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-rw-r--r--utils/http.c423
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diff --git a/utils/http.c b/utils/http.c
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--- a/utils/http.c
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-/*
- * Copyright 2010 John-Mark Bell <jmb@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
- * HTTP header parsing functions
- */
-
-#include <inttypes.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "utils/http.h"
-
-/**
- * Representation of an HTTP parameter
- */
-struct http_parameter {
- struct http_parameter *next; /**< Next parameter in list, or NULL */
-
- char *name; /**< Parameter name */
- char *value; /**< Parameter value */
-};
-
-/**
- * Determine if a character is valid for an HTTP token
- *
- * \param c Character to consider
- * \return True if character is valid, false otherwise
- */
-static bool http_is_token_char(uint8_t c)
-{
- /* [ 32 - 126 ] except ()<>@,;:\"/[]?={} SP HT */
-
- if (c <= ' ' || 126 < c)
- return false;
-
- return (strchr("()<>@,;:\\\"/[]?={}", c) == NULL);
-}
-
-/**
- * Parse an HTTP token
- *
- * \param input Pointer to current input byte. Updated on exit.
- * \param value Pointer to location to receive on-heap token value.
- * \return NSERROR_OK on success,
- * NSERROR_NOMEM on memory exhaustion
- *
- * The returned value is owned by the caller
- */
-static nserror http_parse_token(const char **input, char **value)
-{
- const uint8_t *start = (const uint8_t *) *input;
- const uint8_t *end;
- char *token;
-
- end = start;
- while (http_is_token_char(*end))
- end++;
-
- token = malloc(end - start + 1);
- if (token == NULL)
- return NSERROR_NOMEM;
-
- memcpy(token, start, end - start);
- token[end - start] = '\0';
-
- *value = token;
- *input = (const char *) end;
-
- return NSERROR_OK;
-}
-
-/**
- * Parse an HTTP quoted-string
- *
- * \param input Pointer to current input byte. Updated on exit.
- * \param value Pointer to location to receive on-heap string value.
- * \return NSERROR_OK on success,
- * NSERROR_NOMEM on memory exhaustion
- *
- * The returned value is owned by the caller
- */
-static nserror http_parse_quoted_string(const char **input, char **value)
-{
- const uint8_t *start = (const uint8_t *) *input;
- const uint8_t *end;
- uint8_t c;
- char *string_value;
-
- /* <"> *( qdtext | quoted-pair ) <">
- * qdtext = any TEXT except <">
- * quoted-pair = "\" CHAR
- * TEXT = [ HT, CR, LF, 32-126, 128-255 ]
- * CHAR = [ 0 - 127 ]
- *
- * \todo TEXT may contain non 8859-1 chars encoded per RFC 2047
- * \todo Support quoted-pairs
- */
-
- if (*start == '"') {
- end = start = start + 1;
-
- c = *end;
- while (c == '\t' || c == '\r' || c == '\n' ||
- c == ' ' || c == '!' ||
- ('#' <= c && c <= 126) || c > 127) {
- end++;
- c = *end;
- }
-
- if (*end != '"') {
- start--;
- end = start;
- }
- } else {
- end = start;
- }
-
- string_value = malloc(end - start + 1);
- if (string_value == NULL)
- return NSERROR_NOMEM;
-
- memcpy(string_value, start, end - start);
- string_value[end - start] = '\0';
-
- *value = string_value;
-
- if (end != start)
- *input = (const char *) end + 1;
-
- return NSERROR_OK;
-}
-
-/**
- * Parse an HTTP parameter
- *
- * \param input Pointer to current input byte. Updated on exit.
- * \param parameter Pointer to location to receive on-heap parameter.
- * \return NSERROR_OK on success,
- * NSERROR_NOMEM on memory exhaustion
- *
- * The returned parameter is owned by the caller.
- */
-static nserror http_parse_parameter(const char **input,
- http_parameter **parameter)
-{
- const char *pos = *input;
- char *name;
- char *value;
- http_parameter *param;
- nserror error;
-
- /* token "=" ( token | quoted-string ) */
-
- error = http_parse_token(&pos, &name);
- if (error != NSERROR_OK)
- return error;
-
- while (*pos == ' ' || *pos == '\t')
- pos++;
-
- if (*pos != '=') {
- value = strdup("");
- if (value == NULL) {
- free(name);
- return NSERROR_NOMEM;
- }
- } else {
- pos++;
-
- while (*pos == ' ' || *pos == '\t')
- pos++;
-
- if (*pos == '"')
- error = http_parse_quoted_string(&pos, &value);
- else
- error = http_parse_token(&pos, &value);
-
- if (error != NSERROR_OK) {
- free(name);
- return error;
- }
- }
-
- param = malloc(sizeof(*param));
- if (param == NULL) {
- free(value);
- free(name);
- return NSERROR_NOMEM;
- }
-
- param->next = NULL;
- param->name = name;
- param->value = value;
-
- *parameter = param;
- *input = pos;
-
- return NSERROR_OK;
-}
-
-/**
- * Parse an HTTP parameter list
- *
- * \param input Pointer to current input byte. Updated on exit.
- * \param parameters Pointer to location to receive on-heap parameter list.
- * \return NSERROR_OK on success,
- * NSERROR_NOMEM on memory exhaustion
- *
- * The returned parameter list is owned by the caller
- */
-static nserror http_parse_parameter_list(const char **input,
- http_parameter **parameters)
-{
- const char *pos = *input;
- http_parameter *param;
- http_parameter *list = NULL;
- nserror error;
-
- /* 1*( ";" parameter ) */
-
- while (*pos == ';') {
- pos++;
-
- while (*pos == ' ' || *pos == '\t')
- pos++;
-
- error = http_parse_parameter(&pos, &param);
- if (error != NSERROR_OK) {
- while (list != NULL) {
- param = list;
-
- list = param->next;
-
- free(param->name);
- free(param->value);
- free(param);
- }
- return error;
- }
-
- if (list != NULL)
- param->next = list;
-
- list = param;
-
- while (*pos == ' ' || *pos == '\t')
- pos++;
- }
-
- *parameters = list;
- *input = pos;
-
- return NSERROR_OK;
-}
-
-/* See http.h for documentation */
-nserror http_parse_content_type(const char *header_value, char **media_type,
- http_parameter **parameters)
-{
- const char *pos = header_value;
- char *type;
- char *subtype = NULL;
- http_parameter *params = NULL;
- char *mime;
- size_t mime_len;
- nserror error;
-
- /* type "/" subtype *( ";" parameter ) */
-
- while (*pos == ' ' || *pos == '\t')
- pos++;
-
- error = http_parse_token(&pos, &type);
- if (error != NSERROR_OK)
- return error;
-
- while (*pos == ' ' || *pos == '\t')
- pos++;
-
- if (*pos == '/') {
- pos++;
-
- while (*pos == ' ' || *pos == '\t')
- pos++;
-
- error = http_parse_token(&pos, &subtype);
- if (error != NSERROR_OK) {
- free(type);
- return error;
- }
-
- while (*pos == ' ' || *pos == '\t')
- pos++;
-
- if (*pos == ';') {
- error = http_parse_parameter_list(&pos, &params);
- if (error != NSERROR_OK) {
- free(subtype);
- free(type);
- return error;
- }
- }
- }
-
- /* <type> + <subtype> + '/' */
- mime_len = strlen(type) + (subtype != NULL ? strlen(subtype) : 0) + 1;
-
- mime = malloc(mime_len + 1);
- if (mime == NULL) {
- http_parameter_list_destroy(params);
- free(subtype);
- free(type);
- return NSERROR_OK;
- }
-
- sprintf(mime, "%s/%s", type, subtype != NULL ? subtype : "");
-
- free(subtype);
- free(type);
-
- *media_type = mime;
- *parameters = params;
-
- return NSERROR_OK;
-}
-
-/* See http.h for documentation */
-nserror http_parse_content_disposition(const char *header_value,
- char **disposition_type, http_parameter **parameters)
-{
- const char *pos = header_value;
- char *type;
- http_parameter *params = NULL;
- nserror error;
-
- /* disposition-type *( ";" parameter ) */
-
- while (*pos == ' ' || *pos == '\t')
- pos++;
-
- error = http_parse_token(&pos, &type);
- if (error != NSERROR_OK)
- return error;
-
- while (*pos == ' ' || *pos == '\t')
- pos++;
-
- if (*pos == ';') {
- error = http_parse_parameter_list(&pos, &params);
- if (error != NSERROR_OK) {
- free(type);
- return error;
- }
- }
-
- *disposition_type = type;
- *parameters = params;
-
- return NSERROR_OK;
-
-}
-
-/* See http.h for documentation */
-nserror http_parameter_list_find_item(const http_parameter *list,
- const char *name, const char **value)
-{
- while (list != NULL && strcasecmp(name, list->name) != 0)
- list = list->next;
-
- if (list == NULL)
- return NSERROR_NOT_FOUND;
-
- *value = list->value;
-
- return NSERROR_OK;
-}
-
-/* See http.h for documentation */
-const http_parameter *http_parameter_list_iterate(const http_parameter *cur,
- const char **name, const char **value)
-{
- if (cur == NULL)
- return NULL;
-
- *name = cur->name;
- *value = cur->value;
-
- return cur->next;
-}
-
-/* See http.h for documentation */
-void http_parameter_list_destroy(http_parameter *list)
-{
- while (list != NULL) {
- http_parameter *victim = list;
-
- list = victim->next;
-
- free(victim->name);
- free(victim->value);
- free(victim);
- }
-}
-
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