source: azure_iot_hub_f767zi/trunk/azure_iot_sdk/c-utility/src/connection_string_parser.c@ 457

Last change on this file since 457 was 457, checked in by coas-nagasima, 4 years ago

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1// Copyright (c) Microsoft. All rights reserved.
2// Licensed under the MIT license. See LICENSE file in the project root for full license information.
3
4#include <stdbool.h>
5#include "azure_c_shared_utility/connection_string_parser.h"
6#include "azure_c_shared_utility/map.h"
7#include "azure_c_shared_utility/strings.h"
8#include "azure_c_shared_utility/string_tokenizer.h"
9#include "azure_c_shared_utility/optimize_size.h"
10#include "azure_c_shared_utility/xlogging.h"
11
12
13MAP_HANDLE connectionstringparser_parse_from_char(const char* connection_string)
14{
15 MAP_HANDLE result;
16 STRING_HANDLE connString = NULL;
17
18 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_020: [connectionstringparser_parse_from_char shall create a STRING_HANDLE from the connection_string passed in as argument and parse it using the connectionstringparser_parse.]*/
19 if ((connString = STRING_construct(connection_string)) == NULL)
20 {
21 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_021: [If connectionstringparser_parse_from_char get error creating a STRING_HANDLE, it shall return NULL.]*/
22 LogError("Error constructing connection String");
23 result = NULL;
24 }
25 else
26 {
27 result = connectionstringparser_parse(connString);
28 STRING_delete(connString);
29 }
30
31 return result;
32}
33
34/* Codes_SRS_CONNECTIONSTRINGPARSER_01_001: [connectionstringparser_parse shall parse all key value pairs from the connection_string passed in as argument and return a new map that holds the key/value pairs.] */
35MAP_HANDLE connectionstringparser_parse(STRING_HANDLE connection_string)
36{
37 MAP_HANDLE result;
38
39 if (connection_string == NULL)
40 {
41 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_002: [If connection_string is NULL then connectionstringparser_parse shall fail and return NULL.] */
42 result = NULL;
43 LogError("NULL connection string passed to tokenizer.");
44 }
45 else
46 {
47 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_003: [connectionstringparser_parse shall create a STRING tokenizer to be used for parsing the connection string, by calling STRING_TOKENIZER_create.] */
48 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_004: [connectionstringparser_parse shall start scanning at the beginning of the connection string.] */
49 STRING_TOKENIZER_HANDLE tokenizer = STRING_TOKENIZER_create(connection_string);
50 if (tokenizer == NULL)
51 {
52 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_015: [If STRING_TOKENIZER_create fails, connectionstringparser_parse shall fail and return NULL.] */
53 result = NULL;
54 LogError("Error creating STRING tokenizer.");
55 }
56 else
57 {
58 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_016: [2 STRINGs shall be allocated in order to hold the to be parsed key and value tokens.] */
59 STRING_HANDLE token_key_string = STRING_new();
60 if (token_key_string == NULL)
61 {
62 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_017: [If allocating the STRINGs fails connectionstringparser_parse shall fail and return NULL.] */
63 result = NULL;
64 LogError("Error creating key token STRING.");
65 }
66 else
67 {
68 STRING_HANDLE token_value_string = STRING_new();
69 if (token_value_string == NULL)
70 {
71 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_017: [If allocating the STRINGs fails connectionstringparser_parse shall fail and return NULL.] */
72 result = NULL;
73 LogError("Error creating value token STRING.");
74 }
75 else
76 {
77 result = Map_Create(NULL);
78 if (result == NULL)
79 {
80 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_018: [If creating the result map fails, then connectionstringparser_parse shall return NULL.] */
81 LogError("Error creating Map.");
82 }
83 else
84 {
85 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_005: [The following actions shall be repeated until parsing is complete:] */
86 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_006: [connectionstringparser_parse shall find a token (the key of the key/value pair) delimited by the = character, by calling STRING_TOKENIZER_get_next_token.] */
87 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_007: [If STRING_TOKENIZER_get_next_token fails, parsing shall be considered complete.] */
88 while (STRING_TOKENIZER_get_next_token(tokenizer, token_key_string, "=") == 0)
89 {
90 bool is_error = false;
91
92 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_008: [connectionstringparser_parse shall find a token (the value of the key/value pair) delimited by the ; character, by calling STRING_TOKENIZER_get_next_token.] */
93 if (STRING_TOKENIZER_get_next_token(tokenizer, token_value_string, ";") != 0)
94 {
95 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_009: [If STRING_TOKENIZER_get_next_token fails, connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */
96 is_error = true;
97 LogError("Error reading value token from the connection string.");
98 }
99 else
100 {
101 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_011: [The C strings for the key and value shall be extracted from the previously parsed STRINGs by using STRING_c_str.] */
102 const char* token = STRING_c_str(token_key_string);
103 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_013: [If STRING_c_str fails then connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */
104 if ((token == NULL) ||
105 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_019: [If the key length is zero then connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */
106 (strlen(token) == 0))
107 {
108 is_error = true;
109 LogError("The key token is NULL or empty.");
110 }
111 else
112 {
113 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_011: [The C strings for the key and value shall be extracted from the previously parsed STRINGs by using STRING_c_str.] */
114 const char* value = STRING_c_str(token_value_string);
115 if (value == NULL)
116 {
117 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_013: [If STRING_c_str fails then connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */
118 is_error = true;
119 LogError("Could not get C string for value token.");
120 }
121 else
122 {
123 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_010: [The key and value shall be added to the result map by using Map_Add.] */
124 if (Map_Add(result, token, value) != MAP_OK)
125 {
126 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_012: [If Map_Add fails connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */
127 is_error = true;
128 LogError("Could not add the key/value pair to the result map.");
129 }
130 }
131 }
132 }
133
134 if (is_error)
135 {
136 LogError("Error parsing connection string.");
137 Map_Destroy(result);
138 result = NULL;
139 break;
140 }
141 }
142 }
143
144 STRING_delete(token_value_string);
145 }
146
147 STRING_delete(token_key_string);
148 }
149
150 /* Codes_SRS_CONNECTIONSTRINGPARSER_01_014: [After the parsing is complete the previously allocated STRINGs and STRING tokenizer shall be freed by calling STRING_TOKENIZER_destroy.] */
151 STRING_TOKENIZER_destroy(tokenizer);
152 }
153 }
154
155 return result;
156}
157
158/* Codes_SRS_CONNECTIONSTRINGPARSER_21_022: [connectionstringparser_splitHostName_from_char shall split the provided hostName in name and suffix.]*/
159int connectionstringparser_splitHostName_from_char(const char* hostName, STRING_HANDLE nameString, STRING_HANDLE suffixString)
160{
161 int result;
162 const char* runHostName = hostName;
163
164 if ((hostName == NULL) || ((*hostName) == '\0') || ((*hostName) == '.') || (nameString == NULL) || (suffixString == NULL))
165 {
166 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_026: [If the hostName is NULL, connectionstringparser_splitHostName_from_char shall return MU_FAILURE.]*/
167 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_027: [If the hostName is an empty string, connectionstringparser_splitHostName_from_char shall return MU_FAILURE.]*/
168 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_028: [If the nameString is NULL, connectionstringparser_splitHostName_from_char shall return MU_FAILURE.]*/
169 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_029: [If the suffixString is NULL, connectionstringparser_splitHostName_from_char shall return MU_FAILURE.]*/
170 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_030: [If the hostName is not a valid host name, connectionstringparser_splitHostName_from_char shall return MU_FAILURE.]*/
171 result = MU_FAILURE;
172 }
173 else
174 {
175 while ((*runHostName) != '\0')
176 {
177 if ((*runHostName) == '.')
178 {
179 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_023: [connectionstringparser_splitHostName_from_char shall copy all characters, from the beginning of the hostName to the first . to the nameString.]*/
180 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_024: [connectionstringparser_splitHostName_from_char shall copy all characters, from the first . to the end of the hostName, to the suffixString.]*/
181 runHostName++;
182 break;
183 }
184 runHostName++;
185 }
186
187 if ((*runHostName) == '\0')
188 {
189 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_030: [If the hostName is not a valid host name, connectionstringparser_splitHostName_from_char shall return MU_FAILURE.]*/
190 result = MU_FAILURE;
191 }
192 else
193 {
194 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_023: [connectionstringparser_splitHostName_from_char shall copy all characters, from the beginning of the hostName to the first . to the nameString.]*/
195 if (STRING_copy_n(nameString, hostName, runHostName - hostName - 1) != 0)
196 {
197 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_031: [If connectionstringparser_splitHostName_from_char get error copying the name to the nameString, it shall return MU_FAILURE.]*/
198 result = MU_FAILURE;
199 }
200 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_024: [connectionstringparser_splitHostName_from_char shall copy all characters, from the first . to the end of the hostName, to the suffixString.]*/
201 else if (STRING_copy(suffixString, runHostName) != 0)
202 {
203 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_032: [If connectionstringparser_splitHostName_from_char get error copying the suffix to the suffixString, it shall return MU_FAILURE.]*/
204 result = MU_FAILURE;
205 }
206 else
207 {
208 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_025: [If connectionstringparser_splitHostName_from_char get success splitting the hostName, it shall return 0.]*/
209 result = 0;
210 }
211 }
212 }
213
214 return result;
215}
216
217
218int connectionstringparser_splitHostName(STRING_HANDLE hostNameString, STRING_HANDLE nameString, STRING_HANDLE suffixString)
219{
220 int result;
221
222 if (hostNameString == NULL)
223 {
224 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_034: [If the hostNameString is NULL, connectionstringparser_splitHostName shall return MU_FAILURE.]*/
225 result = MU_FAILURE;
226 }
227 else
228 {
229 /* Codes_SRS_CONNECTIONSTRINGPARSER_21_033: [connectionstringparser_splitHostName shall convert the hostNameString to a connection_string passed in as argument, and call connectionstringparser_splitHostName_from_char.]*/
230 result = connectionstringparser_splitHostName_from_char(STRING_c_str(hostNameString), nameString, suffixString);
231 }
232
233 return result;
234}
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