Azure IoT common library
Dependents: STM32F746_iothub_client_sample_mqtt f767zi_mqtt iothub_client_sample_amqp iothub_client_sample_http ... more
connection_string_parser.c
- Committer:
- AzureIoTClient
- Date:
- 2017-01-13
- Revision:
- 18:6d8a413a4d9a
- Parent:
- 16:18e7ebd42bb2
- Child:
- 21:b92006c5b9ff
File content as of revision 18:6d8a413a4d9a:
// Copyright (c) Microsoft. All rights reserved. // Licensed under the MIT license. See LICENSE file in the project root for full license information. #include "azure_c_shared_utility/connection_string_parser.h" #include "azure_c_shared_utility/map.h" #include "azure_c_shared_utility/strings.h" #include "azure_c_shared_utility/string_tokenizer.h" #include <stdbool.h> #include "azure_c_shared_utility/xlogging.h" MAP_HANDLE connectionstringparser_parse_from_char(const char* connection_string) { MAP_HANDLE result; STRING_HANDLE connString = NULL; /* 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.]*/ if ((connString = STRING_construct(connection_string)) == NULL) { /* Codes_SRS_CONNECTIONSTRINGPARSER_21_021: [If connectionstringparser_parse_from_char get error creating a STRING_HANDLE, it shall return NULL.]*/ LogError("Error constructing connection String"); result = NULL; } else { result = connectionstringparser_parse(connString); } return result; } /* 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.] */ MAP_HANDLE connectionstringparser_parse(STRING_HANDLE connection_string) { MAP_HANDLE result; if (connection_string == NULL) { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_002: [If connection_string is NULL then connectionstringparser_parse shall fail and return NULL.] */ result = NULL; LogError("NULL connection string passed to tokenizer."); } else { /* 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.] */ /* Codes_SRS_CONNECTIONSTRINGPARSER_01_004: [connectionstringparser_parse shall start scanning at the beginning of the connection string.] */ STRING_TOKENIZER_HANDLE tokenizer = STRING_TOKENIZER_create(connection_string); if (tokenizer == NULL) { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_015: [If STRING_TOKENIZER_create fails, connectionstringparser_parse shall fail and return NULL.] */ result = NULL; LogError("Error creating STRING tokenizer."); } else { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_016: [2 STRINGs shall be allocated in order to hold the to be parsed key and value tokens.] */ STRING_HANDLE token_key_string = STRING_new(); if (token_key_string == NULL) { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_017: [If allocating the STRINGs fails connectionstringparser_parse shall fail and return NULL.] */ result = NULL; LogError("Error creating key token STRING."); } else { STRING_HANDLE token_value_string = STRING_new(); if (token_value_string == NULL) { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_017: [If allocating the STRINGs fails connectionstringparser_parse shall fail and return NULL.] */ result = NULL; LogError("Error creating value token STRING."); } else { result = Map_Create(NULL); if (result == NULL) { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_018: [If creating the result map fails, then connectionstringparser_parse shall return NULL.] */ LogError("Error creating Map."); } else { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_005: [The following actions shall be repeated until parsing is complete:] */ /* 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.] */ /* Codes_SRS_CONNECTIONSTRINGPARSER_01_007: [If STRING_TOKENIZER_get_next_token fails, parsing shall be considered complete.] */ while (STRING_TOKENIZER_get_next_token(tokenizer, token_key_string, "=") == 0) { bool is_error = false; /* 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.] */ if (STRING_TOKENIZER_get_next_token(tokenizer, token_value_string, ";") != 0) { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_009: [If STRING_TOKENIZER_get_next_token fails, connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */ is_error = true; LogError("Error reading value token from the connection string."); } else { /* 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.] */ const char* token = STRING_c_str(token_key_string); /* Codes_SRS_CONNECTIONSTRINGPARSER_01_013: [If STRING_c_str fails then connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */ if ((token == NULL) || /* Codes_SRS_CONNECTIONSTRINGPARSER_01_019: [If the key length is zero then connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */ (strlen(token) == 0)) { is_error = true; LogError("The key token is NULL or empty."); } else { /* 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.] */ const char* value = STRING_c_str(token_value_string); if (value == NULL) { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_013: [If STRING_c_str fails then connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */ is_error = true; LogError("Could not get C string for value token."); } else { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_010: [The key and value shall be added to the result map by using Map_Add.] */ if (Map_Add(result, token, value) != 0) { /* Codes_SRS_CONNECTIONSTRINGPARSER_01_012: [If Map_Add fails connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */ is_error = true; LogError("Could not add the key/value pair to the result map."); } } } } if (is_error) { LogError("Error parsing connection string."); Map_Destroy(result); result = NULL; break; } } } STRING_delete(token_value_string); } STRING_delete(token_key_string); } /* 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.] */ STRING_TOKENIZER_destroy(tokenizer); } } return result; } /* Codes_SRS_CONNECTIONSTRINGPARSER_21_022: [connectionstringparser_splitHostName_from_char shall split the provided hostName in name and suffix.]*/ int connectionstringparser_splitHostName_from_char(const char* hostName, STRING_HANDLE nameString, STRING_HANDLE suffixString) { int result; const char* runHostName = hostName; if ((hostName == NULL) || ((*hostName) == '\0') || ((*hostName) == '.') || (nameString == NULL) || (suffixString == NULL)) { /* Codes_SRS_CONNECTIONSTRINGPARSER_21_026: [If the hostName is NULL, connectionstringparser_splitHostName_from_char shall return __LINE__.]*/ /* Codes_SRS_CONNECTIONSTRINGPARSER_21_027: [If the hostName is an empty string, connectionstringparser_splitHostName_from_char shall return __LINE__.]*/ /* Codes_SRS_CONNECTIONSTRINGPARSER_21_028: [If the nameString is NULL, connectionstringparser_splitHostName_from_char shall return __LINE__.]*/ /* Codes_SRS_CONNECTIONSTRINGPARSER_21_029: [If the suffixString is NULL, connectionstringparser_splitHostName_from_char shall return __LINE__.]*/ /* Codes_SRS_CONNECTIONSTRINGPARSER_21_030: [If the hostName is not a valid host name, connectionstringparser_splitHostName_from_char shall return __LINE__.]*/ result = __LINE__; } else { while ((*runHostName) != '\0') { if ((*runHostName) == '.') { /* 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.]*/ /* 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.]*/ runHostName++; break; } runHostName++; } if ((*runHostName) == '\0') { /* Codes_SRS_CONNECTIONSTRINGPARSER_21_030: [If the hostName is not a valid host name, connectionstringparser_splitHostName_from_char shall return __LINE__.]*/ result = __LINE__; } else { /* 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.]*/ if (STRING_copy_n(nameString, hostName, runHostName - hostName - 1) != 0) { /* Codes_SRS_CONNECTIONSTRINGPARSER_21_031: [If connectionstringparser_splitHostName_from_char get error copying the name to the nameString, it shall return __LINE__.]*/ result = __LINE__; } /* 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.]*/ else if (STRING_copy(suffixString, runHostName) != 0) { /* Codes_SRS_CONNECTIONSTRINGPARSER_21_032: [If connectionstringparser_splitHostName_from_char get error copying the suffix to the suffixString, it shall return __LINE__.]*/ result = __LINE__; } else { /* Codes_SRS_CONNECTIONSTRINGPARSER_21_025: [If connectionstringparser_splitHostName_from_char get success splitting the hostName, it shall return 0.]*/ result = 0; } } } return result; } int connectionstringparser_splitHostName(STRING_HANDLE hostNameString, STRING_HANDLE nameString, STRING_HANDLE suffixString) { int result; if (hostNameString == NULL) { /* Codes_SRS_CONNECTIONSTRINGPARSER_21_034: [If the hostNameString is NULL, connectionstringparser_splitHostName shall return __LINE__.]*/ result = __LINE__; } else { /* 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.]*/ result = connectionstringparser_splitHostName_from_char(STRING_c_str(hostNameString), nameString, suffixString); } return result; }