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-rw-r--r--utils/nsurl/nsurl.c2500
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diff --git a/utils/nsurl/nsurl.c b/utils/nsurl/nsurl.c
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+/*
+ * Copyright 2011 Michael Drake <tlsa@netsurf-browser.org>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file
+ * NetSurf URL handling implementation.
+ *
+ * This is the common implementation of all URL handling within the
+ * browser. This implementation is based upon RFC3986 although this has
+ * been superceeded by https://url.spec.whatwg.org/ which is based on
+ * actual contemporary implementations.
+ *
+ * Care must be taken with character encodings within this module as
+ * the specifications work with specific ascii ranges and must not be
+ * affected by locale. Hence the c library character type functions
+ * are not used.
+ */
+
+#include <assert.h>
+#include <libwapcaplet/libwapcaplet.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+
+#include "utils/ascii.h"
+#include "utils/corestrings.h"
+#include "utils/errors.h"
+#include "utils/idna.h"
+#include "utils/log.h"
+#include "utils/nsurl.h"
+#include "utils/utils.h"
+
+/* Define to enable NSURL debugging */
+#undef NSURL_DEBUG
+
+/**
+ * nsurl scheme type
+ */
+enum scheme_type {
+ NSURL_SCHEME_OTHER,
+ NSURL_SCHEME_HTTP,
+ NSURL_SCHEME_HTTPS,
+ NSURL_SCHEME_FTP,
+ NSURL_SCHEME_MAILTO
+};
+
+/**
+ * nsurl components
+ *
+ * [scheme]://[username]:[password]@[host]:[port][path][?query]#[fragment]
+ *
+ * Note:
+ * "path" string includes preceding '/', if needed for the scheme
+ * "query" string always includes preceding '?'
+ *
+ * The other spanned punctuation is to be inserted when building URLs from
+ * 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
+ */
+struct nsurl {
+ struct nsurl_components components;
+
+ int count; /* Number of references to NetSurf URL object */
+ uint32_t hash; /* Hash value for nsurl identification */
+
+ 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; \
+ }
+
+/**
+ * Return a hex digit for the given numerical value.
+ *
+ * \param digit the value to get the hex digit for.
+ * \return character in range 0-9A-F
+ */
+inline static char digit2uppercase_hex(unsigned char digit) {
+ assert(digit < 16);
+ return "0123456789ABCDEF"[digit];
+}
+
+/**
+ * determine if a character is unreserved
+ *
+ * \param c character to classify.
+ * \return true if the character is unreserved else false.
+ */
+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];
+}
+
+/**
+ * determine if a character should be percent escaped.
+ *
+ * The ASCII codes which should not be percent escaped
+ *
+ * \param c character to classify.
+ * \return true if the character should not be escaped else false.
+ */
+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];
+}
+
+
+/**
+ * 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 (ascii_is_space(*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 (ascii_is_alpha(*pos)) {
+ pos++;
+
+ while (*pos != ':' && *pos != '\0') {
+ if (!ascii_is_alphanumerical(*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 (marker.scheme_type != NSURL_SCHEME_MAILTO &&
+ *pos == ':' && marker.colon_first ==
+ marker.authority) {
+ /* could be username:password or host:port
+ * separator */
+ marker.colon_first = pos - url_s;
+
+ } else if (marker.scheme_type != NSURL_SCHEME_MAILTO &&
+ *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 && ascii_is_space(*pos)) {
+ trailing_whitespace = true;
+ while (pos >= url_s && ascii_is_space(*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;
+ }
+
+#ifdef NSURL_DEBUG
+ LOG("marker.start: %i", marker.start);
+ LOG("marker.scheme_end: %i", marker.scheme_end);
+ LOG("marker.authority: %i", marker.authority);
+
+ LOG("marker.colon_first: %i", marker.colon_first);
+ LOG("marker.at: %i", marker.at);
+ LOG("marker.colon_last: %i", marker.colon_last);
+
+ LOG("marker.path: %i", marker.path);
+ LOG("marker.query: %i", marker.query);
+ LOG("marker.fragment: %i", marker.fragment);
+
+ LOG("marker.end: %i", marker.end);
+#endif
+
+ /* 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 (ascii_is_digit(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 (ascii_is_digit(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)
+{
+ nserror ret;
+ int ascii_offset;
+ int start = 0;
+ int end = 0;
+ const char *pos;
+ const char *pos_url_s;
+ char *norm_start = pos_norm;
+ char *host;
+ size_t copy_len;
+ size_t length;
+ size_t host_len;
+ 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;
+ }
+
+ if (end < start)
+ end = start;
+
+ 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 ((section != URL_SCHEME && section != URL_HOST) &&
+ (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 ((section != URL_SCHEME && section != URL_HOST) &&
+ (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) &&
+ ascii_is_alpha_upper(*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++) = ascii_to_lower(*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 */
+ url->scheme = lwc_string_ref(corestring_lwc_http);
+ } 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 (!ascii_is_digit(*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)) {
+ /* 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 */
+ /* Encode host according to IDNA2008 */
+ ret = idna_encode(norm_start, length, &host, &host_len);
+ if (ret == NSERROR_OK) {
+ /* valid idna encoding */
+ if (lwc_intern_string(host, host_len,
+ &url->host) != lwc_error_ok) {
+ return NSERROR_NOMEM;
+ }
+ free(host);
+ } else {
+ /* fall back to straight interning */
+ 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';
+}
+
+
+/**
+ * Calculate hash value
+ *
+ * \param url NetSurf URL object to set hash value for
+ */
+static void nsurl_calc_hash(nsurl *url)
+{
+ uint32_t hash = 0;
+
+ if (url->components.scheme)
+ hash ^= lwc_string_hash_value(url->components.scheme);
+
+ if (url->components.username)
+ hash ^= lwc_string_hash_value(url->components.username);
+
+ if (url->components.password)
+ hash ^= lwc_string_hash_value(url->components.password);
+
+ if (url->components.host)
+ hash ^= lwc_string_hash_value(url->components.host);
+
+ if (url->components.port)
+ hash ^= lwc_string_hash_value(url->components.port);
+
+ if (url->components.path)
+ hash ^= lwc_string_hash_value(url->components.path);
+
+ if (url->components.query)
+ hash ^= lwc_string_hash_value(url->components.query);
+
+ url->hash = hash;
+}
+
+
+/**
+ * Destroy components
+ *
+ * \param c url components
+ */
+static void nsurl_destroy_components(struct nsurl_components *c)
+{
+ if (c->scheme)
+ lwc_string_unref(c->scheme);
+
+ if (c->username)
+ lwc_string_unref(c->username);
+
+ if (c->password)
+ lwc_string_unref(c->password);
+
+ if (c->host)
+ lwc_string_unref(c->host);
+
+ if (c->port)
+ lwc_string_unref(c->port);
+
+ if (c->path)
+ lwc_string_unref(c->path);
+
+ if (c->query)
+ lwc_string_unref(c->query);
+
+ if (c->fragment)
+ lwc_string_unref(c->fragment);
+}
+
+
+#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;
+ bool match;
+
+ 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) {
+ nsurl_destroy_components(&c);
+ return NSERROR_NOMEM;
+ }
+
+ /* Validate URL */
+ if ((lwc_string_isequal(c.scheme, corestring_lwc_http,
+ &match) == lwc_error_ok && match == true) ||
+ (lwc_string_isequal(c.scheme, corestring_lwc_https,
+ &match) == lwc_error_ok && match == true)) {
+ /* http, https must have host */
+ if (c.host == NULL) {
+ nsurl_destroy_components(&c);
+ return NSERROR_BAD_URL;
+ }
+ }
+
+ /* 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) {
+ nsurl_destroy_components(&c);
+ return NSERROR_NOMEM;
+ }
+
+ (*url)->components = c;
+ (*url)->length = length;
+
+ /* Fill out the url string */
+ nsurl_get_string(&c, (*url)->string, &str_len, str_flags);
+
+ /* Get the nsurl's hash */
+ nsurl_calc_hash(*url);
+
+ /* 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 */
+ nsurl_destroy_components(&url->components);
+
+ /* 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;
+
+ assert(url != NULL);
+
+ /* 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 */
+nserror nsurl_get_utf8(const nsurl *url, char **url_s, size_t *url_l)
+{
+ nserror err;
+ lwc_string *host;
+ char *idna_host = NULL;
+ size_t idna_host_len;
+ char *scheme = NULL;
+ size_t scheme_len;
+ char *path = NULL;
+ size_t path_len;
+
+ assert(url != NULL);
+
+ if (url->components.host == NULL) {
+ return nsurl_get(url, NSURL_WITH_FRAGMENT, url_s, url_l);
+ }
+
+ host = url->components.host;
+ err = idna_decode(lwc_string_data(host), lwc_string_length(host),
+ &idna_host, &idna_host_len);
+ if (err != NSERROR_OK) {
+ goto cleanup;
+ }
+
+ err = nsurl_get(url,
+ NSURL_SCHEME | NSURL_CREDENTIALS,
+ &scheme, &scheme_len);
+ if (err != NSERROR_OK) {
+ goto cleanup;
+ }
+
+ err = nsurl_get(url,
+ NSURL_PORT | NSURL_PATH | NSURL_QUERY | NSURL_FRAGMENT,
+ &path, &path_len);
+ if (err != NSERROR_OK) {
+ goto cleanup;
+ }
+
+ *url_l = scheme_len + idna_host_len + path_len + 1; /* +1 for \0 */
+ *url_s = malloc(*url_l);
+
+ if (*url_s == NULL) {
+ err = NSERROR_NOMEM;
+ goto cleanup;
+ }
+
+ snprintf(*url_s, *url_l, "%s%s%s", scheme, idna_host, path);
+
+ err = NSERROR_OK;
+
+cleanup:
+ free(idna_host);
+ free(scheme);
+ free(path);
+
+ return err;
+}
+
+
+/* exported interface, documented in nsurl.h */
+const char *nsurl_access_leaf(const nsurl *url)
+{
+ size_t path_len;
+ const char *path;
+ const char *leaf;
+
+ assert(url != NULL);
+
+ 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 */
+uint32_t nsurl_hash(const nsurl *url)
+{
+ assert(url != NULL);
+
+ return url->hash;
+}
+
+
+/* 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);
+
+#ifdef NSURL_DEBUG
+ LOG("base: \"%s\", rel: \"%s\"", nsurl_access(base), rel);
+#endif
+
+ /* 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 (error != NSERROR_OK) {
+ free(buff);
+ return error;
+ }
+ }
+
+ 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);
+ if (error == NSERROR_OK) {
+ error = nsurl__create_from_section(rel, URL_HOST, &m,
+ buff, &c);
+ }
+ if (error != NSERROR_OK) {
+ free(buff);
+ return error;
+ }
+ }
+
+ 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);
+ if (error != NSERROR_OK) {
+ free(buff);
+ return error;
+ }
+
+ } 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 (error != NSERROR_OK) {
+ free(buff);
+ return error;
+ }
+ }
+
+ 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);
+ if (error != NSERROR_OK) {
+ free(buff);
+ return error;
+ }
+ }
+
+ error = nsurl__create_from_section(rel, URL_FRAGMENT, &m, buff, &c);
+
+ /* Free temporary buffer */
+ free(buff);
+
+ if (error != NSERROR_OK) {
+ return error;
+ }
+
+ /* 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);
+
+ /* Get the nsurl's hash */
+ nsurl_calc_hash(*joined);
+
+ /* 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;
+
+ assert(url != NULL);
+
+ /* check for source url having no fragment already */
+ if (url->components.fragment == NULL) {
+ *no_frag = (nsurl *)url;
+
+ (*no_frag)->count++;
+
+ return NSERROR_OK;
+ }
+
+ /* 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';
+
+ /* Get the nsurl's hash */
+ nsurl_calc_hash(*no_frag);
+
+ /* 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;
+
+ /* Get the nsurl's hash */
+ nsurl_calc_hash(*new_url);
+
+ /* 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; /* Length of new query string, including '?' */
+ int frag_len = 0; /* Length of fragment, including '#' */
+ int base_len; /* Length of URL up to start of query */
+ 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) {
+ frag_len = 1 + lwc_string_length(url->components.fragment);
+ base_len -= frag_len;
+ }
+
+ /* Set new_url's length */
+ len = base_len + query_len + frag_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);
+ *pos = '#';
+ memcpy(++pos, frag, frag_len - 1);
+ pos += frag_len - 1;
+ }
+ *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;
+
+ /* Get the nsurl's hash */
+ nsurl_calc_hash(*new_url);
+
+ /* Give the URL a reference */
+ (*new_url)->count = 1;
+
+ return NSERROR_OK;
+}
+
+
+/* exported interface documented in utils/nsurl.h */
+nserror nsurl_nice(const nsurl *url, char **result, bool remove_extensions)
+{
+ const char *data;
+ size_t len;
+ size_t pos;
+ bool match;
+ char *name;
+
+ assert(url != NULL);
+
+ *result = 0;
+
+ /* extract the last component of the path, if possible */
+ if ((url->components.path != NULL) &&
+ (lwc_string_length(url->components.path) != 0) &&
+ (lwc_string_isequal(url->components.path,
+ corestring_lwc_slash_, &match) == lwc_error_ok) &&
+ (match == false)) {
+ bool first = true;
+ bool keep_looking;
+
+ /* Get hold of the string data we're examining */
+ data = lwc_string_data(url->components.path);
+ len = lwc_string_length(url->components.path);
+ pos = len;
+
+ do {
+ keep_looking = false;
+ pos--;
+
+ /* Find last '/' with stuff after it */
+ while (pos != 0) {
+ if (data[pos] == '/' && pos < len - 1) {
+ break;
+ }
+ pos--;
+ }
+
+ if (pos == 0) {
+ break;
+ }
+
+ if (first) {
+ if (strncasecmp("/default.", data + pos,
+ SLEN("/default.")) == 0) {
+ keep_looking = true;
+
+ } else if (strncasecmp("/index.",
+ data + pos,
+ 6) == 0) {
+ keep_looking = true;
+
+ }
+ first = false;
+ }
+
+ } while (keep_looking);
+
+ if (data[pos] == '/')
+ pos++;
+
+ if (strncasecmp("default.", data + pos, 8) != 0 &&
+ strncasecmp("index.", data + pos, 6) != 0) {
+ size_t end = pos;
+ while (data[end] != '\0' && data[end] != '/') {
+ end++;
+ }
+ if (end - pos != 0) {
+ name = malloc(end - pos + 1);
+ if (name == NULL) {
+ return NSERROR_NOMEM;
+ }
+ memcpy(name, data + pos, end - pos);
+ name[end - pos] = '\0';
+ if (remove_extensions) {
+ /* strip any extenstion */
+ char *dot = strchr(name, '.');
+ if (dot && dot != name) {
+ *dot = '\0';
+ }
+ }
+ *result = name;
+ return NSERROR_OK;
+ }
+ }
+ }
+
+ if (url->components.host != NULL) {
+ name = strdup(lwc_string_data(url->components.host));
+
+ for (pos = 0; name[pos] != '\0'; pos++) {
+ if (name[pos] == '.') {
+ name[pos] = '_';
+ }
+ }
+
+ *result = name;
+ return NSERROR_OK;
+ }
+
+ return NSERROR_NOT_FOUND;
+}
+
+
+/* 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;
+
+ /* Get the nsurl's hash */
+ nsurl_calc_hash(*new_url);
+
+ /* Give the URL a reference */
+ (*new_url)->count = 1;
+
+ return NSERROR_OK;
+}
+