Pfp Cybersecurity (Aka Power Fingerprinting, Inc.) / Mbed OS pfp-emon-nxp

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Dependencies:   FXAS21002 FXOS8700Q

simple-mbed-cloud-client/mbed-cloud-client/mbed-client/source/uriqueryparser.c@0:977e87915078, 2019-08-28 (annotated)

Committer:
vithyat
Date:
Wed Aug 28 19:24:56 2019 +0000
Revision:
0:977e87915078
init

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vithyat 0:977e87915078 1 /*
vithyat 0:977e87915078 2 * Copyright (c) 2018 ARM Limited. All rights reserved.
vithyat 0:977e87915078 3 * SPDX-License-Identifier: Apache-2.0
vithyat 0:977e87915078 4 * Licensed under the Apache License, Version 2.0 (the License); you may
vithyat 0:977e87915078 5 * not use this file except in compliance with the License.
vithyat 0:977e87915078 6 * You may obtain a copy of the License at
vithyat 0:977e87915078 7 *
vithyat 0:977e87915078 8 * http://www.apache.org/licenses/LICENSE-2.0
vithyat 0:977e87915078 9 *
vithyat 0:977e87915078 10 * Unless required by applicable law or agreed to in writing, software
vithyat 0:977e87915078 11 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
vithyat 0:977e87915078 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
vithyat 0:977e87915078 13 * See the License for the specific language governing permissions and
vithyat 0:977e87915078 14 * limitations under the License.
vithyat 0:977e87915078 15 */
vithyat 0:977e87915078 16
vithyat 0:977e87915078 17 #include <stdlib.h>
vithyat 0:977e87915078 18 #include <string.h>
vithyat 0:977e87915078 19 #include "assert.h"
vithyat 0:977e87915078 20 #include "mbed-client/uriqueryparser.h"
vithyat 0:977e87915078 21
vithyat 0:977e87915078 22 // Use int return value instead of ssize_t since we don't have it for all platforms
vithyat 0:977e87915078 23 int parse_query_parameter_value_from_uri(const char *uri, const char *parameter_name, const char **parameter_value)
vithyat 0:977e87915078 24 {
vithyat 0:977e87915078 25 assert(uri);
vithyat 0:977e87915078 26 assert(parameter_name);
vithyat 0:977e87915078 27 assert(parameter_value);
vithyat 0:977e87915078 28
vithyat 0:977e87915078 29 *parameter_value = NULL;
vithyat 0:977e87915078 30
vithyat 0:977e87915078 31 char *value_ptr = strchr(uri, '?');
vithyat 0:977e87915078 32 if (value_ptr == NULL) {
vithyat 0:977e87915078 33 return -1;
vithyat 0:977e87915078 34 }
vithyat 0:977e87915078 35
vithyat 0:977e87915078 36 // Skip '?'
vithyat 0:977e87915078 37 value_ptr++;
vithyat 0:977e87915078 38
vithyat 0:977e87915078 39 return parse_query_parameter_value_from_query(value_ptr, parameter_name, parameter_value);
vithyat 0:977e87915078 40 }
vithyat 0:977e87915078 41
vithyat 0:977e87915078 42 // Use int return value instead of ssize_t since we don't have it for all platforms
vithyat 0:977e87915078 43 int parse_query_parameter_value_from_query(const char *query, const char *parameter_name, const char **parameter_value)
vithyat 0:977e87915078 44 {
vithyat 0:977e87915078 45 assert(query);
vithyat 0:977e87915078 46 assert(parameter_name);
vithyat 0:977e87915078 47 assert(parameter_value);
vithyat 0:977e87915078 48
vithyat 0:977e87915078 49 *parameter_value = NULL;
vithyat 0:977e87915078 50 const int param_name_len = strlen(parameter_name);
vithyat 0:977e87915078 51 const int query_len = strlen(query);
vithyat 0:977e87915078 52
vithyat 0:977e87915078 53 if (param_name_len == 0 || query_len == 0) {
vithyat 0:977e87915078 54 return -1;
vithyat 0:977e87915078 55 }
vithyat 0:977e87915078 56
vithyat 0:977e87915078 57 const char *value_ptr = query;
vithyat 0:977e87915078 58
vithyat 0:977e87915078 59 do {
vithyat 0:977e87915078 60 value_ptr = strstr(value_ptr, parameter_name);
vithyat 0:977e87915078 61
vithyat 0:977e87915078 62 // No match at all, then break
vithyat 0:977e87915078 63 if (!value_ptr) {
vithyat 0:977e87915078 64 break;
vithyat 0:977e87915078 65 }
vithyat 0:977e87915078 66
vithyat 0:977e87915078 67 // Check that match was at the beginning or there is a & before the match
vithyat 0:977e87915078 68 if (!(value_ptr == query || *(value_ptr - 1) == '&')) {
vithyat 0:977e87915078 69 // Offset value_ptr past the match to find next one
vithyat 0:977e87915078 70 value_ptr += param_name_len;
vithyat 0:977e87915078 71 continue;
vithyat 0:977e87915078 72 }
vithyat 0:977e87915078 73
vithyat 0:977e87915078 74 // Offset to after parameter name
vithyat 0:977e87915078 75 value_ptr += param_name_len;
vithyat 0:977e87915078 76
vithyat 0:977e87915078 77 // Check that parameter was not at the end
vithyat 0:977e87915078 78 if (value_ptr >= query + query_len) {
vithyat 0:977e87915078 79 break;
vithyat 0:977e87915078 80 }
vithyat 0:977e87915078 81
vithyat 0:977e87915078 82 // CHeck that there is an '=' after parameter name, continue if not as there might be
vithyat 0:977e87915078 83 // another parameter left
vithyat 0:977e87915078 84 if (*value_ptr != '=') {
vithyat 0:977e87915078 85 continue;
vithyat 0:977e87915078 86 }
vithyat 0:977e87915078 87
vithyat 0:977e87915078 88 *parameter_value = ++value_ptr;
vithyat 0:977e87915078 89 break;
vithyat 0:977e87915078 90
vithyat 0:977e87915078 91 } while (value_ptr);
vithyat 0:977e87915078 92
vithyat 0:977e87915078 93 // If parameter found, calculate length of value either ending at an '&' or the end
vithyat 0:977e87915078 94 if (*parameter_value != NULL) {
vithyat 0:977e87915078 95 value_ptr = strchr(*parameter_value, '&');
vithyat 0:977e87915078 96 if (value_ptr) {
vithyat 0:977e87915078 97 return value_ptr - *parameter_value;
vithyat 0:977e87915078 98 }
vithyat 0:977e87915078 99 return strlen(*parameter_value);
vithyat 0:977e87915078 100 }
vithyat 0:977e87915078 101 return -1;
vithyat 0:977e87915078 102 }