false; case NSURL_HOST: if (url->components.host != NULL) return true; else return false; case NSURL_PORT: if (url->components.port != NULL) return true; else return false; case NSURL_PATH: if (url->components.path != NULL) return true; else return false; case NSURL_QUERY: if (url->components.query != NULL) return true; else return false; case NSURL_FRAGMENT: if (url->components.fragment != NULL) return true; else return false; default: LOG(("Unsupported value passed to part param.")); assert(0); } return false; } /* exported interface, documented in nsurl.h */ const char *nsurl_access(const nsurl *url) { assert(url != NULL); return url->string; } /* exported interface, documented in nsurl.h */ const char *nsurl_access_leaf(const nsurl *url) { size_t path_len; const char *path; const char *leaf; if (url->components.path == NULL) return ""; path = lwc_string_data(url->components.path); path_len = lwc_string_length(url->components.path); if (path_len == 0) return ""; if (path_len == 1 && *path == '/') return "/"; leaf = path + path_len; do { leaf--; } while ((leaf != path) && (*leaf != '/')); if (*leaf == '/') leaf++; return leaf; } /* exported interface, documented in nsurl.h */ size_t nsurl_length(const nsurl *url) { assert(url != NULL); return url->length; } /* exported interface, documented in nsurl.h */ nserror nsurl_join(const nsurl *base, const char *rel, nsurl **joined) { struct url_markers m; struct nsurl_components c; size_t length; char *buff; char *buff_pos; char *buff_start; struct nsurl_component_lengths str_len = { 0, 0, 0, 0, 0, 0, 0, 0 }; enum nsurl_string_flags str_flags = 0; nserror error = 0; enum { NSURL_F_REL = 0, NSURL_F_BASE_SCHEME = (1 << 0), NSURL_F_BASE_AUTHORITY = (1 << 1), NSURL_F_BASE_PATH = (1 << 2), NSURL_F_MERGED_PATH = (1 << 3), NSURL_F_BASE_QUERY = (1 << 4) } joined_parts; assert(base != NULL); assert(rel != NULL); /* Peg out the URL sections */ nsurl__get_string_markers(rel, &m, true); /* Get the length of the longest section */ length = nsurl__get_longest_section(&m); /* Initially assume that the joined URL can be formed entierly from * the relative URL. */ joined_parts = NSURL_F_REL; /* Update joined_compnents to indicate any required parts from the * base URL. */ if (m.scheme_end - m.start <= 0) { /* The relative url has no scheme. * Use base URL's scheme. */ joined_parts |= NSURL_F_BASE_SCHEME; if (m.path - m.authority <= 0) { /* The relative URL has no authority. * Use base URL's authority. */ joined_parts |= NSURL_F_BASE_AUTHORITY; if (m.query - m.path <= 0) { /* The relative URL has no path. * Use base URL's path. */ joined_parts |= NSURL_F_BASE_PATH; if (m.fragment - m.query <= 0) { /* The relative URL has no query. * Use base URL's query. */ joined_parts |= NSURL_F_BASE_QUERY; } } else if (*(rel + m.path) != '/') { /* Relative URL has relative path */ joined_parts |= NSURL_F_MERGED_PATH; } } } /* Allocate enough memory to url escape the longest section, plus * space for path merging (if required). */ if (joined_parts & NSURL_F_MERGED_PATH) { /* Need to merge paths */ length += (base->components.path != NULL) ? lwc_string_length(base->components.path) : 0; } length *= 4; /* Plus space for removing dots from path */ length += (m.query - m.path) + ((base->components.path != NULL) ? lwc_string_length(base->components.path) : 0); buff = malloc(length + 5); if (buff == NULL) return NSERROR_NOMEM; buff_pos = buff; /* Form joined URL from base or rel components, as appropriate */ if (joined_parts & NSURL_F_BASE_SCHEME) { c.scheme_type = base->components.scheme_type; c.scheme = nsurl__component_copy(base->components.scheme); } else { c.scheme_type = m.scheme_type; error |= nsurl__create_from_section(rel, URL_SCHEME, &m, buff, &c); } if (joined_parts & NSURL_F_BASE_AUTHORITY) { c.username = nsurl__component_copy(base->components.username); c.password = nsurl__component_copy(base->components.password); c.host = nsurl__component_copy(base->components.host); c.port = nsurl__component_copy(base->components.port); } else { error |= nsurl__create_from_section(rel, URL_CREDENTIALS, &m, buff, &c); error |= nsurl__create_from_section(rel, URL_HOST, &m, buff, &c); } if (joined_parts & NSURL_F_BASE_PATH) { c.path = nsurl__component_copy(base->components.path); } else if (joined_parts & NSURL_F_MERGED_PATH) { struct url_markers m_path; size_t new_length; if (base->components.host != NULL && base->components.path == NULL) { /* Append relative path to "/". */ *(buff_pos++) = '/'; memcpy(buff_pos, rel + m.path, m.query - m.path); buff_pos += m.query - m.path; } else { /* Append relative path to all but last segment of * base path. */ size_t path_end = lwc_string_length( base->components.path); const char *path = lwc_string_data( base->components.path); while (*(path + path_end) != '/' && path_end != 0) { path_end--; } if (*(path + path_end) == '/') path_end++; /* Copy the base part */ memcpy(buff_pos, path, path_end); buff_pos += path_end; /* Copy the relative part */ memcpy(buff_pos, rel + m.path, m.query - m.path); buff_pos += m.query - m.path; } /* add termination to string */ *buff_pos++ = '\0'; new_length = nsurl__remove_dot_segments(buff, buff_pos); m_path.path = 0; m_path.query = new_length; buff_start = buff_pos + new_length; error |= nsurl__create_from_section(buff_pos, URL_PATH, &m_path, buff_start, &c); } else { struct url_markers m_path; size_t new_length; memcpy(buff_pos, rel + m.path, m.query - m.path); buff_pos += m.query - m.path; *(buff_pos++) = '\0'; new_length = nsurl__remove_dot_segments(buff, buff_pos); m_path.path = 0; m_path.query = new_length; buff_start = buff_pos + new_length; error |= nsurl__create_from_section(buff_pos, URL_PATH, &m_path, buff_start, &c); } if (joined_parts & NSURL_F_BASE_QUERY) c.query = nsurl__component_copy(base->components.query); else error |= nsurl__create_from_section(rel, URL_QUERY, &m, buff, &c); error |= nsurl__create_from_section(rel, URL_FRAGMENT, &m, buff, &c); /* Free temporary buffer */ free(buff); if (error != NSERROR_OK) return NSERROR_NOMEM; /* Get the string length and find which parts of url are present */ nsurl__get_string_data(&c, NSURL_WITH_FRAGMENT, &length, &str_len, &str_flags); /* Create NetSurf URL object */ *joined = malloc(sizeof(nsurl) + length + 1); /* Add 1 for \0 */ if (*joined == NULL) return NSERROR_NOMEM; (*joined)->components = c; (*joined)->length = length; /* Fill out the url string */ nsurl_get_string(&c, (*joined)->string, &str_len, str_flags); /* Give the URL a reference */ (*joined)->count = 1; return NSERROR_OK; } /* exported interface, documented in nsurl.h */ nserror nsurl_defragment(const nsurl *url, nsurl **no_frag) { size_t length; char *pos; /* Find the change in length from url to new_url */ length = url->length; if (url->components.fragment != NULL) { length -= 1 + lwc_string_length(url->components.fragment); } /* Create NetSurf URL object */ *no_frag = malloc(sizeof(nsurl) + length + 1); /* Add 1 for \0 */ if (*no_frag == NULL) { return NSERROR_NOMEM; } /* Copy components */ (*no_frag)->components.scheme = nsurl__component_copy(url->components.scheme); (*no_frag)->components.username = nsurl__component_copy(url->components.username); (*no_frag)->components.password = nsurl__component_copy(url->components.password); (*no_frag)->components.host = nsurl__component_copy(url->components.host); (*no_frag)->components.port = nsurl__component_copy(url->components.port); (*no_frag)->components.path = nsurl__component_copy(url->components.path); (*no_frag)->components.query = nsurl__component_copy(url->components.query); (*no_frag)->components.fragment = NULL; (*no_frag)->components.scheme_type = url->components.scheme_type; (*no_frag)->length = length; /* Fill out the url string */ pos = (*no_frag)->string; memcpy(pos, url->string, length); pos += length; *pos = '\0'; /* Give the URL a reference */ (*no_frag)->count = 1; return NSERROR_OK; } /* exported interface, documented in nsurl.h */ nserror nsurl_refragment(const nsurl *url, lwc_string *frag, nsurl **new_url) { int frag_len; int base_len; char *pos; size_t len; assert(url != NULL); assert(frag != NULL); /* Find the change in length from url to new_url */ base_len = url->length; if (url->components.fragment != NULL) { base_len -= 1 + lwc_string_length(url->components.fragment); } frag_len = lwc_string_length(frag); /* Set new_url's length */ len = base_len + 1 /* # */ + frag_len; /* Create NetSurf URL object */ *new_url = malloc(sizeof(nsurl) + len + 1); /* Add 1 for \0 */ if (*new_url == NULL) { return NSERROR_NOMEM; } (*new_url)->length = len; /* Set string */ pos = (*new_url)->string; memcpy(pos, url->string, base_len); pos += base_len; *pos = '#'; memcpy(++pos, lwc_string_data(frag), frag_len); pos += frag_len; *pos = '\0'; /* Copy components */ (*new_url)->components.scheme = nsurl__component_copy(url->components.scheme); (*new_url)->components.username = nsurl__component_copy(url->components.username); (*new_url)->components.password = nsurl__component_copy(url->components.password); (*new_url)->components.host = nsurl__component_copy(url->components.host); (*new_url)->components.port = nsurl__component_copy(url->components.port); (*new_url)->components.path = nsurl__component_copy(url->components.path); (*new_url)->components.query = nsurl__component_copy(url->components.query); (*new_url)->components.fragment = lwc_string_ref(frag); (*new_url)->components.scheme_type = url->components.scheme_type; /* Give the URL a reference */ (*new_url)->count = 1; return NSERROR_OK; } /* exported interface, documented in nsurl.h */ nserror nsurl_replace_query(const nsurl *url, const char *query, nsurl **new_url) { int query_len; int base_len; char *pos; size_t len; lwc_string *lwc_query; assert(url != NULL); assert(query != NULL); assert(query[0] == '?'); /* Get the length of the new query */ query_len = strlen(query); /* Find the change in length from url to new_url */ base_len = url->length; if (url->components.query != NULL) { base_len -= lwc_string_length(url->components.query); } if (url->components.fragment != NULL) { base_len -= 1 + lwc_string_length(url->components.fragment); } /* Set new_url's length */ len = base_len + query_len; /* Create NetSurf URL object */ *new_url = malloc(sizeof(nsurl) + len + 1); /* Add 1 for \0 */ if (*new_url == NULL) { return NSERROR_NOMEM; } if (lwc_intern_string(query, query_len, &lwc_query) != lwc_error_ok) { free(*new_url); return NSERROR_NOMEM; } (*new_url)->length = len; /* Set string */ pos = (*new_url)->string; memcpy(pos, url->string, base_len); pos += base_len; memcpy(pos, query, query_len); pos += query_len; if (url->components.fragment != NULL) { const char *frag = lwc_string_data(url->components.fragment); size_t frag_len = lwc_string_length(url->components.fragment); *pos = '#'; memcpy(++pos, frag, frag_len); pos += frag_len; } *pos = '\0'; /* Copy components */ (*new_url)->components.scheme = nsurl__component_copy(url->components.scheme); (*new_url)->components.username = nsurl__component_copy(url->components.username); (*new_url)->components.password = nsurl__component_copy(url->components.password); (*new_url)->components.host = nsurl__component_copy(url->components.host); (*new_url)->components.port = nsurl__component_copy(url->components.port); (*new_url)->components.path = nsurl__component_copy(url->components.path); (*new_url)->components.query = lwc_query; (*new_url)->components.fragment = nsurl__component_copy(url->components.fragment); (*new_url)->components.scheme_type = url->components.scheme_type; /* Give the URL a reference */ (*new_url)->count = 1; return NSERROR_OK; } /* exported interface, documented in nsurl.h */ nserror nsurl_parent(const nsurl *url, nsurl **new_url) { lwc_string *lwc_path; size_t old_path_len, new_path_len; size_t len; const char* path = NULL; char *pos; assert(url != NULL); old_path_len = (url->components.path == NULL) ? 0 : lwc_string_length(url->components.path); /* Find new path length */ if (old_path_len == 0) { new_path_len = old_path_len; } else { path = lwc_string_data(url->components.path); new_path_len = old_path_len; if (old_path_len > 1) { /* Skip over any trailing / */ if (path[new_path_len - 1] == '/') new_path_len--; /* Work back to next / */ while (new_path_len > 0 && path[new_path_len - 1] != '/') new_path_len--; } } /* Find the length of new_url */ len = url->length; if (url->components.query != NULL) { len -= lwc_string_length(url->components.query); } if (url->components.fragment != NULL) { len -= 1; /* # */ len -= lwc_string_length(url->components.fragment); } len -= old_path_len - new_path_len; /* Create NetSurf URL object */ *new_url = malloc(sizeof(nsurl) + len + 1); /* Add 1 for \0 */ if (*new_url == NULL) { return NSERROR_NOMEM; } /* Make new path */ if (old_path_len == 0) { lwc_path = NULL; } else if (old_path_len == new_path_len) { lwc_path = lwc_string_ref(url->components.path); } else { if (lwc_intern_string(path, old_path_len - new_path_len, &lwc_path) != lwc_error_ok) { free(*new_url); return NSERROR_NOMEM; } } (*new_url)->length = len; /* Set string */ pos = (*new_url)->string; memcpy(pos, url->string, len); pos += len; *pos = '\0'; /* Copy components */ (*new_url)->components.scheme = nsurl__component_copy(url->components.scheme); (*new_url)->components.username = nsurl__component_copy(url->components.username); (*new_url)->components.password = nsurl__component_copy(url->components.password); (*new_url)->components.host = nsurl__component_copy(url->components.host); (*new_url)->components.port = nsurl__component_copy(url->components.port); (*new_url)->components.path = lwc_path; (*new_url)->components.query = NULL; (*new_url)->components.fragment = NULL; (*new_url)->components.scheme_type = url->components.scheme_type; /* Give the URL a reference */ (*new_url)->count = 1; return NSERROR_OK; }